Asynchronous fault location of transmission system based on wide area amplitude ratio information of frequency components in traveling wave fronts

被引：0
|
作者：
Peng N. [1 ,2 ]
Wang Z. [1 ,2 ]
Liang R. [1 ,2 ]
Yang Z. [1 ,2 ]
机构：
[1] School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou
[2] Jiangsu Province Laboratory of Electrical and Automation Engineering for Coal Mining, Xuzhou
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2019年 / 39卷 / 04期
关键词：
Aerial-mode traveling wave; Amplitude ratio; Asynchronous measurement; Fault location; RBF neural network; Transmission system;
D O I：
10.16081/j.issn.1006-6047.2019.04.009
中图分类号：
学科分类号：
摘要：
Most of the existing fault location methods of traveling wave in power network mainly rely on the arrival time and wave velocity, which require accurate synchronization. A fault location method for transmission system based on the amplitude ratio information of frequency components in the aerial-mode voltage initial traveling wave front is proposed. Based on the attenuation characteristics of frequency component amplitude in the initial traveling wave front and the shortest propagation paths of traveling wave, a fault line detection criteria based on the difference between the actual and theoretical amplitude ratio of frequency components is constructed by using the virtual fault point method. Under the premise of ensuring the training universality and fewer training samples, the nonlinear relationship between the amplitude ratio of two different frequency components in the traveling wave front and the actual fault location is fitted by using RBF(Radial Basis Function) neural network, which can realize accurate fault location. The proposed method only relies on the amplitude ratio information of lower frequency component and does not need to arrange measuring points in the whole system and synchronize accurately. The simulation model of IEEE 30-bus system is set up in PSCAD/EMTDC, and the simulative results verify the high accuracy and reliability of the proposed method. © 2019, Electric Power Automation Equipment Press. All right reserved.
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页码：56 / 62
页数：6
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