电网备用电源自动投入的实践与思考

Practice and thought of automatic bus transfer in power network

备用电源自动投入装置(简称备自投或BZT)对电力系统安全可靠供电有非常重要的意义。以常德城区110kV电网应用BZT为例,介绍了BZT在110kV电网中的设置及自动投切的方式和逻辑。给出了进线断路器备自投和母联开关备自投的工作逻辑和投切过程。指出了在投切过程中应注意的问题及解决对策。根据不同的运行方式,投切转供给系统带来的不同影响,进行正确的应对和处理。

The automatic bus transfer equipment is important for the safe and reliable power supply in electric power systems.Taking the automatic bus transfer equipment of Changde 110 kV power network as an example,its setting,switching mode and logic in 110 kV network are intro-duced.The operating logics and processes of the automatic transfer of the incoming line breaker and the bus-tie switch are presented.Some cautions and countermeasures during switching are pointed out.In different operating modes,the transfer does different influences on the system,which ought to be processed properly.