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Performance Analysis of an Improved Flux-Coupling-Type SFCL in a Medium-Voltage Wind Turbine Generation System
IEEE Transactions on Applied Superconductivity ( IF 1.8 ) Pub Date : 2021-06-21 , DOI: 10.1109/tasc.2021.3091079
Lei Chen , Xinyi Deng , Meng Ding , Hongkun Chen , Guocheng Li , Yanhong Li , Lei Wang , Huiwen He

This paper proposes an improved flux-coupling-type superconducting fault current limiter (FC-SFCL) with multiple working modes, and investigates the efficacy of the improved FC-SFCL in guarding a medium-voltage wind turbine generation system (WTGS). The improved FC-SFCL is mainly consisting of a coupling inductance with superconducting and conventional coils, two high-speed switches, a shunt resistance and an additional limiting resistance. Under normal circumstances, the improved FC-SFCL shows little impedance to not disturb the system. In terms of fault severities, the two high-speed switches are flexibly and separately controlled to change the current paths, and the improved FC-SFCL can appear two-level limiting impedances to affect the system's transient response. The performance validation of the improved FC-SFCL in a 35 kV class WTGS is done. From the theoretical derivation and simulation assessment, the results well testify the effectiveness of the improved FC-SFCL. The fault currents in the WTGS are timely suppressed to reasonable levels, and the fluctuations in the power and torque of the WTGS are visibly reduced. A beneficial voltage quality improvement is to maintain the grid connection of the WTGS and make it ride through the serious short circuit fault successfully.

中文翻译:

改进的磁通耦合型SFCL在中压风力发电机组中的性能分析

本文提出了一种具有多种工作模式的改进型磁通耦合型超导故障限流器 (FC-SFCL),并研究了改进型 FC-SFCL 在保护中压风力发电机系统 (WTGS) 中的功效。改进的 FC-SFCL 主要由一个带有超导和常规线圈的耦合电感、两个高速开关、一个分流电阻和一个附加的限流电阻组成。在正常情况下,改进的 FC-SFCL 表现出很小的阻抗,不会干扰系统。在故障严重程度方面,两个高速开关灵活独立控制改变电流路径,改进后的FC-SFCL可以出现两级限制阻抗影响系统的瞬态响应。在 35 kV 级 WTGS 中对改进的 FC-SFCL 进行了性能验证。从理论推导和仿真评估来看,结果很好地证明了改进的FC-SFCL的有效性。及时将风电机组中的故障电流抑制在合理水平,显着减小风电机组功率和转矩波动。一个有益的电压质量改进是保持WTGS的并网并使其成功渡过严重的短路故障。
更新日期:2021-07-27
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