高温区运行Micro-SMES研发及其系统仿真分析

Development and simulation of systematic of Micro-SMES for operating at high-temperature regions

近年来第Ⅱ代YBCO高温超导涂层导体的制备工艺取得巨大的进展,其优越于第Ⅰ代BSCCO高温超导体的性能使它在电力领域的应用受到广泛重视。本文考虑到YBCO涂层导体磁场下各向异性载流特性,在确保储能容量的基础上最大限度地减少导体用量获得超导磁储能(SMES)磁体的优化;依据磁体损耗和引线漏热分析进行过冷液氮低温系统的整体设计;采用斩波器和电压型变换器实现SMES与系统间的能量/功率传递;通过仿真建模探索其在电力系统中的作用和影响,并对应用的可行性进行了探讨。

There has been remarkable progress in the technology for producing coated conductors recently. Long YBCO tapes would be widely devoted to various practical applications such as power cables, fault-current limiters and SMES. In the paper, an optimal design of a Micro-SMES magnet is proposed to minimize the amount of conductor material usage. This is obtained by considering anisotropic B-I characteristic of YBCO coated conductor while maintaining the energy storage capacity. The losses of the coils and current leaders were analyzed for the basic evaluation to the design of the sub-cooled liquid nitrogen （LN2） cryogenic system. A voltage-source-convertor （VSC） is empolyed to achieve the transimmison of energy and power between the SMES and the power system. The simulation of SMES was performed to investigate its roles in power system. Finally, the feasibility of its practical applications was discussed.