Title :
Comparison and evaluation of different three-level inverter topologies for PV systems
Author :
Schoner, Christian ; Derix, David ; Hensel, Andreas
Author_Institution :
Inst. for Solar Energy Syst., FRAUNHOFER ISE, Freiburg, Germany
Abstract :
In this work different three-level topologies suitable for PV systems are analyzed. First the basic operation principles of the Neutral Point Clamped (NPC), Active Neutral Point Clamped (ANPC) and Mixed Voltage Neutral Point Clamped (MNPC) topologies are explained and the used PWM strategies are presented. All three topologies are realized in hardware on a modular test setup, so that it is possible to operate them under the same conditions. Efficiency measurements under different conditions (switching frequency fPWM = {16; 48; 90} kHz, output power, silicon carbide (SiC) semiconductors, driving circuits) are shown. Exceptional efficiencies of η16kHz = 99.1 % and η90kHz = 98.6 % are obtained.
Keywords :
PWM invertors; driver circuits; elemental semiconductors; photovoltaic power systems; ANPC; MNPC; NPC; PV systems; PWM strategies; active neutral point clamped topology; driving circuits; mixed voltage neutral point clamped topology; modular test setup; neutral point clamped topology; output power; photovoltaic systems; silicon carbide semiconductors; switching frequency; three-level inverter topologies; Inverters; Power measurement; Pulse width modulation; Semiconductor device measurement; Switches; Topology; Transistors; Efficiency; Multilevel converters; Photovoltaic; Renewable energy systems; Silicon Carbide (SiC);
Conference_Titel :
Power Electronics and Applications (EPE'14-ECCE Europe), 2014 16th European Conference on
Conference_Location :
Lappeenranta
DOI :
10.1109/EPE.2014.6910810
