Design And Investigation Of A Solenoidal Superconducting And Normal Hybrid Pulsed Power Transformer

Pulsed power technology is an emerging discipline, which not only has essential applications in defense-related and high-tech fields, but also has great potential in industrial and civil departments increasingly. As a new technology combined superconducting technology with pulsed power technology, superconducting magnetic energy storage pulsed power technology can not only realize high-density energy, but has specific characteristics such as long storage time, no energy loss, small size, and light weight. All these characteristics meet the requirements of miniaturization, integration and practical utility for the future works.As a major component in the pulsed power system, superconducting pulsed power transformer can reduce parallel modules of superconducting energy storage magnet effectively, improve the peak value of pulsed current, and play an important role to decrease systematic size and cost. On the basis of theoretical analysis and simulation, this paper develops a solenoid superconducting and normal hybrid pulsed power transformer, which includes detailed design processes of epoxy skeleton, secondary normal winding, primary superconducting winding, and current lead. After the measurement of primary static parameters, dynamic performance of pulsed power transformer is tested by our existing laboratory conditions. The testing results have verified the feasibility of structural design and discharge circuit. However, traditonal discharge mode remains some drawbacks such as high instantaneous voltage across opening switch, slow rate of current change, and low efficiency. Taking account of these drawbacks, our group proposes three intermediate conversion circuits, including linear resistor, non-linear resistor, and capacitor. Through simulated analysis and experimental investigation, all three conversion circuits can effectively inhibit high voltage across opening switch and improve efficiency of the entire system.Finnally, aiming at the structural characteristics of pulsed power transformer, this paper proposes two auto pulsed-power supply modes consisting of capacitor and non-linear resistor respectively. The simulation and experimental results indicate that both of discharge modes based on the superconducting and normal hybrid pulsed power transformer are feasible, which not only achieve high peak value of pulsed current, relieve the pressure of opening switch, but also improve efficiency by a large margin. Additionally, in the operation of superconducting energy storage pulsed power system, superconducting and normal hybrid pulsed power transformer really realizes the combination of energy storage and discharge, and has better performances like small size, low loss, high efficiency, and low requirement of opening switch. The outstanding performances meet the requirements of miniaturization, integration and practical utility and have laid the theoretical and practical foundation effectively for the future study on large-scale current of superconducting magnetic energy storage pulsed power system.