Performance metrics for droop-controlled microgrids with variable voltage dynamics
(2015) 54th IEEE Conference on Decision and Control, CDC 2015 In Proceedings of the IEEE Conference on Decision and Control 54rd IEEE Conference on Decision and Control,CDC 2015. p.7502-7509- Abstract
This paper investigates the performance of a microgrid with droop-controlled inverters in terms of the total power losses incurred in maintaining synchrony under persistent small disturbances. The inverters are modeled with variable frequencies and voltages under droop control. For small fluctuations from a steady state, these transient power losses can be quantified by an input-output H2 norm of a linear system subject to distributed disturbances. We evaluate this H2 norm under the assumption of a dominantly inductive network with identical inverters. The results indicate that while phase synchronization, in accordance with previous findings, produces losses that scale with a network's size but only weakly depend on its connectivity,... (More)
This paper investigates the performance of a microgrid with droop-controlled inverters in terms of the total power losses incurred in maintaining synchrony under persistent small disturbances. The inverters are modeled with variable frequencies and voltages under droop control. For small fluctuations from a steady state, these transient power losses can be quantified by an input-output H2 norm of a linear system subject to distributed disturbances. We evaluate this H2 norm under the assumption of a dominantly inductive network with identical inverters. The results indicate that while phase synchronization, in accordance with previous findings, produces losses that scale with a network's size but only weakly depend on its connectivity, the losses associated with the voltage control will be larger in a highly connected network than in a loosely connected one. The typically higher rate of convergence in a highly interconnected network thus comes at a cost of higher losses associated with the power flows used to reach the steady state.
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- author
- Tegling, Emma LU ; Gayme, Dennice F. and Sandberg, Henrik LU
- publishing date
- 2015-02-08
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Inverters, Load modeling, Loss measurement, Microgrids, Power system stability, Transient analysis, Voltage control
- host publication
- 54rd IEEE Conference on Decision and Control,CDC 2015
- series title
- Proceedings of the IEEE Conference on Decision and Control
- volume
- 54rd IEEE Conference on Decision and Control,CDC 2015
- article number
- 7403404
- pages
- 8 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- 54th IEEE Conference on Decision and Control, CDC 2015
- conference location
- Osaka, Japan
- conference dates
- 2015-12-15 - 2015-12-18
- external identifiers
-
- scopus:84962016580
- ISSN
- 0743-1546
- ISBN
- 9781479978861
- DOI
- 10.1109/CDC.2015.7403404
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2015 IEEE.
- id
- 38655a09-dcf0-4c2c-a9a7-2b892e332783
- date added to LUP
- 2021-11-24 09:57:29
- date last changed
- 2022-04-27 06:16:44
@inproceedings{38655a09-dcf0-4c2c-a9a7-2b892e332783, abstract = {{<p>This paper investigates the performance of a microgrid with droop-controlled inverters in terms of the total power losses incurred in maintaining synchrony under persistent small disturbances. The inverters are modeled with variable frequencies and voltages under droop control. For small fluctuations from a steady state, these transient power losses can be quantified by an input-output H2 norm of a linear system subject to distributed disturbances. We evaluate this H2 norm under the assumption of a dominantly inductive network with identical inverters. The results indicate that while phase synchronization, in accordance with previous findings, produces losses that scale with a network's size but only weakly depend on its connectivity, the losses associated with the voltage control will be larger in a highly connected network than in a loosely connected one. The typically higher rate of convergence in a highly interconnected network thus comes at a cost of higher losses associated with the power flows used to reach the steady state.</p>}}, author = {{Tegling, Emma and Gayme, Dennice F. and Sandberg, Henrik}}, booktitle = {{54rd IEEE Conference on Decision and Control,CDC 2015}}, isbn = {{9781479978861}}, issn = {{0743-1546}}, keywords = {{Inverters; Load modeling; Loss measurement; Microgrids; Power system stability; Transient analysis; Voltage control}}, language = {{eng}}, month = {{02}}, pages = {{7502--7509}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, series = {{Proceedings of the IEEE Conference on Decision and Control}}, title = {{Performance metrics for droop-controlled microgrids with variable voltage dynamics}}, url = {{http://dx.doi.org/10.1109/CDC.2015.7403404}}, doi = {{10.1109/CDC.2015.7403404}}, volume = {{54rd IEEE Conference on Decision and Control,CDC 2015}}, year = {{2015}}, }