An Enhanced Ideal Transformer Method to Integrate Low-Voltage Power Hardware in Arbitrary Voltage Levels

Due to the integration of renewable energy systems into the power grid, converter-driven and resonance stability are becoming increasingly important. This has to be investigated either with accurate but computationally intensive models or via Power Hardware-in-the-Loop (PHiL) simulations. This paper proposes an enhanced Ideal Transformer Method that allows low-voltage power hardware to be integrated into arbitrary simulated voltage levels by introducing a virtual turns ratio. The results show that, by using stability-preserving low-pass filters, a flexible integration of hardware into simulated grids can be realized and thus real converter behavior can be integrated into arbitrary areas of interest while maintaining the closed-loop stability of the PHiL coupling.