Analysis and treatment of shutdown due to high condenser pressure towards ultra-supercritical 660MW turbine

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Li, Wanjun^1 ; Li, Xiaoxia^2

Huadian Electric Power Research Institute Co. LTD., Jinan

250014, China^1

CRRC Wind Power (ShanDong)CO. LTD, Jinan

250022, China^2

关键词: Condenser pressure;    Electrical load;    Fault treatment;    Hydrophobic systems;    Normal operations;    On-site inspection;    Pump trips;    Supercritical;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/4/042016/pdf
DOI  :  10.1088/1755-1315/300/4/042016

学科分类：环境科学（综合）

来源: IOP

【 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.