Influence of Voltage Frequency and Filler Content on Breakdown Characteristics of Epoxy Resin

2023 IEEE 6th International Electrical and Energy Conference (CIEEC) Pub Date : 2023-05-12 DOI:10.1109/CIEEC58067.2023.10166474

Haowei Xu, Qinhao Bu, Xingyu Shang, Qiaogen Zhang

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Abstract

Epoxy resins have great potential for insulation of power electronic transformers due to their high dielectric properties and strong corrosion resistance. In the long-term operation of power equipment, epoxy resin will undergo insulation aging, and electrical treeing is the main way of its insulation aging, and electrical trees will gradually develop to complete breakdown. In practice, epoxy resins with fillers are often used as insulating materials. In order to study the breakdown characteristics of epoxy resin/Al2O3 composites, a experimental platform for measuring the breakdown voltage of epoxy resin composites was established in this paper, and the effects of frequency and filler content on the breakdown properties of epoxy resin/ Al2O3 composites under 50-2000Hz AC voltage were investigated. The results show that with the increase of frequency, the breakdown voltage decreases gradually, and the breakdown voltage has a threshold value; the breakdown voltage of composites shows a trend of first increasing and then decreasing with the increase of filler content.

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电压频率和填料含量对环氧树脂击穿特性的影响

环氧树脂具有较高的介电性能和较强的耐腐蚀性，在电力电子变压器绝缘中具有很大的应用潜力。在电力设备的长期运行中，环氧树脂会发生绝缘老化，电工树是其绝缘老化的主要方式，电工树将逐步发展到完全击穿。在实际应用中，带填料的环氧树脂常被用作绝缘材料。为了研究环氧树脂/Al2O3复合材料的击穿特性，本文建立了测量环氧树脂复合材料击穿电压的实验平台，研究了频率和填料含量对环氧树脂/Al2O3复合材料在50-2000Hz交流电压下击穿性能的影响。结果表明:随着频率的增加，击穿电压逐渐降低，击穿电压存在一个阈值;随着填料含量的增加，复合材料的击穿电压呈现先升高后降低的趋势。

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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2023 IEEE 6th International Electrical and Energy Conference (CIEEC)

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