Inductance and resistance composite superconducting reactor

Abstract

The invention discloses an inductance and resistance composite superconducting reactor, the technical points of which are as follows: mainly including a superconducting inductance coil, a superconducting non-inductive coil, a low-temperature Dewar component, a low-temperature insulating bushing, and a superconducting binary current lead , superconducting transition wires and low-temperature refrigerant pipes; superconducting inductive coils and superconducting non-inductive coils are completely immersed in low-temperature refrigerants in low-temperature Dewar components; low-temperature insulating sleeves, superconducting binary current leads and low-temperature refrigeration The agent pipelines are all connected to the sealing cover of the low-temperature Dewar part; the superconducting inductance coil is connected in series with the superconducting non-inductive coil through the superconducting transition wire, and then connected to the superconducting binary current lead, thus forming a fixed inductance value and The inductance and resistance compound superconducting reactor with variable resistance value takes into account the application characteristics of the fixed inductance value of a single superconducting reactor and the variable resistance value of a single superconducting non-inductive coil, and can have both Power system current limiting and power compensation functions, and high-efficiency neutral point grounding functions.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a reactor used for current limiting, power compensation and neutral point grounding of the power system. Background technique [0002] Reactors with power system power compensation or current limiting functions are widely used in power transmission and distribution systems and power device systems. In particular, the introduction of superconducting materials with very high allowable operating current density and approximately zero resistivity makes superconducting reactors wound from superconducting wires have technical advantages that conventional copper or aluminum reactors cannot achieve. , such as large operating current, low operating loss, small size, light weight, etc. [0003] At present, superconducting reactors with reactive power compensation or short-circuit fault current limiting functions applied in high-voltage AC transmission systems, and superconducting reactors wit...

AI Technical Summary

Problems solved by technology

However, there is still no superconducting reactor with both power system compensation and current limiting functions, especially no practical technical solutions involving inductance and resistance composite superconducting reactors.

In addition, the superconducting non-inductive coil device with variable resistance developed by using the quench characteristics of superconducting wires has also been practically applied in the current limiting of short-circuit faults in power systems, but the superconducting non-inductive coil device does not have the power system compensation function

As for the current transformer neutral point grounding reactor, due to the existence of traditional wire resistance, it is impossible to solve the contradiction between effective grounding and meeting the current-limiting high-impedance requirements

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