ESTIMACIÓN DE MODOS DE OSCILACIÓN EN SISTEMAS ELÉCTRICOS DE POTENCIA (ESTIMATION OF OSCILLATION MODES IN ELECTRICAL POWER SYSTEMS)
Resumen
Las señales no lineales y no estacionarias han venido penetrando los sistemas eléctricos de potencia debido a la aparición de nuevas tecnologías que llevan consigo la utilización de electrónica. Como consecuencia, el criterio de calidad de potencia se ha tenido que adaptar a las nuevas condiciones de los sistemas eléctricos y esto ha llevado a la necesidad de buscar nuevas metodologías de análisis de las señales adquiridas. En este documento se presenta una revisión sobre los métodos de análisis que se han venido implementando en el procesamiento de señales no lineales y no estacionarias en sistemas eléctricos de potencia modernos. Para este fin se explora la aplicación de la Transformada de Hilbert-Huang (HHT), exponiendo cada una de las ventajas y desventajas de dicha implementación. Para validar la metodología se proponen señales sintéticas con características que describen de manera adecuada los comportamientos típicos en estos sistemas. Además, se realiza el análisis para una señal de corriente proveniente de un sistema de potencia con estas características.
Palabras Clave: Transformada de Hilbert-Huang, armónicos, oscilaciones, estimación.
Abstract
Non-linear and non-stationary signals have been penetrating electrical power systems due to the appearance of new technologies that involve the use of electronics. Consequently, the power quality criterion has had to adapt to the new conditions of the electrical systems, and this has led to the need to search for new methodologies for analyzing the signals obtained. This document presents a review of the analysis methods that have been implemented in non-linear and non-stationary signal processing in modern electrical power systems. For this purpose, the application of the Hilbert-Huang Transform (HHT) is explored, exposing each of the advantages and disadvantages of said implementation. To validate the methodology, synthetic signals with characteristics that adequately describe the typical behaviors in these systems are proposed. In addition, the analysis is performed for a current signal from a power system with these characteristics.
Keywords: Hilbert-Huang transform, harmonics, oscillations, estimation.
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