【作者】 陈路；

【导师】 任丽；

【作者基本信息】 华中科技大学 ， 电气工程， 2016， 硕士

【摘要】 超导磁储能系统(SMES)具有响应时间短和效率高的特点,在电力系统中可起到提高系统稳定性、改善电能质量、用作分散电源系统和能量管理等作用。超导磁体是SMES的关键部件,其优化设计需综合考虑电磁场、应力场和温度场等多个因素的影响,是超导电力技术中的关键问题之一。本论文围绕高温超导储能磁体的电磁、力、热分析展开研究,进行了10MJ高温超导储能磁体的电磁与结构设计,完成的主要工作和取得的成果如下:(1)实验测量了两类高温超导带材的电磁特性和应力/应变特性,构建了磁体仿真插值计算的数据库,以超导带材总用线量最小为目标,进行了10MJ高温超导储能磁体的电磁设计和优化,给出了用线量和储能量符合设计目标、漏磁场小的储能磁体的初始电磁设计方案。(2)设计了10MJ高温超导磁体的支撑结构和导冷结构,建立了高温超导储能磁体电磁应力计算的等效简化模型,仿真计算了高温超导磁体在工作电流下的应力分布,计算了超导线圈内外支撑结构、导冷板和加固板的应力分布以及受应力影响的形变情况。(3)提出了基于结构优化的二次优化思路:在初始电磁设计方案的基础上,计算了超导线圈的最大径向应力以及导冷板、加固板和内外支撑的最大等效应力,通过调整初始电磁参数和结构参数完成超导磁体的二次优化。优化结果表明,所选设计方案综合考虑了超导线圈的临界电流和支撑材料的强度等因素,符合设计目标。(4)提出了经验公式法计算环型磁体交流损耗的方法,计算了典型工况下储能磁体的交流损耗分布,仿真分析了储能磁体的降温过程及在功率交换下磁体的热稳定性。更多还原

【Abstract】 The superconducting magnetic energy storage system(SMES) has the characteristics of short response time and high efficiency. It can improve the stability of the system and the power quality. Superconducting magnet is a key part of SMES. The optimization of the design needs to consider the influence of electromagnetic field, stress field and temperature field. It is one of the key problems in the superconducting power technology. This paper focuses on the study of electromagnetic, force and thermal analysis of high temperature superconducting magnetic energy storage magnet. The electromagnetic and structural design of 10 MJ high temperature superconducting magnetic energy storage magnet is carried out. The main work and achievements are as follows:(1) The electromagnetic characteristics of two types of HTS tapes and stress/strain characteristics are measured to construct a database of magnet interpolation simulation. We set the length of the superconducting tapes as the goal to achieve the 10 MJ HTS magnet design and optimization, and finally propose an initial electromagnetic design scheme.(2) The supporting structure and cooling structure of 10 MJ high temperature superconducting magnet are designed. The equivalent simplified model of SMES is established to calculate the stress and strain distribution of the superconducting coil, the supporting structure, the cold guiding plate and the reinforcement plate.(3) A further optimization is proposed based on structure optimization: The maximum radial stress on the superconducting coil is calculated, either is the maximum equivalent stress on the guide cold plate and reinforcement plate. To optimize the magnet, the initial electromagnetic parameters and structure parameters are adjusted. The optimization results show that the critical current of the superconducting coil and the strength of the support material are both considered in the design, which meet the design goal.(4) An empirical formula calculation method is proposed to achieve the AC loss calculation. AC loss distribution is simulated, either is the magnet cooling process and the thermal stability of the magnet in the power exchange.更多还原