On the Input Resistance of a Reconfigurable Switched Capacitor DC-DC Converter-Based Maximum Power Point Tracker of a Photovoltaic Source

被引：38

作者：

Peter, Pradeep K. ^{[1
]}

Agarwal, Vivek ^{[2
]}

机构：

[1] Indian Space Res Org, Satellite Ctr, Power Elect Div, Bangalore 560017, Karnataka, India

[2] Indian Inst Technol, Dept Elect Engn, Bombay 400076, Maharashtra, India

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2012年 / 27卷 / 12期

关键词：

DC-DC power converters; frequency modulation (FM); photovoltaic (PV) systems; pulse-width modulation (PWM); switched capacitor (SC) circuits; DESIGN;

D O I：

10.1109/TPEL.2012.2192452

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The use of a switched capacitor (SC) dc-dc converter for tracking the maximum power point (MPP) of a photovoltaic (PV) array with the possibility of partial shading is described. The SC converter topology can be reconfigured to maximize conversion efficiency depending on the solar radiation and load. A new control scheme for MPP tracking based on tuning the input resistance (RIN) of the SC converter MPP tracker with a battery tied load to match the output resistance of the array at MPP is proposed. RIN of the SC converter MPP tracker is studied extensively. The limits of RIN and its sensitivity to Pulse-width modulation (PWM), frequency modulation (FM), and circuit parameters of the SC converter are analyzed. Based on the sensitivity analysis, the proposed control scheme consists of an inner FM loop for fine control, an outer PWM loop for coarse control, and a provision to increase the dynamic range of RIN with adjustments of certain converter circuit parameters. A hardware prototype of a 10-W SC converter-based MPP tracker is built. Experimental measurements on the hardware model confirm the theoretical analysis. An algorithm to implement the MPP tracking control scheme is also tested.

引用

页码：4880 / 4893

页数：14

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