Gas network capacity expansion planning system and method based on relaxation constraints

Abstract

The invention provides a gas network capacity expansion planning system based on relaxation constraints. The gas network capacity expansion planning system comprises a gas network data module, a gas network optimization calculation module and a gas network cost module, wherein the gas network optimization calculation module comprises a gas network constraint module, a gas network cost function module, a mathematical modeling module and an optimization output module. The invention further provides a gas network capacity expansion planning method based on relaxation constraints. The method comprises the following steps: S1, collecting gas network data; S2, establishing gas network constraints and a gas network cost function; S3, constructing a mathematical model of the expansion planning system; S4, performing optimization solution on the mathematical model to obtain an optimization result; and S5, calculating to obtain the total planning cost. According to the gas network capacity expansion planning system and method based on relaxation constraints, a complex algorithm is not used, the solving speed and the optimal solution are guaranteed, and the problem that a model established byan existing gas network capacity expansion planning system is prone to optimization without a solution is solved.

Description

technical field [0001] The present invention relates to the technical field of gas network planning, and more specifically, to a system and method for gas network expansion planning based on relaxed constraints. Background technique [0002] Gas network planning is an important part of natural gas network planning, and its main task is to determine the corresponding optimal gas network grid structure according to the gas load growth and gas source planning during the planning period. However, the current gas network expansion planning system often adopts the classic gas network transient stability optimization model when establishing the model, and does not modify the constraint conditions, but uses multiple objective functions and adds weights to achieve the purpose of expansion planning . The model established by this expansion planning system is relatively complex, and the selection of weight values ​​is very important, and it is easy to have no solution for optimization...

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Problems solved by technology

The model established by this expansion planning system is relatively complex, and the selection of weight values ​​is very important, and it is easy to have no solution for optimization

[0003] In the prior art, such as the Chinese patent published on May 17, 2017, an auxiliary decision-making system for gas pipeline network planning, the publication number is CN106682804A. By establishing the relationship between the current pipeline network model and the current pipeline network load data, the selected suitable planning tasks, but did not improve the model established by the existing gas network expansion planning system

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