DocumentCode :
565895
Title :
A novel time-sharing dual-mode control strategy in cascaded sinusoidal inverter
Author :
Xu, Wei ; Qin, Haihong ; Zhou, Bo ; Xue, Henghuai ; Yang, Lijun
Author_Institution :
Jiangsu Key Lab. of New Energy Generation & Power Conversion, Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Volume :
2
fYear :
2012
fDate :
2-5 June 2012
Firstpage :
820
Lastpage :
825
Abstract :
Considering the distinct characteristic-differences and uneven working conditions of solar PV cells, a new solution of cascaded PV modules with time-sharing dual-mode control strategy for PV power system is proposed for achieving high power conversion efficiency, generating high output voltages. Each cascaded module contains three solar cells in series, N strings in parallel, and a time-sharing dual-mode power unit. The modular power unit depends mainly on diminishing the electrolytic DC capacitor, reducing the influence of uneven working conditions and using a bypass diode-assisted boost chopper to increase the boosting ratio. Owing to the (2M+1) level output voltage and unique selective time-sharing dual-mode control strategy, harmonic components of the output voltage and switching losses can be diminished. The unique operating principle of this novel power conditioner and its dual-mode PWM time-sharing control strategy are evaluated and verified based on simulation results.
Keywords :
PWM invertors; choppers (circuits); electrolytic capacitors; photovoltaic power systems; power supply quality; power system harmonics; solar cells; time-sharing systems; voltage control; cascaded sinusoidal inverter; diode assisted boost chopper; dual mode PWM time-sharing control strategy; electrolytic DC capacitor; harmonic components; modular power unit; output voltage; power conditioner; selective time-sharing dual-mode control strategy; solar photovoltaic cells; switching loss; time-sharing dual mode control strategy; Capacitors; Choppers (circuits); Inverters; Photovoltaic cells; Pulse width modulation; Switches; Voltage control; Absolute sinewave tracking strategy; Cascaded inverter; Dual-mode control; Time-sharing operation; solar photovoltaic power system;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics and Motion Control Conference (IPEMC), 2012 7th International
Conference_Location :
Harbin
Print_ISBN :
978-1-4577-2085-7
Type :
conf
DOI :
10.1109/IPEMC.2012.6258946
Filename :
6258946
Link To Document :
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