Abstract
This work proposes a new transmission line emulation system designed to test the performance of subsea power electronics systems within a power hardware-in-the-loop (P-HIL) framework. The emulator is composed of cascaded lumped-parameter line equivalent sections, where all resistors of the transmission line electric model are replaced by regenerative power converters. These are employed to emulate a given behavior of relatively wide frequency band loss free resistors. Thus, most of the ohmic losses in a given test setup are avoided and the energy can be injected back to the grid. Furthermore, this emulator allows to reproduce the most significant harmonics including some of the resonance effects in the system under test. Many challenges and relevant topics of power electronics are discussed. These include high performance converters, power ripple across the dc-link of the ac-dc rectifiers, state of the art gallium nitride (eGaN) power devices, and the proposed control structure.
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