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A Study of the Impact of Reduced Inertia in Power Systems

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Title:A Study of the Impact of Reduced Inertia in Power Systems
Authors:Agrawal, Urmila
O'Brien, James
Somani, Abhishek
Mosier, Thomas
Dagle, Jeff
Keywords:Distributed, Renewable, and Mobile Resources
frequency response
small-signal stability analysis
system inertia
transient stability analysis
Date Issued:07 Jan 2020
Abstract:Inertia in power systems plays an important role in maintaining the stability and reliability of the system by counteracting changes in frequency. However, the traditional sources of synchronous generation are being displaced by renewable resources, which often have no inherent inertia. This paper investigates the impact of reduced system inertia on several aspects of the dynamic stability of power systems, such as angular stability, primary frequency response, and oscillatory modes. This study is performed on a large-scale 2000 bus synthetic Texas model by selectively replacing synchronous generators with inverter-based generation resources. This paper also compares the analysis results obtained by the above-mentioned inertia-reduction approach of renewable integration with another approach in which the inertia constant of all synchronous generators is decreased. This paper demonstrates that only reducing the inertia of all synchronous generators in a system does not provide an accurate analysis of the challenges associated with the reduced system inertia caused by renewable integration.
Pages/Duration:8 pages
Rights:Attribution-NonCommercial-NoDerivatives 4.0 International
Appears in Collections: Integrating Distributed or Renewable Resources

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