中文摘要：

在研究采用S变换提取的信号的幅频特性和相频特性基础上，提出了一种基于S变换的故障选线方法。利用S变换后电气量存各频率点的模值和相角信息，通过模值比较，找出特征频率点：通过相角比较，制定选线投亲机刹。利用特征频率点的模值来表征其相角信息的可靠性，定义了投票信心度。通过刈多个采样点的投票机制，形成了投票统计图。利用仙农模糊熵定义选线信心度，通过选线信心度对投票统计剀进行融合，在选出故障馈线的同时，给出选线信心度。仿真结果表明，提出的方法选线正确率高，选线信心度的定义合理。

英文摘要：

Based on studying the amplitude-frequency and phase-frequency characteristic obtained from S-transform, a fault line identification approach was proposed. Through applying the modulus and phase information of electric components at each frequency point obtained from S-transform, the characteristic frequency points were found by modulus comparison, and the fault line vote mechanism was constructed by phase comparison. Through utilizing the modulus information to reflect the reliability of phase information, the vote confidence degree was defined. Through multi-sampling-points vote mechanism, the vote statistic diagram was formed. The vote statistic diagram was calculated by fault line identification confidence degree （FLICD）, which was defined by Shannon fuzzy entropy. The vote statistic diagram was integrated by FLICD. Simulation results show that the proposed approach has high accuracy and the FLICD is defined reasonably.