电工技术学报  2022, Vol. 37 Issue (3): 767-774    DOI: 10.19595/j.cnki.1000-6753.tces.210127
高电压与放电 |
直流和极性反转电压下石蜡基与环烷基变压器油纸界面电荷积聚特性及动态过程
张书琦1, 赵晓林2, 齐波1, 刘鑫3, 李成榕1
1.新能源电力系统国家重点实验室(华北电力大学) 北京 102206;
2.中国电力科学研究院有限公司 北京 100192;
3.国网安徽省电力有限公司超高压分公司 合肥 230000
Interface Charge Accumulation Characteristics and Dynamic Process of Paraffine-Base and Naphthene-Base Transformer Oils under DC and Polarity Reversal Voltage
Zhang Shuqi1, Zhao Xiaolin2, Qi Bo1, Liu Xin3, Li Chengrong1
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China;
2. China Electric Power Research Institute Beijing 100192 China;
3. State Grid Anhui Ultra High Voltage Company Hefei 230000 China
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摘要 以环烷基变压器油(N油)和石蜡基变压器油(P油)为研究对象,实测得到直流和极性反转电压下油纸绝缘空间电场和界面电荷动态过程。结果表明:恒定直流电压下,P油和N油纸界面电荷积聚速率和量值存在明显差别,P油油纸界面电荷积聚量为N油的0.86倍,电荷积聚速率小于N油的30%;极性反转电压下,极性反转时间对这两种油纸界面电荷动态特性影响较大,当极性反转时间1s时第一次极性反转后电场强度P油为N油的0.54倍,而当极性反转时间120s时P油为N油的1.65倍。从不同于理化特性、电气参数等传统性能指标的角度揭示了石蜡基油和环烷基油对油纸绝缘空间电场时空分布的影响机制,即不同品类变压器油中载流子迁移特性不同,导致油纸界面电荷分布形态出现不同规律。该文研究成果可为换流变压器设计时合理选用变压器油、校核优化绝缘结构提供新的思路方法和指导依据。
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关键词 石蜡基环烷基变压器油电场电荷直流极性反转    
Abstract:Regarding naphthene-base transformer oil (N oil) and hydroisomerized paraffine-base transformer oil (P oil) as the research objects, the dynamic process of space electric field and interface charge of oil-pressboard insulation under DC voltage and polarity reversal (PR) voltage was obtained. Under constant DC voltage, the amount of charge accumulation at the interface of P oil-pressboard was 86% of that of N oil, and the rate of charge accumulation was less than 30% of that of N oil. Under the PR voltage, polarity reversal time had a great influence. While the polarity reversal time was 1s, the electric field of P oil was 0.54 times that of N oil after the first reversal, and while the polarity reversal time was 120 s, the electric field of P oil was 1.65 times that of N oil. The influence of oil character on the converter transformer insulation is revealed from the point of view different from the conventional performance indexes such as physical, chemical and electrical characteristics. It is that different types of transformer oil have different mobility of positive and negative ions, resulting in different distribution patterns at the oil-pressboard interface. It provides a new method and guidance for selecting transformer oil reasonably and optimizing insulation design of converter transformer.
Key wordsParaffine-base    naphthene-base    transformer oil    electric field    charge    DC    polarity reversal   
收稿日期: 2021-01-22     
PACS: TM85  
基金资助:国家自然科学基金联合基金(U1866603)和国网安徽省电力有限公司重点科技项目(52120320006W)资助
通讯作者: 赵晓林 男,1988年生,高级工程师,研究方向为变压器油纸绝缘技术。E-mail:zhaoxiaolin@epri.sgcc.com.cn   
作者简介: 张书琦 男,1981年生,博士研究生,研究方向为变压器设备研制、运维及新技术研发。E-mail:sqzhang@epri.sgcc.com.cn
引用本文:   
张书琦, 赵晓林, 齐波, 刘鑫, 李成榕. 直流和极性反转电压下石蜡基与环烷基变压器油纸界面电荷积聚特性及动态过程[J]. 电工技术学报, 2022, 37(3): 767-774. Zhang Shuqi, Zhao Xiaolin, Qi Bo, Liu Xin, Li Chengrong. Interface Charge Accumulation Characteristics and Dynamic Process of Paraffine-Base and Naphthene-Base Transformer Oils under DC and Polarity Reversal Voltage. Transactions of China Electrotechnical Society, 2022, 37(3): 767-774.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.210127          https://dgjsxb.ces-transaction.com/CN/Y2022/V37/I3/767