Algoritmo de detección en modo isla de un inversor, basado en la medición del segundo armónico
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Date
2013-09-24
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista
Abstract
Introduction. This paper introduces a new method
of islanding detection for distributed energy generation
systems. Objective. To demonstrate that, with
the method proposed, it is possible to achieve detection
time measurements within the security margins
defined by the regulations. Materials and methods.
The method was implemented on a 230 W inverter.
This method is based on the introduction of a disturbance
at the inverter´s output and the subsequent
observation of the tension in the common coupling
point (CCP), which depends on the impedance connected
to the latter, in an islanding situation. The islanding
detection is based on the Fourier´s analysis.
Results. Simulation and experimental results are
provided, under several load and net conditions,
achieving, in all cases, adequate detection times,
not affecting the inverter´s performance in terms of
harmonic distortion or reactive power. Conclusions.
The method proposed, if compared to others based
on the injection of harmonics, can detect the islanding
situation by the use of the Fourier´s analysis
applied to a unique harmonic, with no degradation of
the power quality and within the time periods defined
by the regulations.
Description
Keywords
Corporación Universitaria Lasallista, Análisis de fourier, Inversor (electrónica), Electrónica, Algoritmo de detección, Segundo armónico