d398a6ced2
- CitrineOS core extracted (CSMS OCPP 2.0.1) - OpenOCPP extracted (firmware OCPP 1.6J/2.0.1) - ShapeShifter library installed (pip install -e) - ShapeShifter specification extracted - EVerest extracted TODO updated with progress
69 lines
4.4 KiB
Markdown
69 lines
4.4 KiB
Markdown
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SPDX-FileCopyrightText: 2020-2023 Contributors to the Shapeshifter project
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SPDX-License-Identifier: Apache-2.0
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# Scope
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## Constraint management services
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Constraint management services help grid operators (TSOs and DSOs) to optimize grid operation according to physical and market constraints.
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USEF [^B1] distinguishes four different flexibility services within the constraint management category: grid capacity management, congestion management, voltage control and controlled islanding.
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UFTP can be used for the first two of these.
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[^B1]: USEF, "Flexibility Value Chain (update 2018)," 8 10 2018. [Online]. Available: [https://www.usef.energy/app/uploads/2018/11/USEF-White-paper-Flexibility-Value-Chain-2018-version-1.0_Oct18.pdf](https://www.usef.energy/app/uploads/2018/11/USEF-White-paper-Flexibility-Value-Chain-2018-version-1.0_Oct18.pdf).
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### Grid capacity management
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Grid capacity management refers to the use of explicit demand-side flexibility (by the DSO or TSO) to increase operational efficiency without impacting freedom of dispatch, trade and connect (copper plate principle).
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It is primarily used to defer grid reinforcements, optimize asset operational performance, reduce grid losses, or support planned maintenance.
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The implication is that AGRs (and prosumers) participate in the product on a voluntary basis; i.
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e.
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motivated by appropriate financial incentives.
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### Congestion management
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Congestion management refers to the use of flexibility to reduce peak loads, in order to avoid system overload and the associated component or system failures.
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Contrary to grid capacity management, it will typically limit freedom of dispatch, trade and/or connect.
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It is primarily used in unanticipated overload situations; e.
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g.
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those which could not be forecast during long-term grid planning processes, or where load/ generation increases have outpaced grid reinforcement efforts.
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Congestion management is a temporary solution (typically until grid reinforcement takes place) and is a highly-regulated mechanism.
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At present, it is only available to TSOs in most European member states although it may be offered to DSOs in the future.
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The two mechanisms differ in the freedom of dispatch, trade and/or connect and this is handled via contracts and will have impact on the settlement components.
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## Bilateral trading and trading via a market platform
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UFTP is designed for bilateral trading between the AGR and DSO.
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Trading via market platforms can bring added value, see [^B2].
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In UFTP, market platforms may take the role of trading counterparty, hence serving as a DSO proxy in trades with the AGR, and as an AGR proxy in trades with the DSO.
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When trading via a platform, the role of FlexRequests from DSOs to AGRs is less obvious; i.e., a DSO has free choice of the available FlexOffers.
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In addition, FlexOffers and FlexRequests do not need to be directly related and so UFTP supports unsolicited FlexOffers without requiring a reference to an underlying FlexRequest.
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## TSO/DSO coordination
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USEF assumes that a DSO or TSO can freely and independently trade flexibility with AGRs.
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Any potential goal conflicts can be settled through the market mechanism.
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Alternatively, TSO and DSO requests can be aligned, resulting in a TSO/DSO coordination platform where TSOs and DSOs coordinate the tendering, trading, activation and/or settlement of flexibility for their own purposes ( i. e. ancillary services).
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See [^B2] for a discussion on this topic.
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[^B2]: USEF, "White paper: Flexibility Platforms," 2 november 2018. [Online]. Available: [https://www.usef.energy/app/uploads/2018/11/USEF-White-Paper-Flexibility-Platforms-version-1.0_Nov2018.pdf](https://www.usef.energy/app/uploads/2018/11/USEF-White-Paper-Flexibility-Platforms-version-1.0_Nov2018.pdf).
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UFTP can be applied without any further changes in a configuration where there is TSO/DSO coordination.
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## Alternative use
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The text, graphs and examples in this document assume flex trading between AGR and DSO.
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However, UFTP can equally be used for grid constraint services between an AGR and TSO.
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The messages defined in UFTP can also be used for flexibility trading in the plan phase between an AGR and BRP.
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See the USEF Framework Specifications [^B3] for a complete description of this alternative use.
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[^B3]: USEF, "USEF - The FrameWork Specifications 2015," 2015. [Online].
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