Assessment of Perturb and Observe MPPT Algorithm Implementation Techniques for PV Pumping Applications

The energy utilization efficiency of commercial photovoltaic (PV) pumping systems can be significantly improved by employing simple perturb and observe (P&O) maximum power point tracking algorithms. Two such P&O implementation techniques, reference voltage perturbation and direct duty ratio...

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Vydáno v:IEEE transactions on sustainable energy Ročník 3; číslo 1; s. 21 - 33
Hlavní autoři: Elgendy, Mohammed A., Zahawi, Bashar, Atkinson, David J.
Médium: Journal Article
Jazyk:angličtina
Vydáno: IEEE 01.01.2012
Témata:
Arrays
DC-DC power conversion
Generators
maximum power point tracking (MPPT)
Noise
photovoltaic (PV) power systems
photovoltaic (PV) pumping
stability
Stability analysis
Steady-state
Transfer functions
Voltage control
ISSN:1949-3029, 1949-3037
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Popis
Shrnutí:The energy utilization efficiency of commercial photovoltaic (PV) pumping systems can be significantly improved by employing simple perturb and observe (P&O) maximum power point tracking algorithms. Two such P&O implementation techniques, reference voltage perturbation and direct duty ratio perturbation, are commonly utilized in the literature but no clear criteria for the suitable choice of method or algorithm parameters have been presented. This paper presents a detailed theoretical and experimental comparison of the two P&O implementation techniques on the basis of system stability, performance characteristics, and energy utilization for standalone PV pumping systems. The influence of algorithm parameters on system behavior is investigated and the various advantages and drawbacks of each technique are identified for different weather conditions. Practical results obtained using a 1080-Wp PV array connected to a 1-kW permanent magnet dc motor-centrifugal pump set show very good agreement with the theoretical analysis and numerical simulations.
ISSN:1949-3029
1949-3037
DOI:10.1109/TSTE.2011.2168245