Optimization of a photovoltaic pumping system based on the optimal control theory

This paper suggests how an optimal operation of a photovoltaic pumping system based on an induction motor driving a centrifugal pump can be realized. The optimization problem consists in maximizing the daily pumped water quantity via the optimization of the motor efficiency for every operation point...

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Bibliographic Details
Published in:Solar energy 2010-07, Vol.84 (7), p.1273-1283
Main Authors: Betka, A., Attali, A.
Format: Article
Language:English
Subjects:
A.c. Machines
ALGORITHMS
Applied sciences
Arrays
CENTRIFUGAL PUMPS
EFFICIENCY
Electrical engineering. Electrical power engineering
Electrical machines
Energy
ENERGY LOSSES
Equipments, installations and applications
Exact sciences and technology
Flux
Induction motors
LQR
MINIMIZATION
Motors
Natural energy
OPERATION
OPTIMAL CONTROL
OPTIMIZATION
Optimization algorithms
Photovoltaic
Photovoltaic cells
Photovoltaic conversion
PHOTOVOLTAIC POWER SUPPLIES
PUMPING
Pumps
Regulation and control
Regulators
SIMULATION
Solar cells
SOLAR ENERGY
WATER
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Summary:This paper suggests how an optimal operation of a photovoltaic pumping system based on an induction motor driving a centrifugal pump can be realized. The optimization problem consists in maximizing the daily pumped water quantity via the optimization of the motor efficiency for every operation point. The proposed structure allows at the same time the minimization the machine losses, the field oriented control and the maximum power tracking of the photovoltaic array. This will be attained based on multi-input and multi-output optimal regulator theory. The effectiveness of the proposed algorithm is described by simulation and the obtained results are compared to those of a system working with a constant air gap flux.
ISSN:0038-092X
1471-1257
DOI:10.1016/j.solener.2010.04.004