一种全自动、全性能互感器校验仪整检装置的设计与实现*

文中针对现有的互感器校验仪整检装置存在的准确度低、稳定性差、变频对误差有影响、工作回路电压(电流)检定点范围小等问题,采用直角坐标系与极坐标系的转换技术、高准确度自动测量反馈技术,设计了双路幅值和相位精密可调的数字程控标准信号源,实现了频率及负载改变后,功率源的相位幅值的自动补偿,实现了互感器校验仪和二次压降测试仪的全性能自动检定和校准。该装置经第三方机构检测,技术指标和功能达到设计要求。

Design and implementation of fully automatic transformer calibrator overall test device

The existing transformer calibrator has many problems such as, low accuracy, poor stability, error interference of frequency conversion, small range of working circuit, etc., this paper focus on those problems, adopting adjustment technology of rectangular coordinate system and polar coordinate system, automatic measurement feedback technology with high accuracy, desighs an adopable digital program-control standard signal source with two channels of phase and amplitude, realizing aotumatic feedback of phase and amplitude after the frequency and load changing, realizing the aotumatic verification and calibration of transformer calibrator and PT secondary drop test instrument. The device designed in this paper has already passed the test of third-party detection mechanism, all of the technical indexes and function meet the demand.