Research And Development Of A Simulation Environment For Thermal Power System

In order to utilize energy sources efficiently and reasonally with low pollution, the thermal power system of power plant is developing towards the trend of complication, greatness, diversification. While studying the new big thermal power system, such as combined-cycle system, developing new products and implementing engineering project, traditional methods are facing new challenge for their failure to meet higher request in quality and time. With the rapid development science and technology, it is possible to make a simulated analysis and optimized design by the means of computer. Consequently, it is imperative to make out an advanced method applied in analysing thermal power system, especially to develop integrated advanced commercial simulation software with its own property right.On the basis of extensive research on the modeling and simulation of the thermal power system in power station abroad and domestic, this dissertation makes a deep analysis in graphic modeling system and simulation environment. The following tasks are complished with the aid of current computer thchnology and system simulation technology. They are: ①An overall plan of establishing simulation environment in thermal power system is proposed. The basic idea of this plan is to establish a comprehensive (multi-funtional) software platform for engineering analysis and developing simulation test instruments. Designing the platform that utilizes classified model database, visualization technology, distributed caculation method and artificial intelligence technology, which guarantees its flexibility, promptness, and popularity.②Two concepts of s-type module are put forward, which are applied in graphic modeling so that the advantage of taking equipments as independent module is kept. Meanwhile, simulation computation is speeden and model adaptability is expanden by the utilization of algebra equation.③A good enviornment of programme debugging and simulation running is set up. Users can construct programme debugging and simulation running environment by configuration, moreever, they can select on-line information models such as data, graph, table and system diagram, which enables researchers to implement simulation activities quickly. In terms of programe debugging environment, the debugging method of input parameters and static parameters are used on the basis of input parameters and auto-parameters results. All the functions of programe debugging can be realized on one high performance computer or on LAN. The simulation model can be debugging many reserchers, individually or collectively. Practical application shows the flexibility and swiftness of this debugging environment.④After analysing the operation characteristics and fualts analysis of power station, operation guide system comes into being on the basis of knowledge database by combining traditional expert system and artificial neural network. The system can provide an intelligent Tutoring System for training simulators, and can also provide suitable practical help for operation guide system.⑤Based on the distribution features of thermal power system and the coupling features between the two equipments or subsystems, the distributed study work are underwent, which lays a fundation for establishing real time computation model with high precision.⑥The modules of important thermal power system equipments such as steam turbine, evaporator, steam-water separator and pipe are developed. System testing and application works are also completed.