Instantaneous Specific Protection Method against Faulty Synchronizations of Synchronous Machines

Tian, Pengfei and Guerrero Granados, José Manuel and Mahtani Mahtani, Kumar Vijay and Platero Gaona, Carlos Antonio (2021). Instantaneous Specific Protection Method against Faulty Synchronizations of Synchronous Machines. "IEEE Access" ; pp. 1-11. ISSN 2169-3536. https://doi.org/10.1109/ACCESS.2021.3089853.

Description

Title: Instantaneous Specific Protection Method against Faulty Synchronizations of Synchronous Machines
Author/s:
  • Tian, Pengfei
  • Guerrero Granados, José Manuel
  • Mahtani Mahtani, Kumar Vijay
  • Platero Gaona, Carlos Antonio
Item Type: Article
Título de Revista/Publicación: IEEE Access
Date: 16 June 2021
ISSN: 2169-3536
Subjects:
Freetext Keywords: Power system protection; Power system transients; Generators
Faculty: E.T.S.I. Industriales (UPM)
Department: Automática, Ingeniería Eléctrica y Electrónica e Informática Industrial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The probability of faulty synchronization of a generator is very small, but not impossible. The main cause of a faulty synchronization is due to wiring errors caused during maintenance or commissioning when voltage transformer and synchronizing equipment are connected or reconnected wrongly. Faulty synchronizations of synchronous generators cause overcurrent and high electromagnetic torque values that can severely damage, not only the generators their selves, but also prime movers and step-up transformers. Moreover, they produce disturbances on the power system such as power oscillations and voltage sags that can end up collapsing the system if it is not cleared quickly. Despite that, conventional synchronous generator protection systems have not a specific function against faulty synchronizations. This paper presents and analyzes a new and specific protection method against faulty synchronizations. The method is based on an instantaneous low setting overcurrent protection that is only activated during synchronizations. Once the synchronization ends, the protection gets disabled in order to allow the increase of the generator power output. Consequently, it minimizes the damages and the disturbance in the power system through rapid detection and tripping. The method has been successfully validated by computer simulations for a thermal power plant 362 MVA turbo-generator, and by experimental tests on a 5 kVA laboratory generation unit.

More information

Item ID: 67412
DC Identifier: https://oa.upm.es/67412/
OAI Identifier: oai:oa.upm.es:67412
DOI: 10.1109/ACCESS.2021.3089853
Official URL: https://ieeexplore.ieee.org/document/9456931
Deposited by: Memoria Investigacion
Deposited on: 22 Jun 2021 13:32
Last Modified: 22 Jun 2021 13:32
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