水电站10 kV厂用电系统供电可靠性提升方法研究  

On the Improvement of the Power Supply Reliability of10 kV Auxiliary Power System in Hydropower Stations

作　　者：余振 唐伟[1] YU Zhen;TANG Wei(Hubei Qingjiang Hydroelectric Development Co.,Ltd.,Yichang 443000,China)

机构地区：[1]湖北清江水电开发有限责任公司,湖北宜昌443000

出　　处：《水电与新能源》2024年第8期33-37,共5页Hydropower and New Energy

摘　　要：以水布垭电厂为例,针对其10 kV厂用电系统供电可靠性提升方法进行了研究,从备自投闭锁控制逻辑优化和厂高变断路器控制优化两个方面提出了具体优化方案。一是增加了断路器保护跳闸闭锁备自投启动的保护控制逻辑,防止备自投合闸于故障母线导致事故扩大;二是对机组停机流程中分厂高变断路器顺序进行了优化,使发电机组在解列后能够继续通过厂高变断路器对厂用电系统进行供电。实际应用表明了有效性,确保了在紧急情况下厂用电系统的供电可靠性,降低了发生大面积失电的风险。Taking Shuibuya Hydropower Station as an example,the improvement methods for the power supply reliability of its 10 kV auxiliary power system are studied.Specific optimization schemes are proposed from two aspects:optimization of the interlocking control logic of the automatic switchover backup and the control of the auxiliary high voltage transformer circuit breakers.Firstly,a protection control logic of locking the automatic switchover backup in case of breaker protection tripping is added to prevent the switching of the automatic switchover backup on the faulty busbar and the escalation of the accident.Secondly,the control sequence of the auxiliary high voltage transformer circuit breakers in the shutdown process of the units is optimized,so that the units can continue to supply power to the auxiliary power system through the auxiliary high voltage transformer breakers after disconnection.The effectiveness of the optimization is verified by practical application,which ensures the power supply reliability of the auxiliary power system in emergency situations and reduces the risk of large-scale power outages.

关 键 词：水电站 厂用电系统 可靠性 备自投 

分 类 号：TV742[水利工程—水利水电工程]