Laboratory and Field Tests of Movable Conduction-Cooled High-Temperature SMES for Power System Stability Enhancement

This paper introduces the first movable conduction-cooled high-temperature superconducting magnetic energy storage (SMES) system developed in China. The SMES is rated at 380 V/35 kJ/7 kW, consisting of the high-temperature magnet confined in a Dewar, the cryogenic unit, the converter, the monitoring and control unit, the container, etc. The proposed SMES can be loaded onto a truck to move to a desired location and put into operation with easy connection. Laboratory and field tests have been carried out to investigate the operational characteristics and to demonstrate the SMES effectiveness on improvements of system voltage stability and on the oscillation damping. Test results indicate that the SMES system has the features of fast response and four-quadrant power operation. The accessories for the movability of the SMES system are well designed. The system is feasible to be used in power systems.

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