Method for controlling charging and discharging currents of adjuster for superconducting magnet

Abstract

A control method for a superconducting magnet charging and discharging current regulator. The voltage unit (UV) adopts a full-bridge phase-shift control method, and adjusts the power of charging and discharging through the relative phase shift between the leading bridge arm and the lagging bridge arm; The auxiliary potential provided by the current unit (UI) through the voltage unit (UV), the switching tubes of the two bridge arms of the current source converter first give a trigger signal to the switching tube of the bridge arm to be turned on at the moment of commutation, and then control the voltage The switching tube of the unit (UV) voltage source converter makes it generate commutation voltage on the primary side of the transformer (T). On the contrary, the current flowing through the switch is reduced; since the commutation voltage is in the same direction as the current flowing through the switch to be turned on, the current flowing through the switch is increased until the current flowing through the switch to be turned off is reduced to zero, Then turn off the switch tube. The invention can reduce the loss of the switch tube and improve the stability of the system.

Description

Technical field: [0001] The invention relates to a control method for a superconducting magnet charging and discharging current regulator, in particular to an auxiliary potential phase-shifting control method for the current regulator. Background technique: [0002] The characteristics of zero resistance and high current-carrying capacity under a strong magnetic field make superconducting magnets widely used, especially large magnets used to generate strong magnetic fields in high-energy physics experiments. Superconducting magnets have almost replaced all conventional magnets with large volume and high power consumption; at the same time, with the development of superconducting power technology, especially micro-superconducting energy storage, it has been commercialized abroad and is widely used to improve power quality and increase Power system stability, etc., these have made superconducting magnets have been used in unprecedented applications. [0003] The general opera...

AI Technical Summary

Problems solved by technology

Due to the large current passing through the superconducting magnet, it can be seen from the above switching action that the switching tube of the current source converter always needs to be turned on and off to realize charging and discharging when the current is large. , this way of charging and discharging not only makes the switching tube on the secondary side bear a large switching loss, but also easily damages the switching tube

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