GOALI-Technologies Joint Research Project

ECS-9801139 Liu 弗吉尼亚理工大学和BWX技术公司提议通过弗吉尼亚理工大学的行业存在，研究超导线圈与FACTS/储能应用的电力电子接口之间的电磁相互作用。 该项目将得到BWXT，弗吉尼亚理工大学和NSF GOALI计划的支持。 本研究计划的目的是利用电磁暂态程序（EMTP）建立超导线圈、电力电子和电力系统的综合电磁模型。 建模将涉及多兆瓦电压源逆变器和DC-DC斩波器的详细表示，包括控制和保护。 超导线圈将由BWX Technologies进行的有限元电磁分析得出的分布电感和电容表示。 需要控制叠加到DC电压的瞬变、浪涌和纹波，以避免线圈内的激励谐振，这可能引起超过线圈电绝缘能力的电压。 该研究将调查多相斩波器的效率，更高的开关频率和保护措施，以确保综合系统的正常运行。 此外，还将模拟和调查外部和内部故障的潜在后果，并提出保护措施。 该研究的结果将是一个完整且集成的EMTP模型，用于代表电力电子器件、电力系统（到公共耦合的实用点）和超导线圈。 这项研究将确定最坏的瞬态条件，并提出补救和保护解决方案。 最重要的是，通过这个过程，我们希望将行业的观点和综合技能带到我们身边，并交流新的想法和知识。 如果没有这种共同努力，VT或BWX都无法单独进行提案研究。

ECS-9801139 Liu Virginia Tech and BWX Technologies propose to investigate the electromagnetic interactions between a superconducting coil and the power electronics interface for FACTS/Energy storage applications through industry presence at Virginia Tech. The project will have the support of BWXT, Virginia Tech, and the NSF GOALI program. The objective of this research project is to develop an integrated electromagnetic model of the superconducting coil, the power electronics and power systems using the EMTP (Electromagnetic Transient Program). The modeling will involve a detailed representation of a multi-MW voltage source inverter and the DC-DC chopper including controls and protection. The superconducting coil will be represented by distributed inductances and capacitances derived from a finite element electromagnetic analysis performed by BWX Technologies. The transients, surges, and ripples superimposed to the DC voltages need to be controlled to avoid exciting resonances within the coil which can provoke voltages exceeding the capabilities of the coil electrical insulation. The study will investigate the efficiency of multi-phase choppers, higher switching frequencies and protection measures to guarantee the proper operation of the integrated system. Also external and internal faults will be simulated and investigated for their potential consequences, and protection measures will be proposed. The outcome of the study will be a complete and integrated EMTP model for representing the power electronics, power systems (to the utility point of common coupling) and superconducting coil. The study will determine the worst transient conditions and propose remedial and protective solutions. Most importantly, through this process, we hope to bring industry's perspective and integrative skills to academe and exchange new ideas and knowledge. Without this joint effort, neither VT or BWX would be able to carry out the proposal research alone.