An Improved MLPG Method and Application in the Calculation of Electro-Thermal Field of Transmission Line
Keywords:
Ampacity, bundled conductors, electro-thermal coupling, meshfree method, the local Petrov-Galerkin method, UHVDCAbstract
An improved local Petrov-Galerkin method (MLPG) is proposed to solve the general electro-thermal problems in the paper, in which the method to determine the support domain is improved. Two electro-thermal problems are analyzed and solved with the method in the paper, the results indicate that the precision of the final solution is increased. In addition, the electrothermal field and ampacity of ±800kV ultra high voltage direct current (UHVDC) transmission line are calculated, great accuracy of the solution to the electro-thermal coupling problem is obtained. Results indicate that the maximum and minimum value of surface electric field intensity on each subconductor lies on the inner and outer surface, the ampacity of transmission line varies almost linearly with environment temperature inversely.
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