NDLI: A new Approach for Semi-Automated Measurement of PV Inverters, especially MPP Tracking Efficiency, using a Linear PV Array Simulator with High Stability

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A new Approach for Semi-Automated Measurement of PV Inverters, especially MPP Tracking Efficiency, using a Linear PV Array Simulator with High Stability

Content Provider	Semantic Scholar
Author	Haeberlin, Heinrich Borgna, Luciano Fachhochschule, Berner
Copyright Year	2004
Abstract	HTI Burgdorf's PV laboratory has carried out many tests with small grid-connected PV-inverters since 1988. At first the size of the available PV generator was 3 kWp, then since 1994 60kWp. A significant extension of the testing faci- lities was possible with the introduction of suitable PV array simulators. Several linear PV generator simulators up to 25kW with high stability and fast transient response were developed in 1998 to 2000. In 2002 and 2003, a significant improvement of the measuring software was realised which makes possible semi-automated tests of PV inverters including the mea- surement of MPP-tracking efficiency. Only with such semi-automated tests it is possible to perform extended inverter tests under many different operating conditions (e.g. for different DC voltages and on I-V-curves with different fill-factors and shapes) in a reasonable time. Measurement of MPP-tracking efficiency is quite difficult and requires a PV array simulator of high stability and no interaction with the inverter to be tested. In this paper, a new method of extracting MPP-power directly from the measured data points is presented. In many cases, this method allows automatic determination of static and dynamic MPPT-efficiency with no need for time-consuming separate MPP-measurements on each power level with external devices.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://pvtest.ch/Dokumente/Publikationen/096_SIM_MPPT_Paris04_02.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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