首页|A New Method for the Aging Evaluation of Oil-paper Insulation Using n-Butanol and Methanol

A New Method for the Aging Evaluation of Oil-paper Insulation Using n-Butanol and Methanol

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  • 国家科技期刊平台
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To improve the accuracy and efficiency of the aging life prediction and assessment of transformer oil-paper insulation,and to make up for the deficiencies of traditional characterizers,such as 2-furfural,carbon monoxide,and carbon dioxide,a method for the simultaneous determination of methanol,ethanol,n-propanol,and n-butanol in oil with a single injection is estab-lished by headspace-gas chromatography-mass spectrometry.The measured results show that the determination limits of the four alcohol characterizers can be controlled to 10 μg/kg level.Based on this method,the change patterns of the above four alcohols with thermal aging time and degree of polymerization are ob-tained through thermal aging experimental research.Ethanol,n-propanol,and n-butanol in oil indicate nearly linear correlations with thermal aging time and degree of polymerization,similar to that of methanol.By analyzing 52 sets of measured data of 500 kV EHV transformers in operation,n-butanol is found to have excellent performance,and a new method to evaluate the aging state of oil-paper insulation employing n-butanol and methanol is proposed along with the aging attention value model.The measured data of 500 kV EHV transformers in operation indicate that the combination of n-butanol and methanol as the preferred characterizers can effectively compensate for the shortcoming of traditional characterizers in the early stages of aging,and the feasibility of the method is verified.Two possible pathways for the generation of n-butanol by cellulose cleavage during the aging of oil-paper are proposed from the chemical structure of cellulose.

Aging characterizationdetermination methodmethanoln-butanoloil-paper insulation500 kV transformers

Jianyi Wang、Yuanxiang Zhou、Jun Liu、Zhaowei Wang、Song Bai、Jiayu Lu

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Department of High Voltage, China Electric Power Research Institute, Beijing 100192,China

State Key Laboratory of Power Grid Environmental Protection,Beijing 100192,China

Electrical Engineering Department,Tsinghua University,Beijing 100084,China

wind Solar Storage Division of State Key Lab of Power System and Generation Equipment,School of Electrical Engineering,Xinjiang University,Urumqi 830047,China

State Grid Wuwei Electric Power Supply Company,Wuwei 733000,China

Department of High Voltage,China Electric Power Research Institute,Beijing 100192,China

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Innovation Foundation of China Electric Power Research Institute

GY83-18-006

2024

10.17775/CSEEJPES.2021.09210

中国电机工程学会电力与能源系统学报(英文版)
中国电机工程学会

中国电机工程学会电力与能源系统学报(英文版)

CSTPCDEI
ISSN：2096-0042
年,卷(期)：2024.10(2)
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