Abstract

In this letter, a novel control system for the operation of a doubly fed induction generator (DFIG), feeding an unbalanced three-phase load is presented. The load unbalance is compensated using the front-end converter. The control system is based on two revolving axes, rotating at ±ωe, which are used to control the positive and negative sequence currents supplied by the front-end converter. Experimental results obtained from a 2-kW experimental prototype are presented and discussed in this letter. © 2007 IEEE.