Diseño de un Amplificador de Voltaje Clase D Multinivel para Prueba de Relevadores de Protección (Design of a Multilevel Class D Voltage Amplifier for Relay Testing)

Aldo Molina Moreno (), Fernando Martínez Cárdenas (fernando.martinez.c@itmorelia.edu.mx), Guillermo Gutiérrez Alcaraz (ggutiera@gmail.com)

Instituto Tecnológico de Morelia
This paper appears in: Revista IEEE América Latina

Publication Date: June 2014
Volume: 12,   Issue: 4 
ISSN: 1548-0992

A new design of a high power voltage amplifier, using a multilevel converter, for testing protection relays is presented in this paper. The multilevel converter consists of two cascaded H bridges with asymmetrical sources. The technique of Nine Levels Sinusoidal Pulse Width Modulation (9LS-PWM) is used to generate a high quality output signal. The high fidelity signal, amplified both in voltage and power, is reconstructed through the use of a π filter. The working principle of the converter is simulated and validated through a set of simulation studies using the PSCAD/EMTDC Simulator. Additionally, an analysis of harmonic distortion content and total harmonic distortion (THD), based on several traditional modulation techniques, are presented.

Index Terms:
Multilevel Converter, Relay Testing, Voltage Amplifier   

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