Title :
Fault-tolerant scaleable solar power bus architectures with maximum power tracking
Author :
Siri, Kasemsan ; Conner, Kenneth A.
Author_Institution :
Power & Analog Eng. Sect., Aerosp. Corp., El Segundo, CA, USA
Abstract :
An improved maximum power tracking (MPT) approach with dither signal injection is presented. It incorporates a “shared-bus” current-sharing method that can regulate many paralleled current-mode DC-DC converters. Through simulation, the approach yields nearly uniform current-sharing as well as reliable MPT performance. Utilizing the combined current-sharing and MPT approaches, three proposed architectures provide several advantages: (1) ease of system power expansion, (2) stable current-sharing, and (3) autonomous MPT during loss of output voltage regulation. Both stable amplitude and frequency of array voltage ripple are maintained by the robust MPT control
Keywords :
DC-DC power convertors; fault tolerance; photovoltaic power systems; robust control; solar cell arrays; voltage control; array voltage ripple amplitude; array voltage ripple frequency; dither signal injection; fault-tolerant scaleable solar power bus architectures; loss of output voltage regulation; maximum power tracking; nearly uniform current-sharing; paralleled current-mode DC-DC converters regulation; robust control; shared-bus current-sharing method; simulation; stable current-sharing; system power expansion; Circuits; Control systems; DC-DC power converters; Fault tolerance; Frequency; Power systems; Pulse width modulation converters; Solar energy; Sun; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2001. APEC 2001. Sixteenth Annual IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-6618-2
DOI :
10.1109/APEC.2001.912490
