Project Overview

The 1000kV Yuheng–Weifang Ultra-High Voltage (UHV) AC Power Transmission and Transformation Project is part of China’s broader initiative to improve air quality and enhance long-distance electricity transmission. As the fifth approved UHV AC transmission project under the national “Four AC, Four DC” strategy, it supports the development of the North China power grid and promotes the delivery of cleaner energy from Shaanxi and Shanxi to eastern regions.

Key components of the project include:

• 1000kV UHV AC transmission lines for long-distance power transfer

• Transformation substations to manage voltage levels for regional distribution

• Grid protection and system stability equipment to support reliable operation

By connecting western energy production areas with mid-eastern demand centers, the project:

• Contributes to the coordinated allocation of energy resources across regions

• Supports efforts to lower emissions by reducing dependence on coal-based power in the east

• Enhances the flexibility of the power grid through UHV AC and DC technology coordination

Construction Plan & Execution

1. Route Planning & Site Preparation

The transmission corridor was developed based on:

• Geological surveys to guide tower placement

• Environmental impact assessments to reduce ecological disruption

• Land use coordination with local authorities in both urban and rural areas

The route spans a variety of terrains—including mountainous zones, plains, and industrial areas—requiring the application of terrain-specific construction methods.

2. Tower Erection & Structural Engineering

To meet voltage and span requirements, towers were designed with:

• Steel lattice structures rated for high mechanical loads

• Wind-resistant profiles to help mitigate mechanical stress

• Protective coatings designed to improve durability in humid climates

Foundation types were selected based on local conditions:

• Deep-pile foundations in soft or flood-prone soils

• Rock-anchor foundations for mountainous areas

• Reinforced concrete foundations in high-stability regions

In remote areas, helicopter-assisted tower installation was adopted to improve construction efficiency and safety.

3. Conductor Installation & Stringing

The project employed conductors selected for performance in high-voltage applications. Key techniques included:

• Insulation systems designed to reduce flashover risk

• Tension stringing methods to maintain alignment accuracy

• Use of polymer insulators for their insulating and mechanical properties

Weather monitoring systems supported safe and timely installation by adjusting schedules according to environmental conditions.

4. Substation Construction & Grid Integration

Several 1000kV substations were constructed to support voltage regulation and connect the line to the broader grid. These facilities feature:

• Power transformers for voltage management

• Reactive power compensation devices to assist with grid balance

• Automated relay and protection systems for fault monitoring and response

Integration with existing UHV DC lines supports grid operation and resource coordination.

Design & Technical Services

1. Power System Optimization

The engineering team carried out power system analysis and simulation, including:

• Load flow studies to support network configuration

• Harmonic filtering and reactive power control to manage power quality

• EMC (Electromagnetic Compatibility) measures to reduce interference risks

2. Smart Monitoring & Control

The system incorporates digital technologies for monitoring and control, such as:

• SCADA systems for centralized operation

• Predictive maintenance tools for early fault identification

• Relay protection automation to respond to disturbances promptly

3. Environmental & Safety Measures

Sustainability and operational safety were integrated into planning and implementation through:

• Route design strategies to avoid sensitive ecological areas

• Noise mitigation solutions for substations and transmission corridors

• Bird diverters and other protective devices to reduce wildlife interaction

After-Sales Service & Maintenance

1. Routine Inspection & Preventive Maintenance

Scheduled maintenance services include:

• Transformer testing and oil analysis to monitor equipment condition

• Line inspections using aerial drones and thermal imaging

• Cleaning routines adapted to local climate conditions for insulator upkeep

2. Emergency Response & Rapid Repair

A response team is available to address operational incidents such as:

• Power flow disruptions or voltage anomalies

• Weather-related equipment impacts

• Protective relay or communication system issues

3. Future Grid Expansion & Upgrades

In response to future energy demand, services are available to support:

• Capacity enhancements through upgraded transformers and conductors

• Integration of energy storage to improve system balance

• Application of AI and IoT technologies for smarter grid management

4. Training & Technical Support

Support services include:

• On-site and virtual training for system operators

• Customized workshops for maintenance teams

• Technical consultation and support via digital platforms

Conclusion

The 1000kV Yuheng–Weifang UHV AC Power Transmission and Transformation Project contributes to China’s efforts to modernize its power infrastructure and expand the use of lower-emission energy sources. By supporting long-distance power transfer and coordinated grid development, the project facilitates regional energy balance and supports future system adaptability.

For information about UHV AC transmission technologies, engineering services, or maintenance support, please feel free to contact us.