Power Losses Reduction of Solar PV Systems Under Partial Shading Conditions Using Re-Allocation of PV Module-Fixed Electrical Connections

Abstract

The paper gives a review of the investigation, which is being imported under different shading scenarios on the solar photovoltaic (PV) array arrangements. Under non-uniform irradiations, the authors pursue voluminous interpretation to scrutinize the mismatch power losses in PV array systems. In addition to power, the partial shading also reveals non-linearity along with multiple maximum power points (MPP) on performance curves i.e. power-voltage (P-V) and current-voltage (I-V). The inspection of the optimal layout of PV modules during the study helps us to extract maximum power and reduce the number of peaks, when arranged in an array under partial shading conditions (PSCs). In the vicinity of PV array configurations such as series-parallel (SP), honey-comb (HC), bridge-link (BL), total cross-tied (TCT), and hybrid series-parallel-Total cross-tied (SP-TCT), bridge link-honey comb (BL-HC), and bridge link-total cross-tied (BL-TCT) are considered to investigate the performance under shadowing conditions. Moreover, Latin square (LS) puzzle is introduced to reconfigure the PV array and extensive comprehensive comparison with conventional is presented and entitled as "LS-TCT" configuration. The MATLAB/Simulink environment helps in modelling all the considered PV array configurations. The recommended LS-TCT configuration is turned out to be superior among all configurations during PSCs in terms of location of global maximum power point (GMPP), minimized power losses (PL) and improved fill factor (FF) To show the superiority of proposed Shape-do-Ku (SPDK) puzzle based configuration, an extensive comparison is shown with conventional TCT and LS-TCT, Su-do-Ku (SDK) puzzle based configurations under new shading pattern-4. In addition, the experimental study is performed to validate the results obtained during MATLAB/Simulink study under similar shading scenarios.

Archives of Electrical Engineering

“…In Formula (7), 𝑃 MPP𝑁 _𝑖 represents the maximum power of a single-cell under illumination. In the second stage, when the output current 𝐼 ∈ [0, 𝐼 SC_𝑆 ], all the cells work together, and each bypass diode that is connected at both ends of the occluded cell is in the non-conduction state.…”

“…In [6], the L-shaped propagated array configuration method with a new dynamic reconfiguration algorithm has been proposed for enhancing the energy conversion under partial shading conditions, it alleviates the mismatch loss by evenly distributing partial shadows over the PV array. In [7], a method is proposed to reduce the power loss of solar photovoltaic systems which is under partial shadow conditions by using Re-Allocation of PV module-fixed electrical connections. In [8], the author studied four different system configurations, the derivation for the explicit expression of mean time to system failure, steady-state availability and cost-benefit analysis were performed.…”

Investigation of Small-Scale Photovoltaic Systems for Optimum Performance under Partial Shading Conditions

“…In addition, a new array configuration was presented. Re-allocation of a PV module-fixed electrical connection was introduced in [38] where a new proposed "Shape-do-ku" puzzle was presented and simulated for a (4 × 4) system.…”

Optimizing PV Array Performance: Comparative Study of Shading Mitigation Techniques and Row-Constrained Swapping

“…By enabling power generation even in the presence of shading, the TCT topology leads to higher power generation compared to traditional configurations [12]. It also helps to mitigate mismatch effects, improving the fill factor and reducing power losses [13].…”