Electromechanical Cooperative Design of Permanent Magnet Synchronous Generator-gear Transmission System for Improving Annual Cycle Efficiency

doi:10.3901/JME.2024.01.296

Abstract

Abstract: In order to achieve the design goals of lightweight and high annual cycle efficiency of permanent magnet synchronous wind turbine, an optimization design method of electromechanical cooperative parameters of permanent magnet synchronous generator-gear transmission system is proposed. Firstly, the calculation model of wind turbine is established and the annual wind speed measured by wind farm is taken as the operating condition of wind turbine. Then, the loss model of the gear transmission system is established, and the saturation flux model, torque model and loss model of the permanent magnet synchronous generator are established based on the finite element method. On this basis, in order to maximize the efficiency potential of wind turbine under each parameter, the nonlinear efficiency optimal current distribution strategy is used to optimize the control current of the generator. Finally, under the conditions of generator electromagnetic constraints, gear geometry and strength constraints, and continuous transmission constraints, the parameters of the generator and gear are taken as the optimization variables, and the total mass of the permanent magnet synchronous generator-gear transmission system and the total loss under the annual cycle wind speed condition are taken as the objective functions. NSGA-Ⅱ algorithm is used to optimize the objective function. The optimization process includes internal nested optimization, and the whole process is run automatically through the script, which minimizes the loss and weight of the system and reduces the time cost. Based on the above method, the 8 MW permanent magnet synchronous generator-gear transmission system is optimized. After optimization, the total mass of the system is reduced by 40.2%, and the annual cycle loss of the system is reduced by 461 562.53 kW·h, indicating that the method effectively reduced the mass of the system and improved the annual cycle efficiency.

Key words: permanent magnet synchronous wind turbine, lightweight, annual cycle efficiency, electromechanical collaborative design, parameter optimization

CLC Number:

TK83

LI Zhengqi, LIU Changzhao, SONG Jian, WANG Lei. Electromechanical Cooperative Design of Permanent Magnet Synchronous Generator-gear Transmission System for Improving Annual Cycle Efficiency[J]. Journal of Mechanical Engineering, 2024, 60(1): 296-308.

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