Nt1310 Unit 4 Pv System

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The simulation study of the complete system is carried out by using MATLAB/SIMULINK. For this simulation, four PV module in a series connection mode is considered. Each PV module consists of three submodules. A multiwinding flyback converter is connected across each PV module. Fig. 7(a) shows the P-V charactristc cunve of the PV array (with bypass diode) without using the integrated converter. The figure shows multiple power peaks with maximum power nearly 500W. The shading pattern of the PV array is presented in Table-1. Fig. 7(b) shows the characteristic curve by integrating the converter across each PV module. The P-V characteristic curve exhibits a single peak point. The peak power is nearly 670W. As compared to conventional PV system more than 150W power can be extracted from the PV system. Each submodule of the PV module is subjected different solar insolation. Fig. 8(a ) shows the current of submodule of PV module-1. In this figure, submodule-3 generates less power as…show more content…
Fig. 9(a) shows the DC-link voltage across the DC-link capacitor of the PV array. The DC-link reference voltage corresponds to maximum power point of the PV array. Fig. 9(b) shows the power demand by the load, and power flows from the grid and PV system generated power. As the PV system generated power could not meet complete power demand of load, remainining power is supplied by the grid. At 1secocond the PV system switched from partially shaded condition to uniform solar insolation. Thus, at this point power supplied by the inverter and grid also varies. Fig. 10(a) shows the grid current which is fully sinusoidal. Fig. 10(b) shows the inverter output current. Fig. 11 shows the performance of system under reactive load condition. In this study, a 500VA reactive load is considered. The figure shows the complete reactive power is supplied by the inverter. Thus the power factor of the system is maintained nearly at
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