110kV内桥接线变电所110kV系统BZT运行方式的探讨

Discussion on the operation mode of the automatic switching-on device of reserve power source in 110 kV inner-bridge-connection substation

阐述了内桥接线方式的110 kV变电所的不同运行方式,以及备自投装置动作逻辑。同时对变换运行方式后不同故障下的备自投动作情况进行了分析。针对110 kVⅡ段母线故障时,可能引起设备的受损程度加重扩大事故,提出了通过合理的系统方式及备自投方式调整的方案,并通过对调整后各类故障时对电网影响进行分析,证明改进后的方案不仅可以避免重复向故障点送电故障扩大的危险,也可以最大可能地保证供电的可靠性。

The different operation mode in 110 kV inner-bridge-connection substation and the operating logic of the automatic switching-on device of reserve power source are discussed. Meanwhile, the device operating process under different failures is analyzed after changing the operation mode. When the failure happens in 110 kV Ⅱ main bus, it will be expanded and thus bring more damage to the equipments. So, reasonable system mode and the promoted project on the switch-on device are put forward. By analyzing the device operating process under the failures, the promoted project is proved to be satisfied and the failure is avoided to be expanded.