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Simulation test method for galloping of iced conductor

A wire galloping and simulation testing technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of difficult research on transmission line galloping mechanism and complex wire galloping mechanism

Inactive Publication Date: 2020-12-04
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The galloping mechanism of conductors is very complicated, and it is difficult to study the galloping mechanism of transmission lines

Method used

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  • Simulation test method for galloping of iced conductor
  • Simulation test method for galloping of iced conductor
  • Simulation test method for galloping of iced conductor

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Experimental program
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Embodiment Construction

[0041] The specific implementation of the ice-coated conductor galloping simulation measurement method of the present invention is as follows Figure 5 shown.

[0042] The implementation steps of the ice-coated conductor gallop simulation calculation method in this embodiment are as follows:

[0043] Step 1: Calculate the static stress of the wire

[0044]For a given combination of typical meteorological conditions, the determination process of conductor stress is as follows: first compare the magnitude of conductor stress under multiple groups of typical meteorological condition combinations, so that the maximum value of conductor stress in the combination of typical meteorological conditions reaches the maximum allowable use of the conductor Stress, that is, install the wire in this state to make it tensioned, and take the maximum value corresponding to that group of typical meteorological conditions as the given typical meteorological condition (set as A), and then use the...

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Abstract

The invention discloses a simulation test method for galloping of an iced conductor. According to the method, a four-degree-of-freedom multi-gear conductor-insulator system mechanical model is established by utilizing self-programming software. The method comprises steps of determining the initial tension of the wire through a stress state equation according to the typical meteorological conditioncombination, and determining the displacement of the conductor in an initial state by applying a catenary model, utilizing the aerodynamic characteristics of the iced conductor to obtain the stress condition of the conductor under the action of wind power, obtaining a conductor kinetic equation, and then adopting an explicit direct integral algorithm based on center difference to solve the displacement and stress condition of each node of the conductor at the discrete moment. According to the method, through simulation calculation, reliable results can be provided for solving the problems ofdisplacement and tension calculation at discrete moments when the iced conductor gallops under different working conditions. Therefore, scheme reference is provided for field tests, suggestions are provided for power transmission line design, data support is provided for actual line operation, and early warning is made for possible severe working conditions.

Description

technical field [0001] The invention relates to a simulation test method for galloping of ice-coated conductors, which belongs to the technical field of high-voltage overhead transmission lines. Background technique [0002] Conductor galloping refers to a low-frequency (about 0.1-3Hz) and large-amplitude (up to 10m or more) self-excited vibration induced by asymmetrical ice-coated conductors under the action of wind at a certain angle with the line direction. There are many hazards caused by conductor galloping. In the process of conductor galloping, the distance between phases will be shortened or even collided, resulting in flashover, tripping, etc., which may cause damage to hardware and insulators, broken strands of conductors, loosening of tower bolts, and even collapse. tower. Frequent tripping and power outages of lines caused by conductor galloping and damage to conductors themselves, fittings, towers, etc. will cause significant economic losses and social impacts....

Claims

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Application Information

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IPC IPC(8): G06F30/394G06F113/04G06F119/20
CPCG06F30/394G06F2113/04G06F2119/20
Inventor 周龙武张宇王黎明尹芳辉燕秀邹建章胡京饶斌斌况燕军李帆廖豪爽
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
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