摘要
传统的行波测距算法精度高度依赖于初始行波波速的计算,而行波波速与行波的频谱高度相关。因输电线路、换流站等的依频特性,在测距装置安装处检测到的行波频谱会发生显著畸变。据此,本工作在充分研究输电线路、换流站依频特性的基础上,提出一种新型频谱校正算法,进一步提出高精度双端行波测距新方法。基于PSCAD/EMTDC平台建立了直流输电仿真系统,仿真结果表明本工作算法测距精度相对传统算法有显著提升,且在不同故障类型、故障位置、过渡电阻的影响下仍旧具有较强的鲁棒性。
The fault location accuracy of traditional travelling wave algorithm is highly related to the calculation of the initial travelling wave velocity,of which is highly related to travelling wave spectrum.Due to the frequency dependent characteristics of transmission lines and converter stations,the spectrum of TW signal detected at measuring device contains distortion.Based on the complete research of frequency dependent characteristics of transmission lines and converter stations,the paper proposes a high-precision two-terminal travelling wave fault location approach,based on novel travelling wave spectrum correction algorithm.Afterwards,a simulation model of DC transmission system is established on PSCAD/EMTDC software,and the simulation results show that the proposed algorithm has smaller fault location errors comparing with conventional approach.Besides,it has good robustness under the influence of fault type,fault location and transition resistance issues.
作者
叶冰
王栋
YE Bing;WANG Dong(College of Automation and Electronic Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)
出处
《青岛科技大学学报(自然科学版)》
2025年第3期119-127,151,共10页
Journal of Qingdao University of Science and Technology:Natural Science Edition
基金
山东省自然科学基金项目(ZR2020QE213).
