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Fault Location of Distribution Network Based on Traveling Wave Head Inversion 认领 引用
1
作者 Guanghua He Jinlong Qi +4 位作者 Yao Feng Jiayi Han Heng Chen Baoming Huang Jiangtao Li 《Energy Engineering》 EI 2026年第6期270-291,共22页
The identification of the traveling wave head is an important factor affecting the accuracy of fault traveling wave positioning.In practice,in addition to the attenuation of traveling wave amplitude and rising speed c... The identification of the traveling wave head is an important factor affecting the accuracy of fault traveling wave positioning.In practice,in addition to the attenuation of traveling wave amplitude and rising speed caused by distribution line factors,various traveling wave sensors can also cause transmission distortion of high-frequency traveling wave signals,which in turn affects the calibration of traveling wave arrival time and the accuracy of fault distance measurement.The inversion technology of sensor transmission characteristics using analytical methods has limited ability to reflect factors such as stray capacitance and sensor differences.In comparison,data-driven artificial intelligence modeling inversion technology can better capture the details of sensor transmission characteristics and help improve positioning accuracy.Regarding this issue,a fault location method for distribution lines based on initial traveling wave head inversion is proposed in this paper.Firstly,the mechanism of fault traveling wave propagation distortion,including distribution lines and sensor factors,was analyzed.Furthermore,a traveling wave head inversion method based on a one-dimensional convolutional neural network was proposed.This method constructs an inversion model by training the detail coefficients of the primary and secondary traveling wave heads of the sensor after the wavelet transform as samples.Based on the training model,the wavelet detail coefficients of the secondary side wave after the fault occurs are inverted into the corresponding primary side coefficients,and the arrival time of the wave head is accurately extracted through the wavelet modulus maximum method,thereby improving the positioning accuracy of the double-ended traveling wave method.Experiments show that the average location error of this method does not exceed 2.2%under various fault conditions with a sampling rate of 1 MHz,and demonstrating the robustness and reliability of this method in complex fault scenarios. 展开更多
关键词 Traveling wave fault location inversion of traveling wave head convolutional neural network voltage sensor wavelet transform
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Research on Fault Location and Isolation Method of Power Distribution System Based on Intelligent Sensing 认领 引用
2
作者 Yichi Zhang 《Journal of Electronic Research and Application》 2026年第3期94-100,共7页
Fault location and isolation in the power distribution system are the core links to ensure the reliability of power supply,and the traditional methods have problems such as insufficient positioning accuracy and slow i... Fault location and isolation in the power distribution system are the core links to ensure the reliability of power supply,and the traditional methods have problems such as insufficient positioning accuracy and slow isolation response in complex power grid structures.The introduction of intelligent sensing technology provides a new path for distribution network fault handling,and with the help of multi-source sensor data collection and deep integration of machine learning algorithms,the goal of accurate capture and rapid research and judgment of fault signals can be achieved.At the fault location level,a technical system including signal feature extraction,type recognition,multi-terminal fusion and single-phase grounding high-sensitivity positioning is constructed,and at the isolation level,adaptive criterion and distributed collaborative isolation scheme are proposed,which combines network reconstruction and multi-level protection coordination to improve power supply reliability.The simulation results show that the proposed method has better positioning accuracy and isolation speed,and has strong practical value in engineering applications. 展开更多
关键词 Intelligent perception Fault location Fault isolation Feeder automation Power distribution system
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A Fault Location Method of Multi-Branch Distribution Line Based on MODWT Combined with Improved TEO 认领 引用
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作者 Pan Duan Enze Peng 《Energy Engineering》 EI 2025年第9期3817-3838,共22页
To address the challenges of fault line identification and low detection accuracy of wave head in Fault Location(FL)research of distribution networks with complex topologies,this paper proposes an FL method of Multi-B... To address the challenges of fault line identification and low detection accuracy of wave head in Fault Location(FL)research of distribution networks with complex topologies,this paper proposes an FL method of Multi-Branch distribution line based on Maximal Overlap Discrete Wavelet Transform(MODWT)combined with the improved Teager Energy Operator(TEO).Firstly,the current and voltage Traveling Wave(TW)signals at the head of each line are extracted,and the fault-induced components are obtained to determine the fault line by analyzing the polarity of the mutation amount of fault voltage and current TWs.Subsequently,the fault discrimination mark is calculated based on the fault-induced line-mode current and the zero-mode voltage,with the fault type determined by comparing each mark’s value against the fault discrimination table,transforming the FL problem in complex topology into a single-line FL problem.Finally,the fault voltage TW is extracted fromthe fault line,and the wave head detection method based on MODWT combined with improved TEO is used to precisely identify the arrival instants of both the first TW wave head and its first reflection at each line terminal,and then the FL result is calculated by applying the double-ended TW ranging formula that removes the influence of wave velocity.Simulation results demonstrate that the proposed method accurately identifies the fault line and types of faults occurring and maintains the ranging accuracy within 0.5%under various fault scenarios. 展开更多
