针对110 kV环网运行方式, 分析了传统保护配置方案存在的问题, 并提出了一种母线综合后备保护装置.利用主变远后备保护动作跳母联的信号, 提出了全新的110 kV线路综合后备保护, 并将其与断路器失灵保护集成于一体, 形成了完整的解决方案.该装置能够有效防止110 kV线路发生故障时因单重化线路保护装置拒动或者断路器失灵导致主变后备保护无选择性越级跳本侧断路器的问题, 缩小停电范围, 提高供电可靠性.仿真和试验结果表明了理论分析的正确性以及策略的有效性.%Aiming at the operation mode of 110 kV ring network, this paper analyzes the problems existing in the traditional protection configuration scheme, and advances a comprehensive backup protection device for busbar. The comprehensive backup protection of 110 kV line is proposed by using the bus connection breaker's trip signal of the transformer's far backup protection, and integrated with the failure protection of the circuit breaker to form a complete solution. When 110 kV line occurs faults, the device can effectively prevent the transformer backup protection' s no selective overstep tripping by current breaker because of the rejection of the single line protection device or the failure of the circuit breaker, reducing the power outage range and improving the reliability of the power supply. Results of simulation and prototype experiment verify the effectiveness of the proposed theory and control strategy.
展开▼
