输电线路纵联差动保护稳态情况下的不平衡电流产生的原因是（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69518' and id < 4503723 and id<>'4503723' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69518' and id > 4503723 and id<>'4503723' order by id asc limit 5