关键词 Multi-branch line fault location(FL) traveling wave(TW) maximum overlapping discrete wavelet transform(MODWT) teager energy operator(TEO)
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A photovoltaic array DC arc fault location method integrating MKDANN and SPA 认领 引用
4
作者 Chenye Huang Wei Gao +1 位作者 Chenhao Huang Liangshi Lin 《Global Energy Interconnection》 EI CSCD 2025年第5期760-777,共18页
This paper proposes a fingerprint matching method integrating transfer learning and online learning to tackle the challenges of environmental adaptability and dynamic interference resistance in photovoltaic(PV)array D... This paper proposes a fingerprint matching method integrating transfer learning and online learning to tackle the challenges of environmental adaptability and dynamic interference resistance in photovoltaic(PV)array DC arc fault location methods based on electromagnetic radiation(EMR)signals.Initially,a comprehensive analysis of the time–frequency characteristics of series arc EMR signals is carried out to pinpoint effective data sources that reflect fault features.Subsequently,a multi-kernel domain-adversarial neural network(MKDANN)is introduced to extract domain-invariant features,and a feature extractor designed specifically for fingerprint matching is devised.To reduce inter-domain distribution differences,a multi-kernel maximum mean discrepancy(MK-MMD)is integrated into the adaptation layer.Moreover,to deal with dynamic environmental changes in real-world situations,the support-class passive aggressive(SPA)algorithm is utilized to adjust model parameters in real time.Finally,MKDANN and SPA technologies are smoothly combined to build a fully operational fault location model.Experimental results indicate that the proposed method attains an overall fault location accuracy of at least 95%,showing strong adaptability to environmental changes and robust interference resistance while maintaining excellent online learning capabilities during model migration. 展开更多
关键词 Photovoltaic array Arc fault location Support-class passive aggressive Multi-kernel maximum mean discrepancy Fingerprint matching
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Modern Travelling Wave Based Fault Location Techniques for HVDC Transmission Lines 认领 引用 被引量：10
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作者 陈平 徐丙垠 +1 位作者 李京 葛耀中 《Transactions of Tianjin University》 EI CAS 2008年第2期139-143,共5页
The modern travelling wave based fault location principles for transmission lines are analyzed.In order to apply the travelling wave principles to HVDC transmission lines,the special technical problems are studied.Bas... The modern travelling wave based fault location principles for transmission lines are analyzed.In order to apply the travelling wave principles to HVDC transmission lines,the special technical problems are studied.Based on this,a fault locating system for HVDC transmission lines is developed.The system can support modern double ended and single ended travelling wave princi- ples simultaneously,and it is composed of three different parts:travelling wave data acquisition and processing system,communication network and PC based master station.In the system,the fault generated transients are induced from the ground leads of the over-voltage suppression capacitors of an HVDC line through specially developed travelling wave couplers.The system was applied to 500 kV Gezhouba-Nanqiao(Shanghai)HVDC transmission line in China.Some field operation experiences are summarized,showing that the system has very high reliability and accuracy,and the maximum location error is about 3 km(not more than 0.3%of the total line length). Obviously,the application of the system is successful,and the fault location problem has finally been solved completely since the line operation. 展开更多
关键词 fault location global positioning system HVDC transmission lines repeaters
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Fault Location Identification for Localized Intermittent Connection Problems on CAN Networks 认领 引用 被引量：3
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作者 LEI Yong YUAN Yong SUN Yichao 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2014年第5期1038-1046,共9页
