A Novel Sliding-Mode Observer for Doubly-Fed Induction Generator

Abstract:

This paper proposes a novel sliding-mode model reference adaptive system (MRAS) observers for speed observer in a sensorless controlled doubly fed induction generator (DFIG) aligned with the stator flux. In the strategy, two stator flux models with different structure are used. The stator flux voltage model without including rotor position item is used as reference model, and the stator flux current model including rotor position item as adjustable model. A slide-mode surface is formulated from the errors between the two models, and the rotor speed estimation can be obtained by a sliding mode algorithm. Meanwhile the one order inertial link is used to avoid suffering from integrator drift effects in voltage model. Simulation results confirm the validity of the approach.

• Periodical: Applied Mechanics and Materials (Volumes 511-512)
• Pages: 1105-1109
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.511-512.1105
• Online since: February 2014
• Authors: Qing Long Wang, Min Tan, Shu Ying Yang
• Keywords: Adaptive Sliding-Mode Observer, Double Fed Induction Generation (DFIG), Sensorless, Wind Power

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