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Open AccessArticle

Faulty Synchronization of Salient Pole Synchronous Hydro Generator

Faculty of Electrical Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland
Energies 2020, 13(20), 5491; https://doi.org/10.3390/en13205491
Received: 10 July 2020 / Revised: 24 September 2020 / Accepted: 16 October 2020 / Published: 20 October 2020
(This article belongs to the Special Issue Design and Application of Electrical Machines)
This article presents the simulation results of hydro generator faulty synchronization during connection to the grid for various voltage phase shift changes in a full range (−180°; 180°). A field-circuit model of salient pole synchronous hydro generator was used to perform the calculation results. It was verified using the measured no-load and three-phase short-circuit characteristics. This model allowed observing the physical phenomena existing in the investigated machine, especially in the rotor which was hardly accessible for measurement. The presented analysis shows the influence of faulty synchronization on the power system stability and the construction components which are the most vulnerable to damage. From a mechanical point of view, the most dangerous case was for the voltage phase shift equal to −120°, and this case was analyzed in detail. Great emphasis was placed on the following physical quantities: electromagnetic torque, stator current, stator voltage, rotor current, current in rotor bars, and active and reactive power. The physical quantities existing during faulty synchronization were compared with a three-phase sudden short-circuit state. From this comparison, we selected the values of physical quantities that should be taken into account during design of new hydro generators to withstand the greatest possible threats during long-term work. View Full-Text
Keywords: electrical machine; hydro generator; faulty synchronization; finite element method; field-circuit modeling electrical machine; hydro generator; faulty synchronization; finite element method; field-circuit modeling
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MDPI and ACS Style

Gozdowiak, A. Faulty Synchronization of Salient Pole Synchronous Hydro Generator. Energies 2020, 13, 5491. https://doi.org/10.3390/en13205491

AMA Style

Gozdowiak A. Faulty Synchronization of Salient Pole Synchronous Hydro Generator. Energies. 2020; 13(20):5491. https://doi.org/10.3390/en13205491

Chicago/Turabian Style

Gozdowiak, Adam. 2020. "Faulty Synchronization of Salient Pole Synchronous Hydro Generator" Energies 13, no. 20: 5491. https://doi.org/10.3390/en13205491

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