NDLI: Single-phase boost DC-link integrated cascaded multilevel inverter for PV applications

Content Provider	IET Digital Library
Author	Babu, Sambhani Madhu Narasimharaju, Beeramangalla Lakshminarasaiah
Abstract	This study presents a new boost DC-link integrated multilevel inverter (BDIMLI) topology for single-phase stand-alone photovoltaic applications. The BDIMLI is realised by the integration of two two-level boost DC-link converters (TBDCs) with a hybrid H-bridge inverter using symmetrical voltage sources. Conventional cascaded multilevel inverters require a large number of isolated DC source and circuit components. On the other side, switched capacitor multilevel inverter topologies require less number of sources and components, but need bulky capacitors. The proposed TBDC units charge the capacitors to the desired voltage with the high switching frequency, hence require less capacitance and component count. The proposed topology with proper selection of capacitor voltage levels can produce 9-, 11- and 13-level outputs without altering any circuit components. Besides, the proposed topology produces low-frequency common-mode voltage. The comprehensive analysis of BDIMLI in comparison with recent multilevel inverter topologies is presented. An experimental prototype of BDIMLI is built and its dynamic behaviour with different load conditions is presented for both 9- and 13-level operations.
Starting Page	2086
Ending Page	2095
Page Count	10
ISSN	17554535
Volume Number	13
e-ISSN	17554543
Issue Number	Issue 10, Aug (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/13/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2019.1460
Journal	IET Power Electronics
Publisher Date	2020-03-31
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	13-level Operations BDIMLI Bridge Circuit Bulky Capacitor Capacitance Capacitor Voltage Levels Circuit Component Common-mode Voltage Component Count Desired Voltage High Switching Frequency Hybrid H-bridge Inverter Invertors Isolated DC Source Multilevel Inverter Topology Other Power Apparatus And Electric Machine Photovoltaic Power System Power Capacitor Power Electronics Power Supply PV Application Single-phase Boost DC-link Integrated Cascaded Multilevel Inverter Single-phase Stand-alone Photovoltaic Application Solar Power Stations Supervisory Circuit Switched Capacitor Multilevel Inverter Topology Switching Converter Symmetrical Voltage Source Two-level Boost DC-link Converter
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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