[1]任想,刘洋,艾良斌,等.含气泡缺陷环氧浇注绝缘管型母线电击穿机理研究[J].高压电器,2019,55(04):141-148.[doi:10.13296/j.1001-1609.hva.2019.04.020]
 REN Xiang,LIU Yang,AI Liangbin,et al.Investigation of Electrical Breakdown Mechanism of Epoxy Cast Insulated Tubular Bus with Bubble Defects[J].High Voltage Apparatus,2019,55(04):141-148.[doi:10.13296/j.1001-1609.hva.2019.04.020]
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含气泡缺陷环氧浇注绝缘管型母线电击穿机理研究()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第55卷
期数:
2019年04期
页码:
141-148
栏目:
研究与分析
出版日期:
2019-04-15

文章信息/Info

Title:
Investigation of Electrical Breakdown Mechanism of Epoxy Cast Insulated Tubular Bus with Bubble Defects
文章编号:
0141-0148
作者:
任想1 刘洋2 艾良斌3 张闯3 于钦学3 朱思瑞1 金海云3
1. 国网湖北省电力公司电力科学研究院,武汉430077;2. 中国电力科学研究院有限公司,北京100192; 3. 西安交通大学电力设备电气绝缘国家重点实验室,西安710049)
Author(s):
REN Xiang1LIU Yang2AI Liangbin3ZHANG Chuang3YU Qinxue3ZHU Sirui1JIN Haiyun3
1. Electric Power Research Institute,State Grid Hubei Power Grid Co.,Ltd.,Wuhan 430077,China;2. China Electric Power Research Institute,Beijing 100192,China;3. State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University,Xi’an 710049,China
关键词:
环氧浇注绝缘管型母线气泡缺陷击穿机理断裂韧性局部放电
Keywords:
epoxy cast insulated tubular busbubble defectsbreakdown mechanismfracture toughnesspartial discharge
DOI:
10.13296/j.1001-1609.hva.2019.04.020
摘要:
绝缘管型母线是一种新型的母线产品,有着优异的性能。但应用时间较短,研究不够深入,致使故障 频发。文中设计与制备了含气泡缺陷环氧浇注绝缘管型母线真型样品,通过加压电破坏试验,研究其电击 穿机理。在试验中首次发现了气体膨胀鼓包导致最终击穿的破坏方式。研究结果表明,电—机械击穿应为 其击穿模式,其击穿过程可分为气体增强阶段和击穿临界阶段两个阶段,并得到了阶段特征与阶段变化判 据。气隙内由局部放电导致环氧树脂分解所产生的气体气压超过气隙壁断裂韧性临界值,造成裂纹失稳扩 展是击穿的主要原因。可以通过提高环氧树脂材料的抗局部放电能力或对环氧树脂进行改性提高其断裂 韧性来增强绝缘管型母线的击穿性能;传统的检测手段难以判断击穿通道的发展状况。研究结果对于其他 树脂浇注类绝缘电气设备也具有一定的参考价值。
Abstract:
Insulated tubular bus is a novel type of bus product with excellent performance. However,the period of its application is less two decades and its research is insufficient,which resulting in many accidents. In this paper,the full?scale model of epoxy cast insulated tubular bus was designed and fabricated,and its electrical breakdown mech? anism was investigated by withstand voltage test. In the experiment,the failure mode of breakdown caused by gas ex? pansion was found for the first time. The research showed that electrical?mechanical breakdown should be its break? down mode,and the breakdown process could be divided into two stages: gas increase stage and breakdown thresh? old stage. The research also obtained the characteristics and the change criteria of the two stages. The gas in the bub? ble defects generated from epoxy decomposition which caused by partial discharge. When the gas pressure exceeds the critical fracture toughness of the bubble defects wall,the unstable crack extension occurs,therefore,improving the ability about resistance to partial discharge of epoxy resin or improving the fracture toughness of epoxy resin by modifying would enhance the breakdown performance of insulated tubular bus. The result also showed that it was dif? ficult to judge the development status of breakdown channel by traditional testing method. The results of this research also have reference value for other epoxy cast insulated electrical equipment.

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备注/Memo

备注/Memo:
收稿日期:2018?10?08; 修回日期:2018?12?20 基金项目:国家电网公司2016年科技指南项目(52153216000S)。 Project Supported by Science and Technology Guide Project of SGCC(52153216000S). 任想(1990—),男,工程师,博士,从事高电压试验技 术、高电压绝缘、冲击电压量值溯源等方面的研究。 金海云(1990—),男,博士,教授,博导,主要从事电气功 能材料的应用及其特性的研究。
更新日期/Last Update: 2019-04-16