Browsing by Author "Hojabri, Mojgan"

Now showing 1 - 2 of 2

Citation Count: Humada, A.M...et al. "A Proposed Method of Photovoltaic Solar Array Configuration Under Different Partial Shadow Conditions", Advanced Materials Research, Vol 933, pp. 307-311, (2014).
A Proposed Method of Photovoltaic Solar Array Configuration Under Different Partial Shadow Conditions
(Trans Tech Publications LTD, 2014) Humada, Ali Mahmood; Hojabri, Mojgan; Mohamed, Mortaza B.; Herwan Bin Sulaiman, Mohd; Dakheel, Taha Hamad
The benefit of improving the efficiency of photovoltaic (PV) solar system has come into view because of increasing the demand for electricity, especially in the urban areas. However, these PV solar systems are vulnerable to the mismatch operating conditions. Under such conditions, the performance of solar cells has decreased rapidly since the nonuniform insolation hitting the cells and with different values. Then this leads to cause rapidly decreasing in the output power value and maximum power point, beside to hot spot points that may be occurring in the solar cell which finally leads to damage these cells. This paper proposes an optimal connection of substrings with different value of shadow conditions, based on a thorough configuration that can significantly reduce that nonuniform condition loss. The refinement over existing photovoltaic (PV) solar array interconnections is proven by extensive simulation results by using MATLAB SIMULINK
Modeling of Photovoltaic Solar Array Under Different Levels of Partial Shadow Conditions
(IEEE, 2014) Humada, Ali Mahmood; Samsuri, Fahmi B.; Hojabri, Mojgan; Mohamed, Mortaza B.; Bin Sulaiman, Mohd Herwan; Dakheel, Taha Hamad
Different methods of configuration have been formulated regarding photovoltaic solar power by employing several techniques. This has been done because of the varying conditions so that the loss of power can be minimized. The main factor which decreases energy output of the photovoltaic PV solar systems is partial shadowing. The way the energy output of partially shadowed arrays varies with the system configuration used, has been studied extensively. A huge degree of disorder still exists, particularly with respect to the best modularity grade for these systems. There are two distinct sub-divisions in the systems implemented in the reconfiguration mechanism: reconfigurable solar arrays, and a switching matrix to do a reconfiguration. Using different methods, the proportions of shadowing obstructions were noted to allow for calculation of the likely shadowing losses. The outcomes of this paper on modeling and monitoring are used to evaluate the photovoltaic system with respect to shadowing losses with different levels and their reliance on the system configuration are selected. It has been found that power loss because of varying conditions is majorly due to the decrease in radiance occurring on the photovoltaic array and can be avoided through selecting the suitable configuration and connection. The simulation results show that the output characteristics of the simulator presented better results with that proposed model.