Thermodynamic system dynamic model establishing method

Abstract

The invention discloses a thermodynamic system dynamic model establishing method which belongs to the technical field of thermodynamic system dynamic characteristic analysis and optimal operation. The method comprises the following steps of: analyzing the causal relation between main parameters of a thermodynamic system to be modeled; determining a plurality of input variables, output variables and intermediate variables; according to the transfer order of each of the variables, determining an input layer, an output layer, an intermediate layer and the number of nodes in each layer; connecting the nodes with a causal relation or a reverse causal transfer relation by using directed line segments with arrows; determining an overall causal transfer topological structure of a system; marking standard data structures on each directed line segment representing the causal relation; and identifying related parameters in each data structure by operating measured data by the system. The model established by the method can effectively describe a causal dynamic transfer relation of each key physical parameters in the thermodynamic system, is suitable for analyzing the relation among substances, energy transfer and balance of the thermodynamic system from a relatively macroscopic perspective, thereby analyzing and optimizing the operating characteristics of the system.

Description

A Method for Establishing Dynamic Model of Thermodynamic System technical field The invention belongs to the technical field of characteristic analysis and optimal operation of a thermal system, and in particular relates to a method for establishing a dynamic model of a thermal system. Background technique The dynamic model of the thermal system has important theories for the analysis of operating characteristics, fault detection and diagnosis, system optimization design, energy saving and emission reduction operation mode selection, and simulation platform construction of heating, thermal power generation process or industrial systems with similar thermal processes. significance and application value. At present, the modeling method of thermal system operation model mainly adopts theoretical analysis, empirical induction or a combination of the two methods. The establishment of a theoretical analysis model requires an in-depth understanding of the basic physical and che...

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Problems solved by technology

This method not only cannot guarantee the quality of the model, but also reduces the practicability and applicability of the model to a certain extent.

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