Ultrahigh-voltage Power Superhighway Starts Commercial Operation in China

July 19, 2010
The 800 kV Xiangjiaba-Shanghai UHVDC link has the capacity to transmit up to 7,200 megawatts (MW) of power from the Xiangjiaba hydropower plant in southwest China to Shanghai

The State Grid Corp. (SGCC) completed the Xiangjiaba-Shanghai project, the world's first UHVDC (ultrahigh-voltage direct current) transmission link to go into commercial operation, one year ahead of schedule.

ABB was the main technology supplier to SGCC for project which was completed in 30 months. The scope of delivery included 28 high- and ultrahigh-voltage converter transformers, ten of which were delivered from Sweden and the rest manufactured with ABB components and technology, in local partnership. Other key products delivered include thyristor valves, DC and AC (direct and alternating current) switchyard equipment and the newly developed DCC800 HVDC control system.

The ±800 kV Xiangjiaba-Shanghai UHVDC link has the capacity to transmit up to 7,200 megawatts (MW) of power from the Xiangjiaba hydropower plant in southwest China to Shanghai, the country's leading industrial and commercial center about 2,000 kilometers away. The new link is able to meet the electricity needs of about 24 million people, and sets a new benchmark in terms of voltage levels and transmission capacity, superseding the 600 kV (kilovolt) Itaipu transmission line in Brazil.

The high-capacity power link comprises a single overhead line and occupies less space than the existing system. Moreover, transmission losses on the new line are under 7%, again, considerably less than the existing 500 kV system. The electricity saved is equivalent to the power needs of around one million people in China.

UHVDC transmission is a development of HVDC, pioneered by ABB more than 50 years ago. It is particularly suitable for vast countries like China and India, where consumption centers are often located far from power sources, including renewables.

"800 kV UHVDC will play an important role in providing China with access to remote renewable energy, a key focus area for us," says Zheng Baosen, Executive Vice President, SGCC."We are extremely pleased with the support and co-operation of ABB and the local Chinese suppliers during the execution of this project which enabled its completion in record time."

Popular Sponsored Recommendations

Q&A - Onsite Wind Generation

Jan. 22, 2024
Dive into EWT's Q&A to understand their wind energy solutions, covering partnerships, maintenance, wildlife impact, timelines, solar comparison, and ROI. Essential for sustainable...

SEC Cybersecurity Rules: What’s Your Regulatory Risk?

Feb. 27, 2024
Join us for an insightful exploration of the evolving cyber threat landscape, SEC rule implications, and collaborative strategies to secure critical IT and OT networks in the ...

Five Tips for Choosing the Right AMR to Improve Worker Productivity

Jan. 24, 2024
Here are five top tips to consider before selecting an AMR to increase productivity for your enterprise.

Onsite Wind Generation Guide for C&I

Jan. 22, 2024
This document offers insights into using onsite wind power for businesses, covering feasibility, project development, technology selection, and benefits of renewable energy.

Voice your opinion!

To join the conversation, and become an exclusive member of IndustryWeek, create an account today!