摘要
通过对一双端供电110 kV线路单线接地故障的仿真,利用小波技术分析了A站单相跳闸以及A站三相跳闸、B站单相跳闸、AB站同时单相跳闸四种可能引起的保护跳闸方式下A站1#变末屏A相电压与电流的波形特征,利用小波分解计算了信号分解重构下低频与高频部分的小波能量函数值,比较表明,小波分析所得到的能量函数能较好地识别线路故障引起站内保护跳闸的方式。
Through simulation of the single ground fault of a 110 kV dual circuit power supply, the wave characteristics of A-phrase voltage and current of A station 1# transformer tap under four circumstances under protection tripping mode caused, by A station single-phase tripping, A station threephase tripping, B station sing-phase tripping and AB station simultaneous tripping were analyzed by wavelet technology. Wavelet energy function value of low frequency and high frequency under signal decomposition and reconstruction were also decomposition and estimates. The comparison indicates that station protecting tripping mode caused by line fault can be better identified by the energy function from wavelet analysis.
出处
《电瓷避雷器》
CAS
北大核心
2010年第4期38-40,共3页
Insulators and Surge Arresters
