基于成本最优的含储热光热电站与火电机组联合出力日前调度

Day-ahead dispatch for output of combined CSP with thermal storage system and thermal power units based on minimized operation cost

含储热光热发电的优势体现为良好的出力可控性和可调度性,合理调度光热发电能够有效降低系统运行成本。以成本最优为目标,从光热电站的光电转换特性分析角度出发,在计及各项运行约束的基础上,提出含储热光热电站与火电机组联合出力调度策略。该策略综合考虑火电机组发电成本、光热发电并网消纳的环境效益和运行维护成本、系统旋转备用成本以及电网安全运行约束等因素,从而确定光热电站在既定储热容量下的最优出力调度策略。基于遗传算法,通过IEEE 30节点算例验证了所提方法的可行性与有效性。

CSP( Concentrating Solar Power) with thermal storage systems is advantageous in terms of effective controllability and dispatch ability. Optimal dispatching of CSP contributes to reduced operation cost of the power system. To minimize the operation cost,combined optimal dispatch of CSP with thermal storage system and thermal power units is proposed with the consideration of solar power conversion characteristics and operation constraints. This strategy considers the generation cost of thermal unit,the environmental benefits and the operation and maintenance costs added by the connection of CSP to the grid,system spinning reserve cost,and secure operation constraints,for which the optimal dispatch strategy of CSP with given thermal storage is obtained. The model is solved using genetic algorithm,and the effectiveness of the proposed method is verified by simulative results of IEEE 30-bus system.