500kV Jinjiang–Dayuan, Jinjiang–Putian–Ziling Substation Project

Project Overview

The 500kV Jinjiang–Dayuan, Jinjiang–Putian–Ziling Substation Project is a key regional transmission development effort designed to support the stability and efficiency of the power grid in Fujian Province. This initiative links Jinjiang with Dayuan, Putian, and Ziling substations through a high-voltage transmission corridor, helping to accommodate increasing power demands and enable balanced energy distribution.

The project spans approximately 120 kilometers and involves the installation of around 160 steel transmission towers. The line traverses a range of landscapes—including urban environments, farmlands, and hills—necessitating diverse construction strategies and careful route planning to minimize environmental and social impact.

Construction Plan & Execution

1. Route Planning & Environmental Considerations

Extensive field surveys and GIS-based route modeling were conducted to optimize tower locations, reduce disruption to communities, and ensure compliance with land use and ecological guidelines. Special attention was given to preserving cultivated areas and minimizing proximity to residential zones.

2. Foundation Engineering & Tower Erection

Several foundation types were selected based on site-specific conditions:

• Pile foundations were applied in soft soil areas for increased structural integrity.

• Shallow foundations were used where terrain stability allowed for cost-effective installation.

• Rock anchor systems were adopted in elevated or rocky locations for improved load-bearing performance.

Lattice steel towers were chosen for their adaptability and strength, particularly in regions prone to strong winds or high humidity. Where accessibility was limited, aerial installation techniques, including helicopter-assisted lifting, were adopted to reduce environmental disturbance.

3. Conductor Stringing & Installation

Conductors were installed using tension-controlled stringing methods to ensure optimal sag and tension balance. Anti-corrosion treatments were applied to protect metallic components in high-moisture zones, particularly near the coastline. Insulators and fittings were selected for their high mechanical reliability and long-term environmental resistance.

4. Environmental Safeguards

Mitigation measures included erosion control on sloped sites, noise and dust suppression during construction, and wildlife-friendly routing to reduce interference with local habitats. Post-construction land restoration was implemented along the route, ensuring alignment with local environmental standards.

Design & Technical Services

Our team provided integrated design services, focusing on system performance, resilience, and compatibility with existing grid infrastructure:

• Electrical Design & Grid Modeling

Comprehensive power flow studies were conducted to validate system performance and ensure compatibility with the existing 500kV network. Load forecasting and contingency analysis supported long-term planning and safe operation.

• Structural Design & Customization

Towers were engineered based on wind, seismic, and ice-loading data relevant to Fujian’s geography. Materials with enhanced corrosion resistance were used to meet regional durability needs.

• Smart Grid Integration

The project included provisions for intelligent grid functions such as:

• Real-time remote monitoring via SCADA systems

• Digital fault diagnosis and predictive maintenance technologies

• Grid automation interfaces for improved operational control

• Electromagnetic Safety & Community Considerations

EMF impact assessments were conducted to ensure the line’s design met public health and safety standards, with transmission corridors routed at safe distances from densely populated areas.

After-Sales Services & Technical Support

1. Routine Maintenance Programs

• Periodic inspections of tower foundations, structural integrity, and line clearances

• Corrosion control assessments and recoating services

• Condition-based conductor performance evaluations

2. Emergency Response Support

A rapid-response mechanism is in place for addressing:

• Storm-related infrastructure damage

• Unexpected grid faults

• Temporary rerouting needs for uninterrupted service

3. System Upgrades & Flexibility

Support is available for:

• Load capacity scaling through conductor and substation upgrades

• Integration of distributed renewable energy sources

• Technology enhancements to align with evolving grid standards

4. Training & Knowledge Transfer

We provide hands-on training and digital workshops to support utility partners with:

• System operation best practices

• Maintenance procedures

• Fault diagnosis and response simulations

Conclusion

The 500kV Jinjiang–Dayuan, Jinjiang–Putian–Ziling Substation Project contributes to the ongoing enhancement of the region’s energy infrastructure. Through careful planning, adaptable engineering solutions, and reliable technical services, this project supports a robust and scalable transmission framework that aligns with long-term regional development goals.

For customized transmission solutions, engineering consultation, or maintenance partnerships, feel free to contact our team.