[1]曾磊磊,张 宇,邓志斌,等.复合绝缘子芯棒湿热老化特性研究[J].电瓷避雷器,2020,(02):196-203.[doi:10.16188/j.isa.1003-8337.2020.02.031]
 ZENG Leilei,ZHANG Yu,DENG Zhibin,et al.Study on Hygrothermal Aging Characteristics of Composite Insulator Core[J].,2020,(02):196-203.[doi:10.16188/j.isa.1003-8337.2020.02.031]
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复合绝缘子芯棒湿热老化特性研究()
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《电瓷避雷器》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2020年02期
页码:
196-203
栏目:
绝缘子
出版日期:
2020-04-25

文章信息/Info

Title:
Study on Hygrothermal Aging Characteristics of Composite Insulator Core
作者:
曾磊磊1 张 宇1 邓志斌2 饶 臻3 晏年平1 缪雪梅1 马 亮1童 超1 周龙武1 邹 阳1 刘 衍1
(1.国网江西省电力有限公司电力科学研究院,南昌 330096; 2.国网江西省电力有限公司,南昌 330077; 3.武汉大学电气工程学院,武汉 430072)
Author(s):
ZENG Leilei1 ZHANG Yu1 DENG Zhibin2 RAO Zhen3 YAN Nianping1 MIAO Xuemei1 MA Liang1 TONG Chao1 ZHOU Longwu1 ZOU Yang1 LIU Yan1
(1.Electric Power Research Institute of State Grid Jiangxi Electric Power Company, Nanchang 330096, China; 2. State Grid Jiangxi Electric Power Company, Nanchang 330077, China; 3.School of Electrical Engineering, Wuhan University, Wuhan 430072)
关键词:
复合绝缘子 玻璃钢芯棒 湿热老化特性
Keywords:
composite insulator FRP rod hygrothermal aging characteristics
DOI:
10.16188/j.isa.1003-8337.2020.02.031
摘要:
由于长期运行在湿热的气候环境下,近年来我国南方地区复合绝缘子异常发热、击穿断裂等故障时有发生,严重威胁了电网的安全稳定运行。为了研究复合绝缘子芯棒的湿热老化特性,首先对芯棒材料进行湿热老化实验,然后利用扫描电镜、红外光谱、热重分析和介电分析等手段对湿热老化和酥朽断裂芯棒进行分析,结果表明:湿热的联合作用能够显著加速芯棒的老化进程,随着湿热老化时间的增加,样品的表面微观形貌、化学基团、热解性能和介电性能均逐渐劣化,其中环氧树脂的碳链和碳氧链的吸收峰、热解剩余质量、介电参数可作为芯棒材料的老化特征参量,用以评估其老化状态; 湿热老化和酥朽断裂的芯棒均发生了环氧树脂的劣化分解和玻纤的水解与离子交换反应,环氧树脂和玻纤的劣化程度与老化时长正相关; 烘干后芯棒的介电参数显著降低,表明水分入侵对其介电性能具有重要影响,湿热老化充分考虑了这一因素,相比于其他老化方式更加全面合理。
Abstract:
Due to long-term operation in hot and humid climate, in recent years, abnormal heating and breakdown accidents of composite insulators have frequently occurred in southern China, which seriously threatens the safe and stable operation of power grid. In order to study the hygrothermal aging characteristics of composite insulator'sfiber reinforced plastic(FRP)core, the hygrothermal aging experiments were carried out firstly, and then the hygrothermal aging and operational aging samples were analyzed by means of scanning electron microscopy, infrared spectroscopy, thermo gravimetric analysis and dielectric spectroscopy. The results show that the combined effect of hot and humid environment can significantly accelerate the aging process of FRP core, with the time of hygrothermal aging. The surface morphology, chemical groups, pyrolysis properties and dielectric properties of the samples deteriorated gradually with the increase of dielectric parameters. Among them, the absorption peaks, pyrolysis residual mass and dielectric parameters of carbon and carbon-oxygen chains of epoxy resin can be used as aging characteristic parameters of mandrel materials to evaluate their aging state. The deterioration of epoxy resin and glass fibers occurs in both hygrothermal aging and operational aging FRP rod. Hydrolysis and ion exchange reaction, degradation degree of epoxy resin and glass fiber is positively correlated with aging time; dielectric parameters of mandrel are significantly reduced after drying, which indicates that moisture intrusion has an important influence on dielectric properties. Hygrothermal aging fully takes this factor into account and is more comprehensive and reasonable than other aging methods.

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备注/Memo

备注/Memo:
收稿日期:2019-10-23作者简介:曾磊磊(1993—),男,硕士,主要研究方向为输电线路绝缘材料及缺陷诊断。基金项目:国网科技项目“直流输电线路吸热型防冰材料开发与防冰闪复合绝缘子研制”(编号:52182017000X)。
更新日期/Last Update: 2020-04-25