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Title:
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Inverter undersizing in PV systems
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Author(s):
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Published by:
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Publication date:
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ECN
Energy in the Built Environment
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1-5-2003
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ECN report number:
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Document type:
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ECN-RX--03-025
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Conference Paper
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Number of pages:
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Full text:
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4
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Download PDF
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Presented at: 3rd World Conference on Photovoltaic Energy Conversion, Osaka, Japan, 11-18 mei 2003.
Abstract:
The choice of nominal power of the inverter should bebased on the operational power of the PV array, rather
than on the nominal power of the PV array. If an inverter
is chosen too small, power limitation loss will occur at
high irradiance levels when the available array power is
limited by the inverter's nominal (maximum) input power.
If an inverter is chosen too large unnecessarily high
investment costs are needed.
A graphical tool for inverter sizing in The Netherlands
was constructed, based on irradiation measurements on a
10-seconds time scale in Petten. It was shown however
that the irradiation distribution over The Netherlands is
such that this graphical tool cannot be used for all
locations in The Netherlands.
System designers are advised to use their own
simulation tools, based on hourly calculations, to
determine the optimum sizing factor for the given PV
system. To account for the peak-shaving effect of the
applied time steps of one hour, the resulting sizing factor
should be divided by a factor of about 1.07 for Northern
European locations (sea climate).
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