为应对我国“三北”地区的弃风现象，在热电机组中耦合蓄热装置可以实现热电厂热力生产与电力生产的解耦运行，扩大电力调峰空间，避免弃风现象的产生。以丹东地区某330 MW亚临界机组为研究对象，在热电机组中增设蓄热装置，阐释热电机组耦合蓄热装置后消纳弃风的机理，考虑风电功率、火电机组功率以及居民电热负荷的相关约束，以系统总能耗最小为目标，基于模拟退火优化算法制定蓄热装置的运行策略。结果表明：采取优化后的策略运行，在夜间风能充裕的时间段蓄热装置放热，可打破原热电机组“以热定电”的最小电出力限制，使风电的上网电量得到提高；采用模拟退火算法优化后的运行策略，相比原热电机组运行能耗单日节省了22.47 t煤。

In order to avoid the occurrence of wind curtailment in the three north areas of our country,the coupled heat storage device was used in the cogeneration unit to realize the decoupling operation of thermal production and power production in the thermal power plant and expand the space of power peak regulation.This paper took a 330 MW subcritical unit in Dandong as the research object,which installed heat storage device in the cogeneration unit.The mechanism of reducing the wind curtailment after coupling the heat storage device was explained.Considering the relevant constraints of wind power,power of thermal power unit and electrical and thermal load for residents,the operation strategy of heat storage device based on simulated annealing optimization algorithm was generated when the minimum coal consumption of cogeneration unit was taken as the objective function.The simulation results show that when the wind energy is abundant at night,the heat storage device releases heat,optimal operation strategy can break the minimum power output limit of "heat fixed electricity" of the original unit,and increase the grid power of wind power.Through the operation strategy optimized by simulated annealing algorithm,the cogeneration unit equipped with heat storage device can save daily coal consumption of 22.47 ton compared with the original unit.

TK284.1

国家自然科学基金（51976129）