计及多类型储能调频容量动态申报的电能量与调频市场联合出清方法研究

Joint Clearing of the Energy and Frequency Regulation Market Considering Frequency Capacity Dynamic Declarations of Multiple Types of Energy Storage

储能作为当前重要的灵活性调节资源之一,在提高电力系统供电可靠性以及参与辅助服务方面占据重要地位。首先,分析了储能参与电力现货市场机制,厘清了储能参与电能量市场与调频市场的组织形式和定价逻辑;其次,考虑常规机组以及储能运行成本,构建了电能量市场预出清模型,并基于电能量市场预出清结果,计算了调频资源的机会成本并考虑多类型储能的荷电状态构建动态调频容量申报边界;然后,以调频总成本最小为优化目标,建立了调频市场出清模型,并在扣除最终确定的机组调频容量后生成电能量市场实时发电计划;最后,通过算例验证了所提联合出清机制的有效性,结果表明所提方法能够降低市场联合出清成本约17000元,从而激励了储能资源参与电网调节,促进了资源优化配置。

As one of the important flexibility regulation resources,an energy storage system(ESS)occupies an important position in improving the power supply reliability of the power system and participating in auxiliary services.This paper firstly analyzes the mechanism of ESS participation in the electricity spot market.It clarifies the organizational form and pricing logic of ESS participation in the electric energy market and the frequency regulation market.Secondly,it considers the operating costs of conventional units and ESS,constructs the electric energy market pre-clearance model,calculates the opportunity cost of frequency regulation resources based on the results of the pre-clearance of the electric energy market,and constructs the boundary of the declaration of the dynamic frequency regulation capacity by taking into consideration of the state of charge(SOC)of multiple types of ESS.Then,with the optimization objective of minimizing the total cost of frequency regulation,the frequency regulation market clearing model is constructed,and the real-time generation plan of the electric energy market is generated after deducting the finalized frequency regulation capacity of the unit.Finally,the effectiveness of the proposed joint clearing mechanism is verified through an arithmetic example,and the results show that the proposed method can reduce the joint clearing cost of the market by about 17,000 yuan,stimulate the participation of energy storage resources in grid regulation,and promote the optimal allocation of resources.