电工技术学报2016，Vol.31Issue(21)：21-29,9.
同杆并架线路阻抗比横联差动保护研究
Transverse Differential Protection Based on the Ratio of Impedance for Double Circuit Lines on the Same Tower
摘要
Abstract
Traditional current transverse differential protection has low sensitivity and long successive operating zone. So it has shortages when applied to the high-voltage and electrical parameters asymmetry power systems. A new transverse differential protection based on the ratio of measurement impedance, i. e. the sum of measurement impedance to the difference between the measurement impedance, is proposed. The proposed scheme is unaffected by system impedance to a large extent, and has a short successive operation zone. The paper analyzes the reason for this and completes simulation research. Theoretical analysis and PSCAD/EMTDC simulation show that, compared with traditional current transverse differential protection, the ratio of measurement impedance can decrease the successive operating zone obviously. The proposed integrated protection scheme is simple, rapid, reliable, and easy to realize.关键词
同杆并架/参数不对称线路/阻抗比横差/故障选线/相继动作区Key words
Double circuit lines on the same tower/electrical parameters asymmetry line/the ratio of impedance transverse differential/fault line selection/successive operating zone分类
信息技术与安全科学引用本文复制引用
李世龙,陈卫,邹耀,尹项根,陈德树..同杆并架线路阻抗比横联差动保护研究[J].电工技术学报,2016,31(21):21-29,9.基金项目
国家自然科学基金项目资助(51277085)。 （51277085）
