高电压技术2025，Vol.51Issue(2)：806-815,中插22,11.DOI:10.13336/j.1003-6520.hve.20240716
基于参数辨识的柔性直流输电线路单端量保护方案
Single-ended Protection Scheme for Flexible DC Transmission Lines Based on Parameter Identification
摘要
Abstract
There is a problem that the sensitivity of multi-terminal flexible HVDC line travelling wave protection is in-sufficient when the fault of the remote end is high resistance.Firstly,this paper analyzes the characteristics of the line mode current wave in the internal and external faults of the flexible HVDC line,and constructs the direction criterion ac-cording to the forward wave and the inverse traveling wave.Secondly,through the construction of line transfer function,the first traveling wave expression of fault current at protection installation is analyzed when different faults occur.On this basis,the parameters of the measured signal are identified,the current reference function inside and outside the region is constructed,and the fault identification criteria inside and outside the region is constructed using the difference between the measured data and the calculated data.Finally,fault pole selection is realized based on the weighted ratio of fault components of positive and negative current.The simulation results of PSCAD show that the scheme can reliably identify faults inside and outside the line area,and has high resistance to transition and certain anti-noise interference ability.关键词
柔性直流输电线路/单端量保护/行波保护/暂态能量/参数辨识/线模电流Key words
flexible DC transmission line/single-end protection/traveling wave protection/transient energy/parameter identification/wire mode current引用本文复制引用
金恩淑,张文杰,胡晓晨,杨德建,陈锦星..基于参数辨识的柔性直流输电线路单端量保护方案[J].高电压技术,2025,51(2):806-815,中插22,11.基金项目
吉林省教育厅项目(JJKH20240141KJ).Project supported by Jilin Provincial Department of Education Project(JJKH20240141KJ). （JJKH20240141KJ）
