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As a comprehensive technology which is used for experimental research and training by means of models, simulation is characterized by security, economy, time-saving and repeatability. It has been widely used in aerospace, national defense, power, metallurgy, chemical industry, medical science agriculture and for systemic research and analysis, and for training.In order to ensure power system security, economic running, and make power agree with quality requirements, digital electro-hydraulic control system (DEH) has been widely used in turbo-generator unit at present, and become the most important part of power plant automation. Though the control logic of DEH is complicated, mastering the system operating characteristics and controller parameter tuning rules in advance by the power plant simulator research and testing, will greatly enhance the efficiency of debugging. If the DEH model is connected with the turbine, boiler, and electric model to form the real-time simulation model of the entire unit, it will be used as a power plant operator training platform. So the development of DEH system simulation model is of great significance.Based on further study of principles, characteristics and operation mode of turbine control system, this article uses the CyberSim graphical modeling simulation support software, taking the ShanXi Guanlv Yuncheng 200MW thermal power plant as a research specimen and developing the 200MW thermal power plant unit simulation models, and does simulation test based on it.This article has carried simulation test on the speed control, load control, valve test, and the overspeed protection control system. The simulating results show that the rapidity, accuracy, stability in controlling process of DEH control system model meets the field operation requirements, and provide important reference for field operation.
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