摘要
分析了小电流接地系统发生单相接地故障时的暂态故障特征,指出了传统小波选线方法的优点和需要改进的地方,提出了一种新型的基于小波分析和模糊推理的故障选线方法。该方法定义了小波分解后各个尺度的隶属度函数,通过模糊推理得出融合了各个尺度的故障信息的综合结果,提高选线结果的正确性。对仿真结果的分析表明了该方法的有效性和可行性。
The transient fault characters of single-hne-to-ground fault in no-direct-ground-system are analyzed. The merits and demerits of traditional wavelet methods in no-direct-ground-system are summarized. A new fault hne selecting method is proposed for single-hne-to-ground fault hne selecting. The membership functions of every scale are defined to assess the nature of every scale. Based on the membership functions, the proposed method can obtain a integrated result based on fuzzy inference, and increase the correct rate of fault hne selecting. The simulation result shows the rauding and the feasibility of the proposed method.
出处
《华中电力》
2008年第5期10-14,共5页
Central China Electric Power
关键词
小电流接地系统
故障选线
模糊推理
小波
no-direct-ground-system
fault hne selecting
fuzzy inference
wavelet
