共查询到18条相似文献,搜索用时 156 毫秒
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基于超导托卡马克纵场线圈构成的超导磁体储能不停电电源,可用来避免由于电网嬗变或秒级跳闸使低温和真空系统掉电导致的托卡马克装置中的超导磁体失超。文中为SMES-UPS设计的是电流型变流器系统,该系统既可用作为纵场磁体正常工作时的励磁电源又可用作电网故障时关键负载的备份电源。文章对该SMES-UPS变流器的不同工作条件下的原理和控制目标做了说明,对不同控制目标提出了相应的简单易实现的控制策略,并用Matlab进行了数字仿真,验证了控制策略的可行性。 相似文献
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介绍了国际热核聚变堆(ITER)装置的电源系统设计,包括超导磁体电源系统、常规内部线圈电源系统、微波加热电源系统和中性粒子注入系统电源系统,以及超导托卡马克装置的电源系统独特的负载特性和技术要求,最后对中国承担的电源采购包内容和进展也进行了简要介绍。 相似文献
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蓄电池-超导磁体储能系统平抑间歇性电源出力波动的研究 总被引:1,自引:0,他引:1
分析了使用蓄电池-超导磁体混合储能系统平抑间歇性电源出力波动的基本原理,给出了电源并网装置和混合储能装置的拓扑结构以及二者间的接口电路.设计并实现了基于中央控制单元和本地控制单元双层控制结构的储能控制系统,中央控制单元使用滑动平均滤波器分离功率指令中的低频成分再指派给蓄电池承担,并将剩余快速变化分量分配给超导磁体承担;本地控制器使用PI控制规律控制蓄电池和超导磁体分别跟踪功率指令和电压指令.PSCAD/EMTDC仿真结果验证了所设计系统与控制方法的有效性. 相似文献
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A conduction-cooled superconducting magnet with central field of 10T and warm bore of 100 mm was designed based on a Nb3Sn and two NbTi superconducting coils. At the first stage, the NbTi coils have been fabricated and tested. A two-stage 4 K Gifford-McMahon (GM) cryocooler with the second-stage power in 1W, 4.2K is used to cool the magnet from room temperature to 4 K. The superconducting magnet with the same power supply has the operating current of 116A. The magnet can be rotated with a support frame to be operated with either horizontal or vertical position. A pair of Bi-2223 high temperature superconducting current leads was employed to reduce heat leakage into 4.2K level. The NbTi coils reachto the operating current of 120A without training effect to be observed during charging of the magnet during 40 minutes charging time and generate the center field of 6.5T. The training effect in the NbTi magnet directly cool-down by cryocooler and inter-winding support structure in magnet can be remarkably improved. The superconducting magnet has been stably operated for more than 275 hours with 6.5T. In this paper, the detailed design, fabrication, stress analysis and quench protection characteristics are presented. 相似文献
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35 kJ/7 kW直接冷却高温超导磁储能系统 总被引:3,自引:0,他引:3
介绍了直接冷却高温超导磁储能(SMES)系统(35kJ/7kW)的总体结构和基本试验结果。该系统主要由超导磁体、低温系统、功率调节系统和监控系统组成。实验结果表明,通过直接冷却将储能磁体成功冷却到了20K以下;储能磁体的直流临界电流达到150A,临界储能量84kJ,磁体中心场强4.5T;监控系统和变流器能控制SMES与系统快速独立地在四象限进行有功功率和无功功率交换;在电力系统动态模拟实验中,SMES能有效抑制电力系统中因发电机机端短路故障引起的功率振荡。 相似文献
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超导磁体失超检测电路的设计 总被引:1,自引:0,他引:1
超导磁体的失超检测与保护是超导电力技术实用化的一个重要课题。为了实现对超导储能混合磁体的失超检测与保护,本论文根据混合磁体的特点及结构,在现有有源功率检测的基础上,提出了一种针对超导混合磁体的电压校正电路,通过对混合超导磁体上产生的失超信号进行隔离、放大、滤波以及比较等,实现失超信号的检测。设计并完成了失超检测系统硬件电路的制作与调试。通过搭建高温超导线圈的实验装置,在高温超导储能磁体上进行失超检测的实验研究,得出了电压矫正前后的线圈电压波形。给线圈分别以不同速度充电,研究充电速度对阀值电压、失超的起始点及临界电流的影响。实验线圈电压波形表明,该失超检测系统能及时、有效地检测超导混合磁体失超的发生。 相似文献
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针对直驱风电系统并网运行过程中存在的输出有功功率波动和低电压穿越问题,在变换器的直流环节并联超导储能系统。对超导储能系统的斩波器提出双闭环加脉冲判断的控制策略,确保超导磁体线圈电流水平,使超导储能系统可以快速、准确地充放电,从而稳定直流环节功率。同时,通过引入谐振控制器的方法,对网侧变换器的控制策略进行改进,实现电网电压不对称跌落情况下,负序分量引起波动的有效控制。仿真结果表明,采用上述方案后直驱风电系统向电网输送较为平滑的有功功率、低电压穿越能力得到了提升。 相似文献
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ⅠIntroductionIt is expected that the middle and small-scale mag-nets immersed in liquid helium will be replaced by theeasy-operating conduction cooled superconducting magnetin near future[1~3].For the aimof superconducting mag-net applications in the advanced material processing,awide bore conduction-cooled superconducting magnet withavailable warmbore of100 mmand center field of 10 Twas designed.The NbTi superconducting coils have beenfabricated and tested.The systemis automated by using… 相似文献
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The increasing wind power penetration poses significant technical problems to the development of electric power systems. In this article, an integrated control strategy is proposed based on the characteristics of the directly driven permanent magnet synchronous generator wind turbine. The directly driven permanent magnet synchronous generator wind turbine is incorporated with superconducting magnetic energy storage, which can smooth the wind power fluctuations, enhance the low-voltage ride-through capability of the wind generation system, and achieve an uninterruptible power supply to local loads under isolated grid operation. According to the MATLAB/SIMULINK-based (The MathWorks, Natick, Massachusetts, USA) digital computer simulation model, the proposed control strategy is confirmed to be effective in power control of grid operation. 相似文献