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This work analyzes the stability of a cascaded converter system comprised of two dc-dc converters operating with voltage-mode controllers. First it develops a single converter small-signal model and derives the mathematical representation of the converter from it. Next, it derives the required closed-loop transfer functions and input and output impedances from the model. Then, it develops the cascaded...
This paper is concerned with the problem of the voltage control in a photovoltaic multi-string technology-based DC/DC boost converter. A new fuzzified PI regulator is proposed in order to adapt the voltage control to the non linear and time variant characteristics of the PV source. In particular the fuzzified PI controller parameters can be modified according to the variation of the system transfer...
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