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ZnO resistor disc absorption energy equivalent analysis method and device and medium

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

Active Publication Date: 2020-10-16
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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  • ZnO resistor disc absorption energy equivalent analysis method and device and medium
  • ZnO resistor disc absorption energy equivalent analysis method and device and medium
  • ZnO resistor disc absorption energy equivalent analysis method and device and medium

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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

The invention discloses a ZnO resistor disc absorption energy equivalent analysis method and device and a medium, and the method comprises the steps: obtaining the dynamic volt-ampere characteristicsof a ZnO resistor disc through an impact current test, and drawing a static volt-ampere characteristic curve through the connection of current-voltage maximum points; fitting the static curve to obtain a characteristic formula, and calculating the absorption energy of the resistor disc under a given voltage or current waveform; along with the increase of the head time of the current waveform, theequivalence with the actual waveform is better when absorption energy simulation calculation is carried out through a static volt-ampere characteristic curve. The i resistor disc absorbed energy calculation method based on static volt-ampere characteristic curve fitting is provided for the first time, and is suitable for researching absorbed energy distribution characteristics of a multi-column parallel lightning arrester group. In an extra-high voltage power system, the severe working condition that the lightning arrester faces to absorb huge energy is switching operation or fault, the waveform wave head time is relatively long, and the equivalence of the calculation method is good.

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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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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