正序电压极化横差保护选择元件动作研究.pdfVIP

第 36 卷 第 8 期 继电器 Vol.36 No.8 2008 年 4 月 16 日 RELAY April 16, 2008 正序电压极化的横差保护选择元件的动作研究 1 2 3 1 鄢安河 ，李夏阳 ，姚晴林 ，张太升 （1. 河南电力调度通信中心，河南 郑州450052；2.重庆大学电气工程学院，重庆400044； 3.合肥工业大学，安徽 合肥 230009 ） 摘要：对两种极化电压下的横联差动电流方向保护的选择元件在同杆并架双回线故障下的动作行为进行了研究。通过理论分 析和仿真验证，指出相比于采用无关相相间电压极化的选择元件，采用正序电压极化的选择元件还具有其功率方向继电器的 测量角与故障点位置无关，也不随双侧电源的功角差 δ变化而变化的特点，从而指出采用该种方法使得横差保护具有更好的 动作性能。 关键词: 同杆双回线； 横差保护； 选择元件； 正序电压； 极化电压 Research on selectors of transverse differential protection using positive sequence polarizing voltage 1 2 3 1 YAN An-he , LI Xia-yang , YAO Qing-lin , ZHANG Tai-sheng (1.Henan Power Dispatch Communication Center, Zhengzhou 450052,China ； 2. Electric Engineering College,Chongqing University, Chongqing 400044,China ； 3. Hefei Industry University,Hefei 230009,China ） Abstract: This paper analyses selectors of transverse differential current direction protection using two types polarizing voltage for double circuit lines on the same tower. By using academic analysis and simulational validation, it points out that comparing with the selectors using interlinked tension of irrespective phase as polarizing voltage, the selector using positive voltage as polarizing voltage has some more virtues. The metrical angle of the power direction relay is independent of the location of fault, and it does not change along with the change of power declinate δ of bilateral sources .Thereby, it shows that the later scheme has better performance. Key words: double circuit lines on the same tower; transverse differential protection; s