Direct current large current standard source output method and device based on parallel confluence

A technology of DC output and output method, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of large size, difficult verification work, cumbersome equipment, etc., to achieve high output accuracy, flexible and convenient expansion and simplification, and output current. big effect

Active Publication Date: 2017-05-31
STATE GRID HUNAN POWER SUPPLY SERVICE CENT (METROLOGY CENT) +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the high-precision and large-output DC sources in the laboratory usually have the problems of large volume and heavy equipment, it is very difficult to move to the field to carry out on-site verification work

Method used

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  • Direct current large current standard source output method and device based on parallel confluence
  • Direct current large current standard source output method and device based on parallel confluence
  • Direct current large current standard source output method and device based on parallel confluence

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Embodiment Construction

[0037] Such as figure 1 As shown, the implementation steps of the DC high-current standard source output method based on parallel converging in this embodiment include:

[0038] 1) The output terminals of each DC output unit used to output DC current are connected in parallel in advance, and the upper computer sends a synchronous trigger pulse to each DC output unit to determine whether the signal output between each DC output unit is synchronized. If each DC output unit If the signal output is not synchronized between, jump to step 1); otherwise, jump to step 2);

[0039] 2) Send current output instructions to each DC output unit through the host computer;

[0040] 3) Each DC output unit analyzes the current output command to obtain the harmonic content and harmonic phase value of the current to be generated, and generates an analog current signal I of the specified frequency according to the harmonic content and harmonic phase value of each harmonic. 0 ; Each DC output unit samples...

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Abstract

The invention discloses a direct current large current standard source output method and device based on parallel confluence. The method comprises a step of ensuring the signal output synchronization of each direct current output signal through a host machine and emitting a current output instruction to each direct current output unit, a step of allowing each direct current output unit to analyze the current output instruction to obtain each subharmonic content and harmonic phase value of current to be generated, and generating an analog current signal I0 of a specified frequency and carry out closed loop feedback to obtain output direct current, and finally carrying out parallel confluence and outputting of the output direct current of each direct current output unit. The device comprises a host computer and more than two direct current output units, and each of the direct current output units comprises a control unit, a ripple output module, an error amplifier, a current power amplifier standard source, and a direct current sensor. The method and the device have the advantages of large output current, high output precision, flexible and convenient expansion and simplification, and a wide application range.

Description

Technical field [0001] The invention relates to a high-precision DC high-current output DC source used for DC meter calibration and DC current metering and traceability, in particular to a parallel convergent-based DC high-current standard source output method and device. Background technique [0002] The rapid development of power electronics technology has led a new round of technological revolution. Currently, DC technology is developing rapidly, and technologies such as electric vehicles and UHV DC transmission have moved from the exploration stage to maturity. Electric vehicles have become one of the most popular industries in the world. The well-known American Tesla, domestic BYD E series, etc., have all entered the market; Zixiangjiaba-Shanghai, Jinping-Sunan, etc. ±800kV Since the UHV DC transmission project was put into operation, more than 10 UHV DC transmission lines have been built or under construction in China. [0003] The application of DC technology has also prom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 王海元李恺陈向群李劲柏杨茂涛柳宇航彭潇黄红桥卜文彬
Owner STATE GRID HUNAN POWER SUPPLY SERVICE CENT (METROLOGY CENT)
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