高压群变直流偏置特性解析计算方法研究

IF 3.8 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Botong Li;Siyuan Liu;Weijie Wen;Bin Li;Qing Li
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引用次数: 0

摘要

变压器直流偏置的计算方法和特性分析是研究变压器直流偏置问题的基础。目前主要采用数值计算方法求解变压器的电磁耦合方程,无法得到电流表达式并进行精确的TDB特性分析。本文将磁化曲线的拐点作为计算周期的分界点。对群变压器的电磁耦合方程逐段解析求解,得到了绕组电流和励磁电流在不饱和区和饱和区的时域表达式。分析了TDB对绕组电流和励磁电流特征分量的影响。在此基础上,提出了引起变压器临界饱和的直流偏置电流的计算方法。实现了TDB下岩心是否发生饱和现象的预测。利用Matlab/Simulink仿真平台验证了理论分析的有效性和准确性。本文的结论为定量分析TDB的特点提供了一定的参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Research on Analytical Calculation Method for DC Bias Characteristic of High Voltage Group Transformer
The calculation methods and characteristics analysis of transformer DC bias (TDB) are fundamental to researching the DC bias problems. Presently, the numerical calculation method is mainly adopted to solve the electromagnetic coupling equation of the transformer, which is unable to obtain the current expression and make precise TDB characteristics analysis. In this paper, the knee point of the magnetization curve is taken as the demarcation point of the calculation cycle. The electromagnetic coupling equation of the group transformer is solved analytically segment by segment, and time-domain expressions of winding current and excitation current in the unsaturated area and saturated area are obtained. The influence of TDB on the winding current and excitation current characteristic components is analyzed. On this basis, A calculation method for the DC bias current that causes critical saturation of the transformer is proposed. Furthermore, achieving the prediction of whether the core occurs saturated phenomenon under TDB. The validity and accuracy of the theoretical analysis are verified using the Matlab/Simulink simulation platform. The conclusions of the paper provide certain references for quantitatively analyzing the characteristics of TDB.
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来源期刊
IEEE Transactions on Power Delivery
IEEE Transactions on Power Delivery 工程技术-工程:电子与电气
CiteScore
9.00
自引率
13.60%
发文量
513
审稿时长
6 months
期刊介绍: The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.
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