计及需求响应的热电联合系统优化调度策略

An Optimal Dispatching Strategy of Combined Heat and Power System Considering Demand Response

摘要: 传统热电联合调度中，系统在负荷高峰时调峰能力不足，导致弃风现象高发。鉴于此，本文提出一种计及需求响应的热电联合系统优化调度策略，将需求响应融入传统发电日前调度计划，建立了同时考虑分时电价参与电力平衡和分时热价参与热力平衡的日前经济调度模型。以系统煤耗量最小为目标函数，考虑系统运行约束，机组运行约束，热网储热约束和需求响应约束进行日前调度。最后将本文提出的调度策略应用于热电联合系统实际算例，并与传统调度策略进行对比，算例分析结果表明，基于需求响应的热电联合系统优化调度策略可以提高系统经济性和消纳风电能力。

Abstract: In the traditional dispatching strategy of CHPS, the peak shaving capacity of the system is insuffi-cient, which results in high incidence of wind power curtailment. In view of this, an optimal dis-patching strategy for CHPS considering DR is proposed in the paper. The DR is integrated into the traditional generation dispatching plan, and the day-ahead economic dispatching model is estab-lished. The dispatching model takes into account the TOU electricity price and the TOU heat price at the same time. The paper takes the minimum system coal consumption as the objective function. The constraints include the system operation constraints, unit operation constraints, heat storage constraints of the heat network and DR constraints. The dispatching strategy proposed in the paper is implemented in practical case of the CHPS and compared with the traditional dispatching strategy. Simulation result shows that the optimal dispatching strategy of the CHPS considering DR can improve the system economy and decrease the wind power curtailment.