矿用乙丙橡胶电缆绝缘电热老化状态评估
Insulation state assessment of mine-used ethylene propylene rubber cable under electro-thermal aging
【索引】门汝佳,雷志鹏,吝伶艳,等.矿用乙丙橡胶电缆绝缘电热老化状态评估[J].工矿千亿国际app下载,2019,45(4):67-71.
【Reference】MEN Rujia,LEI Zhipeng,LIN Lingyan,et al.Insulation state assessment of mine-used ethylene propylene rubber cable under electro-thermal aging[J].Industry and Mine Automation,2019,45(4):67-71.
【DOI】10.13272/j.issn.1671-251x.2019010038
【作者】门汝佳1,2,雷志鹏1,2,吝伶艳1,2,张国栋3,赵瑞雪1,2,朱剑飞1,2,许春雨1,2,宋建成1,2,田慕琴1,2
【Author】MEN Rujia1,2,LEI Zhipeng1,2,LIN Lingyan1,2,ZHANG Guodong3,ZHAO Ruixue1,2,ZHU Jianfei1,2,XU Chunyu1,2,SONG Jiancheng1,2,TIAN Muqin1,2
【作者机构】1.太原理工大学 矿用智能电器技术国家地方联合工程实验室, 山西 太原030024; 2.太原理工大学 煤矿电气设备与智能控制山西省重点实验室, 山西 太原030024;3.国网晋城供电公司, 山西 晋城048000
【Unit】1.National and Provincial Joint Engineering Laboratory of Mining Intelligent Electrical Apparatus Technology, Taiyuan University of Technology, Taiyuan 030024, China; 2.Shanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control, Taiyuan University of Technology, Taiyuan 030024, China; 3.State Grid Jincheng Power Supply Company, Jincheng 048000, China
【摘要】针对乙丙橡胶电缆在电热作用下的绝缘老化特性研究较少的问题,对矿用乙丙橡胶电缆进行了电热联合老化试验,分析了乙丙橡胶电缆绝缘在不同老化时间下的极化/去极化电流特性,提出了反映绝缘老化程度的特征参量——老化指数和去极化电量。结果表明,随着老化时间的增加,乙丙橡胶电缆绝缘表面颜色由白色逐渐加深变为棕色,老化后期绝缘外层生成白色粉末状物质,绝缘内形成较多孔洞;绝缘的极化电流和去极化电流均随老化时间的增加逐渐增大,其中去极化电流在老化前期变化明显,在老化后期变化较小;分别根据极化电流和去极化电流计算得到的老化指数和去极化电量均随老化时间的增加而增大,可作为评估乙丙橡胶电缆绝缘老化状态的特征参量。
【Abstract】There are few studies on insulation aging characteristics of ethylene propylene rubber cable under electro-thermal aging. According to the above problem, electro-thermal aging test of mine-used ethylene propylene rubber cable was carried out, polarization and depolarization current characteristics of ethylene propylene rubber cable insulation under different aging time were analyzed, and characteristic parameters which could reflect insulation aging degree including aging index and depolarization charge quantity were proposed. The results show that color of insulation surface of ethylene propylene rubber cable gradually changes from white to brown with increase of aging time. In the late aging stage, white powdered material is generated in outer insulation layer, and many holes are formed in the insulation. Polarization current and depolarization current of the insulation increase gradually with increase of aging time. Change of the depolarization current is obviously in the early aging stage and small in the late aging stage. Aging index calculated by the polarization current and depolarization charge quantity calculated by the depolarization current increase with increase of aging time, which can be used as characteristic parameters to evaluate insulation aging state of ethylene propylene rubber cable.
【关键词】 矿用乙丙橡胶电缆; 电热老化; 绝缘老化; 极化电流; 去极化电流; 老化指数; 去极化电量
【Keywords】mine-used ethylene propylene rubber cable; electro-thermal aging; insulation aging; polarization current; depolarization current; aging index; depolarization charge quantity
【文献出处】工矿千亿国际app下载,2019年4期
【基金】国家自然科学基金资助项目(51577123);NSFC-山西煤基低碳联合基金资助项目(U1510112)
【分类号】TD611
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