CN-121980657-A - Pile foundation grounding structure design method and system

CN121980657ACN 121980657 ACN121980657 ACN 121980657ACN-121980657-A

Abstract

The invention discloses a design method and a system for a pile foundation grounding structure, which relate to the technical field of power system grounding, and a multi-physical field coupling simulation model is constructed by acquiring reference design parameters of the pile foundation grounding structure and adopting the reference design parameters, and carrying out iterative optimization on the design parameters to be optimized of the pile foundation grounding structure by adopting a multi-physical field coupling simulation model to obtain corresponding initial design parameters and target simulation parameters, and checking the initial design parameters according to the target simulation parameters and the multi-physical field coupling simulation model to obtain corresponding target design parameters. The technical problems that the conventional pile foundation grounding structure is designed by depending on an empirical formula or a simple static resistor, global optimal design is difficult to realize, and the operation reliability of a power transmission line is reduced are solved.

Inventors

LI XINHAI
ZHOU YI
Chan Qizhong
JIANG YUHUAN
XIONG ZHENDONG
ZHU YULIN
Cai Danxu
XIANG DAI
ZHU WENTAN
LUO HAIXIN
WU YIJIANG
DONG ZHICONG
LI BEI
ZENG LINGCHENG
WU MIANTING
LIANG GUOJIAN
LI CHUIYOU
XUE XUMING

Assignees

广东电网有限责任公司中山供电局

Dates

Publication Date: 20260505
Application Date: 20260129

Claims (10)

1. The design method of the pile foundation grounding structure is characterized by comprising the following steps of: obtaining reference design parameters of a pile foundation grounding structure, and constructing a multi-physical field coupling simulation model by adopting the reference design parameters; performing iterative optimization on the design parameters to be optimized of the pile foundation grounding structure by adopting the multi-physical field coupling simulation model to obtain corresponding initial design parameters and target simulation parameters; and verifying the initial design parameters according to the target simulation parameters and the multi-physical field coupling simulation model to obtain corresponding target design parameters.
2. The method for designing a pile foundation grounding structure according to claim 1, wherein the step of iteratively optimizing the design parameters to be optimized of the pile foundation grounding structure by using the multi-physical field coupling simulation model to obtain corresponding initial design parameters and target simulation parameters comprises the steps of: constructing an initial optimization parameter population for individuals by using the design parameters to be optimized of the pile foundation grounding structure; updating the multi-physical field coupling simulation model by adopting each design parameter to be optimized to obtain a plurality of target multi-physical field coupling simulation models; respectively carrying out coupling solution on each target multi-physical field coupling simulation model by adopting a preset transient solver to obtain a plurality of earth surface potentials and a plurality of injected lightning current amplitudes; Performing performance evaluation on each surface potential and each injected lightning current amplitude value respectively to obtain a plurality of objective function values, a plurality of impact grounding resistances and a plurality of uniformity indexes; and carrying out iterative optimization on the initial optimization parameter population by adopting each objective function value to obtain corresponding initial design parameters, and taking the impact grounding resistance and the uniformity index corresponding to the initial design parameters as target simulation parameters.
3. The method of designing a pile foundation grounding structure according to claim 2, wherein the step of performing performance evaluation on each of the surface potential and each of the injected lightning current amplitudes to obtain a plurality of objective function values, a plurality of impact grounding resistances, and a plurality of uniformity indexes, respectively, comprises: respectively determining the maximum value of the earth surface potentials corresponding to the injection lightning current amplitude values as the maximum earth surface potential; respectively carrying out ratio processing on the amplitude value of each injected lightning current and the corresponding maximum earth surface potential to obtain a plurality of impact grounding resistors; respectively inputting the earth surface potential corresponding to each injected lightning current amplitude value into a preset uniformity function to obtain a plurality of uniformity indexes; and respectively carrying out weighted operation on each impact grounding resistor and the corresponding uniformity index based on preset evaluation weight to obtain a plurality of objective function values.
4. The method of designing a pile foundation grounding structure according to claim 2, wherein the step of iteratively optimizing the initial optimization parameter population using the objective function values to obtain the corresponding initial design parameters comprises: updating the initial optimization parameter population according to each objective function value to obtain a new initial optimization parameter population; judging whether the iteration times of the initial optimization parameter population are larger than or equal to a preset iteration threshold value; When the iteration times are smaller than the iteration threshold, skipping and executing the step of updating the multi-physical field coupling simulation model by adopting each design parameter to be optimized to obtain a plurality of target multi-physical field coupling simulation models; And when the iteration times are greater than or equal to the iteration threshold, selecting the design parameter to be optimized corresponding to the minimum value in the objective function values as an initial design parameter.
5. The method of designing a pile foundation grounding structure according to claim 1, wherein the step of verifying the initial design parameters according to the target simulation parameters and the multi-physical field coupling simulation model to obtain corresponding target design parameters comprises: performing a scaling model test by adopting the initial design parameters to obtain corresponding test parameters; inputting the target simulation parameters and the test parameters into a preset calibration function to obtain corresponding first error values and second error values; When the first error value or the second error value is larger than a preset error threshold value, adjusting model parameters of the multi-physical field coupling simulation model, and performing jump execution on the to-be-optimized design parameters of the pile foundation grounding structure by adopting the multi-physical field coupling simulation model to perform iterative optimization so as to obtain corresponding initial design parameters and target simulation parameters; And when the first error value and the second error value are smaller than or equal to the error threshold value, determining the initial design parameter as a target design parameter.
6. The pile foundation grounding structure design method of claim 1, wherein the design parameters to be optimized comprise double-screw pitch, double-screw radius difference, tile arc length, controllable discharge gap, interlayer contact area ratio and annular horizontal grounding body spacing.
7. Pile foundation ground structure design system, characterized by, include: the construction module is used for acquiring reference design parameters of the pile foundation grounding structure and constructing a multi-physical field coupling simulation model by adopting the reference design parameters; The optimizing module is used for carrying out iterative optimization on the design parameters to be optimized of the pile foundation grounding structure by adopting the multi-physical field coupling simulation model to obtain corresponding initial design parameters and target simulation parameters; And the verification module is used for verifying the initial design parameters according to the target simulation parameters and the multi-physical field coupling simulation model to obtain corresponding target design parameters.
8. An electronic device comprising a memory and a processor, wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform the steps of the pile foundation grounding structure design method of any one of claims 1-6.
9. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed implements the pile foundation grounding structure design 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 pile foundation grounding structure design method of any one of claims 1-6.

