三相链式储能变换器相间SOC均衡最大环流功率控制  

Maximum Circulating Current Power Control for Phase-to-phase SOC Balance Applied to Three-phase Chain-link Energy Storage Converter

作　　者：杨春来 袁晓磊 郝伟杰 殷喆 李剑锋 阚志忠[2] YANG Chunlai;YUAN Xiaolei;HAO Weijie;YIN Zhe;LI Jianfeng;KAN Zhizhong(Electric Power Research Institute,State Grid Hebei Electric Power Co.,Ltd.,Shijiazhuang 050021,China;Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]国网河北省电力有限公司电力科学研究院,石家庄050021 [2]燕山大学电力电子节能与传动控制河北省重点实验室,秦皇岛066004

出　　处：《电源学报》2025年第2期75-85,共11页Journal of Power Supply

基　　金：国网河北省电力有限公司科技项目(kj2021-047)。

摘　　要：三相链式储能变换器可提高电网中风、光等可再生能源功率的可控性。针对三相输出链式储能变换器相间储能电池荷电状态SOC(state-of-charge)不均衡问题,提出相间环流功率闭环控制实现相间储能电池SOC均衡方法,通过向a、b、c相注入零序电压在相间产生有功环流功率实现三相储能电池组的SOC均衡,在建立链式储能变换器相间最大有功环流功率与SOC偏差数学模型基础上,通过相间环流有功功率闭环控制使得系统以最大环流功率进行相间电池组SOC均衡,实现相间SOC均衡速度最大化,从而加快相内SOC均衡速度。最后通过MATLAB的仿真模型和实验平台验证了所提出方法的正确性和可行性。Three-phase chain-link energy storage converters(TPCLESCs)are promising in enhancing the controllability of renewable energy in power grid,such as wind and solar power.Aimed at the problem of state-of-charge(SOC)imbalance of energy storage battery among phases of a TPCLESC,a phase-to-phase SOC balance method based on phase-to-phase circulating current power closed-loop control is proposed.Through the zero-sequence voltage injection into phases a,b and c,the active circulating current among phases is generated to realize the SOC balance in the three-phase energy storage battery groups.A mathematical model of the maximum phase-to-phase circulating current power of the chain-link energy storage converter and SOC deviation is established.On this basis,the phase-to-phase SOC balance in battery groups is realized at the maximum circulating current power through the phase-to-phase circulating current active power closed-loop control.As a result,the phase-to-phase SOC reaches its balance at the maximum speed,and the process of phase-to-phase SOC balance is accelerated.Finally,the correctness and feasibility of the proposed method were verified by a MATLAB simulation model and an experimental platform.

关 键 词：注入零序电压 荷电状态均衡 并网系统 相间环流功率 

分 类 号：TM46[电气工程—电器]