赵 鹏, 刘智昱, 王炳革. 基于模糊集理论的小电流接地系统单相故障多判据定位研究[J]. 现代电力, 2010, 27(6): 21-25.
引用本文: 赵 鹏, 刘智昱, 王炳革. 基于模糊集理论的小电流接地系统单相故障多判据定位研究[J]. 现代电力, 2010, 27(6): 21-25.
Zhao Peng, Liu Zhiyu, Wang Bingge. The Research on Multi criteria Locating Strategy for Single phase to ground Fault of Non utility Grounded System Based on the Fuzzy Theory[J]. Modern Electric Power, 2010, 27(6): 21-25.
Citation: Zhao Peng, Liu Zhiyu, Wang Bingge. The Research on Multi criteria Locating Strategy for Single phase to ground Fault of Non utility Grounded System Based on the Fuzzy Theory[J]. Modern Electric Power, 2010, 27(6): 21-25.

基于模糊集理论的小电流接地系统单相故障多判据定位研究

The Research on Multi criteria Locating Strategy for Single phase to ground Fault of Non utility Grounded System Based on the Fuzzy Theory

  • 摘要: 小电流接地系统(NUGS)发生单相接地故障时接地残流小, 正确的接地故障选线是长期存在的难题, 现行采用的单一选线方法都有一定的局限性和不足, 选线可靠性不高。为了解决这一问题, 提出利用基于模糊集理论的模糊综合决策对多种选线方法进行综合和智能处理, 并且通过对变电站出线端到负荷端分支线进行多次选线, 达到对小电流接地系统单相接地故障定位的效果, 以零序电流比幅法、小波分析法和5次谐波分量法三种接地选线方法为例进行了模拟综合决策的仿真, 结果表明针对多种选线方法进行模糊综合评判的故障选线模式具有更高的可靠性。

     

    Abstract: The current caused by single phase to ground fault in NUGS is very small, and to select line correctly is a hard issue. Some proposed methods that are used to select line have their limitations and shortcomings, such as low reliability. In order to solve this problem, the fuzzy fusion decision making based on fuzzy theory is used to deal with multiple kinds of line selecting intelligently. By multi line selecting for branch line from substation to load, the single phase to ground fault in NUGS can be located. In addition, taking three kinds of line selecting modes that include amplitude comparison method for zero sequence current, wavelet analysis method and 5th harmonic component method as example, the simulation is carried out by fusion decision making. Results show that the proposed method of fuzzy data fusion from multiple line selecting has higher credibility. .

     

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