I.  Introduction

The global energy transition is no longer a story told in megawatts and policy pledges alone. It is increasingly written in cables, corridors, and cross-border agreements, in the physical and institutional architecture being laid down today that will determine how, where, and at what cost clean electricity flows across continents for the next half-century. At the center of this emerging architecture sit three interconnected concepts: Green Energy Zones (GEZs), Green Energy Corridors (GECs), and High Voltage Direct Current (HVDC) transmission systems. Understanding how they interact, and why the Middle Corridor is becoming one of the most strategically consequential routes in this new map, is essential for policymakers, investors, and energy professionals alike.

 What is the Energy Architecture: GEZs, GECs, and HVDC

Green Energy Zones act as centralized hubs where sustainable energy generation is maximized by combining high-quality renewable resources, infrastructure, and storage – the origin points of the new energy map. Green Energy Corridors serve as the connective tissue: integrated transmission and infrastructure systems designed to enable large-scale cross-border trade of renewable electricity, wind, solar, hydro, and green hydrogen across regions and continents.

Rather than treating GEZs and GECs as separate routes, it is more accurate to define them as a system-of-systems across three layers: (1) Core Physical Infrastructure: solar, wind, hydro, HVAC/HVDC lines, converter stations; (2) Flexibility and Storage: BESS, pumped hydro, and green hydrogen power-to-X infrastructure; and (3) Digital and Market Infrastructure: SCADA, AI forecasting, grid codes, Guarantees of Origin (GoO), and long-term PPAs. When all three function in concert, a GEC becomes an energy system capable of anchoring regional industrial transformation.

HVDC – the backbone of every corridor. Unlike HVAC, HVDC suffers lower line losses over distance, enables precise power flow control, and allows asynchronous grid interconnection – critical for linking national grids operating at different frequencies. For any GEC spanning hundreds or thousands of kilometers, HVDC is not optional. It is the backbone.

China, Europe, and North America host the world’s three largest HVDC networks. The global supply chain is anchored by Hitachi Energy, GE Vernova, Prysmian, Nexans, NKT, LS Cable & System, Mitsubishi Electric, Sumitomo Electric, and Chinese firms XJ Electric, NR Electric, and ZTT Group, together the technological core of the intercontinental energy transition.

The Changji–Guquan line in China, commissioned in 2019 by State Grid Corporation of China, remains the definitive proof of concept: 3,324 km, ±1,100 kV, ~12 GW capacity, ~255 million tonnes of CO₂ avoided. It is operational infrastructure at civilization scale, proving that transcontinental renewable energy integration is not a distant ambition. It is already happening. The table below maps eight corridors across four continents, from operational benchmarks to projects in advanced development:

This is not a pilot project or a proof of concept. It is operational infrastructure at civilization scale, and it proves, definitively, that long-distance renewable energy integration is not a distant ambition. It is already happening.

Three intercontinental projects currently in development or proposal stage extend this logic across oceans and borders:

Australia-Asia PowerLink (AAPowerLink): SunCable’s flagship initiative, connecting Australia’s Northern Territory to Darwin and Singapore via a 5,100 km HVDC system, including 4,300 km of subsea cable. Up to 6 GW of 24/7 renewable electricity; 4 GW earmarked to stimulate green industrial development in Darwin (hydrogen, e-fuels, green minerals, data centers); 1.75 GW of flat-load electricity exported to Singapore. Four-year construction phase planned from 2028, with a 70- year operating life. The project is being developed in cooperation with the Indonesian government to ensure environmentally responsible subsea routing.

Sila Atlantik: Connecting Morocco and Germany through two HVDC subsea cables spanning approximately 4,800-5,000 km, with 2 × 1.8 GW transmission capacity, up to 26 TWh per year of renewable electricity, up to 15.2 GW of solar and wind generation capacity in Morocco, and up to 8.6 TWh of battery storage. First electricity flows targeted around 2034. The project positions Morocco as a strategic partner in Europe’s energy transition, though its realization will depend heavily on political coordination, financing structures, and integration into European network planning frameworks.

Caspian-Black Sea-Europe Green Energy Corridor: Connecting Azerbaijan, Georgia, Romania, and Hungary through a 1,195 km HVDC route (approximately 1,155 km subsea, ~40 km onshore) at ~525 kV, with 1.3 GW initial transmission capacity and a 4 GW export target. Operated by the Green Energy Corridor Power Company, a joint venture between Azerenerji (Azerbaijan), Georgian State Electrosystem (Georgia), MVM (Hungary), and Transelectrica (Romania). Completion targets: first cable by ~2032, full build-out by 2040. The project has been included in ENTSO-E’s Ten-Year Network Development Plan (TYNDP 2026), and the feasibility study is being carried out by CESI SpA.

