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Under partial shading condition or imbalanced temperature distribution, the power-voltage characteristic curve of photovoltaic (PV) array exhibits complicated multiple peaks. Traditional maximum power point tracking (MPPT) method is usually easy to trap into local extreme power point. To solve this issue, this paper proposes a novel MPPT method using quantum-behaved particle swarm optimization (QPSO)...
Aiming at the contradiction between the speed and precision of traditional photovoltaic MPPT (maximum power point tracking) algorithm, an algorithm based on CVT (constant voltage tracking) and variable step size hysteresis comparison method is proposed. It avoids the problem of false judgment which is easy to appear in the perturbation and observation method, and the oscillation in the vicinity of...
In this paper, a maximum power point tracking (MPPT) control system for thermoelectric generation is proposed. The MPPT algorithm is based on the open-circuit voltage method. Model equations of the thermoelectric generation circuit including a thermoelectric generation module (TEM), a DC-DC converter and an electric load are explained. The MPPT control system based on operator theory is designed for...
Three methods used for tracking maximum power point, known as fuzzy logic, ripple correlation control and pilot cell, are compared to deduce the most efficient in terms of rapidity and power oscillations during extraction of maximum energy of an E20-327 Sunpower panel. Simulation has showed that fuzzy logic method is more advantageous compared with the two other techniques because of its rapidity...
In this paper a detailed description of control performed in an Interleaved Boost converter is presented. This is the coupling between an array of solar panels and a DC microgrid. By getting together control and power electronics theory, a converter linear model was developed. It was inserted into a loop of a programmable control implemented to obtain a stable environment which tends to look for a...
The paper presents the results of simulation and study of operating modes of a photovoltaic power plant with the maximum power point tracking controller. A number of search methods are considered: constant voltage method, open voltage method, short circuit method, method of observing perturbations and incremental conductance method. A complex model of the photovoltaic power plant with the controller...
VSAS (Variable Structure Automatic Systems) control methodology is applied to clarify the rationale behind Maximum Power Point Tracking and get the best optimization algorithm. Two algorithms are developed the Modified and Enhanced Perturb and Observe Algorithm (MEPO) the Robust Unified Control Algorithm (RUCA). The maximum power is computed online using a very simple algorithm. Compared to the other...
This Harnessing energy from the abundant and free sunlight is now a days a hot-topic among the research community. The availability of cheap solar modules has made it possible to harvest solar energy with better efficiency. The nature of solar modules is nonlinear and therefore the process of impedance matching is essential. The proper impedance matching ensures extraction of the maximum power from...
This paper deals with the use of large-size Photovoltaic (PV) units as providers of the reactive power compensation ancillary service. To do this, a suitable control scheme has been developed, which is based on an advanced control theory, called FeedBack Linearization (FBL), widely employed in the robotics field but still not so popular in power systems engineering. This allows to regulate both the...
In order to increase the output efficiency of a PV energy system, it has to be forced to operate near the maximum power point (MPP). A photovoltaic (PV) system, including Maximum Power Point Tracking (MPPT) controller that extracts the maximum possible output power from the solar panel is built. Simulation and experimental results show that the proposed system, making use of several MPPT control algorithms...
Utilization of solar energy is one important action to decelerate the observed climate change and to ensure the availability of energy in the future. Reliable solar-energy systems composing of solar arrays and their interfacing converters are of prime importance but known to have certain operational constraints causing reliability problems. The paper investigates a real current-fed converter for the...
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