Abstract
This paper presents the effect of irradiance change in solar photovoltaic (PV) array interconnection schemes under partial shading conditions (PSCs) for optimal selection of PV interconnection schemes in order to extract maximum power (MP) from the PV array. A 4×4 PV array is considered to examine the well-known PV interconnection schemes under different shading scenarios at distinct irradiance conditions. Simulation studies and experimental verification are carried out by considering a 30 W PV panel to analyse the performance of the PV array under various dynamic conditions. Comprehensive analysis in terms of fill factor, output power and mismatching power loss is presented by considering different interconnection schemes under various shading scenarios and irradiance levels. From the simulation studies and experimental verification, it is observed that the irradiance magnitude has a significant impact on the PV power generation from array interconnection schemes under PSCs wherein the performance characteristics of the array interconnection schemes vary with the variation in irradiance levels. It is also identified that the irradiance factor needs to be considered as a design variable while selecting the optimal PV array interconnection schemes for maximum power extraction under PSCs.
Highlights
MOTIVATIONT HE rapidly diminishing non-renewable sources like oil, natural gas, coal, and other fossil fuels have led to an energy crisis and increased the energy gap between generation and demand [1]
A new shade dispersion scheme is presented Simulation study on PV interconnection schmes under partial shading conditions (PSCs) and faulty conditions is presented S, SP, HC configurations are analyzed S, P, SP configurations are analysed S, P, SP, HC, total cross-tied (TCT) configurations are analyzed S, P, SP, HC, TCT configurations are analyzed A new shade dispersion scheme is presented Presented a detailed classification of PV interconnection schemes A module integrated converter based TCT configuration of PV modules is presented Triple tied scheme is presented Mismatching power loss is analyzed in PV configurations
For this PSC at an irradiance of 100 W/m2 the S, P, SP, TCT, HC and bridge link (BL) schemes generate a maximum power of 356W, 371.9W, 263.8W, 287.6W, 273.1W and 278.4W respectively
Summary
T HE rapidly diminishing non-renewable sources like oil, natural gas, coal, and other fossil fuels have led to an energy crisis and increased the energy gap between generation and demand [1]. A new shade dispersion scheme is presented Simulation study on PV interconnection schmes under PSC and faulty conditions is presented S, SP, HC configurations are analyzed S, P, SP configurations are analysed S, P, SP, HC, TCT configurations are analyzed S, P, SP, HC, TCT configurations are analyzed A new shade dispersion scheme is presented Presented a detailed classification of PV interconnection schemes A module integrated converter based TCT configuration of PV modules is presented Triple tied scheme is presented Mismatching power loss is analyzed in PV configurations This analysis considers random irradiance levels under PSCs. A comparative study on S, SP and TCT configurations is given by M. This type of interconnection scheme has better performance than S, P and SP interconnection schemes in PSCs. The overall voltage, current and power of the PV array under this interconnection scheme can be given as in (18), (19) and (20) respectively.
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