A New Sensorless Hybrid MPPT Algorithm Based on Fractional Short-Circuit Current Measurement and P&O MPPT

This paper presents a new maximum power point tracking (MPPT) method for photovoltaic (PV) systems. The proposed method improves the working of the conventional perturb and observe (P&O) method in changing environmental conditions by using the fractional short-circuit current (FSCC) method. It t...

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Bibliographic Details
Published in:IEEE transactions on sustainable energy 2015-10, Vol.6 (4), p.1426-1434
Main Authors: Sher, Hadeed Ahmed, Murtaza, Ali Faisal, Noman, Abdullah, Addoweesh, Khaled E., Al-Haddad, Kamal, Chiaberge, Marcello
Format: Article
Language:English
Subjects:
Algorithm design and analysis
Current measurement
Efficiency
hybrid MPPT
Maximum power point trackers
maximum power point tracking (MPPT)
modeling and simulation
photovoltaic (PV)
Photovoltaic systems
Power capacitors
Power system simulation
Short-circuit currents
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Summary:This paper presents a new maximum power point tracking (MPPT) method for photovoltaic (PV) systems. The proposed method improves the working of the conventional perturb and observe (P&O) method in changing environmental conditions by using the fractional short-circuit current (FSCC) method. It takes the initial operating point of a PV system by using the short-circuit current method and later shifts to the conventional P&O technique. The advantage of having this two-stage algorithm is rapid tracking under changing environmental conditions. In addition, this scheme offers low-power oscillations around MPP and, therefore, more power harvesting compared with the common P&O method. The proposed MPPT decides intelligently about the moment of measuring short-circuit current and is, therefore, an irradiance sensorless scheme. The proposed method is validated with computer software simulation followed by a dSPACE DS1104-based experimental setup. A buck-boost dc-dc converter is used for simulation and experimental confirmation. Furthermore, the reliability of the proposed method is also calculated. The results show that the proposed MPPT technique works satisfactorily under given environmental scenarios.
ISSN:1949-3029
1949-3037
DOI:10.1109/TSTE.2015.2438781