Simulation of Transformer Impulse Test Circuit and Optimization of Impulse Generator Setup Using Genetic Algorithm

Document Type : Original Article

Authors

1 - Faculty of Engineering, University of Zanjan, Zanjan, Iran

2 Faculty of Engineering, University of Zanjan, Zanjan, Iran

Abstract

The lightning strikes create fast and high amplitude transient over-voltages in power systems which are called lightning impulse voltages. To ensure the quality of the insulation system of the transformer to deal with such over-voltages, at quality control high voltage test fields of manufacturers, similar voltages are produced by an Impulse Generator and applied to the transformer. Since frequency response of the transformer has a decisive role in the generated voltage waveform and given that the frequency responses of transformers with different designs are different, a main challenge in this field is to produce an impulse waveform with specifications specified in IEC60060-1. In high voltage test fields using an empirical method, the parameters of the impulse generator such as series and parallel resistors are set to achieve a standard impulse wave shape. This try and error empirical method is time consuming and besides, the standard wave shape cannot be achieved in some special design transformers. To overcome these problems, a precise simulation method for transformer impulse test circuit is provided in this paper and the genetic algorithm is adopted to determine the optimum values of impulse generator resistors. Finally, the simulation results are validated using the experimental works.

Keywords

References

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TABRIZ JOURNAL OF ELECTRICAL ENGINEERING
Volume 49, Issue 4 - Serial Number 90
February 2020
Pages 1495-1504

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