Conventional Asynchronous Wind Turbine Models Mathematical Expressions for the Load Flow Analysis

Abstract

Asynchronous wind turbines (WT) have been among the most used type of converters in wind energy plants. Conventional asynchronous WTs were installed during the first years of wind energy research, but doubly-fed induction generator (DFIG) WTs and other types have also been added for current and future use. So, the massive presence of such machines in electrical networks means it is important to develop dynamic and steady-state models to describe their behaviour. This paper presents a review of steady-state models of asynchronous WTs for the load flow analysis (LF) that have been presented in recent years. A large number of conventional asynchronous WTs can still be found in electrical systems in many different countries all over the world. This fact constitutes a reason for the authors not to overlook them when studying the operation of such systems. In addition, there has been some discussions about these models over the last few years. Keywords-Asynchronous Wind Turbine; Load Flow Analysis; Newton-Raphson.