电工技术学报2018，Vol.33Issue(6)：1247-1256,10.DOI:10.19595/j.cnki.1000-6753.tces.170436
基于分布式下垂控制的微电网分布式储能系统SOC平衡策略
A Distributed Control Strategy for SOC Balancing of Distributed Energy Storage Systems in Microgrid
摘要
Abstract
When distributed energy storage systems (DESS) in islanded ac microgrid are controlled by conventional P-f droop control, the state-of-charge (SOC) of DESS is unbalanced. In order to balance the SOC of DESS with different capacities, a distributed droop control is proposed in this paper. The SOC balancing in the process of DESS charging and discharging can be realized without frequency deviation by adding a SOC balancing factor to the conventional P-f droop control. The value of SOC balancing factor is 1 after SOC balancing, and the control algorithm changes to the conventional P-f droop control automatically. Since the droop coefficient of conventional droop control is usually very small, the frequency can be kept within the specified range (±1%). Besides, the SOC balancing speed can be adjusted by changing the droop coefficient. Finally, the simulation and experimental results in different conditions show the effectiveness of the proposed scheme.关键词
微电网/分布式储能系统/下垂控制/SOC平衡Key words
Microgrid/distributed energy storage systems (DESS)/droop control/SOC balancing分类
信息技术与安全科学引用本文复制引用
吴青峰,孙孝峰,王雅楠,徐德勋,李昕..基于分布式下垂控制的微电网分布式储能系统SOC平衡策略[J].电工技术学报,2018,33(6):1247-1256,10.基金项目
中国重点研发项目基金(2016YFB0900300),国家自然科学基金(51677162)和河北省自然科学基金(E2015203407、E2017203337)资助项目. （2016YFB0900300）
