NDLI: Single phase nine level inverter using single DC source supported by capacitor voltage balancing algorithm

Content Provider	IET Digital Library
Author	Sekar, Rathinam Marimuthu Jayakumar, Dhanaraj Nelson Mylsamy, Kaliamoorthy Subramaniam, Umashankar Padmanaban, Sanjeevikumar
Abstract	This study introduces a new single phase nine-level inverter using two capacitors and a single DC source. Voltage imbalances in the capacitors are eliminated using two control algorithms namely charging algorithm and discharging algorithm. The charging algorithm is used to change the inverter switching states when the measured voltage across the capacitors is less than the prescribed value. Alternatively, if the voltage across the capacitors is greater than the set value, the discharging algorithm determines the switching pattern of the inverter switches. The proposed voltage balancing algorithm is very simple to implement and makes the proposed inverter attractive for industrial applications. An extensive comparison of the proposed inverter is made against other topologies proposed in the literature in terms of the components used. The proposed inverter is tested in both standalone and grid connected modes. The proposed inverter is simulated and implemented as a prototype in the laboratory. Experimental results obtained from the prototype confirm the high-quality transient performance of the proposed inverter in terms of its dc capacitor voltage balancing capability.
Starting Page	2319
Ending Page	2329
Page Count	11
ISSN	17554535
Volume Number	11
e-ISSN	17554543
Issue Number	Issue 14, Nov (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/11/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2018.5060
Journal	IET Power Electronics
Publisher Date	2018-09-21
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Capacitor Charging Algorithm Control Algorithm Control of Electric Power System Dc Capacitor Voltage Balancing Capability Discharging Algorithm Distributed Power Generation Inverter Attractive Inverter Switches Inverter Switching State Invertors Measured Voltage Power Capacitor Power Converter Power Electronics Power Grid Power Supplies to Apparatus Power Supply PWM Invertors Single DC Source Single Phase Nine Level Inverter Single Phase Nine-level Inverter Supervisory Circuit Switching Converter Voltage Balancing Algorithm Voltage Control Voltage Imbalances
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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