Maximum Power Point Tracking for PV Array Under Partially Shaded Conditions

Abstract

This paper studies the maximum power point tracking (MPPT) methods under partially shaded conditions for a stand-alone PV array system. The rules for judging partially shaded conditions are presented and integrated into four MPPT methods. These methods are tested in real-time simulation environment, and their advantages and disadvantages are further analyzed. Matlab/Simulink/SimPowerSystems are used with RT-Lab for building the real-time simulation models and the MPPT controller for partially shaded conditions. Based on the simulation results, the MPPT methods integrated with judging rules for partially shaded conditions can track the maximum power point better than those without judging rules, elevating the usage efficiency of PV arrays.

AC/DC power decoupling in single-phase inverters

“…Reference source not found.. To get the highest possible power output this operating point needs to be tracked and for the inverter to constantly stay in that point. An MPP tracking algorithm is used to achieve this [3]. …”

Maximum power point tracking for PV systems under partial shading conditions using current sweeping

“…If the irradiation is not uniform, multiple peaks could easily occur on the power-voltage characteristic curve and all local searching algorithms [1][2][3][4][5][6][7] may be trapped in a local maximum which indirectly introduce a power loss. Recently, there are many MPPT algorithms [8][9][10][11][12][13][14] proposed to address the partial shading problems and these global searching techniques are based on the extension of perturb and observe method, particle swarm optimization (PSO), fuzzy logic and artificial neural networks (ANN). The problems with these algorithms are that they may introduce large power oscillations and are complicated to implement, especially for those artificial intelligent based MPPT algorithms.…”

Multicell Switched-Inductor/Switched-Capacitor Combined Active-Network Converters

“…While in other industrial applications, such as uninterruptible power supply, X-ray systems, TV-CRTs, high-intensity discharge lamps for automobile headlamps, high step-up voltage gain dc/dc power conversion is also required [2]- [4].…”