摘要
三相逆变器在较重的不平衡负载影响下输出的电压波形会畸变。基于三相四桥臂逆变器给出了解决这一问题的控制策略。使用90°对称分量法对各序电压进行分解,分解后的正序与负序分量使用双闭环PI方法进行控制,零序分量则采用虚拟构造αβ坐标系进行控制,最后用三维空间电压矢量调制算法(3D-SVPWM)产生控制脉冲驱动四桥臂逆变器。仿真结果证实了控制策略的有效性,三相四桥臂逆变器在带三相不平衡负载的情况下输出也是均衡的。
The output voltage waveform of three-phase inverter will be distorted under the influence of heavy unbalanced load.This paper presents a control strategy to solve this problem based on three-phase four leg inverter.The 90 degree symmetrical component method is used to decompose each sequence voltage,the decomposed positive sequence and negative sequence components are controlled by double closed-loop PI method,and the zero sequence component is constructed by virtual structureα-βFinally,the four leg inverter is driven by the control pulse generated by the three-dimensional space voltage vector modulation algorithm(3D-SVPWM).The simulation results confirm the effectiveness of the control strategy,and the output of the three-phase four leg inverter is balanced under the condition of three-phase unbalanced load.
作者
豆童童
邱楠
孔德贺
DOU Tongtong;QIU Nan;KONG Dehe(School of Locomotive and Rolling Stock Engineering,Dalian Jiaotong University,Dalian 116028,China)
出处
《电工技术》
2022年第20期175-178,共4页
Electric Engineering
