Electromagnetic, Thermal And Mechanical Design Of High Temperature Superconducting Energy Storage Magnet

In nowdays, superconducting magnet technology plays an irreplaceable role in health care, transportation, energy, military, frontier science and technology and other fields. In the power system, the demands for high-power active and reactive power regulation and large-scale energy storage promote the development of superconducting magnetic energy storage (SMES) technology while the use of high-temperature superconducting materialsis improve the performance of SMES system significantly. As the most central parts of the system, the SMES magnet is a typical representative of the superconducting magnet; its design requires a comprehensive application of key technologies of electromagnetic, low-temperature, mechanical and other fields.Focusing on electromagnetic, thermal and mechanical design method for high-temperature SMES magnets, this articl mainly completes the following tasks:1. Measured and summed up electromagnetic anisotropy, critical current-temperature characteristics and critical stress/strain characteristics of the mainstream typeo of high-temperature superconducting (HTS) tapes, according to which, rules of employing different types of HTS tapes in design of magnet are maked and method of improving magnets storage energy by constructing hybrid magnes is proposed.2. Proposed a general idea of decoupled and coupled analysis of multi-physics of HTS magnet, which is a comprehensive optimization method with electromagnetic design as core content, the magnetic field data as link and danger zones as main improvements.3. In electromagnetic design of the superconducting magnet part, a new superconducting magnet critical current calculation method-"magnetic field vector analysis method" is proposed and verified by experiment.4. In cryogenic system design part, Main types of heat load and its suppression method of the superconducting magnet are discussed and the conceptual design of150kJ/100kW high-temperature SMES magnet cryogenic system is completed. A method of analysis of the thermal stability of the superconducting magnetis is proposed, What is more, stability of the150kJ/100kW SMES scheme in extreme conditions and low load conditions are analysed with this method. 5. In superconducting magnet mechanical calculations part, impact of thermal stress on processing and operation of superconducting magnet is analysed, superconducting magnets process guidance is recommended; strain method and stress method are emloyed on the structural stability analysis of the150kJ/100kW SMES magnet scheme to determine the danger zone of the magnets which are the most easily damaged.