A distortion-free phase-locked loop system for FACTS and power electronic controllers

Karimi Ghartemani, M ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.1016/j.epsr.2006.09.013
  3. Publisher: 2007
  4. Abstract:
  5. This paper presents a single-phase phase-locked loop (PLL) system which is primarily free from the double-frequency ripples from which the conventional PLL system suffers. The proposed PLL is then extended to reject the harmonic components from the input signal and to estimate the phase-angle and frequency of the distorted input signal with no error. Three units of the proposed PLL can be used in three-phase power systems, such as FACTS and HVDC converters, to estimate the phase-angles of the individual phases with no double-frequency ripples and without sensitivity to the presence of harmonics and inter-harmonics. This makes the proposed PLL unique and desirable for applications which demand highly accurate estimation of the phase-angle(s) and frequency. © 2006 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Electric control equipment ; Electric converters ; Electric distortion ; Error analysis ; Frequency estimation ; Harmonic analysis ; HVDC power transmission ; Power electronics ; Synchronization ; Double frequency ripples ; FACTS ; Interharmonics ; Phase angle detection ; Phase locked loops
  8. Source: Electric Power Systems Research ; Volume 77, Issue 8 , 2007 , Pages 1095-1100 ; 03787796 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S037877960600229X?via%3Dihub