Mobile directly-cooled high temperature superconducting magnetic energy storage device

Abstract

The invention discloses a mobile high temperature superconducting magnetic energy storage device, which comprises a monitoring subsystem, a power adjusting subsystem, a superconducting magnet and a low temperature subsystem which are integrated in a mobile box body, wherein the monitoring subsystem is used for acquiring and recording real-time states of a power system and the high temperature superconducting magnetic energy storage device and sending a control instruction to the power adjusting subsystem; the alternating current side of the power adjusting subsystem is connected with the power system, and the power adjusting subsystem implements power exchange between the superconducting magnet and the power system according to the instruction sent by the monitoring subsystem; the superconducting magnet is sealed in a Dewar, and two ends of the magnet are connected with the direct current side of a current transformer of the power adjusting subsystem through current leads; and the lowtemperature subsystem is connected with the Dewar and used for vacuumizing the Dewar so that the magnet is kept cool in a working temperature area. Transient stability of the power system is improvedby compensating the power unbalance of the power system in real time, meanwhile, the device has mobility, and an installation site can be flexibly selected.

Description

technical field [0001] The invention belongs to the field of energy storage devices, and in particular relates to a high-temperature superconducting magnetic energy storage device, which is used to improve the transient stability of a power system. Background technique [0002] The principle of Superconducting Magnetic Energy Storage (SMES) is to cool the superconducting coils sealed in the Dewar to a superconducting state through a low-temperature subsystem, using the high-efficiency energy storage characteristics of superconducting coils and the rapid development of modern power electronic devices. The energy conversion characteristics of the system, and the dynamic active and reactive power exchange with the connected power system, achieve the purpose of improving the stability of the power system. [0003] SMES is mainly divided into high temperature superconducting magnetic energy storage (High Temperature SMES, HT-SMES) and low temperature superconducting magnetic ener...

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Problems solved by technology

At present, two direct cooling HTc-SMES have been successfully developed and reported in the world, both of which are developed in Japan, with energy storage capacities of 4kJ and 50kJ respectively. They are both fixed installation methods, and the installation location cannot be flexibly selected in the actual system.

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