三相三线两元件电能表的逆相序判断  

The Inverse Phase Sequence Estimation of Two Elements Three Phase Three Line Electric Energy Meter

作　　者：胡志刚 

机构地区：[1]宁波三星电气股份有限公司,浙江宁波315191

出　　处：《电测与仪表》2009年第8期31-32,38,共3页Electrical Measurement & Instrumentation

摘　　要：在使用ADE7758ARW计量芯片设计的三相三线多功能电能表中,由于ADE7758ARW芯片只能提供三元件的逆相序信息,而不能提供两元件逆相序信息的实际情况,本文介绍了通过计量芯片获取电压过零点(ZERO-CROSSING DETECTION)的信息,计算出不同线电压过零点的时间间隔,结合不同相序时电压过零点时间间隔的差异实现两元件三相三线电能表的逆相序判断。When use the multifunction meter that adopts ADE7758ARW metering IC to design, we can＇t obtain the real inverse phase sequence information of two elements three phase three line meter by ADE7758ARW metering IC directly, since it only supports the same information of three elements three phase three line meter. This chapter introduces a special method to deal with this problem. First, we can detect the ZERO-CROSSING DETECTION information of the voltage that on the metering IC. Then we use the information to calculate the interval between the zero-crossing time of different line voltage. At last, we compare the interval values with the theoretical values, and obtain the differences to realize the inverse phase sequence estimation of two elements three phase three line electric energy meter.

关 键 词：逆相序 电能表 电压过零点 ADE7758ARW计量芯片 

分 类 号：TM933[电气工程—电力电子与电力传动]