换流站交流场3/2接线中开关联锁跳闸逻辑设计与实现方法

Design and realization method for interlock tripping logic of converter station AC circuit breaker in middle with 3/2 connection

为了解决换流站中开关联锁存在的问题,提出一种换流站中开关联锁逻辑设计与实现方法。利用中开关电流互感器二次电流作为启动量,结合两侧边开关在不同的运行方式,对中开关联锁逻辑进行智能化判断。考虑了与换流变或大组交流滤波器配串的交流线路在各种故障运行工况时的中开关动作逻辑,具备自适应运行方式的能力。仿真分析结果表明,该方法能适应大容量交直流系统各种运行工况,实现了对开关单跳、偷跳等涉及中开关联锁跳闸运行工况的智能化判断。

This paper proposes a new design and realization method for interlock logic of converter station circuit breaker in middle. By using the CT secondary current of circuit breaker in middle as the starting quantity and combining with the different operation of both side breakers, the interlock logic of converter station circuit breaker in middle is judged. Interlock trip logics of AC line string with converter transformer or super group AC filter under different fault operation conditions are considered, showing a self-adaptive capacity. Simulation analysis result indicates the method can adapt different operation conditions of high capacity HVDC/AC system, and will make a intelligence diagnosis for the operation condition of interlock logic trip of circuit breaker in middle, such as breaker’s single trip, non-fault trip and so on.