Influence of the Electromagnetic Field Model on the Calculated No-Load Magnetic Field of Tubular Hydro Generators

IF 1.5 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Iet Electric Power Applications Pub Date : 2025-06-05 DOI:10.1049/elp2.70052

Qi-Rui Yin, Zhi-Ting Zhou, Zhen-Nan Fan, Yong Yang, Jing-Can Li

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Abstract

The selected electromagnetic field model of a hydro generator directly affects the calculation of the no-load magnetic field, which in turn affects the grid-connected power quality of the hydrogenerator and the power transmission safety. Tubular hydro generators have a horizontal structure with less internal space than the conventional vertical hydro generator, which results in a particularly complex and strong internal magnetic field distribution. This study investigated the influence of the selected electromagnetic field model on the calculation of the no-load magnetic field of a tubular hydro generator. Straight and skewed stator slots were considered for the structure of the hydro generator. Three models were considered: the transient motion electromagnetic field-circuit coupling model, the transient motion electromagnetic field model, and the static electromagnetic field model. The calculation accuracy and computational efficiency of the three models were evaluated by comparison to measured data. The results were used to make reasonable suggestions for the selection of a suitable electromagnetic field model in different scenarios. The findings are expected to support the electromagnetic field analysis and design of hydro generators.

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电磁场模型对管式水轮发电机空载磁场计算的影响

水轮发电机电磁场模型的选择直接影响到空载磁场的计算，进而影响到水轮发电机的并网电能质量和输电安全。管式水轮发电机具有水平结构，其内部空间比传统的立式水轮发电机小，这导致其内部磁场分布特别复杂和强烈。研究了所选择的电磁场模型对管式水轮发电机空载磁场计算的影响。考虑了水轮发电机定子槽的直槽和斜槽结构。考虑了三种模型：瞬态运动电磁场-电路耦合模型、瞬态运动电磁场模型和静态电磁场模型。通过与实测数据的对比，评价了三种模型的计算精度和计算效率。研究结果为不同场景下选择合适的电磁场模型提供了合理的建议。研究结果有望为水轮发电机的电磁场分析和设计提供支持。

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来源期刊

Iet Electric Power Applications 工程技术-工程：电子与电气

CiteScore

4.80

自引率

5.90%

发文量

104

审稿时长

3 months

期刊介绍： IET Electric Power Applications publishes papers of a high technical standard with a suitable balance of practice and theory. The scope covers a wide range of applications and apparatus in the power field. In addition to papers focussing on the design and development of electrical equipment, papers relying on analysis are also sought, provided that the arguments are conveyed succinctly and the conclusions are clear. The scope of the journal includes the following: The design and analysis of motors and generators of all sizes Rotating electrical machines Linear machines Actuators Power transformers Railway traction machines and drives Variable speed drives Machines and drives for electrically powered vehicles Industrial and non-industrial applications and processes Current Special Issue. Call for papers: Progress in Electric Machines, Power Converters and their Control for Wave Energy Generation - https://digital-library.theiet.org/files/IET_EPA_CFP_PEMPCCWEG.pdf