Daguangba Water Conservancy and Hydropower Project Daguangba Phase I Water Conservancy and Hydropower Project

The dam of Daguangba Reservoir controls the catchment area of 3,498 square kilometers, with annual average rainfall of 1.565 mm, annual average inflow of 3.06 billion cubic meters and annual average flow of 97 cubic meters per second. The main dam is a concrete gravity dam, located on the riverbed 50 meters downstream of the original low dam of Xiaoguangba Power Station, and the auxiliary dam is a homogeneous earth dam. The elevation of dam crest is144.0m; The maximum dam height of the main dam is 57.0m, and that of the auxiliary dam is 44.0m: the crest length of the main dam is 719.0m, and that of the auxiliary dam is 5123.0m. The check flood level of the reservoir is 14 1.97m, and the corresponding storage capacity is/kloc-. Design flood level 140.07m, corresponding to storage capacity15.02 million cubic meters; Normal water level 140.0m, corresponding to storage capacity14.95 million cubic meters; Dead water level 1 16.0m, corresponding to storage capacity1.800 million cubic meters.

Daguangba Hydropower Station has a designed installed capacity of 60,000 kilowatts ×4, with a designed maximum head of 87.0 meters, a minimum head of 62.9 meters and a single machine flow of 92.9 cubic meters per second. The designed annual power generation capacity is 520 million kWh. The workshop is the underground workshop behind the dam. Size of main workshop: 87×14× 37.5m (length× width× height). There is also a small hydropower station of 1000 kW ×2 at the head of the main canal.

The project construction adopts the project legal person responsibility system, with the provincial electric power company as the project owner, and the owner has an engineering headquarters at the construction site, with Lin Hui as the second in command. After public bidding, the hub project was designed by Zhongnan Hydropower Survey and Design Institute, constructed by China Gezhouba Construction Engineering Bureau, and supervised by Guangxi Water Resources and Hydropower Survey and Design Institute. It was approved by the state in June 1990, and all four units were put into production in March 1995.

At the same time as the hub project, there is also the irrigation system project of the high trunk canal, and the total investment of the reservoir inundation compensation and resettlement project reaches 370.56 million yuan. The governments of Dongfang and Ledong counties set up engineering resettlement offices respectively to organize specific work.

After the completion of Daguangba Power Station, the original Xiaoguangba and Dongfang Power Station ceased to be used. Xiaoguangba Hydropower Station was organized by Hainan Water and Electricity Bureau, 1972 to 1975, and Deputy Director Jiang Chengdai personally directed the construction. The design head of the power station is 4 1.2m, the flow rate is 28.2m3/s, the installed capacity is 6500×2kW, the model of hydraulic turbine is HL 702-LJ ~ 140, and the hydrogenerator is TS 330/6 1 ~ 16. The third harmonic excitation device is adopted.