This document reviews different techniques for differential protection of power transformers. It begins with an introduction to the importance of protecting expensive power transformers from internal faults. It then summarizes several existing techniques for digital relaying, including signal processing methods, model-based techniques, and artificial neural networks. The remainder of the document discusses specific techniques in more detail, including methods using current and voltage ratios, wavelet transforms, second central moment analysis, convolutional neural networks, and wavelet energy entropy. Each technique is evaluated based on its ability to quickly and reliably distinguish between internal faults and transient events like inrush currents. The reviewed methods generally demonstrate improved performance over traditional techniques in differentiating fault types and avoiding maloperation.
IRJET - Transmission Line Fault Classification using DWTIRJET Journal
1) The document discusses using discrete wavelet transform (DWT) to classify faults on transmission lines based on voltage and current signals.
2) A simulation is conducted using PSCAD software to test DWT fault classification on different fault types (A-G, B-G, A-B, etc.).
3) The results show that DWT can effectively detect and classify faults by analyzing the energy of approximation coefficients from current signals and comparing them to an adaptive threshold.
Recent Trends InDigital Differential Protection of Power Transformerijiert bestjournal
Digital protection has several advantages over conventional protection scheme. For protecting
costliest and vital equipment such as transformer, digital schemes have been proposed by several authors in recent
past. This paper throws light on all such efforts and it will help researchers to focus on integrated efforts to protect
transformer in a better and efficient way. Artificial intelligence along with signature and pattern recognition
techniques give much more useful information about happenings in and outside of transformer. Efforts are put by
all concerned with fast, accurate, flexible, reliable and easy to understand scheme of protection. With the advent of
soft computing methods condition monitoring with protection has become on line objective. Keeping all these
state of art techniques of protection, this paper will be a useful resource. Discrimination of several faults external
and internal needs digital signal processing and feature extraction as well. Many algorithms are proposed as
summarized in paper.
The document discusses the design of a microcontroller-based system for parameter measurement and protection of electrical transformers using power line communication. It aims to monitor transformer parameters like voltage, current, temperature and protect against overcurrent and overvoltage faults. The system uses current and voltage sensors connected to a microcontroller to measure parameters. If a fault is detected, the microcontroller sends a trip signal to a relay to disconnect the transformer. It is intended to provide improved reliability compared to traditional electromechanical protection techniques.
IRJET - Digital Differential Protection of Power Transformer using MATLABIRJET Journal
1) The document discusses digital differential protection of power transformers using MATLAB. Differential protection relies on the principle that the input power to a transformer under normal conditions equals the output power.
2) It describes how current transformers are used to compare primary and secondary currents and send any difference to a relay to trip for internal faults. The MATLAB model simulates different types of faults like line-to-ground and line-to-line-to-ground.
3) Differential protection provides fast, selective protection for expensive equipment like transformers. It is not affected by external faults but cannot operate during those conditions. The technology is made more accurate and flexible using microcontrollers.
IRJET- Overhead Line Protection with Automatic Switch by using PLC AutomationIRJET Journal
This document describes a system to automatically protect overhead transmission lines from overload faults using a PLC-controlled air break switch. The system monitors current on the line using a sensor and can open the switch if overload is detected. This allows faulty sections to be isolated without interrupting the whole line. The automatic switch provides remote operation and is more reliable than conventional manual switches. It aims to quickly detect and resolve overload problems through automation using a PLC to control the switch based on current readings.
Analysis of distance protection relay in presence of static synchronous compe...IAEME Publication
This document analyzes the impact of a Static Synchronous Compensator (STATCOM) on distance protection relays for transmission lines. It presents a simulation of a 400kV, 300km transmission line with a 100MVA STATCOM at the midpoint and distance relays at each end. The simulation shows that the STATCOM affects the impedance seen by the relays during faults, as it injects current and alters line parameters. Traditional relay settings based solely on line impedance may not operate correctly with a STATCOM present. The document discusses modeling of the transmission line, STATCOM, and distance relays in MATLAB/Simulink to study their performance under normal and fault conditions with the STATCOM.
A transient current based micro grid connected power system protection scheme...IJECEIAES
Micro-grids comprise Distributed Energy Resources (DER’s) with low voltage distribution networks having controllable loads those can operate with different voltage levels are connected to the micro-grid and operated in grid mode or islanding mode in a coordinated way of control. DER’s provides clear environment-economical benefits for society and consumer utilities. But their development poses great technical challenges mainly protection of main and micro grid. Protection scheme must have to respond to both the main grid and micro-grid faults. If the fault is occurs on main grid, the response must isolate the DER’s from the main grid rapidly to protect the system loads. If the fault ocuurs within the micro-grid, the protection scheme must coordinate and isolates the least priority possible part of the grid to eliminate the fault. In order to deal with the bidirectional energy flow due to large numbers of micro sources new protection schemes are required. The system is simulated using MATLAB Wavelet Tool box and Wavelet based Multi-resolution Analysis is considered. Wavelet based Multi-resolution Analysis is used for detection, discrimination and location of faults on transmission network. This paper is discussed a transient current based micro-grid connected power system protection scheme using Wavelet Approach described on wavelet detailed-coefficients of Mother Biorthogonal 1.5 wavelet. The proposed algorithm is tested in micro-grid connected power systems environment and proved for the detection, discrimination and location of faults which is almost independent of fault impedance, fault inception angle (FIA) and fault distance of feeder line.
Fuzzy Logic-Based Fault Classification for Transmission Line AnalysisIRJET Journal
This document discusses a study that uses fuzzy logic to classify faults on electric power transmission lines. It begins with an abstract that outlines using fuzzy logic for fault classification. It then provides background on transmission lines, faults, and the need for accurate fault analysis. The document describes fuzzy logic and how it is well-suited for applications with uncertainty. It details using fuzzy logic to classify four types of faults - single phase to ground, two-phase, two-phase to ground, and three-phase - by analyzing voltage and current measurements. Simulation results demonstrate the fuzzy logic approach can accurately identify different fault types on a transmission line model.
