A new, universal Series Hybrid Cascaded H-Bridge Converter for Power-Hardware in the Loop Emulation

This paper presents a new Series-Hybrid Cascaded H-Bridge (SH-CHB) Converter for Power-Hardware in the Loop (PHIL) systems. The converter combines the benefits of CHB-Cells, high power density and high system efficiency, with the advantages of Linear Power Amplifiers (LPA), high bandwidth and high fidelity. The introduced system is used to emulate different AC-grids as well as DC-grids with simultaneous supply of sinusoidal test signals for impedance spectroscopy of converters. The system provides sinusoidal test signals up to 105 kHz with a three-phase output AC voltage of 400 V or a DC voltage of 1000 V. The maximum output power of the system is 60 kVA.