Optimization and Regulation of Fans Based on Online Monitoring of Air-Cooled Island

doi:10.11930/j.issn.1004-9649.201803069

Abstract

Abstract: As the air-cooled island is the cold-end of the air-cooled generator, its performance optimization is of great significance to improve the operation economy and reach the goal of the energy saving for the power plant. Taking a 600 MW subcritical direct air-cooled unit as the research object, the optimization calculation model of the cold-end system is established, and the equivalent heat drop method is used to calculate the optimal real-time back-pressure of the unit. Through the establishment of the air-cooled island state performance monitoring system, the condensate sub-cooling degree and cleaning factors is able to be monitored online. According to the monitoring results, the operation frequency of each fan on the air-cooled island is tuned precisely such that the online monitoring based in-depth optimization is performed for the performance of the air-cooled island. The online monitoring and optimization operation technology has been applied to the 600 MW air-cooled unit and has achieved good economic benefits, which can provide positive reference for the optimal operation of the cold-end of air-cooled units as well as the construction of smart power plant.

Key words: coal-fired power plant, direct air-cooled unit, smart power plant, steam turbine, air-cooled island, equivalent heat drop, real-time best back-pressure, state performance, online monitoring

CLC Number:

TK262

WANG He, LI Yuedong, QIN Zhiguo, YIN Xiaohui, MA Suxia, WANG Fang, ZHANG Jiajie. Optimization and Regulation of Fans Based on Online Monitoring of Air-Cooled Island[J]. Electric Power, 2018, 51(8): 154-161.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201803069

https://www.electricpower.com.cn/EN/Y2018/V51/I8/154

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