Corridor pipe GIL (Gas Insulated Line) three-dimensional temperature field and expansion and shrinkage deformation calculation method based on workbench

Abstract

The invention discloses a corridor pipe GIL (Gas Insulated Line) three-dimensional temperature field and expansion and shrinkage deformation calculation method based on a workbench. According to the structural characteristics of corridor pipe GIL arrangement, an electrical heat multi-physics coupling calculation model under an integral GIL environment is established in the workbench, a GIL three-dimensional temperature field is obtained through calculation according to a corresponding operation working condition, and a finite element method is used for obtaining corresponding GIL expansion andshrinkage deformation data in the workbench. The calculation method can provide a basic reference for the selection and the screening of corridor pipe GIL elements, based on the operation basic parameters, the theoretical data of the temperature and the expansion and shrinkage deformation in a GIL operation process is calculated, and a technical support is provided for system operation state evaluation. According to the method, the temperature field of a gas insulation electric transmission line can be accurately calculated, in addition, applied load and boundary conditions can be changed forcarrying out simulation calculation on the gas insulation electric transmission line temperature field under various different operation conditions, meanwhile, the thermal deformation of the GIL pipeline can be calculated, and the method has a reference meaning for the structure design and operation condition of the gas insulation electric transmission line.

Description

technical field [0001] The invention relates to the technical field of UHV gas-insulated power transmission, in particular to a workbench-based three-dimensional temperature field and expansion-contraction deformation calculation method of a GIL. Background technique [0002] Gas insulated transmission line (GIL) has the advantages of high voltage level, large transmission capacity, low power loss, and small electromagnetic interference, and has great advantages in areas where traditional overhead lines are restricted, such as crossing straits, rivers and seas, etc. Therefore GIL will be widely used. [0003] During operation, due to Joule heat loss, the transmission line is always in a state of heating, resulting in an increase in line temperature. The temperature rise not only reduces the maximum current-carrying capacity of the line, but also affects the insulation performance of the internal non-conductive material when the temperature exceeds a certain limit, reduces t...

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Problems solved by technology

Moreover, the above two finite element methods cannot consider the temperature distribution of the GIL pipeline under the condition of wind speed

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