几内亚苏阿皮蒂电站厂用电设计分析与推广应用

Design of the Auxiliary Power Supply System in Souapiti Hydropower Station of Guinea

苏阿皮蒂电站厂用电设计选型依据设计规范,从电源引接与数量、电压级数、接线方式与负荷分配等主要环节,结合电站规模、厂用负荷、短路电流大小、供电范围、配电变压器、负荷开关容量等具体参数,以及电网状况、机组主接线形式和运行方式等,通过技术数据分析论证,确定采用一级电压供电;由机端电与系统外来电、柴油发电相结合,互为备用,机组自用电与公共照明等分段、双层辐射的供电方案,使厂用电系统接线简明清晰,操作维护方便。

The design of the auxiliary power supply system in Souapiti Hydropower Station of Guinea is introduced.According to the relevant design codes,major issues including the connection and number of power sources,voltage levels,connection mode and load distribution are discussed.Then,according to the specific parameters of the station such as the station scale,auxiliary power load,short circuit current,power supply range,distribution transformer and load switching capacity,and other conditions such as the power grid status,main connection form and operation mode of the units,a first-level voltage supply mode is selected.In the designed auxiliary power supply system,the electric power from the unit end,the external power and the diesel generator power are integrated and work as mutual standby power sources.A subsection and bi-layer radiation mode is adopted for the unit service power and the public lighting power.The designed auxiliary power supply system is of certain advantages such as concise and clear wiring,and great operation and maintenance convenience.