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The United States will promote the application of superconducting cables in smart electricity

in the process of building smart electricity, the United States plans to use superconducting transmission technology rather than UHV transmission technology to connect the main electricity in the country beyond four time zones, especially when the experimental machine is equipped with multiple load sensors, displacement and deformation sensors to expand the range of experimental force, displacement and deformation, so as to improve the security of electricity and the ability of power allocation

since superconducting power transmission does not need high voltage, it can minimize transmission loss, electromagnetic pollution and the width of the occupied corridor, which truly represents the world's most advanced technological direction. The world's first high temperature superconducting (HTS) cable, jointly constructed by the Long Island Electric Power Authority of New York (LiPA) and American Superconductor Corporation, has been put into commercial operation on April 22, 2008. This superconducting power transmission system can meet the power needs of 300000 households when it operates at full load, and is only composed of three 138 kV cables. Compared with copper conductors of the same thickness, their transmission capacity is as high as 150 times. Although the oil cost of this project is expensive, the cost of the new superconducting cable will be reduced by four fifths, and the width of the transmission cable trench is only about one meter. Another advantage of this cable is that it can prevent fault current caused by electrical short circuit. Superconductors have a natural ability to limit current. Once the current increases to a certain extent, they will lose superconductivity and become as resistive as ordinary conductors, making the current decay. Therefore, the technology is also supported by the U.S. Department of homeland security

the core technologies of smart electricity are digital electricity, distributed energy system, information appliances and energy storage hybrid vehicles. The United States has made a lot of technical preparations here. According to the magazine "division of labor in wealth industry pays more attention to specialization and refinement", the government and industry research estimate that as the distribution system enters the era of computers, this product is the most ideal testing instrument for mechanical performance testing of metal materials. Modern digital electricity will reduce U.S. energy consumption by 10%, greenhouse gas emissions by 25%, and save $80billion in the cost of new power plants. According to an article in the New York Times, the research results of the Northwest Pacific National Laboratory of the U.S. Department of energy show that energy consumption can be reduced by 15% per year only by using digital tools to set household temperature and integrate price information. If the demand side monitoring system is popularized and used for 20 years, 70billion US dollars will be saved in the construction, maintenance, operation of power plants, substations and electricity, of which 40% of the cost will be saved in power generation, equivalent to 30 large-scale coal-fired power stations without investment

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