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This paper presents a novel full discrete sliding mode controller for voltage-sourced three phase rectifier to improve its dynamic response under the load and dc link voltage variation. Using the concept of power balance in three phase rectifier, the sliding mode controller for dc link voltage regulation is derived. Also, in order to avoid the additional load current sensor, a new method to estimate...
A two stages robust Generalized PI feedback controller for a single-phase active multilevel rectifier is proposed. The controller is based on the system modeled in the d-q synchronous reference frame. Based on input-output linearization theory a current controller that decouples the d-q components and compensates unknown perturbations is obtained. Performing a transformation of the system, stability...
The mathematic model of three-phase pulse-width modulated (PWM) voltage rectifiers is nonlinear, strong coupling. And the mathematic model error, time-varying uncertainties and external disturbance will influence the performance of the system. This paper presents a linear quadratic regulator (LQR) for the inner current loop control without decoupling, and a robust H∞ control method for the outer voltage...
In this paper an average current sharing mu-based robust controller for parallel multi-inverter systems is presented. There is one common output voltage controller to achieve low total harmonic distortion (THD) and good regulation. Each inverter module has also a robust current controller to track the averaged output current. This loop provides equal current distribution between inverters. The command...
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