A Sampling Adaptive DC Electronic Transformer Detection Converter

Abstract

The application provides a sampling self-adaptive DC electronic transformer detection converter, which controls the channel switching of the first input channel, the second input channel and the third input channel of the multiplexer through the main control module to realize high current The input signal is input from the first input channel port and converted into a small voltage signal through milliohm-level precision resistance, and the small current input signal is converted into a small voltage signal through the conventional tight resistance input from the second input channel port, and the small voltage signal is converted into a small voltage signal by the third input The channel port input realizes that large current input signals, small current input signals and small voltage signals can be adaptively converted through the converter of this application, and can complete the sampling of different types of analog input signals and convert them into correspondingly coded digital The signal is sent to the calibrator body device at the back end to realize the closed-loop calibration of the DC transformer, which solves the technical problem that the current closed-loop test of the DC transformer requires repeated replacement of the converter.

Description

technical field [0001] The invention relates to the technical field of direct current transformers, in particular to a sampling self-adaptive direct current electronic transformer detection converter. Background technique [0002] The DC transformer provides accurate and reliable sampling and measurement information. Its operation reliability and measurement accuracy are directly related to the operation stability and reliability of the DC control and protection system. It is an important link in the DC transmission system. In order to ensure the reliable operation of the DC transformer, it is necessary to carry out pre-commissioning tests and periodic regular inspections on the DC transformer. During on-site operation, due to the lack of relevant standard procedures and unified and perfect on-site verification methods and test devices, the on-site test of DC transformers can generally only be performed on DC open-loop tests. This test method not only requires extremely high...

AI Technical Summary

Problems solved by technology

[0008] Therefore, it is necessary to design a converter that can automatically switch interfaces and handle small voltage signals, small current signals and high current signals, so as to solve the technical problem that the current DC transformer closed-loop test needs to replace the converter repeatedly

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