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High-Power Solar Inverter Efficiency Measurements by Calorimetric and Electric Methods

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4 Author(s)
Aarniovuori, L. ; Dept. of Electr. Eng., Lappeenranta Univ. of Technol., Lappeenranta, Finland ; Kosonen, A. ; Sillanpää, P. ; Niemelä, M.

In this paper, the results of a European efficiency measurement for a 250-kW high-efficiency grid-connected solar inverter are presented. The efficiency measurements are performed both by electrical input-output and calorimetric methods. Two measurement series with input voltage levels of 500 and 750 VDC are carried out. An open- and balance-type calorimeter system that can measure power losses up to 30 kW is introduced and verified by resistor tests. The measurement results and their uncertainty are analyzed and discussed.

Published in:

Power Electronics, IEEE Transactions on  (Volume:28 ,  Issue: 6 )

Date of Publication:

June 2013

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