三相四线制APF改进型矢量谐振控制策略

An Improved Vector Resonant Control Strategy for Three-phase Four-wire APF

提出一种基于改进型矢量谐振控制(VRC)的三相四线制有源电力滤波器(APF)新型非谐波检测控制策略。利用网侧电流和逆变器直流母线电压作为状态变量,建立具有分裂电容结构的数学模型。该控制策略无需谐波探测器,可直接对网侧电流进行检测和补偿,既可保证补偿精度又能改善系统动态响应特性。通过对电流环进行改进,使其具有更好的频率响应和稳定裕度。最后,对数学模型进行仿真,并成功搭建样机进行实验。

An advanced non-harmonic detection control strategy for three-phase four-wire active power filter（APF） is proposed based on improved vector resonant control（VRC）.The mathematical model of the split-capacitor configuration is established with the source currents and the direct current bus voltage as state variables.The proposed control scheme can directly detect and regulate the source currents without harmonic detectors, which could ensure the accu- racy of the compensation and could improve the dynamic response of the system.The current loop controller is im- proved,which has superiority of frequency adaptation and stability margin.Finally,all mathematical models are simu- lated, and a prototype is implemented to carry out the experimental verification is successfully.