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Transformerless photovoltaic systems are one of the best options to connect a photovoltaic system to the electrical grid given their high efficiency, low cost, small size and low weight regarding their counterparts based on a transformer. In this paper a multilevel single-phase inverter is aimed to link a photovoltaic generator with the electrical grid with reduced common mode current. A sinusoidal...
In this paper, authors propose an advanced photovoltaic system based on the 15-Level PUC inverter. The proposed inverter has the advantage to operate with a single PV array while generating fifteen voltage levels. Even it is constituted from only eight switches and two capacitors; it can nevertheless offer a fifteen-level output voltage. In order to extract the maximum power from the PV panel, authors...
This paper presents the proposal of a three-phase current-source shunt active power filter (CS-SAPF) with photovoltaic grid interface. The proposed system combines the compensation of reactive power and harmonics with the injection of energy from a solar photovoltaic array into the electrical power grid. The proposed equipment presents the advantage of giving good use to the current-source inverter,...
The line commutated converter (LCC) is matured technology which is used for power conversion. The LCC is tied to a grid in which commutation of power devices (SCR) is achieved by grid voltage. In this paper, three phase LCC in an inverter mode is proposed for interfacing of solar photovoltaic (PV) array and ac grid. This topology does not require to make and maintain the synchronism between converter...
This work aims to design and assembly a characterization of solar panel using capacitive load. This device provides information that allows the user to increase the efficiency of power generation in photovoltaic systems. Detection of operation issues or abnormal conditions such as partial shading caused by dirt or objects can affect adversely the maximum power point. Simulation results were used to...
The z source inverter is a moderately modern power converter topology that has been established in the prose to exhibit voltage-buck and voltage-boost capability. In this proposed system z source theory can be applied to two-level inverters. Two level z source inverter receiving the power supply from photovoltaic system. Output voltage of z source inverter produce twice increased of applied input...
Small-scale photovoltaic (PV) systems commonly use single-phase grid-connected (GC) inverters to feed the generated power into the power grid. In this case the instantaneous GC inverter output power shows a 100 Hz fluctuation. However it is required to keep the instantaneous PV array output power as constant as possible to maximise the average PV array output power. Thus all GC inverters use an energy...
In grid-connected photovoltaic (PV) power stations, improving the life expectancy and long-term reliability of three-phase PV inverters is urgently needed to match the significantly higher lifetime of the PV modules. A key contribution towards such improvement is replacing the conventional electrolytic film capacitors inside the inverter with metallized polypropylene film ones. With more and more...
TMs paper presents a new sliding surface to control the average photovoltaic admittance to follow a reference provided by an external algorithm, and at the same time, to mitigate the oscillations in the bulk voltage. The sliding mode control convergence and stability are validated for the designed surface to ensure the same performance in all operation range. Finally, simulations are used to demonstrate...
As the power demand and power failure increases, non-conventional energy sources are used to provide constant load. In this paper a new system comprising of single ended primary inductor converter (SEPIC) integrated with PV array is proposed. In the present work a model of PV array is developed and is employed as input to the SEPIC. The modeling of the SEPIC converter is developed and the operating...
In this work, the utilization of a Photovoltaic (PV) array and a battery pack in parallel via a double input DC/DC converter including a coupled inductor is reported. The dynamic performance of this proposed hybrid energy system is analyzed in detail through the switching model created in MATLAB® Simulink® environment by using PLECS® power components under different solar irradiance and demanded load...
This paper presents a novel inverter topology that is applied to single-phase grid-connected photovoltaic systems. The proposed topology has an active decoupling function, which not only eliminates the double line frequency ripple power in the dc-link but also accepts large voltage ripple across the decoupling capacitor in order to reduce the requirement of the decoupling capacitance. Traditionally,...
In grid-connected photovoltaic (PV) power stations, improving the life expectancy and long-term reliability of three-phase PV inverters is urgently needed to match the significantly higher lifetime of the PV modules. A key contribution toward such improvement is replacing the conventional electrolytic film capacitors by metallized polypropylene film ones. This paper presents a detailed evaluation...
Although photovoltaic (PV) systems are generally based on Maximum Power Point Tracking (MPPT), many situations such as stand-alone systems or microgrids increasingly require the PV system to operate below maximum power. The problem here is that the power regulation becomes unstable when the MPP power is lower than the reference power as a result of a decrease in irradiance. This paper proposes a control...
Among Renewable Energy Sources, the solar energy represents an attractive alternative solution to traditional sources because is available everywhere; moreover, photovoltaic (PV) modules are nowadays becoming more and more attractive as the price per watt of the photovoltaic modules is decreasing. The output voltage furnished by a PV module is quite low; therefore, a series connection of different...
In an effort to utilize the solar energy effectively through power electronics converters (conditioners), a great deal of research is being carried out to meet the increasing demand for load. This paper proposes an experimental photovoltaic (PV) power conditioning system with line connection. The conditioner consists of a flying capacitors multi-cell inverter fed by a dc-dc boost converter. The boost...
A novel photovoltaic system based on T-inverter connected to a single-phase grid is proposed in this paper to reduce the number of semiconductor device, size and total cost of the system. T-inverter is a DC/AC converter composed of an H-bridge cell, a capacitor and a pulse transformer capable of controlling the output ac voltage and input dc voltage at any moment. T-inverter is proposed in this paper...
This paper presents a single-phase grid-connected photovoltaic power system with the capability of maximum power point tracking (MPPT) of photovoltaic (PV) array and reactive power compensation. This topology employs a boost converter to track the maximum power point of PV array and a dual flying capacitor multicell (DFCM) converter in order to connect to the grid. The proposed system can fulfill...
This paper presents photovoltaic (PV) grid-connected power conditioning systems based on Z-source inverter. Using Z-source network, the system can work within a range of PV array output voltage wider than that of the conventional boost converter. It allows the use of the shoot-through switching state for boosting the input voltage, compensates dead-time effect which causes serious output voltage distortions...
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