Switchover Operation of Control & Protection in Lingbao Project

The control/DC pole valve protection system in Lingbao DC converter station is a distributed system with hierarchical structure. It contains following main subsystems: the operator control system, station control system, pole control system, DC pole valve protection system, and dispatching system. There are two sets of control/DC pole valve protection systems in Lingbao BTB project, and the two systems will switchover in operation in time-sharing mode. The switchover at interfaces between one system and other equipment/system is different depending on different signals. That is not convenient in operation, however, such switchover can verify the equipment supplied by the 2 manufacturers.