Analysis and treatment of abnormal shutdown of ultra-supercritical 660MW unit due to low feed water flow

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Li, Wanjun^1 ; Li, Xiaoxia^2 ; Zhang, Deke^1 ; Niu, Qingliang^1 ; Huang, Tianqi^1

Huadian Electric Power Research Institute Co. LTD., Jinan

250014, China^1

CRRC Wind Power (ShanDong) CO. Ltd, Jinan

250022, China^2

关键词: Boiler feed;    Boiler feed water;    Fault treatment;    Feed pumps;    Main steam pressures;    Normal operations;    On-site inspection;    Steam turbine-generator set;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/4/042061/pdf
DOI  :  10.1088/1755-1315/300/4/042061

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 generator set in a power plant, the output of the coal mill was insufficient, and the boiler feed water flow gradually decreased. After reducing the power load, the boiler feed water flow continued to decrease to the protection action, and the unit tripped. Through on-site inspection and inspection of the operation curve, it was found that the main steam pressure was high, and the re-circulation valves of the steam-driven feed pump A and B were opened. Cause of the fault was accurate analysis. After optimizing the flow rate of the steam feed pump, the unit was restarted and ran normally.