December 31, 2012, the value of the end of the year, beginning of the new year, China's independent innovation developed the world's first 220kV saturated core-type high-temperature superconducting current limiter, the State Grid Tianjin Shijiazhuang Substation formally linked to the network run. This world-class technological innovation, the subject is listed as the national "863 Program" project is based on the Tianjin Bailey electromechanical holding group led by Beijing Yunnabe Innoconductor Cable Co., Ltd., Tianjin Power Company cooperation research and Development. At present, this equipment grid load operation has been 6 months, after testing the performance indicators to achieve the desired results. For example, the internal pressure of high-voltage electrical insulating oil tank 50kPa seal test time is greater than 72 hours, fast response time of less than 8 milliseconds, excitation recovery time of less than 600 milliseconds, temperature power frequency withstand voltage, partial discharge, lightning impact, sound level and insulation resistance test Are in line with national standards, equipment operation in good condition. The Ministry of Science and Technology organized a group of experts to go to Shijiazhuang Substation in Tianjin to conduct on-site inspections and technical reviews on the "220kV / 800A Saturated Iron Core High-temperature Superconducting Current Limiter" and witnessed the compliance of the above performance indexes and unanimously passed Acceptance of this project. Industry experts said that the superconducting current limiter is the cutting-edge technology in the field of required components of the power grid, and many developed countries are stepping up research and development of such high-tech and products. However, the real top-notch Tianjin Trimble Electromechanical Holding Group and other tripartite cooperation developed by the tripartite 220kV / 800A core high-temperature superconducting current limiter, it is the world's practical application of the power system in the highest voltage level, the capacity Maximum, the fastest response time, the shortest excitation recovery time superconducting flow restrictor, reached the international advanced level. The success of this high-tech new product linked to the Internet is a sign that China has made major breakthroughs in this cutting-edge technology around the world. This has enabled China to maintain its leading position in the world in the development of superconducting restrictor technology, Industrialization has a very important significance. It is well known that electricity is the "blood" of modern society and that the safe operation of the power grid is related to the national economy and people's livelihood. I recall that a blackout occurred on September 8, 2011 in San Diego, U.S.A., disrupting nearly 7 million people for 13 hours of electricity supply, paralyzing the entire local community and causing huge economic losses. After analysis, The accident was caused by a fault in the transmission system. According to reports, the superconducting current limiter is an important technical measure to ensure the safety of transmission. It can be said that the power grid is safe because of it. In view of this, in order to advocate a scientific outlook on life, here we summarize and popularize the knowledge and related information of the superconducting flow restrictor, a high-tech new product. Development of Superconducting Current Limiter Talk about the current limiter and when talking about "electricity". With the rapid development of economy in our country, the demand for power and power quality is constantly increasing. The increasing scale of transmission and distribution network and interconnection between power grids inevitably lead to the rapid increase of power short-circuit power and fault short-circuit current. The rapid increase of fault short circuit current has become one of the technical bottlenecks restricting the development of modern power system. Because under normal circumstances, the power system short-circuit current can reach 20 times the rated current, and presents a number of site short-circuit current will exceed the limit breaking capacity of the circuit breaker so that the power system electrical equipment safety factor design value is greatly increased, thus greatly reducing Power system operation of the safety and economy. Therefore, how to effectively control the fault short-circuit current and reduce the breaking capacity of the circuit breaker is an important issue facing the current power system. At present, the means to suppress the short-circuit current of the power grid are very limited. High-impedance transformers and current-limiting hollow reactors are commonly used in the equipment. In the system design, it is common to reduce the size of the power grid or reduce the interconnection. High-impedance transformers can reduce the fault short-circuit current of the power grid to a certain extent, but at the same time increase the transmission loss of the power grid, which will cause a certain degree of adverse effects on the power quality. There are similar problems with using hollow reactors, and there are currently some technical difficulties with using current-limiting hollow reactors for high voltage levels. In the design to reduce the extent of grid interconnection or reduce the size of the grid and the power system to enhance grid interconnection and improve the transmission capacity of large power grid trend runs counter to. Affected by the global climate change, the deterioration of the ecological environment and the rapid consumption of fossil fuels, the energy structure of the world is undergoing major and profound changes. The smart grid is gradually being valued by all countries in the world. Smart Grid: Energy and Carbon Earnings Assessment released by North American National Laboratory (PNNL), a division of the US Department of Energy (DOE) ( According to the analysis conducted by the EPRI and related organizations, the smart grid will assume about half of the carbon emission reduction targets of the United States in 2020. On September 22, 2009, President Hu Jintao said at the United Nations Climate Change Summit that by 2020 China's non-fossil fuels will account for about 15% of primary energy consumption. On November 25, 2009, the State Council executive meeting decided that by 2020 China's carbon dioxide emissions per unit of GDP will drop by 40% -45% from 2005 levels. In March 2010, Premier Wen Jiabao made a "government work report" clearly "vigorously developing low-carbon technologies, promoting efficient energy-saving technologies, actively developing new and renewable energies, and strengthening the construction of smart grids." It can be seen that the smart grid has become a new trend and a new direction for the development of the world at present. In order to meet this new trend, China's power grid companies from China's vast geographical distribution of energy centers and load centers are not fully developed conditions of national conditions, in order to ensure the rapid development of China's economy in Europe and the United States based on the characteristics of smart grid, in particular, increased " Strong, "and build a strong smart grid featuring UHV backbone power grids characterized by informationization, digitization, automation and interaction. On the basis of this, taking into account the coordinated development of power grids at all levels, through the pilot and demonstration phase-by-step To the low-voltage distribution network and the client to start to promote the safety, efficiency and openness of the grid. From the perspective of strengthening the development strategy of strong elements, the traditional current-limiting components currently used in power grids in our country are no longer able to meet the needs of a strong smart grid. The development of superconducting technology and its application in power grids are increasingly valued by industry experts At present, in high temperature superconducting products, there are mainly superconducting cables, superconducting current limiters, superconducting transformers, superconducting energy storage devices, superconducting motors and the like used in power systems. Superconducting current limiters are all high temperature super Guide the most technologically mature products, the best prospects for the application, the most complete industrialization products, become the first choice for smart grid. Not only that, superconducting power technology is not only a civil technology, also has great application value in the national security, but also can be used to limit the short-circuit current of the ship power system. Superconducting current limiter function Superconducting current limiter research and application, marking the development of a national power industry. First, China's power grid capacity, and second, the voltage level is high, in order to ensure the stability of power grid operation This product is adopt screw conveyor is composed of a power transmission device, a screw shaft, an intermediate support seat, a universal joint, etc., and adopts double pitch blades to reduce the degree of compression of the material during transportation. It is equipped with high-quality medium-hanging bearings and is easy to install. 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