IRJET - Transmission Line Fault Classification using DWTIRJET Journal
1) The document discusses using discrete wavelet transform (DWT) to classify faults on transmission lines based on voltage and current signals.
2) A simulation is conducted using PSCAD software to test DWT fault classification on different fault types (A-G, B-G, A-B, etc.).
3) The results show that DWT can effectively detect and classify faults by analyzing the energy of approximation coefficients from current signals and comparing them to an adaptive threshold.
Recent Trends InDigital Differential Protection of Power Transformerijiert bestjournal
Digital protection has several advantages over conventional protection scheme. For protecting
costliest and vital equipment such as transformer, digital schemes have been proposed by several authors in recent
past. This paper throws light on all such efforts and it will help researchers to focus on integrated efforts to protect
transformer in a better and efficient way. Artificial intelligence along with signature and pattern recognition
techniques give much more useful information about happenings in and outside of transformer. Efforts are put by
all concerned with fast, accurate, flexible, reliable and easy to understand scheme of protection. With the advent of
soft computing methods condition monitoring with protection has become on line objective. Keeping all these
state of art techniques of protection, this paper will be a useful resource. Discrimination of several faults external
and internal needs digital signal processing and feature extraction as well. Many algorithms are proposed as
summarized in paper.
The document discusses the design of a microcontroller-based system for parameter measurement and protection of electrical transformers using power line communication. It aims to monitor transformer parameters like voltage, current, temperature and protect against overcurrent and overvoltage faults. The system uses current and voltage sensors connected to a microcontroller to measure parameters. If a fault is detected, the microcontroller sends a trip signal to a relay to disconnect the transformer. It is intended to provide improved reliability compared to traditional electromechanical protection techniques.
IRJET - Digital Differential Protection of Power Transformer using MATLABIRJET Journal
1) The document discusses digital differential protection of power transformers using MATLAB. Differential protection relies on the principle that the input power to a transformer under normal conditions equals the output power.
2) It describes how current transformers are used to compare primary and secondary currents and send any difference to a relay to trip for internal faults. The MATLAB model simulates different types of faults like line-to-ground and line-to-line-to-ground.
3) Differential protection provides fast, selective protection for expensive equipment like transformers. It is not affected by external faults but cannot operate during those conditions. The technology is made more accurate and flexible using microcontrollers.
IRJET- Overhead Line Protection with Automatic Switch by using PLC AutomationIRJET Journal
This document describes a system to automatically protect overhead transmission lines from overload faults using a PLC-controlled air break switch. The system monitors current on the line using a sensor and can open the switch if overload is detected. This allows faulty sections to be isolated without interrupting the whole line. The automatic switch provides remote operation and is more reliable than conventional manual switches. It aims to quickly detect and resolve overload problems through automation using a PLC to control the switch based on current readings.
Analysis of distance protection relay in presence of static synchronous compe...IAEME Publication
This document analyzes the impact of a Static Synchronous Compensator (STATCOM) on distance protection relays for transmission lines. It presents a simulation of a 400kV, 300km transmission line with a 100MVA STATCOM at the midpoint and distance relays at each end. The simulation shows that the STATCOM affects the impedance seen by the relays during faults, as it injects current and alters line parameters. Traditional relay settings based solely on line impedance may not operate correctly with a STATCOM present. The document discusses modeling of the transmission line, STATCOM, and distance relays in MATLAB/Simulink to study their performance under normal and fault conditions with the STATCOM.
A transient current based micro grid connected power system protection scheme...IJECEIAES
Micro-grids comprise Distributed Energy Resources (DER’s) with low voltage distribution networks having controllable loads those can operate with different voltage levels are connected to the micro-grid and operated in grid mode or islanding mode in a coordinated way of control. DER’s provides clear environment-economical benefits for society and consumer utilities. But their development poses great technical challenges mainly protection of main and micro grid. Protection scheme must have to respond to both the main grid and micro-grid faults. If the fault is occurs on main grid, the response must isolate the DER’s from the main grid rapidly to protect the system loads. If the fault ocuurs within the micro-grid, the protection scheme must coordinate and isolates the least priority possible part of the grid to eliminate the fault. In order to deal with the bidirectional energy flow due to large numbers of micro sources new protection schemes are required. The system is simulated using MATLAB Wavelet Tool box and Wavelet based Multi-resolution Analysis is considered. Wavelet based Multi-resolution Analysis is used for detection, discrimination and location of faults on transmission network. This paper is discussed a transient current based micro-grid connected power system protection scheme using Wavelet Approach described on wavelet detailed-coefficients of Mother Biorthogonal 1.5 wavelet. The proposed algorithm is tested in micro-grid connected power systems environment and proved for the detection, discrimination and location of faults which is almost independent of fault impedance, fault inception angle (FIA) and fault distance of feeder line.
Fuzzy Logic-Based Fault Classification for Transmission Line AnalysisIRJET Journal
This document discusses a study that uses fuzzy logic to classify faults on electric power transmission lines. It begins with an abstract that outlines using fuzzy logic for fault classification. It then provides background on transmission lines, faults, and the need for accurate fault analysis. The document describes fuzzy logic and how it is well-suited for applications with uncertainty. It details using fuzzy logic to classify four types of faults - single phase to ground, two-phase, two-phase to ground, and three-phase - by analyzing voltage and current measurements. Simulation results demonstrate the fuzzy logic approach can accurately identify different fault types on a transmission line model.
