储能系统参与多应用场景的协同运行策略

Coordinated Operation Strategy of Energy Storage System Participating in Multiple Application Scenarios

风电出力与负荷需求的时序关系导致仅用于风电消纳的储能具有闲置的时段和容量,故其利用率低、经济效益不佳。针对该问题,探讨了利用此类储能的闲置容量和功率参与电力能量市场和备用辅助服务市场的可行性和兼容性,并提出储能系统参与3种应用场景的协同运行策略,以提高储能利用率。首先,通过最优机组组合问题研究储能用于促进风电消纳的运行计划。然后,优化利用储能闲置容量和功率参与电力能量市场和备用辅助服务市场,修正储能系统运行计划。此外,在储能投标备用容量时设置预留容量空间以保证备用可用。算例仿真验证了该方法可显著提高储能运营收益,并分析了储能初始荷电状态、容量和功率对各应用场景下收益的影响。

The temporal relationship between wind power output and load demand leads to that the energy storage used only for the wind power accommodation has idle time and capacity,resulting in its low utilization and poor economic benefits.To address this problem,the feasibility and compatibility of using such idle capacity and power of energy storage to participate in the electricity energy market and reserve ancillary service market are explored.A coordinated operation strategy for the three application scenarios of energy storage systems is proposed to improve its utilization.First,the operation scheme of energy storage for the wind power accommodation improvement is studied through an optimal unit commitment problem.Then,the idle capacity and power of energy storage are optimally scheduled to participate in the electricity energy market and reserve ancillary service market,and the operation scheme for the energy storage system is modified.Additionally,when the energy storage system bids for the reserved capacity,enough capacity room is preset to guarantee the reserved capacity is available.The simulation results of case studies show that the proposed method can significantly improve the revenue of energy storage.The effects of initial state of charge,capacity and power of energy storage on the revenue of each application scenario are also analyzed.