| In recent years, the superconducting technology is popular in people’s production and life. An increasing number of researchers and institutions participate in study of the superconducting magnetic energy storage(SMES) system. The application prospect of SMES is very extensive. SMES can enhance the stability of power system when it is used in power supply system. It also can improve the power output characteristics when it is used in decentralized power systems; Furthermore, it can be used as the energy storage component in some pulsed-power devices. With the increasing number of SMES, its electromagnetic radiation problem becomes more and more serious. The leakage magnetic field of traditional SMES is more serious, which limited the application in engineering. So it is necessary to research the shielding of leakage magnetic fields in SMES.Firstly, the principle of high-temperature SMES magnet’s electromagnetic field is introduced. The superconducting tapes, the particle swarm optimization and the finite element analysis software ANSYS are also introduced.Secondly, by taking the 1MJ SMES as an example, the structure of the single solenoid type superconducting magnet is analyzed in detail. At the same time, the relationship among magnetic structure parameters, magnetic inductance and energy storage capacity is analyzed to build the mathematical model of the single solenoid type superconducting magnet. Based on the principle of the actively shielding theory of SMES system, three kinds of leakage magnetic shielding magnets are designed. The relationship between the structural parameters and storage capacity of these three kinds of magnets is discussed. And their mathematical models are built respectively.Moreover, according to the analysis of several kinds of magnets, the mathematical calculation models of energy storage values and inductance parameters are built. On this way, by using particle swarm optimization, some restrictions and MATLAB, the structural parameters of these kinds of magnets are optimized respectively. The ANSYS modeling simulation is built by these results. The simulation data of these magnets can be extracted.Finally, all simulation data are analyzed. The data among three improvement plans and single solenoid type superconducting magnet are been contrasted. The comparations of limiting current, the effect of leakage magnetic shielding and dosage of superconducting wire are summarized. It’s turns that all programs have effect on leakage magnetic shielding. The third program has the best effect but the first one uses the least materials. |
