Data-Driven-Based Full Recovery Technology and System for Transformer Insulating Oil

Feng Chen, Li Wang, Zhiyao Zheng, Bin Pan, Yujia Hu () and Kexin Zhang ()
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Feng Chen: Materials Branch, State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310015, China
Li Wang: Materials Branch, State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310015, China
Zhiyao Zheng: Zhejiang Huadian Equipment Testing and Research Insitute Co., Ltd., Hangzhou 310015, China
Bin Pan: Materials Branch, State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310015, China
Yujia Hu: Zhejiang Huadian Equipment Testing and Research Insitute Co., Ltd., Hangzhou 310015, China
Kexin Zhang: Huzhou Institute of Zhejiang University, Huzhou 313000, China

Energies, 2024, vol. 17, issue 24, 1-17

Abstract: This study aims to develop an efficient recovery solution for waste transformer insulating oil, addressing the challenge of incomplete separation of residual oil in existing recovery technologies. A multi-module integrated system is constructed, comprising a waste oil extraction module, a residual oil vaporization module, an exhaust gas treatment module, and an online monitoring module. By combining steps such as oil extraction, residual oil absorption, hot air circulation heating, and negative-pressure low-frequency induction heating, the complete recovery of waste oil is achieved. The recovery process incorporates oil–gas saturation monitoring and an oil–gas precipitation assessment algorithm based on neural networks to enable intelligent control, ensuring thorough recovery of residual oil from transformers. The proposed system and methods demonstrate excellent recovery efficiency and environmental protection effects during the pre-treatment of waste transformer oil. Experiments conducted on 50 discarded transformers showed an average recovery efficiency exceeding 99%, with 49 transformers exhibiting no damage to core components after the recovery process. From a theoretical perspective, this research introduces monitoring and control methods for transformer insulating oil recovery, providing significant support for the green processing and reutilization of discarded transformer insulating oil. From an application value perspective, the recovery process helps reduce environmental pollution and facilitates the disassembly of transformers. This enables better analysis of transformer operating characteristics, thereby enhancing the reliability and safety of power systems.

Keywords: transformer insulating oil recovery; data-driven monitoring; thermal cycle of insulating oil; recovery rate (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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