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Hardware-in-the-loop methods for real-time frequency-response measurements of on-board power distribution systems

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Pages (from-to)5769-5777
JournalIEEE Transactions on Industrial Electronics
Early online date15 Jul 2018
Publication statusPublished - Jul 2019
Publication typeA1 Journal article-refereed


The operation of more electric aircraft is dependent on the embedded power grid. Therefore, the onboard power-distribution system must be reliable, having
a high level of survivability, and promptly respond to any change in aircraft’s operation. Recent studies have presented a number of frequency-response-based tools with which to analyze both single- and multi-converter systems.
The methods can be efficiently applied for on-board system analysis, stability assessment and adaptive control design. Most often, wideband measurement techniques have been applied to obtain the frequency response from a specific
converter or a subsystem required for the analysis. In the methods, a broadband excitation such as a pseudo-random binary sequence (PRBS) is used as an external injection, and Fourier techniques are applied to extract the spectral
information. This paper presents implementation techniques of the wideband methods using power-hardware-in-the-loop measurements based on OPAL-RT real-time simulator. The presented methods make it possible to modify
the system characteristics, such as impedance behavior, in real time, thereby providing means for various stability and control design tools for on-board power distribution systems. Experimental measurements are shown from a
high-power energy distribution system recently developed at DNV GL, Arnhem, Netherlands.

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