The first domestic superconducting power transmission experiment in Japan started in Yokohama this week. This experiment uses a superconducting transmission line as a relay to deliver electricity to ordinary households. It is estimated that the power loss of the unit line length of this type of transmission is about half that of the conventional method.
According to the report of the Asahi Shimbun of Japan, this one-year experiment was carried out by the New Energy and Industrial Technology Development Agency and Tokyo Electric Power Co., Ltd., and the electricity delivered can be used by about 50,000 households.
The wires of the transmission line in this experiment were made of materials such as ruthenium-based alloys. The three wires were bundled and surrounded by liquid nitrogen. The liquid nitrogen was circulated and cooled, and the wires could be cooled down to about minus 200 degrees Celsius to create superconducting power transmission. Low temperature environment.
This superconducting cable is not used throughout the transmission but only as a transit. It is actually a section of a line of about 240 meters in Yokohama Asahi transformer station in Yokohama City. It has been estimated that, including the power needed to cool the wires, the power loss of the unit line length used in the experimental transmission is about half that of traditional transmission methods.
According to reports, the purpose of this experiment is to examine problems that may be encountered in the practical application of superconducting transmission-related products and technologies, and strive to establish a sound superconducting transmission technology to ordinary households before 2020 and enter the stage of practical application.
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