Page 190 - Advances in Renewable Energies and Power Technologies

CHAPTER

DMPPT PV System:

Modeling and Control 5

Techniques

Marco Balato, Luigi Costanzo, Massimo Vitelli
Department of Industrial and Information Engineering, Universita ` degli Studi della Campania
“Luigi Vanvitelli”, Aversa, Italy

CHAPTER OUTLINE
1. Maximum Power Point Tracking of a Photovoltaic Source..................................... 163
2. Central Maximum Power Point Tracking and Distributed Maximum Power Point
Tracking ............................................................................................................ 164
3. Necessity of Joint Adoption of Distributed Maximum Power Point Tracking and
Central Maximum Power Point Tracking: Hybrid Maximum Power Point Tracking.... 167
3.1 HMPPTS Technique ............................................................................ 171
3.1.1 Modified P&O Distributed Maximum Power Point Tracking
Technique........................................................................................ 171
3.1.2 CMPPTS Technique ......................................................................... 175
3.2 HMPPTF Technique ............................................................................ 180
3.2.1 Exact and Approximate IeV and PeV Characteristics of LSCPVUs ..... 180
3.2.2 Distributed Maximum Power Point Tracking and Central
Maximum Power Point Tracking Based on Fast Estimate of Maximum
Power Voltages................................................................................. 190
3.2.3 Numerical Simulations Concerning Hybrid Maximum Power Point
Tracking Techniques ........................................................................ 195
References .............................................................................................................201

1. MAXIMUM POWER POINT TRACKING OF A PHOTOVOLTAIC
SOURCE
It is well known that a photovoltaic (PV) array under uniform irradiance exhibits a
power versus voltage (PeV) characteristic with a unique point, called the Maximum
Power Point (MPP), where the array provides maximum output power [1]. Because
the PeV characteristic of a PVarray and hence its MPP change as a consequence of
the variation of the irradiance level and of the panels’ temperature (which is in turn
function of the irradiance level, of the ambient temperature, of the efficiency of the
heat exchange mechanism and of the operating point of the panels), it is necessary to
track continuously the MPP to maximize the power output from a PV system, for a
163
Advances in Renewable Energies and Power Technologies. https://doi.org/10.1016/B978-0-12-812959-3.00005-8
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