| 脉冲注入法用于直流输电系统接地极线路故障测距 |
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| 引用本文：张怿宁,郝洪民,李京,李录照.脉冲注入法用于直流输电系统接地极线路故障测距[J].电网与清洁能源,2016,32(12):63~68 |
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| 基金项目:基金项目：南方电网云南金沙江中游电站送电广西直流输电工程专题研究项目（010000WS24130002）；南方电网超高压输电公司重点科技项目。 |
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| 中文摘要:摘要： 分析了直流输电系统在双极运行方式下，外部注入脉冲信号在接地极线路上的传播过程，提出一种利用注入脉冲信号的直流输电系统接地极线路故障测距方法。该方法通过周期性地从接地极线路始端注入脉冲信号探测线路是否发生故障，在判断线路发生故障后，通过改变注入脉冲信号的宽度和脉冲极性探测故障点位置，最后以取平均值的方式得到故障测距结果。以PSCAD/EMTDC为仿真平台，搭建了直流输电系统在双极运行方式下的接地线路故障测距仿真模型，并借助MATLAB对仿真波形数据进行分析，仿真结果表明该方法是可行的。 |
| 中文关键词:关键词： 高压直流输电 接地极线路 脉冲注入法 故障测距 |
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| Fault Location of Grounding Electrode Lines of HVDC System Based on Injected Pulse Signals |
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| Abstract:ABSTRACT： In this paper， the external injected pulse signal’s propagation process in the grounding electrode lines of high-voltage direct current（HVDC） transmission system in bipolar operation mode is analyzed. On this basis， a fault location method for grounding electrode lines is presented using injected pulse signals. This method is to detect line faults by injecting pulse signals at the beginning of the grounding electrode lines periodically. After the line fault is determined， the fault loca-tion is detected by changing the width and polarity of the injec-ted pulse signal. Finally， the fault location result is obtained in the form of the average value. On the PSCAD/EMTDC simula-tion platform， the bipolar HVDC transmission system simulation model is built for fault location analysis of grounding electrode lines built. Using MATLAB to process the simulation waveform data， it is indicated that the proposed fault location method is feasible. |
| keywords:KEY WORDS：HVDC transmission grounding electrode lines pulse injection method fault location |
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