中国电机工程学报2026，Vol.46Issue(2)：691-702,中插20,13.DOI:10.13334/j.0258-8013.pcsee.241471
耦合熔盐储热的火电机组灵活调峰控制策略
Flexible Peak Shaving Control Strategy of Thermal Power Unit Coupled With Molten Salt Heat Storage System
摘要
Abstract
In order to promote the high-level integration of renewable energy and enhance the security coordination capacity of the new-type power system,it is imperative to carry out flexibility transformation on existing thermal power units in China to achieve deep peak-shaving control.This paper proposes a coupled molten salt scheme for the 660 MW supercritical unit,in which a portion of the main steam is extracted to heat the cold molten salt for heat storage,while the hot molten salt is used to heat a portion of the deaerator feed water for heat release.First,a comprehensive dynamic mathematical model of the overall system is developed and validated,and a thermal-storage flexible peak shaving control strategy is proposed for flexible deep peak-shaving.In the proposed scheme,the unit power output is mainly controlled by the extracted steam and pumping flow in the molten salt storage system when the load demand change is within peak shaving capacity,with the boiler-turbine control system as a supplement.The simulation results show that the new downward peak shaving capacity is 57.9 MW,and the peak shaving depth increment is 8.77％;the new upward peak shaving capacity is 24.43 MW,and the peak shaving depth increment is 3.7％,which effectively expands the unit's peak shaving operation range.Moreover,the proposed flexible peak shaving control strategy can achieve fast and accurate response to a wide range of load commands and significantly reduce the impacts on the unit body,particularly on the boiler side.Meanwhile,it effectively reduces load variation frequency and extreme operating scenarios,thereby largely enhancing the safety and flexibility of unit peak shaving operation.关键词
熔盐储热/火储联合/灵活调峰/调峰容量Key words
molten salt heat storage/integrated thermal and storage unit/flexible peak shaving/peak shaving capacity分类
能源科技引用本文复制引用
魏乐,樊冰芬,张怡,房方..耦合熔盐储热的火电机组灵活调峰控制策略[J].中国电机工程学报,2026,46(2):691-702,中插20,13.基金项目
国家重点研发计划项目(2022YFB4100404).National Key R&D Program of China(2022YFB4100404). （2022YFB4100404）
