某地区新建2台1000MW超超临界火力发电机组,以500kV接入电网,每台机组设一组动力用220V蓄电池,均无端电池,采用单母线接线,两台机组的220V母...

作者: rantiku 人气: - 评论: 0
问题 某地区新建2台1000MW超超临界火力发电机组,以500kV接入电网,每台机组设一组动力用220V蓄电池,均无端电池,采用单母线接线,两台机组的220V母线之间设联络电器,单体电池的浮充电压为2.23V,均充电压为2.33V,该工程每台机组220V直流负荷如下表,电动机的启动电流倍数为2.
选项 220V蓄电池的个数应选择 (A)109个 (B)104个 (C)100个 (D)114个
答案 B
解析 依据DL/T5044-2004之附录B.1,蓄电池个数:n=1.05*220/2.23=104个均充电压Uc=1.125*220/104=2.37≥2.33,B满足

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