IEEE_JNL_2008_A Novel Topology for Photovoltaic DC-DC

scliao · 发表于 2009-4-7 16:00:02

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本文為IEEE JNL文件
標題：
A Novel Topology for Photovoltaic DC-DC Full-Bridge Converter With Flat Efficiency Under Wide PV Module Voltage and Load Range

Jong-Pil Lee, Byung-Duk Min, Tae-Jin Kim, Dong-Wook Yoo, and Ji-Yoon Yoo, Member, IEEE

Abstract

In this paper, a novel topology for a photovoltaic (PV)dc/dc converter that can dramatically reduce the power rating andincrease the efficiency of a PV system by analyzing PV modulecharacteristics is proposed. Based on the analysis, in the proposedtopology, only 30.7% power of the total PV system is neededfor a dc/dc converter. Furthermore, the dc/dc converter efficiencycurve is flat under wide PV module voltage and all load ranges.In particular, the converter efficiency at the lower duty rangeis dramatically improved. The total PV system is implementedfor a 250-kW PV power conditioning system (PCS). This systemhas only three dc/dc converters with a 25-kW power rating. It isonly one-third of the total PV PCS power. The 25-kW prototypePV dc/dc converter is introduced to experimentally verify theproposed topology. In addition, an experimental result shows thatthe proposed topology exhibits a good performance.Index Terms—DC/DC full-bridge converter, photovoltaic (PV)power conditioning system (PCS), voltage balance control, zerovoltageswitching (ZVS).