An adaptive protection scheme to prevent recloser-fuse miscoordination in dis...iosrjce
IOSR Journal of Electrical and Electronics Engineering(IOSR-JEEE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of electrical and electronics engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in electrical and electronics engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
This document discusses an adaptive protection scheme to prevent recloser-fuse miscoordination in distribution feeders with distributed generation. The presence of distributed generation can interfere with the coordination between reclosers and fuses by changing fault current levels. The proposed method adaptively modifies recloser time dial settings to address this issue. The method is tested on a simulation of an actual distribution feeder assuming different distributed generation capacities and locations. Optimization is also performed to determine the optimal location and capacity of two distributed generation units while maintaining recloser-fuse coordination and minimizing losses.
IRJET - Overview of Smart Tower Technology for Transmission LinesIRJET Journal
This document provides an overview of smart tower technology for transmission lines. It discusses how current fault location methods can take hours to locate faults on transmission lines. The proposed system uses sensors, a microcontroller, and GSM module to more quickly detect faults, determine the type of fault, and send an alert with the fault location. It would reduce outage time by expediting the response of repair crews. The system could be applied to transmission lines, textile mills, and other industrial settings where quick fault detection is important. It presents several fault location methods and highlights impedance-based and traveling wave-based approaches as most common.
Arc Fault and Flash Signal Analysis and Detection in DC Distribution Systems ...IRJET Journal
This document summarizes a research paper that proposes a new approach for detecting arc faults and flashes in DC distribution systems using wavelet transform and fuzzy logic. The researchers designed a model of an arc condition and analyzed the arc voltage using wavelet transform. Wavelet analysis was able to extract features of the signal that were then used to design a fuzzy rule base. This approach allows for arc fault detection by analyzing features in the PV output voltage. The full system was implemented and tested in MATLAB. The proposed method uses wavelet transform for spectral energy calibration of arc faults, which provides a more detectable signal signature compared to other techniques. This allows for accurate arc fault analysis and classification in DC systems.
Fault analysis in power system using power systems computer aided designIJAAS Team
This work presents a fault analysis simulation model of an IEEE 30 bus system in a distribution network. This work annalysed the effect of fault current and fault voltage in a distribution system. A circuit breaker was introduced into the system to neutralize the effect of the fault. The system was run on a PSCAD software and results were obtained. The system was monitored based on the start time and the end time of the fault and how well the circuit breaker reacts with those times. Fault occurred from 0.100 to 0.300 seconds before it was removed. At the time fault was not applied (i.e. from 0.00 to 0.100 and from 0.300 to 0.72), the circuit breaker was close and became open when fault was applied so as to cut off current flow through the line.The result obtained gave the disruption caused by the fault and the quick response of the circuit breaker in neutralizing it. Results gotten are based on when the circuit breaker is close and no fault is applied and when the circuit breaker is open due to fault. From this work, it was obtained that circuit breakers are very essential in system protection and reliability.
Microcontroller based transformer protectioAminu Bugaje
This document provides an introduction and background to a project on designing a microcontroller-based transformer protection system. It discusses how transformers are critical components in power systems that require protection against faults like short circuits, overcurrent and overvoltage. The document then reviews previous work on transformer protection and outlines the objectives of this project, which are to design current and voltage sensing circuits, develop a microcontroller algorithm for overload, overvoltage and undervoltage protection, and test the system's performance. The chapter concludes by outlining the scope and limitations of the project, which involves both hardware and software design to develop a protection system that can monitor transformer parameters and trip circuit breakers or relays during faults.
Protecting the wind energy system from a short circuit (requirements - challe...IRJET Journal
This document discusses short circuit faults in wind energy systems and their protection challenges. It describes the components of a wind power system and classifications of wind turbines by generator type. Short circuits are one of the most common fault types and can damage equipment. Protective devices like fuses, relays, and circuit breakers are used to isolate faults. However, the variable and intermittent nature of wind power poses challenges for protection coordination and settings. Adaptive differential protection and adaptive overcurrent protection are presented as solutions to overcome these challenges. Artificial intelligence techniques may also help protect networks in the future.
Detection of Power Grid Synchronization Failure on Sensing Frequency and Volt...IRJET Journal
This document presents a system to detect power grid synchronization failures by sensing abnormalities in frequency and voltage. The system uses an Arduino microcontroller to monitor voltage and frequency from sensors. If the values go outside acceptable limits, it triggers a relay to disconnect the load and sends alerts by GSM and GPS. The system aims to prevent blackouts by detecting issues early and allowing time for response. It was tested using loads like lamps and successfully detected and responded to over/under voltage and frequency changes by displaying warnings on an LCD. This provides automatic grid protection while synchronizing multiple generation sources in parallel.
Zigbee based differential pilot protection of transmission lineeSAT Journals
Abstract
This paper describes the limitations of the existing relays in the detection of fault. It also describes the benefits of using the differential pilot protection of the transmission line. Among other advantages one of its main advantages is its speed, which is required in a.c. systems to remain in synchronism (as angle δ is to be kept small). In the end of this paper a model has been created in the laboratory by using two incandescent bulbs in parallel to create the difference in the two parts of the model, this difference is detected and appropriate action is finally taken to trip the circuit.
Keywords: Zig-bee, pilot protection, differential protection, transmission line, Hall Effect sensors.
Zigbee based differential pilot protection of transmission lineeSAT Publishing House
This document describes a study on using Zigbee wireless communication technology for differential pilot protection of transmission lines. It discusses limitations of existing relay-based protection methods, such as inability to differentiate between fault and inrush currents. The paper then presents differential pilot protection as an alternative, enabled by replacing wired pilot communication with wireless technology. A laboratory model is created using hall effect sensors, microcontroller, and Zigbee modules to demonstrate this approach and its ability to precisely define boundaries, detect faults based on both magnitude and direction, and achieve fast tripping times.
