Fast and precise global maximum power point tracking techniques for photovoltaic system

Abstract

The multiple power peaks obtained in the power-voltage (P-V) curve of a photovoltaic string under partially shaded condition results in a complicated maximum power point tracking (MPPT) process. Under this condition, the conventional MPPT methods are not acknowledged as they result in false and slow tracking. In this study three novel global MPPT (GMPPT) methods have been proposed and validated. These are named as large and small duty step (LSDS), large and mutable duty step (LMDS) and fast and intelligent GMPPT (FI-GMPPT). The LSDS method sweeps almost the entire P-V curve using a combination of LSDS. Small duty steps are used in predefined areas near all local maximum power points of the P-V curve. LMDS is a further improved method, which uses a combination of LMDSs. The FI-GMPPT is an advance true GMPPT method which limits the area to be swept during the search process. This results in a further reduction in sweep time. In this method, the unnecessary area is skipped during the sweep process. The improved performance of the projected methods has been demonstrated and validated using MATLAB/SIMULINK and hardware implementation.

Solar photovoltaic‐interfaced shunt active power filter implementation for power quality enhancement in grid‐connected systems

“…The many methods of maximum power point tracking (MPPT) are employed and extract the maximum amount of power. 7 A research study analyzes the similarities and contrasts between the perturb and observe-based (P&O) and the incremental conductance (INC) approaches. Several different sophisticated MPPT algorithms can be used in instances with partial shading that is published in the literature.…”

“…Several different sophisticated MPPT algorithms can be used in instances with partial shading that is published in the literature. 3,7,8 This manuscript considers a constant PV irradiance and an enhanced INC (EINC)-based approach is employed to generate the appropriate switching signals for a step-up converter to carry MPPT. PV is the leading RES; however, interfacing it with a shunt active power filter (SAPF) in the power grid to inject electrical power into the grid will minimize the harmonic current present on the source side and compensate present in load reactive power.…”

“…Power output from PV systems is contingent on the irradiation level, temperature, and load. The many methods of maximum power point tracking (MPPT) are employed and extract the maximum amount of power 7 …”

“…A research study analyzes the similarities and contrasts between the perturb and observe‐based (P&O) and the incremental conductance (INC) approaches. Several different sophisticated MPPT algorithms can be used in instances with partial shading that is published in the literature 3,7,8 . This manuscript considers a constant PV irradiance and an enhanced INC (EINC)‐based approach is employed to generate the appropriate switching signals for a step‐up converter to carry MPPT.…”

A Firework-Based GMPPT with Variable Sampling Time for PV Systems

“…Furthermore, when PV panels are partially shaded, instead of an MPP, there are multiple MPPs. erefore, conventional Maximum Power Point Tracking (MPPT) algorithms such as Incremental conductance (INC), Perturb and Observe (P&O), and Ripple Current Control (RCC) [2][3][4][5][6] get trapped into local MPPs when Partial Shading condition (PSC) occurs. In fact, these methods are effective in uniform irradiance.…”