What Is Power Delivery?

Electricity transmission refers to a method of transmitting electricity from a power plant or power source from one place to another. Due to the immaturity of early technology, most of the electricity transmission uses direct current transmission, and later it gradually evolves into AC transmission. AC transmission has many advantages and reduces electricity. Loss during transportation increases speed and length. However, there is still a certain amount of loss. It is believed that in the future, when the technology is mature, more suitable power transmission methods will appear. For example: solid-state compression of electrical energy, separate collection of solar energy, etc.

Power transmission

Regarding the transmission method of electric energy, whether to use direct current transmission or alternating current transmission has caused great controversy in history. American inventor Edison and British physicist Kelvin strongly advocated the use of direct current transmission, while American inventor Westinghouse and British physicist Ferranti advocated the use of alternating current transmission.

In the early days, engineers were mainly working on direct current, and the power supply range of power stations was limited, and it was mainly used for lighting and not yet used as industrial power. For example, Edison Electric Lighting Company (founded in 1878) established the first power station in London in 1882 and installed three 110-volt "Juhan" DC generators. This was developed by Edison in 1880. The generator can power 1500 16-watt incandescent lamps.

However, with the development of science and technology and industrial production, power technology has gradually been widely used in communications, transportation, power and other aspects, and society's demand for power has also increased dramatically. Because the user's voltage cannot be too high, to transmit a certain amount of power, it is necessary to increase the current (P = IU). The larger the current, the more heating the transmission line will be, and the more power will be lost; and the larger the current, the larger the voltage lost on the transmission line, and the lower the voltage users get. The lower the voltage. The disadvantages of DC power transmission have limited the application of power and prompted people to discuss the issue of AC power transmission. Although Edison was a great inventor, he had no formal education, lacked theoretical knowledge, and was difficult to solve.

However, in order to reduce the loss of electrical energy in the transmission line, the voltage can only be increased. Increase the voltage at the power station, and then reduce the voltage to the user area, so that the purpose of long-distance power transmission can be achieved with low loss. To change the voltage, only AC transmission can be used. In 1888, a large AC power station on the Thames in London, designed by Ferranti, began to transmit electricity. He used a steel-copper copper core cable to send 10,000 volts of AC power to urban areas 10 kilometers away.

With the development of science, in order to solve the problems of AC power transmission and seek more reasonable transmission methods, people have now begun to use DC ultra-high voltage power transmission. But this is not simply a return to the DC transmission of the Edison era. The electricity generated by the power station and the electricity used by users is still AC, but in long-distance transmission, inverter equipment is used to change the AC high voltage to DC high voltage. In this way, the three wires used for AC power transmission can be reduced to two, which greatly saves the power transmission wires. At present, the longest overhead DC transmission line is the line between Mozambique's Kabulabasa Hydropower Station and Azania, with a length of 1414 kilometers, a transmission voltage of 500,000 volts and a capacity of 2.2 million kilowatts.

New energy transmission method

The AC transmission mode has been developed for hundreds of years. In order to modernize construction and energy conservation, the power laboratory is studying more efficient and convenient transmission modes, such as: spanning transmission and radial transmission, both using relay station mode and point-to-point transmission. The use of space transmission does not need to go through traditional transmission media, but uses span and radioactive transmission, which exceeds the traditional contact but minimizes transmission loss!

However, the above-mentioned need to build many base stations is also a resource investment. Therefore, more new types of solid-state power supply and solar energy are developing rapidly. In 10 years, the recycling of exhausted solid batteries to regenerate second-generation batteries. Relatively speaking, solar energy has more efficient and convenient applications. In 2015, solar cells will realize the third-generation technology, which will greatly improve the lighting and area than today! Not only does the installation of centralized lighting panels in the user's home, but also no need for transmission