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As in most of the renewable energy sources it is not possible to generate high voltage directly, the study of high gain dc-dc converters is an emerging area of research. This paper presents a high step-up dc-dc converter based on current-fed Cockcroft-Walton multiplier. This converter not only steps up the voltage gain but also eliminates the use of high frequency transformer which adds to cost and...
This paper discusses the employment of averaged circuit-based models for studying the electromagnetic transients of three-phase, grid-connected, photovoltaic (PV) systems. The paper first briefly introduces the structure and controls of a three-phase grid-connected PV system, and then presents the procedures for construction of averaged models for power-electronic core of the PV system. Finally, the...
In this paper, a high speed soft-start control circuit is proposed to implement the Current-Mode DC-DC Converter. The time for the soft-start does not depend on the load condition from no load to the maximum load current. The proposed circuit consists of SSRAMP, VREFRAMP and a small differential-voltage generator. The SSRAMP is a piecewise linear voltage that has four different ramps. The VREFRAMP...
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