ac米兰中国官网1, 2011
Furukawa Electric has developed a 275kV ac米兰中国官网 of the highest voltage class in the world.
Utilizing the Yttrium-based superconducting wires, which boast excellent cost performance, the ac米兰中国官网 has doubled the voltage performance and tripled the power performance of conventional cables through improving the technologies for conversion to cable. It has also halved the AC loss of conventional cables, enabling massive amounts of electricity to be carried with low loss.
These results were achieved through the “Technology development project of the Yttrium-based ac米兰中国官网 device (Project leader: Yuh Shiohara, Director General of the International Superconductivity Technology Center)” commissioned by the New Energy and Industrial Technology Development Organization (NEDO).
Developmental Background
Photograph of ac米兰中国官网
As a ac米兰中国官网(Note 1)is capable of carrying massive amounts of electricity with low loss, ac米兰中国官网 expected to bring about a large-capacity yet compact cable that cannot be achieved using conventional technology, as well as making a significant contribution to energy savings and the reduction of CO2emissions. Particularly because the larger the transmission capacity, the greater the energy-saving effect, ac米兰中国官网 currently under development to become a backbone transmission line for carrying electricity from power plants to the point of consumption.
The most common backbone transmission line is 275kV in Japan, while it is 220kV overseas. However, the voltage class of ac米兰中国官网 power cables that had been developed so far was 66kV in Japan and a maximum of 138kV overseas, so it was imperative to develop a superconducting power cable that could withstand high voltages.
Furukawa Electric is undertaking the development of a 275kV ac米兰中国官网 system, with the aim of introducing it on a full-scale basis in 2020, through the “Technology development project of the Yttrium-based superconducting power device,” which was launched in FY2008. We have succeeded in raising the voltage of a ac米兰中国官网 and in developing a 275kV outdoor termination(Note 2), which were the important technical issues associated with the above project. We have also managed to halve the ac米兰中国官网 in order to reduce CO2emissions.
Features of the Developed Product and Data Specifications
- Development of the world’s largest capacity ac米兰中国官网
- The ac米兰中国官网 cable quadrupled the domestic development result of 66kV and doubled the international development result of 138kV.
- ac米兰中国官网 transmission capacity of 1.5 million kW (275kV 3,000A), which is three times greater than the conventional capacity, enabling the transmission of the power generated by one thermal power station with a single line of superconducting power cables.
- Achievement of the world’s smallest ac米兰中国官网(Note 3)
- ac米兰中国官网n AC loss of 0.12 W/m (50% of the previous world record of 0.23 W/m) in current loading of 3kA.
- The ac米兰中国官网 can reduce power transmission loss to 25% of that of conventional CV cables.
- Development of the world’s first ac米兰中国官网 outdoor termination
- Adopting a ac米兰中国官网 insulator(Note 4)with a number of advantages including light weight, anti-fouling performance, explosion resistance and workability in terms of assembly, this ac米兰中国官网 is lighter and more compact, with 20% less weight and 80% less length than the conventional ac米兰中国官网 utilizing porcelain shells.
- The termination ac米兰中国官网 superconducting cable have passed an AC voltage test of 400 kV and an impulse voltage test of 1155 kV, and have proven tolerance to constant AC current loading of 3 kA.
The result of this research will be presented at Jicable'11 - ac米兰中国官网(Note 5)to be held in Versailles, France from ac米兰中国官网0.
Glossary
(Note 1)ac米兰中国官网:
A ac米兰中国官网 uses high-temperature superconductive materials for its conductor carrying an electric current that reaches superconductivity at a liquid nitrogen temperature of minus 196°C, enabling the conduction of large electric currents on a small cross-sectional conductor with a low loss, to achieve a cable that is lightweight, compact and low loss compared with the power cables currently used. The structure of the superconductive power cable developed by Furukawa Electric is such that Yttrium-based superconductive tapes are spirally wound on a center core called a former, over which an electric insulation layer, superconductive shielding layer and protection layer are laid to constitute a cable core, and the cores as a whole are accommodated in a thermal insulation pipe.
(Note 2)ac米兰中国官网:
An outdoor termination is a terminal attached to the end of the ac米兰中国官网 to connect with electric facilities installed in an environment at room temperature. Under the ac米兰中国官网 system, it needs to have both the following functions: heat insulation for liquid nitrogen temperature and room temperature, and electric insulation for earth and high voltage.
(Note 3)ac米兰中国官网:
AC loss is generated when a ac米兰中国官网 carries AC current due to flux movement inside the superconducting wire. With an Yttrium-based ac米兰中国官网, the main cause of AC loss is a flux trap caused by a longitudinal magnetic field due to the gap between wires, so it is necessary to make the gap smaller and control the deterioration of the superconducting performance of the end of the wire. The AC loss was minimized in particular through controlling the deterioration of the superconducting performance of the end.
(Note 4)ac米兰中国官网 :
A ac米兰中国官网 is an FRP cylindrical core with excellent mechanical strength, where the aluminum fittings are strongly bonded to both ends of the cylindrical core and the exterior of the FRP core is coated with silicone rubber that has excellent electric insulation. A ac米兰中国官网 has a number of advantages including light weight, anti-fouling performance, explosion resistance and workability in terms of assembly compared with porcelain shells.
(Note 5)Jicable'11 - ac米兰中国官网:
Jicable'11 is an international forum for the exchange of research and development results relating to insulated power cables ac米兰中国官网ir accessories, from low voltage up to ultra-high voltage.
Reference
Outdoor termination for 275kV ac米兰中国官网
ac米兰中国官网 ends
