CN-122017359-A - Method, system, equipment, medium and product for determining impact grounding resistance of pile foundation of pole tower

CN122017359ACN 122017359 ACN122017359 ACN 122017359ACN-122017359-A

Abstract

The invention relates to the technical field of power systems, and discloses a method, a system, equipment, a medium and a product for determining the impact grounding resistance of a tower pile foundation, which accurately simulate the characteristics of the impact grounding resistance of a vertical placement scene and a horizontal placement scene by constructing a tower pile foundation grounding simulation model and combining simulation conditions under the vertical placement scene and the horizontal placement scene, and then, a functional relation between the correction coefficient and the soil resistivity is established through data fitting, and based on the fitting functional relation, the actual soil resistivity of the current tower pile foundation to be measured and the actual impact grounding resistance value under a horizontal placement scene are combined to obtain the actual impact grounding resistance value of the current tower pile foundation to be measured under a vertical placement scene, so that the accurate equivalent evaluation of the impact grounding resistance under the vertical working condition is realized by utilizing the convenience of horizontal placement test.

Inventors

WU YIJIANG
LI CHUIYOU
XUE XUMING
ZHOU YI
Chan Qizhong
CHEN HAOMING
ZHOU YUPENG
MENG CHENXU
CHENG RUI
CHEN SIJIN
DONG ZHICONG
LI XINHAI
WU MIANTING
LIANG GUOJIAN
LI BEI
ZENG LINGCHENG
JIANG YUHUAN
XIONG ZHENDONG

Assignees

广东电网有限责任公司中山供电局

Dates

Publication Date: 20260512
Application Date: 20260129

Claims (10)

1. The method for determining the impact grounding resistance of the pile foundation of the pole tower is characterized by comprising the following steps of: Constructing a tower pile foundation grounding simulation model based on the geometric parameters of the tower pile foundation and the soil environment parameters; setting boundary conditions of the tower pile foundation grounding simulation model respectively by combining simulation conditions of a vertical placement scene and a horizontal placement scene to obtain simulation models of the vertical placement scene and the horizontal placement scene; based on each group of preset soil resistivity, respectively carrying out simulation calculation on the simulation models under the vertical placement scene and the horizontal placement scene to obtain an impact grounding resistance value of the tower pile foundation under the vertical placement scene and an impact grounding resistance value under the horizontal placement scene; Performing numerical fitting on the basis of the impact grounding resistance values of the tower pile foundations under the vertical placement scenes and the impact grounding resistance values under the horizontal placement scenes under the multiple groups of different soil resistivities to obtain a fitting function relation between correction coefficients and the soil resistivities, wherein the correction coefficients are the ratio of the impact grounding resistance values of the tower pile foundations under the vertical placement scenes to the impact grounding resistance values under the horizontal placement scenes; Based on the fitting function relation, combining the actual soil resistivity of the current tower pile foundation to be measured with the actual impact grounding resistance value under the horizontal placement scene to obtain the actual impact grounding resistance value of the current tower pile foundation to be measured under the vertical placement scene.
2. The method for determining the impact ground resistance of the pile foundation of the tower according to claim 1, wherein the constructing the pile foundation grounding simulation model based on the geometric parameters of the pile foundation of the tower and the soil environment parameters comprises the following steps: constructing a three-dimensional geometric model of the tower pile foundation based on the geometric structure size, the material property and the soil environment parameter of the tower pile foundation; and setting initial boundary conditions and mesh subdivision on the three-dimensional geometric model to obtain the tower pile foundation grounding simulation model.
3. The method for determining the impact grounding resistance of the pile foundation of the tower according to claim 1, wherein the boundary condition of the ground simulation model of the pile foundation of the tower in the vertical placement scene is set as that the resistivity of the whole pile foundation of the three-dimensional geometric model of the pile foundation of the tower is the soil resistivity.
4. The method for determining the impact ground resistance of the pile foundation of the tower pile foundation according to claim 1, wherein the boundary condition of the ground simulation model of the pile foundation of the tower pile foundation in the horizontal placement scene is set to zero conductivity of the preset upper half part of the pile foundation of the three-dimensional geometric model of the pile foundation of the tower pile foundation, the resistivity of the preset lower half part of the pile foundation of the three-dimensional geometric model of the pile foundation of the tower pile foundation is soil resistivity, and the same infinite boundary condition is set around.
5. The method for determining the impulse grounding resistance of the pile foundation of the tower according to claim 1, wherein the step of performing simulation calculation on the simulation models in the vertical placement scene and the horizontal placement scene based on the preset soil resistivity of each group to obtain the impulse grounding resistance of the pile foundation of the tower in the vertical placement scene and the impulse grounding resistance of the pile foundation in the horizontal placement scene comprises the following steps: Updating the preset soil resistivity to simulation models under the vertical placement scene and the horizontal placement scene respectively aiming at each group of preset soil resistivity; Based on a preset standard impulse current waveform as an excitation source, the impulse grounding resistance values of the tower pile foundation in the vertical placement scene and the horizontal placement scene are respectively obtained by respectively applying the impulse grounding resistance values to the updated simulation models in the vertical placement scene and the horizontal placement scene to run transient electromagnetic simulation.
6. The method for determining the impact ground resistance of the pile foundation of the tower according to claim 1, wherein the obtaining the actual impact ground resistance of the pile foundation of the tower to be tested in the vertical placement scenario based on the fitting function relation by combining the actual soil resistivity of the pile foundation of the tower to be tested and the actual impact ground resistance in the horizontal placement scenario comprises: Based on the fitting function relation, determining a correction coefficient of the current tower pile foundation to be measured by combining the actual soil resistivity of the current tower pile foundation to be measured; and determining the actual impact grounding resistance value of the current tower pile foundation to be measured in the vertical placement scene according to the correction coefficient of the current tower pile foundation to be measured and the actual impact grounding resistance value in the horizontal placement scene.
7. A pole tower pile foundation impact ground resistance determination system, comprising: the simulation model construction module is used for constructing a grounding simulation model of the tower pile foundation based on the geometric parameters and the soil environment parameters of the tower pile foundation; The boundary setting module is used for respectively setting boundary conditions of the tower pile foundation grounding simulation model by combining simulation conditions of the vertical placement scene and the horizontal placement scene to obtain simulation models of the vertical placement scene and the horizontal placement scene; The resistance simulation calculation module is used for respectively carrying out simulation calculation on the simulation models under the vertical placement scene and the horizontal placement scene based on the preset soil resistivity of each group to obtain an impact grounding resistance value of the tower pile foundation under the vertical placement scene and an impact grounding resistance value under the horizontal placement scene; the function fitting module is used for carrying out numerical fitting on the basis of the impact grounding resistance values of the tower pile foundations under the vertical placement scene and the impact grounding resistance values under the horizontal placement scene under a plurality of groups of different soil resistivities to obtain a fitting function relation between correction coefficients and the soil resistivities, wherein the correction coefficients are the ratio of the impact grounding resistance values of the tower pile foundations under the vertical placement scene to the impact grounding resistance values under the horizontal placement scene; And the grounding resistance calculation module is used for obtaining the actual impact grounding resistance value of the current tower pile foundation to be measured in the vertical placement scene by combining the actual soil resistivity of the current tower pile foundation to be measured and the actual impact grounding resistance value in the horizontal placement scene based on the fitting function relation.
8. An electronic device comprising a memory and a processor, wherein the memory stores a computer program which, when executed by the processor, causes the processor to perform the steps of the method of determining a pole foundation impact ground resistance as claimed in any one of claims 1 to 6.
9. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed performs the steps of the tower pile foundation impact ground resistance determination method of any one of claims 1-6.
10. A computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, wherein the program instructions, when executed by a computer, cause the computer to perform the steps of the tower pile foundation impact ground resistance determination method of any one of claims 1-6.

