"Actually, our electric power sector also has a technology called ultra-high voltage. It's just that it's not mature yet, but we already have some ideas and technical reserves. If ultra-high voltage can be built, it will be equivalent to the construction of ultra-high voltage in the power system.

When the highway is built, both the efficiency and utilization of electricity will be improved many times."

After listening to Jiang Xiaobai's words, the director of the electric power department looked at Zhou Wan and said.

He knew what he, the person in charge of the electric power department, was called to do, and he faithfully played his role, which was to provide some technical analysis on electric power and some possible technical support.

Zhou Wan nodded and looked at Jiang Xiaobai. Jiang Xiaobai also nodded with a smile. Of course he knew about UHV.

UHV technology is also the most advanced in China globally. The reason why Jiang Xiaobai has not spoken out now is because UHV technology has not yet been realized. Jiang Xiaobai’s impression is that it appeared in the past two or three years.

The word for extra high voltage.

But he didn’t know exactly when the UHV technology would mature, so he didn’t bring it up. Fortunately, he didn’t bring it up. Otherwise, it would be embarrassing now. The UHV technology is not yet mature in the store department.

, it is a confidential matter internally, only a few people know about it, and you know it now.

Where did you know that?

"Please continue to talk about this UHV technology in detail and popularize it for us." Zhou Wan said. Although he said he was in charge of the science and technology department, it was impossible for him to know all the technologies, especially the power department.

Things are self-contained, and many things do not go through the science and technology department.

Therefore, he also wanted to know about the use of new energy sources, and the matters related to electricity must be clarified.

"Okay," the electricity director nodded: "To understand UHV, we have to start from the beginning. First we need to understand the concept of voltage. Low voltage is 220v, 380v. I don't need to explain this in detail. The sockets at home have this voltage.

,To be more intuitive, let’s use batteries to make a comparison. The voltage of one AA battery is ,high.

If the degree is 50mm, then the voltage of 220v is equivalent to 147 AA batteries connected in series for a total of meters, which is about the height of two floors; the medium voltage is 10kv or 35kv. This voltage is the voltage of the distribution network, which is what the community can see.

The voltage of the line, if you compare it with a battery, the length is slightly lower than the Empire State Building.”

Jiang Xiaobai, Zhou Wan, and Zheng Qingyun all nodded. The introduction by the power director was very easy to understand.

"High voltage is 110kv, 220kv. This voltage level is an ambiguous voltage level, both in large power grids and distribution networks..."

As the electricity director said, Jiang Xiaobai joked in his mind, 110kv is 110,000 volts, and Pikachu's skill of 100,000 volts is at this level.

"Ultra-high voltage is 330kv, 500kv, 750kv. This voltage level is already the highest voltage level in most countries in the world. If you change the battery length, it is basically the altitude of aircraft cruising..."

"The UHV is even more powerful, AC 1000kv, DC 800kv, 33 kilometers when replaced by batteries..."

It has to be said that the power director is quite capable. In this way, Jiang Xiaobai, Zhou Wan and others have a clear and intuitive impression of UHV.

"Let me talk about the benefits of building UHV again. A simple explanation is that the higher the voltage, the higher the transmission efficiency and the less transmission loss. Let me use an analogy, the same line, 10kv can send 10 megawatts

,1000

KV may be able to send 1,000 megawatts; in addition, the higher the voltage, the higher the efficiency. If you send out 100 kilowatt-hours of electricity, if you use 10kv to transmit 100 kilometers, you may only have 50 kilowatts left. If you use 1,000kv to transmit 1,000 kilometers, you may still have 90 kilowatts.

Of course, this data is inaccurate, but the meaning is this..."

Zhou Wan's eyes suddenly lit up when he heard this, and Jiang Xiaobai also pretended to be surprised, but in fact Jiang Xiaobai knew more about UHV. After all, he had heard about this amazing technology in his previous life.

Yes, this technology is very impressive, and there are very few people in the world who can achieve this technology.

Of course, this does not mean that this outstanding technology cannot be developed in other countries, but it is that other countries have found this technology of little use, so they have not devoted much effort to research it. However, it is different in China.

This technology can be used in China. There are two conditions for using this technology. One is first: electric energy needs to be transmitted over long distances; that is to say, the land is vast and the resources are abundant. Of course, the main reason is the land is large.

The second condition is that electric energy needs to be transmitted on a very large scale, which means economic prosperity.

For example, the Empire on which the sun never sets is a very powerful, old capitalist power. The birthplace of the industrial revolution, what is the highest voltage level? 400kv, it has just entered the threshold of our ultra-high voltage, there is no way, it is not necessary because the place is small.

Let’s talk about the north, which is considered to be very large in terms of land area. It is the largest in the world and spans the Eurasian continent. Big Brother was still very good back then. It built an ultra-high voltage experimental line and ran it for 5 years, and then...

.lowered the pressure.

Yes, you read that right. The voltage has been reduced to 500kv for operation. Why? The economy is not good and there is no need to transmit so much electricity.

But it is different in China. There are conditions for building UHV, and the distribution of energy in our country is too uneven, and it is exactly opposite to the economy.

Coal, wind power and solar energy are all located in the north-central and northwest regions, but the places where electricity is used are on the southeast coast, so there are only two roads.

Either build a railway to transport coal from the northwest for thousands of kilometers to the southeast coast. Or build an electric wire to burn the coal locally and send electricity over.

The former is an old method we have used for decades. The most famous one is probably the Daqin Railway. It connects Shanxi Province and the Beijing-Tianjin-Hebei region. Its main job is to transport coal. The annual freight volume can reach 450 million tons. One train

The train is only 5 kilometers long, compared to an 8-car high-speed train which is only about 200 meters long.

However, this method has major shortcomings. First, this method can only transport coal, but what about wind power and photovoltaics, which are so good in northwest China? That thing cannot be transported; second: what should we do if the railway cannot transport it?
Chapter completed!