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Investigation Concerning the Excitation Loss of Synchronous Generators in a Stand-Alone Ship Power Plant

Author

Listed:
  • Dariusz Tarnapowicz

    (Faculty of Mechatronics and Electrical Engineering, Maritime University of Szczecin, 70-500 Szczecin, Poland)

  • Sergey German-Galkin

    (Faculty of Mechatronics and Electrical Engineering, Maritime University of Szczecin, 70-500 Szczecin, Poland)

  • Marek Staude

    (Faculty of Mechatronics and Electrical Engineering, Maritime University of Szczecin, 70-500 Szczecin, Poland)

Abstract

The protection systems of ship generators enable them to eliminate potential failures that pose a significant threat to the safety of the crew and the use of the ship. However, due to the fact that marine classification societies do not require the protection of generators against the loss of excitation, such protection is only used sporadically. This article presents an LOE (loss of excitation) analysis of ship generators that operate in parallel. This analysis is supported by simulations and experimental research. The test results show that the positions of the operating points of each generator are interrelated, and changes in the excitation of one (damaged) generator cause automatic changes in the excitation, as well as changes in electromagnetic and energy processes, in the second (efficient) generator. An LOE in one generator causes a dangerous increase in armature currents in both generators. The results of this study prove that the lack of LOE protection at lower levels of excitement in one of the generators causes (by activating the required protection) the efficient generator to be switched off first. The main conclusion of this article is that the introduction of the use of security measures against LOE should be obligatory and legally required.

Suggested Citation

  • Dariusz Tarnapowicz & Sergey German-Galkin & Marek Staude, 2021. "Investigation Concerning the Excitation Loss of Synchronous Generators in a Stand-Alone Ship Power Plant," Energies, MDPI, vol. 14(10), pages 1-17, May.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:10:p:2828-:d:554721
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    References listed on IDEAS

    as
    1. Danny Ochoa & Sergio Martinez, 2018. "Proposals for Enhancing Frequency Control in Weak and Isolated Power Systems: Application to the Wind-Diesel Power System of San Cristobal Island-Ecuador," Energies, MDPI, vol. 11(4), pages 1-25, April.
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    3. Sergey German-Galkin & Dariusz Tarnapowicz & Zbigniew Matuszak & Marek Jaskiewicz, 2020. "Optimization to Limit the Effects of Underloaded Generator Sets in Stand-Alone Hybrid Ship Grids," Energies, MDPI, vol. 13(3), pages 1-19, February.
    4. Hyeon-Jin Moon & Young Jin Kim & Jae Won Chang & Seung-Il Moon, 2019. "Decentralised Active Power Control Strategy for Real-Time Power Balance in an Isolated Microgrid with an Energy Storage System and Diesel Generators," Energies, MDPI, vol. 12(3), pages 1-22, February.
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