8.5MW永磁直驱风力发电机突然短路故障仿真

Sudden Short Circuit Fault Simulation of 8.5 MW Permanent Magnet Direct-drive Wind Generator

风能作为一种洁净的可再生能源,随着技术逐步成熟,今后的运行成本会低于水电和火电,其发展前景非常广阔。海上风电由于其资源丰富、风速稳定、对环境的负面影响较少,近年来发展迅速,成为风电产业未来的主要发展方向。海上风电对风力发电机的可靠性、可维护性要求更加严格,国内外许多风电的供应商在海上风电技术路线选择上都是直驱。以8.5 MW海上永磁直驱风力发电机为研究对象,利用有限元场路耦合的方法,对发电机的短路故障工况进行了分析,为发电机端部的绑扎、永磁体的选型和变流器的校核提供重要依据。

As clean and renewable energy gradually matured technologies,wind power has a very broad prospect of development for its lower cost in operation than that of hydropower and thermal power in the future.Offshore wind power due to its abundant resources,stable wind speed,less negative impact on the environment,is developed rapidly in recent years,leading the trend of development of wind power industry.For offshore wind turbine generator the reliabiligy and maintainability is more strict and therefore some customers prefer direct-drive ones for offshore wind power development.This paper takes the 8.5 MW offshore permanent magnet direct drive wind turbine generator as research object,using the method of finite element field circuit coupling,for analyzing the generator fault condition,results of which may provide important basis for verification of design of generator end tie,permanent magnet selection and converter.