Why should high pressure transmission be used for the transmission of electric energy?

Because in the same transmission power.

In this case, the higher the voltage, the smaller the current, so that the high-voltage transmission can reduce the current during transmission, thereby reducing the heat loss due to the current and reducing the material cost of long-distance transmission.

The electricity generated from the power station is generally sent to the various places where electricity is consumed through the transmission line. Depending on the distance of the power to be transmitted, different high voltages are used. From the perspective of China's power situation, the transmission distance is 200 300 kilometers using a voltage of 220 thousand volts; 110 kV at about 100 km; At 15 km and 20 km, 10 kV, 12 kV, and some use 6300 V.

The transmission of electric energy is to reduce the loss on the line, the voltage is high, the current is small, the loss on the road is small, and the cross-section of the wire can also be reduced, and the cost can be reduced. At the same time, the high voltage can increase the transmission distance, the voltage is low, the current is large, the voltage drop on the road is large, and the electric energy cannot be transmitted over a long distance.

According to the formula; P=ui, the higher the voltage, the smaller the current, the transmission line is resistive, the resistance value is unchanged, the larger the current, the greater the power loss of the line, so it is necessary to increase the transmission voltage and reduce the line loss.

It is mainly coal-fired power generation, and then the north power is transmitted to the south and the west to the east.

Electrical energy delivery refers to a way in which a power plant or power source is transported from one place to another. At present, China's power supply is still mainly based on coal power and hydropower, and is concentrated in the western and north-central regions, while China's main load centers are located in the eastern and southern regions, which constitutes the problem of uneven distribution of power supply and load in China, so large-capacity long-distance transmission is inevitable.

In the early days, transmission technology underwent the process of replacing DC transmission with AC transmission, which reduced the loss in power transmission, increased the speed and lengthened the transmission length. With the needs of science and technology and industrial production, it is believed that after the technology is mature, there will be more suitable electric energy transmission methods, such as new energy transmission methods: electric energy solid-state compression mode, solar energy separate collection, etc.

High-voltage transmission in order to reduce consumption and reduce costs.

The reason why high-voltage transmission is used is that in the case of the same transmission power, the higher the voltage, the smaller the current, so that the high-voltage transmission can reduce the current during transmission, thereby reducing the heat loss caused by the current and reducing the material cost of long-distance transmission.

Because the power loss on the transmission line is proportional to the square of the current (Joule's law q=i rt), it is necessary to use a large power transformer to increase the voltage to reduce the current and reduce the heat generation of the conductor in order to effectively reduce the loss of electric energy on the transmission line.

If the current in the line is reduced to the original 1 2, then the power loss in the line is reduced to (1 2) 2 = 1 4 of the long loss, so increasing the voltage can effectively reduce the power loss in the line.

According to the nature of the transmitted current, transmission is divided into AC transmission and DC transmission

In the 80s of the 19th century, direct current transmission was first successfully achieved. However, due to the difficulty of continuing to increase the voltage of Liwu DC transmission under the technical conditions at that time, the transmission capacity and efficiency were limited.

At the end of the 19th century, direct current transmission was gradually replaced by alternating current transmission. The success of AC transmission ushered in a new era of electrified society in the 20th century.

It is widely used in three-phase AC transmission, with a frequency of 50Hz (or 60Hz). Since the 60s of the 20th century, there has been a new development of DC transmission, which is combined with AC transmission to form an AC and DC hybrid power system.

The above content refers to Encyclopedia - Chain Guess - High Voltage Transmission.

Hello dear, high-voltage transmission is a kind of Fangshen calendar that transmits the voltage output from the generator through the transformer used in the power plant. The reason why this method of power transmission is adopted is because in the case of blind transmission power, the higher the voltage, the smaller the current, so that the high hood voltage transmission can reduce the current during transmission, thereby reducing the heat loss caused by the current and reducing the material cost of long-distance transmission.

The wire diameter is small, economical and low-cost, and it is most suitable for ultra-long-distance transportation, and the efficiency is also the best.

Under the condition that the transmission power is unchanged, the brighter and higher the voltage, the smaller the current in the line, and it can be seen from Joule's law that high-voltage transmission can reduce the loss of electric energy on the line.

Therefore, the answer is that the loss of power on the line can be reduced by the bridge