Kapacitetsallokering för batterilager som levererar snabba reserver
(2025) In CODEN:LUTEDX/TEIE EIEM01 20251Industrial Electrical Engineering and Automation
- Abstract
- Battery Energy Storage Systems (BESSs) are becoming larger, to the extent that they are relevant to consider for direct connection to the transmission network. With increasing electrification, batteries could be useful for grid stability purposes. Their ability to rapidly and accurately deliver high power, both to and from the grid, makes them well-suited for fast system services such as FCR-D and FFR.
At every point in the grid, there are limits to how much power can be transferred without risking overloads. Capacity allocation means that each connected entity is assigned a certain share of the available transfer capacity. BESSs that deliver fast system services only use their maximum transfer capacity for short periods, and since the... (More) - Battery Energy Storage Systems (BESSs) are becoming larger, to the extent that they are relevant to consider for direct connection to the transmission network. With increasing electrification, batteries could be useful for grid stability purposes. Their ability to rapidly and accurately deliver high power, both to and from the grid, makes them well-suited for fast system services such as FCR-D and FFR.
At every point in the grid, there are limits to how much power can be transferred without risking overloads. Capacity allocation means that each connected entity is assigned a certain share of the available transfer capacity. BESSs that deliver fast system services only use their maximum transfer capacity for short periods, and since the grid’s limits depend on time, it may be possible to connect large BESSs in places where equally large static power transfer would not have been possible.
In this study, power transfer from BESSs providing system services was simulated based on historical data. Simulations were carried out both in general terms and for a specific case in the transmission grid. Power transfer was analysed in high-load scenarios in relation to power transfer limitations across different timescales.
The results show that time significantly affects transfer capacity, and suggest that it is possible to connect considerably larger BESSs than what is normally permitted. However, the quantitative results are specific to the analysed system services. BESSs used in other ways may need more allocated capacity. (Less) - Abstract (Swedish)
- Batterilager i elnätet blir vanligare och större, till den grad att det är aktuellt med direk- tanslutning till transmissionsnätet. Som en del av elektrifieringen kan batterier spela en viktig roll för nätets stabilitet − de kan snabbt och exakt leverera mycket effekt, både in i och ut ur nätet. Detta gör dem särskilt lämpade för snabba reserver, såsom FCR-D och FFR.
I varje punkt i elnätet finns gränser för hur mycket effekt som kan överföras utan att riskera överbelastningar, och kapacitetsallokering innebär att varje ansluten enhet tilldelas en viss mängd av denna tillgängliga effekt. Batterilager som levererar snabba reserver utnyttjar bara sin maximala kapacitet under korta stunder, och eftersom nätets begränsande faktorer i... (More) - Batterilager i elnätet blir vanligare och större, till den grad att det är aktuellt med direk- tanslutning till transmissionsnätet. Som en del av elektrifieringen kan batterier spela en viktig roll för nätets stabilitet − de kan snabbt och exakt leverera mycket effekt, både in i och ut ur nätet. Detta gör dem särskilt lämpade för snabba reserver, såsom FCR-D och FFR.
I varje punkt i elnätet finns gränser för hur mycket effekt som kan överföras utan att riskera överbelastningar, och kapacitetsallokering innebär att varje ansluten enhet tilldelas en viss mängd av denna tillgängliga effekt. Batterilager som levererar snabba reserver utnyttjar bara sin maximala kapacitet under korta stunder, och eftersom nätets begränsande faktorer i praktiken är trögrörliga, finns det möjligheter att ansluta stora batterilager på platser där lika stor kontinuerlig överföring inte hade fått plats.
I detta arbete simulerades effektöverföring från batterilager som levererar reserver, utifrån historisk data. Simuleringar gjordes både generellt och för ett specifikt fall i transmissions- nätet. Överföringen analyserades i höglastscenarier i relation till överföringsbegränsningar på olika tidsskalor.
Resultaten visar att tidsaspekten har stor påverkan på behovet av nätkapacitet, och ty- der på att det är möjligt att ansluta betydligt större batterilager än vad som traditionellt anses få plats. De kvantitativa resultaten är dock specifika för de analyserade reserver- na. Batterilager som används på andra sätt har inte samma möjligheter att klara sig på underdimensionerad allokerad effekt. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9202429
- author
- Lian, Sebastian LU
- supervisor
- organization
- alternative title
- Capacity Allocation for Battery Storages Providing System Services
- course
- EIEM01 20251
- year
- 2025
- type
- H3 - Professional qualifications (4 Years - )
- subject
- keywords
- transmission grid, energy storage, battery energy storage system (BESS), system services, frequency control, capacity allocation
- publication/series
- CODEN:LUTEDX/TEIE
- report number
- 5543
- language
- Swedish
- id
- 9202429
- date added to LUP
- 2025-06-23 18:35:40
- date last changed
- 2025-06-23 18:35:40
@misc{9202429,
abstract = {{Battery Energy Storage Systems (BESSs) are becoming larger, to the extent that they are relevant to consider for direct connection to the transmission network. With increasing electrification, batteries could be useful for grid stability purposes. Their ability to rapidly and accurately deliver high power, both to and from the grid, makes them well-suited for fast system services such as FCR-D and FFR.
At every point in the grid, there are limits to how much power can be transferred without risking overloads. Capacity allocation means that each connected entity is assigned a certain share of the available transfer capacity. BESSs that deliver fast system services only use their maximum transfer capacity for short periods, and since the grid’s limits depend on time, it may be possible to connect large BESSs in places where equally large static power transfer would not have been possible.
In this study, power transfer from BESSs providing system services was simulated based on historical data. Simulations were carried out both in general terms and for a specific case in the transmission grid. Power transfer was analysed in high-load scenarios in relation to power transfer limitations across different timescales.
The results show that time significantly affects transfer capacity, and suggest that it is possible to connect considerably larger BESSs than what is normally permitted. However, the quantitative results are specific to the analysed system services. BESSs used in other ways may need more allocated capacity.}},
author = {{Lian, Sebastian}},
language = {{swe}},
note = {{Student Paper}},
series = {{CODEN:LUTEDX/TEIE}},
title = {{Kapacitetsallokering för batterilager som levererar snabba reserver}},
year = {{2025}},
}