| 报告题名: | Transformer Windings Ageing, diagnosis and asset management. Version 4 |
| 作者: | Lundgaard, Lars Esben; Liland, Knut Brede; Linhjell, Dag; Susa, Dejan; Ese, Marit-Helen; Selsbak, Cecilie Mørk; Kes, M; Lesaint, Cedric Michel
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| 出版年: | 2015
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| 发表日期: | 2015
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| 国家: | 挪威
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| 语种: | 英语
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| 中文主题词: | 氮
; 污染物
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| 主题词: | NITROGEN
; CONTAMINANTS
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| 英文摘要: | This report addresses state of the art in the field of transformer ageing and diagnostics, with emphasis on advising end-users on transformer asset management and on transformer specification. The basis is results from two projects on laboratory studies on ageing of mineral oil impregnated cellulose insulation, and also some studies on service aged transformers.
Ageing is governed by thermally activated processes and accelerated from presence of contaminants like water, lighter carboxylic acids and oxygen. It is found that commercially available thermally upgraded papers used for limiting ageing rates may vary a lot in quality, mainly due to varying nitrogen content.
Two schemes for assessing the present and future ageing condition are possible:
- Monitoring by-products formed during ageing, using these as ageing indicators. The recommended indicators are furanes, methanol, water soluble acids, water and CO and CO2
- Calculation based on ageing kinetic algorithms using thermal conditions, contamination and materials used as input parameters.
Schemes are given for calculation of ageing condition and expected remaining life estimation. Qualified thermal analysis of service history is necessary for carrying out qualified estimations.
Three different rigs for studying the condition of transformers in service have been tested.
An experimental rig has been built to study temperature dependent partitioning of water and other contaminants in order to facilitate condition of cellulose in the windings from oil samples.
Partitioning curves for water, acids and furanes in aged transformer insulation is studied. |
| URL: | https://brage.bibsys.no/xmlui/bitstream/handle/11250/2400352/TR%2bA7099_v4.PDF?sequence=3&isAllowed=y
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/28860
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| TR+A7099_v4.PDF（3069KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Lundgaard, Lars Esben,Liland, Knut Brede,Linhjell, Dag,et al. Transformer Windings Ageing, diagnosis and asset management. Version 4. 2015-01-01.
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