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中国电机工程学报 2010, 30(19) 120-126 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 高电压技术 |
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混合绝缘油对油–纸绝缘热老化速率的延缓原因分析 |
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郝建，杨丽君，廖瑞金，李剑，尹建国 |
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输配电装备及系统安全与新技术国家重点实验室(重庆大学) |
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摘要：
为解决变压器现用矿物绝缘油资源短缺和环境污染等问题，在前期研究的基础上，研制了一种矿物油–天然酯混合绝缘油。实验表明该混合油在各项指标上均满足变压器用油的标准，并通过热老化实验初步证实了该混合油具有较矿物绝缘油优良的抗老化性能。为探索该混合油及其浸渍的绝缘纸与普通矿物油–纸绝缘在热老化特性上的差异，对矿物油–纸绝缘和混合油–纸绝缘在110 ℃下开展了264天的加速热老化实验，对比分析了老化过程中2种绝缘油的酸值、颜色和绝缘纸聚合度的变化规律。结果表明，该混合油能有效延缓由其浸渍的绝缘纸的热老化速率。最后在物质分子结构和材料热稳定性层面揭示了混合油–纸绝缘抗老化的机制，为该混合油的下一步研究工作和工程应用奠定了基础。 |
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关键词：
油–纸绝缘
热老化
混合油
分子结构
热稳定性
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Mechanism Investigation on Delaying of the Thermal Aging Rate of Oil-paper Insulation
With Mixture Insulating Oil |
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HAO Jian, YANG Li-jun, LIAO Rui-jin, LI Jian, YIN Jian-guo |
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State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University) |
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Abstract:
To deal with the shortage of mineral insulating oil used for transformers and the related problem of environmental deterioration, a new type of mixture insulating oil composed of mineral oil and natural ester has been developed through a plenty of research work. It was proved that the mixture insulating oil has excellent electrical and physicochemical properties, which meet the standard of transformer insulating oil. The thermal aging experiment indicated that the anti-aging effect of the mixture oil is better than that of the traditional mineral oil. In order to explore the difference in thermal aging characteristics between mixture oil-paper insulation and mineral oil-paper insulation, a 264-day test on thermal aging acceleration was performed under 110 ℃. Comparative analyses were conducted on acid values, colors of the oils, as well as the degree of polymerization of insulation papers. Results showed that the anti-aging property of the mixture oil is superior to the mineral oil. In addition, the mixture oil can effectively delay the thermal aging rate of the impregnated insulation papers; and the mechanism can be explained at the level of molecular structure and thermal stability of materials, so as to provide a theoretical basis and a technical support for further research and engineering application of the mixture oil. |
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Keywords:
oil-paper insulation
thermal aging
mixture oil
molecular structure
thermal stability
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收稿日期 2009-09-04 修回日期 2010-02-01 网络版发布日期 2010-07-12 |
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DOI: |
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基金项目:
国家重点基础研究发展计划项目(973项目)(2009CB724505-1)；国家自然科学基金项目(50677073)；重庆市自然科学基金项目(2008BB6172)。 |
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通讯作者: 郝建 |
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作者简介: |
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作者Email: cquhaojian@126.com |
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| 参考文献： |
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| 本刊中的类似文章 |
| 1．廖瑞金 唐超 杨丽君 孙才新 张昀.电力变压器用绝缘纸热老化的微观结构及形貌研究[J]. 中国电机工程学报, 2007,27(33): 59-64 |
| 2．梁帅伟 廖瑞金 杨丽君 孙会刚 向彬.天然酯与矿物油纸绝缘的加速热老化特性研究[J]. 中国电机工程学报, 2008,28(25): 20-24 |
| 3．杨丽君 廖瑞金 孙会刚 孙才新 李剑.油纸绝缘热老化特性及生成物的对比分析[J]. 中国电机工程学报, 2008,28(22): 53-58 |
| 4．王立乔 齐飞.级联型多电平变流器新型载波相移SPWM研究[J]. 中国电机工程学报, 2010,30(3): 28-34 |
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