电力系统保护与控制2025，Vol.53Issue(3)：13-26,14.DOI:10.19783/j.cnki.pspc.240258
基于波形匹配的柔性直流输电线路单端量保护研究
Research on single-ended protection of a flexible HVDC transmission line based on waveform matching
摘要
Abstract
Flexible HVDC technology is powerful in addressing the integration of large-scale renewable energy,and its line protection is key to ensuring system safety and stability.Single-ended protection of the line does not require communication and can better meet the time requirements of flexible HVDC transmission systems.However,the performance of existing single-ended protection in flexible HVDC transmission systems is significantly affected by subsequent traveling waves,resulting in a certain range of protection dead zones.To address this,based on fully considering the impact of subsequent traveling waves on the initial traveling wave,the differences between internal and external fault traveling waves are explored,and a fault identification criterion based on waveform matching is proposed.This criterion can measure the impact of subsequent traveling waves by combining matching errors with matching waveform characteristics,ultimately achieving full-line rapid protection.A four-terminal flexible DC transmission system is built based on PSCAD/EMTDC.Simulation results verify the feasibility of the proposed method,which has the advantages of a long protection range,strong tolerance to transition resistance,and strong anti-noise interference capability.关键词
柔性直流输电/后续行波/波形匹配/波形特征/单端量保护Key words
flexible HVDC transmission/subsequent traveling wave/waveform matching/waveform characteristic/single-ended protection引用本文复制引用
贾科,刘可歆,毕天姝,姚昆鹏,陈帅,李再男..基于波形匹配的柔性直流输电线路单端量保护研究[J].电力系统保护与控制,2025,53(3):13-26,14.基金项目
This work is supported by the Science and Technology Project of State Grid Corporation of China(No.5100-202199530A-0-5-ZN and No.5211DS21N013). 国家电网有限公司科技项目"新能源电力系统协同控制保护系统及应用"资助(5100-202199530A-0-5-ZN,5211DS21N013) （No.5100-202199530A-0-5-ZN and No.5211DS21N013）
