摘要
给出了一种采用冲击电流发生器产生冲击电流模拟雷电流(冲击电流)测量接地电阻的装置。该测量原理是以冲击电流发生器产生的电流作为测量电流,由数据采集器采集得到测量回路中接地体内流过的电压、电流波形信号,经A/D转换后,数字信号通过快速傅里叶变换(FFT)变换到频域,并在频域内通过频谱法计算得到冲击阻抗值,最后分离冲击阻抗中的电阻和感性分量。给出了实验室、现场杆塔试验结果及EMTP仿真验证结果。
A measurement apparatus using impulse current to simulate lightening as the test current to measure grounding impedance is given, While injecting impulse current created by impulse current generator （ICG） into grounding systems, the data acquisition device collects the voltage and current signals of grounding systems respectively, which are then converted by A/D device and transformed by fast Fourier transform （FFT） into frequency domain. Through the spectrum calculation method, the impulse grounding impedance can be obtained and further divided into resistance and inductance component. Lab and field tests are performed by comparing with the magneto ohmmeter method and the effectiveness of the method proposed is verified by EMTP simulation results.
出处
《电力系统自动化》
EI
CSCD
北大核心
2008年第11期93-96,共4页
Automation of Electric Power Systems
关键词
冲击接地电阻
测量装置
冲击电流发生器
频域
impulse grounding impedance
measurement apparatus
impulse current generator
frequency domain