IRJET- Wavelet Decomposition along with ANN used for Fault DetectionIRJET Journal
This document presents a technique for fault detection in systems using wavelet decomposition and artificial neural networks (ANN). It discusses using discrete wavelet transform (DWT) to extract features from signals for fault detection, which overcomes limitations of other techniques like fast Fourier transform (FFT) for non-stationary signals. The DWT decomposes signals into different frequency bands to analyze energy content, which is then fed as input to an ANN for fault classification and detection. The technique aims to provide earlier detection of faults than conventional methods through feature extraction and ANN pattern recognition of faults.
IRJET- A Unique Methodology for Transmission Line Breakage Detection and ...IRJET Journal
This document describes a proposed system for detecting transmission line breakages and alerting relevant parties. The system uses voltage sensors along transmission lines to continuously monitor voltages between sections. If a rapid voltage change is detected between two sections, a signal is sent to trip the power supply and alert the public via buzzers. Data is communicated between sections using wireless sensor networks. The system is simulated using a PIC microcontroller and results are displayed on an LCD screen and transmitted to peripherals. The goal of the system is to quickly detect broken power lines to prevent electrical accidents and power outages.
The power supply system is completely hooked into three major parts. First one is generation, second one is
transmission and the last one is distribution of electricity supply at the range of 415V to 400V approx. But while
the fault occurs it affects other lines additionally, and this causes difficulties for local people and additionally
perturb the flow of current in different areas. This eccentric and perturbed supply of nuisance is very
hazardous as it cannot be ceased when it comes to equal distribution of electricity. The area suffering from
faults and the other both get affected. So to stop all these we have implemented this project of Coordination of
over current relay utilising optimisation technique. We have utilised crow search algorithms with Kennedy as
swarm perspicacity algorithms which are very auxiliary in storing excess electricity supply and can be used
when needed. With the avail of this we can renovate the potency supply and this will conclusively implement
our main objective of this project.
Here my project theme is to monitor and control Transformer health using Arduino, as we all know there are both internal and external faults occur in the transformer, for internal faults we use Buchholz relay and Differential protection relay for external but it is not efficient with time. so,we use Arduino for real time protection, here we fix some values to the Arduino in the program itself according to the rating of the transformer by that we monitor and control whenever the faults occur
FUZZY LOGIC APPROACH FOR FAULT DIAGNOSIS OF THREE PHASE TRANSMISSION LINEJournal For Research
This document summarizes a journal article that proposes using fuzzy logic to diagnose faults on three-phase transmission lines. It begins with an abstract of the journal article, which describes using fuzzy logic as an intelligent technique to quickly and accurately identify the type of fault that occurs on a transmission system. It then provides background on transmission line faults, fault types, and challenges with transmission line protection. The document outlines the proposed fuzzy logic approach, including defining fault types as fuzzy sets and developing if-then rules to relate transmission line voltages and currents to faults. Simulation results are presented showing the fuzzy logic approach can identify different fault types based on the current responses. The conclusion is that the proposed fuzzy logic method allows for fast and reliable fault detection on transmission
IRJET- Power Quality Improvement by using Three Phase Adaptive Filter Control...IRJET Journal
This document discusses a proposed adaptive filter control system for improving power quality in a microgrid. The system contains a combination of solar PV and diesel generation connected through a voltage source converter. An adaptive filter is designed to reduce harmonic distortion levels in microgrid currents and voltages within specified limits. The adaptive filter removes harmonics from load current caused by nonlinear loads, making the current smooth and sinusoidal and reducing the total harmonic distortion according to IEEE standards. Simulation results show the adaptive filtering technique is able to reduce the total harmonic distortion to within standard levels after a fault occurs.
IRJET- Condition Monitoring and Faulty Insulator Locating using Park’s Transf...IRJET Journal
This document proposes a technique for condition monitoring and fault detection of insulators in overhead transmission lines using Park's vector transformation. Insulator faults can develop slowly over time due to environmental degradation and dust accumulation. The technique monitors phase currents from the transmission line and applies Park's transformation to generate waveform patterns based on insulator capacitance and location. Comparing the patterns to simulations allows identification of faulty insulators, their location, and the condition of different phases to enable timely maintenance and prevent major faults. The method was tested in MATLAB simulations of a three-phase transmission line model.
A Novel Multi Level Converter Unified Power – Quality (MC-UPQC) Conditioning ...IRJET Journal
This document discusses a novel multi-level converter unified power quality conditioning system (MC-UPQC) capable of simultaneously compensating for voltage and current in multi-bus/multi-feeder systems. The proposed MC-UPQC topology includes one shunt voltage-source converter and two or more series VSCs, allowing power to be transferred between feeders to compensate for sags, swells, and interruptions. Simulation results show the MC-UPQC can significantly reduce power losses, mitigate under voltages, and enhance voltage stability in distribution networks compared to other designs. The MC-UPQC provides a more efficient solution for under voltage mitigation in multi-feeder systems.
STUDY AND ANALYSIS OF PROTECTION SCHEME OF DIGITAL SUBSTATION USING IEC61850-...IAEME Publication
Substations are a fundamental part in electrical energy transmission and
distribution. The role of a substation is to transfer and transform electrical energy by
stepping up or down the voltage. To do this, high voltage switching equipment and
power transformers are used, in addition to instrument transformers that supply the
status of the primary system to the secondary equipment. Substation Automation
Systems are then used to control, protect and monitor the substations. The IEC 61850
standard developed digital substation with most advanced techniques. The IEC 61850
standard define in its sub- clauses IEC 600448 and IEC 61850-9-2 about digital
interface, digital communication and Sampled Values transmission over an Ethernet
link called Process Bus. Process Bus technology mainly developed in order to reduce
the usage of copper wiring at substation control by introducing IEC 61850-9-2 digital
interface.
