Method for measuring ground potential by use of multilayer sensor structure, and multilayer sensor structure

Abstract

The invention discloses a method for measuring ground potential by use of a multilayer sensor structure, and also discloses a multilayer sensor structure. The multilayer sensor structure comprises four copper-sheet electrodes, the four copper-sheet electrodes are successively arranged in a parallel mode and are successively a copper-sheet electrode I, a copper-sheet electrode II, a copper-sheet electrode III and a copper-sheet electrode IV from top to bottom, the copper-sheet electrode I and the copper-sheet electrode II have the same specifications, the copper-sheet electrode III and the copper-sheet electrode IV have the same specifications, the specifications of the copper-sheet electrode I and the copper-sheet electrode II are smaller than the specifications of the copper-sheet electrode III and the copper-sheet electrode IV, and the four copper-sheet electrodes are sealed in an epoxy resin insulation material. The method provided by the invention overcomes disadvantages of a conventional measurement method, can directly obtain the ground potential of a detected point, realizes real-time monitoring of ground potential values, and is convenient to use and is reliable in measurement result.

Description

technical field [0001] The invention relates to the field of electric parameter measurement, in particular to a method for measuring ground potential by adopting a multilayer sensor structure. Background technique [0002] At present, there are mainly numerical calculation methods and actual measurement methods for the measurement of ground potential. [0003] The numerical calculation method is calculated by the equivalent formula for grounding conditions in different situations. When the grounding device of a power plant or substation has a large area, it can be approximated as a circular plate grounding device; the ground potential can be calculated by the following formula: Among them, ID is the current flowing into the ground through the grounding device, RD is the grounding resistance of the grounding device, r is the equivalent radius of the grounding device, and X is the distance from the edge of the grounding device to the calculation point; the tower grounding de...

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Problems solved by technology

However, the three-pole method has higher requirements on the soil model, which is affected by factors such as the anisotropic power frequency interference of soil resistivity and the mutual inductance between the leads of the potential electrode and the current electrode; the four-pole method has problems such as excessive measurement current and long leads. Problem: There is a problem that it is difficult to place the measurement power supply in the variable frequency measurement method and the different frequency measurement method

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