Numerical modeling of HTS excited medium-speed wind generators with diode rectifier stator feeding

IF 1.6 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC International Journal of Numerical Modelling-Electronic Networks Devices and Fields Pub Date : 2024-08-26 DOI:10.1002/jnm.3284

Robin Köster, Andreas Binder

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Abstract

Medium-speed wind generators in the MW-range with high-temperature superconducting excitation winding are analyzed by means of non-linear 2D and 3D FEM models. Besides an inverter-based sinusoidal stator current feeding, a grid connection via a diode rectifier is analyzed by using coupled FEM and circuit simulations. The newly proposed modeling techniques are used to determine the excitation requirement for speed-variable, unity power factor operation at constant stator voltage, as required for a diode rectifier feeding of the stator winding. 2D FEM models in the H-A-formulation are developed and used for the calculation of the hysteresis loss in the superconducting field winding at stationary operation as well as for an investigation of field current variations in the HTS field winding. The major modeling challenges consist in very long settling times of voltage-fed models, several strong model non-linearities and high requirements on the spatial discretization. Approaches for overcoming these difficulties with reasonable computational efficiency are proposed.

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二极管整流器定子馈电 HTS 激励中速风力发电机的数值建模

通过非线性二维和三维有限元模型分析了采用高温超导励磁绕组的兆瓦级中速风力发电机。除了基于逆变器的正弦定子电流馈电外，还利用耦合有限元和电路仿真分析了通过二极管整流器的电网连接。新提出的建模技术用于确定定子电压恒定时的变速、统一功率因数运行的励磁要求，这也是二极管整流器馈入定子绕组的要求。开发了 H-A 公式的二维有限元模型，用于计算静态运行时超导磁场绕组中的磁滞损耗，以及研究 HTS 磁场绕组中的磁场电流变化。建模面临的主要挑战包括：电压馈电模型的沉淀时间非常长、模型存在若干强烈的非线性以及对空间离散性的高要求。本文提出了以合理的计算效率克服这些困难的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Numerical Modelling-Electronic Networks Devices and Fields 工程技术-工程：电子与电气

CiteScore

4.60

自引率

6.20%

发文量

101

审稿时长

>12 weeks

期刊介绍： Prediction through modelling forms the basis of engineering design. The computational power at the fingertips of the professional engineer is increasing enormously and techniques for computer simulation are changing rapidly. Engineers need models which relate to their design area and which are adaptable to new design concepts. They also need efficient and friendly ways of presenting, viewing and transmitting the data associated with their models. The International Journal of Numerical Modelling: Electronic Networks, Devices and Fields provides a communication vehicle for numerical modelling methods and data preparation methods associated with electrical and electronic circuits and fields. It concentrates on numerical modelling rather than abstract numerical mathematics. Contributions on numerical modelling will cover the entire subject of electrical and electronic engineering. They will range from electrical distribution networks to integrated circuits on VLSI design, and from static electric and magnetic fields through microwaves to optical design. They will also include the use of electrical networks as a modelling medium.