A performance identification method and system for multiple air compressor groups based on pipeline loss consideration

Abstract

The present invention discloses a method and system for identifying the performance of multiple air compressor groups based on consideration of pipeline losses. The method comprises the following steps: calculating the effective output flow of the current air compressor group; calculating the total output flow of all air compressor groups based on the effective output flow and the location information of all air compressor groups; obtaining the total flow required for the working area; and dynamically adjusting the total flow required for the working area and the total output flow. This ensures that the system can operate normally, preventing either insufficient air supply affecting operation or excessive air supply causing energy waste, thereby improving the reliability and cost-effectiveness of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of system deviation correction, and in particular to a method and system for identifying the performance of a multi-air compressor group based on consideration of pipeline loss. Background Art

[0002] At present, air compressors have become indispensable equipment in the coal industry. Air compressors often appear in groups to ensure that equipment in the work area can work normally. Due to the large number of equipment and large groups, untimely gas supply often occurs. Insufficient gas supply will cause the equipment to fail to operate normally and cause economic losses. If the equipment continues to work under conditions of insufficient gas supply, it may also cause accidents, endangering production safety and affecting the personal safety of workers underground in coal mines.

[0003] Existing technologies usually do not consider the differences in flow losses under different conditions and distances, and often use a flow rate that is much greater than the actual demand for supply. When the air supply volume is greater than the required airflow, the air flow rate is not reduced, resulting in a certain degree of energy waste. In addition, when the air supply volume is insufficient, the method of directly increasing the airflow supply is often adopted, without considering the amount of energy loss along the pipeline, thereby increasing the air supply cost.

[0004] Therefore, it is necessary to design a performance identification method and system for multiple air compressor groups based on pipeline loss considerations to effectively monitor the gas supply of the air compressors and prevent property losses or even safety accidents caused by insufficient gas supply to the air compressors. Summary of the Invention

[0005] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a performance identification method and system for multiple air compressor groups based on pipeline loss consideration, combined with the location information and air supply capacity of the air compressor group, to achieve intelligent joint control and efficient operation of the air compressor group.

[0006] On the one hand, in order to achieve the above technical objectives, the present invention provides a method for identifying the performance of a multi-air compressor group based on considering pipeline losses, comprising:

[0007] S1, calculate the output effective flow of the current air compressor group;

[0008] S2, calculating the total output flow of all the air compressor groups according to the output effective flow and the position information of all the air compressor groups;

[0009] S3, obtain the total flow required in the working area;

[0010] S4, performing dynamic adjustment according to the total flow required by the working area and the total output flow.

[0011] Optionally, the process of obtaining the output effective flow of the current air compressor group is:

[0012] The output effective flow of the current air compressor group is calculated based on the position information of each air compressor group in the current air compressor group and the output flow of each air compressor in the current air compressor group.

[0013] Optionally, the calculation formula for the output effective flow is:

[0014]

[0015] Where q i is the effective output flow of the i-th air compressor group; q 0j ,c i,j is the fitting function coefficient; x i,j is the distance from the jth air compressor in the i-th air compressor group to the total air pipeline of the air compressor group; n is the total number of air compressors in the i-th air compressor group.

[0016] Optionally, the fitting function coefficient q 0j and the fitting function coefficient c i,j The acquisition process is:

[0017] For each air compressor in the i-th air compressor group, monitor the first effective flow value of the distance from the j-th air compressor in the i-th air compressor group to the total air pipeline of the air compressor group, take the distance as the horizontal axis and the first effective flow value as the vertical axis, and obtain a first functional relationship expression between the first effective flow value of the air compressor and the distance through linear function fitting. According to the first functional relationship expression, obtain the fitting function coefficient q corresponding to each air compressor 0j and the fitting function coefficient c i,j .

[0018] Optionally, the calculation formula for the total output flow is:

[0019]

[0020] Where, Q is the total output flow; q 0i ,C i is the fitting function coefficient; X i is the air pipeline transmission distance of the i-th air compressor group; m is the total number of all air compressor groups.

[0021] Optionally, the fitting function coefficient q 0i and the fitting function coefficient C i The acquisition process is:

[0022] For each air compressor group, monitor the second effective flow value of the air pipeline transmission distance of the i-th air compressor group, take the transmission distance as the horizontal axis and the second effective flow value as the vertical axis, and obtain the second functional relationship expression between the second effective flow value of the air compressor and the transmission distance through linear function fitting. According to the second functional relationship expression, obtain the fitting function coefficient q corresponding to each air compressor. 0i and the fitting function coefficient C i .

[0023] Optionally, the dynamic adjustment in S4 includes:

[0024] When the total output flow rate is greater than or equal to the total flow rate required by the working area, the working efficiency of the air compressor group is reduced in descending order according to the distance between the air compressor group and the equipment working area;

[0025] When the total output flow rate is less than the total flow rate required by the working area, the working efficiency of the air compressor group is improved from near to far.

