Containing a credible loss to within frequency stability limits in a low inertia GB power system

Nedd, M., Browell, J. , Bell, K. and Booth, C. (2020) Containing a credible loss to within frequency stability limits in a low inertia GB power system. IEEE Transactions on Industry Applications, 56(2), pp. 1031-1039. (doi: 10.1109/TIA.2019.2959996)

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There is a reduction in the percentage penetration of synchronous machines within the Great Britain (GB) power system leading to a decrease in inertia and an increase in the system rate of change of frequency (RoCoF) resulting from power imbalances. This raises the challenge of containing frequency deviations to within the relevant operational limits. As a result, steps need to be taken by the system operator to manage the risk to system security. In order to better understand this risk, this article presents the challenge in light of the changing energy landscape and the current and future frequency response services available to contain frequency deviations. Although the current GB frequency response services may be capable of containing most events within frequency limits, in low-inertia scenarios, these responses alone are not capable of containing excursions within practical RoCoF limits. Consequently, further action must be taken to ensure system security. The system operator currently employs an interim solution of limiting the largest loss risk, depending on system inertia and the RoCoF limit. While this is suitable in the short term, it is unlikely that this option will be cost-effective in the future.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Browell, Dr Jethro
Authors: Nedd, M., Browell, J., Bell, K., and Booth, C.
College/School:College of Science and Engineering > School of Mathematics and Statistics > Statistics
Journal Name:IEEE Transactions on Industry Applications
ISSN (Online):1939-9367
Published Online:16 December 2019
Data DOI:10.15129/62d7586a-8efe-4616-9e3f-f0033f8f6515

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