Multi-region detection system for partial discharge decomposition components of insulating gas and method thereof

A technology of insulating gas and partial discharge, which is applied to the parts of electrical measuring instruments, measuring equipment, measuring devices, etc. Insulation GIS state detection and fault diagnosis provide scientific theoretical basis and other issues

Active Publication Date: 2012-07-25
CHONGQING UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantages of this patent are: 1) the structure of the cylinder body is complicated, and the phenomenon of partial discharge can only be observed through the quartz window, which is very inconvenient; It can collect the discharge decomposition components of the main gas chamber, so the detection system can only detect the decomposition components of the main gas chamber in general, and cannot detect the decomposition components of the insulating gas in different regions; 3) the detection system The gas chromatograph is only for CO2 , SOF2, SO2 in the decomposition components of SF6 gas under partial discharge F2, CF4 have been calibrated and can only measure the concentration of these four gases in the decomposition components, which cannot reflect the type of insulation defect and The relationship between the types and contents of the decompos

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  • Multi-region detection system for partial discharge decomposition components of insulating gas and method thereof
  • Multi-region detection system for partial discharge decomposition components of insulating gas and method thereof
  • Multi-region detection system for partial discharge decomposition components of insulating gas and method thereof

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Embodiment 1

[0051] Such as Figure 1~2 As shown, a multi-area detection system for partial discharge decomposition components of insulating gas mainly includes a voltage regulator 1, an isolation transformer 2, a non-corona test transformer 3, a non-partial discharge protection resistor 4, a capacitor voltage divider 5, and an insulating gas discharge Decomposition device 6, ultra-high frequency antenna 7, non-inductive detection impedance 8, coupling capacitor 9, high-speed digital storage oscilloscope 10, etc. Wherein: the insulating gas discharge decomposition device 6 is mainly composed of an oval pressure equalizing cap 11, a high-voltage conductive rod 12, a polytetrafluoroethylene insulating sleeve 13, a polytetrafluoroethylene insulating sleeve 14, an upper cover plate 15, and an upper fixing plate 16 , screw nut 17, needle electrode 18, plate electrode 19, housing 20, low-voltage conductive rod 21, lower fixing plate 22, first gas collection needle valve 23, first gas collection ...

Embodiment 2

[0062] A multi-area detection system for partial discharge decomposition components of insulating gas, the same as in Embodiment 1, wherein: the outer diameter of the cylindrical shell 20 is 280mm, the thickness is 20mm, and the height is 280mm, and the outer diameter of the upper fixing plate 16 is The diameter is 420mm, the thickness is 25mm, 6 screw holes are evenly arranged on the circumference of the upper fixing plate 16, the thickness of the upper cover plate 15 is 25mm, and the outer diameter matches the outer diameter of the upper fixing plate 16, The aperture of the through hole is set at the center of circle of the upper cover plate 15 to be 20mm, and the through hole on the corresponding upper cover plate 15 of the first air intake pipe 24 is 65mm away from the center of the upper plate 15, and the lower fixing The outer diameter of the plate 15 is 420 mm and the thickness is 45 mm. The aperture of the through hole provided at the center of the lower fixed plate 22 ...

Embodiment 3

[0064]A multi-area detection system for partial discharge decomposition components of insulating gas, the same as in Embodiment 1, wherein: the outer diameter of the cylindrical shell 20 is 320mm, the thickness is 30mm, and the height is 320mm, and the outer surface of the upper fixing plate 16 The diameter is 480 mm and the thickness is 35 mm. There are 10 screw holes evenly arranged on the circumference of the upper fixing plate 16. The thickness of the upper cover plate 15 is 35 mm, and the outer diameter matches the outer diameter of the upper fixing plate 16. The aperture of the through hole is set at the center of circle of the upper cover plate 15 to be 30mm, and the through hole on the corresponding upper cover plate 15 of the first air intake pipe 24 is 75mm away from the center of the upper plate 15, and the lower fixing The outer diameter of the plate 15 is 480 mm and the thickness is 55 mm. The aperture of the through hole provided at the center of the lower fixed p...

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Abstract

The invention relates to a multi-region detection system for the partial discharge decomposition components of insulating gas and a method thereof, which belong to the technical field of on-line gas-insulated equipment insulation monitoring. The system comprises a voltage regulator, an isolation transformer, a corona-free test transformer, a partial discharge-free protective resistor, a capacitive divider, an insulating gas discharge decomposition device, an ultrahigh-frequency antenna, an oscillograph, a gas chromatograph-mass spectrometer and the like, and the insulating gas discharge decomposition device comprises a housing, insulating sleeves, connecting rods, electrodes, valves, a vacuum meter, a gas pressure meter, a vacuum pump, an SF6 gas bottle, a pure compressed air bottle and the like. The method utilizes the system to respectively detect the discharge decomposition components of multiple regions in the insulating gas discharge decomposition device. The invention can accurately detect the components and component contents of the decomposed gas of a main gas chamber, a glow discharge region and an electron drift region and provide a standard. The invention can be widely applied to the on-line monitoring of gas-insulated equipment insulation, in particular to the on-line monitoring of GIS (gas-insulated switchgear) insulation.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of the insulation state of gas-insulated electrical equipment, and in particular relates to a detection system and an experimental method for partial discharge decomposition components of multi-region insulating gas. Background technique [0002] Gas-insulated combined electrical appliances (GIS) have the advantages of high dielectric strength, safe and stable operation, environmental protection, long maintenance cycle, small footprint and small maintenance workload, etc., and are widely used in the construction and renovation of large and medium-sized cities. However, judging from the operation situation in recent years, there have been many problems in the operation of GIS at home and abroad, mainly due to the failure caused by the inevitable internal defects. Once a failure occurs, the closed structure of GIS makes the diagnosis and maintenance of the failure difficult. The implement...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R1/02
Inventor 张晓星唐炬李松辽周君杰刘锦平
Owner CHONGQING UNIV
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