Basic data of Xin 'anjiang Hydropower Station

Construction site: Jiande

Control basin area: 10480 km2.

Average flow for many years: 357 cubic meters per second.

Normal water level/dead water level: 108/86m.

Total storage capacity/regulated storage capacity: 216.26/654.38+0.0266 billion cubic meters.

Adjusting performance: multi-year adjustment

Installed capacity: 855,000 kilowatts

Number of units: 9 units

Guaranteed output:178,000 kw

Annual power generation: 18.6438+0 billion kwh.

Maximum head/minimum head: 84.3/57.8m.

Design head: 73m.

Turbine model: HL 662-LJ-410HL009-LJ-410.

Other benefits: flood control and irrigation.

Submerged cultivated land: 332,200 mu

Migrated population/estimated year: 295,800.

Dam type: concrete gravity dam; Grooved gravity dam

Maximum dam height:105m.

Earth excavation and filling: 585.8/ 10,000 meters.

Total amount of concrete:1755,000 cubic meters

Cement: 347,400 tons

Steel: 36 150 tons

Wood: 135500m3

Static total investment/level year: 4.863/ year

Investment per kilowatt: 499. 12 yuan.

Dam foundation rock: sandstone

Construction: started in 57.4 years and generated electricity in 60.4 years. The dam site foundation built in 1977 is Devonian sandstone and Lower Carboniferous sandstone, with developed faults and fractures. The crest elevation of the dam is105m, and the crest length is 465.4m. ..

The workshop is of overflow type at the dam top. The top of the factory building is connected with the barrage, and the lower part of the factory building is separated from the barrage by a vertical seam. The total length of the workshop is 216438+0m. The auxiliary powerhouse is arranged between the dam and the main powerhouse. 220KV switching stations are all arranged on the hillside on the right bank downstream of the dam. The ship lift is located on the left bank. Once it is completed, the construction of the ship lift entrance gate will be stopped. There are 9 vertical shaft Francis turbine generator sets installed in the workshop, with a single capacity of 95MW. 1 single machine capacity 90MW. The runner diameters of hydraulic turbines are all 4. 1m, and the rated speed is 150r/min. The rated voltage of generators is 13.8KV, all of which are suspended air-cooled type.

The spillway is located at the top of the powerhouse behind the riverbed dam of the barrage, with 9 surface holes, width 13m and height10.5m. The gate is a plane fixed wheel rigid gate. The elevation of the dam crest is 99m, and the maximum discharge is13200m3/s. The discharged high-speed water flows into the river through the top of the powerhouse. Xin 'anjiang Hydropower Station is located on Xin 'anjiang River in the upper reaches of Qiantang River in Zhejiang Province, China, with a distance of Hangzhou 170km. It is a concrete gravity dam with a maximum dam height of 105m and a total storage capacity of 22 billion cubic meters. The total installed capacity is 855,000 kW, and the annual power generation is 65.438+0.86 billion kW·h, which was started in April, with an annual power generation of 654.38+0.957. 1the first power generation unit was put into operation in April, 1960, 19781October. The reservoir has many years of regulation performance, and the power station mainly undertakes peak regulation, frequency modulation and emergency standby of East China Power Grid, which has comprehensive benefits such as flood control, irrigation, shipping, aquaculture, tourism, water sports, forestry and fruit industry.

The dam site is located in the upper section of Tongguan Gorge, and the drainage area above the dam site is 10480 square kilometers, with an average annual flow of 357 cubic meters per second and annual runoff of11300 million cubic meters. The rock formations at the dam site are Devonian sandstone and Lower Carboniferous sandstone. Small faults and structural joints in dam foundation are well developed. There are 16 small faults in the whole dam foundation. After excavation, the exposed fault width of foundation pit is generally less than 30cm, and the fault dip angle is steep, ranging from 40 to 60. The joints on the left and right bank slopes are dense, the rock mass cutting is mainly fault structure, and the riverbed section is mainly block structure.

The normal water level of the reservoir is 108m, corresponding to the total storage capacity178.4 billion cubic meters, and the dead water level is 86m, corresponding to the storage capacity of 7.574 billion cubic meters. The annual storage capacity is 3.45 billion cubic meters, and the storage capacity is 4.282 billion cubic meters between the flood control limited water level 106.5m and the highest water level 1 14m. The reservoir flooded 2 1 10,000 hectares, and about 290,000 people migrated. 1950 to 1992, the average measured rainfall 1669.2mm, and the average measured runoff for many years10/0/800,000 cubic meters. Except for 1966 trial flood discharge and 1983 flood discharge, the actual flood control storage capacity is more than 950 million cubic meters because the water level in front of the dam is lower than the flood limit level in flood season, which is basically full of incoming water.

When the reservoir water level reaches or exceeds 106.5m, it will continue to rain in the basin, and it is predicted that the reservoir water level will continue to rise. Led by Zhejiang Flood Control and Drought Relief Headquarters, the relevant personnel of Hangzhou Flood Control and Drought Relief Headquarters, jiande city Flood Control and Drought Relief Headquarters, Xin 'anjiang Power Plant and East China Electric Power Administration are convened to form a flood control coordination group, which analyzes the rainfall, water regime, disaster situation and flood control dispatching principles of the upstream and downstream, and puts forward flood dispatching suggestions, which will be implemented by Xin 'anjiang Power Plant after being examined and approved by the provincial flood control and drought relief headquarters.

Since the completion of the hydropower station, in order to ensure the safety of upstream and downstream, * * * has carried out seven times of flood discharge, including trial flood discharge 1 time.

1.Start on June 28th, 1983, and stop on July 3rd. On July 5th, the floodgate was opened again, and the floodwater was stopped on June 5th.

2. The flood discharge started in June 1994 and lasted 123 hours.

3.1June 25th, 995, lasting 135 hours.

4.1July 3, 996, lasting 48 hours; On July 1 1 day, the floodgate was opened again 139 hours.

5.1June 29th, 999, 8 holes were discharged, which lasted 163 hours.

Six, 2011June 2 1 day, 3 holes flood discharge, flood discharge time is 33 hours.