摘要
我国电力系统因为雷击造成的事故时常发生,比如电路短路、跳闸等。然而随着我国快速发展,已经离不开电力系统,电力系统直接影响着人类的生产和生活,当电力系统因为雷击发生故障之后,就会造成比较大的影响。所以为了提高输电杆塔防雷的效果,文章对接地电阻值对其影响进行了分析,因为接地电阻值直接影响着输电杆塔防雷效果。同一个输电杆塔上设置几个不同的回线符合我国当前对电力的需求,所以文章主要针对的是同塔四回路防雷进行研究。通过实验结果表明,当接地电阻值越小,输电杆塔防雷效果将会更好;当接地电阻值小于15Ω时,电阻值不断增加时,输电杆塔的防雷水平就会越小,并且其对防雷的影响比较大;当接地电阻值大于15Ω时,电阻值不断增加,其防雷水平也会降低,此时的电阻对防雷水平影响比较小。最后为了提高输电杆塔防雷效果,提出了一些降低接地电阻值的方法。文章目的在于降低雷击对我国电力系统的影响,从而更好发挥电力系统对人类的贡献作用。
Today,accidents caused by lightning strikes frequently occur in my country’s power system,such as short circuits and trips.However,with the rapid development of my country,the power system has been inseparable.The power system directly affects human production and life.When the power system fails due to lightning strikes,it will have a relatively large impact.Therefore,in order to improve the lightning protection effect of the transmission tower,the paper analyzes the impact of the grounding resistance value,because the grounding resistance value directly affects the lightning protection effect of the transmission tower.Setting several different loops on the same transmission tower is in line with my country’s current demand for electricity,so the article mainly focuses on the four-circuit lightning protection of the same tower.According to the experimental results,the smaller the grounding resistance value,the better the lightning protection effect of the transmission tower;when the grounding resistance value is less than 15Ω,when the resistance value continues to increase,the lightning protection level of the transmission tower will be smaller,and its impact on lightning protection is greater;when the grounding resistance value is greater than 15Ω,the resistance value continues to increase,and its lightning protection level also decreases,at this time,the resistance has little effect on the lightning protection level.Finally,in order to improve the lightning protection effect of the transmission tower,some methods for reducing the grounding resistance value are proposed.The purpose of the paper is to reduce the impact of lightning strikes on my country’s power system,so as to better play the role of power system’s contribution to humans.
作者
张明旭
王军
闫敏
梁利辉
王春明
温润贤
Zhang Mingxu;Wang Jun;Yan Min;Liang Lihui;Wang Chunming;Wen Runxian(State Grid Hebei Electric Power Company Maintenance Branch,Shijiazhuang 050000,China;Fujian Youdi Electric Power Technology Co.,Ltd.,Fuzhou 350008,China)
出处
《粘接》
CAS
2021年第4期150-153,173,共5页
Adhesion
基金
国家电网公司科学技术项目研究成果(kj2018-036)。
关键词
接地电阻值
输电杆塔
防雷
ground resistance
transmission tower
lightning protection