Description

Pile foundation grounding structure design method and system Technical Field The invention relates to the technical field of grounding of power systems, in particular to a pile foundation grounding structure design method and system. Background Along with the continuous expansion of the construction scale of the ultra-high voltage transmission line, the line layout is continuously extended to the complicated geological areas such as southwest mountain areas, northwest loess plateau, coastal beaches and the like. The characteristics of high soil resistivity, strong soil corrosiveness, frequent lightning activities, high strength and the like generally exist in the areas, and extremely harsh requirements are put on the reliability, stability and durability of the pile foundation grounding structure of the power transmission line tower. The pile foundation grounding structure is used as a core link of lightning protection of a power system, the performance of the pile foundation grounding structure is directly related to safe and stable operation of a power transmission line, if the grounding effect is poor, serious accidents such as insulation breakdown of equipment and damage of a pole tower are easily caused under transient high-current impact, and the continuity of regional power supply is further affected, so that the pile foundation grounding structure adapting to a complex geological environment is needed urgently. At present, the existing pile foundation grounding structure is designed by depending on an empirical formula or a simple static resistor, the accurate simulation of transient electromagnetic-thermal coupling behavior is lacking, the structural parameters have no systematic multi-parameter collaborative optimization flow, the global optimal design is difficult to realize, and the running reliability of a power transmission line is reduced. Disclosure of Invention The invention provides a design method and a system for a pile foundation grounding structure, which solve the technical problems that the existing pile foundation grounding structure is designed by depending on an empirical formula or a simple static resistor, lacks of accurate simulation of transient electromagnetic-thermal coupling behaviors, has no systematic multi-parameter collaborative optimization flow of structural parameters, is difficult to realize global optimal design, and reduces the operation reliability of a power transmission line. The design method of the pile foundation grounding structure provided by the first aspect of the invention comprises the following steps: obtaining reference design parameters of a pile foundation grounding structure, and constructing a multi-physical field coupling simulation model by adopting the reference design parameters; performing iterative optimization on the design parameters to be optimized of the pile foundation grounding structure by adopting the multi-physical field coupling simulation model to obtain corresponding initial design parameters and target simulation parameters; and verifying the initial design parameters according to the target simulation parameters and the multi-physical field coupling simulation model to obtain corresponding target design parameters. Optionally, the step of iteratively optimizing the design parameters to be optimized of the pile foundation grounding structure by using the multi-physical field coupling simulation model to obtain corresponding initial design parameters and target simulation parameters includes: constructing an initial optimization parameter population for individuals by using the design parameters to be optimized of the pile foundation grounding structure; updating the multi-physical field coupling simulation model by adopting each design parameter to be optimized to obtain a plurality of target multi-physical field coupling simulation models; respectively carrying out coupling solution on each target multi-physical field coupling simulation model by adopting a preset transient solver to obtain a plurality of earth surface potentials and a plurality of injected lightning current amplitudes; Performing performance evaluation on each surface potential and each injected lightning current amplitude value respectively to obtain a plurality of objective function values, a plurality of impact grounding resistances and a plurality of uniformity indexes; and carrying out iterative optimization on the initial optimization parameter population by adopting each objective function value to obtain corresponding initial design parameters, and taking the impact grounding resistance and the uniformity index corresponding to the initial design parameters as target simulation parameters. Optionally, the step of performing performance evaluation on each of the surface potential and each of the injected lightning current amplitudes to obtain a plurality of objective function values, a plurality of impact grounding resistances and a plurality of unifor