چكيده به لاتين
Abstract—The photovoltaic (PV) grid-connected power system in the residential
applications is becoming a fast growing segment in the PV market due to the
shortage of the fossil fuel energy and the great environmental pollution. A new
research trend in the residential generation system is to employ the PV
parallelconnected configuration rather than the series-connected configuration to
satisfy the safety requirements and to make full use of the PV generated power.
How to achieve high-step-up, low-cost, and high-efficiency dc/dc conversion is the
major consideration due to the low PV output voltage with the parallel-connected
structure. The limitations of the conventional boost converters in these
applications are analyzed. Then, most of the topologies with high-step-up, lowcost, and high-efficiency performance are covered and classified into several
categories. The advantages and disadvantages of these converters are discussed.
Furthermore, a general conceptual circuit for high-step-up, low-cost, and
highefficiency dc/dc conversion is proposed to derive the nextgeneration
topologies for the PV grid-connected power system. Finally, the major challenges
of high-step-up, low-cost, and highefficiency dc/dc converters are summarized.
This paper would like to make a clear picture on the general law and framework for
the next-generation nonisolated high-step-up dc/dc converters. Index Terms—
Boost converters, high step-up, low cost and high efficiency, photovoltaic (PV) grid
connected.
