配电网中变压器高频阻抗特性分析

Analysis of Impedance Characteristic of High Frequency Transformers in Distribution Network

变压器是电力系统中重要的电气设备之一.为提高配电网的通信效率,对高频信号下变压器阻抗特性的研究是十分必要的.分析了常用的高频阻抗测试方法,通过对变压器离线时阻抗测量数据分析,得到变压器在信号频率为500kHz^1MHz频率范围内的阻抗特性,并对变压器高频模型进行修正,最后通过Simulink仿真验证了其正确性,为配电网载波通信系统阻抗特性研究提供参考.

The transformer is one of the most important electrical equipment in power system. In order to improve the efficiency of communication in distribution network, it is very necessary to study the impedance characteristics of transformers in high fre- quency. This paper analyses the commonly used measurement of impedance. Through analysis of a series of measurement data of the transformer impedance, we get the impedance characteristics of transformer in the frequency from 500 KHZ to 1 MHZ and give the correction model of transformers in high frequency. Finally the simulation results by Simulink verify its correct- ness, and provide reference for the study of the impedance characteristics of carrier communication system in distribution net- work.