摘要
链式电池储能变流器接入不平衡电网时,为了控制网侧各相电流对称,变流器各相储能电池簇与电网交换的有功功率不相等,这会造成储能系统各相储能电池簇荷电状态不均衡。研究了链式储能变流器在电网电压不平衡时的控制策略和采用零序电压注入的各相电池簇荷电状态均衡控制方法。通过仿真验证了控制策略的有效性。
When the cascaded Hbridge battery energy storage converter is connected to unbalanced grid, in order to balance the grid phase current, the active power communicated between the grid and three phase battery clusters are unequal, which can cause state ofcharge unbalance among three phase battery clusters. The control scheme of cascaded H bridge battery energy storage converter under unbalance grid voltage condition was researched, and the phase battery clusters state of change（SOC）balance method which is realized through zero sequence voltage injection was also researched. Simulation results verify the validity of the control scheme.
出处
《电气传动》
北大核心
2013年第5期20-23,共4页
Electric Drive
基金
国家高技术研究发展计划(863计划)(2011AA05A111)
关键词
链式变流器
电网不平衡
零序电压
cascaded H-bridge converter（CHB）
unbalance condition
zero sequence injection
