Numerical computation and analysis method of characteristic parameters of transformer substation grounding grid

Abstract

The invention discloses a numerical computation and analysis method of characteristic parameters of a transformer substation grounding grid. A user can rapidly obtain resistance and potential distribution and gradient distribution of the grounding grid according to the design drawing of the grounding grid, establish the three-dimensional surface graph, the color gradation graph, the gray scale graph and the contour map of the potential distribution and the gradient distribution of the grounding grid and intuitively see the design advantages and disadvantages of the grounding grid according to a drawn distribution graph and a drawn transformer substation grounding grid graph, so that important engineering practical values for new construction and reconstruction of the grounding grid can be obtained.

Description

technical field [0001] The invention relates to the field of electric power safety research, in particular to a numerical calculation and analysis method for characteristic parameters of a substation grounding grid. Background technique [0002] The substation grounding grid is a combination of working grounding, lightning protection grounding and protective grounding. The calculation of grounding system parameters plays an extremely important role in ensuring the safe operation of the substation. In recent years, with the development of power system transmission towards high-voltage, long-distance, large-capacity, AC-DC parallel grids, the current flowing through the ground grid during faults is also increasing, and the potential of the ground grid during faults also rises. high. Accidents caused by defects in grounding measures have also occurred frequently, and the power sector has put forward higher requirements for the design of grounding grids. The grounding grid is ...

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Problems solved by technology

[0005] The invention provides a numerical calculation and analysis method for the characteristic parameters of the substation grounding grid, which solves the problem of unreasonable calculation methods, inaccurate formulas, and large errors that cannot give the entire surface potential distribution in the existing method for calculating the numerical value of the grounding grid. and the potential gradient distribution, and the technical problems of poor flexibility, realized that the resistance, potential distribution and gradient distribution of the grounding grid can be quickly obtained according to the design drawing of the grounding grid, and the three-dimensional surface diagram, color scale diagram, and color scale diagram of the grounding grid potential and gradient distribution can be established The grayscale map and contour map have good accuracy and strong flexibility, and according to the drawn distribution map and substation ground network map, you can intuitively see the pros and cons of the grounding grid design, which is very important for the construction and construction of the grounding grid. Transformation of technical effects with important engineering practical value

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