A method for analyzing the performance of resistance valve plate in zinc oxide arrester

A technology for resistive valves and lightning arresters, applied in the direction of instruments, measuring electricity, and measuring electrical variables, etc., can solve the problems of large limitations and inability to analyze the performance of zinc oxide resistor valves of lightning arresters, and achieve the goal of reducing research and development costs and reducing manpower and material resources Effect

Active Publication Date: 2021-06-01
CHINA THREE GORGES UNIV
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Problems solved by technology

[0003] At present, the research on the zinc oxide resistance valve plate of the arrester mainly adopts the experimental method of electronic probe measurement, which has great limitations and cannot deeply analyze the performance of the zinc oxide resistance valve plate of the arrester from the microscopic molecular level.

Method used

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  • A method for analyzing the performance of resistance valve plate in zinc oxide arrester
  • A method for analyzing the performance of resistance valve plate in zinc oxide arrester
  • A method for analyzing the performance of resistance valve plate in zinc oxide arrester

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Embodiment Construction

[0037] like figure 1 As shown, a method for analyzing the performance of the resistance valve plate in the zinc oxide arrester, the specific steps are as follows,

[0038] Step 1: use computer to construct the two-phase grain boundary structure of the ZnO resistance valve plate;

[0039] Step 1.1: Construct ZnO(002) / β-Bi 2 o 3 (210) two-phase grain boundary structure;

[0040] Step 1.2: adopt CASTEP software package to carry out structure optimization to unit cell;

[0041] Step 1.3: Determine the exchange and correlation potential, and solve the Kohn-Sham equation self-consistently;

[0042] Step 2: Perform relaxation calculation on the established grain boundary structure, compare the grain boundary structure before and after relaxation, and analyze the atomic displacement;

[0043] Step 3: Carry out secondary differential charge density analysis on the relaxed grain boundary structure, and analyze the charge transfer between layers;

[0044] Step 4: Carry out electron...

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Abstract

The invention discloses a method for analyzing the performance of a resistance valve plate in a zinc oxide lightning arrester. The first principle is used to construct the two-phase grain boundary structure of a ZnO resistance valve plate by a computer; the CASTEP software package is used to optimize the structure of the unit cell; Perform relaxation calculations on the grain boundary structure, compare the grain boundary structure before and after relaxation, and analyze the atomic displacement; perform secondary differential charge density analysis and atomic electron population analysis on the relaxed grain boundary structure; conduct electronic potential energy of the grain boundary structure Analysis and interfacial atomic fractional wave density of states analysis. Compared with the experimental measurement method, the present invention studies the microstructure existing inside the ZnO resistance valve sheet, analyzes the built-in electric field of the grain boundary structure, determines the charge amount of the electron track of the interface atoms, analyzes the bonding situation of the atoms in the layer sheet, and analyzes the internal electric field of the grain boundary structure. It is of great significance to improve the nonlinear volt-ampere characteristics of materials and develop high-performance zinc oxide arresters.

Description

technical field [0001] The invention belongs to the research field of arrester characteristics, in particular to a method for analyzing the performance of a resistance valve plate in a zinc oxide arrester. Background technique [0002] The basic structure of the metal zinc oxide arrester is the valve plate, which is made of zinc oxide as the main material, adding a small amount of other metal oxides and calcining at high temperature. Under normal operating voltage, the valve plate passes a very small resistive current, generally about 10-15μA, which is close to the insulation state. When the lightning overvoltage is applied to the arrester, its resistance decreases rapidly, the current passing through is very large, and the residual voltage is small, so that the equipment is protected. When the overvoltage disappears, the arrester resistor valve returns to the high resistance state. Because metal zinc oxide arresters have excellent nonlinear volt-ampere characteristics, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G06F30/20
CPCG01R31/00G06F30/367
Inventor 李亚莎黄太焕柯颢云谢云龙章小彬
Owner CHINA THREE GORGES UNIV
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