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| 1 | Energy-saving Superconducting Magnetic Energy Storage(SMES)Based Interline DC Dynamic Voltage Restorer显示文摘The fast-response feature from a superconducting magnetic energy storage(SMES)device is favored for suppressing instantaneous voltage and power fluctuations,but the SMES coil is much more expensive than a conventional battery energy storage device.In order to improve the energy utilization rate and reduce the energy storage cost under multiple-line power distribution conditions,this paper investigates a new interline DC dynamic voltage restorer(IDC-DVR)scheme with one SMES coil shared among multiple compensating circuits.In this new concept,an improved current-voltage(I/V)chopper assembly,which has a series of input/output power ports,is introduced to connect the single SMES coil with multiple power lines,and thereby satisfy the independent energy exchange requirements of any line to be compensated.Specifically,if two or more power lines have simultaneous compensating demands,the SMES coil can be selectively controlled to compensate the preferable line according to the priority order of the line.The feasibility of the proposed scheme is technically verified to maintain the transient voltage stability in multiple-line voltage swell and sag cases caused by either output voltage fluctuations from external power sources or power demand fluctuations from local sensitive loads.The simulation results provide a technical basis to develop a cost-effective SMES-based IDC-DVR for use in various DC distribution networks. | Xiaoyuan Chen Qi Xie Xingming Bian Boyang Shen | 2022 | CSEE Journal of Power and Energy Systems2022，8，1： | 4 |
| 2 | 规模化超导储能磁体概念设计及系统经济性评估显示文摘在以新能源为主体的新型电力系统中,电力储能系统将会面临着能量交互次数越来越多、容量越来越大的迫切需求。建立了轴向气隙优化型超导储能磁体结构设计模型,初步形成了规模化超导储能概念设计方案。给定相同的10 km超导线长度,优化后的磁体储能量相比传统螺线管提高了约30%,有效降低了单位储能投资成本。考虑日均330次储能充放电需求的新能源应用场合,10.8 GJ/3 MWh规模化超导储能的瞬态峰值功率补偿能力相当于495 MWh电池储能系统,且超导储能运行10年后的总投资成本将会低于电池储能。因此,在能量交互日益频繁的新能源电力系统中,超导储能系统有望实现更低的储能容量及投资成本,缓解电池储能的过充/过放压力,延长电池储能的使用寿命,提高电力储能的整体经济效益。 | 陈孝元 张名顺 庞洲 雷一 李海波 | 2022 | 南方电网技术2022，16，4： | 3 |
| 3 | 基于超导磁储能和变流器重构的DFIG连续故障穿越方案显示文摘由高压直流输电系统换相失败引起的送端风电场母线低高电压连续故障,会对双馈感应发电机(DFIG)产生严重的暂态冲击,现有单一的风机低压、高压故障穿越方案难以完全适应此类连续故障穿越的要求。为此,提出了一种结合重构式网侧变流器与超导磁储能装置的软硬件协同穿越方案,以提升DFIG的连续故障穿越能力。在故障期间,网侧变流器由并联运行模式切换至串联运行模式,以维持定子端电压不变为目标,并控制转子侧变流器根据并网点电压自适应发出动态感性/容性无功电流。仿真结果表明,所提方案既可以维持DFIG的机端电压,又可以为电网提供无功支撑,有效地实现DFIG的低高电压连续故障穿越。 | 郑子萱 宋东徽 杜凯健 肖先勇 谢琦 | 2022 | 电力自动化设备2022，42，9： | 2 |
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