多项选择题

某地区电网计划新建一座220kV变电站，安装3台180MVA、220/110/10kV主变压器，变压器高、中、低压侧的容量分别为额定容量的100%、100%、30%。下列哪些措施可限制变电站10kV母线侧短路电流？（ ）

A.将主变压器低压侧容量改为50%
B.提高变压器的阻抗值
C.变压器220、110侧中性点不接地
D.10kV母线分段运行
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It can be inferred from the passage that ______.A.John and Paul were more talented and made greater contribution to the success of the bandB.John and Paul sang their own songs because they didn't like each other's styleC.George and Ringo never composed or sang their own songsD.The Beatles maintained so much popularity with their works that no other recording or writing group could compare
A.A.John
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单项选择题
某500kV线路导线采用4分裂630 45钢芯铝绞线，其单位重量为2.06kg m，在设计杆塔时，计算得出大风工况（t＝5℃，v＝24m s，b＝0mm）下导线的风偏角为38°，请问，跳线的风偏角为多少度？（ ）
A.38°
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C.52°
D.58°
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