IRJET- Low Cost Harmonic Measurement using Arduino UNOIRJET Journal
This document describes a low-cost system for measuring harmonics using an Arduino Uno. Harmonic measurement is important for power quality monitoring and control. The system quantizes and samples the input signal to detect total harmonic distortion using Arduino's fast Fourier transform implementation. It uses a potential divider and Arduino to build a portable device for measuring power line frequency changes and quality interference in real-time. This allows immediate detection of the power system's operational state.
TUNNELING IN HIMALAYAS WITH NATM METHOD: A SPECIAL REFERENCES TO SUNGAL TUNNE...IRJET Journal
1) The document discusses the Sungal Tunnel project in Jammu and Kashmir, India, which is being constructed using the New Austrian Tunneling Method (NATM).
2) NATM involves continuous monitoring during construction to adapt to changing ground conditions, and makes extensive use of shotcrete for temporary tunnel support.
3) The methodology section outlines the systematic geotechnical design process for tunnels according to Austrian guidelines, and describes the various steps of NATM tunnel construction including initial and secondary tunnel support.
STUDY THE EFFECT OF RESPONSE REDUCTION FACTOR ON RC FRAMED STRUCTUREIRJET Journal
This study examines the effect of response reduction factors (R factors) on reinforced concrete (RC) framed structures through nonlinear dynamic analysis. Three RC frame models with varying heights (4, 8, and 12 stories) were analyzed in ETABS software under different R factors ranging from 1 to 5. The results showed that displacement increased as the R factor decreased, indicating less linear behavior for lower R factors. Drift also decreased proportionally with increasing R factors from 1 to 5. Shear forces in the frames decreased with higher R factors. In general, R factors of 3 to 5 produced more satisfactory performance with less displacement and drift. The displacement variations between different building heights were consistent at different R factors. This study evaluated how R factors influence
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IOSR Journal of Electrical and Electronics Engineering(IOSR-JEEE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of electrical and electronics engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in electrical and electronics engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
This document discusses an adaptive protection scheme to prevent recloser-fuse miscoordination in distribution feeders with distributed generation. The presence of distributed generation can interfere with the coordination between reclosers and fuses by changing fault current levels. The proposed method adaptively modifies recloser time dial settings to address this issue. The method is tested on a simulation of an actual distribution feeder assuming different distributed generation capacities and locations. Optimization is also performed to determine the optimal location and capacity of two distributed generation units while maintaining recloser-fuse coordination and minimizing losses.
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Fault analysis in power system using power systems computer aided designIJAAS Team
This work presents a fault analysis simulation model of an IEEE 30 bus system in a distribution network. This work annalysed the effect of fault current and fault voltage in a distribution system. A circuit breaker was introduced into the system to neutralize the effect of the fault. The system was run on a PSCAD software and results were obtained. The system was monitored based on the start time and the end time of the fault and how well the circuit breaker reacts with those times. Fault occurred from 0.100 to 0.300 seconds before it was removed. At the time fault was not applied (i.e. from 0.00 to 0.100 and from 0.300 to 0.72), the circuit breaker was close and became open when fault was applied so as to cut off current flow through the line.The result obtained gave the disruption caused by the fault and the quick response of the circuit breaker in neutralizing it. Results gotten are based on when the circuit breaker is close and no fault is applied and when the circuit breaker is open due to fault. From this work, it was obtained that circuit breakers are very essential in system protection and reliability.
Microcontroller based transformer protectioAminu Bugaje
This document provides an introduction and background to a project on designing a microcontroller-based transformer protection system. It discusses how transformers are critical components in power systems that require protection against faults like short circuits, overcurrent and overvoltage. The document then reviews previous work on transformer protection and outlines the objectives of this project, which are to design current and voltage sensing circuits, develop a microcontroller algorithm for overload, overvoltage and undervoltage protection, and test the system's performance. The chapter concludes by outlining the scope and limitations of the project, which involves both hardware and software design to develop a protection system that can monitor transformer parameters and trip circuit breakers or relays during faults.
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This document discusses short circuit faults in wind energy systems and their protection challenges. It describes the components of a wind power system and classifications of wind turbines by generator type. Short circuits are one of the most common fault types and can damage equipment. Protective devices like fuses, relays, and circuit breakers are used to isolate faults. However, the variable and intermittent nature of wind power poses challenges for protection coordination and settings. Adaptive differential protection and adaptive overcurrent protection are presented as solutions to overcome these challenges. Artificial intelligence techniques may also help protect networks in the future.
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This document presents a system to detect power grid synchronization failures by sensing abnormalities in frequency and voltage. The system uses an Arduino microcontroller to monitor voltage and frequency from sensors. If the values go outside acceptable limits, it triggers a relay to disconnect the load and sends alerts by GSM and GPS. The system aims to prevent blackouts by detecting issues early and allowing time for response. It was tested using loads like lamps and successfully detected and responded to over/under voltage and frequency changes by displaying warnings on an LCD. This provides automatic grid protection while synchronizing multiple generation sources in parallel.
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This paper describes the limitations of the existing relays in the detection of fault. It also describes the benefits of using the differential pilot protection of the transmission line. Among other advantages one of its main advantages is its speed, which is required in a.c. systems to remain in synchronism (as angle δ is to be kept small). In the end of this paper a model has been created in the laboratory by using two incandescent bulbs in parallel to create the difference in the two parts of the model, this difference is detected and appropriate action is finally taken to trip the circuit.
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The power supply system is completely hooked into three major parts. First one is generation, second one is
transmission and the last one is distribution of electricity supply at the range of 415V to 400V approx. But while
the fault occurs it affects other lines additionally, and this causes difficulties for local people and additionally
perturb the flow of current in different areas. This eccentric and perturbed supply of nuisance is very
hazardous as it cannot be ceased when it comes to equal distribution of electricity. The area suffering from
faults and the other both get affected. So to stop all these we have implemented this project of Coordination of
over current relay utilising optimisation technique. We have utilised crow search algorithms with Kennedy as
swarm perspicacity algorithms which are very auxiliary in storing excess electricity supply and can be used
when needed. With the avail of this we can renovate the potency supply and this will conclusively implement
our main objective of this project.
