一次典型的西门子LCI软起动励磁控制系统的故障分析

来源期刊：冶金自动化2010年第1期

论文作者：付春钢 周广生 李倩 曲燕

文章页码：35 - 40

关键词：LCI软起动； SimovertS； 励磁控制； 故障分析与处理

Key words：LCI soft starter； Simovert S； excitation control； fault analysis and treatment

摘    要：针对某制氧厂西门子LCI软起动系统运行中出现的同步电动机失步后强励再同步的故障处理过程,结合当时的现场情况和报警记录、事件记录,对有关源程序进行了较为细致的分析,整理出与励磁控制相关的控制模式切换和励磁设定值处理程序流程图;通过流程图可以清楚地看出起动完毕后,励磁控制模式如何恢复到故障停机前的模式;如果运行参数测量仪表Simeas P出现故障,励磁控制模式又是如何自动切换到较为安全的恒定励磁控制模式以及不同的励磁设定值通道是如何起作用的,最后结合流程图对故障发生的原因及表现出的故障现象进行了分析。文中描述的故障分析思路及LCI软起动的励磁控制流程图对类似励磁控制系统程序的分析和西门子LCI软起动器相关故障的处理有借鉴作用。

Abstract: According to an excitation control fault treatment process of Siemens LCI soft starter,combined with alarm record and event record,relative source program was analyzed in detail,and control mode switchover and excitation setting treatment flow charts associated with excitation control were given.The fault was that the synchronous motor ran in out of step status and excitation control system generated peak excitation current to pull rotor synchronizing with stator.Through the flow charts,it is clearly seen that after starting finished,how excitation control mode was returned to the mode before stop;if parameter measuring instrument Simeas P occurred fault,how excitation control mode was automatically switched to safty constant excitation control mode;as well as function of various excitation setting channels.At last,based on flow chart,cause and phenomenon of fault are analyzed.The fault analysis thinking and excitation control flow chart of LCI soft starter could be used as reference for analysis of similar excitation control system program and fault treatment of Siemens LCI soft starter.