Ertan Dam

Coordinates: 26°49′15″N 101°46′52″E / 26.82083°N 101.78111°E / 26.82083; 101.78111
Source: Wikipedia, the free encyclopedia.
Flood discharge of Ertan
Ertan Dam
TWh

The Ertan Dam (

southwest China
.

The dam has six

TWh, and until December 5, 2006, it has produced over 100 TWh of electricity. Construction of the dam started on September 1991 and was completed on December 26, 1999.[1][2]
A total of 12,638,000 m3 (446,306,758 cu ft) of material was excavated during construction.

The Ertan Dam was designed by the China Hydropower Engineering Consulting Group Survey and Design Institute in Chengdu, and was constructed and is currently operated by Ertan Hydropower Development Company Limited, the owners of the dam. The company is invested by State Development and Investment Company (52% share) and Sichuan Chuantou Energy Limited (48% share).

General layout of Ertan hydroelectric scheme[3]

Design

The Ertan Dam is a 240 m (787 ft) high and 774.7 m (2,542 ft) long double-curvature arch dam. The dam withholds a normal reservoir of 5,800,000,000 m3 (4,702,137 acre⋅ft) with a drainage area of 116,400 km2 (44,942 sq mi) and normal surface area of 101 km2 (39 sq mi). The dam has four different ways to discharge water downstream. First, the dam's

bottom outlets that can discharge 6,930 m3/s (244,731 cu ft/s) and 2,084 m3/s (73,596 cu ft/s) respectively. The dam's power station is located underground along with its transformer room which is in a separate cavern. Additionally, the power station is supported by an underground surge chamber as well.[3]

Main Features

Source:[3]

Project Location On the Yalong River, Sichuan province,

P. R. China

Project Purpose Hydroelectric Power Generation
Years of Construction 1987-1999
Construction of Main Dam
Type Double-curvature Arch Dam
Height 240 m
Crest Length 774.69 m
Construction of Power plant
Maximum gross head 189 m
Installed Capacity 6×550 MW (Francis)
Power Conduits 6 steel embedded in concrete

I.D.=9.0 m

Catchment and Reservoir
Catchment Area 116,400 km2
Mean Annual Runoff 1,670 m3/s
Reservoir Area at FSL 101 km2
Storage at FSL 5,800 million m3
Active Storage 3,370 million m3
Discharge Capacity
Crest Outlet 7 / 6,260 m3/s
Mid Level Outlet 6 / 6,930 m3/s
Bottom Outlet 4 / 2,084 m3/s
Flood Discharging 2 / 7,400 m3/s
Project Developers
Owner Ertan Hydropower Development

Company, Ltd.

Designer CHIDI,

now POWERCHINA Chengdu

Contractor EJV, SGEJV, GYBD
Main Equipment Suppliers
Turbines

Machinery Co, Ltd., Harbin Electric

Machinery Co, Ltd.

Generators & HV

Electrical

GE Canada, Dongfang Electrical

Machinery Co, Ltd., Harbin Electric

Machinery Co, Ltd.

Gates &

Hydromechanical

Jiajiang Hydraulic Machinery Works,

China Gezhouba (Group) Corporation,

Sinohydro Bureau No.8,

See also

References

  1. ^ Ertan Hydroelectric Dam
  2. ^ "我国西部的最大水电站二滩水电站全面建成投产". Archived from the original on 2011-05-07. Retrieved 2008-02-09.
  3. ^ a b c "Ertan Hydropower Project" (PDF). Chinese National Committee on Large Dams. Retrieved 8 January 2011.