基于多领域统一建模语言的火电厂回热系统建模及其应用分析

发布时间：2018-01-07 20:26

本文关键词：基于多领域统一建模语言的火电厂回热系统建模及其应用分析　出处：《东南大学》2015年硕士论文　论文类型：学位论文

【摘要】：火电厂回热系统是全厂热力系统的核心,它的运行情况对整个发电厂的安全性和经济性运行起着十分重大的影响。建立重用性高、拓展性强且易于和火电厂其它领域软件系统集成的回热系统仿真软件包,分析回热系统的静、动态特性,为提高火电厂的运行经济性,提供有力的软件支持,具有重要的研究意义和应用价值。论文对回热系统建模与仿真应用的有关问题,做了理论分析和研究：1)根据回热系统的工质流程及主要设备的物理特性,将回热系统划分为多个相对独立的子系统,运用集总参数法建立了各子系统的数学模型；2)基于多领域统一建模语言Modelica,采用面向对象的方法,使用开源仿真平台OpenModelica,开发了回热系统仿真软件包；3)使用软件包计算分析了扬二电厂600MW机组回热系统100%负荷工况下的静态特性,验证了软件包的算法稳定性和参数精确度。在此基础上提出了一种基于回热系统仿真静态特性的耗差分析方法,和传统耗差分析方法的计算对比表明,可望成为多参数、全变工况计算的耗差分析新方法；4)使用软件包对扬二电厂600MW回热系统进行动态仿真,研究了无调节作用下,回热系统在T-MCR负荷工况下系统主要调节量(燃料量、汽机调门开度)发生扰动时系统主要参数的动态响应特性,其结果可应用于优化控制系统设计中。本文基于开源平台开发的电厂回热系统仿真软件包及其应用分析方法,具有较高的理论意义和应用价值。
[Abstract]:The regenerative system of thermal power plant is the core of the whole plant thermal system, its operation situation plays a very important role in the safety and economic operation of the whole power plant. The simulation software package of regenerative system, which is easy to integrate with other thermal power plant software system, is developed, and the static and dynamic characteristics of regenerative system are analyzed, which can provide powerful software support for improving the operation economy of thermal power plant. This paper makes a theoretical analysis and research on the application of regenerative system modeling and simulation according to the working fluid flow of the regenerative system and the physical characteristics of the main equipment. The regenerative system is divided into several relatively independent subsystems, and the mathematical models of each subsystem are established by means of lumped parameter method. 2) based on the multi-domain unified modeling language Modelica, the simulation software package of regenerative system is developed by using the object-oriented method and the open source simulation platform OpenModelica. 3) the static characteristics of regenerative system of 600MW unit in Yanger Power Plant under 100% load condition are calculated and analyzed by using software package. The algorithm stability and parameter accuracy of the software package are verified. On the basis of this, a loss difference analysis method based on the static characteristics of the regenerative system simulation is proposed, which is compared with the traditional energy loss analysis method. It is expected that it will become a new method for the analysis of loss difference in the calculation of multi-parameter and all-variable working conditions. 4) the dynamic simulation of 600MW regenerative system in Yanger Power Plant is carried out by using software package, and the main regulating quantity (fuel quantity) of regenerative system under T-MCR load condition is studied. Dynamic response characteristics of the main parameters of the system when disturbance occurs. The results can be applied to the design of optimal control system. The simulation software package and its application analysis method developed in this paper based on open source platform are of high theoretical significance and application value.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM621

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