Spacing layer of high-temperature super-conductivity non-inductive coil

Abstract

A spacing layer of a high-temperature super-conductivity non-inductive coil is disposed between turns of a double-winding non-inductive pie coil and is band-shaped, namely in the spaces between two parallelly-wound bands and adjacent bands. The spacing layer of the high-temperature super-conductivity non-inductive coil is characterized in that the width w of the spacing layer (1) is 1-2mm larger than that of a high-temperature super-conductivity band (3), a rectangular cooling passage (2) with leftward and rightward openings is arranged on the spacing layer (10, the supporting width k of the spacing layer deducting the width of the cooling passage (2) is one third of the width w of the spacing layer (1), the width l of the cooling passage (2) ranges from 5mm to 6mm, the length h of the cooling passage (2) is two seconds of the width w of the spacing layer (1), and the thickness t of the spacing layer (1) meets the following formula: t=2+2.8 LX10-3, wherein the L is the length of an 'S'-shaped or 'U'-shaped double-winding high-temperature super-conductivity band.

Description

technical field [0001] The invention relates to a high-temperature superconducting non-inductive coil for a resistance-type fault current limiter, in particular to an interval layer of a high-temperature superconducting cake-type non-inductive coil. Background technique [0002] At present, in order to adapt to the rapid development of the national economy, the continuous increase of the scale of the power grid and the continuous improvement of the degree of interconnection, my country's power grid is developing in the direction of ultra-large scale. However, the stability problem of my country's power grid has become increasingly serious, and the security and reliability of the power grid are under enormous pressure. Short-circuit faults are one of the serious faults that endanger the safety of power systems and cause huge economic losses. The resistance-type high-temperature superconducting current limiter based on the second-generation high-temperature superconducting tap...

AI Technical Summary

Problems solved by technology

Since the second-generation high-temperature superconducting tape is a ceramic coating material, it has inevitable defects such as brittleness and fragility, and is easily damaged during the coil manufacturing and use process, resulting in degradation of superconducting properties.

The "wave crest" of the corrugated strip-shaped spacer layer is in linear contact with the high-temperature superconducting strip, and the prestress during the coil winding process will cause the superconducting strip and the linear contact to be locally bent and damaged; During the precooling process of the current coil from room temperature to liquid nitrogen temperature, the thermal shrinkage stress will also cause the superconducting tape to be partially bent and damaged by the force at the contact with the line; The instantaneous electromagnetic effect will also cause the superconducting tape and the linear contact to be bent and damaged by local force

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