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Electromagnetic interference determination method and system for intelligent power grid acquisition unit

A collection unit and smart grid technology, applied in the field of smart grid, can solve problems such as difficult to reproduce, poor electromagnetic interference, etc.

Pending Publication Date: 2022-04-22
CHINA ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the calculation that the probability of the A / D chip suffering from electromagnetic interference during data conversion and reading is 7.75% in the 5 positive polarity pulse tests, and it is difficult to reproduce the worst electromagnetic interference situation

Method used

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  • Electromagnetic interference determination method and system for intelligent power grid acquisition unit
  • Electromagnetic interference determination method and system for intelligent power grid acquisition unit
  • Electromagnetic interference determination method and system for intelligent power grid acquisition unit

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Embodiment 2

[0061] Based on the same inventive concept, the present invention also provides an electromagnetic interference determination system for smart grid acquisition units, such as figure 2 As shown, including: electromagnetic interference source, signal source, sensing unit and host computer control system;

[0062] The electromagnetic interference source and the signal source are respectively connected to the sensing unit;

[0063] The sensing unit is connected to the smart grid collection unit;

[0064] The host computer control system communicates with the smart grid acquisition unit;

[0065] The smart grid acquisition unit is used to determine the sampling rate of the smart grid sampling unit according to the type of the analog-to-digital conversion chip, and convert the collected analog signal into a digital signal at the sampling rate and upload it to the host computer control system;

[0066] The electromagnetic interference source is used to generate electromagnetic int...

Embodiment 3

[0081] An electromagnetic interference determining system used for a collection unit of a smart grid includes: an electromagnetic interference source, a signal source, a sensing unit, an acquisition unit, a merging unit, and a host computer control system. The electromagnetic interference source and the signal source are respectively connected to the sensing unit, and the sensing unit transmits the analog signal generated by the induction of the signal source signal and the interference signal generated by the electromagnetic interference source to the acquisition unit, and there is an A / D chip inside the acquisition unit to transmit the analog signal Converted into digital signals, the acquisition unit is connected with the merging unit, and the merging unit packs and organizes the digital signals sent by the acquisition unit and sends them to the upper computer control system. The sampling rate of the A / D chip in the acquisition unit is equal to or slightly lower than its max...

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Abstract

The invention provides an electromagnetic interference determination method for an intelligent power grid acquisition unit, and the method comprises the steps: determining the sampling rate of an intelligent power grid sampling unit based on the type of an analog-to-digital conversion chip in the intelligent power grid acquisition unit; the electromagnetic interference source generates electromagnetic interference on the smart power grid, and the electromagnetic interference is transmitted to the acquisition unit through the sensing unit; and judging whether electromagnetic interference exists or not when the sampling unit carries out sampling at the determined sampling rate based on an electromagnetic compatibility tester. According to the technical scheme provided by the invention, whether the intelligent power grid acquisition unit has electromagnetic interference or not can be quickly and accurately found.

Description

technical field [0001] The invention relates to the field of smart grids, in particular to a method and system for determining electromagnetic interference used in smart grid acquisition units. Background technique [0002] The smart substations put into operation by the State Grid Corporation of China have repeatedly encountered problems such as damage to the acquisition unit of the electronic transformer, packet loss, and abnormal communication. More and more electronic devices are arranged locally, and are close to high-voltage equipment, or even hung on the casing of high-voltage equipment, which makes electronic devices more and more susceptible to electromagnetic interference, and even fails due to electromagnetic interference, resulting in Substation shutdown, endangering the safety of the grid. The electronic transformer has been tested for electromagnetic compatibility with reference to the relevant standards of secondary equipment when it leaves the factory, but t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042G01R31/08
CPCG05B19/0423G01R31/088G05B2219/24215
Inventor 曲平肖燕赵明敏许婧赵鹏杨志超
Owner CHINA ELECTRIC POWER RES INST