Title :
Per panel photovoltaic energy extraction with multilevel output DC-DC switched capacitor converters
Author :
Cooley, John J. ; Leeb, Steven B.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Massachusetts Inst. of Technol., Cambridge, MA, USA
Abstract :
Switched capacitor multilevel output DC-DC converters are evaluated as panel integrated modules in a solar maximum power point tracking system. The recommended system includes a central input current-controlled ripple port inverter. Potential benefits include per panel MPPT without inter-panel communication, electrolytic capacitors or per panel magnetics. Statistical methods are used to predict average tracking and conversion efficiencies. A particular implementation of the switched capacitor module is studied - the Marx converter. Average total efficiencies (tracking × conversion) greater than 93% are predicted for a simulated 510 W, 3 panel, DC-DC system.
Keywords :
DC-DC power convertors; maximum power point trackers; photovoltaic power systems; solar power stations; statistical analysis; switched capacitor networks; DC-DC switched capacitor converters; Marx converter; current-controlled ripple port inverter; electrolytic capacitors; inter-panel communication; per panel magnetics; photovoltaic energy extraction; power 510 W; solar maximum power point tracking system; statistical methods; switched capacitor multilevel output DC-DC converters; Capacitors; Converters; Integrated circuit modeling; Inverters; Microwave integrated circuits; Monte Carlo methods; Switches; Marx; Module Integrated Converter; Multilevel; Photovoltaic; Ripple Port Inverter; Switched Capacitor;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE
Conference_Location :
Fort Worth, TX
Print_ISBN :
978-1-4244-8084-5
DOI :
10.1109/APEC.2011.5744631
