植物绝缘油与矿物绝缘油配比对油纸绝缘热老化的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI:10.1109/CEIDP.2013.6748274

Baimei Wang, Jian Li, Junru Xiang, B. Du

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引用次数: 3

摘要

植物绝缘油具有电气性能好、抗老化能力高、环保等特点。因此，它被认为是一种很有前途的矿物绝缘油的替代品。为了使植物油在大型电力变压器中的广泛应用，本文进行了以绝缘纸和混合油为对象的油纸绝缘加速老化试验。混合油由不同比例的植物和矿物绝缘油混合而成。实验在130℃下进行，分析了不同类型油纸绝缘试样老化产物的产生原理。实验结果表明，在老化过程中，绝缘油和纸的含水率随老化时间的延长以及植物绝缘油和矿物绝缘油比例的不同而增加。保温油的酸值随老化时间的延长而增大，酸值与植物和矿物保温油的不同配比有关。随着老化时间的延长，绝缘纸的聚合度(DP)降低。但随着植物绝缘油和矿物绝缘油配比的增加，其DP下降速率有所下降。

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Influence of proportion of vegetable insulating oil and mineral insulating oil on thermal aging of oil-paper insulation

Vegetable insulating oil shows good performance in electric, high anti-aging ability and environmental protection. Thus it is considered as a promising substitute for mineral insulating oil. In order to the wide spread application of vegetable oil in large power transformers, this paper presents accelerated aging experiments of oil-paper insulation involving insulating paper and the mixed oil. The mixed oil combined with different proportion of vegetable and mineral insulating oil. The experiments were performed at 130 °C to analyze the generation principle of aging products for different types of oil-paper insulation samples. Experimental results showed that the moisture content of insulating oil and paper increased with increasing of aging time and the different proportion of vegetable and mineral insulating oil during the aging process. Besides, acid value of insulation oil increased with aging time, and acid value was related to the different proportion of vegetable and mineral insulating oil. The degree of polymerization (DP) of the insulation paper decreased with the aging time. However, the DP declining rate decreased with increasing of different proportion of vegetable and mineral insulating oil.

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来源期刊

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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