中国电机工程学报2017，Vol.37Issue(13)：3746-3754,9.DOI:10.13334/j.0258-8013.pcsee.161527
改进SOC下垂控制的分布式储能系统负荷电流分配方法
Load Current Sharing Method of Distributed Energy Storage Systems by Improved SOC Drooping Control
摘要
Abstract
With the development of distributed generation and DC micro grid,distributed energy storage system has drawn more attention recently.Considering that characteristics of randomness and slow change of the state-of-charge (SOC) of energy storage unit in distributed storage system,this paper proposed the control strategy of SOC power exponent drooping,that is,during the energy storage unit charging and discharging,using SOC power exponent drooping control strategy to improve the resolution of SOC,the drooping curve is smooth and no discontinuous point,improved SOC power exponent is helpful to find the optimal drooping curve make the system quickly converge to identical state.Considering the droop control has an effect on the stability of the system,this paper presented the characteristic equation and the control block diagram of the system,by stable law criterion combining with DC bus voltage drop range verify the stability of the system.The experimental prototype with two storage modules was realized,the stability analysis and the results of experiments were used to validate the proposed droop control method,the drooping coefficients of the SOC power exponent make the system fast converges to identical state and fast distribution of the load current.关键词
直流微电网/分布式储能/负荷分配/SOC幂指数下垂控制Key words
DC microgrid/distributed energy storage/load current sharing/SOC power exponent drooping control分类
信息技术与安全科学引用本文复制引用
李鹏程,张纯江,袁然然,阚志忠,陈宇飞..改进SOC下垂控制的分布式储能系统负荷电流分配方法[J].中国电机工程学报,2017,37(13):3746-3754,9.基金项目
国家自然科学基金项目(51477148).Project Supported by National Natural Science Foundation of China (51477148). （51477148）