Description

Method, system, equipment, medium and product for determining impact grounding resistance of pile foundation of pole tower Technical Field The invention relates to the technical field of power systems, in particular to a method, a system, equipment, a medium and a product for determining the impact grounding resistance of a pile foundation of a pole tower. Background In the electric power transmission network, the tower pile foundation not only bears the structural function of supporting the overhead line, but also forms a key ring of the grounding device of the power transmission system. Good grounding is an important measure for guaranteeing safe and stable operation of a power system, preventing lightning impulse and short-circuit current damage and protecting equipment and personal safety. Therefore, the ground resistance of the pile foundation of the tower is accurately measured, and the ground resistance is a vital routine test in the construction and operation and maintenance of the power engineering. At present, for measuring the grounding resistance of the pile foundation of the tower, the standard method and the theoretical model in the industry are based on the actual working state that the pile foundation grounding resistance is vertically buried in the soil. The traditional measurement technology, such as a tripolar method (potential drop method), and the like, has the electrode arrangement, the current field distribution model and the result interpretation, and defaults to a pile foundation as a conductor for vertical flow in the ground. However, in the actual testing procedure, especially in the process of manufacturing pile foundations, factory inspection, or spot inspection after operation on construction sites, placing pile foundations as long as several meters to more than ten meters vertically and creating a soil environment meeting the measurement requirements face a great challenge. This requires deep excavation of large vertical tunnels or the use of specially-made test wells, resulting in demanding test sites, cumbersome configuration procedures, low efficiency and high costs. Disclosure of Invention In view of the above, the present invention provides a method, a system, a device, a medium and a product for determining the impact ground resistance of a pile foundation of a tower. The first aspect of the invention provides a method for determining the impact grounding resistance of a pile foundation of a pole tower, which comprises the following steps: Constructing a tower pile foundation grounding simulation model based on the geometric parameters of the tower pile foundation and the soil environment parameters; setting boundary conditions of the tower pile foundation grounding simulation model respectively by combining simulation conditions of a vertical placement scene and a horizontal placement scene to obtain simulation models of the vertical placement scene and the horizontal placement scene; based on each group of preset soil resistivity, respectively carrying out simulation calculation on the simulation models under the vertical placement scene and the horizontal placement scene to obtain an impact grounding resistance value of the tower pile foundation under the vertical placement scene and an impact grounding resistance value under the horizontal placement scene; Performing numerical fitting on the basis of the impact grounding resistance values of the tower pile foundations under the vertical placement scenes and the impact grounding resistance values under the horizontal placement scenes under the multiple groups of different soil resistivities to obtain a fitting function relation between correction coefficients and the soil resistivities, wherein the correction coefficients are the ratio of the impact grounding resistance values of the tower pile foundations under the vertical placement scenes to the impact grounding resistance values under the horizontal placement scenes; Based on the fitting function relation, combining the actual soil resistivity of the current tower pile foundation to be measured with the actual impact grounding resistance value under the horizontal placement scene to obtain the actual impact grounding resistance value of the current tower pile foundation to be measured under the vertical placement scene. Preferably, the constructing the tower pile foundation grounding simulation model based on the geometric parameters and the soil environment parameters of the tower pile foundation includes: constructing a three-dimensional geometric model of the tower pile foundation based on the geometric structure size, the material property and the soil environment parameter of the tower pile foundation; and setting initial boundary conditions and mesh subdivision on the three-dimensional geometric model to obtain the tower pile foundation grounding simulation model. Preferably, the boundary condition of the tower pile foundation grounding simulation model in t