Power Quality Analysis of Wind Turbines. Part I – Static Analysis

Abstract

This paper shows a study on Power Quality (PQ) analysis of Wind Turbines (WT) installed in wind farms. A specifically designed measurement system has been installed in three wind farms with three different types of asynchronous generators of 600 kW and 700 kW classes.

– Conventional, squirrel cage induction generator directly connected and with fixed pitch (SQIG).

– Wound rotor, induction generator with external variable resistance and variable pitch (VRIG).

– Doubly fed asynchronous generator with external variable resistance and variable pitch (DFIG).

This part shows static relationships among active and reactive power, voltage drops and harmonics. In the second part, a dynamic study has been performed, focused on transient, connection and disconnection events.