ABSTRACT
Modeling of solar photovoltaic cell is an essential requirement in the computations involved in solar photovoltaic power systems. Some metaheuristic algorithms are used for determining the cell parameters in the literature, however, more investigation is required with reference to varying solar irradiation and temperature to improve the accuracy of the models. Hence, this paper proposes firefly algorithm for identification of the cell parameters accurate enough to construct the cell characteristics under varying solar irradiation and temperature conditions. Experimental results obtained at standard irradiation and temperature of 1000 W/m2, 25°C, and at other irradiation levels such as 80 0 W/m2 and 600 W/m2, temperature levels such as 40°C and 50°C were presented along with simulated values. The value of series resistance, shunt resistance and diode ideality factor for temperatures from 20°C to 60°C and irradiation of 400 W/m2 to 1000 W/m2 are computed using this proposed method. A comparison of the proposed method with other researchers at irradiation of 1000, 800, and 600 W/m2 and 25°C was provided. The results of implementation show that there is a good agreement between computed values and data sheet values. The proposed method will definitely be useful for large scale solar photovoltaic designers, researchers, simulators.
Symbols
βDegree of attractiveness
φFunction of Rseries, Rshunt and α
αIdeality factor
βoInitial attractiveness
Egband-gap energy of the semiconductor (eV)
Gactual irradiation (W/m2)
Gnsolar irradiation at STC (W/m2)
Idiodediode current (A)
Impcurrent at maximum power (A)
Imp,nnominal current at maximum power (A)
Ioreverse saturation current (A)
Io,nnominal saturation current (A)
Iphotophotocurrent (A)
IPVphotovoltaic output current (A)
Iscshort circuit current (A)
Isc,nnominal short circuit current (A)
KBoltzmann constant
kitemperature coefficient of short circuit current
kvtemperature coefficient of open circuit voltage
NEnot evaluated
Pmpmaximum power point (W)
qelectron charge
rpqdistance between two fireflies
Rseriesseries resistance (Ω)
Rshuntshunt resistance (Ω)
TCell temperature (oC)
TnCell temperature at STC (oC)
Vdiodediode voltage (V)
Vmpvoltage at maximum power (V)
Vmp,nnominal voltage at maximum power (V)
Vocopen circuit voltage (V)
Voc,nnominal open circuit voltage (V)
VPVphotovoltaic output current (A)
Xpposition of firefly, p
Xqposition of firefly, q
γabsorption coefficient
φlowerlower bounds of PV cell parameters
φupperlower bounds of PV cell parameters
Additional information
Notes on contributors
Rajkumar K
Rajkumar, K, obtained his Ph.D. degree in Electrical Engineering from Anna University, Chennai, India in the year 2018 . He is a member of Institution of Engineers, India. He has more than 15 years of teaching experience and he is presently working as an Associate Professor in EEE department of Saranathan College of Engineering, Tiruchirappalli, India. His areas of interests are power converters, renewable energy systems, artificial intelligence and electromagnetic interferences in power converter systems.
Kevin Ark Kumar
Kevin Ark Kumar obtained his Ph.D. degree in Electrical and Electronics Engineering from National Institute of Technology, Tiruchirappalli, India in the year 2016 . He is a Chartered Engineer in India and BEE certified Energy Manager in India. He joined Bharat Heavy Electricals Limited (BHEL), Tiruchirappalli, India in 2008 where he is currently a Manager. His areas of interests are power electronics, solar photovoltaic systems, programmable logic controllers and industrial automation systems.