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Dynamic Model of Medium Voltage Vacuum Circuit Breaker and Induction Motor for Switching Transients Simulation Using Clark Transformation

Author

Listed:
  • Jan Pígl

    (Department of Power Electrical and Electronic Engineering, Faculty of Electrical Engineering and Communication, Brno University of Technology, 616 00 Brno, Czech Republic)

  • Radoslav Cipín

    (Department of Power Electrical and Electronic Engineering, Faculty of Electrical Engineering and Communication, Brno University of Technology, 616 00 Brno, Czech Republic)

Abstract

A derivation of the dynamic model of a medium voltage vacuum circuit breaker and induction motor in space vectors in coordinates α β 0 allow us to model switching transients in various dynamic states of the motor. In the case of the Clark transformation, the corresponding numerical integration technique can be selected including variable time-step integration techniques to avoid numerical instabilities due to the stiffness of the system. Assymetrical operations such as switching cause the power system to become unbalanced and the transformed equations α , β , and 0 are not uncoupled. Therefore, it is necessary to derive a coupling matrix between circuit breaker voltages and currents in the coordinate system α β 0 . The subject of our interest is switching overvoltages that arise when turning off small inductive currents by a vacuum circuit breaker. When deriving the model of a vacuum circuit breaker, all its properties encountered during this action are taken into account, i.e., current chop, virtual current chop, dielectric barrier in the circuit breaker and its recovery rate, and the ability of the vacuum circuit breaker to extinguish high frequency currents. Simulation results are compared with the measured results on a medium voltage motor as well as with the simulation results of the mathematical model of the test circuit according to IEC 62271-110 resolved using the nodal method (EMTP algorithm). Models are implemented in the MATLAB/Simulink programming environment.

Suggested Citation

  • Jan Pígl & Radoslav Cipín, 2023. "Dynamic Model of Medium Voltage Vacuum Circuit Breaker and Induction Motor for Switching Transients Simulation Using Clark Transformation," Energies, MDPI, vol. 16(3), pages 1-22, January.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:3:p:1020-:d:1038323
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    References listed on IDEAS

    as
    1. Diego Bellan, 2020. "Clarke Transformation Solution of Asymmetrical Transients in Three-Phase Circuits," Energies, MDPI, vol. 13(19), pages 1-19, October.
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