Here my project theme is to monitor and control Transformer health using Arduino, as we all know there are both internal and external faults occur in the transformer, for internal faults we use Buchholz relay and Differential protection relay for external but it is not efficient with time. so,we use Arduino for real time protection, here we fix some values to the Arduino in the program itself according to the rating of the transformer by that we monitor and control whenever the faults occur
FUZZY LOGIC APPROACH FOR FAULT DIAGNOSIS OF THREE PHASE TRANSMISSION LINEJournal For Research
This document summarizes a journal article that proposes using fuzzy logic to diagnose faults on three-phase transmission lines. It begins with an abstract of the journal article, which describes using fuzzy logic as an intelligent technique to quickly and accurately identify the type of fault that occurs on a transmission system. It then provides background on transmission line faults, fault types, and challenges with transmission line protection. The document outlines the proposed fuzzy logic approach, including defining fault types as fuzzy sets and developing if-then rules to relate transmission line voltages and currents to faults. Simulation results are presented showing the fuzzy logic approach can identify different fault types based on the current responses. The conclusion is that the proposed fuzzy logic method allows for fast and reliable fault detection on transmission
IRJET- Power Quality Improvement by using Three Phase Adaptive Filter Control...IRJET Journal
This document discusses a proposed adaptive filter control system for improving power quality in a microgrid. The system contains a combination of solar PV and diesel generation connected through a voltage source converter. An adaptive filter is designed to reduce harmonic distortion levels in microgrid currents and voltages within specified limits. The adaptive filter removes harmonics from load current caused by nonlinear loads, making the current smooth and sinusoidal and reducing the total harmonic distortion according to IEEE standards. Simulation results show the adaptive filtering technique is able to reduce the total harmonic distortion to within standard levels after a fault occurs.
IRJET- Condition Monitoring and Faulty Insulator Locating using Park’s Transf...IRJET Journal
This document proposes a technique for condition monitoring and fault detection of insulators in overhead transmission lines using Park's vector transformation. Insulator faults can develop slowly over time due to environmental degradation and dust accumulation. The technique monitors phase currents from the transmission line and applies Park's transformation to generate waveform patterns based on insulator capacitance and location. Comparing the patterns to simulations allows identification of faulty insulators, their location, and the condition of different phases to enable timely maintenance and prevent major faults. The method was tested in MATLAB simulations of a three-phase transmission line model.
A Novel Multi Level Converter Unified Power – Quality (MC-UPQC) Conditioning ...IRJET Journal
This document discusses a novel multi-level converter unified power quality conditioning system (MC-UPQC) capable of simultaneously compensating for voltage and current in multi-bus/multi-feeder systems. The proposed MC-UPQC topology includes one shunt voltage-source converter and two or more series VSCs, allowing power to be transferred between feeders to compensate for sags, swells, and interruptions. Simulation results show the MC-UPQC can significantly reduce power losses, mitigate under voltages, and enhance voltage stability in distribution networks compared to other designs. The MC-UPQC provides a more efficient solution for under voltage mitigation in multi-feeder systems.
STUDY AND ANALYSIS OF PROTECTION SCHEME OF DIGITAL SUBSTATION USING IEC61850-...IAEME Publication
Substations are a fundamental part in electrical energy transmission and
distribution. The role of a substation is to transfer and transform electrical energy by
stepping up or down the voltage. To do this, high voltage switching equipment and
power transformers are used, in addition to instrument transformers that supply the
status of the primary system to the secondary equipment. Substation Automation
Systems are then used to control, protect and monitor the substations. The IEC 61850
standard developed digital substation with most advanced techniques. The IEC 61850
standard define in its sub- clauses IEC 600448 and IEC 61850-9-2 about digital
interface, digital communication and Sampled Values transmission over an Ethernet
link called Process Bus. Process Bus technology mainly developed in order to reduce
the usage of copper wiring at substation control by introducing IEC 61850-9-2 digital
interface.
IRJET- Low Cost Harmonic Measurement using Arduino UNOIRJET Journal
This document describes a low-cost system for measuring harmonics using an Arduino Uno. Harmonic measurement is important for power quality monitoring and control. The system quantizes and samples the input signal to detect total harmonic distortion using Arduino's fast Fourier transform implementation. It uses a potential divider and Arduino to build a portable device for measuring power line frequency changes and quality interference in real-time. This allows immediate detection of the power system's operational state.
Similar to Review on Different Techniques for Differential Protection of Power Transformer (20)
TUNNELING IN HIMALAYAS WITH NATM METHOD: A SPECIAL REFERENCES TO SUNGAL TUNNE...IRJET Journal
1) The document discusses the Sungal Tunnel project in Jammu and Kashmir, India, which is being constructed using the New Austrian Tunneling Method (NATM).
2) NATM involves continuous monitoring during construction to adapt to changing ground conditions, and makes extensive use of shotcrete for temporary tunnel support.
3) The methodology section outlines the systematic geotechnical design process for tunnels according to Austrian guidelines, and describes the various steps of NATM tunnel construction including initial and secondary tunnel support.
