Digital Simulation Research On Dynamic Process Of Pumped Storage Power Station

With the increasing demand of the society for electric energy,the hydropower industry has achieved long-term development.At the present stage,the development of pumped storage power stations has been intensified.At the same time,there is an increasing demand for transition process simulation techniques used in the design and operation management phases of pumped storage power stations.Using the simulation technology can provide guidance to the design of pumped storage power station,it can reduce the construction of pumped storage power plant cost and short the construction cycle;it can provide more reasonable for the operation of the pumped-storage power station production control rule and make the utilization of resources to further improve and ensure the economy,security and stability of pumped storage power station.In this paper,the mathematical model of each component of pumped storage power station is built by combined with the calculation theory of hydraulic transition process.The comprehensive characteristic curve of reversible turbine external characteristic model is extended and interpolated.The improved Suter transformation method is used to solve the flow and torque multivalued problems in the calculation of the reversible turbine comprehensive characteristic curve.The method of characteristics is used to calculate the flow state of pipeline system at different time.Digital simulation software for the dynamic process of pumped storage power station based on Windows platform was developed.Digital simulation of the dynamic process of pumped storage power station is realized.The simulation software for the dynamic process of a pumped storage power station is used to simulate the start-up to no-load,load rejection to no-load,primary frequency modulation,pumping start and accident power off conditions of a pumped storage power station.The digital simulation calculation process of the pumped storage power station dynamic process is realized,and the correctness and feasibility of the simulation software design scheme are verified.The software is simple,efficient and reliable,and has practical value and application prospect.