Because the traditional short-circuit fault rapid identification method relies on the threshold detection or feature extraction of the sensor data to judge the occurrence of the fault,the identification accuracy and efficiency are low.Therefore,the fault identification technology based on current waveform curvature is proposed.This method analyzes the feature extraction and curvature calculation of the current waveform,quickly identifies the distribution line faults according to the current waveform curve,and obtains the transient fault impedance characteristics and permanent fault impedance characteristics through the equivalent network analysis.The experimental results show that in the 6th s,the proposed distribution line fault analysis method successfully identified the fault fluctuation of voltage,current and resistance.The fault identification time is always less than 10s,and the longest time is only 8s,indicating the utility of the proposed method.
关键词
电流波形曲率/配电线路故障/等值网络/故障识别
Key words
Curvature of current waveform/distribution line fault/equivalent network/fault identification
维普
万方数据