Open AccessAnalysis and treatment of shutdown due to high condenser pressure towards ultra-supercritical 660MW turbine
Author(s) -
Wanjun Li,
Xiaoxia Li
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/300/4/042016
Subject(s) - shutdown , tripping , supercritical fluid , turbine , condenser (optics) , boiler (water heating) , relay , fault (geology) , nuclear engineering , boiler feedwater pump , load rejection , surface condenser , power station , steam turbine , engineering , environmental science , electrical engineering , steam electric power station , mechanical engineering , power (physics) , waste management , circuit breaker , combined cycle , chemistry , geology , superheated steam , optics , quantum mechanics , light source , physics , organic chemistry , seismology
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.