The most important weapon of the country, fighting for the sea

recently

The world's first 16MW offshore wind turbine

Completed the hoisting in Fujian waters

This is the largest wind turbine built in the world.

01

How big is it?

This 16 MW wind turbine is located in the coastal area of ​​Fujian

About 35 kilometers from the coast

The hub of the wind turbine is 152 meters above sea level.

Equivalent to a 50-story building

Impeller diameter 252 meters

The impeller swept area is about 50,000 square meters

Equivalent to the area of ​​7 standard football fields

Blade length 123 meters

Can accommodate 300 adults standing side by side

02

It achieved a breakthrough in localization

This 16MW wind turbine core key components

All have achieved 100% localization

The spindle bearing is over

my country cannot develop and manufacture ultra-large capacity

History of offshore wind turbine main contractors

The main shaft bearing is the core component of the wind turbine

Once a failure occurs

The impeller will not turn

Most of the ultra-large capacity offshore wind turbines are located in offshore areas

Once repaired and replaced, it is almost equivalent to rebuilding

Reliability is the key to all offshore wind turbines

Common problems faced by spindle bearings

In the industry

Service life of offshore wind turbine main shaft bearings

Usually 20 years

The 16 MW offshore wind turbine

Achieved innovation in product design and process manufacturing

Service life extended to 25 years

03

How does it light up millions of homes?

When the sea breeze blows the impeller

The impeller drives the generator in the nacelle to generate electricity

Converting wind energy into electricity

The voltage is very low at this time

Cannot meet the requirements of grid access

Requires submarine cables

Send electricity to offshore booster station for boosting

The relevant person in charge of the Fujian branch of China Three Gorges Corporation introduced

“The offshore booster station is equivalent to the heart of the human body.

Gather all the electricity and boost it to 220 kV

Then it is sent to the power grid via submarine cables.”

The process of laying submarine cables is like sowing wheat

Construction vessel lays plow through submarine cable

Draw a 2-3 meter deep cable trench on the seabed

Put the submarine cable into the cable trench and bury it

Offshore wind farm electricity

As this "invisible channel" is sent to thousands of households

Next step is to complete the installation of the wind turbine

Will enter the debugging and testing phase before grid connection

It is expected to be connected to the grid and generate electricity in early July.

According to calculations, under rated conditions

A single unit can generate about 34 degrees of electricity per rotation.

An average of 66 million kWh of clean electricity can be generated each year

It can meet the normal electricity consumption of 36,000 families of three for one year.

The most important weapon of the country, fighting for the sea

Tribute to the great builders

Salute to the amazing Chinese power

▌Source of this article: CCTV News WeChat Official Account (ID: cctvnewscenter)

Producer/Wang Xingdong Editor-in-Chief/Zhang Zhida

Editor/Li Juan Video Editor/Liu Zheyuan

Proofreading/Gao Shaozhuo