摘要
单相H6桥逆变器具有结构简单、效率高以及共模干扰低等优点。通过滤波器延时构造交流信号的虚拟正交相,将单相交流量变换到同步坐标系成为直流信号,采用PI控制器进行电流环调节,以消除控制的静态误差。为提升逆变器的谐波抑制能力,引入了重复控制,与PI控制共同组成复合控制器。在MATLAB/Simulink对单相H6桥逆变器的复合控制模型进行了仿真,并进行了实验验证。实验结果表明,PI与重复控制组成的复合控制器可以有效抑制各次电网谐波,提升电能质量。
The single-phase H6 bridge inverter has the advantages of simple structure,high efficiency,and low common mode voltage.The virtual quadrature phase of the AC signal is constructed through the filter delay,the singlephase AC quantity is transformed into the synchronous coordinate system to become the DC signal,and the current loop is adjusted by the PI controller.In order to improve the harmonic suppression capability of the system,repetitive control(RC)is introduced,which forms a composite controller with PI control.The compound control model of single-phase H6 bridge inverter was simulated in MATLAB/Simulink and verified by experiments.Experimental results show that the composite controller composed of PI and RC can effectively suppress the harmonics of the power grid and improve the power quality.
作者
李党盈
常亚婷
LI Dangying;CHANG Yating(Xi'an Stropower Technologies Co.,Ltd.,Xi'an 710075,China)
出处
《通信电源技术》
2021年第3期27-30,34,共5页
Telecom Power Technology
关键词
单相并网逆变器
H6拓扑
重复控制
复合控制
single-phase grid-connected inverter
H6 topology
repetitive control
compound control
