Abstract:

Abstract:The safety busbar of Huaneng Shanghai Shidongkou Second Power Plant has three power sources, the maim power source, the standby power source and a diesel generator as the second standby power source. When the main power source was tripped off, the standby power source can be switched on automatically only after the bus voltage off signal occurred. The diesel generator does not can feed power for load test alone. To switch over from standby power source to main power source need to stop the standby power supply firstly. Aiming at above problems, a reformation measure of the safety busbar was put forward. Under the condition of the same phases of the main power source and the standby power source, two rapid switching devices were added between the three power sources of the safety busbar, and the problems mentioned above were solved effectively.