Abstract
Photovoltaic pumping has become one of the most promising fields in photovoltaic applications. To achieve the most reliable and economical operation, more attention is paid to their design and their optimal use. Depending upon the intended application, the pumping system can be selected from surface, submersible or floating pumps type [147]. Submersible pumps remain underwater, surface pumps are mounted at water level at the vicinity of the well or, in the case of a floating pump, on top of the water. Pumps can be classified according to their operating modes. Mainly there are centrifugal and positive displacement pumps [147]. In the centrifugal pump, the rotation of an impeller forces water into the pipe. The water velocity and pressure depend on the available mechanical power at the rotating impeller and the total head. The displacement pump uses a piston or a screw to control the water flow. Compared to the centrifugal pump, the positive displacement pump presents a better efficiency under low power conditions.
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Abbreviations
- a(h), b(h), c(h), d(h):
-
Coefficients corresponding to the working total head
- a i , b i , c i and d i :
-
Constants which depend on the type of solar pumping system
- C i :
-
ith calculated value
- h :
-
Total head
- hh p.u:
-
Fundamental voltage value
- \( i_{a} \) :
-
Armature current
- (I sd I sq) (d, q):
-
Components of the stator current
- \( i_{F} \) :
-
Field current
- J :
-
Rotor and load moment of inertia
- J motAC :
-
Inertia of the AC motor
- Kh:
-
Harmonics to be minimized
- \( K_{m} \) :
-
Constant related to the design of the machine
- \( L_{F} \) :
-
Field winding inductance
- \( L_{a} \) :
-
Armature winding inductance
- M i :
-
ith measured value
- n :
-
Number of measurements
- P 9 :
-
Electrical power input of the motor pump
- p :
-
Pole pair number of the AC machine
- \( R_{a} \) :
-
Armature resistance
- \( R_{F} + R_{\rm adj} \) :
-
Total field resistance
- R m :
-
Core loss resistance (Ω)
- R s :
-
Stator resistance per phase (Ω)
- R r :
-
Equivalent rotor resistance per phase (Ω)
- \( T_{L} \) :
-
Load torque
- v :
-
Terminal voltage
- V a , V b and V c :
-
Phase voltages
- V s :
-
rms Motor voltage (V)
- (V sd, V sq) (d, q):
-
Components of the stator voltage
- X m :
-
Magnetizing reactance (Ω)
- X s :
-
Stator leakage reactance (Ω)
- X r :
-
Equivalent rotor leakage reactance (Ω)
- σ :
-
Leakage coefficient
- ϕ :
-
Flux per pole
- (ϕ sd, ϕ sq) (d, q):
-
Components of the stator flux
- ω :
-
Rotational speed of the rotor
- ω rAC :
-
AC motor velocity angular
- ω s :
-
Angular frequency of the supply (rd/s)
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© 2012 Springer-Verlag London Limited
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Rekioua, D., Matagne, E. (2012). Photovoltaic Pumping Systems. In: Optimization of Photovoltaic Power Systems. Green Energy and Technology. Springer, London. https://doi.org/10.1007/978-1-4471-2403-0_6
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DOI: https://doi.org/10.1007/978-1-4471-2403-0_6
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Publisher Name: Springer, London
Print ISBN: 978-1-4471-2348-4
Online ISBN: 978-1-4471-2403-0
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