基于层次分析的热力系统模型简化方法研究

Study on Simplified Method of Thermal System Models Based on Hierarchical Analysis

将用于系统建模与评估的层次分析法应用于复杂热力系统的模型简化,通过对系统结构层次的分析,将系统各个组成元素在不同水平上分组,构成一个相互关联的有序层次;然后判断系统中每个元素对于研究目标的相对重要程度,并将这些判断用数值量化,在层次分析提供的元素关联信息的基础上构造比较矩阵;最后,根据比较矩阵中蕴含的元素信息,计算分析系统中各元素的相对重要性,通过将系统中一些冗余或者次要的元素舍去,实现模型的有条件简化。

The hierarchical analysis process used in system modeling and evaluation is applied to the model simplification of complex thermal systems in this paper. We grouped every system component elements in different levels through the analysis of system structure, thus formed an intercon-nected orderly hierarchy. And then the relative importance to study target of each element in sys-tem is determined and judged by numerical quantification, and a comparison matrix is structured based on the related information that provided by hierarchical analysis. Finally, according to the information contained in comparison matrix, the relative importance of each element in system is calculated and analysed, and the conditional simplification of thermal system models is realized by omitting some redundant or minor elements in the system.