Source: Author’ illustration (only for visualisation purpose)

Complementing this, the Green Corridor Alliance, a joint venture established in 2025 between Azerenerji (Azerbaijan), Kazakhstan Electricity Grid Operating Company (Kazakhstan), and National Power Grid JSC (Uzbekistan), lays the groundwork for integrating Central Asian renewable potential into the transcontinental corridor. Kazakhstan and Uzbekistan hold substantial wind and solar resources that, once connected, could substantially expand clean energy exports westward. The prospect of eventually incorporating Turkmenistan’s largely untapped potential would transform this from a regional corridor into a genuinely trans-Eurasian green energy network.

II.  Discussion

Azerbaijan and the Middle Corridor: An Energy Foundation Takes Shape

The Middle Corridor’s strategic relevance has grown considerably since 2022, as a trade route, a geopolitical reorientation axis, and increasingly, as an energy bridge. But the corridor’s long-term viability as a green energy artery depends on what is built at its source. And here, Azerbaijan is moving with notable intent.

The country’s technical renewable energy potential is substantial: 135 GW onshore and 157 GW offshore – well beyond domestic needs and firmly in export-scale territory. The national target is nearly 40% renewables by 2030. Delivery is already visible: Garadagh Solar (230 MW, Masdar); Khizi-Absheron Wind (240 MW); Bilasuvar Solar (445 MW, ACWA Power); Neftchala Solar (315 MW); Shafag Solar (240 MW, first utility-scale project in the liberated territories); and 32 Karabakh and East Zangazur hydropower plants at 270 MW, expanding to 500 MW, and others.

These are not isolated installations. They are the generation foundation for an integrated export architecture – one in which Azerbaijan functions not merely as a transit state but as a Green Energy Zone in its own right, feeding clean electricity into Europe via the Caspian–Black Sea route. The Green Corridor Alliance – established in 2025 between Azerenerji, Kazakhstan Electricity Grid Operating Company, and National Power Grid JSC (Uzbekistan) – extends this logic further, integrating Central Asian renewables and laying the groundwork for a genuinely trans-Eurasian green energy network.

“Green Energy Corridors are not just wires and substations, they are engines for economic transformation, instruments through which countries can simultaneously address energy security, industrial policy, climate commitments, and long-term competitiveness.”

Opportunities as Economic Multipliers

The development of GECs, such as the Caspian-Black Sea–Europe Green Energy Corridor, does far more than move electricity from point A to point B. These corridors generate wide-ranging economic spillovers, transforming how countries produce, innovate, and compete in the renewable energy era. For corridor countries like Azerbaijan, the opportunity is as much economic as it is infrastructural, and it reaches across multiple dimensions simultaneously.

A corridor like the Caspian–Black Sea–Europe route does far more than move electrons from point A to point B. It creates cascading economic transformations along its entire length: (1) local supply chain development that embeds technical capacity domestically; (2) investment mobilization through bankable, long-duration assets that attract green bonds and development bank co-financing; (3) new industry emergence in renewable manufacturing, storage, and green hydrogen; job creation across skill-intensive HVDC, offshore wind, and smart grid sectors; and (4) technology transfer through engagement with global suppliers and R&D partnerships.

Beyond these direct effects, GECs enhance regional energy security, reduce fossil fuel import dependency, and strengthen ESG credentials – increasingly material for sovereign credit ratings and foreign investment attraction. Green Energy Corridors, in short, are engines for economic transformation – instruments through which countries can simultaneously address energy security, industrial policy, climate commitments, and long-term competitiveness.

III.  Conclusion

Across all three scenarios, one conclusion holds: the structural case for the Middle Corridor is not in question. The global HVDC market is projected to grow from $12B in 2024 to $23.5B by 2033, the technology and supply chain will be available. The variables are supply-chain, timing, financing architecture, and political coordination, not the underlying resource endowment or technical feasibility.

The infrastructure being planned and built today, from the Changji-Guquan line to the Caspian-Black Sea cable, from Australia’s solar fields to Morocco’s Atlantic wind zones, is not a set of isolated engineering projects. It is the emergent architecture of a new global energy order. The Middle Corridor sits at a particularly consequential junction: linking resource- rich generating zones in Central Asia and the South Caucasus with energy-hungry markets in Europe, through Azerbaijan, Georgia, Kazakhstan, Uzbekistan that are actively investing in the renewable foundation required to make that link real.

The question is no longer whether transcontinental green energy corridors are technically or economically feasible. Changji- Guquan answered that in 2019. The question now is which routes get built first, which countries position themselves as indispensable nodes, and which economies capture the industrial and investment value that flows alongside the electrons.

For the Middle Corridor, the rewiring has begun.

 The author: Elchin Ismayilov, Independent Researcher.

 Welcomes engagement on the technological, investment, and industrial dimensions of economic corridor development across green energy,          digital, and transport infrastructure systems in Central Asia, the South Caucasus, Türkiye, and the Middle East. (LinkedIn)

This article was originally published and full version can be found at:

The Hague Research Institute for Eastern Europe, the South Caucasus and Central Asia (hagueresearch.org)