汽轮机给水泵机组跳机故障诊断

Tripping Fault Diagnosis of Feed-water Pump Turbine

汽轮机给水泵机组在运行过程中出现异常,通常会触发机组保护系统,造成机组跳机。引起机组跳机的原因很多,为尽快查出机组跳机原因,恢复机组正常运行,有必要对机组跳机故障进行研究。以某机组跳机事件为研究对象,对引发此次机组跳机的故障原因进行诊断分析。通过分析机组工作原理,对引起机组跳机的触发信号以及会造成相应信号的故障原因进行梳理,再结合机组实际工作情况以及试验进行分析和排除。结果表明,机组双联泵失效,在机组完成电动油泵自动切除后,双联泵无法为机组提供滑油和控制用油,引起汽轮机的润滑油压或(和)速关阀驱动装置驱动油压低于限值,触发机组跳机动作。相关研究成果能够为类似机组跳机故障提供诊断参考。

Feed-water pump turbine in the process of operation abnormal,usually trigger unit protection system,causing unit trip.There are many causes of unit trip.In order to find out the cause of unit trip as soon as possible and restore the normal operation of unit,it is necessary to study the unit trip fault.Taking a tripping event of a unit as the object of study,the fault causes causing the tripping of the unit were diagnosed and analyzed.By analyzing the working principle of the unit,the triggering signal that causes the unit tripping and the fault cause that may cause the corresponding signal are sorted out,and then the actual working situation of the unit and the test are analyzed and eliminated.The results show that the double pump fails.After the automatic removal of the electric pump,the double pump fails to provide lubricating oil and control oil to the unit,which causes the lubricating oil pressure of the turbine or(and)the oil pressure driven by the quick-closing valve driver to be lower than the limit value,triggering the tripping action of the unit.Relevant research results can provide reference for similar unit tripping failure.