| 基于电流变化的环状直流配电网故障定位方法 |
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| 引用本文： | 薛艳静,徐岩,程姝.基于电流变化的环状直流配电网故障定位方法[J].陕西电力,2021,0(2):76-82,98. |
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| 作者姓名： | 薛艳静 徐岩 程姝 |
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| 作者单位： | （华北电力大学 新能源电力系统国家重点实验室，河北 保定 071003） |
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| 摘 要： | 针对现有故障测距方法无法同时对单极接地故障和极间故障进行定位，以及利用电容放电阶段进行故障定位时忽略了多端换流站都会对故障点注入电流等问题，提出一种利用故障线路上的全电流分量对多端柔性直流配电网进行故障定位的方法。通过联立与故障点相邻两网孔的电压方程，从算法上解决了过渡电阻对求解故障位置的影响。在simulink中搭建6端环状模型对所提方法进行仿真，结果验证所提方法可以在发生线路故障时能快速识别故障并进行可靠定位，满足直流配电网的故障测距要求。
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| 关 键 词： | 直流配电网 故障测距 网孔分析 电流变化率 故障判别 |
Fault Location Method of Ring DC Distribution Network Based Current Variation |
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| XUE Yanjing,XU Yan,CHENG Shu.Fault Location Method of Ring DC Distribution Network Based Current Variation[J].Shanxi Electric Power,2021,0(2):76-82,98. |
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| Authors: | XUE Yanjing XU Yan CHENG Shu |
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| Affiliation: | （Nationality State Key Laboratory of New Energy and Electric Power Systems， North China Electric Power University，Baoding 071003，China） |
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| Abstract: | Existing fault location methods cannot locate the pole-to-ground fault and pole-to-pole fault at the same time， and the effect of multi-terminal converter stations on the injected current at the fault point is often ignored when locating the fault during capacitor discharge. To this end， this paper proposes a fault location method for multi-terminal flexible DC distribution network based on the full current component on the faulty line. The influence of transition resistance on the solution of the fault location is solved algorithmically by combining the voltage equations of the two meshes adjacent to the fault point. A 6-terminal ring flexible DC distribution network model is built in Simulink to make simulation， and the results show that the method can fast identify and reliably locate the fault when a line fault occurs，meeting the fault location requirements for DC distribution networks. |
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| Keywords: | DC distribution network fault location mesh analysis current change rate fault discrimination |
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