| 引用本文: | 崔柳,李书勇,郭琦,黄立滨.行波故障定位装置闭锁策略探讨[J].电力系统保护与控制,2019,47(5):129-137.[点击复制] |
| CUI Liu,LI Shuyong,GUO Qi,HUANG Libin.Study on blocking algorithm of traveling wave fault location[J].Power System Protection and Control,2019,47(5):129-137[点击复制] |
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| 摘要: |
| 为了得到合适的双端行波故障定位算法闭锁策略，使其能够屏蔽后续折反射波头的同时尽快开放测距算法，对行波在线路上的折反射进行了分析。分析了各种波阻抗不连续点处的电流折反射系数，计算出区内故障、正向区外故障、反向区外故障情况下的后续折反射波头与故障初始波头的时间-幅值关系。给出了一种合理的闭锁策略:在故障发生后5 ms内闭锁故障测距，5~40 ms内闭锁大于故障初始波头60%的波头，40 ms之后开放故障测距。通过最后的EMTP仿真分析证明了该闭锁策略的有效性。 |
| 关键词: 行波 故障定位 闭锁策略 |
| DOI：10.7667/PSPC180339 |
| 投稿时间：2018-03-28修订日期：2018-08-07 |
| 基金项目:中国南方电网重点科技项目资助“行波测距高精度数字仿真实验研究平台开发”(KYKJXM00000006) |
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| Study on blocking algorithm of traveling wave fault location |
| CUI Liu,LI Shuyong,GUO Qi,HUANG Libin |
| (State Key Laboratory of HVDC, China Southern Power Grid Electric Power Research Institute, Guangzhou 510663, China;CSG Key Laboratory for Power System Simulation, China Southern Power Grid Electric Power Research Institute, Guangzhou 510663, China) |
| Abstract: |
| In order to obtain an appropriate blocking algorithm of double terminal travelling wave fault location, so that it can block the subsequent catadioptric wave and open the fault location algorithm as soon as possible, this paper analyzes the refraction and reflection of the traveling wave on the line. It analyzes all kinds of the current reflection and refraction coefficients at surge impedance discontinuous point, and calculates the time-amplitude relationship between the initial wave front and the subsequent catadioptric wave front in the internal fault, forward external fault and reverse external fault. It provides an appropriate blocking algorithm:block the fault location in 5 ms after fault occurring, block the wave front that greater than 60% initial wave front in 5~40 ms, and open fault location after 40 ms. At last, the EMTP simulation proves the effectiveness of the blocking algorithm. This work is supported by Key Technology Project of China Southern Power Grid “Development of High Precision Digital Simulation Experiment Research Platform for Traveling Wave Fault Location” (No. KYKJXM00000006). |
| Key words: traveling wave fault location blocking algorithm |
