Abstract:

Aiming at the problem of reliability and precision of on-line calibration monitoring of metering device,this paper applies the synchronous sampling technology of digital bus to the condition monitoring system of metering device,and designed the modules of PT/CT two-side acquisition terminal,line switching terminal,line control box and so on based on digital bus.By changing the on-line condition monitoring sampling mode of metering device,it can not only realize the accuracy of remote calibration,but also solve the difficult problem of high construction cost and complicated wiring in the original application.This study can provide a research basis for the integration of digital bus synchronous sampling technology into the integrated state monitoring of intelligent substation,and can also provide reference for the further standardization of the condition monitoring technology of metering device.

Key words: on-line condition monitoring, synchronous sampling, metering device, condition monitoring