Automatic correction device and correction method for precision of analog quantity of power distribution terminal

Abstract

An automatic correction device and a correction method for the precision of the analog quantity of a power distribution terminal relate to the technical field of electrical equipment to solve the technical problems of low correction precision and low production efficiency. The device comprises a digital signal controller, a test current output piece, a test voltage output piece, a multi-channel digital-to-analog converter, and a multi-channel analog-to-digital converter, wherein the multi-channel digital-to-analog converter and the multi-channel analog-to-digital converter are connected to the digital signal controller; the digital signal controller is provided with a serial communication interface and an Ethernet interface; the digital signal controller controls the multi-channel digital-to-analog converter to output eight paths of test signals to the power distribution terminal and recovers eight paths of test signals through the multi-channel analog-to-digital converter, a closed-loop control mode is adopted to regulate the output precision of the eight paths of test signals, the digital signal controller acquires the data of the power distribution terminal through the serial communication interface and the Ethernet interface, and the data of the power distribution terminal are automatically compared with the eight paths of test signals to implement automatic correction. According to the device and the method provided by the invention, the correction precision is high, and the human input is reduced.

Description

technical field [0001] The invention relates to electric power equipment technology, in particular to a technology of an automatic verification device and a verification method for the accuracy of an analog quantity of a power distribution terminal. Background technique [0002] Before the power distribution terminal is applied in the field, in order to ensure its functional performance indicators, especially the accuracy indicators of analog quantities, it must be calibrated. [0003] The traditional power distribution terminal verification method is to use the relay protection tester to input the three-phase four-wire test current and test voltage to the power distribution terminal to be tested, and then manually compare and record the measurement data of the power distribution terminal. It requires a lot of manpower, the work efficiency is very low, and the accuracy of the test current and test voltage output by the relay protection tester is relatively low, and there are...

AI Technical Summary

Problems solved by technology

[0003] The traditional power distribution terminal calibration method is to use the relay protection tester to input the three-phase four-wire test current and test voltage to the power distribution terminal to be tested, and then manually compare and record the measurement data of the power distribution terminal. It requires a lot of manpower, the work efficiency is very low, and the accuracy of the test current and test voltage output by the relay protection tester is relatively low, and there are certain errors, which will affect the accuracy of the accuracy verification of the analog quantity of the power distribution terminal

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