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Estimation of Power System Inertia from Electromechanical Modes

Johnsson, Vidar and Samuelsson, Olof LU (2020) 55th International Universities Power Engineering Conference, UPEC 2020
Abstract

The inertia of many power systems is expected to decrease as more wind and solar power is introduced. With low inertia, a need to estimate it arises. The estimation method should preferably work during normal operation, in order to ensure that the grid frequency can be maintained during any sudden disturbance. This study proposes a new method for inertia estimation, based on electromechanical modes. The method consists of two steps, the first being estimation of modes, which is done from normal frequency variations, and the second being estimation of the inertia from the modes, which is done using a model of the system. The rigid body mode, in which all machines in the system participate, and inter-area and other inter-generator modes... (More)

The inertia of many power systems is expected to decrease as more wind and solar power is introduced. With low inertia, a need to estimate it arises. The estimation method should preferably work during normal operation, in order to ensure that the grid frequency can be maintained during any sudden disturbance. This study proposes a new method for inertia estimation, based on electromechanical modes. The method consists of two steps, the first being estimation of modes, which is done from normal frequency variations, and the second being estimation of the inertia from the modes, which is done using a model of the system. The rigid body mode, in which all machines in the system participate, and inter-area and other inter-generator modes are all possible to use. The method was applied to simulated systems with results indicating that it is potentially useful for inertia estimation.

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Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
frequency dynamics, frequency stability, Inertia, mode estimation, rigid body mode
host publication
2020 55th International Universities Power Engineering Conference (UPEC) : Verifying the Targets - Verifying the Targets
article number
9209861
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
conference name
55th International Universities Power Engineering Conference, UPEC 2020
conference location
Virtual, Torino, Italy
conference dates
2020-09-01 - 2020-09-04
external identifiers
  • scopus:85095589284
ISBN
9781728110783
DOI
10.1109/UPEC49904.2020.9209861
language
English
LU publication?
yes
id
78d506db-59be-4b79-a7c4-7ed03918ce60
date added to LUP
2021-01-12 10:06:36
date last changed
2022-04-26 23:24:24
@inproceedings{78d506db-59be-4b79-a7c4-7ed03918ce60,
  abstract     = {{<p>The inertia of many power systems is expected to decrease as more wind and solar power is introduced. With low inertia, a need to estimate it arises. The estimation method should preferably work during normal operation, in order to ensure that the grid frequency can be maintained during any sudden disturbance. This study proposes a new method for inertia estimation, based on electromechanical modes. The method consists of two steps, the first being estimation of modes, which is done from normal frequency variations, and the second being estimation of the inertia from the modes, which is done using a model of the system. The rigid body mode, in which all machines in the system participate, and inter-area and other inter-generator modes are all possible to use. The method was applied to simulated systems with results indicating that it is potentially useful for inertia estimation.</p>}},
  author       = {{Johnsson, Vidar and Samuelsson, Olof}},
  booktitle    = {{2020 55th International Universities Power Engineering Conference (UPEC) : Verifying the Targets}},
  isbn         = {{9781728110783}},
  keywords     = {{frequency dynamics; frequency stability; Inertia; mode estimation; rigid body mode}},
  language     = {{eng}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  title        = {{Estimation of Power System Inertia from Electromechanical Modes}},
  url          = {{http://dx.doi.org/10.1109/UPEC49904.2020.9209861}},
  doi          = {{10.1109/UPEC49904.2020.9209861}},
  year         = {{2020}},
}