Title :
Parallel-connected converters with maximum power tracking
Author :
Siri, Kasemsan ; Conner, Kenneth A.
Author_Institution :
Electr. & Electron. Syst. Dept., Aerosp. Corp., El Segundo, CA, USA
Abstract :
An improved maximum power tracking (MPT) approach with dither signal injection is presented, including the results of computer simulation and prototype testing. It incorporates a "shared-bus" current-sharing method that can regulate many paralleled current-mode DC-DC power converters. The approach yields nearly uniform current-sharing as well as reliable MPT performance. Utilizing the combined current-sharing and MPT approaches, the MPT power system provides several advantages: (1) ease of system power expansion; (2) stable current-sharing; and (3) autonomous MPT during loss of output voltage regulation. The robust MPT control maintains both stable amplitude and frequency of solar-array voltage ripple
Keywords :
DC-DC power convertors; control system analysis computing; control system synthesis; electric current control; optimal control; photovoltaic power systems; power system analysis computing; power system control; robust control; solar cell arrays; voltage control; computer simulation; dither signal injection; maximum power tracking approach; output voltage regulation; parallel-connected power converters; paralleled current-mode DC-DC converters; power expansion; prototype testing; robust control; shared-bus current-sharing method; solar-array voltage ripple; stable current-sharing; Computer simulation; DC-DC power converters; Frequency; Maintenance; Power system reliability; Power system simulation; Robust control; Testing; Virtual prototyping; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-7404-5
DOI :
10.1109/APEC.2002.989279
