风力发电并网逆变器的前馈解耦控制

Feedforward Decoupling Control of Wind Power Generation Grid-connected Inverter

研究了风力发电三相并网逆变器的前馈解耦控制.根据基尔霍夫电压定律建立了逆变器的三相静止坐标系的数学模型;通过坐标变换得出了d-q坐标系下逆变器的数学模型.给出了基于空间矢量的电流前馈控制策略,并实现了并网电流有功分量和无功分量的独立控制.研究了α-β坐标系下的直接计算法锁相.通过实验证明,采用该控制策略可以实现单位功率因数并网.

This paper discusses the feedforward decoupling control of wind power generation three-phase grid-connected inverter.In the first instance,according to Kirchhoff Voltage Law,a mathematical model of the three-phase stationary coordinate system of the inverter is established.Then,by coordinate transformation,the mathematical model under d-q coordinate system is obtained.Also,the current feedforward control strategy based on the space vector is given.Finally,the direct calculation method under α-β coordinates is studies.Experimental results show that grid-connection can be achieved by this control strategy.