基于无源性及d-q坐标变换电流控制的三相光伏并网控制系统研究

Three-phase Photovoltaic Grid-connected Control System with Passivity and d-q Coordinate Transformation

光伏并网逆变器作为光伏并网发电系统与电网接口的主要设备,其控制技术已成为研究的热点。本文介绍了无源性及dq坐标变换的控制原理,设计了基于无源性及dq坐标变换的电流控制并网控制策略,最后,在MATLAB/SIMULINK环境下进行了系统的建模与仿真。仿真结果表明输出并网电流波形良好、和电网电压同频同相。

The grid-connected inverters control technology becomes a research hotspot,because the inverter is an important equipment,which connects the photovoltaic grid-connected system and the grid.At first,the principle of the d-q coordinate transformation and passivity are introduced,and then a grid-connected current control strategy based on passivity and d-q coordinate transformation is designed.Finally,the modeling and the simulation of the system based on MATLAB/SIMULINK environment are presented.The experimental result verifies that the output wave of gird-connected current is good,and it has the same frequency and phase as utility grid.