Development of a Synchronous–Generator Experimental Bench for Standstill Time–Domain Tests

 

M.A. Arjona*¹, M. Cisneros–Gonzalez², C. Hernandez³

 

^1,3 División de Estudios de Posgrado e Investigación, Instituto Tecnológico de la Laguna, Paseo de las Gemas 52, Residencial La Rosa, Torreón, Coah. 27266 México. *E–mail: marjona@ieee.org

² Departamento de Ciencias Básicas, Instituto Tecnológico del Valle del Guadiana, Carretera Durango–México Km. 22.5, Durango, Dgo. 34371 México.

 

ABSTRACT

This paper presents the development of an experimental bench for performing time–domain tests on synchronous machines at standstill. The test bench allows the collection of experimental data which can then be used in the parameter estimation of mathematical models of synchronous motors and generators. The system development is based on the LabVIEW programming language. It effortlessly allows the calibration of voltage and current sensors, the d–q magnetic axis positioning of the synchronous generator, and the spectral analysis from the collected data. In addition, the testing environment includes non–sophisticated instrumentation elements and a power amplifier. This experimental bench has a friendly user interface which guides the user throughout a defined methodology to allow the achievement of the different time domain tests on synchronous machines. A 7kVA, 220V, 60Hz synchronous generator was used to show the functionality and usefulness of the test bench in research and teaching electrical machine theory.

Keywords: Synchronous generator, time–domain tests, standstill tests, virtual instrument.

 

RESUMEN

Este artículo presenta el desarrollo una plataforma para implementar pruebas experimentales en el dominio del tiempo a generadores síncronos en estado de reposo. La plataforma de pruebas permite la obtención de datos experimentales que pueden ser utilizados posteriormente para la estimación de parámetros tanto de los modelos matemáticos de motores como de generadores síncronos. El desarrollo del sistema se basa en el lenguaje de programación LabVIEW, permitiendo de manera sencilla la calibración de los sensores de corriente y de voltaje, el posicionamiento de la máquina síncrona en sus ejes d–q, así como el análisis espectral de las señales adquiridas. Además, el sistema cuenta con elementos de instrumentación no sofisticados y un amplificador de potencia. La plataforma incluye una interfaz amigable que guía al usuario a través de una metodología definida del desarrollo de las diferentes pruebas en el dominio del tiempo en generadores síncronos. Para demostrar la funcionalidad y utilidad de la plataforma de pruebas en la enseñanza e investigación de máquinas eléctricas se empleó un generador síncrono de 7kVA, 220V y 60Hz.

 

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