[0026] On the other hand, in order to achieve the above technical objectives, the present invention provides a multi-air compressor group performance identification system based on considering pipeline loss, comprising:

[0027] Computing module and control module;

[0028] The computing module and the control module are wirelessly connected;

[0029] The calculation module is used to calculate the output effective flow of the current air compressor group; it is also used to adjust the working efficiency of each air compressor;

[0030] The control module is used to calculate the total output flow of all air compressor groups based on the output effective flow and the position information of all air compressor groups; it is also used to obtain the total flow required by the working area; and it is also used to perform dynamic adjustment based on the total flow required by the working area and the total output flow.

[0031] The present invention has the following technical effects:

[0032] The calculation module and control module of the present invention can ensure the normal operation of the system, and there will be no phenomenon of insufficient gas supply affecting the work, nor will there be a situation of excessive gas supply causing energy waste. It can prevent insufficient flow supply from affecting production and causing economic losses, and also prevent insufficient flow supply from causing safety hazards, thereby improving the reliability and economy of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 This is a flow chart of a method for identifying the performance of a multi-air compressor group based on consideration of pipeline loss in accordance with a first embodiment of the present invention;

[0035] Figure 2 This is a diagram of a fitting process of a functional relationship according to an embodiment of the present invention;

[0036] Figure 3 This is a working diagram of a multi-air compressor group performance identification system based on consideration of pipeline loss according to a second embodiment of the present invention;

[0037] Figure 4 This is a workflow diagram of the air compressor group calculation module according to the second embodiment of the present invention;

[0038] Figure 5 This is a flowchart of the control module of Example 2 of the present invention. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] Example 1

[0041] like Figure 1 As shown, the present invention discloses a method for identifying the performance of a multi-air compressor group based on considering pipeline loss, comprising:

[0042] S1, calculate the output effective flow of the current air compressor group. According to the position information of each air compressor group in the current air compressor group and the output flow of each air compressor in the current air compressor group, the output effective flow q of the current air compressor group is calculated. The calculation formula is:

[0043]

[0044] Where q i is the effective output flow of the i-th air compressor group; q 0j ,c i,j is the fitting function coefficient; x i,jis the distance from the jth air compressor in the i-th air compressor group to the total air pipeline of the air compressor group; n is the total number of air compressors in the i-th air compressor group.

[0045] Further, if Figure 2 As shown, the fitting function coefficient q 0j ,c i,j The fitting process includes:

[0046] By calling the poly fit function in Matlab, we can obtain the following: For each air compressor in the i-th air compressor group, we monitor the total air pipeline distance x between the j-th air compressor in the i-th air compressor group and the air compressor group. i,j The effective flow value q under ij , with a spacing of x i,j The horizontal axis is the effective flow value q ij As the vertical axis, the first functional relationship expression between the effective flow value of the air compressor and the interval distance is obtained by linear function fitting. According to the first functional relationship expression, the fitting function coefficient q corresponding to each air compressor is obtained. 0j and the fitting function coefficient c i,j .

[0047] S2, calculate the total output flow Q of all air compressor groups based on the output effective flow q and the location information of all air compressor groups. The calculation formula is:

[0048]

[0049] Where, Q is the total output flow; q 0i ,C i is the fitting function coefficient; X i is the air pipeline transmission distance of the i-th air compressor group; m is the total number of all air compressor groups.

[0050] Further, if Figure 2 As shown, the fitting function coefficient q 0i ,C i The fitting process includes:

[0051] For each air compressor group, monitor the air pipeline transmission distance X of the i-th air compressor group i The effective flow rate q under i , with transmission distance X i The horizontal axis is the effective flow rate q i The vertical axis is the effective flow rate q of the air compressor obtained by linear function fitting. i and transmission distance X i The second functional relationship expression of , according to which the fitting function coefficient q corresponding to each air compressor is obtained 0i and the fitting function coefficient Ci .

[0052] S3, the control module obtains the total flow Q' required in the working area.

[0053] S4, based on the total flow rate Q' required by the working area and the total output flow rate Q, dynamic adjustment is performed to ensure the normal operation of the equipment in the working area. When the total output flow rate Q ≥ the total flow rate Q' required by the working area, the working efficiency of the air compressor group is reduced in descending order according to the distance between the air compressor group and the equipment working area;

[0054] When the total output flow Q is less than the total flow Q' required by the working area, the working efficiency of the air compressor group is improved from near to far.

