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Power transmission cable resistance measurement method

A technology of resistance measurement and transmission line, applied in measurement devices, measurement of electrical variables, measurement of resistance/reactance/impedance, etc., can solve the problems affecting the calculation or prediction accuracy of power loss value, and achieve the effect of accurate measurement

Inactive Publication Date: 2020-06-05
张军
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Problems solved by technology

[0004] The current common transmission cable resistance measurement is the factory data after the cable is made, which is a fixed value. Therefore, in the actual power transmission process, such a factory fixed value is also used in the calculation of the loss value caused by cable heating. To a certain extent, it affects the calculation or prediction accuracy of the power loss value, so there is a need for a cable resistance value determination method that can compensate for changes in the cable resistance value due to ambient temperature changes

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0024] See attached figure 1 , a kind of transmission cable resistance measurement method provided by the present invention, specifically comprises the following steps:

[0025] S1. Select a transmission cable as the transmission cable for temperature test, and connect the transmission cable for temperature test into the temperature test circuit, and the temperature test circuit protects the power supply terminal, the transmission cable for temperature test, and the load terminal , the power supply end and the load end are respectively arranged at the power input end and the output end of the power transmission cable for the temperature test;

[0026] S2. Obtain the output power U of the power supply from the power input end of the power transmission cable for the temperatur...

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Abstract

The invention provides a power transmission cable resistance measurement method. According to the invention, the relation between the resistance value of the power transmission cable and the ambient temperature is obtained through a temperature test and based on a data fitting analysis method; on the basis, the resistance value of the power transmission cable is obtained through calculation according to the length and the sectional area of the power transmission cable used in the actual power transmission process and the temperature of the environment where the power transmission cable is located, and therefore accurate measurement of the resistance value of the power transmission cable in any environment is achieved.

Description

technical field [0001] The present application relates to the field of resistance measurement, in particular to a method for measuring the resistance of a power transmission cable. Background technique [0002] As the main path provider of power transmission, the transmission cable has power loss due to self-heating during the power transmission process. This power loss is one of the links that must be considered in planning power consumption. Therefore, in order to achieve accurate power consumption In order to plan, it is necessary to accurately determine the loss due to cable heating during power transmission. [0003] However, in the actual power transmission process, due to the change of ambient temperature, the cable will experience "thermal expansion and contraction" effect to a certain extent, and the cable will be loose or tight, that is, the length of the cable will be elongated or contracted, thus Cause the cable resistance value to change to a certain extent, th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02G01D21/02
CPCG01D21/02G01R27/02
Inventor 张军
Owner 张军