带并联电抗器输电线路三相跳闸后的模电流频率分析

发布时间：2018-06-04 03:55

本文选题：并联电抗器 + 三相跳闸　；参考：《电力自动化设备》2017年05期

【摘要】：利用瞬时性和永久性故障时故障端口的边界条件,由相模变换得到了时域和复频域的复合模网络,进而分析得到了并联电抗器模电流中的低频振荡频率。理论分析及仿真表明:在两侧全跳闸之前,并联电抗器模电流中存在工频分量;两侧均跳闸后,工频分量消失。此后,若该故障为永久性,并联电抗器模电流的振荡频率与故障类型有关,可能不存在低频成分,或者含有1种甚至2种低频成分;若该故障为瞬时性且故障点已熄弧,并联电抗器各模电流仅含1种低频成分;不同故障性质下的振荡频率基本不受故障位置和过渡电阻的影响。该分析结果可用于构造基于并联电抗器模电流频率特性的三相重合闸故障性质识别判据。
[Abstract]:By using the boundary conditions of fault ports in transient and permanent faults, the complex mode networks in time domain and complex frequency domain are obtained by phase mode transformation, and the low frequency oscillation frequency in mode current of parallel reactor is analyzed. Theoretical analysis and simulation show that there are power frequency components in the mode current of the parallel reactor before the full tripping on both sides and the power frequency component disappears after both sides tripping. Thereafter, if the fault is permanent, the oscillation frequency of the mode current of the parallel reactor is related to the type of fault, and there may be no low-frequency component, or one or two low-frequency components; if the fault is transient and the fault point is extinguished, Each mode current of parallel reactor contains only one kind of low frequency component, and the oscillation frequency under different fault properties is not affected by fault location and transition resistance. The results can be used to construct the fault identification criterion of three-phase reclosing based on the mode current frequency characteristics of parallel reactor.
【作者单位】：西安交通大学电气工程学院;许继集团有限公司;
【基金】：国家电网公司科技项目(SGTYHT/14-JS-188)~~
【分类号】：TM75

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