Rsearch of Fault Line Selection Based on Wavelet Method and fuzzy Reasoning
The transient fault characters of single-line-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 line selecting method is proposed for single-line-to-ground fault line 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 line selecting.The simulation result shows the rauding and the feasibility of the proposed method.