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Device for detecting breakdown of sulfur hexafluoride gas-insulated electrical equipment

A technology of sulfur hexafluoride gas and electrical equipment, which is applied in the direction of measuring device, sampling device, measuring electricity, etc., can solve the problems of HF instability and interference, improve safety and reliability, and enhance reliability and accuracy. Effect

Inactive Publication Date: 2010-07-21
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because HF is unstable and vulnerable to other acid gases (such as SO 2 ) interference, its accurate detection is one of the difficulties in the detection of derivatives in sulfur hexafluoride gas-insulated equipment

Method used

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  • Device for detecting breakdown of sulfur hexafluoride gas-insulated electrical equipment
  • Device for detecting breakdown of sulfur hexafluoride gas-insulated electrical equipment
  • Device for detecting breakdown of sulfur hexafluoride gas-insulated electrical equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Analysis of SF under test conditions 6 decomposition gas

[0029] (1) Before the experiment, first sample an appropriate amount of gas to detect SF in electrical equipment of sulfur hexafluoride 6 For the purity of the gas and other gas impurities contained therein, the gas impurity content is set as a system value and input into the gas concentration increment comparison unit 27 in the analysis monitoring unit 19 .

[0030] (2) Build an experimental platform for partial discharge or other discharges and partial overheating, and conduct partial discharge tests. After the test is completed, the valve on the gas collector is opened, and the gas after the fault is collected by the gas collector.

[0031] (3) The interfering gas separator is attached to the electrochemical sensor, and the sampling gas enters the sampling gas chamber 16 through the air pump 15, and is filtered by the interfering gas separator and then sent to the electrochemical gas sensor, and ea...

Embodiment 2

[0036] Example 2: On-line monitoring of sulfur hexafluoride gas-insulated equipment

[0037] (1) System setting: first set the warning value and the original value of the gas impurity content, the setting basis can refer to the gas concentration detected by the specific equipment to be monitored according to the national standard during installation, operation or maintenance; determine the online monitoring Set the timer 31 for the gas sampling time interval.

[0038] (2) The embedded host 28 is connected to the valve of the gas sampler 14, and at regular intervals, the timer 31 will generate instructions to enable the embedded host 28 to start the valve of the gas sampler 14 for gas sampling.

[0039] (3) The gas sampling and processing process is the same as steps (3) and (4) in Example 1.

[0040] (4) An interface of the compensation and correction unit 26 is connected to the embedded host, and the processed detection value is directly input into the embedded host 28 .

...

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Abstract

The invention discloses a device for detecting the breakdown of sulfur hexafluoride gas-insulated electrical equipment. The device comprises multiple gas acquisition units. The gas acquisition units are connected with an A / D conversion module (11) wihch is connected with a monitoring and analysis system (12); after SF6 decomposition gas generated from the sulfur hexafluoride gas-insulated electrical equipment is respectively filtered and measured by the gas acquisition units, gas concentration analog signals are obtained, and the gas concentration analog signals are converted to digital signals by the A / D conversion module (11); after the digital signals and the temperature and humidity signals are processed, calculated and analyzed by the monitoring and analysis system (12), a quantitative contrast relationship between the components and concentration of the SF6 decomposition gas and the inner exceptions in the sulfur hexafluoride gas-insulated electrical equipment is obtained to judge the type and the severity of the breakdown and predict development trend of the breakdown; the device for detecting the breakdown is connected with an upper computer by an RS485 or RS232 interface (34) to realize remote communication.

Description

technical field [0001] The invention relates to a fault detection device for high-voltage electrical equipment, in particular to sulfur hexafluoride (SF 6 ) is a fault detection device for high-voltage electrical equipment with insulating gas. Background technique [0002] Power Systems, SF 6 Gas-insulated power equipment, such as transformers, transformers, GIS, etc., has the advantages of high dielectric strength and small footprint, and is gradually becoming the first choice for modern substation construction. According to decades of operation and failure statistics, the SF 6 In the electrical equipment with insulating gas, the proportion of insulation faults is the highest (over 60%), and partial discharge is the general manifestation and precursor of insulation faults. Normally, pure SF 6 The gas is a colorless, odorless, non-flammable, non-toxic inert gas with excellent insulation properties and will not age and deteriorate. However, SF 6 The gas will decompose u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01N1/24
Inventor 张国强韩冬牛文豪王新郭润睿
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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