Study On Calculation Of Transition Process Of Long-loaded Hydropower Station

The transition process of the hydropower unit will occur frequently during the production operation of the power station.Due to the water hammer phenomenon during the transition process,the pressure along the pressure water pipeline,the rate of change of the unit speed and the water level of the surge tank will occur greatly.The fluctuations,therefore,the study of the transition process is the top priority for the safe and stable operation of hydropower stations.When the load of the power station changes greatly,especially when the whole load is abandoned,the power station will enter the large fluctuation process.In this process,the pressure value of the pipeline and the magnitude of the change of the unit speed are the focus of the transition process research.These two parameters The control changes in the fluctuation process of the power station show contradictions;which can reflect the safety performance of the actual operation of the power station,and can The control strategy of the power station is optimized through simulation results.Based on the scientific research results of the predecessors,this article has carried out the simulation calculation of the transient flow of the pressurized water pipeline,and established the mathematical model of the hydroelectric generating unit,the pressurized water pipeline and the impedance surge chamber.At the same time,using MATLAB programming program for software simulation calculation.Combined with the actual data of a power station in western China,the stability and safety of the power station under large and small fluctuations are verified,and optimization measures are proposed for its control strategy.