电力系统自动化Issue(20)：108-114,7.DOI:10.7500/AEPS20130922015
基于行波波形相关性分析的直流输电线路纵联保护方案
A Novel Pilot Protection Scheme for HVDC Transmission Lines Based on Waveform Correlation Analysis of Traveling Wave
摘要
Abstract
The differential protection of HVDC transmission lines is easily influenced during fault transient process,which limits its speed of action.Thus,research on a novel pilot protection scheme of better performance is needed.The traveling wave spreading processes in internal and external faults are analyzed.For the external fault,the forward traveling wave on the faulty side and the backward traveling wave on the non-faulty side are the same traveling wave with a strong similarity in waveform.In the case of the internal fault,the forward traveling wave on one side is different from the backward traveling wave on the other with a weak similarity in waveform.According to this feature,a novel high-speed pilot protection scheme based on the waveform correlation analysis of traveling wave is proposed.Simulation results show that the protection scheme proposed is able to rapidly distinguish the internal fault from the external fault,accurately detect the high impedance fault,and correctly identify the faulty pole.The proposed protection is suitable for HVDC systems of different voltage levels and has no high requirements on data synchronization.关键词
直流输电线路/故障行波/波形相关性分析/纵联保护/故障极判别/高阻接地故障Key words
HVDC transmission lines/fault generated traveling wave/waveform correlation analysis/pilot protection/faulty pole identification/grounding fault with high impedance引用本文复制引用
孔飞,张保会,王艳婷..基于行波波形相关性分析的直流输电线路纵联保护方案[J].电力系统自动化,2014,(20):108-114,7.基金项目
国家自然科学基金资助项目(50977074).This work is supported by National Natural Science Foundation of China No.50977074 （50977074）
