Maximum power point tracking in PV systems based on adaptive control and sliding mode control
Journal Title: Revista Facultad de Ingeniería-Universidad de Antioquia - Year 2015, Vol 1, Issue 75
Abstract
Photovoltaic (PV) systems are commonly controlled using PI or PID structures, which cannot ensure global stability and a constant settling time. Therefore, the optimization algorithms, e.g. Perturb and Observe (P&O), are designed using the highest settling time in the operating range, which produces a slow tracking of the maximum power point (MPP) for the largest part of the operation range, introducing dynamic power losses to the system. This paper proposes to combine an adaptive controller and a sliding mode current controller (SMCC) to guarantee global stability and a constant settling time for any operation condition, which enable to increase the generated power in comparison with PI and PID controllers. The SMCC enables to mitigate the system perturbations and guarantee global stability, while the adaptive controller defines the reference of the SMCC to ensure a constant settling time. The design of the new control structure is supported by mathematical analyses and simulations made in Matlab®, where the robustness of the system is validated.
Authors and Affiliations
Paula Andrea Ortiz-Valencia, Luz A. Trejos-Grisales, Carlos A. Ramos-Paja
Chitosan/hydroxyapatite scaffolds for tissue engineering manufacturing method effect comparison
The regeneration of bone is one of the main challenges of modern medicine because many diseases including trauma and tumor can cause bone defects. Tissue engineering (TE) is a promising approach to cure these bone diseas...
Influence of meteorology and source variation on airborne Pm10 levels in a high relief tropical Andean city
Atmospheric particulate matter (PM10) was evaluated with meteorology, mixing height and source variation over a two year period (January 2010 to December 2012) in the densely populated tropical Andean city of Manizales....
Reconfiguration of photovoltaic arrays based on genetic algorithm
This paper describes a Genetic Algorithm (GA) implementation devoted to the calculation of reconfiguration patterns for Photovoltaic Arrays (PVs). The proposed solution is compared with the classical Brute Force (BF) app...
Comparison of molecular models of carbon monoxide for calculation of vapor-liquid equilibrium
There are a number of molecular models for carbon monoxide developed from different experimental measurements. This paper aims to compare the results that several of these models produced in the calculation of vapor-liqu...
Implication of the inferior vena cava in the generation of reentry in the pectinate muscles
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia and it is a significant risk factor for stroke and other morbidities if left untreated. The most dangerous and complex arrhythmias are the result o...