Simulated grounding test system and method for grounding material

A technology for simulating grounding and testing systems, applied in grounding resistance measurement, measuring resistance/reactance/impedance, instruments, etc., can solve problems such as difficulties in the design and verification of grounding grid structure design for new grounding material tests, and achieve flexible changes in soil resistivity and types The effect of richness and small test site

Inactive Publication Date: 2017-04-26
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0004] In recent years, with the development of power system grounding technology, great progress has been made in the improvement of grounding body materials, grounding grid structure design, grounding grid anticorrosion, resistance reducing agent, etc. Network structure design verification and so on still face many difficulties

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  • Simulated grounding test system and method for grounding material
  • Simulated grounding test system and method for grounding material
  • Simulated grounding test system and method for grounding material

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Embodiment Construction

[0029] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] figure 1 Shown is the structural representation of the system of the present invention, and the simulation tank (4) is the test site, and the ground grid (3) is placed in the simulation tank (4) according to a certain depth, and the simulation tank (4) is covered with sand and soil. (1) Provide power frequency current or inrush current for the grounding grid (3), see Figure 2~3 .

[0031] In the following, the graphite composite grounding material will be taken as an example, and the simulated grounding test system of the present invention will be used to compare the impact coefficients of the graphite composite grounding material with a diameter of 28mm and the expanded graphite composite grounding material with a diameter of 38mm. Based on the electromagnetic field theory and the similarity principle, the ...

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Abstract

The invention discloses a simulated grounding test system and method for a grounding material. The system comprises a simulated groove, a ground net and a power supply; the ground net is arranged in the simulated groove in a preset buried depth, the simulated groove is filled with sandy soil, and the power supply is connected to the ground net via a lead; and the simulated groove is formed by excavation in the flat ground. On the basis of an electromagnetic field theory and a principle of similitude, proportional relations among different related quantities during simulated test are derived, and large test is converted into small simulated test equivalently. The system and method can be used to carry out a series of simulated tests including grounding resistance measurement, new grounding material test, resistance reducing agent test and grounding characteristic research on the large ground net in a limited area directly, it can be ensured that a test effect is consistent with that of a real test; and a test place is small, the soil resistivity can be changed flexibly, various types of test can be completed, and the system and method can be applied to power frequency grounding simulated test, impact grounding simulated test, grounding body long-acting corrosion resistance test and the like.

Description

technical field [0001] The invention belongs to the technical field of lightning protection and grounding of electric power systems, and in particular relates to a simulated grounding test system and method for grounding materials. Background technique [0002] With the development of the power grid, the construction of power facilities is increasing year by year. my country has a vast territory, especially in the construction of UHV power grids in recent years, and high-voltage long-distance transmission lines have become more and more extensive across regions. There are many lightning-intensive areas distributed in the southern region, and multiple lightning accidents have brought great threats to the safe and reliable operation of transmission lines. [0003] The grounding resistance value of the power system grounding device is the main parameter to evaluate the grounding effect, especially the grounding resistance of the transmission line tower grounding device directl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/20
CPCG01R27/205
Inventor 柏彬丁志锋刘寅莹黄涛阮江军全妤
Owner STATE GRID CORP OF CHINA
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