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Method and system for obtaining temperature rise of high-tension overhead transmission line

A transmission line and high-voltage overhead technology, which is applied to thermometers, thermometers, and electrical devices that use directly heat-sensitive electric/magnetic components, and can solve problems such as inaccurate measurement results

Inactive Publication Date: 2017-03-08
BEIJING XJ ELECTRIC +1
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Problems solved by technology

[0004] In view of the problem of inaccurate measurement results in the temperature rise monitoring technology of high-voltage overhead transmission lines in the prior art, the technical problem to be solved by the present invention is to provide a more effective and efficient method for obtaining the temperature rise of high-voltage overhead transmission lines and system

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  • Method and system for obtaining temperature rise of high-tension overhead transmission line

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[0092] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0093] The embodiment of the present invention proposes a method and system for obtaining the temperature rise of a high-voltage overhead transmission line. Based on the heat balance equation, the AC and DC resistance ratio is calculated by using the product of the skin effect coefficient and the iron loss coefficient. The AC-DC resistance ratio is a nonlinear function of current carrying capacity and temperature, and the equation to be obtained is complicated, but the result is more accurate. At the same time, in the embodiment of the present invention, Newton's iterative method is used to solve the equation, and the calculation steps of ampacity and temperature are given respectively, and the relationship between AC and DC resistance ratio and ampacity ...

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Abstract

The invention provides a method and system for obtaining temperature rise of a high-tension overhead transmission line. On the basis of a heat balance equation, a product of a skin effect coefficient and an iron loss coefficient is used to calculate the AC / DC resistance ratio. The AC / DC resistance ratio is a nonlinear function of current-carrying capacity and temperature, the equation to be solved is complex, but a result is more accurate. A Newton iterative method is used to solve the equation, the steps for calculating the current-carrying capacity and temperature are provided, and the relation of the AC / DC resistance ratio and the current-carrying capacity in different environmental conditions is calculated. Via calculation, the temperature rise value of the high-tension overhead transmission line is calculated.

Description

technical field [0001] The invention belongs to the technical field of information automation, and in particular relates to a method and a system for obtaining the temperature rise of a high-voltage overhead transmission line. Background technique [0002] Electricity is the cornerstone of modern human civilization, but due to the uneven distribution of power generation resources, our country has been facing the problem of long-distance large-scale power transmission. For example, most of China's hydropower and wind power resources are located in the central and western regions, and most of the thermal power resources are located in the northwest; therefore, how to stably and efficiently transmit power to the southeastern region, which consumes a lot of power, has always been an important part of ensuring production and life. . A large number of high-voltage overhead transmission lines are used for power transmission in the prior art. This method is expensive and can ensure...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/00
CPCG01K7/00
Inventor 刘浩刘红超张健周初南吕志来毛瑞磊杨薇毛俊森周述钢温国强
Owner BEIJING XJ ELECTRIC
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