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Nordic perspective on System Integrity Protection Schemes in relation to capacity allocation

Malmer, Gabriel LU orcid ; Rolander, Arvid ; Hillberg, Emil ; Samuelsson, Olof LU ; Ackeby, Susanne and Nordström, Lars (2025) CIGRE Trondheim Symposium 2025
Abstract
The urgent need to address climate change and pollution prompts societies worldwide to adopt carbon neutral energy and electrification. To facilitate this, a range of technologies and policies will be needed. Alternatives to traditional power grid reinforcement, such as grid-enhancing technologies and system automation, are particularly attractive due to their potentially low cost and fast deployment time. One of these alternatives is System Integrity Protection Schemes (SIPS) – automatic and curative remedial actions (RAs) which can boost grid transfer capacities without compromising with reliability since they can act faster than manual control. The use of SIPS however is scattered, with limited coordination between countries, and the... (More)
The urgent need to address climate change and pollution prompts societies worldwide to adopt carbon neutral energy and electrification. To facilitate this, a range of technologies and policies will be needed. Alternatives to traditional power grid reinforcement, such as grid-enhancing technologies and system automation, are particularly attractive due to their potentially low cost and fast deployment time. One of these alternatives is System Integrity Protection Schemes (SIPS) – automatic and curative remedial actions (RAs) which can boost grid transfer capacities without compromising with reliability since they can act faster than manual control. The use of SIPS however is scattered, with limited coordination between countries, and the full potential of using SIPS for capacity enhancement is not yet realized. The aim of this paper is to provide a case study and comparison of SIPS usage in the Nordic countries, particularly in relation to capacity allocation. It also seeks to harmonize terminology relating to ancillary services, RAs, and SIPS. Finally, it examines and compares the inclusion of RAs and SIPS in different Capacity Calculation Methodologies (CCMs). In both dominant EU CCMs – Net Transfer Capacity (NTC) and Flow-Based (FB) – RAs play a pronounced role. The paper is based on a survey and interviews with Nordic stakeholders, along with a literature review and analysis of public data. The main results indicate a large variation in SIPS use across the Nordics. Regarding terminology, we suggest that SIPS is a subcategory of RAs which overlaps with ancillary services. Concerning CCMs, NTC lacks the ability to fully capture the capacity constraints in meshed AC systems. This in turn makes it unviable to systematically enhance capacities using RAs. FB on the other hand explicitly includes RAs in the capacity domain. A lower bound for the economic value of RAs can be calculated, amounting to 11.5 million € in the Nordics in Nov and Dec 2024. (Less)
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
automation, capacity allocation, flow-based, protection schemes, remedial actions, SIPS
host publication
Symposium Trondheim
article number
1439
pages
10 pages
publisher
CIGRE (International Council on Large Electric Systems)
conference name
CIGRE Trondheim Symposium 2025
conference location
Trondheim, Norway
conference dates
2025-05-12 - 2025-05-15
project
System Integrity Protection Schemes for increased Transfer Capacity
language
English
LU publication?
yes
id
ce6b5830-ede0-49f0-a6da-ece9c6224543
alternative location
https://www.e-cigre.org/publications/detail/symp-tro-2025-symposium-trondheim.html
date added to LUP
2025-04-11 14:27:37
date last changed
2025-12-02 12:30:44
@inproceedings{ce6b5830-ede0-49f0-a6da-ece9c6224543,
  abstract     = {{The urgent need to address climate change and pollution prompts societies worldwide to adopt carbon neutral energy and electrification. To facilitate this, a range of technologies and policies will be needed. Alternatives to traditional power grid reinforcement, such as grid-enhancing technologies and system automation, are particularly attractive due to their potentially low cost and fast deployment time. One of these alternatives is System Integrity Protection Schemes (SIPS) – automatic and curative remedial actions (RAs) which can boost grid transfer capacities without compromising with reliability since they can act faster than manual control. The use of SIPS however is scattered, with limited coordination between countries, and the full potential of using SIPS for capacity enhancement is not yet realized. The aim of this paper is to provide a case study and comparison of SIPS usage in the Nordic countries, particularly in relation to capacity allocation. It also seeks to harmonize terminology relating to ancillary services, RAs, and SIPS. Finally, it examines and compares the inclusion of RAs and SIPS in different Capacity Calculation Methodologies (CCMs). In both dominant EU CCMs – Net Transfer Capacity (NTC) and Flow-Based (FB) – RAs play a pronounced role. The paper is based on a survey and interviews with Nordic stakeholders, along with a literature review and analysis of public data. The main results indicate a large variation in SIPS use across the Nordics. Regarding terminology, we suggest that SIPS is a subcategory of RAs which overlaps with ancillary services. Concerning CCMs, NTC lacks the ability to fully capture the capacity constraints in meshed AC systems. This in turn makes it unviable to systematically enhance capacities using RAs. FB on the other hand explicitly includes RAs in the capacity domain. A lower bound for the economic value of RAs can be calculated, amounting to 11.5 million € in the Nordics in Nov and Dec 2024.}},
  author       = {{Malmer, Gabriel and Rolander, Arvid and Hillberg, Emil and Samuelsson, Olof and Ackeby, Susanne and Nordström, Lars}},
  booktitle    = {{Symposium Trondheim}},
  keywords     = {{automation; capacity allocation; flow-based; protection schemes; remedial actions; SIPS}},
  language     = {{eng}},
  publisher    = {{CIGRE (International Council on Large Electric Systems)}},
  title        = {{Nordic perspective on System Integrity Protection Schemes in relation to capacity allocation}},
  url          = {{https://www.e-cigre.org/publications/detail/symp-tro-2025-symposium-trondheim.html}},
  year         = {{2025}},
}