电力系统保护与控制2025，Vol.53Issue(1)：1-12,12.DOI:10.19783/j.cnki.pspc.240217
基于SAO-VMD-S的双端柔性直流输电故障测距方案
Fault location scheme for dual-terminal flexible DC transmission based on SAO-VMD-S
摘要
Abstract
A flexible DC transmission line fault location scheme is proposed to address the problem of signal susceptibility to noise interference and poor transient resistance capability in the fault location process,in which wavelet transform(WT)for noise cancellation and variational mode decomposition(VMD)are used.First,the fault signal is denoised using a Logistic function-based cycling displacement wavelet threshold.Then a snow ablation optimizer(SAO)and VMD are used to effectively decompose the signal.Finally,S-transform(ST)is conducted on the decomposed high-frequency components,and the amplitude curves at the corresponding frequencies are selected for wavehead calibration.In addition,a distance measurement algorithm independent of wave speed is proposed.Simulation verification is performed by building a double-ended flexible DC system in the PSCAD/EMTDC platform.The results show that the proposed scheme not only requires low sampling rate but also has the ability to withstand 300 Ω transient resistance and 30 dB noise,so it is able to accurately measure distances at different fault locations.关键词
柔性直流输电/小波去噪/雪消融优化器/变分模态分解/S变换/故障测距Key words
flexible DC transmission/wavelet denoising/snow melting optimizer/variational mode decomposition/S transformation/fault distance measurement引用本文复制引用
王思华,王羚佰..基于SAO-VMD-S的双端柔性直流输电故障测距方案[J].电力系统保护与控制,2025,53(1):1-12,12.基金项目
This work is supported by the National Natural Science Foundation of China(No.51767014 and No.51867013). 国家自然科学基金项目资助(51767014,51867013) （No.51767014 and No.51867013）
中国铁路总公司科技研究开发计划项目资助(2017010-C) （2017010-C）
