双通道线路纵联保护应用情况分析及评价指标

摘要

线路纵联保护对通道依赖性较高,通道的运行情况直接影响保护的动作效果,进而影响电网的安全稳定运行.从双通道线路纵联保护的原理入手,分析不同实现方式的优缺点,详细对比了国内外主流保护厂家生产该类装置的实现方式,介绍了双通道线路纵联保护在国内两大电网公司的应用情况,在此基础上提出了适用于双通道纵联线路保护的分析评价指标.通过配置冗余保护通道,双通道线路纵联保护的可靠性更高,建议加大双通道线路纵联保护在500 kV及以上电压等级系统的推广使用力度,并对其配置及运行情况进行科学合理的评价,及时发现运行过程中存在的薄弱环节,确保电网的安全稳定运行.%The channel operation condition directly affects the action of line protection, thereby affecting the safe and stable operation of power grids. Starting with the principle of dual channel line protection, analyzing the advantages of dual channel line protection device, the devices made by several main manufacturers of home and abroad is compared in detail. This study also introduces the application of dual channel line protection in the two major power grids in China, and proposes several evaluation indexes of the dual channel line protection. It is suggested to increase the use of dual channel line protection in 500 kV and above voltage system, and make a scientific and reasonable evaluation of their configuration and operation. The purpose is to find out the weakness in the operation process and ensure the safety and stability of the power grids.