Quenching recovery test system for resistance-type superconducting current limiter

Abstract

The invention provides a quenching recovery test system for a resistance-type superconducting current limiter, which comprises a to-be-superconducting current limiter non-inductive coil unit, two circuit breakers, four relays, a controller, a constant current source, a non-inductive resistor and a data acquisition card with multiple channels, two ends of the superconducting current limiter non-inductive coil unit are respectively connected with each circuit breaker. A data acquisition card channel 1 is connected in parallel to two ends of the superconducting current limiter non-inductive coilunit through two relays which are connected in series. Two ends of a branch formed by connecting the constant current source and the non-inductive resistor in series are respectively connected to twoends of the non-inductive coil unit of the superconducting current limiter in parallel through another two relays, and a data acquisition card channel 2 is connected to two ends of the non-inductive resistor in parallel; and the controller detects that each circuit breaker sends out a high-level pulse signal at the same time, then controls each relay to be completely closed, and controls the controller and each relay to be completely reset within a set time. According to the invention, the rapid and accurate test of the quench recovery time of the resistance-type superconducting current limiter can be realized under an alternating-current high-voltage condition.

Description

technical field [0001] The invention relates to the field of a resistance type superconducting current limiter and a superconducting magnet, in particular to a quench recovery test system for a resistance type superconducting current limiter. Background technique [0002] Quench and quench propagation: A superconducting magnet is a magnetic field generating device wound with a superconducting wire strip. Under the action of mechanical vibration, thermal load, current, external magnetic field and other conditions, an overheated area will appear inside the superconducting magnet, that is, No longer exhibit superconducting properties, this phenomenon is called quenching. When the local input energy exceeds a certain threshold, the normal region will experience instability expansion, resulting in a large amount of loss in the superconducting magnet. This phenomenon is called quench propagation. [0003] The application of superconducting technology in power grid is an important...

AI Technical Summary

Problems solved by technology

[0008] (1) Under high voltage conditions, the current source and acquisition card connected to the system may be at risk of being broken down by high voltage; under strong electromagnetic interference, the data acquisition card is greatly disturbed, and the specific voltage value cannot be accurately measured

This makes in-line measurements under high pressure impossible

[0009] (2) During the measurement of the quench recovery process, the recovery time of the superconducting current limiter is very short, and conventional methods make it difficult to measure and observe the recovery process

However, the working conditions of the measurement system are limited, the withstand voltage is low, the system is relatively simple, and online detection cannot be realized

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