Abstract
Robust predictive control is presented in this article using a three-vector modulation for a grid-connected three-phase inverter. The aims of this article are proposing a robust controller that is able to deal with some variations of parameters that occur in practical systems and demonstrating the performance of the controller with experimental tests that change the inductance and consequently the parasitic resistance of the plant; the same controller can predictive the changes to obtain the optimal performance. The article also presents mathematical modeling for plants and controllers and a modulation method to solve the variable frequency problem. Experimental tests corroborate the expected results and validate the controller’s efficiency according to the control system analysis requirements and the IEEE 1547.2-2008 standard.
Highlights
In recent years, the decrease of CO2 emissions from power generation has been the main concern to improve the environment [1]
The following subsections will approach the parameter variation to demonstrate the controller robustness and the total harmonic distortion (THD) to evaluate the quality current injected to the grid
A predictive robust controller and its practical implementation were presented in the article
Summary
The decrease of CO2 emissions from power generation has been the main concern to improve the environment [1]. In common with the many ways to generate energy, grid-connected inverters are frequently found in this type of system to regulate the grid voltage or frequency. The grid-connected inverters are devices that can integrate the electrical grid to the renewable energy source for distributed generation (DG) systems [2]. The authors in [4] propose a controller that through grid current feedback active damping can provide the desired bandwidth and robustness against the parameter variation. Another type of controller that can be considered uses a proportional and integral controller with the resonant part that can achieve zero steady-state error [5]. All of them can be single-input and single-output (SISO) and multiple-input-multiple-output (MIMO) [6]
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