摘要
通过对并网逆变器数学模型、电网电压定向矢量控制方法的具体实现过程和相关传递函数的理解,分析了并网逆变器的谐波产生原理,可知在电网电压含有低次谐波畸变时也会产生较大的谐波电流。基于反Park变换的电网电压锁相环可以更好地锁定电压相位,并在LCL滤波器的基础上加入多旋转坐标系下的谐波补偿的电流环控制算法。通过对比仿真分析,该算法能够更好地抑制谐波电流。
Through the mathematic model of grid-connected inverter, the realization process of grid-voltage-oriented vector control method and the related transfer function, he paper analyzes the harmonic generation principle of grid-connected inverter. It can be seen the grid voltage contains low harmonic distortion will have a larger harmonic current. The grid voltage phase-locked loop based on the anti-Park transformation can better lock the voltage phase and add the current loop control algorithm of harmonic compensation under the multi-rotation coordinate system based on the LCL filter. Compared with the simulation analysis, the algorithm can suppress the harmonic current effectively.
作者
张莉
范文杰
Zhang Li;Fan Wenjie(Henan Power Company Pingdingshan Power Supply Company（Henan,Pingdingshan,467000)
出处
《电源世界》
2018年第5期21-26,共6页
The World of Power Supply
关键词
并网逆变器
谐波畸变
锁相环
LCL滤波器
谐波补偿
Grid-connected inverter
Harmonic distortion
PLL
LCL Filter
Harmonic compensation
