Power optimization of TCT configured PS-PV fields by forecasting the connection of modules

Solar photovoltaic (SPV) modules are connected in series and parallel to meet the load requirements in terms of voltage and current respectively. Thus, in large photovoltaic fields, the PV panels often get partially or completely shadowed by passing clouds, nearby buildings, poles, chimneys, shadow of nearby panels, trees etc. As a result, the output power received is less than the expected value. The output power of PV fields is not only depends on number of modules under partial shade but also dependent on array configuration (SP, TCT, BL, and HC etc.), shading pattern and location of shaded and non-shaded modules within the array. In this paper, TCT configured PV fields are investigated under partially shaded conditions. Based on the results obtained in terms of maximum output power, certain conclusions are drawn in terms of connection laws and implementation of these laws on large TCT configured PV field´s (4*4, 5*5) shows that the power losses can be decreased by connecting the shaded and non-shaded modules according to the derived connection laws and thus enhance power generation.