The intermittent connection（IC）of the field-bus in networked manufacturing systems is a common but hard troubleshooting network problem,which may result in system level failures or safety issues.However,there is no ... The intermittent connection（IC）of the field-bus in networked manufacturing systems is a common but hard troubleshooting network problem,which may result in system level failures or safety issues.However,there is no online IC location identification method available to detect and locate the position of the problem.To tackle this problem,a novel model based online fault location identification method for localized IC problem is proposed.First,the error event patterns are identified and classified according to different node sources in each error frame.Then generalized zero inflated Poisson process（GZIP）model for each node is established by using time stamped error event sequence.Finally,the location of the IC fault is determined by testing whether the parameters of the fitted stochastic model is statistically significant or not using the confident intervals of the estimated parameters.To illustrate the proposed method,case studies are conducted on a 3-node controller area network（CAN）test-bed,in which IC induced faults are imposed on a network drop cable using computer controlled on-off switches.The experimental results show the parameters of the GZIP model for the problematic node are statistically significant（larger than 0）,and the patterns of the confident intervals of the estimated parameters are directly linked to the problematic node,which agrees with the experimental setup.The proposed online IC location identification method can successfully identify the location of the drop cable on which IC faults occurs on the CAN network. 展开更多
关键词 CAN network fault location identification GZIP model intermittent connection
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T-Shaped Transmission Line Fault Location Based on Phase-Angle Jump Checking 认领 引用 被引量：1
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作者 Jia’an Xie YurongWang +1 位作者 Guobin Jin Mucheng Wu 《Energy Engineering》 EI 2022年第5期1797-1809,共13页
In order to effectively solve the dead-zone and low-precision of T-shaped transmission line fault location,a new T-shaped transmission line fault location algorithm based on phase-angle jump checking is proposed in th... In order to effectively solve the dead-zone and low-precision of T-shaped transmission line fault location,a new T-shaped transmission line fault location algorithm based on phase-angle jump checking is proposed in this paper.Firstly,the 3-terminal synchronous fundamental positive sequence voltage and current phasors are extracted and substituted into the fault branch distance function to realize the selection of fault branch when the fault occurs;Secondly,use the condition of the fundamental positive sequence voltage phasor at the fault point is equal to calculate all roots(including real root and virtual roots);Finally,the phase-angle jump check function is used for checking calculation,and then the only real root can be determined as the actual fault distance,thereby achieving the purpose of high-precision fault location.MATLAB simulation results show that the proposed new algorithm is feasible and effective with high fault location accuracy and good versatility. 展开更多
关键词 T-shaped transmission line fault location real root and virtual roots phase-angle jump check function
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Accurate Fault Location Modeling for Parallel Transmission Lines Considering Mutual Effect 认领 引用 被引量：1
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作者 Hamdy A.Ziedan Hegazy Rezk Mujahed Al-Dhaifallah 《Computers, Materials & Continua》 SCIE EI 2021年第4期491-518,共28页
:A new accurate algorithms based on mathematical modeling of two parallel transmissions lines system(TPTLS)as influenced by the mutual effect to determine the fault location is discussed in this work.The distance rela... :A new accurate algorithms based on mathematical modeling of two parallel transmissions lines system(TPTLS)as influenced by the mutual effect to determine the fault location is discussed in this work.The distance relay measures the impedance to the fault location which is the positive-sequence.The principle of summation the positive-,negative-,and zero-sequence voltages which equal zero is used to determine the fault location on the TPTLS.Also,the impedance of the transmission line to the fault location is determined.These algorithms are applied to single-line-to-ground(SLG)and double-line-to-ground(DLG)faults.To detect the fault location along the transmission line,its impedance as seen by the distance relay is determined to indicate if the fault is within the relay’s reach area.TPTLS under study are fed from one-and both-ends.A schematic diagrams are obtained for the impedance relays to determine the fault location with high accuracy. 展开更多
关键词 New accurate algorithms mathematical modeling fault location scheme diagrams parallel transmission lines mutual effect SLG and DLG faults
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Research on Asymmetric Fault Location of Wind Farm Collection System Based on Compressed Sensing 认领 引用 被引量：1
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作者 Huanan Yu Gang Han +1 位作者 Hansong Luo He Wang 《Energy Engineering》 EI 2023年第9期2029-2057,共29页
Aiming at the problem that most of the cables in the power collection systemof offshore wind farms are buried deep in the seabed,whichmakes it difficult to detect faults,this paper proposes a two-step fault location m... Aiming at the problem that most of the cables in the power collection systemof offshore wind farms are buried deep in the seabed,whichmakes it difficult to detect faults,this paper proposes a two-step fault location method based on compressed sensing and ranging equation.The first step is to determine the fault zone through compressed sensing,and improve the datameasurement,dictionary design and algorithmreconstruction:Firstly,the phase-locked loop trigonometric functionmethod is used to suppress the spike phenomenon when extracting the fault voltage,so that the extracted voltage valuewillnot have a large error due to the voltage fluctuation.Secondly,theλ-NIM dictionary is designed by using the node impedancematrix and the fault location coefficient to further reduce the influence of pseudo-fault points.Finally,the CoSaMP algorithmis improved with the generalized Jaccard coefficient to improve the reconstruction accuracy.The second step is to use the ranging equation to accurately locate the asymmetric fault of the wind farm collection system on the basis of determining the fault interval.The simulation results show that the proposedmethod ismore accurate than the compressedsensingmethod andimpedancemethod in fault section location and fault location accuracy,the relative error is reduced from 0.75%to 0.4%,and has a certain anti-noise ability. 展开更多
