Coordinates China | How to cross the Qiongzhou Strait

Xiaoxin said

In the past ten years, a series of heavy weapons and super engineering created by central enterprises have engraved new coordinates of national development from different dimensions. On September 12th, the online theme promotion of "our ten years@coordinates China" was officially launched. Over the major achievements of representative infrastructure construction and scientific and technological innovation, it shows the courage, courage and wisdom of challenging the limits and challenging the limit.

Hainan's networking system spans the Qiongzhou Strait. The project is divided into two phases. There are 7 500 kV sea cables in the middle. The single cable is about 30.5 kilometers long. It is the first 500 kV ultra -high voltage, long distance, large -capacity sea floor power project. Today, Xiaoxin brings you the third issue of the "coordinate China" series theme film, "China Surgery" "Capital Qiongxia".

Here, the blue sea and blue sky are connected to the line,

The setting sun is sprinkled on the ferry that comes and go,

People rushed to the beach indulgence.

Here is the Qiongzhou Strait.

When we focus on this,

A "leap" is happening.

Look from the Qiongzhou Strait,

Under this blue ocean,

Set the submarine cable.

They cross the Qiongzhou Strait,

Connect Hainan Power Grid with the main network of South China Power Grid,

Known as the Hainan networking system.

Hainan's networking system is divided into two phases to build,

There are 7 500 kV sea cables in the middle,

A single cable is about 30.5 kilometers long,

It is the first 500 kV in my country

Ultra -high voltage, long distance, large -capacity underwater power engineering,

The construction scale is the first in Asia and the second in the world.

Its investment

The history of "Electricity Island" of Hainan's century,

Realized the connection

Known as Hainan Power Supply

"Life Line" and "Dinghai God Needle".

Click to watch the video

Part1

Create a "lifeline" in the Qiongzhou Strait

Before 2009,

Hainan is still a "electric island",

There are fragile grid structures,

Low power supply safety reliability, low power supply,

Poor disaster resistance and other issues.

In 2005, the Typhoon "David" once created Hainan power facilities.

As a result of the rare province in Hainan's history, power outage.

Under the national network of networking,

The builders of the central enterprise started the construction of the networking system.

And realized in 2009

The first "handshake" of the main network of Southern Power Grid and Hainan Power Grid.

In 2015, in order to meet the construction of the Hainan Free Trade Zone

The need for power protection,

Southern Power Grid has carried out a second -back project construction,

2019,

Hainan's second -time project is officially put into operation,

Further enhance the reliability of Hainan Grid.

As of June 2022,

Hainan's networking system has accumulated a total of over 7.38 billion kilowatt -hours of electricity,

Help Hainan fight against 58 typhoons above 8 times,

It plays a huge guarantee.

Part2

Cross the Qiongzhou Strait from the bottom of the sea

Construction of a connected system on the bottom of the sea is not easy.

Qiongzhou Strait waters are wide,

The sea bed geology is complicated, and the waves are high in water.

The average water depth is 44 meters,

The deepest is 110 meters.

The builder shall be under the premise that there is no experience reference in China,

Solving the two major problems of the Qiongzhou Strait Sea cable,

It has achieved unprecedented breakthroughs in technology.

Complete cable -applying construction in order to safe and quality,

Southern Power Grid Corporation of Southern Power Corporation for the construction of submarine cables at home and abroad

A widely investigated research,

Eventually decided to use the overall construction scheme that was put first and then buried.

In the specific implementation,

The first step is the selection path,

Select safe and comfortable home for submarine cables.

The second step is to lay the layout,

Single continuous length to 30.5 kilometers

Ukraine cable without intermediate joints

Safety and accurate apply to the predetermined location,

Let the submarine cables go to the new home smoothly.

The third step is protection,

Put the "armor" for submarine cables.

After launching the sea cable to the sea bed,

Add a protective layer above,

Avoid being damaged by external forces.

In this process,

Underwater robots have been used,

Catheter precision stone throwing advanced construction technology,

Filled the domestic technology gap,

It is a breakthrough in my country's power construction.

Part3

Guard the "Dinghai God Needle"

Qiongzhou Strait sea conditions are complicated,

There are many past vessels,

It may cause damage to the cable.

In the absence of the reference of mature and reliable operation and maintenance experience,

Southern Power Grid has been explored and accumulated for a long time,

Established a smart seas cable operation and dimension system,

The operation and maintenance of the operation and maintenance of the sea cable transmission project was achieved.

Operation and maintenance sea cable professionals

It is also called "the Southern Navy".

Hainan connected system

"Electric" light up the bright lights on the other side of Qiongya,

Meet the power needs of the people of Hainan,

In the wave of construction of Hainan Free Trade Port,

Write the grand chapter of the new era.

Do you want to know which new era coordinates?

Please continue to pay attention to "coordinate China",

The next issue is equally wonderful!

The next preview

September 16

The fourth issue of the theme film of "Coordinates China" series

China's "Crossing the Desert" will be launched

Stay tuned!

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