REGIONAL AUTONOMY IN ELECTRICITY BALANCING

1. Meaning and Legal Foundation

Regional autonomy in electricity balancing refers to the capacity of a defined geographical electricity region—such as a bidding zone, synchronous area, balancing region, state, province or interconnected market—to retain operational and regulatory discretion while participating in wider electricity-system coordination. Balancing is necessary because electricity generation and consumption must remain continuously matched, with system operators procuring and activating reserves to maintain frequency and system security. In the EU, balancing regulation expressly seeks both common principles and coordinated operation across regions. ACER describes regional methodologies as rules developed by relevant TSOs or NEMOs for particular geographical areas, while EU-wide methodologies establish harmonised standards.

The central legal tension is therefore between regional self-government and system-wide coordination. Excessive autonomy can produce fragmented markets, inefficient reserve procurement and cross-border security risks; excessive centralisation can disregard regional network conditions and legitimate operational responsibilities.

2. Autonomy Within an Interconnected Grid

Regional autonomy does not ordinarily mean complete independence. A regional transmission system operator may retain responsibility for operational security, reserve management and balancing while being required to coordinate actions affecting neighbouring systems. Cross-border electricity flows make unilateral decision-making legally and physically difficult because an action in one region can create congestion or frequency consequences elsewhere.

EU electricity law illustrates this principle through European balancing platforms and regional capacity methodologies. Regulation (EU) 2017/2195 establishes common principles for procurement and settlement of balancing reserves and common activation methodologies.

3. Case Name/Citation

Polskie Sieci Elektroenergetyczne S.A. & Others v ACER, Joined Cases C-281/23 P and C-282/23 P, ECLI:EU:C:2025:822 (23 October 2025).

Facts: Several transmission system operators challenged ACER decisions concerning European platforms for exchanging balancing energy, including the aFRR and mFRR platforms.

Legal Issue: The case concerned the extent of ACER's authority in establishing and approving common European frameworks for balancing-energy exchange and the relationship between regional/national TSOs and EU-level coordination.

Judgment: The Court addressed the legal framework governing European balancing platforms and the institutional allocation of responsibilities between TSOs and ACER. The judgment confirms that balancing increasingly operates through legally structured coordination rather than isolated national systems.

Legal Principle/Ratio: Regional and national operational responsibilities must function within the harmonised framework established by EU electricity legislation where cross-border balancing is concerned.

Significance: The case demonstrates that regional autonomy is legally compatible with integration, but autonomy can be constrained where coordinated balancing is necessary for the functioning and security of the interconnected electricity market.

4. Case Name/Citation

Polskie Sieci Elektroenergetyczne v ACER, Case T-483/21 (25 September 2024).

Facts: The dispute concerned regional operational-security coordination and methodologies for identifying network elements having cross-border relevance.

Legal Issue: Whether regional coordination could require transmission system operators to coordinate remedial actions affecting their networks.

Judgment: The General Court recognised that network elements having cross-border relevance may require coordinated remedial action and that regional coordination can limit the unilateral freedom of TSOs where interconnected-system interests are engaged.

Legal Principle/Ratio: Cross-border relevance justifies coordinated regional action even though individual TSOs retain important operational responsibilities.

Significance: The judgment provides a useful legal foundation for understanding autonomy as conditional autonomy rather than absolute territorial control.

5. South African Perspective

South African electricity law similarly demonstrates the interaction between local electricity responsibilities and national system security. In Eskom Holdings SOC Ltd v Sonae Arauco (Pty) Ltd, [2024] ZASCA 177, the Supreme Court of Appeal considered Eskom's and municipalities' respective responsibilities concerning loadshedding. The Court held that the statutory Codes required Eskom to assume ultimate responsibility for loadshedding where necessary to protect reliable operation of the national grid.

Likewise, NERSA v Borbet SA, [2017] ZASCA 87 recognised municipalities' statutory responsibilities for electricity reticulation while emphasising compliance with national technical and operational requirements.

6. Contemporary Legal Model

A twenty-first-century framework should therefore distinguish three levels: regional autonomy, allowing locally appropriate balancing arrangements; inter-regional coordination, addressing congestion, reserves and cross-border flows; and system-wide authority, capable of overriding fragmented decisions during serious reliability threats.

Regional autonomy is consequently best understood as institutional discretion within an interconnected legal system. The objective is not to eliminate regional authority but to establish clear rules determining when regional decisions prevail, when coordination is mandatory, and when system-wide security justifies intervention.