On April 28, a key construction milestone was successfully completed on the Shaanxi–Anhui Ultra-High Voltage (UHV) Transmission Project in Henan Province, China. During the project, advanced stringing equipment developed by Zhengbo Technology, a subsidiary of Xianheng International, provided critical support for precision conductor installation and complex crossing operations.

The project achieved China's first large-scale construction operation involving the crossing of multiple energized UHV transmission lines, setting a new benchmark for complex overhead transmission line construction.

A Strategic Clean Energy Transmission Project

The Shaanxi–Anhui UHV transmission line is a major part of China's long-distance power transmission network. Stretching approximately 1,069 kilometers, the project will connect renewable energy resources in Northwest China with major electricity demand centers in Eastern China.

Once commissioned in 2026, the line is expected to transmit more than 36 billion kWh of electricity annually, with renewable energy accounting for over 50% of the delivered power.

The Henan section of the project, measuring nearly 487 kilometers, plays a critical role in connecting power generation bases with the national transmission network.

Successfully Completing a Highly Challenging Line Crossing Operation

One of the most demanding phases of the project involved crossing three energized UHV transmission lines within a 34-day construction window:

• One 1000 kV AC transmission line
• One ±800 kV HVDC transmission line
• Another 1000 kV AC transmission line

These lines remained in operation throughout the construction process, supplying electricity across multiple provinces. The project team was required to complete more than 60 complex construction procedures while maintaining strict safety clearances and achieving extremely high conductor positioning accuracy.

Due to the unprecedented complexity of the work, the project presented significant technical and operational challenges.

Intelligent Stringing Equipment Ensures Safe and Precise Operations

To meet these challenges, Zhengbo Technology supplied its:

• SA-ZY-2×80 Hydraulic Tensioner
• SA-QY-250 Hydraulic Puller

Both machines are equipped with an intelligent centralized control system that enables real-time monitoring and adjustment during conductor stringing operations.

The system continuously monitors line tension, conductor position, and operating conditions, helping construction teams maintain safe clearance distances from energized transmission lines while ensuring smooth and accurate conductor installation.

By providing precise control throughout the stringing process, the equipment played an important role in ensuring construction safety and efficiency during the crossing operations.

Proven Performance in Real-World UHV Construction

The successful application of the SA-ZY-2×80 Tensioner and SA-QY-250 Puller demonstrated the reliability and performance of Zhengbo Technology's equipment under demanding field conditions.

Throughout the 34-day operation, the equipment supported:

• Precision conductor installation at heights exceeding 150 meters
• Continuous operation in complex crossing environments
• Safe clearance control near energized UHV transmission lines
• Real-time monitoring and coordinated control of stringing operations

The project further validated the capability of Zhengbo Technology's digital stringing solutions for transmission line construction projects up to 1100 kV.

Driving Innovation in Transmission Line Construction Equipment

Zhengbo Technology has been dedicated to the development of transmission line construction equipment and solutions for power utilities and EPC contractors. The company continues to invest in product innovation to improve construction safety, efficiency, and automation.

Its product portfolio includes:

• Digital centralized-control puller and tensioner systems
• Transmission line stringing equipment
• Cable installation equipment
• Hydraulic winches and related construction tools

Looking Ahead

As global demand for power infrastructure continues to grow, Zhengbo Technology will continue expanding its R&D efforts in intelligent stringing equipment and transmission line construction technologies.

By combining advanced engineering, digital control systems, and strict quality standards, the company aims to provide reliable solutions for utility and transmission projects worldwide while contributing to the development of modern energy infrastructure.