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Research Papers

Development of a Quick Dynamic Response Maximum Power Point Tracking Algorithm for Off-Grid System With Adaptive Switching (On–Off) Control of dc/dc Converter

[+] Author and Article Information
M. Averbukh

Department of Solar Energy and Environmental Physics,
Albert Katz International School of Desert Studies,
Jacob Blaustein Institute for Desert Research,
Ben-Gurion University of the Negev,
Sede Boqer Campus, 84990 Israel

A. Uhananov

Shamoon College of Engineering,
SCE,
Basel/Bialik Sts, Beer-Sheva84100, Israel

R represents the inductor's resistance, equation series resistance of the panel and the load resistance, L and C represent the induction and capacitance of the boost circuit, accordingly.

Contributed by the Solar Energy Division of ASME for publication in the Journal of Solar Energy Engineering. Manuscript received December 3, 2011; final manuscript received June 1, 2012; published online November 21, 2012. Assoc. Editor: Santiago Silvestre.

J. Sol. Energy Eng 135(2), 021003 (Nov 21, 2012) (7 pages) Paper No: SOL-11-1268; doi: 10.1115/1.4007852 History: Received December 03, 2011; Revised June 01, 2012

This paper presents a new approach of Adaptive Search Control Method to perform maximum power point tracking (MPPT) in solar panels (SP). The suggested approach adapts the operation point (current I and voltage V) of the solar panel so quickly that it tracks MPP under the harshest environmental conditions by incorporating a flexible switching in a Boost dc/dc converter, which connects the photovoltaic (PV) panel to the load. The usage of a flexible switching control increases the dynamic response of MPPT and the efficiency of tracking. A dedicated simulink (matlab) model was developed for validation of the proposed MPPT method which was verified through multiple simulation conditions. Based on these results, the prototype system for evaluating the suggested method was developed and assembled. This prototype was developed on the base of a photonic integrated circuit (PIC) family microcontroller unit with an external circuit for accurate voltage and current measurements. The technical characteristics of the developed system (efficiency and tracking speed) have been verified experimentally with a 100 W c-Si solar panel under various environmental conditions. The results of measured and estimated MPPT efficiency were represented.

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Figures

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Fig. 1

Solar panel's PV characteristic under constant temperature and varying irradiance

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Fig. 2

Solar panel's PV characteristic under constant irradiance and varying temperature

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Fig. 3

Flow chart of the suggested algorithm

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Fig. 4

The suggested block diagram of MPPT system

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Fig. 5

Simulation results for specific set of values of MPPT model and solar

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Fig. 6

(a) The graph of the total circuit losses added with the power drop of operating point under the MPP of solar panel as a function of coil inductance and (b) MPPT's simulation efficiency versus theoretical efficiency

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Fig. 7

(a) The adaption of output power of MPPT system compare to the input power (MPP) versus time, (b) ripples of solar panel output parameters during control process: power, voltage and current, and (c) searching response of MPPT system to step changing of solar irradiation: Panel's electrical power and load power during the time

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Fig. 8

The experimental prototype of MPPT board

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