摘要
在配电网接地故障定位中,常常要对复阻抗进行在线测量。本文提出一种复阻抗在线测量系统的实现方案,采用DDS和可编程开关电容滤波器,保证了对50Hz电网谐波的滤除以及多频率下增益的稳定性,实现了多频率下对复阻抗的精确测量。
On-line impedance measurement is very important in the grounding fault location in distribution systems. An implementation of on-line impedance measurement system is presented in this paper. With DDS and programmable SCF, a good attenuation of the 50Hz and its harmonic wave and a stable gain in multi-frequency measurement is ensured.
出处
《电子测量技术》
2008年第1期118-120,共3页
Electronic Measurement Technology
关键词
阻抗
在线测量
多频率
impedance
on-line measurement
multi-frequency
