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Day-ahead economic scheduling method for electric-pneumatic coupled system based on mixed integer second-order cone programming

A second-order cone programming, mixed integer technology, applied in data processing applications, instruments, forecasting, etc., can solve the problem of difficulty in obtaining an electrical-gas coupling system, inability to meet the operation requirements of natural gas system networks, and transmission flow errors of natural gas network gas pipelines. And other issues

Active Publication Date: 2018-11-20
XI AN JIAOTONG UNIV
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Problems solved by technology

However, the piecewise linearization method is an approximation method, and it is difficult to obtain accurate results of the economic dispatch of the electric-pneumatic coupling system. The node pressure of the natural gas network and the transmission flow rate of the gas pipeline obtained by the solution have large errors. It cannot meet the network operation requirements of the natural gas system, and cannot provide reasonable guidance and suggestions for the operation and scheduling of the electric-gas coupling system
In order to improve the calculation accuracy, the piecewise linearization method needs to increase the number of pieces, resulting in a greatly reduced solution efficiency

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  • Day-ahead economic scheduling method for electric-pneumatic coupled system based on mixed integer second-order cone programming
  • Day-ahead economic scheduling method for electric-pneumatic coupled system based on mixed integer second-order cone programming
  • Day-ahead economic scheduling method for electric-pneumatic coupled system based on mixed integer second-order cone programming

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[0048] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described here are only used to explain the present invention, not to limit the present invention.

[0049] see figure 1 , the present invention provides a method for economic dispatching of electrical-pneumatic coupling systems based on mixed integer second-order cone programming, including the following steps:

[0050] Step 1. Obtain the basic parameters and operation requirements required for the day-ahead economic dispatch of the electric-pneumatic coupling system.

[0051] The basic parameters include the basic parameters of the power system and natural gas system, as shown in Table 1, where the compressor only considers the type driven by the gas turbine; the operation requirements include the sc...

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Abstract

The invention discloses a day-ahead economic scheduling method for an electric-pneumatic coupled system based on mixed integer second-order cone programming. A function whose all-day energy and spareall-in cost are minimum is used as a target function, and constraint conditions of a power system and a natural gas system, and electric-pneumatic coupling and conversion relations are considered, toestablish an optimization model of electric-pneumatic coupled system day-ahead economic scheduling. On the basis of the model, through second-order cone relaxation of a steady-state airflow equation of a gas pipeline, a mixed integer second-order cone programming model of day-ahead economic scheduling of the electric-pneumatic coupled system is established, and an initial operation scheme is solved and obtained. Aimed at a problem that an initial scheduling result of a natural gas system is not accurate, a calibration model based on a steady-state power flow calculation method of a natural gassystem is established, so as to modify an initial operation scheme. The method realizes accurate solution of a non-convex nonlinear optimization problem, and provides a feasible, economical and accurate optimal operation scheme for electric-pneumatic coupled system day-ahead scheduling.

Description

technical field [0001] The invention relates to a day-ahead economic scheduling method for an electric-gas coupling system, in particular to a day-ahead economic scheduling method for an electric-gas coupling system based on mixed integer second-order cone programming. Background technique [0002] In recent years, serious environmental pollution problems have accelerated the construction and development of gas generating units (gas generating units) fueled by clean energy. At the same time, breakthroughs in shale gas technology in the United States have greatly reduced the cost of natural gas and provided new opportunities for the development of gas-fired units. Compared with traditional coal-fired units, gas-fired units have the advantages of rapid performance and flexible control, so they are often used in power systems to balance real-time load fluctuations and relieve system peak-shaving pressure. With the rapid development of gas-fired units, the electric-pneumatic co...

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06
Inventor 别朝红刘凡王旭
Owner XI AN JIAOTONG UNIV
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