摘要
传统铁横担上使用的绝缘子雷电冲击50%击穿电压(U50%)比较低,存在绝缘导线雷击断线的情况。因此,绝缘性能好、强度高、质量轻的复合绝缘横担开始受到人们的广泛关注,有利于提高配电网的耐雷水平。为了进一步研究复合绝缘横担的防雷性能,本文在不同海拔地区开展雷电冲击闪络试验,得到了10 kV复合绝缘横担的U50%和伏秒特性曲线。并在试验的基础上,利用电磁暂态程序(ATP-EMTP)建立了10 kV线路雷击仿真模型,分析计算复合绝缘横担的耐雷水平。结果表明:在海拔为22 m地区,复合绝缘横担的正、负极性U50%分别为415.43 kV和589.14 kV,而针式绝缘子的正、负极性U50%分别为151.05 kV和200.77 kV。在海拔为2 100 m地区,复合绝缘横担的耐雷水平降低了20%左右,但仍远高于针式绝缘子。因此,复合绝缘横担展现出优异的防雷性能,具有广阔的应用前景。
The lightning impulse 50% breakdown voltage(U50%) of the insulators used on the traditional iron cross-arm is relatively low, which leads to lightning breakage of the insulated conductor. Therefore, the composite insulated cross-arm,with good insulation performance, high strength, and light weight, has received significant attention and can help to improve the lightning resistance level of distribution network. In order to further study the lightning protection performance of the composite insulated cross-arm, lightning impulse flashover tests were conducted at different altitudes to obtain the U50%and volt-second characteristic curves of the 10 kV composite insulated cross-arm. On the basis of the tests, a lightning strike simulation model of 10 kV lines was established by using the ATP-EMTP software to calculate the lightning resistance level of the composite insulated cross-arm. The results show that at an altitude of 22 m, the positive and negative polarities of U50%of the composite insulated cross-arm are 415.43 kV and 589.14 kV, respectively, while those of the pin insulator are 151.05kV and 200.77 kV, respectively. At an altitude of 2 100 m, the lightning resistance level of the composite insulated cross-arm decreases by about 20%, but it is still much higher than that of the pin insulator. Therefore, the composite insulated crossarm shows excellent lightning protection performance and has broad application prospects.
作者
刘云鹏
陈旭彬
刘贺晨
王平
刘磊
LIU Yunpeng;CHEN Xubin;LIU Hechen;WANG Ping;LIU Lei(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding 071003,China;Electric Power Research Institute of China Southern Power Grid,Guangzhou 510000,China)
出处
《绝缘材料》
CAS
北大核心
2023年第3期107-114,共8页
Insulating Materials
基金
国家自然科学基金资助项目(52007062)
中央高校基本科研业务费专项资金资助(2020MS088)。
关键词
复合绝缘横担
雷电冲击闪络试验
伏秒特性
耐雷水平
composite insulated cross-arm
lightning impulse flashover test
volt-second characteristic
lightning resistance level
作者简介
刘云鹏(1976-),男(汉族),安徽六安人,教授,博士,主要从事特高压输电技术、电气设备在线检测和外绝缘方面的研究工作;通信作者:刘贺晨(1989-),男(汉族),河北衡水人,副教授,博士,主要研究方向为新型工程电介质材料研发及评估。
