Method and device for detecting overheat faults of GIS (Gas Insulated Switchgear) busbar joints

A technology for bus joints and detection methods, which is applied to measuring devices, measuring electricity, and measuring electrical variables, etc., can solve problems such as the inability to effectively detect overheating faults of GIS bus joints, and achieve the effect of ensuring safety and stable operation

Active Publication Date: 2012-11-14
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID +1
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Problems solved by technology

[0004] Based on this, it is necessary to provide a method and device for detecting overheating faults of GIS bus joints in order to solve the above-mentioned problem of being unable to effectively detect overheating faults of GIS bus joints

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  • Method and device for detecting overheat faults of GIS (Gas Insulated Switchgear) busbar joints
  • Method and device for detecting overheat faults of GIS (Gas Insulated Switchgear) busbar joints

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Embodiment Construction

[0017] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] see figure 1 As shown, a detection method for overheating faults of GIS bus joints includes the following steps:

[0019] In step S101 , a functional relationship is established according to the relationship among the shell temperature value, contact resistance value, load current value and ambient temperature value of the GIS bus joint under typical poor contact conditions.

[0020] During the overheating fault process of GIS bus joints, the shell temperature of GIS bus joints is affected by contact resistance, load current and ambient temperature. For this reason, in the present invention, in conjunction with the heat transfer characteristics of the GIS busbar joint under typical poor contact conditions, the shell temperature of the GIS busbar joint under the comprehensive action of contact resistance, load ...

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Abstract

The invention provides a method and device for detecting the overheat faults of GIS (Gas Insulated Switchgear) busbar joints. The method comprises the following steps of: establishing a function equation according to a relation among the shell temperature value, contact resistance value, load current value and environmental temperature value of a GIS busbar joint under typical bad contact conditions; carrying out regular polling according to a preset temperature polling cycle, measuring the shell temperature value, load current value and environmental temperature value of the GIS busbar joint in the current cycle, and according to the function equation, calculating the polling contact resistance value of the GIS busbar joint; and comparing the polling contact resistance value with a contact resistance value of the GIS busbar joint under normal contact conditions so as to judge whether a fault occurs. According to the method and device for detecting the overheat faults of GIS busbar joints, provided by the invention, a situation whether a fault occurs is judged according to the contact resistance, so that the overheat faults of GIS busbar joints can be detected more effectively, and an effect of ensuring the safe and stable operation of a power system can be facilitated.

Description

technical field [0001] The invention relates to the field of fault detection of electrical equipment, in particular to a detection method for overheating faults of GIS bus joints and a detection device for overheating faults of GIS bus joints. Background technique [0002] With the massive use of GIS (Gas Insulated Switchgear, gas insulated switchgear), accidents caused by overheating of GIS bus joints due to poor contact have occurred from time to time, which has become one of the typical faults of GIS equipment. From the overheating fault mechanism of GIS bus joints, it can be seen that it is a long-term process for GIS bus joints to heat up due to poor contact until an accident occurs. Therefore, by carrying out online monitoring or inspection of the temperature of GIS bus joints, overheating faults can be found in time and countermeasures can be taken to prevent them Accidents are of great significance to the safe and stable operation of power systems. [0003] At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R27/02
Inventor 林峻陈勉谢志杨舒乃秋金向朝麦洪李洪涛李莉李玲吴晓文关向雨李红玲
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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