题目内容

500kV变电站站用变压器电源如何配置()。

A. 500kV变电站的主变压器为两台(组)及以上时,由主变压器低压侧引接的站用工作变压器应为两台,并应装设一台从站外可靠电源引接的专用备用变压器,该电源宜采用专线引接
B. 每台工作变压器的容量至少考虑两台(组)主变压器的冷却用电负荷
C. 专用备用变压器的容量应与最大的工作变压器容量相同
D. 初期只有一台(组)主变压器时,除由站内引接一台站用变压器外,应再设一台由站外可靠电源引接的站用变压器,该电源宜采用专线引接

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