Revisión de metodologías de arranque óptimo de generación para el restablecimiento de sistemas de potencia considerando fuentes de energía convencionales y renovables no convencionales
Abstract:Después de un apagón a gran escala, el restablecimiento del sistema eléctrico de potencia (SEP) debe realizarse rápidamente. Para ello, se debe restablecer el parque de generación, el sistema de transmisión y finalmente, la demanda desatendida. Para obtener un proceso acelerado de restablecimiento es necesario establecer metodologías de arranque de unidades de generación, que pongan en marcha, primero, las unidades con arranque en negro y, después, se les lleve potencia de arranque a otras unidades de generaci… Show more
“…Electric power generation is fundamental to support the current living standards; therefore, the optimization of the components involved in the process has become crucial in this context since it guarantees a cost-effective operation [1]- [4]. Particularly, electric induction motors are widely used in the commercial, industrial and tertiary sectors due to their various advantages, such as a simple structure, robustness, reliability, easy control, among others.…”
Induction motors have played a central role in the techno-economic development of modern industries and electric power generation. However, the presence of recurring failures hinders a cost-effective performance and leads to catastrophic damage. Therefore, the present study proposed an assessment to investigate the influence of two types of failures in induction motors, namely failure due to broken bars in the rotor and defects in the connection between the rotor bars and the end ring. Accordingly, a three-phase induction motor was evaluated under different failure conditions that modified the operational torque and rotational speed. The results indicated that both types of failures magnify both the core and copper power losses by up to 13.3 % and 8 %, respectively, compared to the healthy condition. On the other hand, an efficiency reductionbetween 1.94 % to 3.41 % is an indication of failure progression. Finally, the appearance of harmonics 3 and 7, and the intensified magnitude of harmonic 5, represent a clear sign of failure occurrence related to rotor barsand defects in the connection to the end ring. In conclusion, the proposed methodology proved to be an adequate tool to predict failure appearance, which has a direct impact on extending the lifetime of induction motors.
“…Electric power generation is fundamental to support the current living standards; therefore, the optimization of the components involved in the process has become crucial in this context since it guarantees a cost-effective operation [1]- [4]. Particularly, electric induction motors are widely used in the commercial, industrial and tertiary sectors due to their various advantages, such as a simple structure, robustness, reliability, easy control, among others.…”
Induction motors have played a central role in the techno-economic development of modern industries and electric power generation. However, the presence of recurring failures hinders a cost-effective performance and leads to catastrophic damage. Therefore, the present study proposed an assessment to investigate the influence of two types of failures in induction motors, namely failure due to broken bars in the rotor and defects in the connection between the rotor bars and the end ring. Accordingly, a three-phase induction motor was evaluated under different failure conditions that modified the operational torque and rotational speed. The results indicated that both types of failures magnify both the core and copper power losses by up to 13.3 % and 8 %, respectively, compared to the healthy condition. On the other hand, an efficiency reductionbetween 1.94 % to 3.41 % is an indication of failure progression. Finally, the appearance of harmonics 3 and 7, and the intensified magnitude of harmonic 5, represent a clear sign of failure occurrence related to rotor barsand defects in the connection to the end ring. In conclusion, the proposed methodology proved to be an adequate tool to predict failure appearance, which has a direct impact on extending the lifetime of induction motors.
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