桥巩水电站施工用电存在问题的处理措施

桥巩水电站施工变电站主结线为单电源、单母线不分段、重要负荷单回路供电.该主结线供电可靠性低,为了确保施工用电安全,不但将另外2回供电线路延伸至基坑,同时购置2台200 kW柴油发电机组做抽排水的保安电力,并将10 kV电网引入至施工变电站10 kV母线作为备用电源.上述措施弥补了主结线的不足,有效地确保了施工用电安全.由此可见, 大型水电工程施工用电需要有两个电源供电,变电站的母线如果采用单母线,则要分段,并从不同分段各架设一回线路对重要负荷供电,方能保证工程施工用电安全.

Measures against Problems in Power Supply for Construction of Qiaogong Hydropower Station

The main connection of the construction substation at Qiaogong Hydropower Station supplies power under low credibility with single supply,non-sectional single bus bar and single circuit bearing important load.In order to ensure a safe power supply for construction,another two supply lines are extended to the foundation pit,two 200kW diesel generating sets are purchased to supply power through pumping and drainage,and 10kV power grid is led to 10kV bus bar of the construction substation to serve as standby p...