期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：300
期号：4
页码：1-6
DOI：10.1088/1755-1315/300/4/042016
出版社：IOP Publishing
摘要：During the normal operation of an ultra-supercritical 660MW steam turbine in a power plant, the pressure of condenser gradually increases, then reduced electrical load, condenser pressure continued to rise to the protection action, the unit shutdown. Through on-site inspection and inspection of the operation curve, it was found that after the water level of the collecting water tank of the boiler's starting hydrophobic system was zero, the B hydrophobic pump was still closed and the outlet electric door was not closed. The fault of the B hydrophobic pump's trip relay was diagnosed and investigated, and the cause of the fault was accurately analyzed. After replacing the tripping relay and adding the tripping logic of the drain pump, the unit can be restarted and run normally.
