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Fault diagnosis method and system of sulfur hexafluoride electrical equipment

A fault diagnosis system and technology of electrical equipment, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as inability to determine equipment faults, inability to clarify the operating status of electrical equipment, inability to know faults, etc.

Inactive Publication Date: 2015-01-21
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is impossible to determine the operating status of electrical equipment based on the measurement results, and it is impossible to determine what kind of faults exist in the equipment and what severity they are in, and it is impossible to know the relevant information of the faults.

Method used

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  • Fault diagnosis method and system of sulfur hexafluoride electrical equipment
  • Fault diagnosis method and system of sulfur hexafluoride electrical equipment
  • Fault diagnosis method and system of sulfur hexafluoride electrical equipment

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0036] like Figure 1 to Figure 6 As shown, this embodiment is aimed at measuring H 2 S, SO 2 , HF, , SOF 2 , SO 2 f 2 , CO, CO 2 and other gas components to judge the fault status of operating equipment, and provide a method for internal fault diagnosis of sulfur hexafluoride electrical equipment.

[0037] Fault state definitions for operating equipment:

[0038] Note: From the analysis results of the nature and content of sulfur hexafluoride gas impurities, it is speculated that sulfur hexafluoride gas or insulating materials are decomposed, and when it is suspected that sulfur hexafluoride electrical equipment is abnormal.

[0039] Abnormal: From the analysis results of the nature and content of sulfur hexafluoride gas impurities, it is obvious that there is an abnormality inside the sulfur hexafluoride electrical equipment.

[0040] Realize the technical scheme concrete steps of the present invention as follows:

[0041] A method for diagnosing internal faults of s...

Embodiment 2

[0062] The difference between this embodiment and embodiment 1 is only:

[0063] Sulfur hexafluoride gas analysis technology can be effectively used for fault analysis, and has the advantages of fast, simple, no power outage, and no need to change electrical equipment. The following uses sulfur hexafluoride gas analysis technology to troubleshoot sulfur hexafluoride electrical equipment Examples of judgments are analyzed:

[0064] The specific process is as follows:

[0065] Preparation stage: The 220kV GIS bus differential protection of a substation operates, and faults occur at intervals, but the specific location and cause of the fault are unknown at that time. In the further analysis, the fault was first located using the detection tube technology, and then the gas from the normal operating equipment and the faulty equipment was collected with a steel cylinder and brought back to the laboratory for analysis.

[0066] Fault location stage: Use the detection tube to locate...

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Abstract

The invention discloses a fault diagnosis method of sulfur hexafluoride electrical equipment. The method comprises the steps that the content of foreign gas in the electrical equipment is firstly obtained, and whether the equipment is in a noticed state or an abnormal state is judged through the content of HF in the gas and the content of fluorinion in the gas; meanwhile, whether high-temperature overheating faults exist in the equipment or not is judged through the content of sulfur dioxide. Whether the electrical equipment is normal or abnormal or out of order is judged by measuring the content of the HF, the content of the SO2, the content of SOF2, the content of SO2F2, the content of CO and the content of CO2 in the foreign gas in the sulfur hexafluoride electrical equipment. The fault types of arc discharging, low-energy discharging and high-temperature overheating occurring in the equipment can be judged according to whether increase tendency exits in the content of the CO and the content of the CO2 or not through the parameters of the content of the SO2 and the ratio of SOF2 / SO2F2, bases can be provided for safe and reliable running of the sulfur hexafluoride electrical equipment, and effective reference can be provided for operation and maintenance personnel for equipment maintenance.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of power systems, in particular to a method and system for identifying and diagnosing faults of sulfur hexafluoride electrical equipment. Background technique [0002] Sulfur hexafluoride gas has stable physical and chemical properties. It is not easy to decompose under the normal operation of electrical equipment (no discharge or overheating), and correspondingly no decomposition products such as sulfide and fluoride will be produced. Arc discharge, spark discharge, corona discharge, and overheating all promote the decomposition of sulfur hexafluoride gas to produce sulfides and fluorides. Arc discharge is mainly caused by short-circuit faults in equipment. Spark discharge is a capacitive discharge in a very short time between air gaps. The decomposition products produced by low energy are significantly different from those of arc discharge. SF 6 Another form of electrical discharge ...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 李龙伏进姚强苗玉龙邱妮
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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