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Method and device for detecting transient temperature of overhead conductor

An overhead wire and detection method technology, applied in the field of electric power, can solve the problems of inaccurate environmental wind speed measurement and transient temperature detection error, etc., and achieve the effects of high reliability, accurate transient temperature and low implementation difficulty

Pending Publication Date: 2021-02-23
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0004] This application provides a method and device for detecting the transient temperature of overhead conductors, which is used to solve the problem of transient temperature detection of overhead conductors under short-term overload operation due to inaccurate measurement of ambient wind speed in the prior art. Large error technical problem

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  • Method and device for detecting transient temperature of overhead conductor
  • Method and device for detecting transient temperature of overhead conductor
  • Method and device for detecting transient temperature of overhead conductor

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Embodiment Construction

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0042] see figure 1 , a method for detecting the transient temperature of an overhead wire provided in an embodiment of the present application, comprising:

[0043] Step 101. Set the metal sphere in the same air environment as the overhead wire. When the overhead wire is overloaded for a short time, the metal sphere is in a state of transient temperature rise, an...

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Abstract

The invention discloses a method and device for detecting the transient temperature of an overhead conductor, and the method comprises the steps of setting a metal ball body in the same air environment as the overhead conductor, enabling the metal ball body to be in a transient temperature rise state during the short-time overload operation of the overhead conductor, and obtaining the temperatureof the metal ball body at intervals of preset time; based on the transient heat balance equation of the metal spheres, obtaining Reynolds numbers of the metal spheres through calculation according tothe temperatures of the metal spheres, and setting the average value of the Reynolds numbers of the metal spheres as the Reynolds number of the overhead conductor; converting the transient heat balance equation of the overhead conductor according to the Reynolds number of the overhead conductor to obtain a transient temperature prediction function of the overhead conductor; and substituting the preset time into the transient temperature prediction function to calculate the transient temperature of the overhead conductor in the preset time period, so that the technical problem of relatively large errors in transient temperature detection of the overhead conductor under short-time overload operation due to inaccurate measurement of the ambient wind speed in the prior art is solved.

Description

technical field [0001] The present application relates to the field of electric power technology, in particular to a method and device for detecting the transient temperature of overhead wires. Background technique [0002] At present, most of the overhead conductors in our country are in the state of heavy load operation. With the continuous increase of equipment connected to the power grid, higher requirements are put forward for the transmission capacity of the existing overhead conductors. Therefore, it is of great significance to study how to improve the transmission capacity of overhead conductors. Significance. Due to the large heat capacity of the overhead wire, when the current passing through the overhead wire increases for a short time, the temperature of the overhead wire will enter a steady state after a period of time. The main factor of short-term ampacity of overhead conductors is the transient temperature of overhead conductors. [0003] Existing detection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/11G01K13/00G06F113/16G06F119/08
CPCG06F30/20G06F17/11G01K13/00G06F2113/16G06F2119/08
Inventor 王锐彭向阳骆书剑邰彬
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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