摘要
研究了一种应用于风力发电的三相并网逆变器的控制策略,首先建立了两相同步旋转坐标系下三相并网逆变器的数学模型,在此基础上给出了基于空间矢量调制的网侧电流闭环控制策略,实现了电流环的解耦控制和电网电压前馈,提高了系统的动态响应。最后给出了空间矢量调制的算法,仿真和实验结果均表明,采用该控制策略,系统不仅具有快速的动态响应,而且能够提高并网电能质量,实现单位功率因数并网。
A control strategy of three phase grid-connected inverter in wind generation system was studied.First of all,the model of the inverter was built in the two-phase rotating reference frame,then control principle was proposed based on the space vector PWM current control,which realize the decoupled current control and feed-forward of grid voltage.At last,the space vector pulse width modulation method was given.Both simulation and experiments results verify that the proposed control strategy not only improve the dynamic response,but also can improve the quality of grid current and return power to grid with unity power factor.
出处
《电气传动》
北大核心
2010年第12期8-11,共4页
Electric Drive
关键词
并网逆变器
空间矢量调制
电流控制
grid-connected inverter
space vector PWM
current control
