电厂热力系统的长期动态特性模型

热力系统的长期动态特性对各种火电机组的仿真或控制系统设计具有十分重要的意义。通过合理的机理分析和简化，从整体高度建立起热力系统的长期动态过程的数学模型，这一整体动态模型能较为合理地反映出长期动态过程中热力系统的蓄热与做功规律，弥补了现有火电机组动态模型的不足，更好地满足了机组长期动态特性分析与负荷控制策略研究的需要。最后以此为工具对某600MW超临界机组的长期动态特性进行了仿真研究，仿真结果合理正确。

Long-term Dynamic Characteristics Model of a Power Plant Thermodynamic System

The long-term dynamic characteristics of a thermodynamic system are of major significance to the design of simulation or control systems for various types of thermal power plants. Through a rational analysis and simplification of relevant mechanism a mathematical model of long-term dynamic processes has been set up for a thermodynamic system from an integral standpoint. Such an integral dynamic model can fairly rationally reflect the heat accumulation and work-performing law of the thermodynamic system in a long-term dynamic process. As a result, the above model can remedy the deficiency of the dynamic model of present-day thermal power plants and better meet the requirements for analyzing plant long-term dynamic characteristics and studying plant load control strategy. With the model serving as a tool a simulation study was conducted of the long-term dynamic characteristics of a 600 MW supercritical power plant. The simulation results have been found to be rational and accurate.