CN109492841B - Method and device for determining emergency allocation capacity of pipeline - Google Patents
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Abstract
The invention discloses a method for determining emergency allocation capacity of a pipeline, and belongs to the field of pipelines. The method comprises the following steps: judging whether the variation amplitude value of the pipe network facility is larger than or equal to a preset value within a preset time range, if so, disconnecting the pipeline corresponding to a fluid source access point or a user use point which has the largest influence according to the existing pipe network operation data, acquiring the increased air volume of other pipelines in the pipe network, and taking the increased air volume as the emergency allocation capacity of the pipe network; if not, according to the historical operation data of the pipe network, recording the value of the gas shortage quantity, which is more than 10% of the normal operation gas quantity of the pipe network, of the pipe network operation gas shortage quantity when the abnormal condition actually occurs in the preset time range, and taking the maximum value of the gas shortage quantity as the emergency allocation capacity of the pipe network. The method determines the emergency allocation capacity of the pipe network according to historical actual data or the existing pipe network implementation condition by judging the change condition of the actual pipe network.
Description
Technical Field
The invention relates to the field of pipelines, in particular to a method and a device for determining emergency allocation capacity of a pipeline.
Background
With the popularization of pipelines, fluids such as water, gas, oil and the like are transmitted to various users through a single pipeline or a complex pipeline. In order to cope with sudden temporary faults occurring at a natural gas production end, a transmission pipeline, a user end and the like and reduce the influence on natural gas production and user supply, a reserved part of surplus transmission capacity, namely emergency allocation capacity, is required. Therefore, the determination of the emergency dispatching capacity has great significance for the management control and perfection of the pipeline.
The method for determining the emergency allocation capacity of the pipeline in the prior art comprises the following steps: and simultaneously determining the emergency dispatching capacity and the peak regulation capacity according to a value obtained by multiplying the ratio of the actual delivery capacity of the pipeline to the planned delivery capacity by a safety experience coefficient, wherein the obtained value is the sum of the emergency dispatching capacity and the peak regulation capacity. The peak shaving capacity refers to the surplus delivery capacity which needs to be reserved in order to meet the demand fluctuation of the user terminal in different time periods. In the prior art, the emergency dispatching capacity and the peak regulation capacity of a pipeline are not distinguished, and the sum of the emergency dispatching capacity and the peak regulation capacity is directly obtained.
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:
the emergency dispatching capacity and the peak regulation capacity of the pipeline are not distinguished, and the method for directly obtaining the sum of the emergency dispatching capacity and the peak regulation capacity in the prior art is only suitable for the condition of a single pipeline, but is not suitable for the condition that the number of pipelines, branch lines and pressure control points in a complex pipeline is large and the mutual supplement among regional pipelines can be realized.
Disclosure of Invention
In order to solve the above problems in the prior art, an embodiment of the present invention provides a method for determining an emergency deployment capability of a pipeline. The technical scheme is as follows:
there is provided a method of determining emergency deployment capability of a pipeline, the method comprising:
judging whether the variation amplitude value of the pipe network facility in the preset time range is larger than or equal to a preset value,
if so, acquiring a fluid source access point or a user use point which has the largest influence according to the existing pipe network operation data, disconnecting the pipeline corresponding to the fluid source access point or the user use point which has the largest influence, acquiring the increased air volume of other pipelines in the pipe network, and taking the increased air volume as the emergency allocation capacity of the pipe network;
if not, recording the value of the gas shortage amount which is more than 10% of the normal operation gas amount of the pipe network and appears when the abnormal condition actually occurs in the preset time range according to the historical operation data of the pipe network, and taking the maximum value in the gas shortage amount as the emergency allocation capacity of the pipe network.
Preferably, said preset time range is comprised within 1-3 years.
Preferably, the variation amplitude value of the pipe network facility comprises a variation value of total air intake amount of a fluid source access point, a variation value of total air consumption amount of a user use point and a variation value of pipe diameter of a newly-built pipe.
Preferably, whether the value of the amplitude of change of the pipe network facility is greater than or equal to a preset value specifically is: the change value of the total air intake quantity of the fluid source access point is greater than or equal to 50 ten thousand square per day, the change value of the total air consumption quantity of the user use point is greater than or equal to 50 ten thousand square per day, and the change value of the pipeline diameter of the newly-built pipeline is greater than or equal to 200 mm.
