Effect of the Addition of Isomeric Non-naphthenic Components on the Physicochemical and Electrical Properties of Naphthenic Transformer Oils

被引：0
|
作者：
Zhou Y. [1 ]
Liu J. [2 ]
Wang J. [3 ]
Huang X. [2 ]
Bai S. [3 ]
Chen J. [2 ]
机构：
[1] The Wind Solar Storage Division of State Key Laboratory of Control and Simulation of Power System and Generation Equipment, School of Electrical Engineering, Xinjiang University, Urumqi
[2] State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing
[3] China Electric Power Research Institute, Beijing
来源：
Gaodianya Jishu/High Voltage Engineering | 2022年 / 48卷 / 12期
关键词：
isomeric non-naphthenic; low-temperature kinematic viscosity; naphthenic; pour point; thermal aging;
D O I：
10.13336/j.1003-6520.hve.20211987
中图分类号：
学科分类号：
摘要：
The high-quality transformer oil obtained by further refining of naphthenic crude oil has good electrical properties, lower pour point, and lower kinematic viscosity, and is currently the main oil used in transformers. However, it requires several times scarce naphthenic crude oil resources than common power transformer oils. The gas-to-liquid (GTL) transformer oil has excellent physicochemical and electrical properties, however, it is economically expensive to use. In this paper, GTL oil is added as an isomeric non-naphthenic component to 25 and 45 transformer oil commonly used in power transformers, and its composition is adjusted to study the effects of the isomeric non-naphthenic component on the physicochemical and electrical properties, compared with KI50X transformer oil used in transformers. A new idea to improve the performance and economy of the oil is proposed, which is different from “by further refining of the naphthenic crude oil” to improve the utilization rate of naphthenic crude oil. After adding isomeric non-naphthenic components to 25 and 45 naphthenic oils, the two solidification mechanisms affect each other and the intramolecular friction is reduced. The experimental results show that compared with 25 and 45 oil before mixing, the mixed oil has decreased in pour point and low-temperature kinematic viscosity, decreased density, breakdown voltage value, and frequency dielectric loss factor are comparable to those before mixing, and volume resistivity and thermal aging resistance have increased. By adding 10% of GTL oil to 45 oil, it is possible to produce transformer oil with a very low pour point. After mixing 30% in 25 oil and 33% in 45 oil with isomeric non-naphthenic components, the two blends reach the same level as KI50X in terms of pour point, low-temperature kinematic viscosity, and electrical properties studied, respectively. © 2022 Science Press. All rights reserved.
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页码：4679 / 4687
页数：8
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