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A method, device and medium for equivalent analysis of energy absorbed by zno resistor sheet

A technology of energy absorption and equivalent analysis, applied in measurement devices, measurement of electrical variables, measurement of electricity, etc., can solve problems such as difficulty in realizing large-scale parallel arrester groups, and achieve good equivalence effects

Inactive Publication Date: 2022-04-12
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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Problems solved by technology

And this method needs to determine the parameters of each resistor and obtain the waveform through simulation, which is difficult to achieve in a large-scale parallel arrester group

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  • A method, device and medium for equivalent analysis of energy absorbed by zno resistor sheet
  • A method, device and medium for equivalent analysis of energy absorbed by zno resistor sheet
  • A method, device and medium for equivalent analysis of energy absorbed by zno resistor sheet

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Embodiment Construction

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

[0044] Such as figure 1 As shown, the ZnO resistor sheet energy absorption equivalent analysis method described in this embodiment includes:

[0045] Include the following steps:

[0046] S100. Performing a ZnO resistor plate impulse current test through the impact test circuit to obtain actual current and voltage waveforms;

[0047] S200, taking the maximum point of the voltage and current waveforms of each impact test to obtain the static volt-ampere characteristic;

[0048] S300. Obtain the static volt-ampere characteristic equation of the res...

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Abstract

A method, device and medium for equivalent analysis of energy absorbed by a ZnO resistance sheet, first obtain the dynamic volt-ampere characteristics of the ZnO resistance sheet through an impulse current test, and draw the line connecting the current-voltage maximum points into a static volt-ampere characteristic curve; for the static curve The characteristic formula is obtained by fitting, and the absorbed energy of the resistor sheet can be calculated under a given voltage or current waveform; as the current waveform wave head time increases, the analog calculation of the absorbed energy through the static volt-ampere characteristic curve is equivalent to the actual waveform Sex is better. The present invention proposes for the first time a method for calculating the absorbed energy of resistors based on static volt-ampere characteristic curve fitting, which is suitable for the research on the distribution characteristics of absorbed energy of multi-column parallel arrester groups; For switching operation or failure, the wave head time is relatively long, and the equivalent of this calculation method is better.

Description

technical field [0001] The invention relates to the field of ZnO resistance sheet testing, in particular to a ZnO resistance sheet energy equivalent analysis method, device and medium. Background technique [0002] Due to its good nonlinear volt-ampere characteristics, ZnO varistors are used for overvoltage suppression in various occasions of power systems. With the rapid development of UHV in my country, especially in the DC transmission project converter station, the insulation coordination is complex, and there are many types of arresters, and there are many faults. After analysis and research, in the process of limiting the overvoltage withstand energy of the arrester, one of the main reasons is the influence of the deviation of the volt-ampere characteristic of the resistor. When the energy is high, some resistors age faster and are damaged first to form an avalanche effect. Cause arrester breakdown, system grounding lockout. [0003] In order to solve the fault probl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 李江涛何家欣王川刘志远艾绍贵于晓军虞江华刘波李秀广
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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