Sanmenxia hydropower station immigrants daquan

1. The Three Gorges Project is located in the middle of Xiling Gorge, one of the Three Gorges of the Yangtze River, and the dam site is located in Sandouping, Yichang City, a sub-provincial central city in Hubei Province. The building of the Three Gorges Project consists of three parts: the dam, the hydropower station and the navigation structure. The dam is a concrete gravity dam with a total crest length of 3035m and a dam height of185m. The designed normal water level in dry season is l75m (65438m in wet season). The total storage capacity is 39.3 billion cubic meters, of which the flood control storage capacity is 2210.50 billion cubic meters. On the left bank of the hydropower station 14 units, on the right bank 12 units, and 26 hydro-generator sets. The turbine is mixed flow, with a single unit capacity of 700,000 kilowatts, a total installed capacity of 654.38+082,000 kilowatts, and an average annual power generation of 847.

2. Sanmenxia Water Control Project is the first large-scale water control project built on the main stream of the Yellow River. Located in the middle and lower reaches of the Yellow River, at the junction of Sanmenxia City in Henan Province and Pinglu County in Shanxi Province. It has comprehensive utilization benefits such as power generation, flood control, anti-icing and irrigation. The original designed normal water level is 360m, and the installed capacity of the power station is 1 160Mw. The average annual power generation for many years is 6 billion kw·h, and the dam is a concrete gravity dam. The maximum dam height is106m. The project started construction on 1957, with a normal water level of 350 meters. The corresponding initial total storage capacity is 35.4 billion cubic meters. 1960 reservoir impoundment, 1962 commissioning and power generation of the first unit. After the reservoir is impounded, the riverbed at the tail of the reservoir rises due to sediment deposition. The power station stopped running immediately. In order to slow down siltation, maintain the regulated storage capacity, and give full play to the reservoir's flood control, ice prevention and irrigation efficiency, two reconstructions were carried out from 1964 to 198 1. For the first time, two flood discharge and sediment discharge tunnels were added, and 4 units from No.5 to No.8 were converted into flood discharge pipes. The second time, it was reopened. It was transformed into a bottom hole for flood discharge and sediment discharge, 1 ~ 5 unit inlet elevation was reduced 13m, and the diversion steel pipe was transformed accordingly, realizing the application principle of "storing clear water, discharging muddy water and regulating sediment". After the transformation, the installed capacity of the power station is reduced to 250Mw, the annual power generation is1.200 million kW·h, the highest water level is 340 m m, and the sediment erosion is serious. 1985 Phase II Reconstruction/No.8 bottom outlets of kloc-0/and No.9 and 1 0 construction diversion bottom outlets were opened for reconstruction to expand the discharge capacity of the hub. Now, in order to further improve the power generation efficiency and restore the original units 6 and 7, two Francis hydrogenerators with a single unit capacity of 75Mw are being reinstalled to increase the installed capacity of the hydropower station.