Global Energy Interconnection Three Networks

The Global Energy Interconnection (GEI) Three Networks consist of the UHV transmission network, the smart grid network, and the clean energy generation network, forming an integrated system for global energy security and decarbonization.

Overview of GEI

The Global Energy Interconnection (GEI) is a visionary initiative aimed at connecting power systems worldwide to optimize the use of clean energy, enhance energy security, and support sustainable development goals . Its core concept is the integration of “Smart Grid + UHV + Clean Energy”, enabling efficient transmission of renewable energy across regions, countries, and continents . GEI addresses the uneven distribution and intermittency of renewable resources by linking generation and consumption centers globally.

The Three Networks

1. Ultra-High Voltage (UHV) Transmission Network The UHV network forms the backbone of GEI, enabling long-distance, high-capacity electricity transmission with minimal losses . It connects regions with abundant renewable resources, such as hydropower in northern China or solar and wind in Australia, to high-demand load centers. UHV technology allows for both AC and DC transmission, with HVDC links connecting separate AC systems efficiently .
2. Smart Grid Network The smart grid network integrates advanced information and communication technologies with the power system to optimize energy flow, monitor grid stability, and manage variable renewable generation . It ensures interoperability across different regions and equipment, supports automated control, and enables real-time energy trading and demand response. This network is essential for coordinating the global flow of electricity and information.
3. Clean Energy Generation Network This network focuses on large-scale deployment of renewable energy sources, including wind, solar, and hydropower . By integrating these resources into the UHV and smart grid networks, GEI maximizes the utilization of clean energy, reduces reliance on fossil fuels, and contributes to global emission reduction targets, aligning with the Paris Agreement .

Benefits and Global Impact

• Energy Security and Efficiency: Interconnected networks allow sharing of reserves and generation capacity, reducing dependence on local generators and improving system resilience .
• Decarbonization: GEI facilitates the integration of renewable energy, lowering carbon emissions and supporting climate goals .
• Economic Competitiveness: By optimizing resource allocation across regions and time zones, GEI reduces electricity costs and enhances investment opportunities in clean energy .
• International Cooperation: Successful implementation requires political agreements, harmonized technical standards, and coordinated institutional frameworks, as demonstrated by regional projects like the ASEAN Power Grid and Europe's cross-border interconnections .

Examples of Implementation

• China: 25 UHV projects transmitting hydropower from northern regions to southeastern load centers .
• Central Asia-South Asia (CASA-1000): 1.3 GW hydropower export from Kyrgyzstan and Tajikistan to Afghanistan and Pakistan .
• Australia-Asia PowerLink: 2 GW subsea interconnection with planned solar and battery storage integration .
• GREGY Project: 3 GW submarine cable linking Greece and Egypt to interconnect Southern Europe and North Africa . The GEI Three Networks collectively represent a transformative approach to global energy management, combining advanced transmission, intelligent grid control, and renewable energy deployment to achieve a sustainable, low-carbon, and interconnected energy future.