Preferably, the most influential point of fluid source access or point of user use comprises:
the fluid source access point with the maximum air intake quantity or the user use point with the maximum air consumption quantity.
Preferably, the pipeline corresponding to the fluid source access point or the user use point which has the largest influence is disconnected to obtain the increased gas volume of the rest pipelines in the pipeline network, specifically:
acquiring a first pressure boundary condition value of a key fluid source access point in the pipe network according to the basic parameters of the pipe network, wherein the number of the key fluid source access points is at least one, acquiring a second pressure boundary condition value of a key user use point in the pipe network, the number of the key user use points is at least one,
disconnecting all pipelines connected with the fluid source access point with the largest influence, increasing the air input of the rest fluid source access points which do not reach the upper limit value under the condition of meeting the first pressure boundary value and the second pressure boundary value, and obtaining the increased air volume of the rest pipelines in the pipe network,
or disconnecting the pipeline with the largest diameter in the pipelines connected with the user using point with the largest influence, and acquiring the increased gas amount of the rest pipelines in the pipeline network under the condition of meeting the first pressure boundary value and the second pressure boundary value.
Preferably, the historical operation data of the pipe network comprises actual operation data of the pipe network within about 1 to 3 years.
Preferably, the operation gas shortage amount of the pipe network reaches more than 10% of the normal operation gas amount of the pipe network, and specifically comprises the following steps:
the operating gas shortage amount of the pipe network reaches 10-50% of the normal operating gas amount of the pipe network.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the emergency dispatching capacity of the pipe network is determined independently according to historical actual data or the existing pipe network implementation situation, and the problem that the method for determining the emergency dispatching capacity of the pipe network in the prior art is only suitable for a single pipeline but not suitable for the situation of a complex pipeline (namely the pipe network) is solved.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for determining emergency deployment capability of a pipeline provided by the present invention;
fig. 2 is a schematic diagram of a fluid source access point and a user use point in a pipe network provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below.
The embodiment of the invention provides a method for determining emergency allocation capacity of a pipeline, which comprises the following steps:
judging whether the variation amplitude value of the pipe network facility in the preset time range is larger than or equal to a preset value,
if so, acquiring a fluid source access point or a user use point which has the largest influence according to the existing pipe network operation data, disconnecting the pipeline corresponding to the fluid source access point or the user use point which has the largest influence, acquiring the increased air volume of other pipelines in the pipe network, and taking the increased air volume as the emergency allocation capacity of the pipe network;
if not, recording the value of the gas shortage amount which is more than 10% of the normal operation gas amount of the pipe network and appears when the abnormal condition actually occurs in the preset time range according to the historical operation data of the pipe network, and taking the maximum value in the gas shortage amount as the emergency allocation capacity of the pipe network.
The embodiment of the invention judges whether the pipe network facilities can adopt the pipe network data recorded in the history by judging whether the change amplitude value of the pipe network facilities is larger than or equal to the preset value in the preset time range. The variable amplitude value of the pipe network facility comprises the number of fluid source access points or user use points, the air volume of the fluid source access points or the user use points, the number of pipelines and the like. Accordingly, whether the variation amplitude value is greater than or equal to the preset value includes whether the number of the fluid source access points or the user use points is increased or decreased to the preset value, whether the amount of the air of the fluid source access points or the user use points is increased or decreased to the preset value, and whether the number of the pipelines is increased or decreased to the preset value. When the change amplitude value of the pipe network facility within the preset time range is smaller than the preset value, the pipe network data recorded in the history practice can be adopted for recording, the air shortage amount when the abnormal condition actually occurs is obtained, and the maximum value in the air shortage amount is used as the emergency allocation capacity of the pipe network. When the value of the amplitude of change of the pipe network facility within the preset time range is equal to or greater than the preset value, it is indicated that the change of the pipe network facility cannot determine the emergency deployment capability according to the pipe network data recorded in the history practice, and a fluid source access point or a user use point with the largest influence should be obtained under the condition of the existing practical pipe network facility, that is, once an abnormal condition occurs, a pipeline corresponding to the fluid source access point or the user use point is blocked, the influence on other pipelines in the pipe network is the largest, the dispersed and increased gas volume of the other pipelines is caused to be the largest, and the increased gas volume is used as the emergency deployment capability of the pipe network.
Therefore, the method and the device for determining the emergency dispatching capacity of the pipe network independently determine the emergency dispatching capacity of the pipe network according to historical actual data or the existing pipe network implementation situation, and solve the problem that the method for determining the emergency dispatching capacity of the pipe network in the prior art is only suitable for a single pipeline but not suitable for the situation of a complex pipeline (namely the pipe network).
