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SF6 local discharge decomposing device with micro-water injector and experiment method

A partial discharge and micro-moisture technology, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., to achieve the effect of facilitating promotion, improving detection accuracy, and improving detection accuracy

Active Publication Date: 2014-11-05
CHONGQING UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is for the existing SF 6 Insufficiency of partial discharge decomposition gas component analysis system and experimental method, providing a SF with trace moisture injector 6 The partial discharge decomposition device and experimental method can accurately add the required trace moisture to the airtight cylinder in the experiment, and can detect SF with different trace moisture contents under the same intensity partial discharge 6 The decomposed components of the gas have the characteristics of good air tightness, high precision and easy operation.

Method used

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  • SF6 local discharge decomposing device with micro-water injector and experiment method
  • SF6 local discharge decomposing device with micro-water injector and experiment method
  • SF6 local discharge decomposing device with micro-water injector and experiment method

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 2 , 3 Shown, a SF with trace moisture injector 6 Partial discharge decomposition device, mainly including voltage regulator console 1, isolation transformer 2, non-corona test transformer 3, non-PD protection resistor 4, capacitor voltage divider 5, SF 6 Partial discharge decomposition device 6, non-inductive detection impedance 7, matching impedance 8, oscilloscope 9, gas chromatograph 10, trace moisture injector 26, etc. It is characterized in that the trace water injector 26 is mainly composed of a trace water sampling needle 36 , a stainless steel thin tube 37 , a three-way valve 31 , a quartz glass test tube 34 and a sampling head 29 . The trace moisture injector 26 is connected to the SF via a trace moisture injector ball valve 25 6 SF of Partial Discharge Decomposition Device 6 6 The gas discharge breaks down the components on the main gas line at the inlet portion of the sampling valve 22 .

[0038] The micro-water injection needle is a comm...

Embodiment 2

[0043] A SF with trace moisture injector 6The partial discharge decomposition device is the same as in Example 1. Wherein said micro-water sampling needle 36 is a syringe with a scaled capacity of 200 μl; the stainless steel thin tube 37 on the needle of said micro-water sampling needle 36 has a length of 115 mm, an inner diameter of 0.6 mm, and a wall thickness of 0.4 mm. mm; the length of the pipe at the upper and lower ends of the three-way valve is 100mm, the length of the side end pipe is 65mm, the internal diameter of the three-end pipe is 12mm, and the wall thickness is 8mm; the upper end cylinder of the described sampling head 29 The length of the shaped tube is 12mm, the internal diameter is 2mm, and the wall thickness is 1.5mm. The length of the cylindrical tube in the middle section of the sampling head 29 is 6mm, the internal diameter is 2mm, and the wall thickness is 6mm. The cylindrical tube at the lower end of the sampling head 29 The length of the test tube is...

Embodiment 3

[0045] A SF with trace moisture injector 6 The partial discharge decomposition device is the same as in Example 1. Wherein said micro-water sampling needle 36 is a syringe with a scaled capacity of 250 μl; the stainless steel thin tube 37 on the needle of said micro-water sampling needle 36 has a length of 120 mm, an inner diameter of 0.7 mm, and a wall thickness of 0.3 mm. mm; the length of the pipe at the upper and lower ends of the three-way valve is 90mm, the length of the side end pipe is 60mm, and the inner diameter of the three-way pipe is 15mm, and the wall thickness is 6mm; the upper end cylinder of the described sampling head 29 The length of the shaped tube is 14mm, the internal diameter is 4mm, and the wall thickness is 1mm. The length of the cylindrical tube in the middle section of the sampling head 29 is 7mm, the internal diameter is 4mm, and the wall thickness is 5mm. The cylindrical tube at the lower end of the sampling head 29 The length is 14mm, the inner d...

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Abstract

The invention relates to a SF6 local discharge decomposing device with a micro-water injector and an experiment method, in particular to a structure of the micro-water injector in an SF6 insulating gas local discharge decomposing device and the experiment method. The micro-water injector provided by the invention is mainly composed of a micro-sample needle, a stainless steel thin tube, a three-way valve, a quartz glass test tube and a sampling head. According to the method provided by the invention, the device provided by the invention is utilized to detect SF6 gas decomposed components containing different quantities of micro-water under the condition of same local discharge strength. The method provided by the invention has the characteristics of capability of accurately controlling the water content of the SF6 gas, excellent experiment reliability, high detection precision, high air tightness , simple structure, low cost , convenience for operation and popularization, and the like; the method provided by the invention is widely applied to the control on the micro-water content of the SF6 gas and the monitoring for the discharge decomposed components in the SF6 local discharge decomposing device; and a reliable experiment platform is supplied to the on-line monitoring for the water influence of the SF6 electric equipment.

Description

technical field [0001] The present invention belongs to sulfur hexafluoride (SF 6 ) The technical field of on-line monitoring of the insulation state of gas-insulated electrical equipment, specifically related to SF 6 The structure and experimental method of the trace moisture injector in the partial discharge decomposition device of insulating gas. Background technique [0002] SF 6 Gas insulated electrical equipment (referred to as SF 6 Electrical equipment) has the advantages of small footprint, safe and reliable operation, less maintenance workload, long maintenance cycle, etc., and has been widely used in power systems. However, SF 6 Inevitable insulation defects inside electrical equipment will gradually expand and cause failures. Once a fault occurs, due to its fully enclosed combined structure, it is very difficult to perform fault location and maintenance work. SF 6 Electrical equipment often produces partial discharge before fault breakdown, and under the ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12G01R31/20G01N30/00
Inventor 唐炬姚强潘建宇张晓星何建军侯兴哲曾福平
Owner CHONGQING UNIV
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