距离I段的保护范围是否受系统运行方式变化的影响 -题库考试答案搜索网

距离I段的保护范围是否受系统运行方式变化的影响

单选题

2021-09-01 20:45

A、有一些影响，因为测量阻抗Zj= Uj /Ij ,当运行方式变化时，短路电流要变化，Ij也要变化
B、有一些影响，因为运行方式变化后，短路时Uj 、Ij均将发生不同的变化
C、无影响，无论运行方式如何变化，Uj 、Ij 变化的比例是相同的
D、说不清楚

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正确答案

C

试题解析

标签：联大河南理工大学电气工程及其自动化微机继电保护

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