Header menu link for other important links
X
Two-channel control of three-phase inverters for distortion reduction
Panappakkam Arumugam Janakiraman
Published in
2013
Volume: 6
   
Issue: 1
Pages: 192 - 201
Abstract
A new two-phase, independent control strategy for three-phase three-wire static inverters to reduce unbalance in output voltage is proposed. The three-phase voltage and current signals are processed by the ideal Clarke transform block to yield two single-phase signals, which contain information regarding unbalance and harmonics which may be present in the three-phase signals. If the two single-phase voltage signals could be controlled so that they become equal in magnitude with a phase shift of 90o (ideal alpha beta signals), then the corresponding terminal three-phase voltage signals would become balanced. Singlephase observers are employed to control the fundamental components in the two identical d-q frames created. Simultaneously, when the harmonics are eliminated in the two single-phase channels, the corresponding three-phase voltage signals would become distortion free. Feed-forward compensation can be carried out using the equivalent series-impedance parameters, estimated on-line using a simple identification algorithm. This procedure is not sensitive to frequency and can take care of the voltage drop in the distribution transformer. The simulation and experimental results for a field programmable gate array (FPGA) controlled 60 V table top inverter fabricated in the laboratory are provided. © The Institution of Engineering and Technology 2013.
About the journal
JournalIET Power Electronics
ISSN17554535
Open AccessNo
Concepts (13)
  •  related image
    DISTORTION REDUCTION
  •  related image
    Distribution transformer
  •  related image
    FEED-FORWARD COMPENSATION
  •  related image
    FUNDAMENTAL COMPONENT
  •  related image
    IDENTIFICATION ALGORITHMS
  •  related image
    Three-phase inverter
  •  related image
    THREE-PHASE THREE-WIRE
  •  related image
    THREE-PHASE VOLTAGES
  •  related image
    Algorithms
  •  related image
    Electric transformers
  •  related image
    Field programmable gate arrays (fpga)
  •  related image
    Voltage measurement
  •  related image
    Electric inverters