基于功率动态分配与容量短期补偿的用户侧BESS复用策略

Multiplexing Strategy for User-side Battery Energy Storage System Based on Dynamic Power Distribution and Short-term Capacity Compensation

用户侧电池储能系统(BESS)在维持新能源高渗透电网电力电量平衡中扮演着重要角色,其面向峰谷套利和调频的复用模式受到了广泛关注。但该模式下,BESS调度面临峰谷套利价格时变性和调频需求随机性的双重挑战。为更好地利用BESS资源,以最大化用户侧BESS日内收益为目标,提出了基于功率动态分配与容量短期补偿的用户侧BESS复用策略,并形成以套利功率、调差系数、容量补偿系数为核心参数的复用结果。仿真分析表明,通过动态功率分配,实现了BESS功率面向峰谷套利和调频的动态调整;通过容量短期补偿,实现了BESS对频率偏差信号的持续跟踪,并有效避免了容量越限的发生,BESS综合收益显著提升。

The user-side battery energy storage system(BESS)plays an important role in maintaining the power balance of the power system with high penetration of renewable energy,and its multiplexed operation mode for energy arbitrage and frequency regulation attracts extensive attentions.However,the dispatching of BESS faces the dual challenges of the time-varying energy arbitrage price and the random frequency regulation demand in the multiplexed operation mode.To make better use of BESS resources and maximize the demand-side BESS daily profit,a multiplexing strategy for user-side BESS based on dynamic power distribution and short-term capacity compensation is proposed,and a scheduling result is formed with the arbitrage power,droop coefficient and capacity compensation coefficient as the core parameters.The simulation results show that the dynamic power distribution achieves the dynamic adjustment of BESS power between energy arbitrage and frequency regulation.Meanwhile,the short-term capacity compensation accomplishes the continuous track of frequency deviation signals and effectively avoids the overload of capacity.The profits of BESS are significantly improved with the application of the strategy.