ESTUDIO DE LA DISTORSION ARMONICA TOTAL EN MATLAB/SIMULINK DEL INVERSOR TRIFÁSICO PWM (MATLAB/SIMULINK STUDY OF TOTAL HARMONIC DISTORTION OF PWM THREE-PHASE INVERTER)
Resumen
El inversor trifásico es un módulo electrónico muy importante, utilizado en la industria moderna. En este artículo, se presenta un estudio de la distorsión armónica total (THD) con en el ambiente Matlab/Simulink, para hacer comprensibles a los estudiantes los conceptos de los esquemas modernos de conversión de potencia. Se presentan los resultados de simulación de un inversor trifásico con carga balanceada RL y con filtro LC de salida, empleando la técnica de modulación de ancho de pulso sinusoidal. Se utiliza el bloque de la transformada rápida de Fourier FFT, para la evaluación de la THD de la corriente y voltaje de fase, variando el índice de modulación en amplitud (m_a) y el índice de modulación en frecuencia (m_f). Como resultado, la THD se reduce por el uso del filtro LC de salida y por el incremento de m_a y m_f. Matlab/Simulink es útil como herramienta didáctica.
Palabras Clave: Distorsión armónica total, inversores trifásicos, Matlab/Simulink.
Abstract
Three-phase inverter is a very important electronic module, used in modern industry. In this paper, a study of the total harmonic distortion (THD) with the Matlab/Simulink environment is presented, to make the concepts of modern power conversion schemes understandable to students. The simulation results of a three-phase inverter with a balanced load RL and with an LC output filter are presented, using the sinusoidal pulse width modulation technique. The fast Fourier transform FFT block is used for the evaluation of the THD of the phase current and voltage, varying the amplitude modulation index (m_a) and the frequency modulation index (mf). As a result, the THD is reduced using the output LC filter and by the increase in m_a and m_f. Matlab/Simulink is useful as a teaching tool.
Keywords: Three-phase inverters, total harmonic distortion, Matlab / Simulink.
Texto completo:
459-473 PDFReferencias
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