Voltage Synthesis Using Dual Virtual Quadrature Sources-A New Concept in AC Power Conversion

Controlling an ac voltage often involves changing the amplitude, phase, and/or harmonic content of the voltage. This can require the addition of voltage at or around the zero crossing of the available ac voltage. Synthesis of this additional voltage normally requires an ac or dc source (or energy st...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2008-11, Vol.23 (6), p.3004-3013
Main Authors: Divan, D.M., Sastry, J.
Format: Article
Language:English
Subjects:
AC-AC power conversion
Active control
Active filters
Applied sciences
Control systems
Controllers
Current control
Devices
Direct energy conversion and energy accumulation
Electric currents
Electric potential
Electrical engineering. Electrical power engineering
Electrical power engineering
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Energy accumulation
Exact sciences and technology
Matrix converters
Phase shift
power control
Power conversion
Power electronics, power supplies
Power harmonic filters
Pulse width modulation inverters
Quadratures
Reactive power
Synthesis
Transformers
Transformers and inductors
Voltage
Voltage control
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Summary:Controlling an ac voltage often involves changing the amplitude, phase, and/or harmonic content of the voltage. This can require the addition of voltage at or around the zero crossing of the available ac voltage. Synthesis of this additional voltage normally requires an ac or dc source (or energy storage element) from which the desired voltage can be synthesized using pulsewidth modulation techniques. This paper proposes a novel concept wherein dual virtual quadrature sources are used to synthesize the required additional voltage. This is seen to result in simple low-cost ac converters that are robust, have minimal component count, and can realize phase shift and/or harmonic control without requiring multiple sources or energy-storage elements. The approach is seen to have simple implementation and can realize potentially useful devices such as controllable transformers and inverter-less active filters.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2008.2005036