CONTROLLED SWITCHING OF THE T402 TRANSFORMER IN THE KRIŽOVANY 400KV SUBSTATION

František Janíček – Martin Mucha – Karol Česnek – Jozef Kováčik

    The paper deals with simulating the circumstances of switching surge and trigger current at switching-in of the T402 autotransformer recently installed in Kri\v{z}ovany, with the tests conducted by means of ATP (Alternative Transient Program) simulation software for simulating transient electromagnetic phenomena. The target has been to determine temporal curves for the most critical surge instances against earth and between the phases and the curves for trigger current with and without surge limiters connected, and to determine by means of simulations the size and statistical frequency of switching surges and based on a controlled switching simulation, to describe the limination of transient phenomena during the process and in reference to the simulations and to operating manual for the PSD02 Siemens control unit, suggest the required configuration settings for the unit.

Keywords: switching surge, trigger current, T402 autotransformer

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