Active- and reactive-power control for a wind generator connected to the grid using a predictive-integral control and a PI control schemes

Abstract

This paper investigates the control of the active and reactive power injected into the grid by a variablespeed wind generator. Two different control schemes are studied to achieve a decoupled control of the active and the reactive power. First of all, a classical PI controller designed by means of the poleplacement technique is investigated. Secondly, a predictive-integral controller is realised. The objective of both control schemes has been set to obtain a deadbeat system. The design of these control systems is developed in discrete time and a thorough comparison of both methods is carried out by studying their transient responses, steady states and robustness properties. Simulation results are presented to validate the main contributions of this work.

This paper investigates the control of the active and reactive power injected into the grid by a variablespeed wind generator. Two different control schemes are studied to achieve a decoupled control of the active and the reactive power. First of all, a classical PI controller designed by means of the poleplacement technique is investigated. Secondly, a predictive-integral controller is realised. The objective of both control schemes has been set to obtain a deadbeat system. The design of these control systems is developed in discrete time and a thorough comparison of both methods is carried out by studying their transient responses, steady states and robustness properties. Simulation results are presented to validate the main contributions of this work.