Optimized Maximum Power Point Tracker for fast changing environmental conditions

Abstract

Abstract-This paper presents a high-performance maximum power point tracker (MPPT) optimized for fast cloudy conditions, e.g., rapidly changing irradiation on the photovoltaic panels. The rapidly changing conditions are tracked by an optimized hillclimbing MPPT method called dP -P&O. This algorithm separates the effects of the irradiation change from the effect of the tracker's perturbation and uses this information to optimize the tracking according to the irradiation change. The knowledge of the direction of the irradiation change enables the MPPT to use different optimized tracking schemes for the different cases of increasing, decreasing, or steady irradiance. When the irradiance is changing rapidly this strategy leads to faster and better tracking, while in steady-state conditions it leads to lower oscillations around the MPP. The simulations and experimental results show that the proposed dP -P&O MPPT provides a quick and accurate tracking even in very fast changing environmental conditions.

Survey on MPPT Techniques in Photovoltaic Solar Energy Systems

“…This error causes the tracking speed of the P&O method to decrease. The hillclimbing [3] and incremental conductance (INC) [4] methods use the characteristics of the power and voltage of the solar cell to determine the maximum power point. The maximum power point occurs when the slope of the powervoltage curve of the solar cell becomes zero.…”

Control of single-phase islanded PV/battery minigrids based on power-line signaling

“…There are many different options ( [15], [16], [17]) to track this point but despite the fact that this method seems easy to implement, the model used in this paper has been well developed because it is able to find the operating point with changes in the temperature of the PV panel and oscillations in the irradiation due to possible shadows or other circumstances. Fig.…”

<b>Impact of modified perturb and observe control on MPPT of PV/battery fed three - port DC‐DC converter

“…Hence a modification is introduced in the existing P&O algorithm to avoid or reduce the drift by including the data of the change in the current (ΔI). The solution to avoid the drift problem is given by applying a constraint on perturbation step size (Esram & Chapman, 2007;Sera, Teodorescu, Hantschel, & Knoll, 2008, Piegari & Rizzo, 2010Killi & Samanta, 2015).…”