Initialization and synchronization of power hardware-in-the-loop simulations: a Great Britain network case study

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The hardware under test (HUT) in a power hardware in the loop (PHIL) implementation can have a significant effect on overall system stability. In some cases, the system under investigation will actually be unstable unless the HUT is already connected and operating. Accordingly, initialization of the real-time simulation can be difficult, and may lead to abnormal parameters of frequency and voltage. Therefore, a method for initializing the simulation appropriately without the HUT is proposed in this contribution. Once the initialization is accomplished a synchronization process is also proposed. The synchronization process depends on the selected method for initialization and therefore both methods need to be compatible. In this contribution, a recommended practice for the initialization of PHIL simulations for synchronous power systems is presented. Experimental validation of the proposed method of establishing a PHIL simulation for a Great Britain network case study demonstrates the effectiveness of the approach in achieving stable operation.
Original languageEnglish
Article number1087
Number of pages14
Issue number5
Early online date28 Apr 2018
Publication statusE-pub ahead of print - 28 Apr 2018



  • PHIL
  • power hardware in the loop
  • simulation initialization
  • synchronization
  • time delay
  • synchronous power system
  • stability
  • accuracy improvement

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