Control of a synchronverter-based soft open point in a distribution network

Ruizhu Wu, Li Ran, George Weiss, James Yu

Research output: Contribution to journalArticlepeer-review


The presence of distributed generation (DG) in a power distribution network can cause difficulties in managing the voltage, power flow and fault level as the network was designed for supplying passive loads. This study focuses on the control of a back-to-back (B2B) voltage source converter operated as a synchronverter and a soft open point (SOP) between adjacent feeders to mitigate the voltage fluctuation caused by DG and to increase the reliability of the supply without increasing the fault level. Better reliability is achieved as the B2B converter can continue to supply the loads when a loss of mains occurs on one side. The proposed control of the two DC-AC converters, which also needs to regulate the DC link voltage and adapts the synchronverter algorithm to the new application requirements, so that events will cause minimum disruption. Simulation shows that the B2B-synchronverter is capable of regulating the load voltage under normal mains connected condition, and also limiting the fault current and supplying the loads within its rating during islanding, providing seamless transition to the islanded mode.
Original languageEnglish
Pages (from-to)720-727
Number of pages8
Issue number16
StatePublished - 1 Mar 2019


  • power distribution faults
  • DC-AC power convertors
  • power generation control
  • power grids
  • distributed power generation
  • power distribution control
  • power generation faults
  • voltage-source convertors
  • fault current limiters
  • distributed generation
  • DG
  • power distribution network
  • power flow
  • fault level
  • passive loads
  • back-to-back voltage source converter
  • adjacent feeders
  • voltage fluctuation
  • DC-AC converters
  • DC link voltage
  • load voltage
  • fault current
  • synchronverter-based soft normally open point control


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