Abstract of Thesis presented at COPPE/UFRJ as a partial fulfillment of the requirements for the degree of Master of Science (M.Sc.)

Thermal-electromagnetic Simulation of a Superconductor Tube for a Fault Current Limiter

Eduardo Souza Motta

March/2007

Advisors:

Rubens de Andrade Junior Richard Magdalena Stephan

Department:

Eletrical Engineering

      With the growing of the power systems, i.e., the introduction of new energy sources, and the interconnection of the power systems, the short circuit levels increase. Fault current limiters (FCL) are the technical solution of this problem. Among different types of FCL's, one of the most promissing is the resistive superconductor FCL.
      This work has the objective to deduce analytically and numerically the shapes of current density, magnetic field and electric field (and consequently the loss) of a resistive superconductor limiter transporting a sinusoidal current. The influence of the variation of the system temperature in the electromagnetic behavior of the superconductor was analyzed.