经电子互感器接入静止式电能表的检定方法

Verification method for static meters connected via electronic transformer

随着小模拟量电压信号电子互感器的推广应用,需要对与其配套的经电子互感器接入的静止式电能表进行检定试验。此类电能表与传统电磁式互感器的电能表在输入信号、检定方式等方面存在不同,检定设备及方法也有变化。由于没有相应的检定设备,需利用传统的三相电能表的标准检定装置,结合标准信号转换装置进行电能表准确度试验,同时检定项目增加小模拟量电压信号的阻抗匹配测试。论文介绍的检定方法,为推广经电子互感器接入的静止式电能表在电子互感器计量系统中的应用,提供了重要的检定方法和依据。

With the popularization and application of the electronic transformer with small analog voltage signal, it is necessary to test the static meters connected via electronic transformer matched with it. This kind of meter is different from the traditional electromagnetic transformer in input signal, calibration methods and other aspects, and the calibration equipment and methods are also changed. Because there is no corresponding calibration equipment, it is necessary to adopt the traditional three-phase power meter standard calibration device, combined with the standard signal conversion device to carry out the accuracy test of the electric energy meter, and to add a small analog voltage signal impedance matching test to the calibration project. The verification method introduced in this paper provides an important verification method and basis for popularizing the application of static meters connected via electronic transformer in electronic transformer measurement system.