无差拍控制在光伏并网发电系统中的应用

Implementation of a Deadbeat Current Controller for Photovoltaic Grid-Connected Inverters

光伏发电系统输出功率的大小和质量易受外部环境的影响,为了使系统能够最大限度地输出高质量的电能,就需要一种快速的电流控制方法控制逆变器工作。在分析了无差拍电流控制方法工作原理的基础上,给出了参考电流的获取及占空比的计算过程,并将无差拍电流控制应用到两级式单相光伏并网发电系统逆变器的控制中。实验结果表明,该方法具有良好的稳态特性和动态特性。

To meet the requirement of the output power of photovohaic （PV） grid-connected power generation system, the inverter should be controlled according to the output power of PV arrays.The deadbeat current control is analyzed in detail.The way how to get the reference current and the duty cycle of converter is presented.The simulative and experimental results show the output power of PV inverter has good quality with the deadbeat current control.