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High temperature superconducting cable obvious advantages in 2020 is expected to form an industry

Release time:

2013-08-20

With the increasing power load in large cities, high-voltage overhead lines want to go deep into the city load center is restricted by many factors, so it is necessary to use underground cables to transmit electric energy to the city load center. In this case, the advantages of using high-temperature superconducting transmission cables are highlighted. High temperature superconducting cable is the use of liquid nitrogen as a cooling medium, in the structure can also make the magnetic field concentrated in the cable, so as to prevent the pollution of the environment. At the same time, the liquid nitrogen-cooled high-temperature superconducting cable will not have the hidden danger of oil leakage pollution and fire.

According to foreign forecasts, high temperature superconducting cables are expected to form an industry in 2020. At present, large companies in industrialized countries such as the United States, Italy, Japan, South Korea, France, and Denmark are actively researching and developing. Someone has calculated that the global market for superconducting applications will reach $244 billion by 2020, with high-temperature superconducting cables accounting for about 5% of the total.

Because liquid nitrogen cooling can make high-temperature superconducting materials into the superconducting state, its price is close to the level of competition with ordinary cables, prompting high-temperature superconducting cables to speed up the practical process.

Assuming that the annual demand for XLPE insulated power cables of 10 kV and above in China is about 100000km, and 5% of the total amount is replaced by HTS cables, the total annual demand for HTS cables in China will reach 5000km.

High temperature superconducting cables have many advantages over ordinary cables. The transmission loss of high temperature superconducting cable is only 0.5 of the transmission power, which is much lower than the loss of 5% ~ 8% of conventional cable. In the case of the same weight and size, compared with conventional power cables, the capacity of HTS cables can be increased by 3 to 5 times, the loss can be reduced by 60%, and the floor space and space can be significantly saved. "Refitting the existing underground cable system with high-temperature superconducting cables can not only increase the transmission capacity by more than three times, but also reduce the total cost by 20%. The use of high-temperature superconducting cables can also change the traditional transmission mode and use low-voltage high-current transmission of electricity." A production of high temperature superconducting cable enterprise responsible person said.

China has made a major breakthrough in superconducting cable conductor technology. On August 16, under the on-site supervision of officials from the headquarters of the International Thermonuclear Experimental Reactor (ITER) program, the 765-meter CB superconducting cable conductor was rolled off the line at Baiyin Nonferrous Changtong Company. This conductor is the largest length superconducting cable running in the ITER device. The ITER device is a superconducting tokmak that produces large-scale nuclear fusion reactions. It aims to establish a sustainable clean energy system for mankind, commonly known as "artificial sun". In January 2003, China formally participated in the ITER program negotiations and became one of the cooperative members of the program. According to the agreement, China will undertake 70% of the production of pipe-mounted cable conductors.

Since the beginning of this year, the news of the successful development of superconducting cable projects in various countries and the realization of grid-connected demonstration operation has been one after another. The "superconducting transmission" that has been studied for more than 20 years has finally entered the practical stage, and commercial operation is expected to start within 5 years.

In April, the high temperature superconducting DC transmission cable with a length of 360 meters and a current carrying capacity of 10 kA developed by China passed the expert technical acceptance organized by the Ministry of science and technology, and was put into demonstration operation in Henan Province. This cable is currently the world's largest high-temperature superconducting cable, and it is also the world's first high-temperature superconducting DC cable to achieve grid-connected demonstration operation.

In July, the high temperature superconducting cable project of Tianjin Superconducting Technology Application Company of Fortis Group was officially launched. The project will build the first domestic second-generation yttrium-based high-temperature superconducting cable transmission demonstration line in Tianjin to accelerate the practical process of superconducting wires and superconducting cables.

In August, Japan Railway Comprehensive Research conducted a superconducting transmission test, and its superconducting cable developed to support DC transmission. At present, Tiezongyan has completed the performance test of 31 meters of cable, and the performance test of 310 meters of cable will be carried out in the next stage. Japan plans to gradually replace the aging metal cables with newly developed superconducting cables around 2020.

Some experts believe that challenges and opportunities coexist. my country's wire and cable industry should firmly seize this opportunity, integrate and reorganize, go deep into the high-tech cable industry of superconducting cables, win objective economic benefits, and revitalize my country's wire and cable industry. Eliminate vicious disorderly competition and welcome the arrival of truly brilliant prospects.

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