Fictitious Power Based MRAS Observer for Sensorless Control of Stand-Alone Brushless Doubly-Fed Induction Generators

The aim of this paper is to design a sensorless voltage control strategy based on model reference adaptive system (MRAS) for brushless doubly-fed induction generators (BDFIGs) in the ship shaft stand-alone power generation applications. The proposed method is based on the power winding (PW) field-oriented control and the functional quantity of control winding (CW) fictitious power. The proposed sensorless control system ensures the efficacy and simplicity due to the absence of the flux computation process. Comprehensive simulation and experimental results based on a wound-rotor BDFIG are presented, which validates the good dynamic performance during various operations for BDFIGs in stand-alone systems.