大型水电站厂用电电压不平衡分析及应对措施  

Large hydropower plant power voltage unbalance analysis and countermeasures

作　　者：王刚 薛万军 

机构地区：[1]二滩水力发电厂,四川省攀枝花市617000

出　　处：《水电与抽水蓄能》2017年第4期95-99,共5页Hydropower and Pumped Storage

摘　　要：本文介绍了一起典型的大型水电站在机组正常运行期间,监控系统上多次出现2号机组故障录波触发的报警,现场检查是发现厂用电电压不平衡造成该报警信号。现场根据对于我厂出现的602M TV发生三相电压不平衡造成故障录波装置频繁触发的事件进行了深入的分析,确定了602M发生的电压三相不平衡即为A相间歇性虚幻接地造成的,紧接着我们又对发生间歇性虚幻接地的原因进行了深入讨论。最终,根据发生原因采取了相应的改进措施以应对该现象,以保障厂用电的安全运行。this paper introduces the typical large hydropower stations in the unit during normal operation,monitoring and control system on multiple fault wave record unit 2 trigger the alarm,onsite inspection is found that the auxiliary power voltage imbalance caused the alarm. Field according to the 602 m for our factory in PT occurs due to unbalanced three-phase voltage fault wave record device are carried on the thorough analysis of the trigger event,determine the unbalanced three-phase voltage of 602 m is A phase of intermittent virtual ground,then we have to have the intermittent virtual ground reason carried on the thorough discussion. Finally,the corresponding improvement measures are adopted to deal with this phenomenon,so as to ensure the safe operation of the plant.

关 键 词：故障录波 厂用电 不平衡 措施 

分 类 号：TV743[水利工程—水利水电工程]