三相电压型PWM整流器的逆系统内模控制

Inner Model Control of Inverse System for Three Phase Voltage Mode PWM Rectifier

三相电压型PWM整流器因其优良的工作特性得到了越来越广泛的应用。但是由于它本身的非线性特性,常规的基于其近似线性模型的控制方法只有在特定的条件下才能正常工作,很难保证系统的全局稳定性。针对这个问题,首先建立了三相电压型PWM整流器的非线性模型,然后利用逆系统理论将系统化为一个两输入两输出的伪线性系统,为了避免由于建模不准和参数漂移引起的系统性能恶化,使用内模控制方法来对伪线性系统进行综合,根据此控制策略可以实现三相电压型PWM整流器的有功功率和无功功率的解耦控制,具有良好的稳态和动态性能。试验结果证明了该控制策略的可行性。

Due to the excellent working features,the three phase voltage mode PWM rectifier had been more widely applied.But due to its nonlinear features,the conventional control method base on the approximate linear model only could be in normal operation under the special conditions and could not ensure the overall stability of the system.According to this problem,a nonlinear model of the three-phase voltage mode PWM rectifier should be firstly set up.Then,with the inverse system theory,the system shall be become a...