基于ATP-Draw的双层土壤中杆塔接地装置冲击特性的仿真研究

Simulation research on impulse characteristics of pole tower grounding device in double layer soil based on ATP-Draw

为研究分层土壤对接地装置冲击散流特性的影响,本文提出一种基于ATP-Draw的双层土壤中杆塔接地装置冲击特性仿真方法。采用拉普拉斯方法计算双层土壤中的水平接地体、垂直接地体的接地电阻值,以及双层土壤结构下接地装置各部分链式电路模型的电导参数、电容参数、电感参数等,搭建复杂土壤中杆塔接地装置的ATP-Draw仿真模型,该模型能够实现分层土壤中输电线路杆塔接地装置雷电冲击特性的仿真分析及冲击接地电阻的准确计算,可用于杆塔接地系统设计。

In order to study the influence of layered soil on the impulse current dispersing characteristics of grounding device.This paper proposes a simulation method for the impulse characteristics of the double-layer soil tower grounding device based on ATP-Draw.By using the Laplace method,the grounding resistance of the horizontal grounding body and the vertical grounding body in the double-layer soil are calculated.The conductivity parameters,capacitance parameters,and inductance parameters of each part of the chain circuit model of the grounding device under the double-layer soil structure are obtained.ATP-Draw simulation model of pole grounding device in complex soil is established.The proposed model can realize the simulation analysis of lightning impulse characteristics of transmission line pole grounding device in the sealed layer soil and the accurate calculation of impact grounding resistance.The contribution of this paper can be applied in the grounding system design of power transmission tower.