Influence on Formation of Methanol and Ethanol in Oil-Filled Transformers Under Accelerated Thermal Aging

被引：0
|
作者：
Homeier, K. [1 ]
Imani, M. [1 ]
Muenster, T. [1 ]
Kinkeldey, T. [1 ]
Werle, P. [1 ]
Philipp, D. [2 ]
机构：
[1] Leibniz Univ Hannover, Inst Elect Power Syst, Schering Inst, Div High Voltage Engn & Asset Management, Hannover, Germany
[2] Analysen Serv GmbH, Environm & Oil Lab, Leipzig, Germany
来源：
PROCEEDINGS OF THE 21ST INTERNATIONAL SYMPOSIUM ON HIGH VOLTAGE ENGINEERING, VOL 1 | 2020年 / 598卷
关键词：
Methanol; Ethanol; Thermal aging; Cellulose deterioration; DP value; PART; 2; PAPER; DEGRADATION;
D O I：
10.1007/978-3-030-31676-1_90
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This contribution investigates the suitability of short-chain alcohols for estimating the condition of a cellulose insulation in power transformers. To model an accelerated thermal aging of a transformer, strips of insulation paper impregnated with different insulation liquids were kept in a glass vessel, filled with the dielectric liquid and catalyzer inclusions, in a heating chamber. After oil sampling at predefined intervals, the concentrations of furanic compounds, the degree of polymerization (DP) value and the concentrations of methanol and ethanol in the insulation liquid were measured. Three different types of insulation liquids were utilized, such as the well-known uninhibited and inhibited mineral oil as well as a new inhibited insulation liquid with different oil components, inhibitor content and manufacturing process. These insulation liquids were investigated to obtain their various aging behavior regarding the generation of 2FAL and short-chain alcohols by thermal accelerated stress.
引用
收藏
页码：958 / 968
页数：11
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