Voltage-frequency Stability of a Low Inertia Electrical Grid using a Kuramoto Model  

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CIRED 2019 - 2255.pdf (557.82 KB)
Paper number
2255
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Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Pollak, Robert, university of ottawa, Canada
Fattahi, Javad , university of ottawa, Canada
Schriemer, Henry , university of ottawa, Canada
Rana, Rohit, university of ottawa, Canada
Abstract
This paper investigates the voltage and phase dynamics of a low inertia inverter based Microgrid in islanded operation. In such case, the network is less robust to disturbances due to the lack of associated inertia within an inverter. In islanded operation the assumption of a stiff grid is no longer valid and the voltage and phase adjustment based on conventional droop control have a resulting effect on the power flows throughout the network where voltage and frequency stability of the network may be compromised. Other approaches neglect the network dynamics when there are power imbalances in the system and how each node is affected and if the resulting increase in demand can be met with the available generation. This paper uses the fact that the phase dynamics of coupled inverters that employ droop control closely resemble the phase dynamics proposed by the Kuramoto model. Using this model allows the network stability to be analysed under the true nonlinear operation. We find through the strong coupling impedance of the primary distribution transmission lines and the implementation of robust droop control provides an appropriate means for rural and suburban neighbourhoods to operate independently.
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Publisher
AIM
Date
2019-06-03
Published in
CIRED 2019 Conference
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/774
http://dx.doi.org/10.34890/999
ISSN
2032-9644
ISBN
978-2-9602415-0-1