A gas network expansion planning system and method based on relaxation constraints

Abstract

The invention provides a gas network expansion planning system based on relaxation constraints, including a gas network data module, a gas network optimization calculation module and a gas network cost module; wherein, the gas network optimization calculation module includes a gas network constraint module, a gas network cost function module, Mathematical modeling module and optimized output module. The present invention also provides a gas network expansion planning method based on relaxing constraints, comprising the following steps: S1: collecting gas network data; S2: establishing gas network constraints and a gas network cost function; S3: building a mathematical model of the expansion planning system; S4: The mathematical model is optimized and solved, and the optimization result is obtained; S5: Calculate the total planning cost. The invention provides a gas network expansion planning system and method based on relaxation constraints, without using complex algorithms, ensuring the speed of solving and the existence of an optimal solution, and solving the problem that the model established by the existing gas network expansion planning system is prone to appear. The problem of optimizing the unsolvable case.

Description

technical field [0001] The invention relates to the technical field of gas network planning, and more particularly, to a gas network expansion planning system and method based on relaxation of constraints. Background technique [0002] Gas network planning is an important part of natural gas network planning. Its main task is to determine the corresponding optimal gas network grid structure according to the gas load growth during the planning period and the gas source planning. However, the current gas grid expansion planning system often uses the classic gas grid transient steady-state optimization model when establishing the model, and does not modify the constraints, but uses multi-objective functions and weights to achieve the purpose of expansion planning. . The model established by this capacity expansion planning system is relatively complex, and the selection of the weight value is very important, and it is prone to the situation that the optimization has no solutio...

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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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