Based on the application status of 500 k V line dual-channel phase current differential protection,this paper analyzes and compares the strap operation and channel warning mechanisms of dual-channel phase current differential protection in the mainstream protection manufacturers in China. The improvement scheme is proposed to enhance the rationality of the warning mechanism and the convenience of operation maintenance.
【更新日期】
2015-03-24
【分类号】
TM773
【正文快照】
随着OPGW光纤通道在电力通信领域的普及,500 k V线路保护中分相电流差动由于简单可靠的原理、优秀的全线速动性和可靠的选择性等特点,得到了越来越广泛的应用,但其依赖于对线路两侧电气数据的实时对比,因此对线路保护的通道提出了很高的要求[1-3]。通过保护通道的冗余来提高保?