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Home > Archive>Volume 46, Issue 11, 2023 >49-55. DOI:10.11835/j.issn.1000-582X.2023.11.005
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Research on the aging of oil-paper insulation based on continuous return voltage polarization spectrum
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Affiliation:

1.College of Electrical Engineering and Automation，Xiamen University of Technology，Xiamen，Fujian 361024， P. R. China;2.Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control，Xiamen， Fujian 361024， P. R. China;3.Department of Electrical Engineering，Fujian College of Water Conservancy and Electric Power，Yong’an， Fujian 366000， P. R. China

Clc Number:

TM411

Fund Project:

Supported by National Natural Science Foundation of China (51407151)， and Natural Science Foundation of Fujian Province (2020J01281).

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    Abstract:

    To address the issues of inaccuracies in traditional return voltage polarization spectrum, specifically the inaccurate representation of return voltage at various charging times and the challenge in determining the central time constant precisely, this paper proposes a novel drawing method of the continuous return voltage polarization spectrum. Firstly, this paper analyzes the relationship between the return voltage curve and the equivalent circuit parameters of the insulation system. It then builds a continuous return voltage polarization spectrum model, extracting a more accurate central time constant. By linking this central time constant with the micro-water content of the transformer, the paper establishes an effective method for determining the transformer’s micro-water content. Finally, this paper analyzes continuous return voltage polarization spectra using six transformers in different aging states. The results show that this method accurately determines the central time constant, significantly enhancing the accuracy of micro-water content determination in transformers. This approach offers a new method to accurately assess the aging state of transformer oil-paper insulation.

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林智勇,张波,张达敏,苏若杭,林朝明.基于连续型回复电压极化谱的油纸绝缘老化研究[J].重庆大学学报,2023,46(11):49~55

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History
  • Received:March 17,2023
  • Online: November 28,2023
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