Research On Key Technology Of Turbine Modeling Visualization

With the development of information technology, the steam turbine is tending towards complexity and diversity, and its modeling visualization is becoming more and more important. At present, domestic level of turbine modeling visualization is lower, poor interoperability and strong dependence. Foreign software have better performance, but they also have the higher cost of the license, there are many different graphical symbols of the general components in the thermodynamic system and troubles to develop in next time. Therefore, it has a very important theoretical significance and practical value to research the key technology of turbine modeling visualization.Steam turbine feed water system is studied for the research. Referenced on the related research at home and abroad, the key technologies of the steam turbine model visualization: component characteristic parameter modeling, components & subsystems modeling, the system mathematical modeling and their visualizing are studied. The contents of this study and conclusions reached are as follows:Firstly, component characteristic parameter modeling has been researched. The feed water regenerative heating system and its key equipment have been analyzed in depth and their basic unit--component has been extracted, which is used to build the simulation system. Equipment component models in the feed water regenerative heating system have been established by object-oriented modeling technique and the thermodynamic system was formed by the equipment components. The association algorithm which meet the requirement of quick query has been researched in depth and the improved graph storage structure based on hash table is proposed.Secondly, the thermal system automatic layout algorithm based on improved force-directed model has been given. The theories of the traditional force-directed model is studied in detail, its disadvantage is analyzed and the force-directed model is improved. Super relaxation accelerated algorithm is introduced into force-directed model. It can accelerate its iterative convergence speed and improve layout speed in effect.Thirdly, the visualizing of component & subsystems mathematical model has been investigated systematically. Users could input and modify the mathematical model formulas online when the system parameters were configured. The condition of external event is checked in real time when the system is running; the model state would be changed when its condition was satisfied--the results of the model variables were calculated by using mathematical model formulas, and the corresponding model variables would synchronized after the end of each calculation step.Fourthly, the visualizing of the basic data and their calculated results on the steam turbine plant has been finished. General controls of modeling visualization have been designed and implemented, and they can provide a variety of visual effects which included the visualizing of the essential data, the visualizing of the calculated results and so on.Fifthly, the prototype system of the feed water regenerative heating system has been designed and developed. The whole platform is made up of follow subsystems:equipment component model, system model and the mathematical model visualizing. Based on Windows platform, the object-oriented software engineering method has been applied to the platform design and it is developed by using C# language.The simulation was tested by using the actual data of the feed water regenerative heating system in someone power plant. The result shows that the component characteristic parameter modeling and components & subsystems mathematical modeling are feasible. The built visualizing system has good versatility and flexibility. The researched results in this paper provide the necessary theoretical basis and key technology for the development of the Modeling Visualization products of steam turbine and have important theoretical significance and application value.