南方电网技术2011，Vol.5Issue(2)：40-44,5.
双极高压直流输电线路行波差动保护原理及方案
Traveling Wave Theory and Differential Protection Scheme for Bioolar-Ooerating HVDC Transmission Lines
摘要
Abstract
Aiming at the insufficiencies of current protection program for the HVDC transmission system, this paper proposes a traveling-wave-based differential protection scheme for bipolar-operating HVDC transmission lines. Both the backward traveling waves (BTWs) of mode 1 at two terminals are employed to establish the discriminative criterion, in which the operating traveling wave is the differential of BTWs between two terminals while the sum of them is for the restraint wave. The currents of zero-mode at the rectifier terminal are utilized for faulty line detector in the bipolar-operating mode. Simulation results show that the proposed protection has the advantages of higher sensitivity, reliability and security, and its maximum fault resistance is up to 500 Ohm. The new protection works well in various fault conditions.关键词
高压直流输电线路/行波差动保护/保护方案Key words
HVDC transmission line/ traveling wave differential protection/ protection scheme分类
信息技术与安全科学引用本文复制引用
于洋,刘建,哈恒旭,蔡静..双极高压直流输电线路行波差动保护原理及方案[J].南方电网技术,2011,5(2):40-44,5.基金项目
国家自然科学基金资助项目(50707002). （50707002）
