ANÁLISIS DEL VECTOR DE PARK PARA LA DETECCIÓN DE FALLAS ELÉCTRICAS EN EL ESTATOR DE UN AEROGENERADOR DE BAJA POTENCIA (PARK’S VECTOR ANALYSIS FOR ELECTRICAL FAULT DETECTION IN STATOR OF LOW POWER WIND TURBINE)

Raúl Arturo Ortiz Medina, Francisco Javier Villalobos Piña, Victor Arturo Maldonado Ruelas, Ricardo Álvarez Salas

Resumen


En este trabajo se realizó la detección de falla eléctrica de estator de una máquina síncrona de imanes permanentes (PMSM, por sus siglas en inglés) trifásica, funcionando como máquina eléctrica de un aerogenerador de baja potencia a diferentes velocidades. La falla eléctrica a detectar, son los circuitos abiertos provocados por cortos-circuitos entre vueltas de los devanados del estator de la PMSM. La detección de falla se realiza experimentalmente en un banco de pruebas diseñado y construido con base en una máquina de cd y un sistema electrónico de potencia que permite al motor imitar la energía mecánica del viento. Las señales trifásicas de corriente del estator de la PMSM son transformadas al marco de referencia αβ para obtener el módulo del vector de Park de las corrientes. El vector de Park se analiza con la transformada rápida de Fourier (FFT por sus siglas en inglés) para obtener la firma de falla.

In this work, the detection of stator electrical failure of a three-phase synchronous permanent magnet machine (PMSM), as an electric machine of a low power wind turbine, was performed at different speeds. The electrical fault to be detected are the open circuits caused by interturns short circuits of the stator windings of the PMSM. The fault detection is made experimentally in a test bench designed and built based on a dc machine and electronic power system that allows the motor to imitate the mechanical energy of the wind. The current signals of the stator of the PMSM are transformed to the αβ reference frame, in order to obtain the modulus of the Park vector of the currents. The Park vector is analyzed with the fast Fourier transform and thus obtain the fault signature.


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