【摘要】 采用计算机辅助接地阻抗测量设备 ,可以克服传统的电压降测量法的种种弊端。这种设备引入的是测量接地点与辅助接地点之间的暂态电流。它测量被测接地点的接地电势差 ,利用校正的方法消除外部噪声的影响 ,再用估测的方法 ,测得接地电势的升高值和接地阻抗值。更多还原

【Abstract】 Application of PC based instrument for ground impedance measurement can overcome the shortcomings in traditional voltage drop measurements.The instrument inject a transient electric current between the ground under measurement and and auxilizry ground,and it measures the ground potential differences (GPDS)around the ground points under measurement.The GPD measurements are processed with software which rejects external noise using correlation methods.Subsequently,estimation methods are used to extract the ground potential rise and ground impedance.更多还原