发电厂厂用电快切方式的优化  

Research and Optimization of Fast Switching Mode of Power Consumption at Power Plant

作　　者：汪洋[1] 项林[1] WANG Yang;XIANG Lin(Tianji Power Plant of Huaihu Coal&Power Co.,Ltd.)

机构地区：[1]淮沪煤电有限公司田集发电厂

出　　处：《上海节能》2021年第9期1038-1041,共4页Shanghai Energy Saving

摘　　要：目前很多火电厂机组扩建,但启备变容量并没有相应增加,极易导致事故情况下,启备变带多台机组同时快速切换而瞬间过流,启备变保护动作跳闸,对全厂安全生产存在极大隐患。通过对某大型发电厂线路配置情况进行分析,针对单线路运行故障导致4台机组同时跳机时启备变自启动容量不足的情况,对保护逻辑、快切方式进行了修改,有效解决了问题,节省了启备变扩容或增加带来的投资,对大型火力发电厂的经济性和厂用电安全有一定的参考意义。At present,many units in thermal power plants have been expanded,but the capacity of start-up and standby transformer has not been increased accordingly,which is very easy to lead to ac-cidents.In case of accidents,the start-up and standby transformer with multiple units switching quickly at the same time shows instantaneous over-current and the protection action of start-up and standby transformer trips,which has great hidden dangers for the safety production of the whole plant.Based on the analysis of the power line configuration of a large power plant,the protection logic and fast switching mode are modified in view of the insufficient self-starting capacity of the start-up standby transformer when four units trip at the same time due to a single line operation fault.Problem is effec-tively solved and the investment brought by the expansion or increase of startup and standby trans-former is saved.It has a certain reference significance for the economy and auxiliary power safety of large-scale thermal power plants.

关 键 词：单线路运行 快切方式 启备变 投资 

分 类 号：TM621[电气工程—电力系统及自动化]