Title :
Dynamic behaviour of a constant-frequency buck power cell in a photovoltaic battery charger with a maximum power tracker
Author_Institution :
Ascom Hasler Ltd., Berne, Switzerland
Abstract :
Criteria for the choice of a strategy for an extreme-seeking photovoltaic battery charger system are discussed. A feedback regulator stabilizing the input voltage to its power cell has been chosen and its dynamic model analyzed. The approach, based on the cell characteristic coefficients, is shown to accurately predict the behavior of this uncommon regulator with an LC input filter and is fed by a source with a nonnegligible output resistance. The availability of an easy-to-use dynamic model facilitates the visualization of the design tradeoffs and provides a comprehensive base for design decisions.<>
Keywords :
battery chargers; photovoltaic power systems; power convertors; solar cell arrays; tracking; LC input filter; cell characteristic coefficients; constant-frequency buck power cell; dynamic model; feedback regulator; nonnegligible output resistance; photovoltaic battery charger; power tracker; Batteries; Feedback; Filters; Fluctuations; Photovoltaic systems; Power system modeling; Regulators; Solar power generation; Switches; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1990. APEC '90, Conference Proceedings 1990., Fifth Annual
Conference_Location :
Los Angeles, CA, USA
DOI :
10.1109/APEC.1990.66414