热力系统流体网络法的研究

为了使热力系统易于用计算机语言表示, 实现热力系统的图形化建模和热力系统运行方式的动态改动及热力系统的自动扩展, 采用了一种全新的方法来研究大型火电机组的热力系统, 即流体网络法。它利用电网络成熟的理论来分析热力系统, 将整个热力系统类比为流体网络。首先定义了网络图的矩阵表示, 证明了简单图的关联矩阵T的秩Rank(T)为v 1, 并对热力系统的流体网络图进行了分析, 获得热力系统流体网络有向图的关联矩阵。然后利用热力系统有向图的关联矩阵, 导出了热力系统的质量平衡方程和能量平衡方程, 综合质量平衡方程和能量平衡方程导出了热力系统流体网络法的特征矩阵方程。最后基于流体网络法的特征矩阵方程提出了流体网络法的工程解决方案, 并利用实例计算结果验证了本方法的正确。

Research of Fluid Gird Method Based on Power Plant Thermodynamic System

This paper presents a novel method for the study of lager fossil unit thermodynamic systems, which is referred to as the fluid grid method. This method analyses thermodynamic systems by means of the mature electrical network theory, and uses a fluid grid as an analogy of a thermodynamic system. It defines firstly the matrix representation of gird and proves that the Rank of simple graph conjunction matrix is a v-1 conjunction matrix and obtains the conjunction matrix of a directed graph of a thermodynamic system fluid grid by analyzing the fluid grid of a thermodynamic system. And then it derives the mass and energy balance equations by means of the directed graph of a thermodynamic system and further derives the characteristic matrix equation for the fluid grid method by integrating the mass and energy equations. Finally it proposes an implementation scheme of the fluid grid method based on the characteristic matrix equation. An experimental study on a real-time example verifies the validity of this proposed method.