Design, Operation, and Control of S3 Inverter for Single-Phase Microgrid Applications

A single-phase voltage source inverter with a front-end dc-dc conversion stage followed by a synchronized push-pull configuration operating at a desired fundamental frequency (FF) is presented. The duty cycle of the dc-dc conversion stage is varied in the form of a unidirectional sine wave to produc...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2015-09, Vol.62 (9), p.5569-5577
Main Authors: Reddy, B. Dastagiri, Selvan, M. P., Moorthi, S.
Format: Article
Language:English
Subjects:
Analog control
Circuit faults
Conversion
DC-DC converter
DC-DC power converters
Electric potential
Frequency conversion
Hardware
High frequencies
Inverters
Line frequency transformer
Micro-grid
Power semiconductor switches
Power supply
Push-pull configuration
S3 inverter
Semiconductors
Sine waves
Switches
Topology
Voltage
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Description
Summary:A single-phase voltage source inverter with a front-end dc-dc conversion stage followed by a synchronized push-pull configuration operating at a desired fundamental frequency (FF) is presented. The duty cycle of the dc-dc conversion stage is varied in the form of a unidirectional sine wave to produce a similar output voltage across the dc-link capacitor. The unidirectional voltage is made into an alternating voltage by the synchronized push-pull configuration. This inverter employs three semiconductor switches, in which one is operating at a high frequency and the rest are operating at an FF. Hence, it is named as the S3 inverter. Furthermore, simple and cost-effective analog circuits are presented for the generation of switching pulses and the control of the amount of power fed to the grid. The hardware prototype of the S3 inverter has been built in a laboratory, and its performance during the stand-alone and grid-connected modes of operation is validated.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2015.2414898