Optimal dynamic reconfiguration of large‐scale PV plant under partial shading conditions based on two reconfigurable stages

Abstract

Varying solar radiation on photovoltaic (PV) panels reduces the PV system's output and increases the mismatch losses. Several techniques have been proposed to solve the mismatch problem, for example, the reconfiguration technique of PV panels.Most of the reconfiguration techniques have been proposed for small systems because of the difficulty in applying to large systems as a large number of switches are required for such applications. In this paper, a new technique based on total-cross-tied (TCT) in two reconfigurable stages is proposed. In the first stage, the shading over the PV plant is dispersed by switching between arrays. In the second stage, the shade dispersion from the first stage is increased by optimizing between the columns. The number of switches and sensors were reduced by using genetic algorithm, thus reducing the system cost. To demonstrate the proposed new reconfiguration technique, four shaded cases were simulated and tested using MATLAB/SIMULINK. A comprehensive analysis of power-voltage (P-V) curves and row currents calculation was performed, for TCT configuration and the proposed new reconfiguration technique. Also, a comparative study on performance analysis, energy-saving, and income generation was carried out for each shading case. The comparative study of the four cases shows that the reconfiguration techniques proposed in two stages generate more power under partial shading conditions than TCT. Further research is needed to ensure the practicality of the switches needed to realize this technique.

A Review on Machine Learning Applications for Solar Plants

“…Researchers proposed a lot of rPV’s structures, including Honey Comb, Series Parallel, Total Cross Tied (TCT), etc. [ 127 , 128 , 129 , 130 , 131 , 132 , 133 , 134 , 135 , 136 , 137 , 138 , 139 ]. According to the articles [ 140 , 141 , 142 ], the last one generates more power in case of PS as compared to other structures.…”

“…In Table 12 , we summarize the ML models for rPV from studies [ 130 , 131 , 132 , 133 , 134 , 135 , 136 ].…”

Enhancing the power output of partially shaded PV array using column shift right‐left panel arrangement based array reconfiguration technique

“…16 Owing to its simplicity and easy implementation, single diode model based solar cell is considered for this work. 32 The essential components involved in PV modelling are: a current source, a diode and two resistors. The equivalent circuit of a single diode PV model is illustrated in below Figure 2.…”

“…Various modelling methods studied in the literature include single diode, double diode, and three diode models 16 . Owing to its simplicity and easy implementation, single diode model based solar cell is considered for this work 32 . The essential components involved in PV modelling are: a current source, a diode and two resistors.…”

Review on parameter estimation techniques of solar photovoltaic systems

“…2 Among many renewable energy resources, solar photovoltaic (PV) made prodigious contribution toward sustainable power generation. 3 This energy resource remains at an unprecedented height by generating 480 GW of power supplying 2.8% of the world's electrical demand approximately by the end of the year 2020. 4 Albeit solar energy is abundant, and leads the way in forefront 5 ; its growth is obstructed by factors such as partial shading, 6 intermittent nature, 7 high initial cost, 8 and expensive storage requirement.…”