Computer simulation platform system for galloping of overhead transmission conductors

An overhead transmission wire, computer simulation technology, applied in the direction of calculation, electrical digital data processing, mechanical vibration damping device, etc., can solve problems such as no direct solution method

Inactive Publication Date: 2012-07-25
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Wire galloping is a strongly nonlinear fluid-solid coupling dynamics process, which is complex, specific, and irreproducible. Although there are many studies, there is no direct solution method. Therefore, computer simulation is the only feasible research method at present.

Method used

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  • Computer simulation platform system for galloping of overhead transmission conductors
  • Computer simulation platform system for galloping of overhead transmission conductors
  • Computer simulation platform system for galloping of overhead transmission conductors

Examples

Experimental program
Comparison scheme
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Embodiment

[0042] The invention includes 3 subsystems, namely

[0043] 1. Dynamic modeling subsystem: used to input the data parameters required for simulating wire galloping and establish the mechanical model of the system;

[0044] The dynamic modeling subsystem includes: working condition parameter input module, common parameter standard database module of transmission line system, finite element model module of transmission line system; each module is used for:

[0045] (1) The working condition parameter input module includes tower parameters, the tower parameters include geometric structure size, space altitude, material, and insulator form; wire parameters, the wire parameters include model, number of splits, split layout, and interphase spacer parameters; The icing parameters include the input of the structure type of the icing, the nature of the icing, and the size of the icing, and all the input variables are parameterized to adapt the system to different working conditions and differ...

specific Embodiment

[0074] The 30#--31# gears of a 330V line in the second split have been observed to show galloping phenomenon many times in actual operation. The stall is located in a highland position on a canyon hillside. The two poles of the line are located on hillsides with different altitudes on both sides. The height difference of the suspension points of the wires on both sides is about 39 meters. The actual observation that the icing of this span is "D" Type structure, the span is 200m, the altitude difference between the two tower insulators is 40m, the wire type is LGJ300 / 40, and the average running tension is 10000N.

[0075] Calculation results:

[0076] The average wind speed measured at this place is 15m / s. Considering the influence of topography and geomorphology, simulation software is used to calculate the spatial position of the wire midpoint. The wind speed is about 21m / s, and the angle between the wind direction and the horizontal plane is about 15 °. At the same time at d...

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Abstract

The invention relates to a computer simulation platform system for galloping of overhead transmission conductors, which comprises a transmission line system dynamic modeling subsystem, a fluid-solid coupling dynamic parameter simulation computing subsystem and a conductor galloping simulation subsystem. The dynamic modeling subsystem comprises a parameter input submodule, a general parameter database submodule, and a line system finite element submodule. The fluid-solid coupling dynamic parameter simulation computing subsystem comprises a terrain and meteorological parameter submodule, an aerodynamic parameter simulation submodule, a test parameter database submodule, and a working condition correction coefficient submodule. The conductor galloping simulation subsystem comprises a fluctuating wind load applying submodule, a real-time dynamic load applying submodule, a conductor galloping dynamic simulation computing submodule and a post-processing submodule. The computer simulation platform system for the galloping of the overhead transmission conductors is capable of implementing computer simulation of the galloping of the overhead transmission conductors of various line structures under optional terrain and meteorological conditions, obtaining vibration characteristics and system mechanical parameters of the line system under different working conditions, and providing technical guidance for the line system design.

Description

Technical field [0001] The invention relates to a computer simulation platform system, in particular to a computer simulation platform system involving galloping overhead transmission lines. Background technique [0002] In winter, the surface of the wire will form a non-circular cross-section after being coated with ice. When the wind blows on such a wire at a certain speed, under certain conditions, the wire will gallop, commonly known as galloping. This is a kind of low frequency (about 0.1~3Hz) and large amplitude wire self-excited vibration. The galloping peak can reach more than 10 meters. This kind of wire vibration usually causes the mutual coupling of wire solid and air fluid, which is a nonlinear vibration. . This kind of galloping is generally large in amplitude, long lasting and accompanied by swings, which can cause great damage to the transmission line, easily cause interphase flashover, damage to the fittings, cause line tripping and power failure, or cause seriou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50H02G7/14
Inventor 胡基才
Owner WUHAN UNIV
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