Abstract
Photovoltaic generators are almost always associated with some control and power electronics. Even in the case of a direct connection between a solar array and a battery, a non-return diode is needed. Generally, more complex power electronic converters are needed in order to adapt the electrical frequency and voltage level to the planned use. In addition, the rational use of photovoltaic generators is possible only in association with power electronic converters in order to adjust the voltage of the photovoltaic array to the maximum power point independently of the output voltage of the system. Power electronic converters associated to photovoltaic generators have to verify constraints on quality of energy supplied (low level of harmonics), electromagnetic perturbations (low level of EMC) and security.
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- <g>:
-
Mean value of a quantity g
- C :
-
Value of a capacitance
- C pv :
-
Input capacitance of a converter connected to photovoltaic array
- f :
-
Internal frequency of the converter
- i :
-
Instantaneous value of a current
- I :
-
Rms value of the current
- k :
-
Ratio between input and output voltages of a converter
- koff, kon:
-
Constants used for commutation losses estimation
- L :
-
Value of an inductance
- p :
-
Instantaneous value of a power
- P :
-
Active power (mean power on a period)
- P cap :
-
Mean power dissipated during commutations due to stray capacitances
- P ind :
-
Mean power dissipated during commutations due to stray inductances
- p loss :
-
Instantaneous value of a power dissipated as heat
- P loss :
-
Mean value of a power dissipated as heat
- P nom :
-
Nominal power of the converter
- P on :
-
Mean power of commutation losses related to transient from OFF to ON states
- P off :
-
Mean power of commutation losses related to transient from ON to OFF states
- P Q :
-
Mean power of commutation losses related to recovery charge of nearby components
- Q :
-
Value of an electric charge
- R diff :
-
Differential resistance
- T :
-
Internal period of the converter
- t on :
-
Time of variation of electrical quantities when going from OFF to ON states
- t off :
-
Time of variation of electrical quantities when going from ON to OFF states
- u :
-
Instantaneous value of a voltage
- U in :
-
Input voltage of a converter
- U in nom :
-
Nominal input voltage of a converter
- U thr :
-
Threshold voltage
- α :
-
Duty cycle of a converter
- η eur :
-
European efficiency.
- η x :
-
efficiency for an operating point at x percent of its nominal power
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© 2012 Springer-Verlag London Limited
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Rekioua, D., Matagne, E. (2012). Power Electronics Modeling. In: Optimization of Photovoltaic Power Systems. Green Energy and Technology. Springer, London. https://doi.org/10.1007/978-1-4471-2403-0_3
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DOI: https://doi.org/10.1007/978-1-4471-2403-0_3
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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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