一起发电厂低压变频器异常运行分析及预防措施

Analysis and Preventive Measures of Abnormal Operation of a Low-voltage Inverter in Power Plant

变频器具有优越的调速性能,并且通过变频改造还能取得较好的节能效果,因此变频器越来越多的被应用于发电厂,结合某发电厂一起变频器异常运行故障,阐述和分析在运行中出现的一些问题,如电网由于故障造成电压降低时,一类辅机变频器低电压保护跳闸,将迫使机组降负荷或停运,威胁发电厂的安全稳定运行并提出预防措施。

Inverters have superior speed control performance and can achieve good energy-saving effects through the frequency conversion transformation,so more and more inverters are used in power plants.Combined with the abnormal operation failure of the inverter in the first phase of a power plant,the paper explains and analyzes the problems during the operation,for example,when the voltage of the power grid decreases due to a fault,the low-voltage protection trip of the first class of auxiliary inverter will force the unit to reduce load or stop operation,that will threaten the safe and stable operation of the power plant,the paper also propose preventive measures.