Automated adjustment system for comprehensive multi-parameter electrical measuring instrument and adjustment method

Abstract

The invention discloses an automated adjustment system for a comprehensive multi-parameter electrical measuring instrument and an adjustment method. The system comprises an upper computer and a harmonic power source; a multifunctional standard meter is arranged in the harmonic power source, the harmonic power source is connected with every multi-parameter electrical measuring instrument to be detected, and every multi-parameter electrical measuring instrument to be detected is tested by the harmonic power source through various output testing signals in different states; the upper computer is respectively connected with the harmonic power source and every multi-parameter electrical measuring instrument to be detected and is used for transmitting an electrical measurement value measured by the multifunctional standard meter into every multi-parameter electrical measuring instrument to be detected, and the measured value of every electrical measuring instrument to be detected is adjusted according to the electrical measurement value; and the upper computer is also used for reading the electrical measurement value of the harmonic multifunctional standard meter and the measured value of every multi-parameter electrical measuring instrument to be detected, calculating an error value between the electrical measurement value and the measured value, and generating a detection report. The system has the advantages of high efficiency of debugging and verification and high accuracy of calibration; no artificial error can be caused; and the labor burden of enterprises can be eased.

Description

Technical field [0001] The invention relates to the field of electric power instrumentation, in particular to an automatic adjustment system and adjustment method for a comprehensive multi-parameter electric measuring instrument. Background technique [0002] In the current electric power and petrochemical industries, comprehensive multi-parameter electrical measurement instruments are more and more widely used. The measurement of phase voltage, line voltage, current, zero sequence current, apparent power, active power, and reactive power are integrated in a single instrument. Power, power factor, frequency and many other measurement functions, with more high-end functions such as harmonic analysis, you can also set the wiring mode of the meter, it can be set to three-phase three-wire or three-phase four-wire mode, and it also has remote signaling and remote control. And other functions bring great convenience to users, but it poses great challenges to the calibration and testing...

AI Technical Summary

Problems solved by technology

You can also use a standard source to save the time of manual and repeated adjustments when using a power source, but the standard source is more expensive

Generally speaking, manual calibration is time-consuming and labor-intensive, and it is prone to human error or omission of certain points

[0004] The most widely used automatic meter checking device in the meter industry is the electric energy meter calibration device. Its principle block diagram is attached figure 1 As shown, the electric energy pulse of the standard meter 20 is sent to the first electric energy meter 51, the second electric energy meter 52 ... the nth electric energy meter 5n and other n tables, by the error calculator of each table (the corresponding first electric energy meter Error calculator 41, second error calculator 42... nth error calculator 4n) calculate the error of the electric energy meter of the tested meter according to the ratio of the electric energy pulse of the standard meter and the electric pulse of the tested meter, but it cannot calculate the error of each electric energy The calibration coefficient inside the table is changed, and the test error of other items cannot be displayed

Therefore, it cannot be used for debugging and calibration of comprehensive multi-parameter electrical measuring instruments

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