Internal Model Control of DFIG Based Micro Wind Energy Conversion System

Abstract

Amongst the alternative renewable energy sources, the micro wind energy conversion system promises of reliability, cost effectiveness in rural areas where grid power is unavailable for electrification calling for sustainable development. Numerous studies on the control schemes are being conducted to generate electrical energy from the available wind energy using doubly fed induction generator (DFIG). In this paper, the internal model control (IMC) method is used to control rotor currents, speed and stator reactive power of DFIG based wind energy conversion system(WECS). The result is stator flux reference frame proportional integral (PI) or PI-type controllers, and the parameters of the controllers are directly expressed in certain parameters of the DFIG and the desired bandwidth of the close loop. This Process eliminates the trial and error steps to tune the PI controllers during vector control of DFIG. A 1 hp wound type induction generator coupled with 1 kW dc motor is used for the experiment. Performance of the propose single VSC based DFIG has been analyzed under different conditions.