Title :
Multilevel converters for single-phase grid connected photovoltaic systems-an overview
Author :
Calais, Martina ; Agelidis, Vassilios G.
Author_Institution :
CRESTA, Curtin Univ. of Technol., Perth, WA, Australia
Abstract :
Multilevel voltage source inverters offer several advantages compared to their conventional counterparts. By synthesising the AC output terminal voltage from several levels of voltages, staircase waveforms can be produced, which approach the sinusoidal waveform with low harmonic distortion, thus reducing filter requirements. The need of several sources on the DC side of the converter makes multilevel technology attractive for photovoltaic applications. This paper provides an overview an different multilevel topologies and investigates their suitability for single-phase grid connected photovoltaic systems. Several transformerless photovoltaic systems incorporating multilevel converters are compared regarding issues such as component count and stress, system power rating and the influence of the photovoltaic array earth capacitance
Keywords :
bridge circuits; harmonic distortion; invertors; photovoltaic power systems; power system harmonics; AC output terminal voltage synthesis; cascaded inverter; component count; component stress; filter requirements reduction; flying capacitor inverter; full bridge single leg clamped inverter; half bridge diode clamped inverter; low harmonic distortion; magnetic coupled inverter; multilevel converters; multilevel voltage source inverters; photovoltaic applications; photovoltaic array earth capacitance; single-phase grid connected photovoltaic systems; sinusoidal waveform; staircase waveforms; step inverter; system power rating; transformerless photovoltaic systems; Capacitance; Earth; Filters; Harmonic distortion; Inverters; Photovoltaic systems; Solar power generation; Stress; Topology; Voltage;
Conference_Titel :
Industrial Electronics, 1998. Proceedings. ISIE '98. IEEE International Symposium on
Conference_Location :
Pretoria
Print_ISBN :
0-7803-4756-0
DOI :
10.1109/ISIE.1998.707781
