Abstract
In this paper a control scheme for three phase seven level cascaded H-bridge inverter for grid tied PV system is presented. As power generation from PV depends on varing environmental conditions, for extractraction of maximum power from PV array, fuzzy MPPT controller is incorporated with each PV array. It gives fast and accurate response. To maintain the grid current sinusoidal under varying conditions, a digital PI controller scheme is adopted. A MATLAB/Simulink model is developed for this purpose and results are presented. At last THD analysis is carried out in order to validate the performance of the overall system. As discussed, with this control strategy the balanced grid current is obtained keeping THD values with in the specified range of IEEE-519 standard.
Highlights
IntroductionAmong these sources solar energy is the most emerging one [1, 2]
In recent year there is a huge demand of renewable energy sources instead of conventional one.Among these sources solar energy is the most emerging one [1, 2]
Among the various topologies developed [3] cascaded H-bridge multilevel inverter is gaining the popularity as in this configuration individual voltage control can be possible as each H-bridge is feed by isolated solar panel [4]
Summary
Among these sources solar energy is the most emerging one [1, 2] It does not need any fuel cost for maintenance or emit any noise becaming the most popular one. Among the various topologies developed [3] cascaded H-bridge multilevel inverter is gaining the popularity as in this configuration individual voltage control can be possible as each H-bridge is feed by isolated solar panel [4]. This configuration has the advantages of (a) less complexity (b) usage of less number of components (c) no usage of diodes or capacitors for clamping
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