Safety Evaluation and Control Optimization Technology for in-Depth Peak-Shaving of Subcritical Drum Boiler

doi:10.11930/j.issn.1004-9649.201907042

Abstract

Abstract: In order to address the difficulties of power system frequency regulation and peak shaving stemming from fast-growing new energy absorption capacity, as a type of conventional power sources, coal-fired units have to implement deep, rapid and frequent load adjustment, which is anticipated to reduce or eliminate the impact of intermittency and randomness of wind and photovoltaic power on the security of power grid operations. Taking a 330 MW subcritical drum furnace unit as the study object, this paper explores the boundary conditions and assesses the reasonable lower limit of peak shaving in deep load variation process. Then by virtue of the optimization design of advanced control strategy, the quality and reliability of the control over each system have been improved. The study results show that the unit is capable of performing peak shaving at 27% of rated load without any engagement of system or equipment transformation.

Key words: coal-fired unit, deep load variation, safety boundary condition, assessment of lower peak-shaving limit, coordination strategy optimization

ZHANG Shun, YAN Peifei, YAO Hongyu, LI Shengpeng, CAO Shibao, GAO Yazhou. Safety Evaluation and Control Optimization Technology for in-Depth Peak-Shaving of Subcritical Drum Boiler[J]. Electric Power, 2020, 53(7): 203-210.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201907042

https://www.electricpower.com.cn/EN/Y2020/V53/I7/203

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