Performance comparison of DFIG and SCIG based wind energy conversion systems

Abstract

Increasing penetration of wind energy in existing conventional energy systems necessitate better power quality and control. The power electronics is advancing very fast and this facilitates the rapid growth of variable speed wind energy conversion systems (WECS). However, the issue of power quality needs a thorough attention of the people involved in research work. This paper is focusing mainly on the performance comparison of WECSs using doubly fed induction generator (DFIG) and squirrel cage induction generator (SCIG) where both types of WECSs are using similar kind of the control strategies. The aim of this comparison study is to present various aspects of power quality, especially at the point where the WECS is connected to the grid, in a logical manner. This study also aims to find minimum and maximum wind speeds at which these generators can be operated and power generated by these generators at varying wind speed. Both the Energy conversion systems are using vector control technique. In order to harness maximum power at a particular wind speed, maximum power point tracking has been implemented in both the systems.