tailieunhanh - Yeywa Hydropower Project, an Overview

Dự án thủy điện 790 MW Yeywa nằm trên sông Myitinge (thấp hơn tầm với của Nam Tu Sông), khoảng 50 km về phía đông nam Mandalay ở miền trung Myanmar. Dự án bao gồm chủ yếu của một cao 134m đầm lăn đập bê tông (RCCD) với một trạm điện 790 MW nằm trên bờ trái dưới chân đập và đập tràn ungated nằm ở phần trung tâm của đập nước lũ thải. Hai bê tông lót đường hầm dẫn dòng sông nằm trong ngân hàng bên phải, một trong số này là sau đó chuyển đổi thành một cửa hàng phía dưới cho. | The Website of the Vietnam National Commission On Large Dams Yeywa Hydropower Project SEfH an Overview Y 2006 U. Win Kyaw U. Myint Zaw Alan Dredge Paul Fischer K. Steiger Department of Hydropower Ministry of Electric Power Myanmar Colenco Power Engineering Ltd CH Introduction The 790 MW Yeywa Hydropower Project is located on the Myitinge River lower reach of Nam Tu River approximately 50 km southeast of Mandalay in central Myanmar. The project comprises principally of a 134m high roller compacted concrete dam RCCD with a 790 MW power station located on the left bank at the foot of the dam and an ungated spillway located in the central section of the dam for flood water discharges. Two concrete lined river diversion tunnels are located in the right bank one of these being subsequently converted into a bottom outlet enabling reservoir drawdown and control on reservoir filling maintaining of riparian flows to the river downstream during the impounding period and in the emergency case of all turbines being closed down. Project Location Map Project General Layout The Website of the Vietnam National Commission On Large Dams The power generation facilities comprise of 4 power intakes 4 steel penstocks and 4 vertical axis Francis turbine and generator units and associated electro-mechanical and auxiliary equipment installed in the open air powerhouse. Two double circuit 230 kV transmission lines connect between the main transformers located on the downstream side of the powerhouse to an open-air switchyard located on the left bank 550m downstream of the powerhouse and then some 40 km to Kyaukse Substation in the west just south of Mandalay and some 110 km to Meiktila Substation in the southwest. Key parameters include Storage Reservoir x 109 m3 Gross Active Storage Full Supply Level . Minimum Operating Level . RCC Dam 134m max height crest length 690 m Diversion Tunnels 2 x 10m dia lengths approx 450m 500m .