1. Introduction

The global governance of interconnected power systems concerns the legal, institutional, technical, and economic arrangements through which electricity networks operating across national or regional boundaries are planned, connected, operated, regulated, and coordinated.

Modern electricity systems are increasingly interconnected through cross-border transmission lines, interconnectors, synchronous grids, regional power pools, electricity markets, and cross-border power purchase agreements (PPAs). Interconnection can reduce generation costs, improve reliability, facilitate renewable-energy integration, and allow countries to share reserves. At the same time, it creates legal questions concerning sovereignty, grid security, transmission access, market rules, environmental approval, liability, dispute settlement, and regulatory jurisdiction. The International Energy Agency identifies system operations, resource adequacy, and governance as the three principal dimensions of cross-border power-system integration. (IEA)

A useful way of understanding global governance is therefore:

National electricity regulation + regional institutions + bilateral/multilateral treaties + technical grid rules + international trade principles = governance of interconnected power systems.

2. Meaning of Interconnected Power Systems

An interconnected power system exists when two or more electricity networks are physically linked so that electricity can flow between them.

Interconnection may occur through:

Bilateral interconnection – two countries or jurisdictions exchange electricity.

Multilateral interconnection – several countries participate in a regional electricity network.

Synchronous interconnection – systems operate at the same frequency and are electrically synchronized.

Asynchronous interconnection – systems are connected through technologies such as HVDC converters.

Market interconnection – physical networks remain nationally operated but electricity markets are coupled.

Integrated regional grids – planning, system operation and electricity trading are coordinated through regional institutions.

The IEA notes that cross-border integration can extend from relatively limited bilateral trading to highly integrated systems involving common markets and coordinated operations. (IEA)

3. Why Global Governance Is Necessary

Electricity does not respect political boundaries once networks are physically interconnected.

A decision taken by one transmission-system operator can affect another jurisdiction through:

frequency deviations;

congestion;

unexpected power flows;

reserve requirements;

voltage instability;

transmission outages;

renewable-energy fluctuations;

cyber incidents;

emergency disconnection.

Consequently, purely national regulation becomes insufficient when electricity networks become deeply integrated.

For example, a transmission operator in Country A may export electricity into Country B, while the physical electricity flow also affects Country C because of loop flows. The resulting legal question is not simply who owns the electricity, but also who controls the network, who bears the cost, who manages congestion, and which regulator has jurisdiction.

4. Principal Pillars of Global Governance

A. International and Regional Agreements

Cross-border interconnection normally requires agreements between governments, regulators and transmission operators.

These agreements can address:

construction of interconnectors;

ownership;

financing;

transmission capacity;

electricity trading;

operational coordination;

emergency assistance;

maintenance;

taxation;

environmental obligations;

dispute resolution.

The United Nations has observed that international grid interconnections can involve national, sub-national and international parties and require legally enforceable agreements concerning construction and operation. (United Nations)

B. Transmission-System Operators

Transmission System Operators (TSOs) occupy a central position.

Their responsibilities generally include:

maintaining system stability;

operating transmission networks;

managing congestion;

allocating interconnection capacity;

coordinating outages;

maintaining frequency;

balancing generation and demand;

facilitating cross-border electricity flows.

In highly integrated regions such as Europe, TSO coordination has become an important component of electricity governance.

5. Cross-Border Transmission Regulation

One of the most important governance questions is third-party access to interconnectors.

A legal framework must determine:

who may use the interconnector;

how capacity is allocated;

how congestion is managed;

whether priority access is permitted;

how transmission charges are calculated;

how revenues are distributed.

The EU's earlier Regulation 1228/2003, for example, established rules concerning fair cross-border electricity exchanges, compensation for cross-border flows, harmonised transmission-charge principles and allocation of available interconnection capacity. (EUR-Lex)

This illustrates an important principle of interconnected-grid governance:

Physical interconnection requires corresponding legal interconnection.

6. Market Coupling and Electricity Trading

Interconnected systems increasingly use market coupling, whereby electricity markets in different jurisdictions are coordinated so that available transmission capacity can be used efficiently.

Governance therefore has two dimensions:

Physical layer

transmission lines;

substations;

converters;

synchronous systems;

protection systems.

Market layer

electricity exchanges;

auctions;

balancing markets;

congestion management;

transmission rights;

settlement mechanisms.

The effectiveness of an interconnected electricity system depends upon coordination between both layers.

7. Grid Stability and Reliability

Interconnection provides reliability benefits because countries can share:

reserve capacity;

balancing resources;

emergency electricity;

flexible generation;

storage;

renewable generation.

However, interconnected systems also create systemic risks.

A disturbance can propagate across borders.

Therefore, governance mechanisms increasingly require:

common technical standards;

frequency-control rules;

reserve obligations;

emergency protocols;

coordinated restoration procedures;

information sharing;

protection-system coordination.

