Aggregators DR Relationships Comillas (2025)

Academic journal article reviewing independent aggregator relationships across four actor pairs. Part of the BeFlexible Horizon project’s academic output. Provides the most structured EU-level typology of IA commercial and operational arrangements available.

Title: “Empowering Energy Markets: Unraveling the Dynamics of Aggregators Relationships in Demand Response Services”. Institution: Institute for Research in Technology (IIT), Comillas Pontifical University (Madrid). Funding: BeFlexible project (EU Horizon, grant no. 101075438). The raw copy is the pre-print.

Summary

Reviews the independent aggregator (IA) as a market intermediary in demand response, analysing its relationships with four key actor types: electricity suppliers/BRPs, DER owners, system operators (SOs, both TSO and DSO), and Flexibility Requesting Parties (FRPs — SOs or other agents interested in balancing their portfolio). For each relationship the paper maps commercial, technical, and regulatory dimensions, drawing heavily on the USEF framework and reviewing design options for compensation mechanisms, balance responsibility allocation, baseline methodologies, and market participation formats. Draws on 50 academic/regulatory references. Funded by BeFlexible; research group is Comillas IIT, which also produced the companion papers on DSO mechanism interaction and submetering (see Source - DSO Service Acquisition Interaction Comillas (2024) and Source - Submetering for Flexibility Services Comillas (2024)).

Note (2026-09-18 audit): an earlier version of this page’s “Key claims” section substituted invented category labels for the paper’s actual terminology in several places (compensation models, baseline methods, market-access routes) and cited regulatory concepts — NC DR, the Nordic Balancing Model, EMD Art. 7b, SWITCH/NODES pilots — that do not appear anywhere in the raw text. The section below has been rewritten against the raw document.

Key claims

IA–Supplier (BRP) relationship — the central structural tension

The IA modifies the supplier’s metered balance without prior coordination. The paper (via the USEF framework) describes two forms of the IA’s relationship with the BRP: single BRP or dual BRP. It then reviews two distinct three-way compensation typologies for different situations:

Imbalance compensation (§3.2, general aggregator-caused imbalances):

Transfer-of-energy compensation (§3.3, a related but distinct compensation question):

The paper does not state a forward-looking regulatory claim about NC DR pushing toward independent balance responsibility, nor does it endorse independent responsibility as “structurally cleaner” — it reports that concerns exist about correcting aggregator-caused imbalances, and cites Voltalis and Baker as arguing against correcting the suppliers’ BRP (an attributed argument, not the paper’s own position). The regulated model, when managed by a third party, is noted to offer aggregator independence but faces criticism for potentially undermining customer savings.

IA–DER relationship — baselines and pooling

The baseline is the counterfactual consumption/generation profile against which DR delivery is measured. The paper lists these baseline methodologies:

• Baseline submitted by the flexibility service provider — the DSO uses a consumption/generation profile provided by the DSP before activation
• High X of Y — based on the highest-consuming days among a reference set
• Meter before/meter after — comparing metered values before and after activation
• Regression methods — multiple data sources used to calculate a baseline profile for each aggregator
• Rolling average — determined by averaging metered consumption over a specified number of days, with an option to prioritize certain days

There is no “customer baseline load (CBL) / metered reference / hybrid” three-way taxonomy in the paper — that was an invented simplification. Submetering (dedicated measuring devices) is discussed as an enabler for improving attribution when multiple DERs share a connection point, but the paper does not cite a specific “Art. 7b EMD reform” article number for this.

The USEF framework (as the paper reports it) distinguishes unit-level participation (flexibility offered at each individual unit/customer) from portfolio-level participation (flexibility provided from a set of flexible assets without specifying them in advance) — not a “minimum MW threshold” pooling-conditions claim, which does not appear in the raw text.

IA–SO relationship — imbalance pricing design

Two pricing structures are discussed for imbalances:

• Single imbalance price: one price for all deviations from schedule
• Dual imbalance price: buy/sell prices differ

The paper does not frame dual pricing as creating “perverse incentives to game imbalance positions” — it states the opposite: dual pricing incentivizes participants to balance their energy resources and reduce system imbalances, and within DR aggregation, dual pricing is seen as a way to create financial value for aggregators. The paper does not endorse either pricing scheme, does not mention the Nordic Balancing Model at all, and instead flags an open question: how dual pricing more precisely provides value for aggregators and how that affects system imbalance.

IA–FRP relationship — market types and product types

The paper (via the USEF framework) describes four market types an FRP can offer, not three “access routes”: Wholesale Energy Services (bulk electricity transactions), Constraint Management (optimizing grid operations), Balancing (ensuring power system stability), and Adequacy (securing reliable generation capacity) — plus two product types, Availability and Activation. The raw text does not mention SWITCH, NODES, or BeFlexible pilots anywhere, and makes no claim about most EU DSOs defaulting to bilateral agreements due to low LFM maturity — those specifics were unsupported additions.

Relevance to wiki

Directly enriches:

• Aggregation — adds the paper’s actual imbalance/transfer-of-energy compensation typologies and single/dual BRP framing
• Baseline Methods — confirms the paper’s five baseline method categories; adds submetering as attribution enabler
• Demand Response — IA as structural enabler of explicit DR at scale; imbalance pricing design implications
• Flexibility Market — USEF’s four market types and two product types for FRP-side participation

Cross-references:

• Complements Source - EC LFM Specification and Design Criteria (VITO, 2025) which notes independent aggregation models moved from NC DR to EB GL
• Corroborates Source - FlexAbility Delrapport 5 (2025) on BSP/BRP friction as primary barrier