The Program Design For Analysis And Calculation Of Electromagnetic State Parameters Of The Hydro-generator Based On The Finite Element Method

For the hydroelectric power enterprises,the mastering condition of the hydro-generator electromagnetic state parameters,have important influence on the unit and the power grid routine operation,scheduling,protection,repair and maintenance.Especially the mastering degree of the grid connecting power quality paremeter,the reactance paremeter of generator,and the electromagnetic loss parameters,not play the decisive role on the security and stability of units and grid,but also have important influence on the enterprise competition ability.So far,however,for the most of the hydroelectric power enterprises,due to the lack of accurate and reliable electromagnetic analysis software,in the design and order stage,or fault analysis stage,the accurate electromagnetic state parameters are difficult to be obtained.This will lead to hydropower enterprises difficult to give substantive suggestions to the technical scheme of the generator design and manufacture enterprises.In order to overcome the above defects,in this thesis,a set of finite element analysis software of electromagnetic state parameters of hydro generator is developed by carrying out the following research work.? Base on the electromagnetic field theory and the circuit theory,some important factor are considered,such as the electromagnetic field time-varying,the ferromagnetic material saturation,rotor moving,damper bar eddy currents,the 2D hydro-generator boundary value problem equations and circuit equations are built,then the 2D field-circuits coupling model of hydro-generator is built.And in addition,the delaunay triangulation algorithm of mesh generation and the solution algorithm of linear and nonlinear finite element equations are discussed.?The main demands of software design are analyzed from 4 important aspects,such as the business requirements,the user needs,the functional requirements,and the non functional requirements.and then according to the finite element pre-processing,the the finite element equations solving,and the finite element post-processing,some key function modules are designed,including mesh,material definition,equation iteration and output.And the finite element analysis of hydro-generator electromagnetic parameters are implemented.?The analysis and calculation function of this software are validated by diagrams,figures,test,and physics laws.The test results show that the software can analyze and comput hydro-generator electromagnetic parameters accurately and reasonably,and it canprovides valuable reference for the operation and maintenance of hydro-genertor.The research work of this thesis provides an accurate and practical finite element analysis software for the electromagnetic state analysis of the hydro generator,and it has a certain academic and engineering reference value.