储能与燃气轮机联合调频的经济性分析

Economic Analysis of the Coordinated Frequency Regulation for Energy Storage and Gas Turbine System

为了研究储能电池与燃气轮机联合调频系统的经济可行性,提出了由燃气轮机负责调频需求信号的低频分量,储能补偿出力,且考虑储能电池荷电状态的运行策略,基于Matlab/Simulink平台建立了计算重型燃气轮机出力的动态模型,并构建了系统的经济评估模型。在一段实际的调频需求信号下,比较了单独储能系统和储能、燃气轮机联合系统在达到相同调频表现时各自的系统总成本。结果表明:储能与燃气轮机的结合能够使得调频所需的储能电池容量下降,从而使得系统的总成本降低,成为更具有经济竞争力的调频资源。

To study the economic feasibility of coordinated frequency regulation for a system combined energy storage battery with gas turbine,an operation strategy was proposed,in which the gas turbine was responsible for low frequency component of frequency demand signal,while the energy storage battery compensated for its power output,and the state of the battery charge was considered.A dynamic model of heavy-duty gas turbine was established based on Matlab/Simulink platform,and an economic evaluation model for the system was constructed.Under a period of actual frequency regulation demand signal,the total system costs of single energy storage system and combined system of energy storage and gas turbine were compared when they achieve the same frequency regulation performance.Results show that the energy storage battery capacity required for frequency regulation of combined system is reduced,which leads to a decrease in the system total costs.The combined system thus becomes a more economically competitive frequency regulation resource.