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Leveraging Energy Storage to Serve Pulsed Loads in Naval DC Microgrids
  • Jack Hannum,
  • Kristen Booth
Jack Hannum
Dept. of Electrical Engineering, University of South Carolina Columbia

Corresponding Author:[email protected]

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Kristen Booth
Dept. of Electrical Engineering, University of South Carolina Columbia


As naval power systems are forced to serve larger and more numerous pulsed loads, new techniques will need to be applied to maintain power quality. Extended Droop Control (EDC) provides robust, adaptable system ­level control capable of serving pulsed loads while maintaining tight bus voltage regulation. Pulsed loads are served from fast responding energy storage resources while slower generation assets are allowed to serve the baseload at their most efficient operating point. EDC achieves transient current sharing between sources through converter output impedance shaping; the limitations of the shaping and the droop impedance maximum frequency are developed. Inter ­converter interactions under EDC cause output current oscillations in multi­ converter systems, which can be corrected with a virtual damping series resistance for energy storage converters. Recommendations for the minimum damping resistance for virtual capacitors are made based on the output impedance shaping analysis. Hardware results validating nominal transient current sharing, the effect of damping resistance, and the ability to transition between EDC and Resistive Droop Control (RDC) are presented. EDC is found to be a powerful method to integrate diverse sources into a DC distribution system serving pulsed loads.
05 Feb 2024Submitted to TechRxiv
12 Feb 2024Published in TechRxiv