Method for evaluating performance of ZnO resistor disc under multiple pulses based on energy absorption

Abstract

The invention provides a multi-pulse ZnO resistor disc performance evaluation method based on energy absorption. The method comprises the step of building a test evaluation platform. Multiple pulses are applied to the zinc oxide resistor disc through the multi-pulse impact current generator, data required by energy calculation are measured by the impact data acquisition device, and then an energy measured value and a theoretical reference value of energy absorption of the zinc oxide resistor disc are optimized through an intelligent algorithm. A final energy absorption evaluation factor is obtained after the optimized formula considers different pulse time intervals, and finally the performance of the zinc oxide resistor disc is evaluated. The method for evaluating the performance of the ZnO resistor disc under multiple pulses based on energy absorption is provided, a test platform is built, multiple lightning stroke environments can be simulated truly, a solid foundation is provided for evaluation of the ZnO resistor disc under special working conditions, and an important guarantee is provided for safe operation of a power grid line.

Description

technical field [0001] The invention belongs to the technical field of performance evaluation of zinc oxide resistors for power system lightning arresters, in particular to a method for evaluating the performance of ZnO resistors under multi-pulse conditions based on energy absorption. Background technique [0002] Zinc oxide arresters are widely used in power system transmission lines due to their good nonlinear characteristics. Lei played an irreplaceable role. The interior of the arrester is mainly composed of multiple zinc oxide resistors stacked. The performance of the zinc oxide resistor is directly related to the quality of the arrester. Therefore, the performance evaluation of the zinc oxide arrester resistor cannot be ignored. [0003] Usually, lightning is not only a single strike, 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 ...

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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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