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Title: A novel contra-rotating power split transmission system for wind power generation and its dual MPPT control strategy
Authors: Luo, X 
Niu, SX 
Keywords: Contra-rotating
Dual-rotor machine
Magnetic flux modulation
Maximum power point tracking (MPPT) control
Power split
Wind power generator
Issue Date: 2017
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on power electronics, 2017, v. 32, no. 9, p. 6924-6935 How to cite?
Journal: IEEE transactions on power electronics 
Abstract: This paper proposes a new brushless contra-rotating power split transmission (CR-PST) system for the direct-drive wind power generation. The core element of this system is a doubly fed dual-rotor flux-modulation permanent magnet machine, which has two contra-rotating rotors connected with two wind blades to absorb the wind energy, and two sets of stator windings to realize torque split between the two shafts. This proposed CR-PST system has compact structure and bidirectional flux-modulation design, as well as increased wind power conversion efficiency. Compared with the conventional wind turbine system, which can only work with single maximum power point tracking (MPPT) control strategy, the proposed CR-PST system can collect increased wind energy with dual MPPT method for the given wind speed. Time-stepping finite-element method is used to analyze the steady and dynamic performance of the proposed system and the control strategy is verified by experiments and simulation results.
ISSN: 0885-8993
EISSN: 1941-0107
DOI: 10.1109/TPEL.2016.2629021
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