油绝缘典型电极放电产气特性对比分析

doi:10.11930/j.issn.1004-9649.202106003

中国电力 ›› 2021, Vol. 54 ›› Issue (12): 186-194.DOI: 10.11930/j.issn.1004-9649.202106003

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油绝缘典型电极放电产气特性对比分析

刘琴, 谢雄杰, 胡伟, 刘泰蔚, 罗晓庆, 叶奇明

中国电力科学研究院有限公司电网环境保护国家重点实验室, 湖北武汉 430074

收稿日期:2021-06-14 修回日期:2021-08-27 出版日期:2021-12-05 发布日期:2021-12-16
作者简介:刘琴(1985-),女,通信作者,高级工程师,从事输电线路防污闪技术、电晕损失研究,E-mail:liuqin2@epri.sgcc.com.cn
基金资助:
国家电网有限公司科技项目（典型故障下油纸绝缘套管油状态关键参量变化特性及监测方法研究，GY71-20-045）

Comparative Analysis on Discharge Gas Production Characteristics of Typical Electrodes with Oil Insulation

LIU Qin, XIE Xiongjie, HU Wei, LIU Taiwei, LUO Xiaoqing, YE Qiming

China Electric Power Research Institute, State Key Laboratory of Power Grid Environmental Protection, Wuhan 430074, China

Received:2021-06-14 Revised:2021-08-27 Online:2021-12-05 Published:2021-12-16
Supported by:
This work is supported by Science and Technology Project of SGCC (Study on Variation Characteristics and Monitoring Methods of Key Parameters of Oil State of Oil Paper Insulated Casing under Typical Faults, No.GY71-20-045)

摘要/Abstract

摘要： 少油类设备内部通过填充绝缘油进行内部绝缘，因内部空间小，在发生放电或过热故障时，会引起绝缘油关键参量劣化而产生大量H₂、烃类气体、CO和CO₂等油中溶解气体，故障严重时会导致设备爆炸，损失巨大。设计了一种少油类设备放电试验系统，获得了放电后油中气体扩散特性，开展了典型缺陷所对应的3种典型电极（板板电极、球球电极（球纯油球、球纸板球）和针板电极）在不同间隙距离、不同放电时间下的产气量对比研究，研究结果表明：板板电极放电下，直接加压至击穿产气量较小，球球电极和针板电极放电产生的C₂H₂和H₂呈现饱和趋势，在相同的间隙距离和放电时间下，针板电极产气量最大，球球电极次之，产气量最小的是板板电极，在1 mm间隙下，球纯油球较球纸板球布置下的电极放电过程剧烈，产气量大。获得了3种典型电极油中放电气体含量变化规律，主要结论对于少油类设备产气下的故障分析具有重要的意义。

关键词: 电极, 油中放电, 产气特性, H₂, 烃类气体

Abstract: The oil-less equipment is internally insulated by filling with insulating oil. The discharge or overheating faults may cause the degradation of insulating oil, consequently producing a large amount of dissolved gases such as H₂, hydrocarbon gas, CO and CO₂, and equipment explosion may occur in severe cases due to the small internal space, resulting in huge economical loss. Therefore, a discharge test system is designed for oil-less equipment to obtain the gas diffusion characteristics in the oil after discharge. A comparative study is conducted on the gas production for three typical electrodes, including the plate-plate electrode, ball-ball electrode and needle-plate electrode, with different gap distances and different discharge time. The research results show that under plate-plate electrode discharge, the gas produced by direct pressurization to breakdown is small in volume; the content of C₂H₂ and H₂ produced by the ball-ball electrode and needle-plate electrode discharge tends to be saturated; under same gap distance and discharge time, the needle-plate electrode produces the largest volume of gas, followed by the ball-ball electrode, and the plate-plate electrode produces the least; at 1mm gap, the discharge process of ball pure oil ball is more intense than that of ball paperboard ball with large gas production. The variation characteristics of the discharge gas content in three typical electrode oils are thus obtained. The reached conclusions have great significance for the fault analysis of oil-less equipment under gas production.

Key words: electrode, discharge in oil, gas production characteristics, H₂, hydrocarbon gas

刘琴, 谢雄杰, 胡伟, 刘泰蔚, 罗晓庆, 叶奇明. 油绝缘典型电极放电产气特性对比分析[J]. 中国电力, 2021, 54(12): 186-194.

LIU Qin, XIE Xiongjie, HU Wei, LIU Taiwei, LUO Xiaoqing, YE Qiming. Comparative Analysis on Discharge Gas Production Characteristics of Typical Electrodes with Oil Insulation[J]. Electric Power, 2021, 54(12): 186-194.

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油绝缘典型电极放电产气特性对比分析

Comparative Analysis on Discharge Gas Production Characteristics of Typical Electrodes with Oil Insulation

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Comparative Analysis on Discharge Gas Production Characteristics of Typical Electrodes with Oil Insulation

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