By Luis Castañer, Santiago Silvestre
Photovoltaics, the direct conversion of sunshine from the solar into electrical energy, is an more and more vital technique of disbursed energy iteration. The SPICE modelling software is sometimes utilized in the advance of electric and digital circuits. while utilized to the modelling of PV platforms it presents a method of knowing and comparing the functionality of sunlight cells and systems.
nearly all of books at present out there are dependent round dialogue of the sunlight telephone as semiconductor units instead of as a procedure to be modelled and utilized to real-world difficulties. Castaner and Silvestre supply a finished therapy of PV method expertise research. utilizing SPICE, the software of selection for circuits and electronics designers, this ebook highlights the expanding significance of modelling concepts within the quantitative research of PV structures. This distinct remedy offers either scholars engineers, with the skill to appreciate, overview and increase their very own PV modules and systems.
* offers a distinct, self-contained, consultant to the modelling and layout of PV systems
* provides a pragmatic, software orientated method of PV know-how, anything that's lacking from the present literature
* makes use of the commonly identified SPICE circuit-modelling device to examine and simulate the functionality of PV modules for the 1st time
* Written by way of revered and famous teachers within the box
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Additional info for Modelling Photovoltaic Systems Using PSpice
Example text
C) In amorphous silicon solar cells which are fabricated using a p i - n structure, the recombination current at the intrinsic layer is not an exponential function but a nonlinear function of the voltage and of the current. The effects of the series and shunt resistances and of the non-idealities are considered in Chapter 3. 1 Compare the quantum efficiency of a solar cell with an arbitrarily long base layer (assume 2 mm long) with that of the same solar cell having a base layer thickness of 170 pm and a base surface recombination velocity of 10000 c d s .
3 below. 3 PSpice Model for the Short-circuit Spectral Current Density The simplest PSpice model for the short-circuit spectral current density can be easily written using PWL sources to include the files of the three magnitudes depending on the wavelength: spectral irradiance, absorption coefficient and reflectance. In the examples shown below w e have assumed a constant value of the reflectance equal to 10% at all wavelengths. lib’ and m a access nodes from the outside: the value of the absorption coefficient at the internal node (1 I ) and the reference node (10).
A number of shunt resistive losses are identified, such as localized shorts at the emitter layer or perimeter shunts along cell borders are among the most common. This is represented generally by a lumped resistor, Rsh, in parallel with the intrinsic device. 52 ELECTRICALCHARACTERISTICSOF THE SOLAR CELL (c) Recombination Recombination at the space charge region of solar cells explains non-ohmic current paths in parallel with the intrinsic solar cell. This is relevant at low voltage bias and can be represented in an equivalent circuit by a second diode term with a saturation density current Joz, which is different from the saturation density current of the ideal solar cell diode, and a given ideality diode factor different to 1, it is most often assumed to equal 2.