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Grounding grid grounding resistance measurement method

A technology of grounding resistance and measurement method, which is applied in the direction of grounding resistance measurement, measuring device, measuring electrical variables, etc., can solve the problems of low accuracy and achieve the effect of accurate grounding resistance

Inactive Publication Date: 2016-11-23
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0005] In the embodiment of the present invention, a method for measuring the grounding resistance of the grounding grid is provided to solve the problem of low accuracy of short-distance measurement results in the prior art

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  • Grounding grid grounding resistance measurement method
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  • Grounding grid grounding resistance measurement method

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Embodiment Construction

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0036] see figure 1 , figure 2 , image 3 and Figure 4 , figure 1 A schematic flow chart of a method for measuring the grounding resistance of a grounding grid provided by an embodiment of the present invention, figure 2 A schematic flow chart of another method for measuring the grounding resistance of the grounding grid provide...

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Abstract

The embodiment of the present invention discloses a method for measuring the grounding resistance of a grounding grid, comprising the following steps: setting a measuring loop, a voltage electrode and an auxiliary current electrode; measuring the distance between the voltage electrode and the auxiliary current electrode and the distance between the voltage electrode and the grounding grid According to the distance and the potential difference, the optimal parameter of the analytic function is obtained by the least square method; the grounding resistance value is calculated by using the optimal parameter and the analytic function. By measuring the auxiliary current electrode potential distribution, combined with the analytical calculation formula of the auxiliary current electrode potential, the least squares method is used to analyze the error of the fitting results and parameter selection, and determine the auxiliary current electrode measured potential distribution curve. The auxiliary current pole potential drops the potential of the grounding grid to be measured, and obtains the accurate value of the grounding potential rise of the grounding grid, so that a more accurate grounding resistance can be obtained.

Description

technical field [0001] The invention relates to the technical field of short-distance measurement of grounding resistance, in particular to a method for measuring the grounding resistance of a grounding grid. Background technique [0002] The grounding resistance of power plants and substations refers to the resistance presented by the grounding conductor network when the grounding current flows into the earth through the substation grounding conductor network. Grounding resistance reflects the level and capability of lightning protection grounding, protective grounding and working grounding of the power system, and is directly related to the safe and reliable operation of the power system. The measurement of grounding resistance can check and evaluate the design index, engineering construction and operation status of the grounding resistance of power plants and substation grounding grids, so as to ensure the safe and reliable operation of the power system. Therefore, the m...

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Application Information

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IPC IPC(8): G01R27/20G01R27/08
CPCG01R27/205G01R27/08
Inventor 彭庆军白洋周仿荣钱国超陈晓云马仪王科颜冰周兴梅姜雄伟
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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