关键词 Offshore wind farm convergence system compression sensing ranging equation fault location
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Optimal Configuration of Fault Location Measurement Points in DC Distribution Networks Based on Improved Particle Swarm Optimization Algorithm 认领 引用 被引量：1
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作者 Huanan Yu Hangyu Li +1 位作者 He Wang Shiqiang Li 《Energy Engineering》 EI 2024年第6期1535-1555,共21页
The escalating deployment of distributed power sources and random loads in DC distribution networks hasamplified the potential consequences of faults if left uncontrolled. To expedite the process of achieving an optim... The escalating deployment of distributed power sources and random loads in DC distribution networks hasamplified the potential consequences of faults if left uncontrolled. To expedite the process of achieving an optimalconfiguration of measurement points, this paper presents an optimal configuration scheme for fault locationmeasurement points in DC distribution networks based on an improved particle swarm optimization algorithm.Initially, a measurement point distribution optimization model is formulated, leveraging compressive sensing.The model aims to achieve the minimum number of measurement points while attaining the best compressivesensing reconstruction effect. It incorporates constraints from the compressive sensing algorithm and networkwide viewability. Subsequently, the traditional particle swarm algorithm is enhanced by utilizing the Haltonsequence for population initialization, generating uniformly distributed individuals. This enhancement reducesindividual search blindness and overlap probability, thereby promoting population diversity. Furthermore, anadaptive t-distribution perturbation strategy is introduced during the particle update process to enhance the globalsearch capability and search speed. The established model for the optimal configuration of measurement points issolved, and the results demonstrate the efficacy and practicality of the proposed method. The optimal configurationreduces the number of measurement points, enhances localization accuracy, and improves the convergence speedof the algorithm. These findings validate the effectiveness and utility of the proposed approach. 展开更多
关键词 Optimal allocation improved particle swarm algorithm fault location compressed sensing DC distribution network
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FAULT LOCATION ESTIMATION FOR TWO-LINE FAULT INVOLVING DIFFERENT PHASES FROM EACH OF PARALLEL LINES 认领 引用 被引量：1
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作者 张庆超 李铁 +1 位作者 张尧 宋文南 《Transactions of Tianjin University》 CAS 2001年第2期109-112,共4页
A novel numerical algorithm of fault location estimation for double line to ground fault involving different phases from each of two parallel lines is presented in this paper.It is based on the one terminal voltage an... A novel numerical algorithm of fault location estimation for double line to ground fault involving different phases from each of two parallel lines is presented in this paper.It is based on the one terminal voltage and current data.The loop and nodal equations comparing faulted phase with non faulted phase of two parallel lines are introduced in the fault location estimation models,in which the source impedance of a remote end is not involved.The effects of load flow and fault resistance on the accuracy of fault location are effectively eliminated,therefore precise algorithms of locating fault are derived.The algorithm is demonstrated by digital computer simulations. 展开更多
关键词 fault location two parallel line line line fault
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FAULT LOCATION AND RECORDING SYSTEM OF TRANSMISSION LINES BASED ON COMPUTER NETWORK 认领 引用 被引量：1
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作者 贺家李 孙雅明 贺继红 《Transactions of Tianjin University》 CAS 1997年第1期17-23,共7页
In this paper a fault location and recording system based on a computer network is presented. A brief description of the system structure and main features are given. Emphasis is placed on the accurate fault location ... In this paper a fault location and recording system based on a computer network is presented. A brief description of the system structure and main features are given. Emphasis is placed on the accurate fault location method for extra high voltage and long distance transmission lines. 展开更多
关键词 computer network fault location recording system
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Parameter identification algorithm for fault location using one terminal data based on frequency domain 认领 引用
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作者 康小宁 索南加乐 《Journal of Pharmaceutical Analysis》 CAS 2007年第1期18-23,共6页
This paper presents a novel algorithm of fault location for transmission line.Solving the network spectrum equations for different frequencies the fault can be located accurately by this algorithm with one terminal da... This paper presents a novel algorithm of fault location for transmission line.Solving the network spectrum equations for different frequencies the fault can be located accurately by this algorithm with one terminal data of voltage and current,and the identified parameters,such as fault distance, fault resistance,and opposite terminal system resistance and inductance.The algorithm eliminates the influence of the opposite system impedance on the fault location accuracy,which causes the main error in traditional fault location methods using one terminal data.A method of calculating spectrum from sampled data is also proposed.EMTP simulations show the validity and higher accuracy of the fault location algorithm compared to the existing ones based on one terminal data. 展开更多