Wherein the preset time range is within 1-3 years. Preferably, the preset time can be selected to be 2 years, that is, whether the change of the pipe network facilities exceeds the preset value within 2 years is judged, for example, larger users are added, new gas wells are developed, and the like.
The change amplitude value of the pipe network facility comprises a change value of the total air inflow of a fluid source access point, a change value of the total air consumption of a user use point and a change value of the diameter of a newly-built pipeline. The three parameters are taken as the basis for judgment, and the change of the three parameters can represent the change of other parameters, such as the change of the number of the fluid source access points or the user use points, namely the change of the total air intake quantity of the fluid source access points or the total air consumption quantity of the user use points.
Further, whether the value of the amplitude of change of the pipe network facility is greater than or equal to a preset value specifically is as follows: the change value of the total air intake amount of the fluid source access point is greater than or equal to 50 ten thousand square per day, the change value of the total air consumption amount of the user use point is greater than or equal to 50 ten thousand square per day, the change value of the diameter of the pipeline of the newly-built pipeline is greater than or equal to 200mm, preferably 400mm, taking a purified gas pipeline network managed by oil and gas field division in southwest as an example, the diameter of a main pipeline is 400 plus 1000mm, and the diameter of a branch pipeline is 50-400mm, so that the preset value of the newly-built pipeline is mainly determined by the diameter of the main pipeline for a purified gas pipeline network managed by the oil and gas field division in southwest, and the preset value of the newly-built pipeline can be determined by distinguishing the main pipeline and the branch pipeline for different pipelines in different regions. The total intake air amount of the fluid source access points or the total air consumption of the user use points refers to the sum of the total intake air amounts of all the fluid source access points or the total air consumption of all the user use points.
The most influential fluid source access point or user point of use includes: the fluid source access point with the maximum air intake quantity or the user use point with the maximum air consumption quantity. The pipeline corresponding to the fluid source access point or the user use point with the largest influence is disconnected, and the increased air volume of the rest pipelines in the pipeline network is obtained, specifically:
and acquiring a first pressure boundary condition value of a key fluid source access point in the pipe network according to the basic parameters of the pipe network, wherein the number of the key fluid source access points is at least one, and acquiring a second pressure boundary condition value of a key user use point in the pipe network, and the number of the key user use points is at least one. The key fluid source access point and the key user use point are used for controlling the pressure of the key fluid source access point and the pressure of the key user use point, so that the pressure of other fluid source access points and the pressure of other user use points in a pipe network can be controlled. The first pressure boundary condition value of the key fluid source access point is the highest pressure boundary value which is obtained based on the consideration of the safety of the pipe network and meets the safety of the pipe network, and the second pressure boundary condition value of the key user use point is the lowest pressure boundary value which can meet the basic production of the pipe network and meet the requirements of users based on the pipe network, namely, a feasible pressure range of the pipe network is formed in advance.
And then comparing the numerical values of the fluid source access point with the maximum air inflow or the user use point with the maximum air consumption, if the numerical value is the fluid source access point with the maximum air inflow, disconnecting all pipelines connected with the fluid source access point with the maximum influence, and increasing the air inflow of the rest fluid source access points which do not reach the upper limit value under the condition of meeting the first pressure boundary value and the second pressure boundary value to obtain the increased air quantity of the rest pipelines in the pipe network, wherein the fluid source access point which does not reach the upper limit value refers to the upper limit value of the safe production of the gas well connected with the fluid source access point. The reason why the gas quantity needs to be increased under the condition that the first pressure boundary value and the second pressure boundary value are met is that the gas quantity needs to be increased under the pressure value which can be borne by a pipe network and under the condition that the requirement of a user can be guaranteed, and once the fluid source inlet point is abnormal, the worst condition that no gas can be output from the fluid source inlet point can be caused. Therefore, in the embodiment of the invention, all pipelines connected with the fluid source inlet point are disconnected, and the simulation calculation is carried out to obtain the gas quantity added by the rest pipelines.
