2012•Coal Mine MachineryRequires access

Design and Optimize of H_∞ Robust Controller for Voltage-loop of Three-phase PWM Rectifier

Qian Miao-wang

Abstract

This paper proposes a H∞ robust control method for the voltage-loop of three-phase PWM rectifier.Based on the mathematical model of the PWM rectifier,state equations are established for the standard setup of the H∞ robust control problem.Suitable weighting functions are selected for the system.The riccati inequality is solved to derive the H∞ controller.A PSO algorithm is designed to set and optimize the parameters of the controller.And then,the performance of PWM rectifier system is better.Simulation results verify that the proposed H∞ robust control system is suitable for the PWM rectifier and has better external disturbance rejection capability.

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Available abstract

Key concepts: Control theory (sociology), PWM rectifier, Pulse-width modulation, Precision rectifier, Rectifier (neural networks), Weighting, Controller (irrigation), Peak inverse voltage