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2G HTS Wire Applications
Clean Energy STI is leveraging its extensive IP portfolio and manufacturing expertise to develop 2G HTS wire for large, emerging markets
 
 
 


STI Energy Efficiency

SUPERCONDUCTING HIGH POWER TRANSMISSION CABLES
Superconducting High Power Transmission Power Cables are expected to transmit 5 to 10 times the electrical power of traditional copper or aluminum cables with much improved efficiency. High Temperature Superconducting (HTS) cables offer solutions for utilities facing challenges that include: substation footprint availability, lack of available rights of way, and high load connections between substations. They are particularly suited to high power load areas such as the dense urban business districts of large cities, where purchase of an easement and construction costs for traditional low capacity cables would be cost prohibitive. HTS cable system components include the cable that is comprised of 100s of strands of HTS wire and a cryogenic cooling system to maintain proper operating conditions.

SUPERCONDUCTING FAULT CURRENT LIMITERS (SFCL)
With power demand on the rise and new power generation sources being added, the grid has become overcrowded and vulnerable to catastrophic faults. Faults are abnormal flows of electrical current like a short circuit. As the grid is stressed, faults and power blackouts increase in frequency and severity. SFCLs act like powerful surge protectors, preventing harmful faults from taking down substation equipment, which can result in power loss to businesses and homes. Currently, utilities use massive circuit breakers, oversized transformers and fuses to prevent faults from damaging their equipment and protecting against surges. However, once a fault has occurred, standard circuit breakers suffer destructive failure and need to be replaced before service can be restored. Alternatively, SFCLs offer superior fault protection, operate at higher voltages, are invisible to the grid at zero-loss. They also increase reliability and survivability and provide immediate power recovery. Given these advantages, high voltage SFCLs are expected to be more cost effective than incumbent technologies.


Fault Current Limiters

SUPERCONDUCTING MOTORS AND GENERATORS

HTS wire enables electric motors and generators to operate at higher power densities. When stacked up against a comparable copper wire based electric machine, future superconducting motors and generators could potentially offer a 2-3x size reduction with higher efficiency. A potential sweet-spot for high-powered HTS generators could very well be large, megawatt class offshore wind turbines. Offshore superconducting wind turbines promise to capture clean energy at a lower cost than competing renewables, while delivering power directly to growing coastal cities. They play a unique role offshore where conventional technology cannot achieve the “power per tower” requirement to make economic sense. Although initial costs for large offshore turbines are more expensive, such as in foundations and mechanical structures, these costs are recouped by higher energy yields. The increase in power density provided by superconducting turbines significantly reduces generator weight and maximizes power per tower, turning wind power into an economically viable alternative.



Windmills - Superconducting Motors and Generators