规模化储能系统参与电网调频的控制策略研究

传统的火电与水电调频机组因其固有特性难以满足电力系统快速发展、新能源发电集中并网等引起的频率稳定控制需求,储能以其灵敏精准的出力特性逐步在电力系统调频领域中实现了规模化应用。针对规模化储能资源响应速度快、跟踪精度高、调节方向易改变及有限的容量等特点展开了其参与电网调频的控制策略研究:首先,建立了区域电网自动发电控制(AGC)系统及包含储能荷电状态(SOC)的储能系统仿真模型;然后,综合考虑储能资源与常规电源的发电特性,提出了计及储能SOC的快慢速调频资源协调控制策略;最后,搭建了4种不同的仿真场景,通过仿真试验对提出的控制策略的有效性进行了验证。

Frequency regulation strategy for power grid incorporating large-scale energy storage

Traditional thermal power plants and hydro-power plants are difficult to deal with the problem of frequency stability caused by the rapid development of power system and the generation and parallelling in grid of renewable energy, while large-scale energy storage is applying itself in frequency regulation in power system for its characteristics of swiftness and accuracy. Energy storage system (ESS) has advantages of fast response speed, high following precision and easy-changing adjust direction, which has disadvantage of limit capacity, either. Considering the characteristics of ESS, control strategy of ESS participating in AGC is studied. Firstly, power grid AGC system model and ESS model including state-of-charging(SOC) is established. Then, with comprehensively considering the characteristics of ESS and conventional power resources, a coordination strategy between fast and slow regulation sources is proposed. Finally, three different scenarios is designed, and the efficiency of the proposed strategy is demonstrated through the sets of simulation tests.