一起电压互感器异常引起无功波动事件的处理
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摘要
发电机出口电压互感器二次电压作为发电机励磁系统、发变组保护、测控及计量等装置电压模拟量的采集源,是发变组重要的电气辅助设备,其输出的电压异常会导致整个发变组运行异常,严重时会导致机组非计划停运或造成重大设备损坏事故。针对一起火力发电机出口电压互感器异常引起的无功出力异常波动事件,分析了事件原因的可能性,结合相关试验确定了事件的根本原因,并提出了相应的技术措施,可供相关工作人员参考。
The secondary voltage of generator outlet voltage transformer, as an acquisition source for voltage analogue of generator excitation system, generator-transformer protection, measurement and control,metering devices, ect. is an important auxiliary electrical equipment of generator-transformer unit. The abnormal output voltage of generator-transformer unit will lead to abnormal operation of the whole generator-transformer unit, even unplanned outage or major equipment damage accidents. Aiming at an abnormal fluctuation event of reactive power output caused by the abnormality of voltage transformer at the outlet of thermal power generator,the possibility causes of the event are comprehensively analyzed and the root cause of the event is determined with relevant experiments, which provides corresponding technical countermeasures suggestions.
The secondary voltage of generator outlet voltage transformer, as an acquisition source for voltage analogue of generator excitation system, generator-transformer protection, measurement and control,metering devices, ect. is an important auxiliary electrical equipment of generator-transformer unit. The abnormal output voltage of generator-transformer unit will lead to abnormal operation of the whole generator-transformer unit, even unplanned outage or major equipment damage accidents. Aiming at an abnormal fluctuation event of reactive power output caused by the abnormality of voltage transformer at the outlet of thermal power generator,the possibility causes of the event are comprehensively analyzed and the root cause of the event is determined with relevant experiments, which provides corresponding technical countermeasures suggestions.
引文
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3肖华宾.600 MW发电机出口PT故障技术分析及解决方案[J].神华科技,2009,7(4):50-52.
4中华人民共和国电力工业部.电力设备预防性试验规程:DL/T 596-1996[S].北京:中国电力出版社,2017.
2张敏,蔡炯,王季梅.关于沙洲电厂发电机出口电压互感器高压熔丝异常熔断问题的探讨[J].电工文摘,2014(2):23-25.
3肖华宾.600 MW发电机出口PT故障技术分析及解决方案[J].神华科技,2009,7(4):50-52.
4中华人民共和国电力工业部.电力设备预防性试验规程:DL/T 596-1996[S].北京:中国电力出版社,2017.