Investigations on performance enhancement of rooftop pv system using dynamic reconfiguration
摘要
Recent days in India, rooftop photovoltaic (PV) systems have had a significant contribution to India’s renewable energy. Efficiency of PV systems, especially on rooftops, is limited by partial shading conditions. Among the numerous ways to improve the efficiency of PV systems, the configuration of PV arrays plays a major role. In this article, various configurations of PV arrays, such as conventional and hybrid configuration topologies, are analysed. Many solutions have been reported in the literature to reduce partial shading effects. Nevertheless, the solutions that have been reported may not be able to adequately enhance the maximum capacity. Therefore, a promising strategy based on reconfiguration strategies, that is, reconfiguring the PV modules within the PV array to boost maximum power at a higher level, is needed to compensate for these power losses. These tactics fall into two categories: static and dynamic reconfiguration methods. This paper proposes the best–worst algorithm of dynamic reconfiguration techniques for Triple-Tied-Cross-Linked (TTCL) configuration. The performance of the proposed reconfigured TTCL is validated with various PV array configurations with and without reconfiguration techniques. Various performance indicators have been used to evaluate these topologies: fill factor, thermal equivalent voltage, performance ratio, mismatch power loss, reduction of global maxima, global maxima, and total local peaks. A 9 × 9 PV array of 81 Waaree Solar modules, each rated at 370 W, is suggested for MATLAB/Simulink study. The proposed reconfiguration minimises the number of local peaks in the PV curve, which reduces complications in tracking maximum power. In the meantime, reconfiguration of shaded panels enriches maximum power. The proposed TTCL reconfigured array offered improved power extraction at 13.83% compared to the TTCL array.