File:An adaptive, multi-rate linear quadratic regulator for a shipboard MVDC distribution system with constant power loads (IA andaptivemultira1094556159).pdf
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Summary[edit]
An adaptive, multi-rate linear quadratic regulator for a shipboard MVDC distribution system with constant power loads
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| Author |
Mills, Adam J. |
| Title |
An adaptive, multi-rate linear quadratic regulator for a shipboard MVDC distribution system with constant power loads |
| Publisher |
Monterey, California: Naval Postgraduate School |
| Description |
Future U.S. Navy warships will have DC electrical distribution systems. These distribution systems will include multiple layers of electronic power converters. When coupled to high-bandwidth controllers, power converters behave as constant power loads to the distribution system. Constant power loads have a negative non-linear impedance characteristic that threatens system stability. Many different single-input control schemes have been applied to DC microgrids with constant power loads. In this work we propose a centralized select-matrix, multi-rate linear quadratic regulator (LQR-SM)- based control scheme to provide a flexible and adaptable controller for high-order, multi-input, and multi-rate distribution systems. The proposed controller is investigated via MATLAB time-domain simulation. LQR-SM controller performance is compared to both block-cyclic multi-rate LQR and state-feedback linearization. LQR-SM controller simulations show vastly reduced computational load and improved robustness compared to block-cyclic LQR and reduced energy-storage element sizing compared to state-feedback linearization. A genetic algorithm design procedure is described for the controller. The design process outlines evaluation function development, choosing the initial generation of candidates, and genetic algorithm process flow. Finally, engineering trade-offs are considered. In this work we investigate engineering trade-offs with respect to computational load, regions of attraction, and energy-storage efficiency when reduced fidelity and non-adaptive controller configurations are considered. Subjects: medium voltage DC; constant power loads; CPL; linear quadratic regulator; LQR; integrated power systems; IPS; multirate; genetic algorithm |
| Language | English |
| Publication date | September 2017 |
| Current location |
IA Collections: navalpostgraduateschoollibrary; fedlink |
| Accession number |
andaptivemultira1094556159 |
| Source | |
| Permission (Reusing this file) |
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, it may not be copyrighted. |
Licensing[edit]
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This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| current | 10:11, 14 July 2020 |  | 1,275 × 1,650, 146 pages (3.2 MB) | Fæ (talk | contribs) | FEDLINK - United States Federal Collection andaptivemultira1094556159 (User talk:Fæ/IA books#Fork8) (batch 1993-2020 #6921) |
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