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Structure-variable gas insulation composite apparatus partial discharge experiment device and method thereof

A technology of gas insulation combination and partial discharge, which is applied in the direction of testing dielectric strength, etc., can solve the problems of multi-signal interaction and other problems, and achieve the effect of real and accurate experiments and a wide range of experiments

Inactive Publication Date: 2009-08-19
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This device can simulate the structures of "T", "L" and "one" shapes in GIS; this method can be used to solve the problems of PD signal propagation characteristics, multi-signal interaction and UHF signal discharge calibration, etc. The experimental research has the characteristics of flexible experiment, realism and accuracy

Method used

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  • Structure-variable gas insulation composite apparatus partial discharge experiment device and method thereof
  • Structure-variable gas insulation composite apparatus partial discharge experiment device and method thereof
  • Structure-variable gas insulation composite apparatus partial discharge experiment device and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 3-7 As shown, a variable-structure partial discharge experimental device for gas-insulated combined electrical appliances includes: induction voltage regulator 1, non-halo experimental transformer 2, non-partial discharge protection resistor 3, standard capacitor voltage divider 4, GIS analog components 27, Built-in ring UHF sensor 6, microstrip line filter amplifier 8, UHF intelligent multi-way switch 9, digital storage oscilloscope 10, microcomputer 11 and signal generator 28, etc. It is characterized in that: the GIS simulation element 27 is a "T"-shaped structure, which is used to simulate the "T"-shaped connection part in the GIS equipment. The GIS analog element 27 of "T" shape structure is composed of copper terminal 13, end cover 14, built-in ring UHF sensor 6, supporting insulator 23, high voltage electrode 17, grounding shell 18, vacuum pressure gauge and intake valve 21 , Screw rod and nut 12 are formed. One end of the "T" high-voltage elect...

Embodiment 2

[0041] A variable structure gas-insulated composite electric partial discharge experimental device, same as embodiment 1. It is characterized in that: the GIS simulation element 27 is an "L"-shaped structure, which is used to simulate the "L"-shaped connection part of the GIS equipment 27. The free metal particle defect model is placed on the left section of the "L" shaped structure of the GIS simulation element 27, and the free metal particle defect model is placed on the inner surface of the grounding shell 18 of the left section of the "L" shaped structure of the GIS simulation element 27. slice to simulate. The remaining built-in ring UHF sensor 6 is connected to the microstrip filter amplifier 8 through a low-loss cable 26 .

Embodiment 3

[0043] A variable structure gas-insulated composite electric partial discharge experimental device, same as embodiment 1. It is characterized in that: the GIS simulation element 27 is a "one" shape structure, which is used to simulate the "one" shape connection part in the GIS equipment. Place the fixed metal particle defect model on the surface of the insulator on the left section of the "one"-shaped structure of the GIS simulation element 27, and the fixed metal particle defect model on the insulator surface is pasted on the surface of the supporting insulator 23 on the left section of the "one"-shaped structure of the GIS simulation element 27 Rectangular tinfoil to simulate. The remaining built-in ring UHF sensor 6 is connected to the microstrip filter amplifier 8 through a low-loss cable 26 .

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Abstract

The invention discloses a partial discharging experiment device of a structure-variable combined electrical gas-insulated apparatus and a method thereof, and belongs to the technical field of insulation online detection of electrical equipment. The partial discharging experiment device mainly comprises a GIS simulating element, a digital storage oscillograph and a signal generator, etc. By utilizing the device, the partial discharging experiment method carries out a pressurized experiment so as to collect ultrahigh frequency PD signals, carries out a signal injecting experiment, collects and corrects the ultrahigh frequency PD signals through programs, thus obtaining real waveform of the ultrahigh frequency PD signals. The device can simulate the T-shaped, L-shaped and bar-shaped structures of real GIS equipment. The method can carry out the experiment to the T-shaped, L-shaped or bar-shaped GIS structures by one to four insulated defect models, and the experiment is real, accurate and wide in range. The device and the method can be widely applied to the experimental research of the insulated state online monitoring of GIS equipments in teaching practices, scientific research institutions and equipment manufacturing plants, and the detected PD signals can be used for theoretical analysis and applied research.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of electrical equipment insulation, and in particular relates to an experimental device and an experimental method for on-line monitoring of the insulation of gas-insulated combined electric appliances. Background technique [0002] Gas-insulated switchgear (GIS) has the advantages of high dielectric strength, stable operation, small footprint and small maintenance workload, and has been more and more widely used in the construction and transformation of large and medium-sized city power grids. However, according to the operation practice in the past ten years, among the many faults in the operation of GIS at home and abroad, insulation faults are the main ones. The insulation fault is mainly caused by partial discharge (PD) caused by various long-term defects in GIS, which leads to SF. 6 It is caused by the decrease of gas insulation performance. Due to the high equivalent frequency ...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 唐炬谢颜斌张晓星姚陈果杜林陈伟根孙才新王有元李剑
Owner CHONGQING UNIV
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