基于分布式同步授时技术的二次压降检测设计  

Design of Measuring Secondary Voltage Drop Based on Distributed Synchronizing Clock

作　　者：石娜[1] 金心宇[1] 

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《仪表技术与传感器》2008年第10期88-90,共3页Instrument Technique and Sensor

摘　　要：针对电压互感器二次回路压降间接测量法误差大的问题,提出了一种新的无线测量方法。引入GPS的分布式同步授时技术作为电压互感器端和电表端的同步信号;并且利用CPLD电路作为回路分析模块的控制中心,实现分频、高精度计数、锁存及数据选择等逻辑功能,保证了比差和角差测量的可靠性和准确性。实测结果表明:比差误差小于0.01%,角差误差小于0.3,′验证了该方法的有效性。In order to solve the problem of low accuracy in the voltage transformer secondary circuit voltage drop indirect measurement, a new wireless measuring method was introduced. The distributed synchronizing clock based on GPS was used to synchronize voltage transformer and meter. CPLD circuit was applied to be a control center of circuit analyzing module. It realized dividing frequency, high precision counting, latching, data selector and other logic function to guarantee reliability and veracity of ratio difference and angle difference. The result indicates that ratio difference and angle difference is less than 0. 01 percent and 0. 3′ respectively. The method is proved effective.

关 键 词：电压互感器 同步测量 二次回路压降 过零比较 

分 类 号：TM451[电气工程—电器]