基于风光上网量的抽汽-熔盐储热光煤耦合调峰系统运行策略经济性分析OA

To solve the problem of coordinating peak-shaving flexibility and economic efficiency of coal-fired units under the background of high-proportion wind-solar power integration,600 MW subcritical coal-fired units were taken as the research object,and a deep peak-shaving system with solar-coal coupling based on steam extraction and molten salt thermal energy storage was proposed.In view of the limitation that existing research fails to fully consider the interaction between wind and solar power integration amount and the operation strategies for the peak-shaving system,a life-cycle cost system covering initial investment,operation and maintenance,and coal cost was established.Additionally,an economic model was established with net present value,dynamic investment payback period,levelized cost of electricity,and wind and solar power curtailment as evaluation indicators.Combined with wind and solar output curves and daily load curves,seven differentiated operation strategies were designed,and their multi-dimensional performance was comprehensively optimized and selected using the entropy weight-TOPSIS method.The results showed that strategy 1 was optimal for comprehensive performance.By precisely matching the thermal energy storage timing of high wind and solar power output with low load periods,strategy 1 achieved the triple advantages of a net present value of 180.71 million yuan,a dynamic investment payback period of 7.424 a,and wind and solar power curtailment of 2 090 MW·h.The system output power closely followed the daily load curves,and the wind and solar power integration ratio reached 72.54%.