The IEA identifies coordinated system operation and resource adequacy as central elements of cross-border integration. (IEA)

8. Renewable Energy and Interconnected Grids

Global electricity governance is becoming increasingly important because renewable generation is geographically uneven.

For example:

solar power may be abundant in one region;

hydropower may be abundant in another;

wind resources may be concentrated elsewhere.

Interconnection allows electricity to move between regions and can reduce the need for each jurisdiction to maintain identical generation portfolios.

However, renewable integration creates new governance challenges involving:

intermittency;

forecasting;

curtailment;

balancing;

storage;

transmission expansion;

priority dispatch;

cross-border congestion.

Thus, interconnected grids can become an important legal infrastructure for decarbonisation.

9. India's Approach to Cross-Border Electricity Governance

India provides an important example of regional electricity governance.

The Central Electricity Regulatory Commission (CERC) has developed a regulatory framework for cross-border electricity trade with neighbouring countries.

The 2019 Cross Border Trade of Electricity Regulations provide for participation by Indian and neighbouring-country entities and contemplate bilateral agreements, bidding mechanisms and mutual agreements between participating entities. (Indian Kanoon)

The framework also establishes institutional responsibilities involving:

the Designated Authority;

transmission-planning authorities;

settlement agencies;

National Load Despatch Centre;

Central Transmission Utility.

Cross-border transmission links are to be planned jointly with the relevant neighbouring country, subject to governmental approval. (Indian Kanoon)

This demonstrates a sovereignty-plus-coordination model: national governments retain ultimate authority while electricity systems are coordinated across borders.

10. Important Indian Case Law

Sembcorp Energy India Ltd. v. State of Andhra Pradesh (2022)

This case is particularly relevant to cross-border electricity governance.

Sembcorp had entered into arrangements to supply electricity to the Bangladesh Power Development Board (BPDB). The electricity generated in India was transmitted through the Indian transmission system and subsequently crossed into Bangladesh through the India-Bangladesh interconnection. (Indian Kanoon)

The case illustrates several important legal dimensions:

cross-border PPAs;

governmental approval;

CERC regulation;

transmission access;

metering;

scheduling;

regional energy accounting;

interaction between domestic and international electricity regulation.

It demonstrates that cross-border electricity transactions remain embedded within domestic regulatory structures even when their ultimate destination is another country.

11. European Union: A Highly Developed Governance Model

The European Union provides one of the most developed examples of interconnected electricity governance.

Its framework combines:

EU legislation;

national regulators;

transmission-system operators;

regional coordination;

electricity-market coupling;

cross-border capacity allocation;

European institutions.

The underlying objective is to make national electricity systems operate as parts of an increasingly integrated internal electricity market.

The EU framework also recognises that cross-border transmission can create congestion and requires institutional mechanisms for managing it. (EUR-Lex)

12. Case Law: Baltic Cable AB v. Energimarknadsinspektionen

A significant CJEU decision is Baltic Cable AB v. Energimarknadsinspektionen, Case C-454/18.

The dispute concerned an operator of a cross-border electricity interconnector and the application of EU rules concerning congestion revenues.

The Court held that the concept of a transmission-system operator under the relevant EU framework could encompass an undertaking that merely operates and maintains a cross-border interconnector. (EUR-Lex)

Legal significance

The decision demonstrates that:

interconnectors are legally significant infrastructure;

their operators may fall within transmission-system regulation;

congestion revenues are subject to regulatory rules;

cross-border infrastructure cannot necessarily be treated as an ordinary private transmission asset.

The judgment therefore strengthens the principle that interconnection infrastructure is part of the regulated architecture of an integrated electricity market.

13. Case Law: Commission v. Sweden

The CJEU has also addressed the relationship between national electricity arrangements and EU-level market integration.

In cases concerning cross-border electricity and renewable-energy guarantees of origin, the Court has emphasised that national arrangements cannot undermine the uniform operation of EU electricity-market rules.

In Case C-66/13, Commission v. Sweden, the Court considered Sweden's proposed arrangement concerning guarantees of origin for renewable electricity and the EU's external competence. The judgment illustrates how regional integration can constrain unilateral national arrangements where they risk affecting common EU rules. (EUR-Lex)

This is important for global governance because it demonstrates a recurring principle:

The deeper the legal integration of electricity markets, the greater the need to coordinate national external energy policies.

14. United States: Federal Governance of Interconnection

The United States presents a different governance model.

Electricity regulation is divided between federal and state authorities. The Federal Energy Regulatory Commission (FERC) regulates significant aspects of interstate wholesale electricity and transmission, while states retain substantial regulatory authority over retail electricity and other matters.

A recent example is Advanced Energy United v. FERC (D.C. Cir. 2026).

The case concerned FERC's Order 2023 reforms to the generator interconnection process. The D.C. Circuit upheld the challenged reforms, including the use of cluster studies, deadlines and other mechanisms intended to address delays in connecting new generation and storage projects. (Justia Law)

Although this is primarily domestic rather than international, it is highly relevant to interconnected-system governance because it illustrates the importance of:

transparent interconnection procedures;

non-discriminatory access;

defined technical studies;

connection timelines;

regulatory oversight.

