Time-frequency multiresolution of fault-generated transient signals in transmission lines using a morphological filter  

作　　者：Juan Carlos Quispe John Morales Eduardo Orduna Carlo Liebermann Michael Bruhns Peter Schegner 

机构地区：[1]Universidad Nacional de San Juan-CONICET,San Juan,Argentina [2]Universidad Tecnológica del Perú,Lima,Perú [3]Technical University of Dresden,Dresden,Germany

出　　处：《Protection and Control of Modern Power Systems》2023年第2期85-98,共14页现代电力系统保护与控制（英文）

基　　金：German academic exchange service(DAAD)and CONICET.

摘　　要：The ongoing transformation of electrical power systems highlights the weaknesses of the protection schemes of traditional devices because they are designed and configured according to traditional characteristics of the system.Therefore,this work proposes a new methodology to study the fault-generated high frequency transient signals in transmission lines through multiresolution analysis.The high frequency components are determined by a new digital filtering technique based on mathematical morphology theory and a spectral energy index.Consequently,wide spectra of signals in the time–frequency domain are obtained.The performance of this method is verified on an electrical power system modeled in ATP-Draw,where simulation and test signals are developed for different locations,fault resistances,inception angles,high frequency noises,sampling frequencies,types of faults,and shapes of the structuring element.The results show the characteristics of the fault such as the traveling wave frequency,location,and starting time.

关 键 词：Digital filter High frequency Mathematical morphology Time–frequency Traveling waves 

分 类 号：TM773[电气工程—电力系统及自动化]