NTPC Transactions on Energy Research
S.Shaswattam, Anil Kumar Das, Subrata Sarkar, Prahlad Halder
A Comparative Electrical and Physicochemical Parameter Study for Fault Analysis and Health Assessment of Transformers through Insulating Oil
- DOI
- 10.2991/978-94-6463-849-3_8How to use a DOI?
- Keywords
- Power plant transformer; Insulating oil; Aging; Dissolved gas analysis
- Abstract
Power plant transformer health evaluation plays a significant role for efficiency and continuous performance in electric power generation and transmission. When a power transformer is in service, it faces numerous stresses such as electrical stress, thermal stress etc. leading to the release of various C1-C3 hydrocarbon gases (i.e., methane, ethane, acetylene, ethylene, etc.) from the transformer oil and other gases such as CO2, CO, hydrogen from paper insulation etc. along with various electrical & physicochemical properties such as specific resistivity, Tan Delta, and breakdown voltage (BDV), among others, are altered. In this context, health assessment and continuous monitoring of transformers and failure analysis are crucial to the reliability of a thermal power plant. In this work, we have considered 10 different transformers and comparatively studied these transformers via dissolved gas analysis and various electrical & physicochemical parameters via transformer oil analysis to interpret types of failure and monitor health of a transformer. From this study it has been found that OS6 sample shows the highest amount of hydrogen (2267 PPM) which suggests partial discharge taking place in the transformer. On the other hand, OS2 and OS6 samples show a high amount of acetylene which indicates arcing occurring in the transformer. BDV of OS6 is also less in compared to recommended value. This may be due to the high amount of moisture present in the sample.
- Copyright
- © 2025 The Author(s)
- Open Access
- Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits any noncommercial use, sharing, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if you modified the licensed material. You do not have permission under this license to share adapted material derived from this chapter or parts of it.
Cite this article
TY - CHAP AU - Sujit Kumar Guchhait AU - Shyam Khatana AU - Rajendra Kumar Saini AU - Anil Kumar Das ED - S.Shaswattam ED - Anil Kumar Das ED - Subrata Sarkar ED - Prahlad Halder PY - 2025 DA - 2025/10/01 TI - A Comparative Electrical and Physicochemical Parameter Study for Fault Analysis and Health Assessment of Transformers through Insulating Oil BT - NTPC Transactions on Energy Research PB - Springer nature singapore SP - 93 EP - 104 CY - singapore SN - 978-94-6463-849-3 UR - https://doi.org/10.2991/978-94-6463-849-3_8 DO - 10.2991/978-94-6463-849-3_8 ID - Guchhait2025 ER -