直驱式永磁风力发电机运行特性有限元分析研究  

Research on Operational Characteristics of Direct-Drive Permanent Magnet Wind Generator Based on Finite Element Method

作　　者：张健 姚丙雷[2] 陈伟华[2] 刘义杰 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206 [2]上海电器科学研究所(集团)有限公司,上海200063 [3]山西漳山发电有限责任公司,山西长治046021

出　　处：《电机与控制应用》2014年第2期39-44,共6页Electric machines & control application

基　　金：中央高校基本科研业务费专项资金资助(JB2013090)

摘　　要：针对直驱永磁风力发电机结构相对复杂,现阶段磁路法分析不够准确、数值分析方法应用不是特别充分的问题,以Ansys为分析工具建立了同时考虑永磁直驱风力发电机和外电路特性的场路耦合模型,得到了能够研究电机空载、负载及非正常运行等不同工况的一体化分析模型。以一台1.5 MW永磁直驱电机为例,使用场路耦合时步有限元法,建立了半单元电机模型,计算了其空载、负载功角性能,以及突然短路时的永磁体退磁特性。通过对比仿真与实测得到的相关曲线,发现其吻合较好,证明了该时步有限元分析模型具有良好的计算精度,可为永磁直驱电机的准确性能计算提供参考。For direct-drive permanent magnet wind generator （ DDPMG） structure being relatively complex, at this stage, the analysis method based on magnetic circuit was not accurate enough, and the application of numerical analysis method was not particularly full. Taking Ansys as a powerful tool, a field-circuit coupled model considering DDPMG and the characteristics of external circuit was built up. By this model, the DDPMG no-load, with-load and fault operation conditions could be studied. A 1. 5 MW DDPMG as an example, using field-circuit coupled time-stepping FEM, half-unit motor model was established. The no-load, with-load power angle performance and the magnet demagnetization characteristics due to suddenly short-circuit had been calculated. By comparing of the simulation and measurement curves, it could be found that they matched well. This demonstrated that the time-stepping finite element analysis model had good accuracy and it could be used to estimate the DDPMG performance accurately.

关 键 词：直驱式永磁风力发电机 时步有限元 性能计算 运行特性 

分 类 号：TM315[电气工程—电机] TM301.4