INTERNATIONAL RESEARCH JOURNAL OF ENGINEERING AND TECHNOLOGY (IRJET)
E-ISSN: 2395-0056
VOLUME: 07 ISSUE: 08 | AUG 2020
P-ISSN: 2395-0072
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“Design and Analysis an Asymmetrical 11-Level Inverter for Photovoltaic Applications.” Priyanka Salwe1
Prof. Priyanka Dukare2
PG Student: Asst.Professor Department of Electrical Engineering Department of Electrical Engineering Abha Gaikwad Patil College of Engineering, Nagpur Abha Gaikwad Patil College of Engineering, Nagpur -------------------------------------------------------------------------------***-------------------------------------------------------------------------Abstract— Increasing demands of power conversion Advantages of the construction increases demands of technology encourages multilevel converters emerge as a smaller, efficient, rigid types of multilevel inverters in time, solution to overcome limitations at power ratings in resulting in reduced number of switches and maximizing conventional methods of power converters. This paper their potential in distributed power. As these are the discusses about a new asymmetrical construction of an 11trends in modern usage power conversion multilevel level inverter, despite the focus on the following design, inverter design. In response to the conventional limitations few comparisons of the conventional topological of inverters, this paper proposes a new asymmetrical 11construction will be stated. Limitations in conventional types topologies often deals with its complexity and level inverter design, simulated with MATLAB. It will be volume. It will be furthered mentioned how the stated the recommended practices for harmonic values by asymmetrical topology of the 11-level inverter design deals IEEE and could be considered how harmonic values in and overcome these limitations and reduce harmonic inverter design could be implemented in different types of distortions for grid-tied PV systems. The proposed applications. Even after implementing multilevel construction is designed and simulated by MATLAB topologies (e.g diode clamp, flying capacitor, isolated software. Analysis of Real-Time Simulation of the proposed power sources), the limits of the topology will cover design results in a THD value. around the number of switches used and switching Keywords— 11 Level Multilevel Inverter, Photovoltaic, PWM, operations that will affect effectiveness in further PV Swicthing Sequence, MATLAB. applications. The paper will also cover how the proposed I. INTRODUCTION 11-level inverter design would be capable to overcome conventional topology problems by the effective reduced Power electronics are the core of modern number of switches to achieve a high number of n-levels application conversion systems. The increasing demands to and how this design could be useful to further research in improve efficiency, usage flexibility leads to technical higher n-level applications to reduce harmonic values even challenges around the control method used and their lower. topologies. Multilevel inverters could overcome the power II. MULTILEVEL INVERTER CIRCUIT. ratings and handling limits by shared through ratings in the components of the switches. These converter trends A Multilevel Inverter is created [18] by cascading two are largely applied to renewable technologies and industry three-phase three-level inverters using the load appliances. As the output of the PV cells are DC, and after connection, with only one dc voltage source, that can maximizing the DC power output by the MPPT. DC power is operate as a seven-level inverter and naturally splits the converted to AC as a source for home and industrial power conversion into a higher-voltage lower-frequency appliances. Conventional constructions of inverters are inverter and a lower-voltage higher-frequency inverter. limited by their components power ratings. As a result, Two types of control: controlling the two three-level methods of multilevel conversion are used to share and inverters jointly and separately, are developed that distribute power collective through the components. Most included capacitor voltage balancing so that a dc source commonly known topologies are the flying capacitor and was needed for only one three-level inverter. A survey diode-clamp constructions. But as levels are increased presents different topologies, control strategies and these builds up volume, cost and number of switches. modulation techniques used by multilevel inverters. Asymmetrical design generally satisfies this objective and Regenerative and advanced topologies are also discussed. with the increased levels, harmonic distortions which Finally, applications and future developments are percentage nominal that are regulated by IEEE standards addressed. Cascaded multilevel inverter have evolved from in output power are reduced. a theoretical concept to real applications due to high degree of modularity, possibility of connecting directly to © 2020, IRJET
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