电工技术学报2017，Vol.32Issue(7)：84-94,11.
基于计算电阻的高压直流输电线路纵联保护
A Pilot Protection Scheme for HVDC Transmission Lines Based on Calculated Resistance
摘要
Abstract
Since the traditional current differential protection for high voltage direct current(HVDC) is significantly influenced by distributed capacitance and of poor reliability,a novel pilot protection algorithm based on calculated resistance is proposed.The calculated resistance is calculated by using the dc component of fault component at both terminals of the line.When internal faults occur,the calculated resistance is relatively low;when external faults occur,the calculated resistance is very high.Upon the basis of that,faulted pole can be identified by the calculated power accurately.The proposed scheme is insensitive to the sampling frequency and independent of distributed capacitive current.Meanwhile,the setting principle can be set in a simple and clear way.Theoretical analysis and comprehensive simulation experiments showed that it operates with high reliability and selectivity under different fault conditions with high fault resistance.In addition,its validity has been verified by real time digital simulator(RTDS) and field data test.关键词
高压直流输电线路/计算电阻/纵联保护/直流分量/故障附加状态Key words
High voltage direct current(HVDC) transmission line/calculated resistance/pilot protection/DC component/fault component network分类
信息技术与安全科学引用本文复制引用
杨亚宇,邰能灵,范春菊,刘剑..基于计算电阻的高压直流输电线路纵联保护[J].电工技术学报,2017,32(7):84-94,11.基金项目
国家自然科学基金(51377104,51177066,51407115)和中国博士后科学基金(2014M560333)资助项目. （51377104,51177066,51407115）
