Dielectric Spectroscopy of Aqueous Insulating Oil Based on Maxwell-Wagner Modified Model

IF 2.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-08-22 DOI:10.1109/TDEI.2024.3448396

Jiangbo Qian;Zhilin Zhang;Cheng Peng;Liwei Shao;Gengda Li

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引用次数: 0

Abstract

The dielectric characteristics of aqueous insulating oil has an important impact on the safe operation of transformers. In this article, the integration method is used to modify the Maxwell-Wanger nonuniform dielectric model to make it suitable for aqueous insulating oil, and the reliability of the new model is verified. The experimental results show that when the water content is 20 ppm, the maximum error of the real part of the complex dielectric constant of the insulating oil does not exceed 0.0541%, and the maximum error of the imaginary part does not exceed 1.076%. Finally, based on this model, the dielectric spectrum of the aqueous insulating oil is obtained, the variation law of the real part and the imaginary part of the aqueous insulating oil under different conditions is revealed, and the internal reasons for the dielectric properties of the aqueous insulating oil with temperature, frequency, and moisture content are analyzed, which provides an important reference data for evaluation and online monitoring of insulation performance of the aqueous insulating oil.

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基于 Maxwell-Wagner 修正模型的含水绝缘油介电光谱学

水绝缘油的介电特性对变压器的安全运行有重要影响。本文采用积分法对 Maxwell-Wanger 非均匀介电模型进行了修正，使其适用于水性绝缘油，并验证了新模型的可靠性。实验结果表明，当含水量为 20 ppm 时，绝缘油复介电常数实部的最大误差不超过 0.0541%，虚部的最大误差不超过 1.076%。最后，基于该模型得到了水基绝缘油的介电频谱，揭示了不同条件下水基绝缘油实部和虚部的变化规律，分析了水基绝缘油介电性能随温度、频率和含水量变化的内在原因，为水基绝缘油绝缘性能的评估和在线监测提供了重要的参考数据。

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

IEEE Transactions on Dielectrics and Electrical Insulation 工程技术-工程：电子与电气

CiteScore

6.00

自引率

22.60%

发文量

309

审稿时长

5.2 months

期刊介绍： Topics that are concerned with dielectric phenomena and measurements, with development and characterization of gaseous, vacuum, liquid and solid electrical insulating materials and systems; and with utilization of these materials in circuits and systems under condition of use.