Modeling And Application Analysis For Regenerative System Of Coal-fired Power Plant Based On Multi-Domain Unified Modeling Language

Regenerative system of coal-fired power plant is the core of the whole plant thermal system, which plays a significant impact on the safety and economy of the entire power plant. Establish a reusable and scalable simulation software package of regenerative system which is easy to integrate in other areas software system of coal-fired power plant, analysis its static and dynamic characteristics will provide strong software support to the economy of the entire power plant, has an important significance of research and engineering applications.This thesis is to focus on the profound theoretical analysis and research on modeling and simulation issues of regenerative system:1) The regenerative system is divided into a plurality of relatively independent subsystems according to the physical characteristics of working fluid flow and major equipment of the system. Using lumped parameter method to establishes the mathematical model of each subsystem; 2) The software package of regenerative system is built, based on the multi-domain unified modeling language Modelica and use object oriented method, with open source development platform OpenModelica; 3) Calculate the static characteristics of Yangzhou Second Power Plant 600MW unit regenerative system on 100% load condition with the software package of regenerative system, and verify the stability of algorithms of the package and parameters accuracy. Proposes a energy-loss analysis method based on static characteristics of regenerative system simulation, compared with the traditional energy-loss analysis method shows that it is expected to be a new method of more-parameters and full variable condition calculation; 4) Simulates the dynamic characteristics of Yangzhou Second Power Plant 600MW unit regenerative system.The main technical parameters dynamic response characteristics of regenerative system is studied while the main regulating variable (such as fuel capacity and turbine disturbance) is changed with disturbance on the T-MCR load condition without regulation, and the simulation results can be applied to optimize the design of control systems.This thesis developed the software package of regenerative system and its application analysis methods based on open source development platform, has high theoretical significance and application value.