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The key drivers for Maximum Power Point Tracking (MPPT) solutions in photovoltaic (PV) power plants are independency from solar panels, fast tracking of irradiance and temperature variations, and efficiency of conversion capacity. In the most available MPPT solutions, some issues such as high implementation burden and performance degradation during abrupt changes have not been sufficiently investigated...
In this paper, the single-stage Maximum Power Point Tracking (MPPT) control strategy for the Aalborg photovoltaic inverter is presented. Aalborg inverter has many advantages, such as high efficiency, wide range of input voltage, minimum voltage drop of the filtering inductors, etc. Nevertheless, it is essentially a “half-bridge” inverter with two input sources, where one source works in MPPT mode,...
In order to realize maximum power output of photovoltaics (PV), reduce line losses, and decrease abandoned solar energy during weak irradiance, a new medium voltage grid-connected PV system structure based on cascaded converters was proposed in this paper. A transformerless cascade step-up structure, instead of applying line-frequency step-up transformer, is proposed to connect PV directly to the...
This research presents a Maximum Power Point Tracking (MPPT) algorithm for a solar photovoltaic (PV) power station which is constructed based on modified circuit topology of the Modular Multilevel Converter (MMC). The proposed MPPT is featured with Optimized Finite-Control-Set Model Predictive Control (FCS-MPC) to provide continuous extraction of maximum solar energy. The estimation-based approach...
In the context of the increasing energy demand, renewable energy sources such as solar irradiation represent a much cheaper alternative for electrical energy production. The efficiency of solar energy conversion is influenced by photovoltaic cell performance and by power processing system. The power processing systems are designed to maximize the generated electrical power based on maximum power point...
The quasi-Z-source inverter (qZSI) in a photovoltaic (PV) generation system (PGS) has been very popular among researchers due to its ability to boost the PV voltage with its single-stage topology. In comparison to the conventional two-stage inverter, the qZSI comes with lower cost and higher efficiency. So far, research was focused on different qZSI topologies and their control methods. Not much attention...
This paper proposes a new maximum power point tracking (MPPT) scheme, based on perturb and observe concept, for a single stage PV water pump system working effectively under various environmental conditions. The selection of frequency step size is an important parameter for single stage solar water pump system. Larger step size may lead to a sudden drop in DC link voltage due to oscillations around...
In photovoltaic (PV) systems, a wide variety of power converter topologies and PV configurations have been developed in order to increase the system efficiency. Traditionally, grid-connected PV systems use one or two conversion stages. The single conversion stage is mainly used for large-scale PV systems working with only a DC-AC converter. Whereas, for small and medium-scale, two conversion stages...
In the recent years growing interest has been given to photovoltaic (PV) microinverters. Sub-modular optimization of PV panels where the junction-box of the panel is removed and each sub-modules is connected to an individual DC-DC converter realizing independent MPPT is one promising solution especially for systems subject to partial shading. In this paper, individual flyback DC-DC converters are...
Most of the large-scale PV power plants are based on central inverters, in which the PV panels are concentrated in single or few MPPTs and connected to the grid through three-phase inverters. Although its high conversion efficiency, extracting the total available power from an association of a large number of PV panels represents an issue in these systems. The irregular shading effects added to the...
This paper presents a novel photovoltaic (PV) based three-phase three-level grid-interactive inverter. The proposed system consist of a DC/DC converter, and a three-phase three-level inverter. In order to ensure maximum power point tracking, incremental conductance (IC) technique is used. In addition, to meet international standards for all operating modes, three-phase three-level inverter has been...
One alternative for the processing of energy acquired by photovoltaic panels is the use of phase-controlled inverters associated with multi-pulse autotransformers, which is nothing more than a dual system for multi-pulse rectifiers. This converter has advantages related to robustness, low maintenance, reliability and low cost. Another important feature is that the use of transformers with specific...
This paper proposes a PV fed Flyback based DC-AC inverter with maximum power point tracking. While designing a power electronics interface for solar power extraction the main concern should be about the better utilization of energy. For better utilization, solar energy should be utilized maximum and the energy conversion should be efficient reducing the converter losses. In the proposed Flyback inverter...
A control strategy for grid integrated photovoltaic (PV) system is presented in this paper. To capture the maximum available power from PV panels, an Incremental conductance(IC) method is implemented. Since the power generated from the PV array is DC, a voltage source inverter (VSI) with its independent active and reactive power control is implemented to transfer the generated power to the grid. The...
This work presents a comparison of ripple correlation control maximum power point tracking (MPPT) technique and the modified version of the same MPPT applied to single-phase, single-stage, grid-connected photovoltaic (PV) system, as the technique is fast and suitable for fast changing environmental conditions. Both the techniques are compared on the basis of the time taken to reach (track) the MPP,...
As the availability of solar energy varies widely with time and with different atmospheric condition, the cascaded multilevel inverters generates distorted output ac voltage and current if the generated PV voltages of each PV module are unequal. This paper proposes a novel space vector modulation technique for the single-phase cascaded H-bridge multilevel inverter (CHBMLI) to generate a balanced output...
This paper presents a Photovoltaic Active Power Line Conditioner, a device designed to extract the maximum power of a photovoltaic (PV) system and to compensate the nonlinear and unbalanced loads of the electrical power systems. The grid-connected PV systems require DC-DC and DC-AC power converters to maximize the generated PV power and to inject an AC current to the network. In this work, a neuro-fuzzy...
In this study, LabVIEW and MATLAB/Simulink programs has used together to develop a simulator of grid connected photovoltaic system which has the maximum power point tracking ability. System consists of a photovoltaic module model, a DC/DC boost converter, a voltage source inverter, a maximum power point tracking algorithm and current controller. The photovoltaic panel and maximum power point tracking...
Recent concerns about environmental issues led to global energy policies oriented to new energy sources less polluting and cheaper. Energy produced by photovoltaic technology is clean and renewable. The actual problem is that currently the price of photovoltaic systems is relatively high. Research in this field is now focused on improving the efficiency of electricity production using photovoltaic...
This paper presents modeling and simulation of isolated single phase supply system comprises of photovoltaic system tracked for its Maximum Power Point (MPP) and single-phase multi-level Voltage Source Inverter (VSI). The Maximum Power Point Tracking (MPPT) based on Perturb-and-Observe (P&O) technique is proposed for extracting maximum power from the photovoltaic module. Furthermore, single-phase...
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