Abstract
To date, the grid-connected solar photovoltaic (PV) system has drawn consideration from researchers and academicians due to the speedy improvement and the declining price of solar panels. The proficiency and dependability of a grid integrated PV system rest mainly on the power conversion unit and the proper controlling mechanism. This paper introduces a novel asymmetric hexagonal-shaped fifteen-level inverter designed to feed a grid-integrated solar PV system. First, it aims to reduce the number of components and thereby decrease the installation space and cost of the multilevel inverter. Moreover, it has a low total blocking voltage (TBV) and total device rating (TDR) and uses few switching devices for generating per level of output voltage. The proposed topology utilizes only eight switching devices for generating fifteen levels at the output, which is lower than conventional multilevel inverter topologies. Here, a low-frequency modulation scheme using the half-height (HH) method generates switching pulses to minimize the complexity. The proposed multilevel inverter topology is also validated through the simulations in the MATLAB SIMULINK environment. The proposed inverter need for filters is illustrated according to different grid codes for integrating PV systems to the grid.
Highlights
Global energy demand is increasing day by day due to the strong global economic growth and higher heating and cooling demand
The blocking appears across a switch when it is reverse biased, and the total blocking voltage is the sum of the individual blocking voltages required for each switch of a topology
For designing a multilevel inverter mum. topology, This low value will ensure that requirements cost, weight and size the it is imperative that thethe total device ratingfor ofthe a multilevel inverter is at of a minimum
Summary
Global energy demand is increasing day by day due to the strong global economic growth and higher heating and cooling demand. The first invented inverter topology applied only to low-level systems, producing For solving these problems, in 1970, the first multilevel inverter was proposed for genersquare voltage renewable energy sourcesdesigned [4]. For developing a fifteen-level output voltage with optimal switching devices and voltage sources, a novel multilevel inverter topology was presented by Rohit in 2018 Though this proposed topology uses only seventeen components, this number can be further reduced [14]. The proposed topology has the merit of a lesser component requirement: It consists of eight switching devices, three voltage sources, and a diode for generating fifteen output levels. This topology can be extended to n number of levels. It reduces the maximum number of active switches for generating per level output voltage
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