Optimal energy switching strategy for doubly fed VSD using fuzzy - Decision control algorithm

Abstract

Advancement of Variable Speed Drive (VSD) technology possesses energy efficient dynamic control. As well as, the doubly fed asynchronous machine based VSD suits for different variable speed applications due to its effective controllability with partial rated power converters. To improve the performance of the doubly fed system in the aspect of cost effective energy saving, a fuzzy logic controller based switching strategy is introduced in this paper. The proposed energy optimal fuzzy switching strategy overcomes the traditional model based control and it is flexible to adopt in any existing doubly fed VSD without any extensive modification. The developed system has been implemented and tested in the laboratory with a 2.2 kW doubly fed machine that provides an effectual result in power factor improvement and reduction in energy consumption. © IEEE.