直驱永磁风力发电机的瞬态电磁场计算

The Transient Electromagnetic Field Calculation of Permanent Magnet Generator Directly Driven by Wind Turbine

在进行直驱永磁风力发电机设计时,磁路计算无法得到电机的准确运行参数和运行特性。为了求解电磁参数和性能曲线,本文在阐述了瞬态场计算原理的基础上,对兆瓦级直驱永磁风力发电机进行了不同工作状态的场路结合计算,得到了电机在空载、独立负载和直接并网状态下的电磁场分布情况。计算结果表明电机电磁性能满足额定要求,不同负载下端电压可调节,可在一定范围内过载运行。本文论述的计算方法和计算流程对于研究永磁风力发电机具有较高的工程应用价值。

In the process of designing permanent magnet generator directly driven by wind turbine, the accurate running parameters and performance can not be obtained by calculating the magnetic circuit of the generator. In order to solve electromagnetic parameters and performance curves, different running conditions of megawatt permanent magnet generator directly driven by wind turbine are analyzed and calculated by field-circuit method on the basis of demonstrating the principle of transient electromagnetic calculation in this paper. The electromagnetic distributions under no-load, independent load and direct gird-connected are obtained. The calculation results show that the electromagnetic performance of the generator meets the rated requirement, the terminal voltage can be regulated under different loads and the generator may run in the certain overload range. The presented calculation method and procedure in the paper have a great engineering application value for researching permanent magnet generator by wind turbine.