The Design of Main Electric Circuit for the Yebatan Hydropower Station

The Yebatan hydropower station consist of 6 hydraulic generators with total 2240 MW installed capacity. 4 sets of 510MW generators are connect with 4 main transformers. 2 sets of 200MW eco-unit generators and 2 main transformers are connected into joint units (for mutual backup). 4 large units and 2 eco-units are arranged in the same underground powerhouse. However their tailrace tunnels and outlets are arranged separately. The 500kV high voltage cables are arranged at both sides in an outgoing shaft with a height of 303m. The bottom and top of the shaft are connected by flat tunnels, and a traffic tunnel is set in the middle of the shaft. High slope anchor cable behind switch station is adopted to set up the output hanging point.