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An optical direct current measuring device for high voltage direct current transmission

A technology of high-voltage direct current transmission and direct current, applied in the direction of measuring devices, measuring only current, measuring electrical variables, etc., can solve the problems of easy burning and failure of laser emitting devices, harsh working environment, and easy damage, etc., to avoid heat generation problem, avoid tip discharge, long life effect

Active Publication Date: 2021-06-08
BEIJING SIFANG JIBAO AUTOMATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working environment of the analog-to-digital conversion device containing electronic components is usually harsh at the high-voltage end, and it is easy to be damaged
The high-voltage photocell of the laser energy supply circuit, the optical fiber circuit for laser energy supply, and the laser emitting device are prone to burnout and failure over time

Method used

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  • An optical direct current measuring device for high voltage direct current transmission
  • An optical direct current measuring device for high voltage direct current transmission
  • An optical direct current measuring device for high voltage direct current transmission

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Embodiment Construction

[0040] The technical solution of the present invention will be further introduced in detail below in conjunction with the accompanying drawings of the description.

[0041] figure 1 Schematic diagram of the optical DC current measurement device for HVDC transmission, figure 2 It is the schematic diagram of the sensing circuit of the 800kV flexible DC current measuring device, image 3 It is the composition diagram of the high-speed modulation and demodulation unit of the 800kV flexible DC current measuring device, Figure 4 It is the working flow diagram of the 800kV flexible DC current measuring device.

[0042] The invention discloses an optical direct current measuring device for high-voltage direct current transmission, which comprises a sensing optical fiber ring body 2, an upper flange structure 3, an upper equalizing ring 1, an upper high-voltage polarization-maintaining optical fiber insulator 4, and a middle equalizing ring 6 , the middle pressure equalizing ring ...

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Abstract

An optical DC current measurement device for high-voltage direct current transmission. The primary high-voltage end adopts an all-fiber sensing method, the primary end and the secondary end adopt a polarized light transmission scheme in which segmented folded silicone rubber insulators are pre-embedded with polarization-maintaining optical fibers, and the secondary end adopts A high-speed optical modem scheme enables DC current measurement. The sensing optical fiber ring body and the upper flange structure are located on the top of the upper high-voltage polarization-maintaining optical fiber insulator, the upper pressure equalizing ring is located on the outer circumference of the sensing optical fiber ring body, the middle pressure equalizing ring is located at the junction of the insulators at both ends, and the lower flange The structural parts and the lower fiber storage box are located at the bottom of the insulator, and the high-speed modulation and demodulation unit is located at the secondary side. The invention is suitable for direct current measurement of high-voltage direct current, especially UHV flexible direct-current polarity busbar, and improves the performance of the control and protection system.

Description

technical field [0001] The invention belongs to the technical field of electrical measurement, and relates to a current measuring device for a high-voltage direct current transmission line, in particular to a direct current measuring device for a polar bus of a high-voltage flexible direct current transmission. Background technique [0002] High-voltage direct current transmission, especially high-voltage flexible direct current transmission technology is an important means to form the backbone grid of the energy Internet and clean energy grid-connected interconnection in the future. It has the characteristics of high wave content and large current fluctuation. The control and protection system needs to quickly implement control strategies and protection actions based on the current measurement results on the high-voltage polar bus. The faster and more accurately the current measurement device can measure the current on the bus, the more beneficial it is for the stability an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00
CPCG01R19/0092
Inventor 刘海锋张超孟祥强李秦叶艳军秦红霞
Owner BEIJING SIFANG JIBAO AUTOMATION
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