For a long time, China's cable industry has been in a state of vicious competition, accompanied by other "sequelae", such as low-price bidding, overcapacity and low-end market competition... These have become the focus of attention in the industry, but all the while No effective improvement has been made. At present, with all-round construction of various industries in China, the demand for special cables in the high-end areas of various industries is huge, providing space for China's cable companies to take off, and it also provides an excellent opportunity to surpass competitors. People in the industry are aware that although China is currently the largest producer of wire and cable in the world, nearly 10,000 cable companies are large and small, but more than 90% of the enterprises are small and medium sized enterprises. Product homogeneity and repeated construction are serious. Products are almost It is a low-end cable, so there are few manufacturers that can produce special cables such as fire-proof cables, rolling stock cables, nuclear power plant cables, and heating cables. The total number of wire and cable manufacturers is less than 1%, resulting in the supply of special cables. Insufficient, most of them continue to rely on imports. The above phenomenon reflects that although China’s cable industry has a large output, and although there are many enterprises, the technology still lags far behind developed countries. In recent years, with the development of China's land, sea, and air, no matter whether it is aerospace or shipbuilding, transportation, electricity, or mineral development, there are a large number of special cables in various forms. Under such circumstances, if China’s cable industry fails to realize The seriousness of the problem, without structural adjustment, will make it difficult to adapt to the pace of the times. At present, according to rough statistics, the sales of special cable products in China each year is about 40 billion yuan, accounting for about 30% of the total domestic cable market sales, of which high-temperature cable demand is strong. High-temperature cables, as an important part of special cables, have a strong “vitality†and the current market is showing a trend of oversupply. On the basis of high-temperature cables, the relevant national plans also set up support for major projects of "high-temperature superconducting transmission." Despite strong support from the government, China's high-temperature cable development technology is far from meeting the needs of the new market. China imports about two billion yuan from abroad for domestic construction each year. At the same time, it is estimated that by 2020, the total market for global superconducting applications will reach 244 billion U.S. dollars, and high-temperature superconducting cables will account for about 5% of the total. Superconducting cables are also fruitful and basically meet market demands. Especially since this year, the successful development of superconducting cable projects in various countries and the realization of grid-connected demonstrations have been one of the most exciting news. The "superconducting power transmission" that has been studied for more than 20 years has finally entered the practical stage, and it is expected that the commercial operation will start within 5 years. In April, China's high-temperature superconducting DC transmission cable with a length of 360 meters and a current carrying capacity of 10 thousand amps was approved by expert technology organized by the Ministry of Science and Technology and was put into 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 that can achieve grid-connected demonstration operation. In July, Fortis Group’s Tianjin Superconducting Technology Application Company’s high-temperature superconducting cable project was officially launched. The project will build the first domestic second-generation lanthanide high-temperature superconducting cable transmission demonstration line in Tianjin to accelerate the practical development of superconducting wire and superconducting cables. In August, Nippon Rail Research conducted a superconducting transmission test, and the superconducting cable it developed supports DC transmission. At present, Iron Institute has completed the performance test of the 31-meter cable, and the next stage will perform the performance test of the 310-meter cable. Japan plans to gradually replace the aging metal cables with newly developed superconducting cables around 2020. The development of superconducting cables can be a huge impact on ordinary cable products. Superconducting technology can make high-temperature superconducting materials into superconducting state due to liquid nitrogen cooling. The price is close to that of ordinary cables, and the price advantage A major factor directly promotes the high-temperature superconducting cable to accelerate the practical process. In terms of performance, high-temperature superconducting cables also have many advantages over ordinary cables. The transmission loss of high-temperature superconducting cables is only 0.5% of the transmission power, which is much lower than the loss of 5%-8% of conventional cables. With the same weight and size, compared with conventional power cables, the capacity of high-temperature superconducting cables can be increased by 3-5 times, loss by 60%, and space and space can be significantly saved. The use of high-temperature superconducting cables to retrofit existing underground cable systems will not only increase the transmission capacity by more than three times, but also reduce the total cost by 20%. In addition, according to professionals, the use of high-temperature superconducting cable can also be used to change the traditional transmission methods by using low voltage and high current transmission of electrical energy. In addition, in recent years, the United States, Japan, South Korea and Europe have successively developed second-generation high-temperature superconducting tapes with a length of more than 1,000 kilometers and a transmission width of more than 200 amps per cm width. Some companies in developed countries have already implemented second generation With the production of high-temperature superconducting tapes in the market, power demonstration projects such as superconducting cables and superconducting current limiters have continued to increase. According to the analysis, although China’s R&D and application of superconducting power lag behind those of the United States, if we seize the opportunity to develop vigorously, it is expected that by 2025 China’s superconducting power is expected to reach US$913 billion, of which superconducting cables will account for about 55%. That is 502 billion US dollars, accounting for 2.75% of the national GDP. At present, in the context of China, during the “12th Five-Year Plan†national power grid construction, high-temperature superconducting power transmission has a series of advantages in the development of high-voltage and large-capacity power transmission, and it is a revolutionary frontier technology. At present, the world’s first high-temperature superconducting cable with the largest transmission current—current carrying capacity of 10 kA—has been successfully developed in China. This is also the world’s first high-temperature superconducting DC cable that realizes grid-connected demonstration operation, marking China’s New breakthroughs have been made in the development of large-capacity superconducting cables, and they have taken a leading position internationally. This move has aroused great attention from academics in the academic world. At the same time, the expert advisory group headed by Academician Yan Luguang of the Chinese Academy of Sciences and Academician Gu Guoxuan of the Chinese Academy of Engineering believes that the biggest characteristic of superconducting transmission is its large transmission capacity, low loss, high current density, and small size. This high-temperature superconducting cable will be used in China. The development of superconducting cable technology in the world has greatly promoted the development. According to relevant experts' forecasts, in addition to the future development trend of high-temperature superconducting cables, there are still many areas where the demand for special cables will be greatly increased. For example, the average annual demand for locomotive cables will reach 160,000-200,000 kilometers; communications and signals The demand for cables will also reach 70,000-100,000 kilometers. In addition, the implementation of urban rail transit construction has also won a huge market for China's wire and cable industry. It is predicted that the annual demand for vehicle cables will be around 30,000 kilometers, while the annual demand for general-purpose signal cables for traffic is around 20,000 kilometers... Against this backdrop, it is not difficult to see that China's wire and cable industry faces both challenges and opportunities. Cable companies only firmly grasp this opportunity, review the situation, rule out malignant and disorderly competition, increase mergers and acquisitions, increase technology research and development, and deepen high-temperature super Leading cable high-tech cable industry can obtain considerable economic benefits, while raising China's level in the field of high-temperature superconducting technology and revitalizing China's cable industry.
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