Yongfu possesses advanced technology in substation, transmission line works, distribution networks and power internet and broad experiences in project management, covering voltage range from 220V to ±1100kV. Yongfu is the only private enterprise in China that provides survey and design services for ultra-high voltage (UHV) transmission line and substation projects.

TL&SS Works

We provide solutions for AC & DC overhead transmission lines, submarine & land cables, bridge cables and smart substations for all voltage levels.

transmission line projects at 220kV and above

15000+km

220kV Transmission Line

9000+km

330kV, 500kV Transmission Line

4000+km

substations of 220kV and above

250+

Overhead Transmission Line

Our track records include construction of UHV AC/DC overhead transmission line projects, we are leading the way in project management,application of international standards and core technologies in power industry (e.g. pole & tower design, lightning protection technology, wind resistance technology,offshore large-span design technology, UAV route selection technology, aerial route selection，geographical elevation data modeling technology,3D digital design technology, full-process consulting services, etc.).
HV Cable

We provided solutions for construction of various HV cable transmission line projects, including land cables, submarine cables, and bridge cables, with capabilities in application of international standards and experience in performing power transmission project using cables. We are leading the way in technologies e.g.flexible DC cable design, 220KV copper wire armored cross-linked polyethylene submarine cable, HV large-section 3-core composite optical fiber submarine cable, bridge cable expansion device, large-diameter ultra-long-distance pipe jacking tunnel technology,HV submarine cable protection technology, etc.
Smart Substation

We provided solutions for construction of UHV smart substations, with capabilities in application of international standards We provide database support, architectural renderings, simulation, etc.. We are leading the way in 3D digital technology, multi-station integration technology, digital design technology of substation secondary electrical system, smart substation control cabinet, environmental control technology, etc.

Typical Cases

Changji-Guquan ±1100kV UHV/DC Transmission Line Project, China

The UHV power transmission project with highest voltage level, largest transmission capacity, longest distance and most advanced technology in the world.

Fuzhou-Xiamen1000kV (AC) UHV Power Transmission Project, Fujian, China

The UHV power transmission project in China for which large-scale mechanized construction was applied in mountainous terrain for the first time and double-circuit angle steel towers were adopted.

Hami-Chongqing±800kV (DC) UHV Power Transmission Project, China

China's first commissioned UHV DC power transmission project evacuating electricity from Gobi desert renewable energy base to Southwest China.

Changtai 1000kV Substation Project, Fujian, China

The second UHV substation project in Fujian Province, China, which was granted the title of 2025 China's high-quality electrical power project.

Zhangzhou Nuclear Power Plant 220kV Transmission Line Project, Fujian, China

A BOP project for "Hualong one" nuclear power plant.

NGCP 230kV Lumban Substation Main Transformer Upgrade Project, South Luzon, Philippines (EPC)

A regional hub substation upgrading project, adding 100MVA transformer capacity to meet renewable energy demand in southern Luzon, the Philippines, serving as model of international cooperation for renewable energy project.

Yazhong 500kV Substation Project, Xizang, China

It is one of the Central Xizang grid interconnection projects that has highest altitude, largest altitude range and most complicated natural conditions.

Xiamen +320kV Pilot Flexible DC Power Transmission Project (DC Cable Package), Fujian, China

It is the world's first flexible DC power transmission project where true bipolar wiring was adopted with voltage and capacity reaching highest international standards and it received the first prize of National Excellent Engineering Consulting Achievement Award and the first prize for Excellent Engineering Consulting Achievement in Electric Power Industry.

Huatang-Zhuyu 220kV Transmission Line, Fujian, China

It is a transmission line project that high-voltage cable was laid for the first sea-crossing bridge built in Fujian Province, which received the first prize for Outstanding Engineering Consulting Achievements Award in Electric Power Industry.

Missan Oilfield 132kV Power Transmission and Substation Project, Iraq

The first 132kV digital substation in Missan Oilfield, Iraq.

Minguang 220kV Power Transmission and Substation Project, Fujian, China (EPC)

It is a key infrastructure for Luoyuan Minguang Steel Capacity Replacement Project.

Yukun Steel Plant TL & Substation Project, Yunnan, China (EPC)

It is the "top priority" project for Yukun Steel's green power transformation, a total of 26 power transformers of eight 110kV substations and one 220kV substation were commissioned in 13 months.

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