智能变电站同杆双回线保护功能优化的探讨

同杆双回线的线路保护一般按单回线路独立配置,在保证可靠性的同时,往往牺牲了保护灵敏度。文中在同杆双回线保护按单回线路独立配置的原则下,通过站内通信网络共享两回线路的交流量和开关量信息,提出了双回线路保护性能优化的具体方法,为双回线跨线故障选相、零序互感影响、故障测距、距离保护等提供了新的解决思路。

Discussion on Protection Optimization for Double Circuit Lines on the Same Tower in Smart Substation

Line protection of double circuit lines on the same tower are generally designed with only considering each independent single line. This kind of design scarifies protection＇s sensitivity for ensuring its reliability Based on the principle of independent configuration, the paper proposes an approach t is proposed to optimize the performance of protection for both double circuit lines with sharing the information of two lines through the station communication network. The proposed approach provides solutions for double loop cross line fault phase selection, analyzing the influence of zero sequence mutual inductance, fault distance measurement and distance protection.