The first domestic high-temperature superconducting low-voltage DC cable was put into operation in the Soviet Union.
2023-11-23
Recently, China's first high-temperature superconducting low-voltage DC cable was put into operation in Suzhou, filling the gap in the application of superconducting cable low-voltage DC system in China.
Recently, China's first high-temperature superconducting low-voltage DC cable was put into operation in Suzhou, filling the gap in the application of superconducting cable low-voltage DC system in China.
Dong Xiaofeng, a senior engineer in the equipment management department of the State Grid Suzhou Power Supply Company, said that the diameter of the superconducting cable is 165mm, and its transmission capacity is equivalent to 20 traditional cables, but its volume is only about one tenth of that of traditional cables.
High temperature superconducting low voltage DC cable has the characteristics of small size, large capacity, light weight and low loss, which can better save the resources of underground pipe gallery and improve the power transmission efficiency. In June 2020, Wujiang District Government, State Grid Suzhou Power Supply Company, Jiangsu Etern Co., Ltd. The three parties jointly launched the construction of high temperature superconducting DC cable demonstration project. On the basis of Wujiang Tongli medium and low voltage DC distribution network, a high temperature superconducting DC cable with a total length of 180 meters will be built to connect the 10 kV Pangdong DC central station.
Dong Xiaofeng, a senior engineer in the equipment management department of the State Grid Suzhou Power Supply Company, said that as an economically developed city, Suzhou has a very strong demand for load growth, and the access to new energy is also relatively dense. In this development situation, the company first thought of superconductivity. Technology.
The second-generation high-temperature superconducting tapes used in this project are Jiangsu Etern Co., Ltd. Self-design and production, to achieve the localization of the core materials of the superconducting cable system.
"In its working environment, its resistance is 0, that is to say, when it transmits power, there is almost no line loss. Therefore, in terms of energy saving, the advantage of high temperature superconducting DC cable is very obvious." Jiangsu Etern Co., Ltd. Bao Ying, head of the superconducting project, said that in addition, its transmission capacity is extremely large, almost equivalent to two orders of magnitude of the copper material used in traditional cables, that is, when 1 mm² copper transmits several amperes of current, the superconducting material can 1 mm² be transmitted to several hundred amperes.
In recent years, with a large number of new energy sources such as wind power and photovoltaic connected to the grid, and the rapid development of DC load represented by electric vehicles, DC power grid has become a new research direction. Compared with AC superconducting cables, the line loss of the power grid is reduced by about 70%. The application of DC superconducting transmission technology injects strong power into the construction of new power systems and energy transformation and upgrading.
Cai Fengqin, chairman of the company, said that when AC was used, the monthly electricity consumption was 1.3 million degrees. Since the DC transformation, the company can probably save 2% yuan and reduce the cost by 30,000 yuan per month..
Source: Published in Suzhou
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