15. Sovereignty and Jurisdiction

A central problem in global electricity governance is the tension between territorial sovereignty and technical interdependence.

Each state normally retains authority over:

land;

infrastructure;

electricity licensing;

environmental approvals;

taxation;

national security;

energy policy.

Yet an interconnected system requires decisions that transcend borders.

This produces a layered governance structure:

16. Environmental and Social Governance

Large interconnectors can require:

land acquisition;

environmental-impact assessment;

forest clearance;

biodiversity protection;

community consultation;

compensation;

resettlement.

Consequently, cross-border electricity governance must integrate environmental law with energy law.

A transmission project may be economically beneficial at the regional level but still generate local environmental or social disputes.

The governance framework therefore needs mechanisms for balancing:

energy security + economic efficiency + environmental protection + social legitimacy.

17. Cybersecurity

Modern interconnected grids increasingly depend upon:

digital substations;

SCADA systems;

remote control;

automated protection;

electricity-market platforms;

telecommunications networks.

This creates a cross-border cybersecurity problem.

A cyberattack originating in one jurisdiction could potentially affect infrastructure in another.

Global governance therefore increasingly requires:

cybersecurity standards;

incident reporting;

information sharing;

coordinated emergency response;

supply-chain security;

protection of critical infrastructure.

Cybersecurity illustrates why interconnected power systems cannot be governed solely through traditional electricity statutes.

18. Dispute Resolution

Cross-border electricity disputes may arise concerning:

tariff calculations;

transmission capacity;

curtailment;

PPAs;

delays in construction;

government measures;

access rights;

congestion revenues;

emergency shutdowns.

Potential mechanisms include:

negotiation;

regulatory determination;

expert determination;

arbitration;

domestic courts;

regional courts;

international tribunals.

Clear dispute-resolution clauses are particularly important because an interconnector may involve multiple jurisdictions and investors.

19. Major Governance Challenges

1. Regulatory fragmentation

Different countries may have different electricity laws and market rules.

2. Sovereignty concerns

Governments may resist transferring authority over strategically important infrastructure.

3. Unequal market structures

One country may have competitive electricity markets while another retains vertically integrated utilities.

4. Infrastructure asymmetry

Countries may possess substantially different transmission capacities.

5. Security risks

Physical and cyber disturbances can cross borders.

6. Investment uncertainty

Interconnectors require significant capital and long-term regulatory certainty.

7. Renewable-energy variability

Large-scale renewable penetration increases balancing and transmission requirements.

8. Political disputes

Electricity infrastructure can become linked to broader diplomatic relationships.

20. Emerging Model of Global Governance

A future global governance framework for interconnected power systems is likely to contain several layers:

Layer 1 – National law
Licensing, land, environment, tariffs and energy policy.

Layer 2 – Bilateral agreements
Cross-border electricity trade and interconnector operation.

Layer 3 – Regional institutions
Market coupling, capacity allocation and system coordination.

Layer 4 – International principles
Investment protection, trade rules, environmental obligations and dispute settlement.

Layer 5 – Technical standards
Frequency, voltage, reliability, cybersecurity and interoperability.

This represents a movement from purely national electricity governance toward networked or polycentric governance.

21. Key Legal Principles

The governance of interconnected power systems can therefore be built around the following principles:

Non-discriminatory access

Transparency

Regulatory independence

System reliability

Cross-border cooperation

Cost-reflective and transparent charging

Environmental protection

Consumer protection

Cybersecurity

Effective dispute resolution

Respect for national sovereignty

Coordination between national and regional authorities

22. Conclusion

Global governance of interconnected power systems represents a transition from national electricity regulation toward coordinated multi-level electricity governance.

The principal legal challenge is to reconcile two realities: electricity infrastructure remains largely under national jurisdiction, but its physical operation increasingly produces transboundary consequences.

The EU demonstrates how regional legislation can create common rules for interconnection and electricity markets. India demonstrates a bilateral/regional model in which cross-border electricity trade operates through domestic regulation combined with government-to-government arrangements. The United States illustrates how federal and sub-national authorities can divide regulatory responsibility while maintaining common interconnection procedures.

Cases such as Baltic Cable, Commission v. Sweden, Sembcorp Energy India, and Advanced Energy United v. FERC demonstrate different aspects of this broader legal problem: interconnector regulation, regional market integration, cross-border electricity transactions, and regulated access to transmission networks. (EUR-Lex)

Ultimately, effective global governance requires more than physical interconnection. It requires legal interoperability, institutional coordination, common technical standards, transparent market rules, cybersecurity, environmental safeguards and reliable mechanisms for resolving cross-border disputes. As electricity systems become increasingly renewable, digital and interconnected, these governance mechanisms will become central to international energy law and global energy security.