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"Actually, there is another technology in our electric power department called ultra-high voltage electricity. It's just that the research is not mature yet, but we already have some ideas and technical reserves. If ultra-high voltage can be built, it is equivalent to building the power system. By then, both the efficiency of power usage and the utilization rate will increase many times.”

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

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

Zhou Wan nodded and looked at Jiang Xiaobai. Jiang Xiaobai also nodded with a smile, of course he knows about UHV.

UHV technology is also the most advanced in China globally. The reason why Jiang Xiaobai didn't say it now is because the UHV technology has not yet been realized. Jiang Xiaobai's impression is that in the past two or three years, the word UHV appeared.

But he didn't know when the UHV technology was 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 still immature in the store department. , it is a confidential matter internally, only a few people know it, and you know it now.

Where did you know that?

"Continue to talk about this UHV technology in detail, and let us popularize it." Zhou Wan said, although he said that he is in charge of the science and technology department, but it is impossible to know all the technologies, especially the electric power department. Things, people are self-contained, and many things do not go through the technology department.

So he also wants to know, if the new energy uses electricity, then the matter related to electricity must be clarified.

"Okay," the power 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 and 380v. I don't need to go into details about it. The socket at home is this voltage. , Intuitively, let’s use the battery to make a comparison. The voltage of a No. 5 battery is 50mm in height, so the voltage of 220v is equivalent to 147 No. 5 batteries connected in series for a total of meters, which is about the height of two floors; the medium voltage is 10kv , 35kv, this voltage is the voltage of the distribution network, that is, the voltage of the overhead line that can be seen in the community, and if it is compared with the battery, the length is slightly lower than the Empire State Building."

Jiang Xiaobai, Zhou Wan, and Zheng Qingyun all nodded when they heard it. The introduction of the electric power director was still very easy to understand.

"The high voltage is 110kv and 220kv. This voltage level is an ambiguous voltage level. Both the large power grid and the distribution grid..."

The electric director said, Jiang Xiaobai joked in his heart, 110kv is 110,000 volts, and Pikachu's skill of 100,000 volts is 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 it is replaced by the length of the battery, it is basically the altitude of the cruising plane..."

"The ultra-high voltage is even more powerful, AC 1000kv, DC 800kv, replaced by batteries for 33 kilometers..."

It has to be said that the electric 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 the transmission loss. Let me use an analogy, the same line, 10kv can deliver 10 megawatts , 1000kv may be able to deliver 1000 megawatts; in addition, the higher the voltage, the higher the efficiency. If you generate 100 kilowatt-hours of electricity, you may have 50 degrees left when you use 10kv to transmit 100 kilometers. If you use 1000kv to transmit 1000 kilometers, you still have 90 degrees.

Of course, this data is inaccurate, but the meaning, that's what it means..."

Zhou Wan's eyes 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, in his previous life, he had heard about this Niubi technology.

That's right, this technology is very good, and there are very few people in the world who can do this technology.

Of course, it doesn’t mean that this technology can’t be researched by other countries, but that it’s useless for other countries to research this technology, so I don’t work hard on research, but it’s different in China.

This technology can be used in China. There are two conditions for this technology to be used. One is the first: electric energy needs to be transmitted over a long distance;

The second condition is that electric energy needs to be transmitted on a large scale. That is economic prosperity.

For example, the empire on which the sun never sets is very powerful, a veteran capitalist power. In the birthplace of the Industrial Revolution, how high is the highest voltage level? 400kv has just entered the threshold of our ultra-high voltage, there is no way, the place is small and unnecessary.

Besides, in the north, the land area can be considered to be very large, the largest in the world, spanning the Eurasian continent. When Big Brother was still very good, he built a UHV experimental line and operated it for 5 years. . . Buck up.

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

But it is different in China. With the conditions for building UHV, the distribution of energy in our country is too uneven, and it is just the opposite of the economy.

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

Or, build a railway to transport thousands of kilometers of coal from the northwest to the southeast coast. Or, build a power line, burn the coal locally, and send the electricity over.

The former is an old method we have used for decades, and the most famous one is probably the Daqin Railway. He connected Jin Province and the Beijing-Tianjin-Hebei region, and his main job was to transport coal. The annual freight volume can reach 100 million tons, and a train is 5 kilometers long. In contrast, a high-speed rail with 8 carriages is only about 200 meters long.

However, this method has a lot of disadvantages, first: this method can only transport coal, but what about the wind power in Northwest China and photovoltaics? That thing can’t be transported; second: what if the railway can’t transport it?

The rest is to build UHV, so regardless of whether UHV technology is mature or not, it will be imperative in the future.