电池储能系统并网控制策略及频率调节研究综述

Research Review on Grid-connected Control Strategies and Frequency Regulation of Battery Energy Storage System

随着可再生能源在新型电力系统中的比例不断上升,可再生能源的随机性与波动性以及因电力电子器件的大规模接入所造成的电力系统阻尼与惯性缺失,都严重影响着电力系统的安全稳定。传统的调频机组因其启动时间长、频率响应慢等缺点,已无法满足新型电力系统对频率调节的需求。因此,具有频率支撑能力且响应速率快的电池储能系统受到了广泛关注。为了对电池储能系统参与调频辅助服务进行深入研究,首先,分析了现有电池储能系统的并网控制策略和所受限制;然后,浅析了电池储能系统辅助电力系统实现一次频率调节与二次频率调节的研究现状及改进方向。

With the increasing penetration level of renewable energy in new power systems,the stochastic nature of renewable energy significantly impacts the grid stability and reliability.Simultaneously,the extensive integration of power electronic devices has resulted in decreased damping and inertia within the power system.Due to the shortcomings,such as long starting time and low response rate,the traditional frequency regulation units have been incapable of meeting the frequency regulation needs of new power systems.Therefore,battery energy storage systems(BESS),with their frequency support capability and fast response rate,have drawn considerable attention.The participation of BESS in the auxiliary market has also emerged as a key focus of research.The grid-connected control strategy of BESS is firstly presented,and then the research status of BESS providing primary and secondary frequency regulation services in power systems are analyzed.