Energization of Complete Nho Quan - Phu Ly - Thuc Tin 500/220 kV Transmission Line: Key Power Transmission Project in Northern Vietnam
At 11:35 AM on July 26, 2026, the National Power Transmission Corporation (EVNNPT) announced the successful energization of the entire Nho Quan - Phu Ly - Thuc Tin 500/220 kV transmission line project. This project is considered one of the most important power transmission works, holding significant meaning for the power system in northern Vietnam, ensuring energy security and socio-economic development.
Project Overview
The Nho Quan - Phu Ly - Thuc Tin 500/220 kV transmission line project was implemented with the objective of enhancing power transmission capacity from hydropower plants in northern Vietnam to southern regions, particularly to industrial provinces and cities such as Hanoi, Hung Yen, Ha Nam, and surrounding areas.
The project spans a total length of 185 km, passing through 5 provinces: Ninh Binh, Ha Nam, Hung Yen, Thai Binh, and Hanoi. The project consists of two main lines:
- 500 kV line: Nho Quan - Phu Ly - Thuc Tin
- 220 kV line: Phu Ly - Thuc Tin
Construction began in March 2024 and was completed on schedule after 2 years and 4 months of construction, with a total investment of approximately 5,200 billion VND.
Project Implementation Partners
The project was implemented through close coordination of multiple units under Vietnam Electricity (EVN):
- National Power Transmission Corporation (EVNNPT): Overall project management unit
- Project Management Board of Northern Power Projects (NPMB): Direct management and implementation oversight unit
- National Power System Operation and Electricity Market Joint Stock Company (NSMO): Power system operation unit after project commissioning
- Bac Giang Power Transmission Company, Hanoi Power Transmission Company, Ninh Binh Power Transmission Company: Construction units for line sections under their respective jurisdictions
Significance and Importance of the Project
The completion and commissioning of the Nho Quan - Phu Ly - Thuc Tin 500/220 kV transmission line bring several important significances:
- Enhanced Power Transmission Capacity: The project increases power transmission capacity from northern to southern regions by 1,200 MW, addressing overload situations on existing transmission lines.
- Energy Security Assurance: Creates an additional backup transmission route, increasing the reliability of the northern power system, especially during the dry season when hydropower output decreases.
- Socio-Economic Development Support: Ensures stable power supply for key industrial zones and densely populated residential areas along the transmission line.
- Reduced Energy Losses: With higher transmission voltage and a more direct route, energy losses on the line are reduced by approximately 3-5% compared to existing lines.
Detailed Technical Specifications of the Project
| Parameter | Details |
|---|---|
| Voltage Level | 500 kV and 220 kV |
| Total Length | 185 km |
| Number of Towers | 465 towers (steel towers) |
| Conductors | ACSR 400/35 aluminum conductors |
| Transmission Capacity | 1,200 MW |
| Design Wind Speed | 35 m/s |
| Ice Thickness | 15 mm |
Challenges During Implementation
The project faced numerous difficulties and challenges during implementation:
- Complex Terrain: The transmission line passes through various terrains from mountains to plains, requiring appropriate design and construction solutions.
- Agricultural Production Impact: Part of the line passes through rice cultivation and crop areas, requiring rapid and transparent compensation and resettlement work.
- Severe Weather: The rainy and stormy season in 2025 affected construction progress, requiring flexible construction methods.
- Occupational Safety: With the project's large scale and height of transmission towers, ensuring occupational safety was a top priority.
Operation and Development Plans for the Future
After completion and commissioning, the Nho Quan - Phu Ly - Thuc Tin 500/220 kV transmission line will be connected to existing power plants and future power projects:
- Connection with Hoa Binh, Son La, and Tuyen Quang hydropower plants to transmit power to southern regions
- Support for solar power and wind power projects being implemented in northern provinces
- Create conditions for developing new industrial zones along the transmission line
Mr. Nguyen Van Hung, General Director of EVNNPT, stated: "The completion of the Nho Quan - Phu Ly - Thuc Tin 500/220 kV transmission line project is an important step in Vietnam's national power system development strategy. We will continue to accelerate the progress of other key transmission projects to ensure national energy security in the coming years."
Conclusion
The successful energization of the complete Nho Quan - Phu Ly - Thuc Tin 500/220 kV transmission line is not only a significant achievement of Vietnam's power industry but also a testament to the capacity and professionalism of units within the industry. This project will contribute significantly to ensuring energy security, promoting socio-economic development, and improving the quality of life for people in northern Vietnam.
The project also affirms the commitment of the Government and the power industry in modernizing the national power system, aiming for sustainable development goals and effective response to climate change.