China is to get its first high-voltage direct present offshore wind substation.

China has dedicated closely to creating its offshore windpower capability and plans to have 5 GW put in by 2020 – final yr alone it put in virtually 1.2 GW. This introduced the cumulative complete put in capability to almost 2.eight GW, third globally behind the UK and Germany.

However, the nation faces a problem: all of the promising wind farm websites inside 10 km offshore have already been exploited. To increase capability additional and meet the 2020 goal, China is having to discover places which are additional offshore.

To facilitate this, Huadong Engineering Corporation is planning a ground-breaking 1.1 GW offshore windfarm some 90 km off the coast of Jiangsu Province in japanese China.

To help this challenge, Huadong has employed vitality consultants from certification physique DNV GL to provide technical coaching, recommendation and help on their feasibility research on elements of conceptual design and threat evaluation.

Traditional submarine high-voltage alternating present (HVAC) cables turn out to be extraordinarily inefficient when transporting massive quantities of electrical energy over such lengthy distances. In distinction, high-voltage direct present methods permit energy to be transmitted over massive distances underneath the ocean with minimal losses.

Therefore, a key stage within the new challenge would be the creation of an offshore HVDC transmission system to export offshore energy from the windfarm to the mainland, together with offshore HVDC converter station, submarine cables and onshore HVDC converter station. This would be the first offshore voltage-source converter HVDC system in China.

“Offshore HVDC transmission system is a brand new enterprise for DNV GL China and the Asia Pacific area,” stated Haifeng Qi of Huadong Engineering.

“So it’s invaluable to have the ability to name on DNV GL. Their expertise might be a vital consider efficiently delivering a serious new windfarm so removed from land to assist China proceed to prepared the ground in offshore wind era.”

William Pan, head of offshore wind APAC for DNV GL–Energy, stated that in contrast with onshore HVDC know-how, “offshore wind HVDC has distinctive specification and requires to mix each offshore wind and HVDC know-how on the restricted area, to fulfill security and performance requirement”.

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