单项选择题
A.PMU B.AGC C.AVC D.SVG
A.30min B.40min C.1h D.2h
A.故障前10s到故障后60s B.故障前后30s C.故障前20s到故障后60s D.故障前后60s
A.分段式相间保护 B.低周切机 C.高周切机 D.距离保护
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