基于AD734的高频阻波器阻塞特性的测量方法分析  

High frequency blocking characteristics measurement of the power line trap based on AD734

作　　者：张国志[1] 张军[1] 

机构地区：[1]河南送变电建设公司,河南郑州450051

出　　处：《电力系统通信》2006年第8期41-44,共4页Telecommunications for Electric Power System

摘　　要：提出了一种依据相关性原理、利用结合模拟乘法器AD734精密测量高频电力阻波器的频率阻塞特性的方法,详细阐述和分析了通过一对同频正交参考信号对待检信号进行相位检测处理的过程,并总结出了一套实用便捷的阻波器阻抗及电阻分量的计算公式(避免了繁琐的三角函数运算)。同时,给出了该测试系统的硬件实现方法,并就一种典型的宽带阻波器参数进行了仿真,其结果证实了该测试的有效性。以上述方法建立起来的测试系统具有抗噪声性能好、测试精密度速度快、易实现和造价低等优点,适用于线路停电情况下的阻波器在线测量。This paper presents an approach that can accurately measure the frequency-impedance characteristics of the power line trap. It expatiates and analyzes in detail the process of signal phase detecting by making use of a pair of orthogonal signals. A group of formulas for calculating the impedance and resistance component is summarized, so it helps to avoid the fussy trigonometric function calculation. Also, it puts forward a hardware implement of this measuring system. Simulation of a kind of wide band line trap with typical parameters is performed. The result of the simulation demonstrates the validity of the method. The testing system established with this method possesses the advantage of high accuracy, high speed, being easy to realize and low cost, and has the ability of online measuring application.

关 键 词：高频电力阻波器 相关性原理 鉴相器 频率合成器 

分 类 号：TM773[电气工程—电力系统及自动化]