Project Overview

The 1000kV Yuheng-Weifang Ultra-High Voltage (UHV) AC Power Transmission and Transformation Project is a critical component of China’s national air pollution control program and a key part of the country’s “Four AC, Four DC” transmission strategy. As the fifth approved UHV AC transmission line, this project strengthens the North China power grid, enabling large-scale clean energy transmission from Shaanxi and Shanxi to eastern China.

The project includes:
• 1000kV ultra-high voltage AC transmission lines, ensuring long-distance, high-capacity electricity transmission.
• Multiple transformation substations to regulate voltage levels for efficient distribution.
• Advanced grid protection and stability systems to enhance network reliability.

By linking the energy bases of Shaanxi and Shanxi with the power-demanding regions of mid-eastern China, this project:
• Optimizes resource allocation across provinces.
• Reduces reliance on coal-fired power generation in the east, lowering emissions.
• Enhances grid security by integrating UHV AC and DC transmission technologies.
Construction Plan & Execution

1. Route Planning & Site Preparation

The transmission corridor was carefully planned based on:
• Geological surveys to identify optimal tower locations.
• Environmental impact assessments to minimize disruption to ecosystems.
• Land use coordination to ensure smooth construction in urban and rural areas.

The line passes through a mix of mountainous terrain, plains, and industrial zones, requiring specialized foundation and installation techniques.
2. Tower Erection & Structural Engineering

Due to the high-voltage capacity and long-span requirements, the transmission towers are designed with:
• Ultra-high-strength steel structures to withstand extreme weather conditions.
• Advanced aerodynamic designs to reduce wind resistance and mechanical stress.
• Corrosion-resistant coatings to extend lifespan, especially in high-humidity regions.

Tower foundation types include:
• Deep-pile foundations in soft soil and floodplain areas.
• Rock-anchor foundations in mountainous regions.
• Reinforced concrete bases for high-stability zones.

Helicopter-assisted tower assembly was used in hard-to-reach locations, ensuring efficient and safe construction.
3. Conductor Installation & Stringing

The project features state-of-the-art transmission conductors designed for low-loss, high-efficiency power transmission. Key aspects include:
• Ultra-high-voltage insulation technology to prevent flashovers.
• Tension stringing techniques for precise conductor alignment.
• High-performance polymer insulators for enhanced electrical and mechanical reliability.

The use of real-time weather monitoring systems helped adjust stringing schedules, ensuring safety and efficiency during installation.
4. Substation Construction & Grid Integration

Multiple 1000kV transformation substations were built to regulate power flow and integrate the UHV AC line into the national grid. These substations include:
• High-efficiency transformers for stable voltage regulation.
• Reactive power compensation systems to manage grid fluctuations.
• Digital relay protection and automation for fast fault detection and response.

By coordinating with existing UHV DC transmission lines, this project enhances grid resilience and improves energy distribution efficiency.
Design & Technical Services

1. Power System Optimization

Our engineering team conducted in-depth grid studies and simulations, including:
• Load flow analysis to optimize power distribution.
• Harmonic filtering and reactive power control to improve power quality.
• Electromagnetic compatibility (EMC) solutions to prevent interference with other grid components.

2. Smart Monitoring & Control

The project integrates advanced digital monitoring technologies, such as:
• SCADA (Supervisory Control and Data Acquisition) systems for real-time grid monitoring.
• AI-driven predictive maintenance systems to detect potential faults before they occur.
• Automated relay protection to prevent cascading failures in case of grid disturbances.

3. Environmental & Safety Measures

To ensure sustainable construction and operation, we implemented:
• Low-impact routing strategies to protect forests, rivers, and urban areas.
• Noise reduction measures at substations and transmission corridors.
• Bird protection devices to minimize wildlife disruption.
After-Sales Service & Maintenance

1. Routine Inspection & Preventive Maintenance

To ensure long-term performance, we provide comprehensive maintenance services, including:
• Transformer oil and insulation testing to prevent equipment degradation.
• Regular tower and line inspections using drones and infrared imaging.
• Weather-resilient cleaning programs to remove dust and debris from insulators.

2. Emergency Response & Rapid Repair

Our 24/7 emergency response team is ready to address any system faults, including:
• Voltage instability or transmission disruptions.
• Equipment damage due to lightning or extreme weather.
• Relay protection misoperations or cybersecurity threats.

3. Future Grid Expansion & Upgrades

To accommodate increasing power demand, we offer:
• Capacity expansion plans with next-generation transformers and conductors.
• Integration with energy storage systems for better load balancing.
• Smart grid enhancements using AI and IoT-driven technologies.

4. Training & Technical Support

We provide:
• On-site and remote training sessions for power system operators.
• Customized maintenance workshops for utility personnel.
• Continuous technical assistance through digital platforms.

The 1000kV Yuheng-Weifang UHV AC Power Transmission and Transformation Project is a landmark initiative in China’s clean energy transition and grid modernization efforts. By enabling long-distance, high-efficiency power transmission, this project supports national energy security, reduces emissions, and enhances grid stability.

With advanced engineering, smart monitoring systems, and dedicated after-sales services, we ensure the long-term success and reliability of this critical infrastructure.

For inquiries about UHV AC transmission solutions, engineering services, or maintenance support, please contact us today!