A Method to Predict Degree of Polymerization Value of Oil-paper Insulation Using Interfacial Charge

2019 ◽  
Author(s):  
Vijeta Singh ◽  
Deepak Mishra ◽  
Arijit Baral ◽  
Sivaji Chakravorti
Keyword(s):  
Degree Of Polymerization ◽  
Paper Insulation ◽  
Interfacial Charge

scholarly journals THE DEGREE OF POLYMERIZATION OF POWER TRANSFORMERS’ PAPER INSULATION

2019 ◽  
Vol 20 (9-10) ◽  
pp. 34-38 ◽  
Author(s):  
V. K. Kozlov ◽  
A. Kh. Sabitov
Keyword(s):  
Aging Time ◽  
Thermal Aging ◽  
Manufacturing Process ◽  
Degree Of Polymerization ◽  
Power Transformers ◽  
Aging Rate ◽  
Slowing Down ◽  
Starting Time ◽  
Exponential Decrease ◽  
Paper Insulation

The paper presents the results of research and analysis of literature data on the paper insulation's thermal aging. An exponential decrease in the degree of polymerization of paper insulation from the aging time is established, at the starting time of transformers’ operation the aging rate of paper insulation is maximal and after that its slowing down. It was found out that the degree of polymerization at the starting time of the transformer's operation can be in the range of 900 units, this is due to its drying during the manufacturing process.

Lifespan Model of the Relationships between Ethanol Indicator and Degree of Polymerization of Transformer Paper Insulation

2021 ◽  
Vol 28 (6) ◽  
pp. 1859-1866
Author(s):  
Enze Zhang ◽  
Hanbo Zheng ◽  
Yiyi Zhang ◽  
Jiefeng Liu ◽  
Zhen Shi ◽  
...  
Keyword(s):  
Degree Of Polymerization ◽  
Paper Insulation

Use of Interfacial Charge for Diagnosis and Activation Energy Prediction of Oil-Paper Insulation Used in Power Transformer

2019 ◽  
Vol 34 (4) ◽  
pp. 1332-1340 ◽  
Author(s):  
Deepak Mishra ◽  
Saurabh Dutta ◽  
Arijit Baral ◽  
Nasirul Haque ◽  
Sivaji Chakravorti
Keyword(s):  
Activation Energy ◽  
Power Transformer ◽  
Energy Prediction ◽  
Paper Insulation ◽  
Interfacial Charge

scholarly journals Transformer lifetime management by analyzing the content of furan and gas dissolved in oil

2019 ◽  
Vol 112 ◽  
pp. 04004
Author(s):  
Irina Alina Chera Anghel ◽  
Elena Gatman
Keyword(s):  
Carbon Oxide ◽  
Technical Condition ◽  
Degree Of Polymerization ◽  
Gas Analysis ◽  
Insulating Oil ◽  
Invasive Test ◽  
Paper Insulation ◽  
Transformer Insulation ◽  
Cellulose Insulation

In order to see the transformer insulation status, the temperature profile, the degree of polymerization (DP), the furan compound content, the carbon dioxide, and carbon monoxide concentration are monitored. By evaluating the degree of polymerization (DP) of the cellulose paper insulation and furans in the determination of the insulating oil, it can estimate the lifetime of the transformer. Analysis of cellulose insulation paper to see the degree of polymerization (DP) can be performed safely only when the transformer is interrupted. However, being a non-invasive test, determination of furane content in an oil-insulating oil is often used as an alternative method for measuring the DP average of insulation paper. In order to analyze the technical condition of a transformer, furan content in oil should be used and interpreted as a primary chemical indicator in conjunction with the results of carbon oxide from the dissolved gas analysis, the acidity and moisture results from the chemical tests, the methanol content from the chromatographic tests and other monitoring techniques.

Sign in / Sign up

Export Citation Format

Share Document