Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

Article retrieval

文章检索

首页 >> 文章检索 >> 最新索引

考虑SOC 一致性的储能变流器集群动态下垂控制方法

来源:电工电气发布时间:2025-09-26 14:26 浏览次数:1

考虑SOC 一致性的储能变流器集群动态下垂控制方法

郭文骏,许兴元,陈晓杭,丁佳钰,李连臣
(广东电网有限责任公司广州增城供电局, 广东 广州 510000)
 
    摘 要:储能系统可平滑新能源间歇性波动,但多储能系统并联时,电池荷电状态(SOC)差异会导致容量利用率降低及过充、过放问题,影响电池寿命和系统安全性。提出一种基于 SOC 一致性的储能变流器集群动态下垂控制方法,通过优化传统下垂控制策略,设置 SOC 偏差阈值,将 SOC 均衡分为快速调节与精确调节两阶段,并动态调整下垂系数,实现多储能系统间的 SOC 均衡控制。在 MATLAB/Simulink 软件中搭建两台并联储能系统仿真模型,验证结果表明,该方法在不同运行条件下均能有效实现 SOC 均衡,显著提升系统容量利用率与运行可靠性,为新型电力系统储能协同控制提供了有效技术方案。
    关键词: 储能系统;SOC 均衡;线路阻抗;动态下垂控制
    中图分类号:TM46 ;TM911     文献标识码:A     文章编号:1007-3175(2025)09-0018-11
 
Dynamic Droop Control Method for Energy Storage Converter
Clusters Considering SOC Consistency
 
GUO Wen-jun, XU Xing-yuan, CHEN Xiao-hang, DING Jia-yu, LI Lian-chen
(Guangzhou Zengcheng Power Supply Bureau, Guangdong Power Grid Co., Ltd, Guangzhou 510000, China)
 
    Abstract: Energy storage systems can smooth out the intermittent fluctuations of new energy, but when multiple energy storage systems are connected in parallel, differences in the state of charge (SOC) of batteries can reduce capacity utilization and cause overcharge/overdischarge issues, affecting battery life and system safety. To address this, this paper proposes a dynamic droop coordinated control method for energy storage converter clusters based on SOC consistency. By optimizing the traditional droop control strategy, an SOC deviation threshold is set. The SOC balancing process is divided into two stages: fast regulation and precise regulation, with dynamic adjustment of droop coefficients,this approach achieves SOC balancing control among multiple energy storage systems. Build a simulation model of two parallel energy storage systems in MATLAB/Simulink, the results show that this method effectively balances SOC under different operating conditions,significantly improving system capacity utilization and operational reliability, and providing an effective technical solution for energy storage coordinated control in new power systems.
    Key words: energy storage system; SOC balance; line impedance; dynamic droop control
 
参考文献
[1] 李冰,李岚,王浩,等. 一种改善直流微电网负荷电流分配的下垂控制[J] . 电力科学与技术学报,2022,37(1) :48-54.
[2] 米阳,蔡杭谊,袁明瀚,等. 直流微电网分布式储能系统电流负荷动态分配方法[J] . 电力自动化设备,2019,39(10) :17-23.
[3] 郭向伟,耿佳豪,刘震,等. 基于反激变换器的双目标直接均衡方法[J] . 电工技术学报,2021,36(6) :1269-1278.
[4] 熊飞,吴俊勇,段青,等. 一种适用于级联 H 桥储能变换器的相内功率分配控制策略[J]. 中国电机工程学报,2019,39(6) :1732-1748.
[5] CASPAR M , EILER T , HOHMANN S . Systematic Comparison of Active Balancing:A Model-Based Quantitative Analysis[J].IEEE Transactions on Vehicular Technology,2016,67(2) :920-934.
[6] 李勇琦,陈满,伍科,等.H 桥级联电池储能系统四级均衡控制研究[J]. 太阳能学报,2019,40(5) :1291-1297.
[7] WU Qingfeng, SUN Xiaofeng, HAO Yancong, et al.A SoC control strategy based on wireless droop control for energy storage systems in ac islanded microgrid[C]//2016 IEEE 8th International Power Electronics and MotionControl Conference(IPEMC-ECCE Asia),2016 :2893-2898.
[8] 明远山,胡慧慧,刘凯旋,等. 孤岛模式下直流微网中储能单元 SOC 均衡控制策略[J]. 电力科学与技术学报,2023,38(4) :57-64.
[9] 陈勃旭,崔炜,陈宇,等. 分布储能直流微电网中多储能荷电均衡控制策略[J] . 电力系统保护与控制,2023,51(24) :111-120.
[10] XU Dezhi, XU Anjie, YANG Chengshun, et al.A Novel Double-Quadrant SoC Consistent Adaptive Droop Control in DC Microgrids[J].IEEE Transactions on Circuits and Systems Ⅱ :Express Briefs,2020,67(10) :2034-2038.
[11] GUAN Yajuan, MENG Lexuan, LI Chendan, et al.A dynamic consensus algorithm to adjust virtual impedance loops for discharge rate balancing of AC microgrid energy storage units[J].IEEE Transactions on Smart Grid,2017,9(5) :4847-4860.
[12] ZHANG Qinjin, ZENG Yuji, LIU Yancheng, et al.An improved distributed cooperative control strategy for multiple energy storages parallel in islanded DC microgrid[J].IEEE Journal of Emerging and Selected Topics in Power Electronics,2022,10(1) :455-468.
[13] 孙孝峰,郝彦丛,王宝诚,等. 微电网分布式储能单元荷电状态平衡和电压恢复[J] . 中国电机工程学报,2016,36(15) :4047-4054.
[14] 米阳,蔡杭谊,宋根新,等. 考虑不匹配线阻的分布式储能单元荷电状态均衡研究[J] . 中国电机工程学报,2019,39(15) :4441-4450.
[15] 吴青峰,褚晓林,于少娟,等. 基于改进型 P-E 下垂控制的低压交流微电网不同容量储能单元 SOC 均衡策略[J]. 太阳能学报,2023,44(4) :266-275.
[16] 袁娜娜,王允建,张君,等. 直流微网中基于 SOC 的改进下垂控制[J] . 电力系统保护与控制,2019,47(15) :17-23.
[17] 宋昕一,徐永海,袁敞,等. 孤岛直流微电网的多储能 SOC 稳定均衡控制策略[J] . 电力系统保护与控制,2024,52(20) :49-59.
[18] LI C, COELHO E, DRAGICEVIC T, et al.Multiagentbased distributed state of charge balancing control for distributed energy storage units in AC microgrids[J].IEEE Transactions on Industry Applications,2017,53(3) :2369-2381.