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Optimal operation method of multi-energy flow system considering transient heat transfer characteristics of district heating network

A technology of heat transfer characteristics and operation methods, which is applied in the field of multi-energy flow system optimization operation, and can solve problems such as time-consuming, difficult multi-energy flow system ultra-short-term scheduling, errors, etc.

Active Publication Date: 2020-03-31
SOUTHEAST UNIV
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Problems solved by technology

Some scholars only focus on the heat transfer characteristics of the heat network, and use methods such as numerical simulation and experimental modeling. Although they can obtain high-precision thermal data, the models used are relatively complex, and the solution takes a long time. The water supply temperature of the heat source is difficult to apply to the ultra-short-term scheduling of the multi-energy flow system
Some scholars have made a lot of simplifications to the heat transfer characteristics and network constraints of the heat network for the steady-state heat transfer problem. Although the heat network model is easy to solve, when the system scheduling period is equivalent to the heat network delay, it will lead to significant error

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  • Optimal operation method of multi-energy flow system considering transient heat transfer characteristics of district heating network
  • Optimal operation method of multi-energy flow system considering transient heat transfer characteristics of district heating network
  • Optimal operation method of multi-energy flow system considering transient heat transfer characteristics of district heating network

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Embodiment Construction

[0147] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0148] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein Explanation.

[0149] The system structure in the embodiment of the present invention is as figure 2 As shown, the system consists of gas turbine, gas boiler, waste heat boiler, electric refrigerator, hot water absorption refrigerator, heat exchanger, and battery, and is connected to photovoltaic equipment at...

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Abstract

The invention discloses a multi-energy flow system optimization operation method considering the transient heat transfer characteristics of a regional heat network. The method includes the following steps that: step 1) a regional heat network transient heat transfer characteristic model considering a water return pipe network topological structure, a pipe section temperature change dynamic processand a pipe section transmission delay is established based on a graph theory, wherein the model mainly comprises six aspects, namely, a heat source characteristic a heat load characteristic, node flow balance, a node power fusion characteristic, a pipe section heat transfer characteristic and a pipe section transient / steady heat transfer characteristic; and step 2) a multi-energy flow system operation optimization model is established, with the lowest total operating cost of a system in the next 4 hours adopted as an objective function, on the basis of operational constraints that the systemshould meet, the real-time output of each device in the multi-energy flow system, the real-time supply and return water temperature of each heat source of the heat network, and the like, are realized,and the scheduling and optimized operation of the system can be realized. According to the method of the invention, the transient heat transfer characteristics of the regional heat network are considered, so that the optimal operating state of the multi-energy flow system is more consistent with the actual operating state of the system.

Description

technical field [0001] The invention relates to a multi-energy flow system optimization operation method, and specifically belongs to the technical field of energy system operation optimization. Background technique [0002] With the increasing world energy crisis and environmental pollution, innovative ideas such as energy Internet, integrated energy system, and "Internet +" smart energy are emerging. It is of great significance to transform the energy supply mode and build a clean and efficient modern energy system. Relying on the continuous innovation of energy transmission technology, energy conversion equipment and renewable energy and other related technologies, the multi-energy flow system couples multiple energy networks such as power grids, heating networks and natural gas networks, which is conducive to the realization of multi-energy coordinated supply and comprehensive energy cascade utilization. It has gradually become one of the important development trends in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/32H02J3/38G06Q10/06G06Q50/06
CPCG06Q10/06312G06Q10/06315G06Q50/06H02J3/003H02J3/008H02J3/32H02J3/383H02J2203/20Y02E10/56Y02E40/70Y04S10/50
Inventor 姚帅顾伟陆帅吴晨雨
Owner SOUTHEAST UNIV
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