Contenido principal del artículo

Autores

El presente artículo es un estudio del estado del arte, donde se analiza las ventajas y desventajas de las diferentes técnicas clásicas de procesamiento digital de señales usadas para identificar frecuencias armónicas que distorsiona las formas de onda de voltaje y corriente de una red eléctrica. Tomando como referencia las técnicas clásicas que determinan la distorsión armónica de una señal eléctrica. Se propone una alternativa para la detección de frecuencias armónicas en una forma de onda eléctrica, basada en algoritmos de sensado comprimido; esta técnica extrae una muestra eficiente y reducida de la señal en estudio, dicha muestra es transformada al dominio de la frecuencia mediante una base de transformación que, para el presente caso de estudio es la transformada discreta del coseno (DCT). La señal reducida en el dominio de la frecuencia es sometida a un proceso de optimización no lineal, el cual clasifica los coeficientes, extrae los más representativos y convierte en cero a los menos representativos, es aquí donde salen a relucir de una forma clara y precisa las frecuencias armónicas, inmersas en la forma de onda eléctrica, con las cuales se calcula la distorsión armónica (THD). Este artículo muestra un ejemplo de la técnica de sensado comprimido, para la detección de frecuencias armónicas en una señal sinusoidal teórica la cual está contaminada por armónicos de tercero y quinto orden, se extrae el vector de coeficientes optimizado y se identifica las frecuencias armónicas.

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Recibido 2021-02-21
Aceptado 2021-10-28
Publicado 2021-12-29