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Effect of source phase difference on static transfer switch performance

Mokhtari, H ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.1109/TPWRD.2006.883004
  3. Publisher: 2007
  4. Abstract:
  5. A thyristor-based static transfer switch (STS) provides a continuous supply for a voltage sensitive load through fast transfer between two sources when the main source does not meet load voltage requirements. This paper investigates the impact of phase difference between the corresponding voltages of the two sources on the load transfer performance achieved by an STS. The studies are performed on the IEEE benchmark STS-1 system using the power system computer-aided design/ electromagnetic transient dc simulation software. The studies indicate that the impact of phase difference on the STS load transfer time is insignificant when the sensitive load is a passive (e.g., RL) load. However, if the load can operate in a regenerative mode (e.g., a motor load), the effect of phase difference on the transfer time is noticeable. The studies show that a phase difference of 25° can increase the load transfer time by about 2 ms. © 2007 IEEE
  6. Keywords:
  7. Computer aided design ; Electric power systems ; Power quality ; Thyristors ; Transients ; Varactors ; Load transfer ; Phase difference ; Static transfer switch ; Voltage sensitve load ; Electric switches
  8. Source: IEEE Transactions on Power Delivery ; Volume 22, Issue 2 , 2007 , Pages 1125-1131 ; 08858977 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/4141138