Lightning arrester valve plate performance evaluation system and method under lightning stroke
A technology for evaluating systems and arresters, which is applied in the direction of instruments, design optimization/simulation, and measuring devices, etc. It can solve problems such as low accuracy of evaluation methods, leakage current, and inability to evaluate the performance of arrester valves.
Active Publication Date: 2021-05-11
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology
To solve the problem that the existing arrester valve performance evaluation method is only based on the arrester leakage current and cannot effectively evaluate the performance of the arrester valve through multi-data fusion, resulting in low accuracy of the evaluation method
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[0042] Embodiments will be described in detail below, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples are not intended to represent all implementations consistent with this application. are merely exemplary of systems and methods consistent with some aspects of the present application as recited in the claims.
[0043] see figure 1 , figure 1 A schematic structural diagram of an embodiment of the lightning arrester valve sheet performance evaluation system provided in the present application.
[0044] In one aspect, the present application provides a system for evaluating the performance of a lightning arrester valve sheet, including: a processor 1, a power frequency power supply 2, an inrush current source 3, a high-precision voltage probe 4, ...
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The invention provides a system and a method for evaluating the performance of a lightning arrester valve plate under lightning stroke. The system comprises a processor, and a power frequency power supply, an impact current source, a high-precision voltage probe, a high-frequency current probe, a digital signal processor and an infrared camera which are connected with the processor. The method comprises the steps of a processor starting a power frequency power supply and applying a power frequency current to a to-be-detected lightning arrester valve plate; acquiring a first group of data acquired by a high-precision voltage probe, a high-frequency current probe, a digital signal processor and an infrared camera; keeping the power frequency power supply on, starting the impulse current source to apply lightning current waves, and obtaining a second group of data; and the processor calculating a performance comprehensive evaluation factor according to the first group of data and the second group of data to judge the performance of the lightning arrester valve plate to be detected. According to the application, the comprehensive evaluation factor of the performance of the valve plate is calculated by combining the leakage current and the temperature rise under the lightning stroke, and the performance of the lightning arrester valve plate is judged according to the comprehensive evaluation factor, so that the accuracy of the performance evaluation of the lightning arrester valve plate is effectively improved.
Description
technical field [0001] The invention belongs to the technical field of arrester protection, and in particular relates to a system and method for evaluating the performance of an arrester valve sheet under lightning strike. Background technique [0002] Zinc oxide arrester is an overvoltage protection device installed near the protected equipment in the power system and connected in parallel with the protected equipment to limit the overvoltage in the power system to a level that is harmless to insulation. Thus, transmission lines and electrical equipment are protected from atmospheric overvoltage and operating overvoltage damage such as lightning strikes. Zinc oxide arresters are used in various fields of electrical engineering due to their excellent nonlinearity, volt-ampere operating characteristics, good current capacity and simple and reliable structure. [0003] As the arrester protects power equipment for a long time, it is affected by severe weather such as lightning...
Claims
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IPC IPC(8): G06F30/20G01D21/02G06F119/04G06F119/08
CPCG06F30/20G01D21/02G06F2119/08G06F2119/04
Inventor 方正云马御棠程志万沈龙马仪潘浩刘欣彤张栋周利军
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST