[1]高博,闫振华,周利军,等.钢脚轻微松动对悬式瓷绝缘子性能的影响研究[J].电瓷避雷器,2019,(04):223-229.[doi:10.16188/j.isa.1003-8337.2019.04.038]
 GAO Bo,YAN Zhenhua,ZHOU Lijun,et al.Study on the Influence of Slight Looseness of Steel Pin on Porcelain Insulator[J].,2019,(04):223-229.[doi:10.16188/j.isa.1003-8337.2019.04.038]
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钢脚轻微松动对悬式瓷绝缘子性能的影响研究()
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《电瓷避雷器》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2019年04期
页码:
223-229
栏目:
绝缘子
出版日期:
2019-08-31

文章信息/Info

Title:
Study on the Influence of Slight Looseness of Steel Pin on Porcelain Insulator
作者:
高博1 闫振华1 周利军2 胡建林3 毕茂强3 荣飞2
(1.国网宁夏电力有限公司 电力科学研究院, 银川 750001; 2.国网宁夏电力有限公司 宁东供电公司, 宁夏 灵武, 750411; 3.重庆大学 输配电装备及系统安全与新技术国家重点实验室, 重庆 400030)
Author(s):
GAO Bo1 YAN Zhenhua1 ZHOU Lijun2 HU Jianlin3 BI Maoqiang3 RONG Fei2
(1.Electric Power Research Institute of Ningxia Power Electric Corporation of State Grid, Yinchuan 750001, China; 2.Ningdong Power Supply Company of Ningxia Power Electric Corporation of State Grid, Lingwu 750411, China; 3.State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400030, China)
关键词:
钢脚松动 绝缘子 机械破坏负荷 工频击穿
Keywords:
looseness of steel pin insulator mechanical failing load AC breakdown voltage
DOI:
10.16188/j.isa.1003-8337.2019.04.038
摘要:
悬式瓷绝缘子在运行输电线路中不但要承受机械应力和电场的作用,同时也要遭受日晒雨淋等环境变化。恶劣的运行环境对绝缘子的质量提出了更高的要求。作者在绝缘子抽检工作中发现:部分抽检悬式瓷绝缘子存在钢脚轻微松动的现象。为进一步探讨这种现象对绝缘子性能的影响,选取了抽检中发现钢脚手感轻微松动和同一批次手感不动的瓷绝缘子,进行机械、电气性能试验以及冻融循环试验。研究表明:钢脚轻微松动的瓷绝缘子机械破坏负荷和工频击穿耐受性能与同批次的其他绝缘子无明显的差异; 由于钢脚轻微松动的绝缘子水泥胶合剂与钢脚之间存在明显的间隙,水分子更容易渗透到该间隙当中,经多次冻融循环以后,水泥胶合剂的力学性能出现明显的下降,导致绝缘子机械破坏负荷显著降低。因此,在昼夜温差和湿度较大的运行环境下,不宜采用存在钢脚松动现象的绝缘子。
Abstract:
Porcelain insulators not only bear the mechanical stress and electric field effect, but also suffer from environmental changes such as sunlight and rain. Because of the harsh operating environment, higher requirements for the quality of the insulator has been put forward. In the sampling inspection, the author found out that some steel pins were slightly loose. In order to investigate the effect of this phenomenon on the performance of insulator, the mechanical and electrical properties tests and freeze-thaw cycle test were carried out on these porcelain insulators with slightly loose steel pins and fixed steel pins. The research shows that no obvious difference of mechanical failing load and puncture property between the insulators whose steel pins were slightly loose and those with fixed steel pins; because there is an obvious gap between the steel pin and cement of the insulator, the water molecules can more easily penetrated into the gap, and after freeze-thaw cycles tests on the insulator, the mechanical property of cement decreased obviously, which leads to the mechanical failing load of insulator decreased significantly. Therefore, it is not suitable to use insulators with loose steel pin in the operating environment with great temperature difference and humidity.

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备注/Memo

备注/Memo:
收稿日期:2017-11-30 作者简介:高博(1984—),男,工程师,主要从事高电压试验技术及输电线路设备状态评估技术研究。
更新日期/Last Update: 2019-08-31