摘要
变电站接地网的冲击特性研究对于接地网的优化设计具有重要意义,为能系统真实反映接地装置在不同土壤结构中的冲击特性,基于量纲相似性原理,利用冲击电流发生器进行了接地网在均匀及双层土壤中的冲击接地模拟试验。在均匀土壤中测量了5种埋深、3种冲击电流注入点位置时对应的接地网冲击接地电阻值,并测量了典型情况下接地网的地表电位分布情况;在双层土壤中测量了3种土壤厚度、3种冲击电流注入点位置时对应的接地网冲击接地电阻值。通过分析不同试验条件下接地网模型的冲击接地电阻及电位分布得到了冲击电流注入点位置、地网埋深及土壤结构等因素对接地网的冲击接地特性的影响规律。
In order to find the correct impulse characteristics of the grounding grids systematically and factually, impulse grounding experiments are carried out by employing impulse current generator in uniform and two-layer soils which is based on principle of dimension similarity. This test mainly measured impulse grounding resistance in uniform soil with five different embedment depths and three different current-injected points, potential distribution on the surface of uniform soil and impulse grounding resistance in two-layer soil with three different upper depths and three different current-injected points. The experimental results indicate that the factors such as current injection location, grid depth and soil structure have influences on the impulse characteristics of the grounding grids, and the influence regulations are described.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2008年第7期1342-1346,共5页
High Voltage Engineering
关键词
接地网
冲击模拟试验
冲击特性
影响因素
土壤结构
影响规律
grounding grid
simulation impulse experiment
impulse characteristics
influence factors
soil structure
influence regulation
作者简介
司马文霞1965-，女，教授，博导研究方向为复杂大气环境下外绝缘技术、电力系统过电压与保护研究工作电话：（023）65111172转8228
李晓丽1983-，女研究方向为电力系统过电压与接地技术
