系统频率在48Hz至49.5Hz区间，每次频率低于49.5Hz时要求风电场具有至少运行（)min的能力。

A.电网频率低于48Hz，应根据风电场内风电机组允许运行的最低评论而定

B.电网频率48-49.5Hz，每次频率低于49.5时要求风电场至少能运行30min

C.电网频率49.5-50.2Hz，风电场必须连续运行

D.电网频率高于50.2Hz，每次高于50.2Hz，要求风电场至少能运行2min，并执行电网调度部门下达的高周切机策略，不允许停机状态的风电机组并网

A.10

B.20

C.30

D.40

A.5min

B.10min

C.15min

D.20min

A.2

B.3

C.5

D.10

A.低于48Hz

B.48Hz～49.5Hz

C.49.5Hz～50.2Hz

D.50.2Hz～50.5Hz

A.49.5Hz～50.2Hz

B.48Hz～49.5Hz

C.49.5Hz～50Hz

D.49Hz～52Hz

A.2min

B.1min

C.30s

D.20s

A.46.5Hz～49.5Hz

B.47Hz～49.5Hz

C.47.5Hz～49.5Hz

D.48Hz～49.5Hz