改进型电压预测控制逆变器的研究

Study of Improved Predictive Voltage Controlled Inverter

为了研究在边远地区使用小型离网独立风力发电系统,在分析比较现有独立风机供电变流系统结构和控制方法的基础上,给出了新型独立风机供电系统结构和改进型电压预测控制算法。新型独立风机供电系统通过在结构上增加一个旁路二极管,大大提高了系统对风能的利用率;改进型电压预测控制通过在一个PWM周期内增加采样的次数来改善系统的控制效果和动态响应,使负载电压的总谐波畸变率(THD)达到3.5%。仿真和实验研究结果证明了改进型电压预测控制方法的正确性和可行性。

The small stand-alone wind power generation system is one of the key methods to resolve the electricity lack for peoples who live in the outlying regions.This paper gives a kind of novel integrated stand-alone wind turbine system and improved predictive voltage control arithmetic based on analysis of traditional stand-alone wind turbine system and predictive voltage control arithmetic.The novel integrated stand-alone wind turbine system can improve the utility factor with a pass-by diode.Improved predictive voltage control arithmetic can improve control effects and dynamic response via increase sampling times in a PWM periods.The total harmonic distorsion（THD） of load voltage can reach 3.5%.The simulative and experimental results prove the feasibility and effectiveness.