MAIN INSULATION STRUCTURE OF 22.9KV LEVEL HIGH TEMPERATURE SUPERCONDUCTIVE TRANSFORMER HAVING DOUBLE PANCAKE COIL

摘要

PURPOSE: A main insulation structure is provided to achieve improved efficiency of insulation of superconductive transformer by using a superconductor having a resistance of zero. CONSTITUTION: A main insulation structure comprises a low temperature vessel(5) which is fitted around an iron core(4); and a unit winding portion(6) having a three-stage structure of a high voltage winding, a low voltage winding, and a high voltage winding, wherein the unit winding portion is repeated arranged in the vicinity of the low temperature vessel. Each individual winding(7) of the unit winding portion has upper and lower plates(9a,9b) which are fixed to a cylindrical bobbin(8) through a bolt(10). Insulating conductors(12) are wound between the upper and lower plates, with spacers(11) arranged between the insulating conductors.