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Application of the unified power quality conditioner for mitigating electric arc furnace disturbances

Esfandiari, A ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.2316/Journal.203.2008.4.203-3677
  3. Publisher: 2008
  4. Abstract:
  5. This paper discusses the application of unified power quality conditioner (UPQC) for improving power quality of a system supplying an electric arc furnace (EAF). The UPQC includes combined series and shunt active filters sharing a common DC link. It is used to mitigate voltage disturbances and compensate for reactive power, harmonics and interharmonics. A novel control strategy for the UPQC is presented. As voltages at the point of common coupling contain low-frequency interharmonics, conventional methods cannot be used for extracting voltage reference signals. In the proposed method, voltage references are extracted using a phase-locked loop to generate sinusoidal waveforms. Current compensating signals are detected based on the current vector mapping on a rotating reference frame constituted by the instantaneous phase voltages. A real system is simulated using a three-phase EAF model. Simulation results are presented to verify the control strategy and to assess the performance of UPQC in improving power quality
  6. Keywords:
  7. Compensating signal ; Control strategies ; Conventional methods ; Current vectors ; DC links ; Electric arc furnace ; Harmonics and interharmonics ; Improving power ; Inter-harmonics ; Low frequency ; Phase voltage ; Point of common coupling ; Power quality improvement ; Real systems ; Rotating reference frame ; Shunt active filters ; Simulation result ; Sinusoidal waveforms ; Unified power quality conditioners ; Voltage disturbances ; Voltage reference ; Active filters ; Cavity resonators ; Electric arcs ; Electric furnace process ; Electric furnaces ; Furnaces ; Harmonic analysis ; Signal processing ; Steel metallurgy ; Voltage measurement ; Power quality
  8. Source: International Journal of Power and Energy Systems ; Volume 28, Issue 4 , 2008 , Pages 363-371 ; 10783466 (ISSN)
  9. URL: https://www.actapress.com/Abstract.aspx?paperId=34440