A.電壓相位相反 B.發(fā)電機組向電網(wǎng)輸出功率 C.發(fā)電機組從電網(wǎng)吸收功率 D.勵磁電流相位相反
A.3%~20%額定功率;3~5s B.8%~15%額定功率;3~10s C.5%~15%額定功率;1~5s D.5%~25%額定功率;1~3s
A.把有故障發(fā)電機從電網(wǎng)切除 B.電網(wǎng)立即跳閘 C.自動起動備用機組 D.分級卸載