关键词 fault location parameter identification frequency domain analysis
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Fault location of two-parallel transmission line for double phase-to-earth fault using one-terminal data 认领 引用
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作者 张庆超 段晖 +1 位作者 耿超 宋文南 《Journal of Zhejiang University Science》 2003年第5期520-525,共6页
An accurate algorithm for fault location of double phase-to-earth fault on transmission line of direct ground neutral system is presented. The algorithm, which employs the faulted phase network and zero-sequence netwo... An accurate algorithm for fault location of double phase-to-earth fault on transmission line of direct ground neutral system is presented. The algorithm, which employs the faulted phase network and zero-sequence network as fault-location model in which the source impedance at the remote end is not involved, ef-fectively eliminates the effect of load flow and fault resistance on the accuracy of fault location. The algorithm achieves accurate location by measuring only one local end data and is used in a procedure that provides automatic determination of faulted types and phases, and does not require the engineer to specify them. Simulation results showed the effectiveness of the algorithm under the condition of double phase-to-earth fault. 展开更多
关键词 Fault location Transmission line Double phas e-to-earth fault
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Fault location for parallel transmission lines using one-terminal current traveling waves 认领 引用
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作者 徐青山 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2009年第3期408-412,共5页
With proper phase module transformation,parallel lines can be decomposed to the same directional net and the reverse directional net. The propagation characteristics of traveling waves in the reverse directional net w... With proper phase module transformation,parallel lines can be decomposed to the same directional net and the reverse directional net. The propagation characteristics of traveling waves in the reverse directional net were analyzed,and the refraction coefficient at the fault point for a single phase fault was derived. In addition,the module selection was discussed. Simulation results show that satisfying accuracy can be achieved with the proposed method. Moreover,it is immune to fault types,fault resistances,and outside system parameters. 展开更多
关键词 fault location parallel transmission lines traveling wave reverse directional net
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Single Ended Fault Location Estimation for EHV Transmission Systems 认领 引用
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作者 张庆超 李晖 D.W.P.Thomas 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2004年第2期201-204,共4页
A novel numerical algorithm for fault location estimation of single-phase-to-earth fault on EHV transmission lines is presented in this paper. The method is based on one-terminal voltage and current data and is used i... A novel numerical algorithm for fault location estimation of single-phase-to-earth fault on EHV transmission lines is presented in this paper. The method is based on one-terminal voltage and current data and is used in a procedure that provides the automatic determination of faulted types and phases, rather than requires engineer to specify them. The loop and nodal equations comparing the faulted phase to non-fauhed phases of multi-parallel lines are introduced in the fauh location estimation models, in which source impedance of remote end is not involved. Precise algorithms of locating fault are derived. The effect of load flow and fauh resistance, on the location accuracy, are effectively eliminated. The algorithms are demonstrated by digital computer simulations. 展开更多
关键词 fault location estimation transmission line local power system
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Small-current grounding fault location method based on transient main resonance frequency analysis 认领 引用 被引量：4
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作者 Yongjie Zhang Xiaojun Wang +2 位作者 Junjuan Li Yin Xu Guohong Wu 《Global Energy Interconnection》 EI 2020年第4期324-334,共11页
The small-current grounding fault in distribution network is hard to be located because of its weak fault features.To accurately locate the faults,the transient process is analyzed in this paper.Through the study we t... The small-current grounding fault in distribution network is hard to be located because of its weak fault features.To accurately locate the faults,the transient process is analyzed in this paper.Through the study we take that the main resonant frequency and its corresponding component is related to the fault distance.Based on this,a fault location method based on double-end wavelet energy ratio at the scale corresponding to the main resonant frequency is proposed.And back propagation neural network(BPNN)is selected to fit the non-linear relationship between the wavelet energy ratio and fault distance.The performance of this proposed method has been verified in different scenarios of a simulation model in PSCAD/EMTDC. 展开更多
