母管制机组的负荷优化分配策略在DCS中的应用研究

发布时间：2018-03-03 19:12

本文选题：供热机组　切入点：负荷分配　出处：《华北电力大学》2013年硕士论文　论文类型：学位论文

【摘要】：本文以热电厂母管制运行的供热机组为研究对象，，把总汽耗量最小作为最优目标，对供热机组间的负荷优化分配策略在DCS中应用研究进行探讨。论文首先分析了热电厂中比较常见类型的供热机组的热力特性，确定了各自的汽耗特性描述方程；并对汽耗特性曲线进行拟合时所需的数据来源及修正作了阐述，并采用最小二乘法进行拟合；在母管制特性的基础上，建立了精确的热电负荷优化分配的数学模型。对线性规划问题求解进行了分析研究，利用改进的罚函数法使具有约束的线性规划问题转化为无约束的极值问题。同时，针对分散控制系统的组态，通过利用CSPA-2000分布式自动化系统的CyberLogic逻辑组态为例，说明该系统的逻辑组态生成步骤；在CyberLogic逻辑组态环境下搭建了负荷优化分配策略的逻辑组态图，因时间有限以及CSPA-2000分布式自动化系统知识产权等问题，只是对部分功能块图进行了阐述分析。最后，对热电负荷优化的实例模型所采用分配策略，通过MATLAB提供的动态仿真工具Simulink平台的功能块进行搭建，通过实例进行仿真，对仿真结果进行分析。仿真结果证明本文所研究的负荷优化分配方案具有很高的可行性和良好的应用前景。
[Abstract]:In this paper, the optimal load distribution strategy between heating units in DCS is discussed by taking the minimum total steam consumption as the optimal objective and taking the heat supply units as the research object. Firstly, the paper analyzes the thermodynamic characteristics of common types of heat supply units in thermal power plants, and determines their respective description equations of steam consumption characteristics, and expounds the data source and correction needed when fitting the characteristic curves of steam consumption. On the basis of the characteristic of bus control, the mathematical model of optimal distribution of thermoelectric load is established by using the least square method. In this paper, the problem solving of linear programming is analyzed and studied. By using the improved penalty function method, the constrained linear programming problem is transformed into an unconstrained extremum problem. At the same time, for the configuration of decentralized control system, By using the CyberLogic logic configuration of the CSPA-2000 distributed automation system as an example, the generating steps of the logic configuration of the system are explained, and the logic configuration diagram of the load optimal allocation strategy is built in the CyberLogic logical configuration environment. Due to limited time and intellectual property rights of CSPA-2000 distributed automation system, only some function block diagrams are described and analyzed. Finally, the allocation strategy of the example model of thermal power load optimization is constructed by the function block of Simulink platform provided by MATLAB, and the simulation is carried out through an example. The simulation results show that the optimal load allocation scheme studied in this paper has high feasibility and good application prospect.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TM621

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