机电工程技术2024，Vol.53Issue(4)：312-315,329,5.DOI:10.3969/j.issn.1009-9492.2024.04.068
基于自定义电流突变量的高压直流输电线路纵联保护原理
Fast Pilot Protection for HVDC Transmission Line Based on Custom Current Mutation
余如龙 1孟庆法1
作者信息
- 1. 无锡市检验检测认证研究院,江苏无锡 214101
- 折叠
摘要
Abstract
DC line protection is a key issue in the development of DC transmission line technology,and its main technical difficulty lies in quickly and reliably identifying line faults.Current differential protection is obviously affected by distributed capacitor current,which needs delay and slow action.However,other existing longitudinal protections still have room for improvement in dependence on boundary elements,fault resistance tolerance and anti-interference ability.In order to solve the above problems,the fault transient characteristics of current abrupt change of HVDC transmission lines is analyzed,and a new concept of current abrupt change is defined,which can effectively identify internal faults and external fault by using the polarity characteristics of custom current mutation.On this basis,a fast pilot protection method for HVDC transmission lines based on custom current mutation is proposed.Finally,the proposed protection method is verified by PSCAD/EMTDC simulation model.The proposed protection scheme has the advantages of no delay,fast action speed,no dependence on boundary elements,high tolerance of fault resistance and strong anti-interference ability,and has high sensitivity and reliability.关键词
高压直流输电/线路保护/纵联保护/电流突变量/自定义电流Key words
HVDC transmission/line protection/pilot protection/current mutation/custom current分类
信息技术与安全科学引用本文复制引用
余如龙,孟庆法..基于自定义电流突变量的高压直流输电线路纵联保护原理[J].机电工程技术,2024,53(4):312-315,329,5.
