A Novel Contra-Rotating Power Split Transmission System for Wind Power Generation and Its Dual MPPT Control Strategy

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 b...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2017-09, Vol.32 (9), p.6924-6935
Main Authors: Luo, Xiang, Niu, Shuangxia
Format: Article
Language:English
Subjects:
Coils (windings)
Contra-rotating
Control systems
dual-rotor machine
Electric power generation
Energy conversion efficiency
Finite element method
Gears
magnetic flux modulation
maximum power point tracking (MPPT) control
Maximum power tracking
Modulation
Permanent magnets
power split
Rotation
Rotors
Simulation
Stator windings
Strategy
Time stepping finite elements
Torque
Tracking control
Wind power
Wind power generation
wind power generator
Wind speed
Wind turbines
Windings
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Summary: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
1941-0107
DOI:10.1109/TPEL.2016.2629021