摘要
讨论了一种基于证据理论的小电流综合选线方法,该方法主要利用当系统发生小电流接地时提取的信号进行比幅比相法、小波法、首半波法等方法进行连续的计算和判断,通过证据合成规则进行信息融合,最终判断故障所在的线路,大大提高了选线的准确度,内嵌此选线方法的小电流选线装置在北京市电力公司试运行一段时间后证明此选线方法有效。
One earth fault protection method based on evidence theory in non-solidly earthed network was discussed. signals were extracting for continuous calculating and judging when non-solidly earthed fault occurred in power sys- tem using magnitude and phase comparison method, wavelet method and first half wave method, and through evidence combination rules for information fusion, the earth fault line was found. This method could greatly improve the action accuracy of protection and operation of protection devices in Beijing Power Supply Company its effect has been proved.
出处
《华北电力技术》
CAS
2014年第3期34-37,50,共5页
North China Electric Power
关键词
小电流接地选线
证据理论
信息融合
earth fault protection in non-solidly earthed netWork
evidence theory
information fusion
