摘要
针对目前尚无适合于现场测量杆塔冲击接地电阻的仪器,基于冲击接地电阻测量理论,研制了一台便携式杆塔冲击接地电阻测量仪,可采用波头较缓、幅值较低的冲击电流作入射波测得接地体的电压响应,再应用数学变换法获得高幅值标准雷电流下杆塔的冲击接地电阻。仿真计算和现场实测验证结果表明,该仪器抗干扰能力强,已具备工程应用雏形。
There is no suitable on-site for the tower impulse grounding resistance measuring instrument.Based on the impulse grounding resistance measurement theory,this paper develops a portable impulse grounding resistance measuring instrument.Impulse current by more moderate and lower amplitude can be used as the incident wave,which measures voltage response under the current of grounding.And then the mathematical transformation method is used to obtain the impulse grounding resistance of tower under high-amplitude standard lightning current.The results of simulation calculation and on-site measurement show that this measuring instrument has strong anti-interference ability and it has prototype of engineering application.
出处
《水电能源科学》
北大核心
2011年第2期153-156,共4页
Water Resources and Power
关键词
便携式
杆塔地网
雷电流
冲击接地电阻
数学变换
测量仪
portable
tower ground network
lightning current
impulse grounding resistance
mathematical transformation
measuring instrument
