计及多类型需求响应的孤岛型微能源网经济运行

Optimal Operation of Islanded Micro Energy Grid With Multi-type Demand Responses

在区域能源互联网迅速发展及多能耦合日渐紧密的背景下,如何进一步优化孤岛型微能源网结构,提高系统运行的稳定性和经济性是当前热点问题。失去了外部电网的有效支撑,仅通过内部微源的调度,孤岛型微能源网难以维持系统能量的实时平衡。为此,针对孤岛型微能源网运行特点,引入冷、热、电多类型负荷需求响应,综合考虑能源耦合与转换特性、分布式微源运行特性的基础上,基于能源集线器架构提出了计及多类型需求响应的孤岛型微能源网优化调度模型。采用混合整数规划法求解模型,得出各机组与储能装置的启停状态、最优出力及系统综合运行成本。仿真算例表明:通过引入柔性冷、热、电多负荷的需求侧响应,可以提高孤岛型微能源网能源供应的灵活性,并降低系统的运行成本。

Under the background of rapid development of energy internet and increasingly coupling relationship of multiple energies,how to further optimize energy structure to improve economy and stability within islanded micro energy grid is a hot issue of study.Without effective support from main grid,it is difficult to maintain real-time energy balance only by scheduling of internal micro-sources.In view of the operating characteristics of islanded micro energy grid,this paper conducts an analysis from the perspective of cooling,heating and power demand responses.Comprehensively considering the characteristics of energy coupling and conversion,operation characteristics of distributed units and energy storage devices,an optimization model of islanded micro energy grid with multi-type demand responses is proposed based on the framework of energy hub.The model is solved with mixed integer programming method to obtain the start-stop status,optimal output and total operating cost of each unit and energy storage device.Simulation results show that,by introducing the demand responses of cooling,heating and power,flexibility of energy supply for islanded micro energy grid is effectively improved,eventually contributing to reduction of total operating costs.