STUDY THE EFFECT OF RESPONSE REDUCTION FACTOR ON RC FRAMED STRUCTUREIRJET Journal
This study examines the effect of response reduction factors (R factors) on reinforced concrete (RC) framed structures through nonlinear dynamic analysis. Three RC frame models with varying heights (4, 8, and 12 stories) were analyzed in ETABS software under different R factors ranging from 1 to 5. The results showed that displacement increased as the R factor decreased, indicating less linear behavior for lower R factors. Drift also decreased proportionally with increasing R factors from 1 to 5. Shear forces in the frames decreased with higher R factors. In general, R factors of 3 to 5 produced more satisfactory performance with less displacement and drift. The displacement variations between different building heights were consistent at different R factors. This study evaluated how R factors influence
A COMPARATIVE ANALYSIS OF RCC ELEMENT OF SLAB WITH STARK STEEL (HYSD STEEL) A...IRJET Journal
This study compares the use of Stark Steel and TMT Steel as reinforcement materials in a two-way reinforced concrete slab. Mechanical testing is conducted to determine the tensile strength, yield strength, and other properties of each material. A two-way slab design adhering to codes and standards is executed with both materials. The performance is analyzed in terms of deflection, stability under loads, and displacement. Cost analyses accounting for material, durability, maintenance, and life cycle costs are also conducted. The findings provide insights into the economic and structural implications of each material for reinforcement selection and recommendations on the most suitable material based on the analysis.
Effect of Camber and Angles of Attack on Airfoil CharacteristicsIRJET Journal
This document discusses a study analyzing the effect of camber, position of camber, and angle of attack on the aerodynamic characteristics of airfoils. Sixteen modified asymmetric NACA airfoils were analyzed using computational fluid dynamics (CFD) by varying the camber, camber position, and angle of attack. The results showed the relationship between these parameters and the lift coefficient, drag coefficient, and lift to drag ratio. This provides insight into how changes in airfoil geometry impact aerodynamic performance.
A Review on the Progress and Challenges of Aluminum-Based Metal Matrix Compos...IRJET Journal
This document reviews the progress and challenges of aluminum-based metal matrix composites (MMCs), focusing on their fabrication processes and applications. It discusses how various aluminum MMCs have been developed using reinforcements like borides, carbides, oxides, and nitrides to improve mechanical and wear properties. These composites have gained prominence for their lightweight, high-strength and corrosion resistance properties. The document also examines recent advancements in fabrication techniques for aluminum MMCs and their growing applications in industries such as aerospace and automotive. However, it notes that challenges remain around issues like improper mixing of reinforcements and reducing reinforcement agglomeration.
Dynamic Urban Transit Optimization: A Graph Neural Network Approach for Real-...IRJET Journal
This document discusses research on using graph neural networks (GNNs) for dynamic optimization of public transportation networks in real-time. GNNs represent transit networks as graphs with nodes as stops and edges as connections. The GNN model aims to optimize networks using real-time data on vehicle locations, arrival times, and passenger loads. This helps increase mobility, decrease traffic, and improve efficiency. The system continuously trains and infers to adapt to changing transit conditions, providing decision support tools. While research has focused on performance, more work is needed on security, socio-economic impacts, contextual generalization of models, continuous learning approaches, and effective real-time visualization.
Structural Analysis and Design of Multi-Storey Symmetric and Asymmetric Shape...IRJET Journal
This document summarizes a research project that aims to compare the structural performance of conventional slab and grid slab systems in multi-story buildings using ETABS software. The study will analyze both symmetric and asymmetric building models under various loading conditions. Parameters like deflections, moments, shears, and stresses will be examined to evaluate the structural effectiveness of each slab type. The results will provide insights into the comparative behavior of conventional and grid slabs to help engineers and architects select appropriate slab systems based on building layouts and design requirements.
A Review of “Seismic Response of RC Structures Having Plan and Vertical Irreg...IRJET Journal
This document summarizes and reviews a research paper on the seismic response of reinforced concrete (RC) structures with plan and vertical irregularities, with and without infill walls. It discusses how infill walls can improve or reduce the seismic performance of RC buildings, depending on factors like wall layout, height distribution, connection to the frame, and relative stiffness of walls and frames. The reviewed research paper analyzes the behavior of infill walls, effects of vertical irregularities, and seismic performance of high-rise structures under linear static and dynamic analysis. It studies response characteristics like story drift, deflection and shear. The document also provides literature on similar research investigating the effects of infill walls, soft stories, plan irregularities, and different
This document provides a review of machine learning techniques used in Advanced Driver Assistance Systems (ADAS). It begins with an abstract that summarizes key applications of machine learning in ADAS, including object detection, recognition, and decision-making. The introduction discusses the integration of machine learning in ADAS and how it is transforming vehicle safety. The literature review then examines several research papers on topics like lightweight deep learning models for object detection and lane detection models using image processing. It concludes by discussing challenges and opportunities in the field, such as improving algorithm robustness and adaptability.
Long Term Trend Analysis of Precipitation and Temperature for Asosa district,...IRJET Journal
The document analyzes temperature and precipitation trends in Asosa District, Benishangul Gumuz Region, Ethiopia from 1993 to 2022 based on data from the local meteorological station. The results show:
1) The average maximum and minimum annual temperatures have generally decreased over time, with maximum temperatures decreasing by a factor of -0.0341 and minimum by -0.0152.
2) Mann-Kendall tests found the decreasing temperature trends to be statistically significant for annual maximum temperatures but not for annual minimum temperatures.
3) Annual precipitation in Asosa District showed a statistically significant increasing trend.
The conclusions recommend development planners account for rising summer precipitation and declining temperatures in
P.E.B. Framed Structure Design and Analysis Using STAAD ProIRJET Journal
This document discusses the design and analysis of pre-engineered building (PEB) framed structures using STAAD Pro software. It provides an overview of PEBs, including that they are designed off-site with building trusses and beams produced in a factory. STAAD Pro is identified as a key tool for modeling, analyzing, and designing PEBs to ensure their performance and safety under various load scenarios. The document outlines modeling structural parts in STAAD Pro, evaluating structural reactions, assigning loads, and following international design codes and standards. In summary, STAAD Pro is used to design and analyze PEB framed structures to ensure safety and code compliance.
