Abstract
Partial shading is the commonly encountered scenario of building roof-top based PV arrays that mainly occur due to the shadow of the neighbouring buildings and clouds resulting in unexpected losses and deteriorated system performance. The arrays are connected in various configurations to enhance the system performance during shading. In this paper, various conventional and hybrid interconnection configurations based on series-parallel (SP), bridge-linked (BL), and total cross tied (TCT) topologies of the roof-top PV arrays are examined under various partial shading scenarios caused by the neighbouring building and clouds. The investigation is done for a $9\times 9$ roof-top array in MATLAB/Simulink environment considering various comparison parameters. It has been found that during 1.23%, 7.40%, 11.11%, 17.75%, 18.51%%, 22.22%, and 24.69% of total array shading, SP generated the maximum power whereas, during 30.86%, 61.72% shading, TCT has the generated only a slightly higher power as compared to SP. Hence, the study concludes that the configurations have a puny effect on the power generation of the arrays during uneven shading patterns caused by buildings and clouds.
Highlights
The demand for solar photovoltaic (PV) generation is continuously rising at a faster pace due to higher source availability, low maintenance and higher reliability.the higher setup cost and larger land requirement of the PV system has inspired the consumers to opt for a roof-top based system to reduce extra land cost and higher initial cost [1]
A PV module mainly comprises of a number of cells that accepted interconnection configuration where several are semiconductors to generate electricity from solar modules are connected in the series to increase the system irradiance (G) by mean of the photoelectric effect represented voltage output forming string and similar strings are by a current source with a parallel diode (D) and some connected in parallel for higher current output resulting in resistances
The conventional module interconnection configurations i.e. Series Parallel (SP), BL, and total cross tied (TCT) are studied under various real-time based shading scenarios that are mainly caused by the nearby buildings
Summary
The demand for solar photovoltaic (PV) generation is continuously rising at a faster pace due to higher source availability, low maintenance and higher reliability. These scenarios can reduce the overall performance of the array by either generating very low power output or creating a hotspot among the shaded modules whose long-term existence leads to physical damage to the PV module [3]. Bridge-linked (BL) and total cross tied (TCT) are conventionally widely accepted for effective shading mitigation in PV arrays that require extra wires and knots connected across the modules to disperse the current throughout the array [18]. The performance of the configurations has been studied in terms of powervoltage (P~V) characteristics curves, power generation, mismatch losses, power losses, tracking losses, number of peaks in the P~V curves, operational efficiency, conversion efficiency, extra wires and knots requirement
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
