基于电流序分量的多源配电网故障定位方法
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TM744

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本文得到四川省教育厅项目(18ZB0566)资助


Multi-source distribution network fault location method based on current sequence component
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National Natural Science Foundation of China (No. 51877181),Scientific Research Fund of Sichuan Provincial Education Department (No. 18ZB0566)

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    摘要:

    为了克服传统配电网故障定位方法对分布式电源接入的适应性较差,且需要在馈线中配置大量测量装置导致成本增加的缺点,提出了一种基于电流序分量相关系数的多源配电网故障区段定位方法。首先利用叠加法分析了多端电源配电网故障点电流特征及定位原理,然后通过电源端口测量装置获取故障前后电源输出电流幅值差,再假设不同位置发生故障并计算此时各电源输出故障电流理论值,最后利用相关分析法计算理论与实测数据的相关系数,并提取相关系数最大的2个相邻节点实现区段定位。通过ETAP电力系统仿真平台搭建改进的IEEE 33节点模型模拟测量值,利用Matlab编程进行相关分析,所得结果验证了该方法的正确性。

    Abstract:

    In order to overcome the problem that the traditional distribution network fault location method has poor adaptability to distributed power generation(DG) access, and the need to configure a large number of measuring devices in the feeder to cause cost increase, a fault location method for multi-source distribution network based on correlation coefficient of current sequence component is proposed.Firstly, the superposition method is used to analyze the current characteristics and positioning principle of the fault point of the multi-terminal power distribution network.Then, the power terminal measurement device is used to obtain the amplitude difference of the output current of the power supply before and after the fault, and then assume that the fault occurs at different positions and calculate the theoretical value of the fault current of each power supply output.Finally, the correlation analysis method is used to calculate the correlation coefficient between the theoretical and measured data, and extract the two adjacent nodes with the largest correlation coefficient to achieve segment location.The improved IEEE 33 node model simulation measurement value is built by ETAP power system simulation platform.The Matlab programming is used to analyze the correlation.The result verifies the correctness of method.

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苑吉河,张曦,黄虎,张豪,朱金龙.基于电流序分量的多源配电网故障定位方法[J].电力工程技术,2020,39(5):204-210

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  • 收稿日期:2020-03-07
  • 最后修改日期:2020-04-11
  • 录用日期:2020-02-06
  • 在线发布日期: 2020-09-30
  • 出版日期: 2020-09-28