珠海电网220kV及以上失灵保护回路工程分析

Analysis and research on the failure protection circuit of 220 kV and above in Zhuhai Power Grid

对珠海电网220 kV及500 kV失灵保护回路工程进行分析研究。220 kV及500 kV保护失灵保护设备包含失灵启动、失灵保护两个概念,分析了微机型失灵保护装置的功能原理,提出220 kV及500 kV失灵保护回路的设置原则、回路分析及案例说明。指出失灵保护只要在工程上接线准确、设计方案合理,就能有效地防止拒动、误动,就能快速而有选择地切除故障,同时设计接线大大简化,回路接线越来越简单,使保护的安全性、可靠性都大大地得到了提高。

In this paper, the 220 kV and 500 kV failure protection circuit engineering of Zhuhai power grid was analyzed and studied. 220 kV and 500 kV protection failure protection device contains startup failure, failure protection two concepts. This paper analyzed the function principle of microprocessor failure protection device, proposed 220 kV and 500 kV failure protection circuit setting principle, circuit analysis and case description. That failure protection as long as the engineering wiring was correct and design was reasonable, can effectively prevent tripping, misoperation, can quickly and selectively cut off the fault. Wiring design was greatly simplified, loop wiring was more and more simple, the safety and reliability of the protection were greatly improved and has practical value in engineering.