Project Overview

The Zhangbei - Zhangnan Double Circuit 500kV Line Project is a key component of the Zhangjiakou Zhangbei, Shangyi, Kangbao 500kV Transmission and Transformation Project, also known as the “Three Power Four Line” Project. This initiative is part of the State Grid Corporation’s strategy to enhance energy-intensive development and establish a major transmission channel for wind power integration into the national grid.

Key Project Highlights
• Voltage Level: 500kV
• Transmission Type: Double Circuit on Same Tower
• Project Significance: Supports renewable energy transmission, particularly wind power
• Regional Impact: Enhances power supply stability in Northern China

This project plays a crucial role in optimizing grid connectivity, improving transmission efficiency, and promoting the large-scale consumption of clean energy resources.
Construction Plan & Execution

1. Route Planning & Environmental Adaptation

The transmission line traverses diverse terrains, including plains, hills, and high-altitude regions, requiring:
• Detailed topographical and geological surveys to ensure optimal tower placement.
• Wind load and extreme weather impact assessments, given the high wind energy zone.
• Environmental and ecological studies to minimize disturbance to grasslands and wildlife habitats.

Advanced GIS (Geographic Information System) modeling was employed to determine the most efficient and environmentally sustainable route.
2. Tower Construction & Foundation Engineering

Given the high-voltage and long-distance nature of the transmission line, the project utilizes:
• Double-circuit steel lattice towers, optimized for high wind resistance.
• Corrosion-resistant materials to withstand extreme temperature variations.
• Aerodynamic designs to reduce the impact of high-altitude winds.

Foundation designs were adapted to various ground conditions:
• Deep-pile foundations in soft and loose soil regions.
• Rock-anchored foundations in mountainous and rocky terrains.
• Reinforced concrete bases for enhanced stability in high-wind zones.

For difficult-to-access areas, helicopter-assisted construction methods were used to improve efficiency and reduce environmental impact.
3. Conductor Installation & Transmission Line Stringing

To maximize power transmission efficiency and stability, the project incorporates:
• High-performance aluminum alloy conductors, reducing energy losses.
• Weather-resistant composite insulators for improved reliability.
• Electromagnetic shielding technologies to minimize interference with nearby infrastructure.

Tension stringing techniques were used to ensure precise conductor alignment, improving overall grid performance and minimizing line losses.
4. Grid Integration & Renewable Energy Support

The transmission line is seamlessly integrated into the regional power grid, enabling:
• Large-scale wind power transmission from Zhangjiakou’s wind farms.
• Improved voltage regulation through advanced reactive power compensation.
• Enhanced grid security with smart protection and automation systems.

This project significantly boosts the region’s renewable energy utilization, aligning with China’s carbon neutrality goals.
Design & Technical Services

1. Power System Studies & Optimization

Our technical team conducted comprehensive grid performance assessments, including:
• Load flow analysis to optimize transmission efficiency.
• Electromagnetic field studies to ensure compliance with safety regulations.
• Stability simulations to prevent voltage fluctuations and grid disturbances.

2. Smart Grid & Digital Control Solutions

To enhance operational reliability and real-time monitoring, the project integrates:
• SCADA (Supervisory Control and Data Acquisition) systems for remote control.
• AI-driven predictive maintenance to detect potential failures before they occur.
• Automated relay protection systems to safeguard the transmission network.

3. Environmental & Safety Compliance

The project incorporates sustainable and safety-first design principles, including:
• Bird flight diverters to protect migratory bird populations.
• Noise reduction technologies to minimize impact on surrounding communities.
• Strict safety protocols, including advanced lightning protection measures.
After-Sales Service & Maintenance

1. Routine Inspection & Preventive Maintenance

To ensure long-term operational reliability, we provide:
• Drone-based transmission line inspections for accurate and efficient monitoring.
• Structural integrity assessments for towers and conductors.
• Corrosion protection maintenance to extend equipment lifespan.

2. Emergency Response & Grid Security

A 24/7 emergency response system is in place to handle:
• Extreme weather conditions such as storms and freezing temperatures.
• Transmission faults or sudden load fluctuations.
• Cybersecurity threats and operational risks.

3. Future Expansion & Grid Upgrades

To accommodate growing energy demands and future grid advancements, we offer:
• Capacity expansion solutions with upgraded transformers and power lines.
• Hybrid AC/DC transmission options for improved efficiency.
• Integration with future renewable energy sources, including solar and offshore wind power.

4. Training & Technical Support

We provide:
• On-site and online training programs for power grid operators.
• Technical workshops on UHV transmission system maintenance.
• Ongoing expert consultation to assist in grid modernization efforts.

The Zhangbei - Zhangnan Double Circuit 500kV Line Project is a strategic infrastructure initiative that plays a vital role in China’s clean energy transition. By integrating large-scale wind power transmission, smart grid technologies, and high-efficiency engineering solutions, the project ensures stable, sustainable, and high-capacity power transmission.

With our expertise in high-voltage transmission, grid optimization, and long-term maintenance, we deliver reliable, cost-effective, and future-ready energy solutions.

For inquiries about power transmission projects, grid solutions, or technical support, please contact us today!