110 kV线路拒动故障分析及解决措施

四川省德阳地区110 kV电网是以一个220 kV变电站为电源中心呈辐射状向各负荷变电站供电的运行方式，通过对220 kV变电站110 kV出线采用双回线并列运行且分别运行在两段母线上，当110 kV单回线路发生故障时线路开关或线路保护拒动的分析，得出了220 kV变电站110 kV母线将发生电网大面积停电事故的结论，提出了采用改变电网运行方式消除外挂母联和调整保护方案（采用事故发生后以一较短时限先跳开220 kV变电站110 kV母联开关，再跳双回线路负荷侧开关的保护时限配合原则，保证故障母线与非故障母线隔离）两种解决措施，均可避免发生220 kV变电站110 kV母线全停的电网大面积停电事故。

Refuse Operation Fault Analysis of 110 kV Lines and Its Disposal Measures

110 kV power grid of Deyang area in Sichuan Province is a power supply center of 220 kV transformer substations, whose operation mode is radial power supply to the load transformer substation. This paper deeply analyzes the power grid structure and operation mode when 110 kV single loop line of 220 kV substation aborts. If the fault lines take place line switch or protection refuse operating, it will lead to 110 kV bus of 220 kV substation full cut-off and trigger large area blackout accident. So, it puts forward treatment measures including change the power grid operation mode to remove the cladding bar coupler or adjustment protection plan (when the accident happened, in a short time tripping off 110 kV bar coupler of 220 kV substations, then tripping off switch of double loop line load to ensure the fault bus bar isolation). These two measures can avoid 110 kV bus of 220 kV substations full cut-off and large area blackout accident.