A Two-Branch Symmetrical Split Reactor

Abstract

The invention relates to a split reactor with two symmetric branches. A first branch of the split reactor is formed by sequentially connecting an upper external coil lead, an upper external coil, a first intermediate lead, a lower internal coil and a lower internal coil lead in series, a second branch of the split reactor is formed by sequentially connecting an upper internal coil lead, an upper internal coil, a second intermediate lead, a lower external coil and a lower external coil lead in series, and the first branch and the second branch of the split reactor are symmetric in structure; and when a circuit is connected, the upper external coil lead and the upper internal coil lead are connected, the lower external coil lead and the lower internal coil lead are respectively connected with different branches, or the lower external coil lead and the lower internal coil lead are respectively connected with different circuit components and are then are connected in parallel with the same circuit. The split reactor is high in coupling degree, the voltage is reduced during normal running, the reactance is large when a fault occurs, and an effect of effectively limiting a short-circuit current is achieved.

Description

technical field [0001] The invention relates to a split reactor, in particular to a split reactor with two symmetrical branches. Background technique [0002] Split reactors are generally hollow or inductive coils without magnetic materials, which are used to limit the short-circuit current when a short-circuit fault occurs in the power system circuit, and reduce the short-circuit current of the line to the breaking capacity of the circuit breaker. Compared with ordinary reactors, split reactors also have the advantages of small reactance and lower line voltage during normal operation. Therefore, it is widely used in power distribution system. [0003] Split reactors are also used in superconducting current limiters, and together with superconducting wires, they can limit the short-circuit current. At this time, it is also necessary to reduce the reactance in normal operation and increase the reactance in fault state, so the coupling degree between the two branches of the ...

AI Technical Summary

Problems solved by technology

When a short-circuit fault occurs in a branch connected to a coil and the current of the branch increases, the reactance of the branch increases due to the current imbalance of the two coils, limiting the increase of the short-circuit current

[0005] However, due to the distance between the upper coil 1 and the lower coil 2 of the two coils, the coupling between the coils is small, so that the coupling degree of the two coils is reduced, and the ability to reduce the voltage drop is limited.

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