Analysis of leakage flux, losses, and temperature in large synchronous generator end zone under the multi-layer screen thickness based on novel iterative method

IF 1.4 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Jichao Han, Jiayu Qiu, Mingxuan Teng, Haiming Qi, Baojun Ge
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Abstract

The multi-layer screen is the key component in the large synchronous generator end zone. The leakage flux, losses, and temperature of end components are significantly affected by the thickness of multi-layer screen in the synchronous generator. To investigate the influence of multi-layer screen thickness on the end leakage flux, losses, and temperature in the synchronous generator end zone, 1407MVA nuclear power synchronous generator is studied. Three-dimensional transient electromagnetic field model of synchronous generator end zone is established. Three-dimensional transient electromagnetic field in the end zone of 1407MVA synchronous generator with the multi-layer screen is calculated based on the novel iterative method. The flux density of end components is compared and studied in the end zone under the variation of multi-layer screen thickness. Influence of the different thicknesses of multi-layer screen on the losses of the shield plate, screen, finger plate, and stator end core is researched. The losses of end components obtained from 3D end electromagnetic field calculation are applied to the end zone as the heat source in the three-dimensional fluid and thermal coupled field. The temperature distribution of the end components is determined. The accuracy of the calculated results is validated by the experimental values.

Abstract Image

基于新型迭代法的多层滤网厚度下大型同步发电机端区漏磁通、损耗和温度分析
多层滤网是大型同步发电机端区的关键部件。同步发电机中多层滤网的厚度对端部部件的漏磁通、损耗和温度有很大影响。为了研究多层滤网厚度对同步发电机端区端部泄漏通量、损耗和温度的影响,本文以 1407MVA 核电同步发电机为研究对象。建立了同步发电机端区的三维瞬态电磁场模型。基于新颖的迭代法计算了带有多层滤网的 1407MVA 同步发电机端区的三维瞬态电磁场。比较并研究了多层滤波器厚度变化时端区的端部元件磁通密度。研究了不同厚度的多层滤网对屏蔽板、滤网、指形板和定子端部铁芯损耗的影响。在三维流体和热耦合场中,将三维端部电磁场计算得到的端部部件损耗作为热源应用于端部区域。确定了端部组件的温度分布。实验值验证了计算结果的准确性。
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
Iet Science Measurement & Technology
Iet Science Measurement & Technology 工程技术-工程:电子与电气
CiteScore
4.30
自引率
7.10%
发文量
41
审稿时长
7.5 months
期刊介绍: IET Science, Measurement & Technology publishes papers in science, engineering and technology underpinning electronic and electrical engineering, nanotechnology and medical instrumentation.The emphasis of the journal is on theory, simulation methodologies and measurement techniques. The major themes of the journal are: - electromagnetism including electromagnetic theory, computational electromagnetics and EMC - properties and applications of dielectric, magnetic, magneto-optic, piezoelectric materials down to the nanometre scale - measurement and instrumentation including sensors, actuators, medical instrumentation, fundamentals of measurement including measurement standards, uncertainty, dissemination and calibration Applications are welcome for illustrative purposes but the novelty and originality should focus on the proposed new methods.
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