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Short-Circuit Fault Analysis of the Sen Transformer Using Phase Coordinate Model

Author

Listed:
  • Liang Bu

    (Department of Electrical Engineering, Guizhou University, Guiyang 550025, China)

  • Song Han

    (Department of Electrical Engineering, Guizhou University, Guiyang 550025, China)

  • Jinling Feng

    (Department of Electrical Engineering, Guizhou University, Guiyang 550025, China)

Abstract

The Sen Transformer (ST) provides an economical solution for power flow control and voltage regulation. However, fault analysis and evaluation of the performance of the transmission protection system in the presence of a ST have not been investigated. Hence, a short-circuit model of the ST using the phase coordinate method is proposed in this paper. Firstly, according to the coupled-circuit ST model, the nodal admittance matrix between the sending end and receiving end of the ST was deduced. Subsequently, a fully decoupled mathematical model was established that can reflect three characteristics, including its winding connection structure, electrical parameters, and ground impedance. Thus, with the help of the phase-coordinate-based solving methodology, a short-circuit ST model may be built for various short-circuit faults. The MATLAB and PSCAD/EMTDC software were employed to carry out simulated analyses for an equivalent two-bus system. The short-circuit currents obtained from the time-domain simulation and the analytic calculation utilizing the proposed model reached an acceptable agreement, confirming the simulation’s effectiveness. Moreover, the variation of the fault currents with the variation of the compensating voltage after single-phase-to-ground and three-phase short-circuit faults was demonstrated and used to analyze the effect of the ST on the fault currents.

Suggested Citation

  • Liang Bu & Song Han & Jinling Feng, 2021. "Short-Circuit Fault Analysis of the Sen Transformer Using Phase Coordinate Model," Energies, MDPI, vol. 14(18), pages 1-19, September.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:18:p:5638-:d:631219
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    References listed on IDEAS

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    1. Bilal Amjad & Mohammad Ahmad A. Al-Ja’afreh & Geev Mokryani, 2021. "Active Distribution Networks Planning Considering Multi-DG Configurations and Contingency Analysis," Energies, MDPI, vol. 14(14), pages 1-16, July.
    2. Hesong Cui & Xueping Li & Gongping Wu & Yawei Song & Xiao Liu & Derong Luo, 2021. "MPC Based Coordinated Active and Reactive Power Control Strategy of DFIG Wind Farm with Distributed ESSs," Energies, MDPI, vol. 14(13), pages 1-19, June.
    3. Stefano Bifaretti & Vincenzo Bonaiuto & Sabino Pipolo & Cristina Terlizzi & Pericle Zanchetta & Francesco Gallinelli & Silvio Alessandroni, 2021. "Power Flow Management by Active Nodes: A Case Study in Real Operating Conditions," Energies, MDPI, vol. 14(15), pages 1-16, July.
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