柔直换流站柔性直流换流阀控制保护屏出口回路异常情况分析

Analysis of Outlet Circuit Anomaly of Flexible DC Converter Valve Control and Protection Panel in Flexible DC Converter Station

通过对柔直换流站极2低端阀组站系统调试期间,极2低端A套阀控制保护带电跳闸试验时断路器操作箱三相出口不一致情况进行分析,对极2低端阀控跳闸出口逻辑、组控跳闸出口逻辑及断路器操作箱回路进行梳理,总结出阀控系统跳闸出口时,组控系统手跳与远跳命令同时下发,STJ继电器与TJR继电器由于动作时序不一致,导致断路器操作箱出口跳闸信号灯三相不一致。通过对该回路进行改进,取消了阀控系统跳闸启动组控系统手跳回路的逻辑,通过逻辑优化确保现场调试及后期运维工作安全有序开展。该策略可在柔直换流站阀控、组控逻辑配置中推广使用。

The inconsistency of the three-phase outlet of the circuit breaker operation box during the commissioning of a low-end valve group station system of the primary flexible direct converter station is analyzed in the live tripping test of the control and protection of a set of valves.The outlet logic of valve controlled tripping at the low end,the outlet logic of group controlled tripping and the circuit of circuit breaker operation box are analyzed.It is concluded that when the valve control system trips the outlet,the manual tripping and remote tripping commands of the group control system are issued at the same time,and the three phases of the tripping signal lamp at the outlet of the circuit breaker operation box are inconsistent due to the inconsistent action timing of STJ relay and TJR relay.By improving and optimizing the circuit,the logic of manual tripping circuit of valve control system is cancelled.Safe and ordered performing of on-site commissioning and later operation and maintenance are ensured through logic optimization.This strategy can be widely used in valve control and group control logic configuration of flexible direct converter station.