Implementación de un inversor trifásico multinivel con fijación por diodos
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Date
2013-09-26
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista
Abstract
Introduction. Since its origin multilevel inverter has
been characterized as a competitive option in the
range of medium voltage for applications such as
motor drive, power quality and compensation and
connection of renewable sources to the grid. Objective:
To present the development of the design and
implementation of a multilevel three-phase inverter
relying on simulation to compare its performance
with a conventional two-level inverter in terms of
harmonic content of voltage and current signals and
the electric stress of power switches. Materials and
Methods: From the simulation results, using Simulink
of Matlab®, some criteria design are established
for the implementation of the inverter in which
power switches, power diodes, trigger circuits (drivers),
power supplies and a digital signal processor
are used. The modulation strategy is an extension of
the strategy used in conventional two-level inverters
which has been widely studied and applied according
to the referenced literature. Results: The prototype
presented in practice an equivalent behavior
to the obtained by simulation in terms of waveform
and values of phase and line voltages. The obtained
harmonic content of load voltage and current was
better compared to the two-level inverter. Likewise, it
has been obtained a reduction in the level of electric
stress endured by the power switches. Conclusions:
The implemented inverter allowed confirming why the
multilevel technology improves the systems performance
proving its competitiveness and applicability.
Description
Keywords
Corporación Universitaria Lasallista, Electrónica, Inversor (electrónica), Inversor multinivel (electrónica), Semiconductores, Pulse wide modulation (PWM)