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Sensorless Control for Electrical Variable Transmission Based on Sliding Mode Model Reference Adaptive System
Author(s): 
Pages: 64-72
Year: Issue:  2
Journal: Transactions of China Electrotechnical Society

Keyword:  Electrical variable transmission(EVT)sliding modemodel reference adaptive system(MRAS)sensorless controlwind energy conversion system(WECS);
Abstract: A novel sensorless control based on the sliding mode(SM) model reference adaptive system(MRAS) observer is proposed for the electrical variable transmission(EVT) which is applied for the dual power flow wind energy conversion system(WECS). The SM technique replaces the proportional-integral(PI) controller existing in the traditional MRAS technique by combining the MRAS with the SM. The proposed SM-MRAS strategy selects the flux linkage model as the adjustable model instead of the traditional current model to simplify the algorithm. Furthermore, the improved SM strategy is applied for the SM-MRAS based on the multi-sectional speed switch method which is proposed to avoid the chattering phenomena existing in the traditional SM control. The experimental platform of the dual power flow WECS is built to verify the effectiveness of the proposed improved SM-MRAS strategy. Furthermore, the proposed SM-MRAS strategy is compared with the traditional MRAS strategies in the experiments.
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