Modeling And Simulation Study For The Marine Exhaust-gas Turbo-generator System

This thesis is mainly about the modeling and simulation study for the marine power station exhaust-gas turbo-generator system.At present, there are three dynamoelectric ways for marine power station: one of the dynamoelectric ways is of the independent heavy-oil diesel generator; another way is of the shaft-driven generator, and the other way is of the exhaust-gas turbo-generator. With the increase of the marine electrical equipments and the enhancement of the automation level, the electricity quantity increases correspondingly, especially for the large and middle scale container ships. Therefore, it must adequately attach importance to the production, transmission, consumption and the cost of the marine electrical energy. The use of the exhaust-gas turbo-generator intends to save the energy, by using the exhaust-gas from the host generator, recycling this part of energy, to reduce the electric power cost by maximum limit.Firstly this thesis analyzes the domestic and foreign tendencies and the present development situation of the marine power station simulator, and carries on a brief introduction for the computer simulation and the condition of software development and application. The marine power station is an independent electrical power system. Based on the study of the marine power station exhaust-gas turbo-generator simulation system in the DMS-2006 large-scale turbine simulator, synthesized the characteristic of other type marine power station exhaust-gas turbo-generators, this thesis firstly introduces the basic constitution and realization elements of the marine power station exhaust-gas turbo-generator. The goal is to know more about the turbo-generator in order for the better exhaust-gas turbo-generator modeling and controlling. The exhaust-gas turbo-generator can divide into two parts: one part is the turbine generator set, and the other part is the corresponding control system. Secondly this thesis establishes the mathematical model for the exhaust-gas turbo-generator system. The exhaust-gas turbo-generator system may divide into two major parts: one is the power set, namely steam turbine, generator and appurtenance; the other is the equipments of surveillance, protection, warning, operation and control the generator movement. Therefore, the power set mathematical model also divides into two kinds: One is the dynamic mathematical model, used to simulate the mathematical model of the steam turbine, the generator, the appurtenance and the system dynamic condition; the other is the logical and control mathematical model, used to simulate the mathematical model of the marine power station protection, warning, operation and control.Finally the thesis has realized the digital simulation of the exhaust-gas turbo-generator system. It has accomplished the exhaust-gas turbo-generator system's panel design by Visual C++ 6.0, and has carried on the system simulation by Matlab/Simulink. Analyzing the simulation result indicates: the established model is correct and the control performance is well done; and this model has an enhanced extension, high technical feasibility and the economical feasibility.