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Temperature measuring method for busbar joints of gas insulated switchgear

A technology for gas insulated switches and bus joints, which is applied to thermometers, thermometers, and parts of thermometers that undergo physical/chemical changes. The effect of high safety and feasibility

Active Publication Date: 2014-07-23
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of fiber grating temperature detection also judges whether the joint is overheated by detecting the temperature change of the busbar shell surface. This method can realize online detection, but it cannot accurately detect the temperature of the busbar joint

Method used

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  • Temperature measuring method for busbar joints of gas insulated switchgear
  • Temperature measuring method for busbar joints of gas insulated switchgear

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Embodiment Construction

[0013] In order to further illustrate the technical means adopted by the present invention and the achieved effects, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and preferred embodiments.

[0014] see figure 1 , is a schematic flow chart of the method for detecting the temperature of the gas-insulated switchgear bus joint of the present invention. The temperature detection method of the gas insulated switchgear bus joint of the present invention comprises the following steps:

[0015] Step 1 of S101, through the temperature field distribution of the gas-insulated switchgear busbar, determine the most sensitive point of temperature rise corresponding to the surface of the gas-insulated switchgear busbar shell and the three-phase busbar joint;

[0016] As one of the embodiments, the finite element numerical calculation method is used to determine the most sensitive point of tempera...

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Abstract

The invention discloses a temperature measuring method for busbar joints of gas insulated switchgear. The temperature measuring method includes determining the most-sensitive temperature-rise points on the surface of a shell of a busbar of the gas insulated switchgear corresponding to three-phase busbar joints, acquiring load current of the busbar of the gas insulated switchgear, environment temperature and three-phase temperature of the most-sensitive temperature-rise points; finding out the corresponding relation among the temperature of the joints of the busbar of the gas insulated switchgear, the load current of the busbar of the gas insulated switchgear, the environment temperature and the three-phase temperature of the most-sensitive temperature-rise points; and measuring temperature of the three-phase busbar joints according to the corresponding relation and the three-phase temperature of the most-sensitive temperature-rise points. By the temperature measuring method, the temperature of the busbar joints of the gas insulated switchgear can be measured on line accurately, power interruption is avoided, measuring results cannot be affected by external environmental factors, no structural modification is required for the gas insulated switchgear, and high safety and feasibility are achieved. Besides, by the temperature measuring method, all the busbar joints of a transformer substation can be measured simultaneously, and automatic measurement can be realized conveniently.

Description

technical field [0001] The invention relates to the technical field of temperature detection of busbar joints of electrical equipment, in particular to a temperature detection method of busbar joints of gas insulated switchgear. Background technique [0002] Gas insulated switchgear has the advantages of small footprint, high reliability, less maintenance and long service life in terms of structural performance. It has been widely used in power transmission and distribution systems at home and abroad. However, faults such as overheating or even burning of the busbar due to excessive contact resistance of the joints of the gas insulated switchgear have seriously affected the reliability and stability of the grid power supply. [0003] Aiming at the problem of failure caused by overheating of the gas-insulated switchgear busbar joints, the general measurement methods currently mainly used include regular measurement of loop resistance, partial discharge detection, regular infr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/00G01K1/20
Inventor 舒乃秋李红玲李洪涛吴晓文李玲关向雨谢志杨金向朝陈道品刘根才李莉梁家盛
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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