[0055] Example 2

[0056] like Figure 3 As shown, the present invention discloses a multi-air compressor group performance identification system based on considering pipeline loss, comprising:

[0057] Computing module and control module; the computing module is a computer installed in each air compressor group; the computing module and the control module are wirelessly connected;

[0058] like Figure 4 As shown, the computer can calculate the output effective flow of the current air compressor group, and can also receive the control signal of the control module to adjust the operating frequency of each air compressor in the air compressor group. The calculation formula for the output effective flow is:

[0059]

[0060] Where q i is the effective output flow of the i-th air compressor group; q 0j ,c i,j is the fitting function coefficient; x i,j is the distance from the jth air compressor in the i-th air compressor group to the total air pipeline of the air compressor group; n is the total number of air compressors in the i-th air compressor group.

[0061] like Figure 5 As shown, the control module can receive the output effective flow and the total flow required in the working area calculated by the computer of each air compressor group; it can also calculate the total output flow of all air compressor groups according to the position information and output effective flow of all air compressor groups, and dynamically adjust according to the total flow required in the working area and the total output flow. The control module sends the adjustment information to the corresponding air compressor group computer, and the working frequency of each air compressor in the air compressor group is adjusted to ensure that the work can proceed normally, prevent insufficient flow supply from affecting production and causing economic losses, and prevent insufficient flow supply from causing safety hazards, thereby improving the reliability and economy of the system.

[0062] Furthermore, the calculation formula for the total output flow is:

[0063]

[0064] Where, Q is the total output flow; q 0i ,C i is the fitting function coefficient; X i is the air pipeline transmission distance of the i-th air compressor group; m is the total number of all air compressor groups.

[0065] Furthermore, the dynamic adjustment of the total flow required in the working area and the total output flow specifically includes: when the total output flow Q ≥ the total flow required in the working area Q′, the working efficiency of the air compressor group is reduced from far to low according to the distance between the air compressor group and the equipment working area; when the total output flow Q < the total flow required in the working area Q′, the working efficiency of the air compressor group is increased from near to far.

[0066] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for identifying the performance of a multi-air compressor group based on considering pipeline loss, characterized in that: The following steps are involved: S1, calculate the output effective flow of the current air compressor group; S2, calculating the total output flow of all the air compressor groups according to the output effective flow and the position information of all the air compressor groups; S3, obtain the total flow required in the working area; S4, dynamically adjusting according to the total flow required by the working area and the total output flow; The process of obtaining the output effective flow of the current air compressor group is as follows: Calculate the output effective flow of the current air compressor group according to the position information of each air compressor group in the current air compressor group and the output flow of each air compressor in the current air compressor group; The calculation formula for the output effective flow is: Where q i is the effective output flow of the i-th air compressor group; q 0j , c i，j is the fitting function coefficient; x i，j is the distance from the jth air compressor in the i-th air compressor group to the total air pipeline of the air compressor group; n is the total number of air compressors in the i-th air compressor group; The fitting function coefficient q 0j and the fitting function coefficient c i，j The acquisition process is: For each air compressor in the i-th air compressor group, monitor the first effective flow value of the distance from the j-th air compressor in the i-th air compressor group to the total air pipeline of the air compressor group, take the distance as the horizontal axis and the first effective flow value as the vertical axis, and obtain a first functional relationship expression between the first effective flow value of the air compressor and the distance through linear function fitting. According to the first functional relationship expression, obtain the fitting function coefficient q corresponding to each air compressor 0j and the fitting function coefficient c i，j ; The calculation formula for the total output flow is: Where, Q is the total output flow; q 0i , C i is the fitting function coefficient; X i is the gas pipeline transmission distance of the i-th air compressor group; m is the total number of all air compressor groups; The fitting function coefficient q 0i and the fitting function coefficient C i The acquisition process is: For each air compressor group, monitor the second effective flow value of the air pipeline transmission distance of the i-th air compressor group, take the transmission distance as the horizontal axis and the second effective flow value as the vertical axis, and obtain the second functional relationship expression between the second effective flow value of the air compressor and the transmission distance through linear function fitting. According to the second functional relationship expression, obtain the fitting function coefficient q corresponding to each air compressor. 0i and the fitting function coefficient C i .

2. The method for identifying the performance of a multi-air compressor group based on considering pipeline loss according to claim 1 is characterized in that: The dynamic adjustment in S4 includes: When the total output flow rate is greater than or equal to the total flow rate required by the working area, the working efficiency of the air compressor group is reduced in descending order according to the distance between the air compressor group and the equipment working area; When the total output flow rate is less than the total flow rate required by the working area, the working efficiency of the air compressor group is improved from near to far.

3. A multi-air compressor group performance identification system based on considering pipeline loss, the system is used to implement the multi-air compressor group performance identification method according to any one of claims 1-2, characterized in that: include: Computing module and control module; The computing module and the control module are wirelessly connected; The calculation module is used to calculate the output effective flow of the current air compressor group; It is also used to adjust the working efficiency of each air compressor; The control module is used to calculate the total output flow of all air compressor groups based on the output effective flow and the position information of all air compressor groups; it is also used to obtain the total flow required by the working area; and it is also used to perform dynamic adjustment based on the total flow required by the working area and the total output flow.

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