关键词 Small-current grounding fault location Main resonant frequency Double-end wavelet energy ratio Backpropagation neural network(BPNN)
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Adaptive restarting method for LCC-HVDC based on principle of fault location by current injection 认领 引用 被引量：3
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作者 Ruidong Xu Guobing Song +1 位作者 Junjie Hou Zhongxue Chang 《Global Energy Interconnection》 EI CSCD 2021年第6期554-563,共10页
The existing LCC-HVDC transmission project adopts the fixed-time delay restarting method.This method has disadvantages such as non-selectivity,long restart process,and high probability of restart failure.These issues ... The existing LCC-HVDC transmission project adopts the fixed-time delay restarting method.This method has disadvantages such as non-selectivity,long restart process,and high probability of restart failure.These issues cause a secondary impact on equipment and system power fluctuation.To solve this problem,an adaptive restarting method based on the principle of fault location by current injection is proposed.First,an additional control strategy is proposed to inject a current detection signal.Second,the propagation law of the current signal in the line is analyzed based on the distributed parameter model of transmission line.Finally,a method for identifying fault properties based on the principle of fault location is proposed.The method fully considers the influence of the long-distance transmission line with earth capacitance and overcomes the influence of the increasing effect of the opposite terminal.Simulation results show that the proposed method can accurately identify the fault properties under various complex fault conditions and subsequently realize the adaptive restarting process. 展开更多
关键词 LCC-HVDC Adaptive restarting Current signal injection Fault location Fault property identification
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Improved fault location method for AT traction power network based on EMU load test 认领 引用 被引量：1
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作者 Guosong Lin Xuguo Fu +1 位作者 Wei Quan Bin Hong 《Railway Engineering Science》 2022年第4期532-540,共9页
The autotransformer(AT)neutral current ratio method is widely used for fault location in the AT traction power network.With the development of high-speed electrified railways,a large number of data show that the relat... The autotransformer(AT)neutral current ratio method is widely used for fault location in the AT traction power network.With the development of high-speed electrified railways,a large number of data show that the relation between the AT neutral current ratio and the distance from the beginning of the fault AT section to the fault point(Q-L relation)is mostly nonlinear.Therefore,the linear Q-L relation in the traditional fault location method always leads to large errors.To solve this problem,a large number of load-related current data that can be used to describe the Q-L relation are obtained through the load test of the electric multiple unit(EMU).Thus,an improved fault location method based on the back propagation(BP)neural network is proposed in this paper.On this basis,a comparison between the improved method and the traditional method shows that the maximum absolute error and the average absolute error of the improved method are 0.651 km and 0.334 km lower than those of the traditional method,respectively,which demonstrates that the improved method can effectively eliminate the influence of nonlinear factors and greatly improve the accuracy of fault location for the AT traction power network.Finally,combined with a shortcircuit test,the accuracy of the improved method is verified. 展开更多
关键词 Fault location EMU load test BP neural network AT traction power network High-speed electrified railway
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Fault Location in Transmission Lines Using BP Neural Network Trained with PSO Algorithm 认领 引用 被引量：2
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作者 Salah Sabry Daiboun Sahel Mohamed Boudour 《Journal of Energy and Power Engineering》 CAS 2013年第3期603-611,共9页
In modem protection relays, the accurate and fast fault location is an essential task for transmission line protection from the point of service restoration and reliability. The applications of neural networks based f... In modem protection relays, the accurate and fast fault location is an essential task for transmission line protection from the point of service restoration and reliability. The applications of neural networks based fault location techniques to transmission line are available in many papers. However, almost all the studies have so far employed the FNN （feed-forward neural network） trained with back-propagation algorithm （BPNN） which has a better structure and been widely used. But there are still many drawbacks if we simply use feed-forward neural network, such as slow training rate, easy to trap into local minimum point, and bad ability on global search. In this paper, feed-forward neural network trained by PSO （particle swarm optimization） algorithm is proposed for fault location scheme in 500 kV transmission system with distributed parameters presentation, The purpose is to simulate distance protection relay. The algorithm acts as classifier which requires phasor measurements data from one end of the transmission line and DFT （discrete Fourier transform）. Extensive simulation studies carried out using MATLAB show that the proposed scheme has the ability to give a good estimation of fault location under various fault conditions. 展开更多
关键词 Transmission line protection fault location neural network back-propagation particle swarm.
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