Electronic Science and Technology ›› 2021, Vol. 34 ›› Issue (11): 55-61.doi: 10.16180/j.cnki.issn1007-7820.2021.11.009

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Research on Flexible Switching Controller Based on UPFC

WANG Yumei,LI Yaowei   

  1. School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003,China
  • Received:2020-06-28 Online:2021-11-15 Published:2021-11-16
  • Supported by:
    Henan Province Science and Technology Research Project(112102210004)


The busbar switch directly performs rigid closing during the power system switching operation, and a large inrush current will be generated in the ring network, which seriously threatens the safe operation of the power system. Thus, a flexible switching controller based on UPFC is designed. By analyzing the topology structure and working principle of the unified power flow controller, the topology structure of the controller suitable for the busbar switch tripping is proposed. The parallel structure of the tripping controller is designed to adjust the voltage amplitude during closing, and the controller series structure is designed to adjust the voltage phase. The simulation verification results show that the flexible switching controller can make the terminal voltage vectors of the two busbars quickly reach the same, and realize the non-circulating current switching operation without circulating current.

Key words: FACTS, flexible switch, UPFC, circulating current, voltage adjustment, phase adjustment, transformer maintenance, converter

CLC Number: 

  • TP273