126kV全封闭组合电器电气闭锁原理设计

Electrical Blocking Principle Design of 126 kV Gas Insulated Switchgears

为防止SF_6全封闭组合电器设备误操作事故的发生,以典型单母线分段主接线方案的126 kV组合电器为例,分析了断路器、隔离开关、接地开关的电气闭锁原理,并针对隔离开关控制回路存在的缺陷,设计了隔离开关电机电源与控制电源的闭锁回路,实现了设备操作防误闭锁功能,保障了设备和人身安全。

To avoid incorrect operation of SF6 gas insulated switchgears, taking the typical single bus with subsection connection of 126 kVcomposite apparatus for example, this paper analyzed the electrical blocking principles of breaker, disconnector and earthing switch. Aiming atthe defects existing in disconnector control loop, this paper designed a blocking circuit for power supply and control of disconnector, which realizesthe misoperation-preventive locking function of equipment to guarantee equipment and personal safety.