An Optimal Solution Method for the Calculation of Transmission Difference of Natural Gas Pipeline Network

Abstract

The invention relates to an optimal solution method for the calculation of natural gas pipeline network transmission difference, which belongs to the field of natural gas transportation; it solves the problems of large transmission difference calculation errors and cumbersome procedures; the technical solution is: firstly, according to the physical structure of the natural gas pipeline network, establish Visualize the natural gas pipeline network model, then set the boundary conditions, and then comprehensively consider the relationship between components and nodes in hydraulics, thermodynamics and topology, establish a system calculation model for the natural gas pipeline network, and use the fourth-order Runge-Kutta method to solve the constant Differential equations, and finally combined with the SCADA system to collect the input and output gas volumes of the natural gas pipeline network, the self-use gas volume and the air discharge volume, and calculate the transmission difference and transmission rate of the natural gas pipeline network. The present invention considers the influence of multiple factors, and is more in line with the actual situation. The system operation interface and language of the present invention are simple, and the mixed programming of Python and Matlab is used to shorten the calculation cycle of the transmission difference and greatly improve the calculation efficiency.

Description

technical field [0001] The invention belongs to the field of natural gas transportation, and in particular relates to an optimal solution method for calculating the transmission difference of a natural gas pipeline network. Background technique [0002] During the pipeline transportation of natural gas, the natural gas pipeline is a unified, continuous and closed hydraulic system. According to the law of conservation of mass, if there is no leakage of natural gas during the transportation process, the transmission difference should be zero. However, since the value of natural gas is determined by measuring instruments, there are inevitably errors in measuring instruments; and as the actual working conditions of the pipeline change, the natural gas storage capacity in the pipeline will also change accordingly, so long-distance pipeline transportation In the process, there will inevitably be losses. As a profit-making organization, the natural gas company will inevitably affe...

AI Technical Summary

Problems solved by technology

However, the average pressure and temperature are difficult to accurately reflect the actual working conditions of the pipeline, so the calculated pipe stock cannot reflect the actual pipe stock of the pipeline. TGNET software can calculate the pipe stock of the pipeline, but TGNET software does not have the function of calculating the transmission difference, and its The built-in gas state equations are BWRS, SRK, Peng, etc. However, the AGA8-92DC equation is more suitable for the calculation of natural gas physical properties under pipeline transportation conditions

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