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Heat supply network waterway modeling method for comprehensive energy system scheduling

A technology that integrates energy systems and modeling methods, applied in the field of waterway modeling of heating networks, and can solve problems such as split hydraulic dynamics and steady state connections, and unclear physical meanings.

Active Publication Date: 2020-07-14
TSINGHUA UNIV
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Problems solved by technology

For the hydraulic analysis of the heating network, the steady-state modeling method is generally used in engineering, which splits the connection between the hydraulic dynamics and the steady state, and at the same time, there is a lack of clear physical meaning.

Method used

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  • Heat supply network waterway modeling method for comprehensive energy system scheduling
  • Heat supply network waterway modeling method for comprehensive energy system scheduling
  • Heat supply network waterway modeling method for comprehensive energy system scheduling

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Embodiment Construction

[0084] The heating network waterway modeling method for comprehensive energy system control proposed by the present invention includes the following steps:

[0085] (1) Establish the equipment model of the heating network, including the following steps:

[0086] (1-1) Establishing the thermal pipeline model in the heating network, including the following steps:

[0087] (1-1-1) Establish the mass conservation equation and momentum conservation equation describing the one-dimensional flow process of water in the thermal pipeline:

[0088]

[0089]

[0090] In the above formula, ρ, v and p are the density, flow velocity and pressure of water respectively, λ, D and θ are the friction coefficient, inner diameter and inclination angle of the thermal pipeline respectively, g is the acceleration of gravity, t and x represent time and space respectively;

[0091] (1-1-2) According to the fact that water is an incompressible fluid, establish the differential equation of the dens...

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Abstract

The invention relates to a heat supply network waterway modeling method for comprehensive energy system scheduling, and belongs to the technical field of operation control of comprehensive energy systems. According to the method, a hydraulic analysis model and a power network model are unified, and a relationship between a hydraulic dynamic state and a hydraulic steady state is established. The method is based on characteristic equations of a heat distribution pipeline, a flow control valve and a booster pump. The method comprises: abstracting waterway element models such as water resistance,water inductance and a water pressure source, establishing hydraulic branch characteristics of a heat supply network based on the waterway elements, establishing hydraulic topology constraints of theheat supply network based on Kirchhoff-like voltage and current laws, and finally establishing a steady-state hydraulic network equation by combining the hydraulic branch characteristics and the hydraulic topology constraints. The method is clear in physical significance, covers various devices such as a heat distribution pipeline, a flow control valve and a booster pump, comprehensively considersheat supply network branch characteristics and topological constraints, is high in modeling method applicability, and facilitates unified scheduling of a heat heterogeneous energy flow system and anelectricity heterogeneous energy flow system.

Description

technical field [0001] The invention relates to a waterway modeling method of a heating network used for dispatching of an integrated energy system, and belongs to the technical field of operation control of an integrated energy system. [0002] technical background [0003] 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F113/08G06F119/08G06F119/14
CPCG06F2119/08G06F30/28G06F2119/14G06F2113/08G06F2113/14G06F30/18G06F2111/10
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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