A technical paper titled “Multi-rate Discrete Domain Modeling of Power Hardware-in-the-Loop Setups” was published by researchers at the Institute for Technical Physics, Karlsruhe Institute of Technology, Karlsruhe, Germany.
“Power Hardware-in-the-Loop (PHIL) facilitates the testing of novel power engineering solutions in the lab, allowing a flexible testing environment while keeping the high testing fidelity of real hardware. Due to the analog/digital intersection of the PHIL setup, selecting simply continuous or single-rate discrete-time domain fails to model such a hybrid system accurately. This paper proposes a multi-rate discrete-time modeling approach of a PHIL setup that can estimate the mixed analog and digital nature of the PHIL accurately, resulting in accuracy improvement over a wide range of frequencies. The proposed approach applies two different sampling times, a large one connected to the digital simulator and a small one for modeling the analog-hardware part. Dynamics and delays of interfaces, such as analog-to-digital converters, the power amplifier, the sensor, and the low-pass filter, have been accurately modeled and validated by means of experimental results.”
Find the technical paper here. Published: June 2023.
F. Ashrafidehkordi, D. Kottonau and G. De Carne, “Multi-rate Discrete Domain Modeling of Power Hardware-in-the-Loop Setups,” in IEEE Open Journal of Power Electronics, doi: 10.1109/OJPEL.2023.3283035.
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