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A Modeling Method for Heating Network Heat Path for Integrated Energy System Scheduling

A technology of comprehensive energy system and modeling method, which is applied in the field of heating network heat circuit modeling, can solve problems such as large amount of calculation and unclear physical meaning, and achieve the goal of overcoming pipeline time delay, clear physical meaning, and ensuring engineering accuracy Effect

Active Publication Date: 2021-10-15
TSINGHUA UNIV
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Problems solved by technology

However, the finite element method requires discrete difference in two dimensions of space and time, which requires a huge amount of calculation, and the physical meaning is not clear at the same time; the node method discretizes the continuous water flow in the pipeline into independent water packets according to time, when the discrete interval is large will introduce large error

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  • A Modeling Method for Heating Network Heat Path for Integrated Energy System Scheduling
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  • A Modeling Method for Heating Network Heat Path for Integrated Energy System Scheduling

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Embodiment Construction

[0070] The method for modeling the thermal path of the heating network for integrated energy system scheduling proposed by the present invention includes the following steps:

[0071] (1) Establish a model of the thermal pipeline in the heating network, including the following steps:

[0072] (1-1) Establish the energy conservation equation for the one-dimensional flow process of water in the thermal pipeline of the heating network as follows:

[0073]

[0074] In the above formula, c and ρ are the specific heat capacity and density of water, A is the cross-sectional area of ​​the thermal pipeline, G is the mass flow rate of water, T is the excess temperature, T is equal to the difference between the water temperature and the ambient temperature, μ is the heat dissipation coefficient of the pipeline, τ and x represent time and position, respectively;

[0075] (1-2) Define the thermal resistance R in the thermal pipeline t , thermal conductivity g t , heat L t and heat ...

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Abstract

The invention relates to a heat supply network heat path modeling method for integrated energy system scheduling, and belongs to the technical field of operation control of integrated energy systems. Based on the energy conservation equation of the thermal pipeline in the heating network, this method establishes the lumped parameter model of the thermal pipeline in the frequency domain; based on the above model, the characteristics of the thermal branch of the heating network are established; The confluence process and diversion process establish the thermal topological constraints of the heating network; the thermal branch characteristics and thermal topology constraints of the heating network are integrated to establish the thermal circuit model of the heating network. This method has a clear physical meaning of the thermal circuit model, comprehensively considers the branch circuit characteristics and topological constraints, and is highly unified with the power network model in mathematical form. Two kinds of heterogeneous energy flow problems of electricity, and can reduce the amount of calculation while ensuring engineering accuracy, and promote the optimization of integrated energy system scheduling.

Description

technical field [0001] The invention relates to a heat supply network heat path modeling method for integrated energy system scheduling, and belongs to the technical field of operation control of integrated energy systems. Background technique [0002] As a typical representative of comprehensive energy systems, thermoelectric coupling systems can give full play to the coupling characteristics of heat and electricity and improve the efficiency of comprehensive energy utilization, and have received extensive attention and research from scholars at home and abroad. At present, a series of applications such as combined heat and power flow calculation, combined heat and power economic dispatch, combined heat and power planning and combined heat and power state estimation have been developed, all of which are based on the modeling and analysis of power and heating networks. Among them, the analysis of power network based on circuit theory has formed a mature AC power flow model a...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/08G06Q10/06G06Q50/06
CPCG06Q10/06312G06Q50/06
Inventor 孙宏斌郭庆来王彬陈彬彬潘昭光吴文传
Owner TSINGHUA UNIV
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