新型电力系统下构网需求储能的双层优化选址方法研究

Research on double-layer optimization site selection method for energy storage with grid-forming demand in new power system

提出了一种新型电力系统下构网需求储能的双层优化选址方法,该方法考虑了储能在电力系统中对调峰调频的响应,建立了多目标双层优化模型。其中,运行层将弃风弃光量和网损计入经济惩罚中,以系统的年运行成本最优为目标,计及调峰、调频收益;规划层评估系统的安全性,并以系统的年综合运行成本最优为目标进行建模。利用改进的帝国竞争算法进行仿真分析,通过多场景比较说明调峰调频经济性和最优场景下的储能选址。最后,采用IEEE-33节点进行仿真,验证所提模型的有效性,并选取不确定性因素指标对总成本进行敏感性分析,确定影响经济成本更需关注的指标。

A double-layer optimization site selection method for energy storage with grid-forming demand in novel power system is proposed,which considers the response of energy storage to peak shaving and frequency regulation in the power system and establishes a multi-objective double-layer optimization model.The operation layer counts the wind and solar power abandonment and network losses into the economic penalty,and takes the optimal annual operating cost of the system as the objective,considers the benefits of peak shaving and frequency modulation.The planning layer evaluates the security of the system and models the system by taking the optimal comprehensive annual operating cost of the system as the objective.Simulation and analysis of the algorithms are carried out using the improved empire competition algorithm.The peaking and frequency regulation economics and energy storage siting in the optimal scenario are illustrated through multi-scenario comparisons.Finally,the IEEE-33 node arithmetic system is simulated and analyzed to verify the validity of the proposed model.Furthermore,uncertainty factor indicators are selected to conduct sensitivity analysis on total costs,and the indicators that need more attention to affect economic costs are determined.