Things to note when laying cables in winter
Date:2016-01-20 16:14:00
High-temperature superconducting technology has the advantages of relatively low price, large capacity, low loss, and no electromagnetic pollution. It has attracted considerable attention internationally, and many countries have developed beyond Leading industries have risen to strategic heights. my country has made major breakthroughs in high-temperature superconducting technology. In August 2013, under the on-site supervision of officials from the International Thermonuclear Experimental Reactor (ITER) program headquarters, the longest superconducting cable running in the ITER device - a 765-meter CB (factory standard) superconducting cable conductor Offline at Baiyin Nonferrous Changtong Company. In addition, relevant national plans also support major "high-temperature superconducting power transmission" projects. At present, my country imports about 2 billion yuan of high-temperature cables from abroad for domestic construction every year. It is expected that the global superconducting application market will reach 244 billion US dollars (approximately 1,486.9 billion yuan) by 2020, and high-temperature superconducting cables will account for about 5% of the market. share. Therefore, the research and development and application of high-temperature superconducting technology will be an important technology in the wire and cable industry in the future.
Carbon fiber cables have also become famous in recent years. As an alternative to traditional steel-core aluminum stranded wires (bare conductors), carbon fiber cables are mainly used in 110kv-220kv lines. Compared with conventional steel-cored aluminum conductors (ACSR), the aluminum cross-sectional area of ACCC is increased by 29%, and the weight per unit length is 20% lighter. Therefore, under the condition that the allowable drape is certain, the use of ACCC can greatly improve the line transmission capacity and reduce the loss. By replacing a large number of ordinary conductors with ACCC conductors, the power grid company can expand the capacity of the power grid without adding new lines, significantly saving land, towers, and engineering costs, which is in line with the policy direction of energy conservation and efficiency improvement. Carbon fiber composite conductors will be a revolutionary alternative to existing conductors, providing new development opportunities for companies with strong competitive advantages in the field of carbon fiber composite conductors.
Although China's cable downstream market is still in a situation where high-end cables need to be imported, it is foreseeable that with the continuous advancement of these six major cable technologies, soon can solve this problem.
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