Natural gas path modeling method for operation control of comprehensive energy system

Abstract

The invention relates to a natural gas path modeling method for operation control of a comprehensive energy system, and belongs to the technical field of operation control of the comprehensive energysystem. The method comprises the following steps: establishing a partial differential equation between flow and pressure in a natural gas pipeline based on a mass conservation and momentum conservation equation in the natural gas pipeline, a natural gas state equation and a flow equation; mapping the gas circuit to a frequency domain by using Fourier transform, and obtaining a lumped parameter model through two-port equivalents; a natural gas supercharger equation is combined, and a natural gas path general branch model is established; defining a node-branch incidence matrix and a node-outflowbranch incidence matrix, and establishing a topological constraint equation of a natural gas path; and establishing a natural gas path equation in combination with the natural gas path general branchmodel and the topological constraint equation of the natural gas path. The method has high unity with a network matrix and a network equation of a power network in mathematical form, thereby laying afoundation for unified analysis of gas and electricity heterogeneous energy flows.

Description

technical field [0001] The invention relates to a natural gas path modeling method for operation control of an integrated energy system, belonging to the technical field of operation control of an integrated energy system. [0002] technical background [0003] The integrated energy system can effectively improve the overall energy efficiency, and has become a hot spot and frontier of scientific research and engineering practice at home and abroad. The planning and operation of the integrated energy system is based on the modeling and analysis of each energy network. The energy flow of electricity and natural gas is tightly coupled. The analysis of electricity is based on the simplification from "field" to "road", and a mature circuit theory has been formed. , while the analysis of natural gas pipelines has not yet formed a unified mature theory. The existing problems in conventional natural gas gas path modeling include: the lack of an intuitive physical model, the interpre...

AI Technical Summary

Problems solved by technology

The existing problems in conventional natural gas gas path modeling include: the lack of an intuitive physical model, the interpretability is not strong; the analysis methods of the gas-electric coupling network cannot be unified, and there are knowledge barriers between the two disciplines of electricity and natural gas; To ensure the accuracy of the solution, it is necessary to introduce a large number of micro-elements in two dimensions of time and space, which faces the problem of high computational complexity

In recent years, the modeling idea of ​​"circuit" theory has been gradually applied to the modeling of natural gas pipelines, but a complete and unified theoretical framework has not yet been formed, and the model is difficult to solve, and it is difficult to further extend it to the planning and operation of integrated energy systems. In various applications

Images