Heat supply network model optimization method based on heat supply pipeline network topology transformation

Abstract

The invention discloses a heat supply network model optimization method based on heat supply pipeline network topological transformation. The method comprises the following steps: calculating working medium transmission time delay of a branch pipeline at each node of a heat supply pipeline network; according to the sequence of transmission time delays from small to large, connecting and combining the branch pipelines at all the nodes in series into one pipeline; calculating pipeline parameters of the combined pipeline; judging whether the heat supply pipeline network has branch pipelines or not, if yes, repeating the previous steps, and if not, setting a simplified threshold value; integrating the pipelines with no branch pipelines flowing out of the nodes at the two ends into a new node; calculating pipeline parameters of the integrated pipeline; judging whether the number of the pipelines is smaller than or equal to a simplification threshold value E, if yes, obtaining a heat supply pipeline network model finally meeting the simplification requirement, and if not, repeating the previous steps. According to the method, heat supply network simplification is realized, and the data dimension of a heat supply network model in electric heating combined dispatching is reduced; and the method can effectively reduce the solving complexity of large-scale electric heating joint scheduling, and improves the solving efficiency.

Description

technical field [0001] The invention relates to the technical field of electricity-heat combined dispatching models, in particular to a heating network model optimization method based on heating pipeline network topology transformation. Background technique [0002] In recent years, under the leadership of the national plan of "vigorously developing new energy" and "promoting central heating", my country's "Three Norths" (Northeast, North China, and Northwest) regions are forming energy sources with high proportions of wind power and high proportions of combined heat and power units. structure. Uncertain wind power output and the severe wind curtailment problem caused by the heat-fixed mode of cogeneration units make the traditional deterministic electric-thermal separation operation system begin to coordinate the electric-thermal integration of electric energy and thermal energy production and consumption in a wider range. Energy system transformation. In order to maintain...

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Problems solved by technology

Since the full physical model of the heating network is privately owned by each heating company, the physical information parameters required for the node model of the heating network in the combined electricity and heat dispatching cannot be provided to the power system operator or other heating companies, so that centralized electricity and heating combined scheduling cannot be performed

Algorithms such as Benders decomposition algorithm and alternating direction multiplier method are often used in the existing technology to calculate the electricity and heat subjects separately. Although the interaction privacy problem between the electricity and heat subjects is solved, it is difficult to apply to different heat companies in the heat system. The above-mentioned coordinated scheduling method will also increase the communication burden of the scheduling process and reduce the solution efficiency

On the other hand, the heating area of ​​a single heating company can reach several hundred to tens of millions of square meters, and the heating pipe network can reach tens to hundreds of kilometers. In the middle, the large-scale pipeline model will generate a huge amount of constraints on the state of the heating network, which makes the solution of the scheduling model complex

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