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Calculating method for power-cable magnetic-thermal coupling field

A technology of power cables and calculation methods, applied in the field of power cables, can solve problems such as the inability to reflect the actual value of optical fiber distributed temperature measurement

Inactive Publication Date: 2015-12-23
BEIJING ELECTRIC POWER ECONOMIC RES INST +2
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Its application on cables, if it is only to monitor the temperature of the core and skin, cannot reflect the actual value of optical fiber distributed temperature measurement

Method used

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  • Calculating method for power-cable magnetic-thermal coupling field
  • Calculating method for power-cable magnetic-thermal coupling field
  • Calculating method for power-cable magnetic-thermal coupling field

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Embodiment Construction

[0057] The invention provides a calculation method for the magnetic-thermal coupling field of a power cable based on ANSYS, comprising: S1) establishing a physical simulation model of a power cable, and establishing a physical model of an electromagnetic field and a temperature field; S2) clarifying electromagnetic field calculation parameters and solution types; S3 ) into the electromagnetic field analysis file, and then specify the temperature field analysis data; S4) write into the temperature field analysis file and start the calculation; S5) if the calculation results converge, the magnetic field and thermal field of the cable can be calculated to realize the magnetic-thermal coupling analysis ; If the calculation result does not converge, rewrite the electromagnetic field and temperature field files, and iteratively analyze until convergence. This method can be used in the analysis of temperature rise and loss of power cables, and is very suitable for the analysis of magn...

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Abstract

The invention provides a calculating method for a power-cable magnetic-thermal coupling field. The method comprises the steps that 1, a power-cable electromagnetic field physical model and a power-cable temperature field physical model are built; 2, power-cable physical simulation models are built, and calculating parameters and boundary conditions are determined; 3, the corresponding calculating parameters are obtained by measuring a power cable; 4, an electromagnetic field and a temperature field of the power cable are solved according to the electromagnetic field physical simulation model and the temperature field physical simulation model; 5, if calculating results are convergent, the electromagnetic field and the temperature field of the power cable are obtained, magnetic-thermal coupling analysis is achieved, and if the calculating results are not convergent, iterative analysis is performed by returning to the step 4 until the calculating results are convergent. The calculating method is flexible in solving mode and very suitable for the magnetic-thermal coupling problems of processing cable loss and temperature rising.

Description

technical field [0001] The invention belongs to the field of power cables, and in particular relates to a calculation method for a magnetic-thermal coupling field of a power cable based on ANSYS. Background technique [0002] The power cable will inevitably produce loss during operation, which will cause heat generation and increase the temperature of the cable. Therefore, the heat dissipation of the cable should be considered in the laying of the cable to ensure that the cable will not cause accelerated insulation aging due to overtemperature during operation, and the cable life will be shortened. Even the cable is destroyed immediately. Moreover, the factors affecting the cable temperature field are complex and changeable, and the current carrying capacity of the cable is also difficult to accurately determine. [0003] In recent years, the maturity of optical fiber sensing temperature measurement technology has made it an important measurement method for online temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 卞斌王恩德仇天骄马学良张晓颖李志鹏王军宿文波吴凤英肖楚鹏邱泽晶陈小飞冯伦饶尧黄静
Owner BEIJING ELECTRIC POWER ECONOMIC RES INST
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