Inductor and resistor compound superconducting reactor

Abstract

The invention discloses an inductor and resistor compound superconducting reactor. The technical keys are that the superconducting reactor mainly comprises a superconducting inductive coil, a superconducting non-inductive coil, a low-temperature Dewar component, low-temperature insulating sleeves, superconducting binary current leads, superconducting transition leads and low-temperature refrigerant pipelines, wherein the superconducting inductive coil and the superconducting non-inductive coil are both completely soaked in low-temperature refrigerants inside the low-temperature Dewar component; the low-temperature insulating sleeves, the superconducting binary current leads and the low-temperature refrigerant pipelines are all connected with sealing cover plates of the low-temperature Dewar component; the superconducting inductive coil is connected in series with the superconducting non-inductive coil through the superconducting transition leads, and is connected with the superconducting binary current leads, so as to form the inductor and resistor compound superconducting reactor provided with a fixed inductance value and a variable resistance value. The superconducting reactor has the application characteristics of both the fixed inductance value of a single superconducting reactor and the variable resistance value of a single superconducting non-inductive coil, and can simultaneously have the current-limiting and power compensating function of an electric power system, as well as the high-efficient neutral point grounding function.

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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