Estruturas de controle de conversores para sistema de geração eólico conectados à rede elétrica.

Abstract

Given the importance of wind farms to meet the technical standards as specified in accordance with the region where they will be installed, it is necessary to study the power converters connected to the grid, and the control strategy to perform the frequency control and voltage regulation, active and reactive power control and provide quick responses during transient and dynamic situations in the power system. This paper presented and discussed, using simplified network and converter models, two operating modes corresponding to the DC system: when the converter is connected to the grid and when it is disconnected from the network. These two operating modes correspond to different applications and lead to different dynamics requiring different controller desings.Based on the DC network case, and using the Clarke-Park transformation, where the alternating voltage and current variables are transformed into constant references in the dq axis, it was designed a power controller for the AC network case.