In today’s interconnected world, electricity is no longer confined within national borders. Countries across the globe are sharing energy through cross-border power trading to ensure reliable supply, reduce costs, and support renewable energy growth. This system allows one country to send electricity to another when there is surplus production and receive energy when demand rises.
Energy sharing between countries has become essential for economic development, energy security, and environmental sustainability. In South Asia, power sharing between Bangladesh and India has become a successful example of regional cooperation.
This detailed blog explains how energy is shared between countries, the technologies used, economic and environmental benefits, and how Bangladesh and India are working together in power trading.
What Is Cross-Border Energy Sharing?
Cross-border energy sharing is the process of transferring electricity or other forms of energy (such as gas or oil) from one country to another through interconnected power systems.
This sharing happens when:
- One country produces surplus electricity.
- Another country faces a shortage or high demand.
- Renewable energy production fluctuates.
- Countries want to reduce power generation costs.
Electricity can be transmitted across borders using high-voltage transmission lines and advanced grid systems. These interconnected systems form regional power pools or energy trading markets.
Why Countries Share Energy
1. Energy Security
Energy sharing ensures that a country does not face severe shortages. If one country experiences power plant failure or fuel shortage, it can import electricity from a neighboring country.
2. Cost Reduction
Some countries generate electricity at lower costs due to:
- Cheap fuel
- Hydropower resources
- Renewable energy
- Large-scale power plants
Instead of building expensive plants, importing electricity can be cheaper.
3. Renewable Energy Integration
Renewable energy sources like solar and wind are not always stable. If one country has excess solar power during the day, it can export it to another country where demand is high.
4. Environmental Benefits
Sharing clean energy helps reduce carbon emissions. Countries with hydropower or renewable energy can export clean electricity to reduce regional pollution.
5. Economic Cooperation
Energy sharing strengthens political and economic relationships between neighboring countries and promotes regional development.
How Electricity Is Shared Between Countries
Electricity sharing requires complex infrastructure and coordination. Here is how the process works step by step.
Step 1: Power Generation
Electricity is generated in power plants such as:
- Coal power plants
- Gas power plants
- Hydropower plants
- Nuclear power plants
- Solar and wind farms
If a country produces more electricity than it needs, the surplus can be exported.
Step 2: High-Voltage Transmission Lines
Electricity is transmitted through high-voltage transmission lines across borders. These lines reduce energy losses during long-distance transmission.
Common transmission systems:
- HVAC (High Voltage Alternating Current)
- HVDC (High Voltage Direct Current)
HVDC is often used for long-distance and cross-border power transmission because it has lower losses and better control.
Step 3: Grid Interconnection
Both countries must connect their national grids through substations and transmission lines. This process is called grid interconnection.
Important components:
- Substations
- Transformers
- Circuit breakers
- Protection systems
- Control and monitoring systems
Step 4: Synchronization
If two countries use AC power, their grids must be synchronized in:
- Frequency (50 Hz or 60 Hz)
- Voltage level
- Phase angle
If synchronization is difficult, HVDC systems are used to connect two grids without synchronization.
Step 5: Energy Trading Agreements
Countries sign agreements that define:
- Electricity price
- Supply duration
- Transmission cost
- Payment terms
- Emergency support
Power can be traded through long-term contracts or real-time electricity markets.
Step 6: Monitoring and Control
Control centers monitor:
- Power flow
- Grid stability
- Voltage and frequency
- Load demand
Advanced SCADA and smart grid systems are used for safe operation.
Technologies Used in Cross-Border Energy Sharing
1. HVDC Transmission
High Voltage Direct Current (HVDC) is widely used for international power transfer.
Advantages:
- Lower transmission losses
- Suitable for long distances
- Better control of power flow
- Connects unsynchronized grids
2. Smart Grid Systems
Smart grids use digital communication to monitor and manage electricity flow efficiently between countries.
3. Energy Storage Systems
Battery storage systems help balance supply and demand during cross-border trading.
4. Substations and Converter Stations
Converter stations convert AC to DC and DC to AC in HVDC systems. These are essential for international energy transfer.
Global Examples of Energy Sharing
Europe
European countries share electricity through a unified grid. Countries like France export nuclear power to Germany and Italy.
North America
The United States and Canada exchange electricity regularly, especially hydropower from Canada.
Asia
Countries like China, Laos, Thailand, Bangladesh, and India are developing regional energy-sharing networks.
Bangladesh and India Power Sharing: A Successful Example
Energy cooperation between Bangladesh and India is one of South Asia’s most important power-sharing partnerships.
Why Bangladesh Imports Electricity
Bangladesh has growing electricity demand due to:
- Industrial growth
- Urbanization
- Population increase
Although Bangladesh produces electricity from gas, coal, and solar, demand often exceeds supply. Importing electricity helps maintain stability.
India’s Role
India has large power generation capacity from:
- Coal plants
- Hydropower
- Renewable energy
- Nuclear power
India exports electricity to Bangladesh to support its growing demand.
Major Bangladesh–India Power Transmission Projects
1. Bheramara–Baharampur HVDC Link
This is the first cross-border electricity connection between Bangladesh and India.
Key details:
- Capacity: 500 MW initially
- Expanded to: 1000 MW
- Type: HVDC transmission
- Voltage: 400 kV
Electricity flows from India’s Baharampur substation to Bangladesh’s Bheramara substation.
2. Tripura–Comilla Power Link
Electricity is supplied from India’s Tripura state to Bangladesh’s Comilla.
Capacity:
- Around 160 MW
This project supports eastern Bangladesh.
3. Future Expansion
Bangladesh plans to import more electricity from India and Nepal through regional energy cooperation.
Benefits of Bangladesh–India Energy Sharing
1. Reliable Power Supply
Power import helps Bangladesh avoid load shedding and maintain stable supply.
2. Cost Efficiency
Importing electricity is sometimes cheaper than building new power plants.
3. Regional Cooperation
Energy sharing strengthens diplomatic and economic ties between Bangladesh and India.
4. Renewable Energy Opportunities
Future plans include importing hydropower from Nepal and Bhutan through India.
Challenges in Cross-Border Energy Sharing
1. Political Issues
Political tension between countries can affect energy agreements.
2. Infrastructure Cost
Building transmission lines and substations requires huge investment.
3. Grid Stability
Managing frequency and voltage across borders is complex.
4. Pricing and Agreements
Electricity pricing must be fair and transparent.
Future of International Energy Sharing
The future of global energy sharing is moving toward:
- Renewable energy trading
- Smart grids
- Regional power pools
- Clean energy exchange
- Battery storage integration
South Asia is planning a regional power grid connecting:
- Bangladesh
- India
- Nepal
- Bhutan
This will allow hydropower from Nepal and Bhutan to reach Bangladesh through India.
Conclusion
Energy sharing between countries is becoming essential for modern power systems. It improves energy security, reduces costs, and supports renewable energy development. Through advanced technologies like HVDC transmission and smart grids, countries can efficiently exchange electricity across borders.
The Bangladesh–India power-sharing partnership demonstrates how regional cooperation can solve energy shortages and support economic growth. As demand for electricity continues to rise, cross-border energy trading will play a crucial role in building a stable and sustainable global energy future.
For developing nations like Bangladesh, international energy sharing is not just an option — it is a necessity for reliable and affordable power in the years ahead.