Multiple-Power-Sample Based P&O MPPT for Fast-Changing Irradiance Conditions for a Simple Implementation

Abstract

This article proposes an improved maximum power point tracking (MPPT) method that features a simple design, and improved efficiency in fast-changing irradiance conditions. The method uses three consecutive measurements and compares the power difference between each two consecutive samples, furthermore the voltage variation between the last two successive samples is observed. According to the obtained result of these comparisons, the algorithm applies the suitable action either increasing or decreasing the voltage. This simple concept allows easy implementation and reduces the implementation cost and calculation burden. Second, the method has a prompt tracking response during fast changes in solar irradiance (e.g., due to passing clouds). The proposed method is validated through experimental tests using solar irradiance profiles according to the EN50530 standard and is compared to the classical Perturb and Observe method. The experimental results show that the proposed MPPT effectively identifies the change in solar irradiance, and maintains high tracking efficiency even in fast-changing conditions. Index Terms-Efficiency, EN50530 standard, maximum power point tracking (MPPT), photovoltaic (PV) energy harvesting. I. INTRODUCTIONT HE integration of photovoltaic (PV) technologies, as a main source of power plants has been one of the important subjects of research during the past few decades. However, the fundamental issue with PV technology is that its power extraction characteristic is nonlinear and its maximum power point (MPP) is highly dependent on uncontrollable environmental conditions (solar irradiation and temperature) [1]. Hence,

Novel Global-MPPT Control Strategy Considering the Variation in the Photovoltaic Module Output Power and Loads for Solar Power Systems

“…The P&O algorithm [16,36] is widely used by researchers due to its low cost and easy implementation. This algorithm is based on the PV-M P pv-m -V pv-m characteristic curve.…”

“…The photovoltaic module (PV-M) used in SPG is susceptible to the effects of temperature (T) and irradiance level (G), thereby reducing system efficiency [15,16]. Therefore, this study focused on the analysis and research of the SPG maximum power point (MPP).…”

Hybrid islanding detection technique for single‐phase grid‐connected photovoltaic multi‐inverter systems

“…3. The first one is the MPPT controller which uses perturb and observe method controller to regulate the reference of the DC voltage signal of the inverter to get a DC voltage according to the maximum power from the PV array [60, 61]. Second, the V DC regulator determines the required active current (see i d in Fig.…”

Global maximum power point tracking in partially shaded PV systems using plant reproduction algorithm

“…However, traditional P & O method suffers from poor convergence time, PV power during tracking as well as sustained oscillations even after GMMP has reached. Hence, several improved P&O methods have been developed over the years to mitigate these drawbacks [5][6][7]. However, these schemes are usually employed under uniform irradiance conditions.…”