电网电压不平衡下储能变流器的控制策略  

Control Strategy of Power Conversion System under Unbalanced Grid Voltage

作　　者：欧名勇 王逸超 刘文军 夏向阳 陈凌彬[2,3] 冷阳 郑楚玉 OU Mingyong;WANG Yichao;LIU Wenjun;XIA Xiangyang;CHEN Lingbin;LENG Yang;ZHENG Chuyu(Economical&Technical Research Institute of State Grid Hunan Electric Power Co.,Ltd.,Changsha 410004,China;Hunan Engineering Research Center of Large-scale Battery Energy Storage Application Technology,Changsha 410004,China;School of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]国网湖南省电力有限公司经济技术研究院,湖南长沙410004 [2]规模化电池储能应用技术湖南省工程研究中心,湖南长沙410004 [3]长沙理工大学电气与信息工程学院,湖南长沙410114

出　　处：《中国电力》2022年第7期93-101,共9页Electric Power

基　　金：国网湖南省电力有限公司科技项目(大规模储能电站电池安全运行及并网调试关键技术研究,5216A220000X);湖南省科技创新平台与人才计划资助项目(2019TP1053)。

摘　　要：电网电压不平衡会导致直流侧电压波动和电网侧有功功率波动,严重影响储能电池系统的安全和能量转换效率。针对上述问题,本文提出了一种直流侧电压与电网侧有功功率协调控制策略。通过考虑储能变流器交流侧滤波电感上吸收的有功功率波动来实现对直流侧电压波动的抑制,再利用加权思想对直流侧电压和电网侧有功功率进行协调控制,较好地降低了两者的波动幅值。仿真实验结果验证了所提方法的有效性与优越性。Unbalanced grid voltage will cause voltage fluctuations on the DC side and active power fluctuations on the grid side,which seriously affects the safety and energy conversion efficiency of the energy storage battery system.Aiming at the above problems,this paper proposes a coordinated control strategy of DC side voltage and grid side active power.Firstly,by considering the active power fluctuation absorbed by the filter inductor on the AC side of the power conversion system,the suppression of the voltage fluctuation on the DC side is realized;Then,the weighted idea is used to coordinately control the voltage on the DC side and the active power on the grid side,and the fluctuation amplitude of the two is well reduced;Finally,the effectiveness and superiority of the proposed method are verified in the simulation.

关 键 词：储能变流器 电网电压不平衡 直流侧电压波动 电网侧有功功率波动 协调控制 储能系统安全 

分 类 号：TM46[电气工程—电器] TM91