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GIS transient state shell voltage on-line monitoring system based on optical voltage sensor

An optical voltage and monitoring system technology, applied in voltage/current isolation, instruments, measuring devices, etc., can solve problems such as inability to realize online monitoring, electromagnetic environment interference, etc., and achieve strong anti-electromagnetic interference ability, high reliability, and safety Good results

Inactive Publication Date: 2021-08-10
TAIAN POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO +6
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the existing TEV monitoring method is easily interfered by the harsh electromagnetic environment of the GIS site and cannot realize online monitoring, the present invention provides a GIS transient shell voltage online monitoring system based on an optical voltage sensor

Method used

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  • GIS transient state shell voltage on-line monitoring system based on optical voltage sensor
  • GIS transient state shell voltage on-line monitoring system based on optical voltage sensor
  • GIS transient state shell voltage on-line monitoring system based on optical voltage sensor

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specific Embodiment approach 1

[0025] Specific implementation mode 1. Combination Figure 1 to Figure 3 As shown, the present invention provides a GIS transient housing voltage online monitoring system based on an optical voltage sensor, including an optical voltage sensor 1, an LED light source 2, a photodetector 3 and a signal processing circuit 4,

[0026] The high-voltage electrode of the optical voltage sensor 1 is connected to the voltage monitoring terminal of the GIS equipment shell 6 through a wire, and the ground electrode of the optical voltage sensor 1 is connected to the GIS substation grounding grid through a ground wire; the optical voltage sensor 1 senses the GIS equipment shell based on the Pockels electro-optic effect the case voltage;

[0027] The carrier optical signal of the LED light source 2 is input to the optical voltage sensor 1 through the optical fiber cable, and the optical voltage sensor 1 performs electro-optic modulation on the housing voltage to obtain a modulated optical si...

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Abstract

The invention discloses a GIS transient shell voltage on-line monitoring system based on an optical voltage sensor, and belongs to the field of GIS transient overvoltage monitoring. The invention aims to solve the problem that an existing TEV monitoring method is easily interfered by a severe electromagnetic environment on a GIS site and cannot realize online monitoring. A high-voltage electrode of an optical voltage sensor is connected with a voltage monitoring terminal of a GIS equipment shell, and a ground electrode of the optical voltage sensor is connected with a GIS substation grounding grid; the optical voltage sensor senses the shell voltage of the GIS equipment shell based on the Pockels electro-optical effect; carrier wave optical signals of the LED light source are input into the optical voltage sensor through the optical fiber cable, the optical voltage sensor conducts bubble effect electro-optical modulation on shell voltage to obtain modulated optical signals, the modulated optical signals are transmitted to the photoelectric detector through the optical fiber cable to be subjected to photoelectric conversion, the converted electric signals are demodulated through the signal processing circuit, and a monitoring result of the shell voltage is obtained. The GIS transient shell voltage online monitoring device is used for GIS transient shell voltage online monitoring.

Description

technical field [0001] The invention relates to a GIS transient shell voltage online monitoring system based on an optical voltage sensor, and belongs to the field of GIS transient overvoltage monitoring. Background technique [0002] Theoretically, the equipment shell of gas insulated switchgear (GIS) is connected to the ground grid, and the potential of the shell should be the same as the earth, which is the ground potential. However, under the operation of the isolation switch, the internal bus bar of the GIS equipment will generate a large transient voltage and current; due to the electromagnetic coupling between the GIS equipment shell and the internal bus bar, an induced voltage will appear on the GIS equipment shell. This phenomenon is called transient ground potential rise (abbreviated as TGPR, Transient Ground Potential Rise), and the corresponding enclosure voltage is called transient enclosure voltage (abbreviated as TEV, Transient Enclosure Voltage). The TEV of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/24
CPCG01R15/242G01R15/247G01R15/248
Inventor 李其莹尹东于文斌高山张国庆马进军马延庆万斌郭志忠王贵忠秦松冉亮许玉伟韩增永丁申范少华李洪波侯英伟
Owner TAIAN POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO
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