Title :
A hybrid multi-converter system combining single-phase converters with three-phase converter
Author :
Fukuda, Shoji ; Yoshida, Takatsugu
Author_Institution :
Graduate Sch. of Inf. Sci. & Technol., Hokkaido Univ., Sapporo
Abstract :
A new hybrid multilevel multi-converter system combining three single-phase GTO converters with a three-phase NPC IGBT converter is proposed. The GTO converters can adjust the output voltage, though they operate in square-wave switching to minimize the switching-related device losses. The IGBT converter not only cancels the harmonic voltages generated by the GTO converters but also controls the resultant output voltage. The system can accomplish a wider adjustable output voltage range compared with other hybrid systems. A control strategy in relation to a required reference voltage is proposed to obtain minimum harmonic distortion in the resultant output voltage. A 1.5 kW prototype is built and experimental results verify the validity of the proposed system and control strategy. Comparative studies on hybrid converter system performance with a different number of GTO converters are also included
Keywords :
harmonic distortion; harmonics suppression; switching convertors; 1.5 kW; IGBT converter; harmonic distortion; harmonic voltage cancellation; hybrid multiconverter system; hybrid systems; single-phase GTO converters; square-wave switching; switching-related device losses; three-phase converter; Control systems; Harmonic distortion; Hybrid power systems; Insulated gate bipolar transistors; Power system harmonics; Power system simulation; Prototypes; Pulse width modulation converters; Switching converters; Voltage control; Converter circuit; Converter control; Efficiency; Harmonics; Multilevel converters;
Conference_Titel :
Power Electronics and Applications, 2005 European Conference on
Conference_Location :
Dresden
Print_ISBN :
90-75815-09-3
DOI :
10.1109/EPE.2005.219252
