基于S变换的多端输电网故障定位方法

发布时间：2018-03-07 05:25

本文选题：故障定位　切入点：多端输电网　出处：《电力系统保护与控制》2014年23期 　论文类型：期刊论文

【摘要】：针对现有对于多端输电线路故障定位方法研究的不足,提出了一种基于暂态行波的多端输电网故障定位新方法。对各检测端母线电压线模分量应用S变换,从中提取出奈奎斯特频率分量单频率行波的幅-时变化特性,幅值最大值对应的时刻即为行波波首的到达时刻。采用该频率分量对应的行波波速作为计算用波速,解决了波速不确定的问题。将多端输电网看作含有一条干路和若干支路的集合,形成从支路到干路逐一排除的故障定段方案。最后,依定段结果与双端测距原理计算出故障点准确位置。仿真分析结果表明,定位精确、可靠,算法抗噪性及适应性强。
[Abstract]:Aiming at the deficiencies of the existing research on fault location method of multi terminal transmission lines, this paper proposes a new method of transient traveling wave fault location based on multi terminal transmission network. The terminal bus voltage line mode component using S transform, extracted from the Nyquist frequency component of single frequency traveling wave amplitude change characteristics, corresponding to the maximum amplitude time is the arrival time of the first wave. The wave velocity using the corresponding frequency components as calculated by the wave velocity, solve the problem of uncertainty. The multi terminal transmission network as a set containing roads and several branches, formed from the fault branch to the road one by one rule scheme. Finally, according to the regulations results of double ended ranging principle to calculate the exact location of the fault. The simulation results show that the algorithm is reliable, precise positioning, anti noise and strong adaptability.

【作者单位】：湖南大学电气与信息工程学院;湖南省电力公司长沙电业局;
【基金】：国家自然科学基金项目(61102039)~~
【分类号】：TM73

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