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Method for calculating natural gas flow pressure scheduling decision index of natural gas pipeline network
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A natural gas pipeline network, flow pressure technology, applied in calculation, computer-aided design, design optimization/simulation, etc., can solve problems such as insufficient safety and reliability, long operating time period, and insufficient response
Pending Publication Date: 2021-07-16
CNOOC GAS & POWER GRP
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[0006] The purpose of the present invention is to provide a calculation method for the decision-making index of natural gas flow pressure scheduling in the natural gas pipeline network, so that the existing solutions have problems such as long running time period, insufficient response and insufficient safety and reliability.
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Embodiment 1
[0049] Embodiment 1 provides a natural gas pipeline network, the structure of which will be described in detail below.
[0050] refer to figure 1 , the natural gas pipeline network includes a gas transmissiontrunk line 12, several gas storage facilities 1, 2, 3, 4, several gas source points 5, 6, 7, 8 and several control nodes 9, 10, 11.
[0051] Among them, gas storage facilities 1, 2, 3, and 4 are used to store gas, gas source points 5, 6, 7, and 8 are connected to gas sources, and control nodes 9, 10, and 11 have a greater impact on the hydraulic balance of the overall natural gas pipeline network.
[0052] One main gas transmission line 12 communicates with several gas source points 5, 6, 7, 8 through pipelines, and several gas storage facilities 1, 2, 3, 4 communicate with said main gas transmission line 12 through pipelines.
[0053] The main gas transmission line 12, several gas source points 5, 6, 7, 8, several gas storage facilities 1, 2, 3, 4 and several control no...
Embodiment 2
[0057] Embodiment 2 provides a calculation method of a natural gas pipeline network natural gas flow pressure scheduling decision index, using the natural gas pipeline network provided in Embodiment 1, the calculation method includes the following steps:
[0058] Step S1: Establish the pressure calculation model of the natural gas pipeline network, which specifically includes the following steps:
[0059] Step S11: Set the number and number of gas storage facilities, gas source points, control nodes and remote monitoring stations of the natural gas pipeline network;
[0060] Let the number of gas storage facilities in the natural gas pipeline network be n 1 , and number the gas storage facilities as 1, 2, ..., n 1 ;
[0061] Let the number of gas source points in the natural gas pipeline network be n 2 and number the gas source points as n 1 +1,n 1 +2,...,n 1 +n 2 ;
[0062] Let the number of control nodes in the natural gas pipeline network be n 3 , and number the co...
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Abstract
The invention discloses a method for calculating a natural gas flow pressure scheduling decision index of a natural gas pipeline network. The method comprises the following steps: establishing a pressure calculation model of the natural gas pipeline network; substituting the actual pressure data of all gas source points, gas storage facilities and control nodes at the kth moment into the scheduling index model for calculation to obtain the operation pressure calculation values of all the gas source points, the gas storage facilities and the control nodes of the natural gas pipeline network at the (k + 1) th moment; and calculating the natural gas flow pressure values of the gas storage facilities, the gas source points and the control nodes. According to the method for calculating the natural gas flow pressure scheduling decision index of the natural gas pipeline network, a mode of modeling decision index parameters of key nodes is adopted, so that the operation condition of the gas pipeline network can be simulated; the problems that a common hydraulic simulation method is large in actual data deviation degree, long in consumed time period, not timely in reaction and insufficient in safety and reliability, and an empirical index method lacks scientific support and is narrow in application range are solved.
Description
technical field [0001] The invention relates to the technical field of liquefied natural gas equipment, in particular to a calculation method for a natural gas flow pressure scheduling decision index of a natural gas pipeline network. Background technique [0002] The production and operation of long-distance natural gas pipelines and pipeline networks fluctuate greatly with the changes in the peak and valley of gas consumption of downstream users. It is closely related to nighttime, and also fluctuates greatly with the change of the number of users in different locations of the pipeline network, so it has the characteristics of unevenness and instability. Therefore, in order to adapt to the uneven gas consumption of downstream users and ensure the pressure and flow required by the user's gas equipment, the actual pipeline network needs to change the gas supply volume and pressure at all times during operation to balance the gas supply volume of the gas storage facilities in...
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