The Technology From HIT behind the Baihetan Hydropower Station


All Media Center--- Recently, the first batch of generating units at the Baihetan Hydropower Station in the Jinsha River went into operation on time and safely. Xi Jinping, General Secretary of the CPC Central Committee, President of the People's Republic of China and Chairman of the Central Military Commission, sent a letter to congratulate the first batch of generating units at the Baihetan Hydropower Station in the Jinsha River on going into operation. Xi Jinping pointed out in his congratulatory letter that the Baihetan Hydropower Station is a major national project implementing the "West-East Power Transmission", and is the world's largest under construction, and the most technically difficult hydropower project. It has the hydroelectric generating units with the world's largest single-machine capacity of one million kilowatts, which is a major breakthrough in China's high-end equipment manufacturing.


On June 28, 2021, the builders attended the ceremony of putting the first batch of generating units of the Baihetan Hydropower Station into operation at the underground plant on the left bank of the Baihetan Hydropower Station. Photo by Xinhua News Agency Reporter Liu Mengqi


This is the Baihetan Hydropower Station on June 10 (Drone Photo). Photo by Xinhua News Agency Reporter Xu Bingjie

Professor Wang Hongjie from the School of Energy of HIT, led a team including Associate Professor Li Deyou, Senior Engineer Gong Ruzhi and Associate Professor Han Lei to develop a high-precision numerical simulation method and carry out the flow mechanism analysis of the hydraulic turbine, the ventilation cooling system and the cooling structure of the generator thrust bearing and structural optimization design, relying on the national scientific and technological support sub-projects "Research on the Interstitial Flow-induced Vibration and Transition Process Stability of the 1000MW Hydraulic Turbine", "Research on Ventilation and Cooling Technology of the 1000MW Generating Unit" and "Analysis of Oil Flow Field in Oil Groove of Thrust Bearing of the Large Hydroelectric Generator".

The team studied the stability of the turbine based on hydraulic calculations and rotor dynamics analysis. They proposed the design criteria for the stability of the turbine rotor sealing system, so that the turbine can avoid unstable areas when the turbine is running, and optimized the ventilation effect of the ventilation trench structure of the generator set,realizing the optimization of the cooling system structure. The simulation experiment was carried out with the thrust bearing test model of the hydro-generator, which revealed the internal flow mechanism of different forms of thrust bearings, and determined the safe and reliable thrust bearing cooling technology for 1000MW units. The above research achievements have provided theoretical support and analysis methods for the design of the giant hydropower unit at Baihetan, and made important contributions to the safe and stable operation of the giant hydropower unit at Baihetan.


Overall structure of the rotor     Thrust bearing model of the drawer cooler


Francis turbine model   Draft tube vortex zone under different working conditions

Professor Wang Hongjie’s team has long been engaged in the research on the flow mechanism and optimization of hydraulic machinery, and has been selected as the key field innovation team of the Ministry of Science and Technology Innovation Talent Promotion Plan and Heilongjiang Provincial Talent Team (high-end product development team for hydropower equipment). Their research results have helped Harbin Electric to successfully apply the independently developed and designed water turbines and pump water turbines to more than 10 power stations including Liyang. The team has won such rewards as the first prize of Heilongjiang Province Natural Science in 2020 and the second prize of Innovation and Promotion Award of China Industry-University-Research Cooperation Promotion Association in 2020.