A Review on Innovative Fiber Integration for Enhanced Reinforcement of Concre...IRJET Journal
This document provides a review of research on innovative fiber integration methods for reinforcing concrete structures. It discusses studies that have explored using carbon fiber reinforced polymer (CFRP) composites with recycled plastic aggregates to develop more sustainable strengthening techniques. It also examines using ultra-high performance fiber reinforced concrete to improve shear strength in beams. Additional topics covered include the dynamic responses of FRP-strengthened beams under static and impact loads, and the performance of preloaded CFRP-strengthened fiber reinforced concrete beams. The review highlights the potential of fiber composites to enable more sustainable and resilient construction practices.
Survey Paper on Cloud-Based Secured Healthcare SystemIRJET Journal
This document summarizes a survey on securing patient healthcare data in cloud-based systems. It discusses using technologies like facial recognition, smart cards, and cloud computing combined with strong encryption to securely store patient data. The survey found that healthcare professionals believe digitizing patient records and storing them in a centralized cloud system would improve access during emergencies and enable more efficient care compared to paper-based systems. However, ensuring privacy and security of patient data is paramount as healthcare incorporates these digital technologies.
Review on studies and research on widening of existing concrete bridgesIRJET Journal
This document summarizes several studies that have been conducted on widening existing concrete bridges. It describes a study from China that examined load distribution factors for a bridge widened with composite steel-concrete girders. It also outlines challenges and solutions for widening a bridge in the UAE, including replacing bearings and stitching the new and existing structures. Additionally, it discusses two bridge widening projects in New Zealand that involved adding precast beams and stitching to connect structures. Finally, safety measures and challenges for strengthening a historic bridge in Switzerland under live traffic are presented.
React based fullstack edtech web applicationIRJET Journal
The document describes the architecture of an educational technology web application built using the MERN stack. It discusses the frontend developed with ReactJS, backend with NodeJS and ExpressJS, and MongoDB database. The frontend provides dynamic user interfaces, while the backend offers APIs for authentication, course management, and other functions. MongoDB enables flexible data storage. The architecture aims to provide a scalable, responsive platform for online learning.
A Comprehensive Review of Integrating IoT and Blockchain Technologies in the ...IRJET Journal
This paper proposes integrating Internet of Things (IoT) and blockchain technologies to help implement objectives of India's National Education Policy (NEP) in the education sector. The paper discusses how blockchain could be used for secure student data management, credential verification, and decentralized learning platforms. IoT devices could create smart classrooms, automate attendance tracking, and enable real-time monitoring. Blockchain would ensure integrity of exam processes and resource allocation, while smart contracts automate agreements. The paper argues this integration has potential to revolutionize education by making it more secure, transparent and efficient, in alignment with NEP goals. However, challenges like infrastructure needs, data privacy, and collaborative efforts are also discussed.
A REVIEW ON THE PERFORMANCE OF COCONUT FIBRE REINFORCED CONCRETE.IRJET Journal
This document provides a review of research on the performance of coconut fibre reinforced concrete. It summarizes several studies that tested different volume fractions and lengths of coconut fibres in concrete mixtures with varying compressive strengths. The studies found that coconut fibre improved properties like tensile strength, toughness, crack resistance, and spalling resistance compared to plain concrete. Volume fractions of 2-5% and fibre lengths of 20-50mm produced the best results. The document concludes that using a 4-5% volume fraction of coconut fibres 30-40mm in length with M30-M60 grade concrete would provide benefits based on previous research.
Optimizing Business Management Process Workflows: The Dynamic Influence of Mi...IRJET Journal
The document discusses optimizing business management processes through automation using Microsoft Power Automate and artificial intelligence. It provides an overview of Power Automate's key components and features for automating workflows across various apps and services. The document then presents several scenarios applying automation solutions to common business processes like data entry, monitoring, HR, finance, customer support, and more. It estimates the potential time and cost savings from implementing automation for each scenario. Finally, the conclusion emphasizes the transformative impact of AI and automation tools on business processes and the need for ongoing optimization.
Multistoried and Multi Bay Steel Building Frame by using Seismic DesignIRJET Journal
The document describes the seismic design of a G+5 steel building frame located in Roorkee, India according to Indian codes IS 1893-2002 and IS 800. The frame was analyzed using the equivalent static load method and response spectrum method, and its response in terms of displacements and shear forces were compared. Based on the analysis, the frame was designed as a seismic-resistant steel structure according to IS 800:2007. The software STAAD Pro was used for the analysis and design.
Cost Optimization of Construction Using Plastic Waste as a Sustainable Constr...IRJET Journal
This research paper explores using plastic waste as a sustainable and cost-effective construction material. The study focuses on manufacturing pavers and bricks using recycled plastic and partially replacing concrete with plastic alternatives. Initial results found that pavers and bricks made from recycled plastic demonstrate comparable strength and durability to traditional materials while providing environmental and cost benefits. Additionally, preliminary research indicates incorporating plastic waste as a partial concrete replacement significantly reduces construction costs without compromising structural integrity. The outcomes suggest adopting plastic waste in construction can address plastic pollution while optimizing costs, promoting more sustainable building practices.
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Data Communication and Computer Networks Management System Project Report.pdfKamal Acharya
Networking is a telecommunications network that allows computers to exchange data. In
computer networks, networked computing devices pass data to each other along data
connections. Data is transferred in the form of packets. The connections between nodes are
established using either cable media or wireless media.
This is an overview of my current metallic design and engineering knowledge base built up over my professional career and two MSc degrees : - MSc in Advanced Manufacturing Technology University of Portsmouth graduated 1st May 1998, and MSc in Aircraft Engineering Cranfield University graduated 8th June 2007.
Cricket management system ptoject report.pdfKamal Acharya
The aim of this project is to provide the complete information of the National and
International statistics. The information is available country wise and player wise. By
entering the data of eachmatch, we can get all type of reports instantly, which will be
useful to call back history of each player. Also the team performance in each match can
be obtained. We can get a report on number of matches, wins and lost.