永磁偏置型故障限流器对系统暂态稳定性的影响

发布时间：2018-01-10 03:30

本文关键词：永磁偏置型故障限流器对系统暂态稳定性的影响　出处：《高电压技术》2017年02期 　论文类型：期刊论文

【摘要】：永磁偏置型故障限流器(permanent-magnet-biased saturation based fault current limiter,PMFCL)的使用会对电力系统的暂态稳定性产生一定影响。为此,首先介绍了PMFCL的基本工作原理,并以单机无穷大系统为例,利用正序增广网络建立了含PMFCL的暂态稳定分析模型;其次基于发电机功角曲线和等面积法则,详细分析了在输电线路不同位置发生不同类型的短路故障时PMFCL限流电抗值以及故障切除时间对系统暂态稳定性的影响;最后通过时域仿真计算出发电机在不同短路故障类型下的输出功率最大值和功角变化曲线。结果表明:输电线路发生三相对称短路时,PMFCL限流电抗值越大则越有利于系统的暂态稳定性;线路中间部分发生单相接地故障时,限流电抗值越大则越不利于系统的暂态稳定性,此时可适当延长故障切除时间来改善系统的暂态稳定性;两相接地短路和两相短路故障下,PMFCL对系统暂态稳定性的影响规律基本一致。以上针对PMFCL对系统的暂态稳定性影响所开展的研究,为PMFCL的元件参数优化提供了参考,也为其实际应用提供了理论依据。
[Abstract]:Permanent magnet bias fault current limiter (. Permanent-magnet-biased saturation based fault current limiter. The use of PMFCLs will have a certain impact on the transient stability of power systems. For this reason, the basic working principle of PMFCL is introduced, and the single machine infinite bus system is taken as an example. The transient stability analysis model with PMFCL is established by using the positive sequence augmented network. Secondly, it is based on the generator power angle curve and the law of equal area. The effect of PMFCL current limiting reactance and fault removal time on the transient stability of the system is analyzed in detail when different types of short-circuit faults occur in different locations of transmission lines. Finally, the maximum output power and power angle curves of generator under different short-circuit fault types are calculated by time-domain simulation. The results show that: the transmission line occurs three-phase symmetric short circuit. The larger the current limiting reactance of PMFCL is, the better the transient stability of the system is. When the single-phase grounding fault occurs in the middle part of the line, the larger the current limiting reactance is, the more disadvantageous the transient stability of the system is, and the fault removal time can be extended appropriately to improve the transient stability of the system. The influence of PMFCL on the transient stability of the system under two-phase grounding and two-phase short-circuit faults is basically the same. The research on the influence of PMFCL on the transient stability of the system is carried out. It provides a reference for the optimization of component parameters of PMFCL, and also provides a theoretical basis for its practical application.
【作者单位】：山东大学电气工程学院;山东省特高压输变电技术与装备重点实验室(山东大学);
【基金】：新能源电力系统国家重点实验室开放课题(LAPS14007)~~
【分类号】：TM471;TM712
【正文快照】： 2.山东省特高压输变电技术与装备重点实验室(山东大学),济南250061)Influence of Permanent-magnet-biased Saturation Based Fault Current Limiteron Transient Stability of Power SystemZOU Liang1,ZHANG Xiuqun1,ZHAO Tong2,ZHANG Li2,LOU Jie2(1.School of Electrical E

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