Four-band shunt-wound high-temperature superconducting double-pie coil and winding die and winding method thereof

Abstract

The invention discloses a four-band shunt-wound high-temperature superconducting double-pie coil and a winding die and a winding method thereof. The four-band shunt-wound high-temperature superconducting double-pie coil consists two sets of coils and a pie-to-pie support gasket (5), wherein each set of coils comprises a positive pie and a negative pie which are wound by four shunt-wound superconducting bands (1-4); the high-temperature superconducting double-pie coil is divided into the positive pie and the negative pie by the pie-to-pie support gasket (5). Two transposition ports are formed in a position of 0 degree and a position of 180 degrees along the peripheral direction of the pie-to-pie support gasket (5); transposition is performed on the positive-pie coils and the negative-pie coils for two times at the two transposition ports. The winding die for the coil consists of a main shaft (6), a first template (7), a second template (8), a positioning bolt (9), a first pressing plate (10), a second pressing plate (11), a first locknut (12), a second locknut (13) and temporary separation blades (14). The outer side of the first template (6) and the outer side of the second template (7) are respectively provided with a small groove along the peripheral direction to clamp the pie-to-pie support gasket (5) in the middle; the first template (7) and the second template (8) are pressed by the first pressing plate (10) and the second pressing plate (11).

Description

technical field [0001] The invention relates to a double cake coil wound in parallel with high-temperature superconducting strips, a winding mold and a winding method thereof. Background technique [0002] High-temperature superconducting transformers and reactors used in AC power systems and smoothing reactors in DC power systems need to have the ability to withstand high voltage and high current. For high-temperature superconducting magnets that need to withstand large currents, since it is difficult to use multiple transposed wires connected in parallel to make spiral windings, a parallel structure composed of multiple double-cake coils is usually required. When applied to AC occasions, multiple windings are connected in parallel. Due to the different positions of the magnetic fields of each winding, there are differences in the self-inductance and mutual inductance between the windings, resulting in differences in the current distribution of each winding; at the same ti...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that the existing high-temperature superconducting double-cake coil can only be wound in parallel with one or two high-temperature superconducting strips, and the existing double-cake coil winding device cannot be directly applied to four or more parallel strips. In view of the disadvantages of winding coils with superconducting tapes, a double cake coil wound in parallel with four superconducting tapes and the corresponding winding mold and winding method are proposed.

The invention can be applied to winding double cake coils with four or more Bi-series and Y-series high-temperature superconducting strips, so as to effectively solve the problems caused by uneven current distribution of multiple series and parallel windings

Images