基于线路电压降的双回线解列运行判据  

Break-Up Operation Criterion Based on Voltage Drop of Double-Circuit Lines

作　　者：索南加乐[1] 罗云照[1] 吴亚萍[1] 祖拉提[2] 

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]新疆大学

出　　处：《西安交通大学学报》2003年第2期119-122,共4页Journal of Xi'an Jiaotong University

摘　　要：通过对双回线非全相运行时同名相差电流的分析,提出了一种利用同名相电压降判别双回线解列运行的新方法.该方法考虑了零序电流和两回线长度不相等因素,能有效判别双回线非全相解列运行状态.仿真结果表明,该方法在双回线各种非全相并列运行状态下,修正后的差电流明显小于修正后的和电流,在各种解列运行状态下修正后的差电流大于修正后的和电流,不会发生误判.Analyzed the differential current in the same phase of doublecircuit line, a new criterion is proposed that identifies the breakup operation by comparing the voltage of the same phase. The facts, such as zerosequence current and two lines of different lengths, are taken into account, and the criterion can be adopted to identify the breakup operation state effectively. The result of EMTP simulation indicates that in a paratactic doublecircuit line the differential current adjusted in the same phase of doublecircuit line is less than the integral one, under nonfull phase operation state, once the doublcircuit line is broken up, the differential current adjusted in the same phase of doublecircuit line is more than the integral one. The technique ensures it against the erroneous judgment.

关 键 词：电压降 双回线解列运行 电力系统 继电保护 差动保护 零序电流 回线长度 

分 类 号：TM773[电气工程—电力系统及自动化]