Method for establishing elliptic cylinder conductive bridge model between ground wire and suspension clamp

Abstract

The invention discloses a method for establishing an elliptic cylinder conductive bridge model between a ground wire and a suspension clamp, and the method comprises the following steps: calculating the contact pressure between the ground wire and the suspension clamp, and calculating the cross section area of a conductive bridge through the contact pressure; after the cross section area of the conductive bridge is calculated, constructing a simulation model based on a ground wire and suspension clamp structure in finite element simulation software; in the simulation model, adopting a hull anda clamping plate of the suspension clamp for cutting the outer-layer wire strand, and obtaining an oval cutting surface; respectively adjusting the extrusion positions of the hull and the clamping plate of the suspension clamp until the area of the oval cutting surface is equal to the area of the cross section of the conductive bridge; and stretching the oval cutting surface to form an oval column conductive bridge. The method has very important significance in the research of the temperature rise state between the ground wire and the suspension clamp, and solves the problem that the calculation of the temperature rise state at the ground wire suspension clamp in the existing model is not accurate enough.

Description

technical field [0001] The invention relates to the technical field of temperature rise state between a ground wire and a suspension wire clamp, in particular to a method for establishing an elliptical cylindrical conductive bridge model between a ground wire and a suspension wire clamp. Background technique [0002] In recent years, domestic ground line disconnection accidents have occurred frequently, sometimes causing large-scale power outages and causing huge economic losses. Operators found through observation that the location of the ground wire breakage often appears inside the suspension clamp. Scholars at home and abroad have found that the reason for the disconnection at this place is usually the result of the joint action of the contact resistance inside the clamp and the power frequency short-circuit current. Therefore, it is necessary to study and analyze the current distribution inside the suspension clamp to accurately calculate Its temperature rise is of gre...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the difficult problem in the prior art that the contact resistance of the contact surface between the ground wire and the suspension clamp cannot be accurately equivalent, and to provide an elliptical cylindrical conductive bridge between the ground wire and the suspension clamp Model building method

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