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Calculation method and apparatus for temperature of high-voltage switch contact covered with insulation layer

A technology of high-voltage switch and calculation method, which is applied in the application and calculation of thermometers and thermometers, and can solve the problem of inability to directly measure the temperature of switch contacts.

Active Publication Date: 2017-05-10
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for calculating the temperature of a high-voltage switch contact covered with an insulating layer, by establishing a second insulating layer temperature distribution function formula with a correction coefficient, and obtaining the circuit breaker chamber of the switch cabinet measured by the temperature sensor The real-time temperature and preset parameters calculate the temperature of the solid insulated switchgear contact, which solves the problem that the existing switchgear solid insulated switchgear contact temperature detection technology cannot directly measure the switch inside the solid insulated switchgear tightly wrapped by the insulating layer Contact Temperature Technical Questions

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  • Calculation method and apparatus for temperature of high-voltage switch contact covered with insulation layer
  • Calculation method and apparatus for temperature of high-voltage switch contact covered with insulation layer
  • Calculation method and apparatus for temperature of high-voltage switch contact covered with insulation layer

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no. 2 example

[0062] see figure 2 , an embodiment of the present invention provides a second embodiment of a method for calculating the temperature of a high-voltage switch contact covered with an insulating layer, including:

[0063] 201, according to the preset one-dimensional heat conduction differential equation of the insulating layer with internal heat source and boundary conditions Establish the temperature distribution function formula of the first insulating layer where θ is the temperature at any x in the insulating layer, θ f is the real-time temperature of the circuit breaker room of the switchgear, is the heat generation rate of the heat source in the insulating layer, λ is the thermal conductivity coefficient of the insulating layer, h is the comprehensive heat dissipation coefficient of heat radiation and convective heat transfer between air and the surface of the insulating layer, and δ is the thickness of the insulating layer;

[0064]In this embodiment, firstly, a...

no. 1 example

[0081] see image 3 , the embodiment of the present invention provides a first embodiment of a high-voltage switch contact temperature calculation device covered with an insulating layer, including:

[0082] The first formula establishing unit 301 is used to set up a one-dimensional heat conduction differential equation of an insulating layer with an internal heat source according to a preset and boundary conditions Establish the temperature distribution function formula of the first insulating layer where θ is the temperature at any x in the insulating layer, θ f is the real-time temperature of the circuit breaker room of the switchgear, is the heat generation rate of the heat source in the insulating layer, λ is the thermal conductivity coefficient of the insulating layer, h is the comprehensive heat dissipation coefficient of heat radiation and convective heat transfer between air and the surface of the insulating layer, and δ is the thickness of the insulating layer;...

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Abstract

The embodiment of the invention discloses a calculation method and apparatus for temperature of a high-voltage switch contact covered with an insulation layer. A second insulation layer temperature distribution function formula with a correction factor introduced is built; real-time temperature of a switch cabinet breaker and measured by a temperature sensor is acquired; and the temperature of a solid insulation switch cabinet contact is calculated according to the real-time temperature of the switch cabinet breaker and preset parameters. The calculation method and apparatus solve a technical problem that the temperature of a switch contact in the solid insulation switch cabinet tightly covered with the insulation layer cannot be directly measured via the preset switch cabinet solid insulation switch cabinet contact temperature detection technology.

Description

technical field [0001] The invention relates to the technical field of electrical equipment monitoring, in particular to a method and device for calculating the temperature of a high-voltage switch contact covered with an insulating layer. Background technique [0002] High-voltage switchgear solid insulation switchgear contact temperature detection has always been the focus of research in this field. The high-voltage solid insulation ring network cabinet is tightly sealed and compact in structure. The periphery of the switch solid insulation switchgear contact is covered with an insulating layer. Under high voltage and high current, the long-term operation of solid insulated switchgear contacts will cause temperature rise due to material aging and poor contact. Equipment failure caused by overheating of solid insulated switchgear contacts has become an increasingly prominent problem. Therefore, it is of great engineering application value to detect the contact temperature o...

Claims

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Application Information

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IPC IPC(8): G06F17/50G01K13/00
CPCG01K13/00G06F30/20Y02E60/00
Inventor 周文文聂一雄徐卫东
Owner GUANGDONG UNIV OF TECH
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