大兆瓦等级中速永磁风力发电机电磁激振谐响应分析

Electromagnetic Excited Harmonic Response Analysis of Medium Speed Permanent Magnet Wind Turbine with Large Megawatt Grade

半直驱风力发电机具有中速永磁的特点,与成熟的直驱永磁发电机相比,在转速、频率、结构、永磁固定方式、冷却方式及通风结构都存在很大不同。它兼顾了直驱的可靠、高效和双馈的低成本、小体积等优势,在近年风电整机价格的持续走低的背景下,有了较快的发展和提升。半直驱风力发电机电磁激振谐响应分析因为具有多学科耦合、建模复杂等特点,研究难度较高。本文通过对大兆瓦等级中速永磁风力发电机的设计研究,形成了电磁激励载荷的分析与提取、机电耦合分析模型的简化与建立、谐响应分析、真机试验测试对比等一整套方法,系统解决了电磁激振谐响应分析的难题。

The electromagnetic excited harmonic response analysis of semi-direct drive wind turbine is very difficult due to its multi-disciplinary coupling and complex modeling.In this paper,a complete set of methods are formed through the design and research of the medium speed permanent magnet wind turbine with large megawatt grade,such as analysis and extraction of electromagnetic excitation load,simplification and establishment of elector-mechanical coupling analysis model,harmonic response analysis,real machine test and comparison,which systematically solves the difficult problem of electromagnetic excitation harmonic response analysis.