Title :
High-Power Solar Inverter Efficiency Measurements by Calorimetric and Electric Methods
Author :
Aarniovuori, L. ; Kosonen, A. ; Sillanpää, P. ; Niemelä, M.
Author_Institution :
Dept. of Electr. Eng., Lappeenranta Univ. of Technol., Lappeenranta, Finland
Abstract :
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.
Keywords :
calorimetry; invertors; power grids; power system measurement; solar power stations; European efficiency measurement; balance-type calorimeter system; calorimetric method; electrical input-output methods; high-efficiency grid-connected solar inverter; high-power solar inverter efficiency measurements; open-type calorimeter system; power 250 kW; resistor tests; voltage 500 V; voltage 750 V; Current measurement; Heating; Inverters; Loss measurement; Power measurement; Temperature measurement; Uncertainty; Calorimetry; converters; efficiency; measurement; photovoltaic (PV);
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2012.2221166
