Abstract
Power cables made of high temperature superconductors (HTS) are considered to be the most advanced application field of superconductivity in the electric power industry. Cables made of the first-generation (1G) HTS wires have already been put in use in electrical grids in a number of countries around the world. Active efforts are presently being taken to develop power cables made of second-generation HTS wires (2G or Coated Conductors). The basic principles for designing coaxial HTS power cables have been known since 1990s. New methods for developing compact 2G HTS AC power cables are considered. Methods to optimize the design of these cable aimed to ensure uniform distribution of the current among the cable layers and the technology for manufacturing such cables are presented. The test program and a setup for testing HTS cable models are described. Some problems pertinent to the development of small-diameter 2G HTS power cables are discussed. Examples of the development, manufacture, and test results of two basic designs of compact coaxial HTS cables, namely, a single-phase (a cable core and a shield) and a three-phase (so-called triaxial with three coaxial phases) versions, are given.
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