摘要
为获取特高压1000k V输电杆塔接地装置的冲击阻抗特性,采用一种能够稳定输出小幅值8/20μs标准雷电流作为入射波的便携式仪器,同时测量接地装置的暂态响应电压。对上海地区特高压1000k V安塘线典型输电杆塔在四个塔腿与接地装置全部联接、解开的两个工况下,进行了多次测试并记录数据。对时、频域冲击阻抗基于数字采集获取的电流、电压波形信号进行了特性分析,以及结果稳定性对比。结果分析表明,该方法测试手段简便,测试结果稳定,时、频域冲击阻抗分析结果能够较准确地反映输电杆塔接地装置在冲击电流下的基本特性。
For obtaining impulse impedance characteristics for grounding device of UHV 1000 k V transmission tower,a portable instrument is used as the incident wave source to the grounding device,which stably outputs a8 /20μs standard lightning current with simultaneous measurement of the response transient voltage. Tests and data recording were done to a typical tower of UHV 1000 k V An-Tong line in Shanghai Area under two conditions,the four tower legs connected or unconnected to the ground device. Transient grounding resistance in time and frequency domain（ TGRT and TGRF） are analyzed and compared based on the measured current and voltage waveshapes.Results show that the testing method is simple,test results are stable and the TGRT and TGRF can accurately reflect the basic physical properties of the grounding device of transmission tower.
出处
《电工电能新技术》
CSCD
北大核心
2016年第9期74-80,共7页
Advanced Technology of Electrical Engineering and Energy
关键词
1000kV
输电杆塔
接地装置
冲击阻抗
现场测试
时、频域分析
1000kV
transmission tower
grounding device
impulse impedance
on-site rest
analysis in time and frequency domain
