电工技术学报  2020, Vol. 35 Issue (12): 2662-2671    DOI: 10.19595/j.cnki.1000-6753.tces.190713
高电压与绝缘 |
自然环境绝缘子长串覆冰直流闪络特性
蒋兴良, 邹佳玉, 韩兴波, 刘延庆, 陈宇
输配电装备及系统安全与新技术国家重点实验室(重庆大学) 重庆 400044
DC Flashover Characteristics of Natural Environment Insulators Covered with Ice
Jiang Xingliang, Zou Jiayu, Han Xingbo, Liu Yanqing, Chen Yu
State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China
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摘要 输电线路绝缘子的覆冰将严重影响其电气性能,危害输电线路的运行安全。直流输电具有线路造价低、运行损耗小、节省线路走廊、能非同期连接两个交流电网等优点,适用于大容量、远距离输电,促成了我国“西电东送”和“北电南送”的电能传输格局。该文在重庆大学雪峰山自然覆冰试验基地进行自然覆冰直流闪络试验。研究表明,长串绝缘子在自然覆冰情况下的直流冰闪电压随污冰参数(ISP)呈负幂函数变化。自然条件下,LXY-160型、XWP-210型和FXBW-220/100型等绝缘子的直流冰闪试验显示,干弧最小闪络电压梯度受绝缘子爬电距离和干弧距离共同影响,XWP-210绝缘子在覆冰污秽地区的外绝缘效果最好。此外,在重庆大学多功能人工气候室进行人工覆冰试验,将试验结果进行压强换算后,与自然覆冰结果进行了对比。自然覆冰比人工覆冰的直流冰闪电压更高,分散性更大。试验结果可为超高压直流输电线路外绝缘设计提供参考。
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蒋兴良
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关键词 直流污冰参数自然覆冰闪络特性    
Abstract:Icing of insulators in transmission line will seriously affect its electrical performance and endanger the operation safety. DC transmission has the advantages of low cost, low power loss during operation, saving line corridor and the ability to connect two AC power networks, and so on. It is suitable for large capacity and long distance transmission, and promotes the power transmission pattern of “power transmission from west to east” and “power transmission from north to south” in China. In this paper, the natural icing DC ice flashover test was carried out at the natural icing test base of Xuefeng Mountain, Chongqing University. The results show that under the condition of natural icing, the DC ice flashover voltage varies with the pollution ice parameter ISP in a negative power function. Under natural conditions, the DC ice flashover tests of LXY-160, XWP-210 and FXBW-220/100 insulators show that the minimum flashover voltage gradient of dry arc is affected by both creeping distance and dry arc distance of insulators, and the external insulation effect of XWP-210 insulator is the best in the area covered with ice and pollution. In addition, the artificial icing experiment was carried out in the multi-function artificial climate room of Chongqing University. After the air pressure conversion of the experimental results, compared with the natural icing results, it is known that the DC ice flash voltage of natural icing is higher and the dispersion is greater than that of artificial icing. The test results can provide a reference for the external insulation design of EHV DC transmission lines.
Key wordsDC    ice stress product    nature icing    flashover performance   
收稿日期: 2019-06-12     
PACS: TM85  
基金资助:国家自然科学基金重点项目(51637002)和国家电网公司总部科技项目(521999180006)资助
通讯作者: 邹佳玉 女,1995年生,硕士研究生,研究方向为自然覆冰状态下绝缘子长串的直流闪络特性。E-mail: 735196945@qq.com   
作者简介: 蒋兴良 男,1961年生,教授,博士生导师,研究方向为高电压绝缘技术、气体放电以及输电线路覆冰及防护。E-mail: xljiang@cqu.edu.cn
引用本文:   
蒋兴良, 邹佳玉, 韩兴波, 刘延庆, 陈宇. 自然环境绝缘子长串覆冰直流闪络特性[J]. 电工技术学报, 2020, 35(12): 2662-2671. Jiang Xingliang, Zou Jiayu, Han Xingbo, Liu Yanqing, Chen Yu. DC Flashover Characteristics of Natural Environment Insulators Covered with Ice. Transactions of China Electrotechnical Society, 2020, 35(12): 2662-2671.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.190713          https://dgjsxb.ces-transaction.com/CN/Y2020/V35/I12/2662