Sistema de geração eólica com filtragem ativa usando a teoria de potência instantânea conectado a uma rede elétrica com tensão distorcida

Abstract

In this paper we describe a strategy that allows the addition of active filtering functionality to a wind energy conversion system with doubly-fed induction generator connected to a distorted voltage grid. The active filtering is performed through an algorithm that uses the mathematical formulation of the instantaneous power theory to generate control references applied to the current control loop in the grid side converter. The wind energy conversion system that uses the instantaneous power theory to mitigate harmonic currents, allows to improve the quality of electrical energy in electrical systems, where non-linear loads are connected simultaneously with the generation of electricity at different points of operation. We present the active and reactive power control of the GIRB, performed through the orientation technique of the vector magnetic flux of the stator. The simulation results confirm the possibility of adding the active filtering function in GIRB wind systems using the instantaneous power theory, reducing the THD of the electric current in the grid to less than 5% with the system connected in a bus with the distorted voltage.