A Novel Power Converter Topology for Electrostatic Precipitators

In this paper, we introduced an improved transformer-based parallel-resonant converter, suitable for high voltage, high power dc loads. The resonant capacitors are connected in parallel with diodes of the high voltage rectifier, thus restraining dv/dt stress in high voltage circuits. The LC tank res...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2016-01, Vol.31 (1), p.152-164
Main Authors: Vukosavic, Slobodan N., Peric, Ljiljana S., Susic, Stanimir D.
Format: Article
Language:English
Subjects:
Capacitors
Circuits
dc-dc power converters
Diodes
Electric currents
Electrostatic precipitators
High voltages
Insulated gate bipolar transistors
Power supply
Rectifiers
Resonant frequencies
resonant inverters
Stress
Switched-mode power supply
Switches
Switching
Tanks
Topology
Transformers
Voltage control
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Summary:In this paper, we introduced an improved transformer-based parallel-resonant converter, suitable for high voltage, high power dc loads. The resonant capacitors are connected in parallel with diodes of the high voltage rectifier, thus restraining dv/dt stress in high voltage circuits. The LC tank resonant frequency is well beyond the switching frequency, reducing in this way the VA rating of LC components. With rated load, the output current of the IGBT bridge is equal to zero at switching instants, and the switching losses are very low. Proposed subresonant circuit requires lower primary current for the given output power and it has reduced IGBT losses. Experimental setup delivers 79 kW with an efficiency of 96.78%. The paper explains the switching states of the devised topology, and provides the guidelines for designing the power transformer, the LC tank and controls. Analytical prediction of the performance curves is verified both in laboratory and by the field tests with an electrostatic precipitator plant.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2015.2405471