A data acquisition and virtual calibration system and method for an optical fiber current transformer

Abstract

The invention provides a data acquisition system for a fiber current transformer based on virtual apparatus technology and a virtual verification system applied in the data acquisition system. According to the virtual verification system, a virtual apparatus, namely a simulation mutual inductor is used to complete the simulation process of current output signal acquisition, signal conditioning and signal detection. After the virtual process, related characteristics of the fiber current transformer are analyzed to obtain a transient characteristic and a stable state characteristic. Data acquisition, signal detection processing and characteristics analysis can be completely conveniently and reliably in high efficiency; test technology for an electronic current transformer is raised; and technology guarantee for safe and stable operation of the electronic current transformer is provided. Further, the invention also provides a virtual verification method that is used to realize the functions.

Description

Technical field [0001] The invention relates to the technical field of electronic current transformers, in particular to a data acquisition and verification system and a verification method for optical fiber current transformers. Background technique [0002] Under the substation architecture system, electronic current transformers belong to the process level equipment, and they play the role of interconnection and information interaction between the primary equipment and the secondary equipment, especially the interaction with the secondary metering, protection and control equipment. The communication interface is an important node for information exchange in the entire substation. Its working principle is to convert a larger primary current into a smaller secondary current. Among them, the light-type current sensor is a kind of electronic fiber-optic current sensor. [0003] At present, the calibration of electronic current transformers adopts the differential measurement metho...

AI Technical Summary

Problems solved by technology

However, none of the current acquisition cards can achieve strict synchronous trigger sampling, and there is a problem of sampling delay

If the sampling delay error of the acquisition card is not corrected, it will cause errors in the calibration results

[0004] Moreover, for the characteristic analysis projects of different electronic current transformers, it is necessary to build different test platforms for realization, but limited by the complexity and difficulty of operation, some characteristic analysis is difficult to complete

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