Nanocomposite Insulation for 2G Superducting Wires

The U.S. Department of Energy, in collaboration with several industry participants, is developing power-distribution systems based on second generation high-temperature superconducting (HTS) wires and cables. U.S. industry has made considerable improvements in the electrical performance and large-scale production of these wires, and several HTS components have already been integrated into the United States¿ power grid. As these rapid developments in superconducting cable technology continues, a critical need has emerged for reliable, high-voltage dielectrics for use in these systems. High-voltage dielectric materials for HTS power applications must be capable of long-term, high-voltage, cryogenic-temperature operation. This project will develop nanocomposite-based dielectric materials and validate their performance under simulated operating conditions. The Phase I work involved the development and testing of high-voltage dielectric materials based on nanocomposite technology. The Phase II project will continue the development of the high-voltage dielectric materials and evaluate their performance relative to the requirements of HTS power systems. Commercial Applications and other Benefits as described by the awardee: Reliable, high-performance dielectric materials are needed for use in future HTS power distribution systems, in cable systems, fault current limiters, transformers, and in generators based on HTS technology. Advancements in cryogenic dielectrics would also benefit superconducting magnet systems under development by DOE, as well as space-based electronic systems that operate at low temperatures