A method for evaluating the performance of ZnO resistors under multiple pulses based on energy absorption

Abstract

The invention provides a method for evaluating the performance of a ZnO resistor sheet under multiple pulses based on energy absorption, including setting up a test evaluation platform. The multi-pulse impulse current generator is used to apply multiple pulses to the zinc oxide resistance sheet, the data required for calculating the energy is measured by the impact data acquisition device, and then the measured energy value is optimized by the intelligent algorithm and the theoretical reference value of the energy absorption of the zinc oxide resistance sheet , the optimized formula obtains the final energy absorption evaluation factor after considering different pulse time intervals, and finally evaluates the performance of the zinc oxide resistor sheet; the beneficial effect of the present invention is to provide a multi-pulse ZnO resistor based on energy absorption The performance evaluation method of the chip, and a test platform is built, which can more realistically simulate the multiple lightning strike environment, provide a solid foundation for the evaluation of zinc oxide resistor chips under special working conditions, and provide an important guarantee for the safe operation of power grid lines.

Description

technical field [0001] The invention belongs to the technical field of performance evaluation of zinc oxide resistance sheets of lightning arresters of power systems, in particular to a performance evaluation method of ZnO resistance sheets under multiple pulses based on energy absorption. Background technique [0002] Zinc oxide arresters are widely used in power system transmission lines due to their good nonlinear characteristics, especially with the vigorous development of UHV power grids in my country, the voltage level is getting higher and higher, and the height of transmission towers is also increasing. Ray plays an irreplaceable role. The interior of the arrester is mainly composed of multiple zinc oxide resistor sheets stacked. The performance of the zinc oxide resistor sheet is directly related to the quality of the arrester. Therefore, the performance evaluation of the zinc oxide arrester resistor sheet cannot be ignored. [0003] Usually, lightning is not only a...

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Problems solved by technology

[0003] Usually, lightning is not only a single impact, but also includes two or more return strikes. Compared with a single lightning strike, multiple lightning strikes are more likely to cause performance degradation or even damage to the zinc oxide resistor

In addition, the amplitude, time interval and number of pulses of different lightning strikes have different damages to zinc oxide resistors, and the absorbed energy is also different. At present, the evaluation of the insulation performance of zinc oxide resistors at home and abroad is mainly focused on a single lightning strike. However, there is a lack of research on the performance of zinc oxide resistors from the perspective of energy absorption in the case of multiple lightning strikes. Therefore, there is an urgent need for a test platform and method that considers different lightning strike time intervals from the perspective of energy absorption. Starting from the test and evaluation of the performance of zinc oxide resistors, it can be used as a reference for improving the design of zinc oxide resistors.

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