内桥接线变电站备自投与主变保护的配合

Study on coordination of main transformer protection and spare power automatic switching device for substations equipped with interbridge connection

通过对110kV内桥接线变电站备用电源自动投入装置的逻辑功能分析，详细论述了完全内桥和不完全内桥两种主接线方式下，主变保护动作对备自投装置动作的影响，并提出了110kV内桥接线变电站备用电源自动投入装置与主变保护的配合方案，使备用电源自动投入装置更加能够自动适应变电站运行方式，自动选择投退主变保护闭锁备自投。

Based on logic analysis of standby power automatic switching device for 110kV substations equipped with inter - bridge connection, this thesis discusses the influence of main transformer protection operation on standby power automatic switching device operation under complete and incomplete inter -bridge connection. And the coordination scheme between main transformer protection and standby power automatic switching device in ll0kV inter -bridge connection substations is proposed, which makes standby power automatic switching device more adaptive to substation operation mode and the choice of the lock of automatic switching device by main transformer protection.