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Overhead transmission line current-carrying capacity calculation method, system and device

An overhead transmission line and flow calculation technology, applied in the electric power field, can solve the problems of many sensors and low calculation accuracy

Inactive Publication Date: 2020-10-23
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method, system and equipment for calculating the ampacity of overhead transmission lines, which are used to solve the technical problem of low calculation accuracy due to the large number of sensors involved in the calculation method of the maximum ampacity of transmission lines in the prior art

Method used

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  • Overhead transmission line current-carrying capacity calculation method, system and device
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  • Overhead transmission line current-carrying capacity calculation method, system and device

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Embodiment 1

[0046] A method for calculating the ampacity of an overhead transmission line provided in an embodiment of the present invention includes the following steps:

[0047] S1: Construct the heat dissipation function of the overhead transmission line. The heat dissipation function of the overhead transmission line refers to the relationship between the heat flux density of the overhead transmission line per unit time and the temperature difference between the conductor and the environment. The heat dissipation of the overhead transmission line is based on the heat dissipation function of the overhead transmission line to establish the heat dissipation model of the overhead transmission line;

[0048] S2: According to the established overhead transmission line heat dissipation model, calculate the value of the heat dissipation function of the overhead transmission line at steady state; by calculating the heat dissipation power of the overhead transmission line, and then input the hea...

Embodiment 2

[0051] A method for calculating the ampacity of an overhead transmission line provided in an embodiment of the present invention includes the following steps:

[0052] S1: Construct the heat dissipation function of the overhead transmission line. The heat dissipation function of the overhead transmission line refers to the relationship between the heat flux density of the overhead transmission line per unit time and the temperature difference between the overhead transmission line and the environment. Under the condition of heat dissipation, the heat dissipation model of overhead transmission line is established based on the heat dissipation function of overhead transmission line;

[0053] It should be further explained that the heat dissipation power Q per unit length of the overhead transmission line loss It consists of two parts, one part is the unit length convection cooling power Q c , part of which is the radiation heat dissipation power Q per unit length r :

[0054]...

Embodiment 3

[0086] Such as figure 2 As shown, an overhead transmission line ampacity calculation system includes an overhead transmission line heat dissipation model building module 201, a heat dissipation function numerical calculation module 202, and an overhead transmission line ampacity calculation module 203;

[0087] The overhead transmission line heat dissipation model construction module 201 is used to construct an overhead transmission line heat dissipation function, and establish an overhead transmission line heat dissipation model based on the overhead transmission line heat dissipation function;

[0088] The heat dissipation function numerical calculation module 202 is used to calculate the numerical value of the heat dissipation function of the overhead transmission line in a steady state according to the established overhead transmission line heat dissipation model;

[0089] The overhead transmission line ampacity calculation module 203 is used for calculating the overhead ...

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Abstract

The invention discloses an overhead transmission line current-carrying capacity calculation method, system and device. The method comprises the following steps: constructing a heat dissipation function of the overhead transmission line, establishing a heat dissipation model of the overhead transmission line, solving a numerical value of the heat dissipation function of the overhead transmission line by utilizing the heat dissipation model of the overhead transmission line, and calculating a wire current-carrying capacity of the overhead transmission line according to the numerical value of theheat dissipation function. According to the invention, the calculation of the current-carrying capacity of the overhead transmission line is realized through the heat dissipation model of the overhead transmission line, the number of parameters required to be measured in the calculation process is small, excessive sensors are not required, and the accuracy of calculating the current-carrying capacity of the overhead transmission line can be effectively improved.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a method, system and equipment for calculating the ampacity of an overhead transmission line. Background technique [0002] In recent years, with the continuous and rapid development of my country's economy, the power consumption has continued to increase, and the bottleneck of power transmission capacity has become very prominent. Especially in economically developed areas, the shortage of power supply has become one of the main reasons restricting economic development. [0003] There are also some difficulties in the operation of the power grid. First, the thermal stability limit of the transmission capacity of some lines has seriously restricted the capacity transmission in the system, especially in the case of insufficient transmission capacity due to insufficient transmission capacity. It causes the pressure limit load, which reduces the economy and reliability of the power gri...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F113/16G06F119/08
CPCG06F30/20G06F2113/16G06F2119/08
Inventor 彭向阳黄嘉健王锐骆书剑汪政
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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