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Improving method of energy flow calculation of natural gas system

A technology of energy flow calculation and natural gas, which is applied in calculation, neural learning methods, design optimization/simulation, etc., and can solve problems such as difficulty in selecting the initial value of energy flow calculation

Inactive Publication Date: 2017-06-20
CHONGQING UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the initial value of the energy flow calculation of the existing natural gas system is difficult to select, and combines the global search of the genetic algorithm and the local search ability of the Newton method to provide a genetic-Newton hybrid method for calculating the energy flow of the natural gas system

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  • Improving method of energy flow calculation of natural gas system
  • Improving method of energy flow calculation of natural gas system
  • Improving method of energy flow calculation of natural gas system

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Embodiment Construction

[0099] as attached Figure 4 As shown, taking the 14-node natural gas system as an example, the specific steps of an improved method for energy flow calculation of the natural gas system are as follows:

[0100] (1) Input basic data and initialization

[0101] 1.1 Enter basic data

[0102] First, enter the network structure data. Specifically include: gas source parameters, gas pipeline parameters, compressor parameters, gas load, balance node pressure, and range of node pressure to be requested. 1.2 Parameter initialization

[0103] Set the crossover probability P of the genetic algorithm C =0.8, mutation probability P m = 0.3, variable precision esp = 10 -4 , Population size Pop=200,; Newton method convergence precision ε=10 -6 , the maximum number of iterations of Newton's method iterNWmax=50.

[0104] The network data adopts the data of the 14-node natural gas system in the article "Probabilistic Energy Flow Analysis of Electric-Gas Hybrid Integrated Energy System"...

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Abstract

The invention discloses an improving method of energy flow calculation of a natural gas system. The method comprises the following steps: firstly, inputting network parameters of the natural gas system to establish a natural gas system energy flow calculation model; optimizing the initial value of the natural gas system by means of a genetic algorithm; and finally, calculating the energy flow of the natural gas system by means of a Newton method. By combining global search of the genetic algorithm and local searching abilities of the Newton method, the problem of selecting the initial value of natural system energy flow calculation is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of natural gas system steady-state energy flow calculation, and in particular relates to an improved method for natural gas system steady-state energy flow calculation. Background technique [0002] Energy flow calculation is a basic calculation of natural gas system and the basis of natural gas system planning and operation. The energy flow calculation of the existing natural gas system all uses Newton's method as the core algorithm. Newton's method is an excellent local search algorithm with local quadratic convergence. However, it has a high dependence on the initial value, and improper selection of the initial value will directly affect the convergence of the algorithm. Regarding the initial value of the natural gas system, although some studies specifically point out that the initial value of the natural gas system needs to be carefully selected, the existing research has not given an effective soluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06N3/08G06Q50/06
CPCG06F30/20G06F2111/08G06N3/086G06Q50/06
Inventor 赵霞杨仑胡潇云瞿小斌颜伟余娟
Owner CHONGQING UNIV
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