Key Technical Analysis of Renovation of Francis Turbine at Lijiaxia Hydropower Station
With the large-scale development of wind power generation and photovoltaic power generation,the propor-tion of new energy in the new power system has gradually increased,and hydropower units have been started quickly and adjusted flexibly,so the characteristics of conventional hydropower stations participating in power grid energy regulation have become more prominent.In order to meet the demand of multi-energy complementation in the new power system,the stable operation of the hydropower unit with wide load range has become an urgent need for the safe operation of the current power grid.Taking the#3 water turbine of Lijiaxia Hydropower Station as the research object,this paper puts forward the design concept of turbine transformation,expounds the key points of turbine transformation under the re-quirement of multi-energy complementary system,which provide guidance for the technical transformation of water tur-bine.The experimental and operation data after the runner optimization show that the extreme value of pressure pulsation of the top cover under partial load condition has been reduced by 77.6%,and the amplitude of vibration of the top cover has also been significantly reduced,indicating that the stability of the turbine under partial load has been significantly im-proved.At the same time,the optimized hydro turbine successfully realized stable and economic operation within the full load range of(0～100%)Pr,which meets the energy modulation requirements of the new power system for hydropower,and can provide reference for the transformation design of similar hydropower stations in the future.
万方数据
维普
