| 引用本文: | 姜博，,董新洲,施慎行.近似熵在配电网继发性故障检测中的应用研究[J].电力系统保护与控制,2015,43(17):15-21.[点击复制] |
| JIANG Bo,DONG Xinzhou,SHI Shenxing.Application of approximate entropy to cross-country fault detection in distribution networks[J].Power System Protection and Control,2015,43(17):15-21[点击复制] |
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| 摘要: |
| 为克服中性点非有效接地系统中继发性故障检测困难的问题，提出了一种基于母线电压近似熵的中性点非有效接地配电网继发性故障检测方法。通过对母线三相电压进行近似熵计算，判断是否在计算时间窗内发生继发性故障，并进行继发性故障选相。所提方法仅需要电压信息，既能够识别不同线路同名相的继发性单相接地故障，也能够识别不同线路异名相的间歇性单相接地故障。首次故障与继发性故障之间的检测时间分辨率可达到毫秒级水平，大量基于ATP/EMTP的典型故障仿真结果验证了该判据的正确性。 |
| 关键词: 继发性故障 配电线路 中性点非有效接地 单相接地故障 近似熵 |
| DOI：10.7667/j.issn.1674-3415.2015.17.003 |
| 投稿时间：2014-11-02修订日期：2015-01-10 |
| 基金项目:国家自然科学基金重大国际合作项目(51120175001) |
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| Application of approximate entropy to cross-country fault detection in distribution networks |
| JIANG Bo,DONG Xinzhou,SHI Shenxing |
| (State Key Lab of Control and Simulation of Power Systems and Generation Equipments,
Dept of Electrical Engineering, Tsinghua University, Beijing 100084, China) |
| Abstract: |
| To cope with the detection difficulty of cross-country fault in non-effectively grounded distribution networks, a cross-country fault detection method is proposed, which is based on the approximate entropy of bus voltages. This method calculates the approximate entropy for bus three phase voltages, and detects whether a cross-country fault occurs during the time window. The cross-country faulted phase can also be detected. The proposed method only uses voltage information, which can not only detect the cross-country fault of the same phase with the primary fault, but also can detect the different phase intermittent fault as well. The time resolution of cross-country faults identification is of millisecond level. The correctness of the criterion is proved by ATP/EMTP typical fault simulation results. The proposed algorithm enriches the single line to ground fault detection techniques. |
| Key words: cross-country fault distribution line neutral non-effective grounded single phase to ground fault approximate entropy |
