Research On Pulsed Power System Based On Superconductor Magnetics Energy Storage

With the development of technology, pulsed power technology has been widely used,such as electromagnetic railgun, high energy laser weapon, electromagnetic launch and so on. At the same time, The requirements of these applications for pulsed discharge systems are also improved. Superconducting magnetic energy storage system applied in pulsed power technology with high power density and high energy storage density has a unique advantage. In this paper, some key technologies of pulsed discharge system based on superconducting magnetic energy storage system are studied, including pulse shaped-circuit, the Optimization design of superconducting magnet and the Application and practicality of pulse discharge system.According to the requirement of actual pulse load, a type of pulse forming topology based on superconducting inductor energy storage is proposed in this paper, and the application circuit is designed. Five modes can be realized in the discharge circuit: charge, energy storage, discharge, termination discharge, and residual energy. Compared to the conventional pulse forming circuit, the new mode of termination discharge is of great significancefor some pulse load which need to end the discharging ahead of time. And the energy recovery mode can reduce the energy loss of the system. Then the simulation about the circuit combining with the electromagnetic railgun is completed, and the results of simulation show that the design of pulse forming circuit in this paper can be applied to the railgun. The termination discharge mode and the residual energy recovery mode have a positive effect on muzzle eliminating arc and reduce energy loss. In order to meet the technical requirements and practical requirements of large capacity pulse discharge system, the multi module parallel synchronous and asynchronous discharge mode has been proposed. In addition, because of the special nature of the superconductor and its high price, it is necessary to optimize the superconducting magnet of the intermediate energy storage device. The optimal design of the superconducting magnet with 10 kJ energy storage is carried out with Ansys finite element tool.Finally, the experimental platform of the pulsed power system based on SMES is built. The IGBT is used as the switching device of the pulse forming circuit, and DSP is used as the core of the system. Experiments have realized the design of the model, and the output of the pulse current is realized, the process of terminating the discharge is realized, and the energy loss rate of the system is reduced because of energy recovery mode.