储能系统参与多应用场景的协同运行策略

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。

Effect of Market Power in Electricity Markets

The main objective of this paper is to show an overview analysis of market power issues.Market power reflects the scarcity of power supply.It is the ability of a particular seller or group of sellers to maintain prices profitably above competitive levels for a significant period of time.Because the electric power system has its own characteristics that are different to other economic systems,both physical factors and economic factors of power system are key elements on this definition.We study some cases here,including different line limit levels,load levels and bid strategy through a market model based on OPF (optimal power flow) with a decommitment algorithm.