摘要
为了提升微电网的可靠性,提出一种应用于并网微电网具有二次容错能力的可重构逆变器。当逆变器某一桥臂开关器件发生一次故障时,用直流侧电容桥臂代替故障相,逆变器重构成三相四开关拓扑结构,实现一次容错重构;当逆变器非故障相开关器件发生二次故障时,逆变器再次重构成三相四开关拓扑结构,实现二次容错重构。提出了下垂控制-电压电流控制-虚拟阻抗控制-重置脉冲控制算法的复合控制策略,使逆变器实现二次容错控制。仿真结果验证了高可靠性并网微网拓扑结构的正确性与控制策略的有效性。
In order to improve the reliability of microgrid,a reconfigurable inverter with secondary fault tolerance is proposed for grid connected microgrid.When a bridge arm switching device of the inverter has a fault,the DC capacitor bridge arm is used to replace the fault phase,and the inverter reconstructs the three-phase four switch topology to realize a fault-tolerant reconstruction;When the non-fault phase switching device of the inverter has a secondary fault,the inverter reconstructs the three-phase four switch topology again to realize the secondary fault-tolerant reconstruction.A compound control strategy of droop control,virtual impedance control,voltage and current control and reset pulse control algorithm is proposed to realize the secondary fault-tolerant control of the inverter.The simulation results verify the correctness of the topology of the high reliability grid connected microgrid and the effectiveness of the control strategy.
作者
潘修义
岳晓云
胡春香
李智敏
柯鹏程
黎燕
PAN Xiuyi;YUE Xiaoyun;HU Chunxiang;LI Zhimin;KE Pengcheng;LI Yan(Zhejiang Wenzhou Yongjia Electric Power Industry Limited Company,Wenzhou 325100,Zhejiang,China;School of automation,Central South University,Changsha 410083,Hunan,China)
出处
《电气传动自动化》
2023年第2期1-5,10,共6页
Electric Drive Automation
关键词
可重构逆变器
二次重构
下垂控制
虚拟阻抗
Reconfigurable inverter
Double reconstruction
Droop control
Virtual impedance
