Saturated iron core type superconducting current limiter with direct current control system and method for controlling same

• Main Authors: HU XIAOMING, CAO ZHENGJIAN, XIN YING, WU AIGUO, GONG WEIZHI, HE YI
• Format: Patent
• Language: Chinese; English
• Published: 21.09.2011
• Subjects: BASIC ELECTRIC ELEMENTS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

The invention relates to a saturated iron core type superconducting current limiter with a direct current control system, which comprises a superconducting magnet, a reactance system, namely an iron core and an alternating current winding, a refrigeration system and a monitoring system and also comprises a direct current control system which is connected with two ends of the superconductingmagnet and connected with the monitoring system by a data wire; the direct current control system comprises a direct current power module, a magnetic energy absorption module and a control module. The invention also provides a method for controlling the current limiter; when an electric net has normal operation, the control module of the direct current control system automatically adjusts the size of the direct current excitation current in the superconducting magnet according to the size of load in the electric net; when the electric net has short-circuit fault, the control module actively cuts off a direct current loop, s