Abstract
Renewable energy is high on international agendas. Currently, grid-connected photovoltaic systems are a popular technology to convert solar energy into electricity. Control of power injected into the grid, maximum power point, high efficiency, and low total harmonic distortion of the currents injected into the grid are the requirements for inverter connection into the grid. Consequently, the performance of the inverters connected to the grid depends largely on the control strategy applied. In this paper the simulation and design of grid connected three phase photovoltaic system using Matlab/Simulink has examined. The proposed system consists photovoltaic panels, boost and inverter the PV system convert the sun irradiation into direct current, thereafter we have used a boost to track the maximum power point of the PV system, three-phase inverter and LC output filter. A VOC control strategy based on the phase shifting of the inverter output voltage with respect to the grid voltage. The proposed control strategy requires few hardware and computational resources. As a result, the inverter implementation is simple, and it becomes an attractive solution for low power grid connected applications.
Highlights
In recent years, the use of renewable energy resources in Algeria instead of pollutant fossil fuels has increased
When connected to a power network, the PV systems must meet stringent power quality requirements set by the utility including low total harmonic distortion (THD) and fast dynamic response [10]
We have studied and simulated a grid-connected power system .The system is composed of PV arrays, DC/DC boost, a three level inverter, a LC filter and a three phase grid
Summary
The use of renewable energy resources in Algeria instead of pollutant fossil fuels has increased. The principal component for connecting renewable energy sources to the grid is the power electronics interface This interface has two main functions: conversion of direct current power to alternative current power for the grid connection and extracting the maximum power from the PV modules. When connected to a power network, the PV systems must meet stringent power quality requirements set by the utility including low total harmonic distortion (THD) and fast dynamic response [10] In this regard, we have studied and simulated a grid-connected power system .The system is composed of PV arrays, DC/DC boost, a three level inverter, a LC filter and a three phase grid. It is constituted of a light generated current source, a series resistance, and a parallel diode [2]. When the number of cells in series is Ns, and the number of cells in parallel is Np, the relationship between the output current and voltage is given by:
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