摘要
电网因其独特的架设方式以及线路特征,导致其感应电压大、绝缘耐受水平低并且易遭受雷击,而由雷击引起的输电线路故障是电气教学的典型案例。为了分析电力设备绝缘和过电压耐受力,这就有必要对雷击所产生的电磁瞬态过程进行分析.本文以电磁瞬态分析程序EMPT为基础,通过构建ATPDraw模型,计算配电线路在雷击时的瞬态过电压,得到电网过电压的变化规律,掌握电网的安全运行规律。
The unique erection mode and characteristics of the grid,lead to the high induced voltage and low insulation of the grid,and make the grid vulnerable to attack by the lightning strike.That is a classical example for the teaching of the electrical engineer.In order to analyze the insulation and overvoltage tolerance of power devices,it is necessary to study the electromagnetic transient process caused by the lighting.Based on the electromagnetic transient electromagnetic analysis program(EMPT),the model of the grid is designed,the lightning transient overvoltage is calculated for the distribution circuit,the overvoltage distribution and change rule is got,and master the safe operation rule for the grid.
作者
张辑
魏才柱
Zhang Ji;Wei Caizhu(School of Electrical Engineering and Automation,Xiamen University of Technology,Xiamen Fujian,361024)
出处
《电子测试》
2019年第21期75-78,共4页
Electronic Test
基金
厦门理工学院教改项目“发电厂电气部分教学方法研究”和”检测与传感技术教学方法”资助
关键词
雷电流特征
配电线路
瞬态过电压
EMTP
lightning current characteristics
Distribution line
Transient overvoltage
EMTP