If the numerical value is larger than the user use point with the largest gas consumption, disconnecting the pipeline with the largest diameter in the pipelines connected with the user use point with the largest influence, and acquiring the gas consumption increased by the rest pipelines in the pipeline network under the condition of meeting the first pressure boundary value and the second pressure boundary value. Here, since the gas input of the user use point is input from different fluid source access points through a plurality of pipes in a normal condition, the abnormal condition of the user use point means that the pipe accessing the user use point is broken or damaged, and the probability that all the pipes accessing the user use point are broken or damaged is very small. Therefore, in the embodiment of the present invention, the pipeline with the largest diameter in the pipelines connected to the user use point with the largest influence is disconnected, and a simulation calculation is performed to obtain the amount of air added to the remaining pipelines, but this is not specifically limited in the embodiment of the present invention, and for example, all the pipelines connected to the user use point with the largest influence may be disconnected, that is, when all the pipelines introduced to the user use point are broken or damaged.
It will be understood by those skilled in the art that the above-mentioned steps of obtaining the first pressure boundary condition value, obtaining the second pressure boundary condition value, and performing the simulation calculation refer to a simulation calculation process implemented by a terminal such as a computer with pipeline simulation software, for example, TGNET.
In the above-described embodiment, the historical operation data of the pipe network includes actual operation data of the pipe network in approximately 1 to 3 years. The gas shortage amount in the operation of the pipe network reaches more than 10% of the normal operation gas amount of the pipe network, and specifically comprises the following steps: the operating gas shortage amount of the pipe network reaches 10-50% of the normal operating gas amount of the pipe network.
The following further describes how to determine the emergency deployment capability of the pipe network by using specific embodiments.
Example one
As shown in fig. 2, A, C, D, E, F points in the pipe network are used as fluid source access points, B, M, N, H points are used as user use points, wherein H point is a newly increased user use point within the 1 year. 1 user use point H is added in the pipe network, so that the total gas consumption of the user use points is increased by 30 ten thousand square/day. But the change value of the total air input of a fluid source access point of a pipe network and the change value of the total air consumption of a user use point are both smaller than 50 ten thousand square per day, and the diameter of the pipeline of the newly-built pipeline is within 200 mm. Therefore, the value of the variation amplitude of the pipe network facility is judged to be smaller than the preset value within 1 year.
According to the historical operation data of the pipe network, two times of abnormal conditions are recorded within the 1 year, the first abnormal condition is that a certain pipe with the diameter larger than 200mm of one user using point is broken, and the second abnormal condition is that one fluid source passing point is abnormal. When the two abnormal conditions occur, the running gas shortage amount of the pipe network reaches more than 10% of the normal running gas amount of the pipe network, the gas shortage amount caused by the first abnormal condition is 800 ten thousand square/day, and the gas shortage amount caused by the second abnormal condition is 1000 ten thousand square/day, so that the value of the gas shortage amount caused by the second abnormal condition is used as the emergency allocation capacity of the pipe network, namely 1000 ten thousand square/day.
Example two
As shown in fig. 2, A, C, D, E, F points in the pipe network are used as fluid source access points, B, M, N, H points are used as user use points, and N, H points are newly added user use points within the 1 year. The pipe network is not specifically limited to this, and as can be understood by those skilled in the art, for an urban pipe network, the arrangement of the pipes in the pipe network is complex, a plurality of fluid source access points are connected to a plurality of user use points, and fig. 2 is a schematic diagram of the pipe network.
Within 1 year, 2 user use points N, H are added in the pipe network, so that the total gas consumption of the user use points is increased by 60 ten thousand square/day. Therefore, the value of the change amplitude of the pipe network facility is judged to be larger than the preset value within 1 year.
According to the existing pipe network operation data, the air inflow of a fluid source access point A is 600 ten thousand square per day, the air inflow of the point A is the maximum value of all fluid source access points A, C, D, E, F, the air consumption of a user access point B is 500 ten thousand square per day, and the air inflow of the point B is the maximum value of all user access points B, M, N, H. Therefore, comparing the values at points a and B reveals that the value of the source inlet point a is larger, taking it as the source inlet point with the greatest effect, disconnecting all the pipes connected to point a, and increasing the intake air amount to the remaining source inlet point C, D, E, but not increasing the intake air amount to point F, because the intake air amount at point F has reached its upper limit. And then, acquiring the increased air volume of the rest pipelines as 1200 ten thousand square/day, and taking the increased air volume as the emergency deployment capacity of the pipe network.
EXAMPLE III
Referring to fig. 2, A, C, D, E, F points in the pipe network are used as fluid source access points, B, M, N, H points are used as user use points, wherein N points are newly added user use points within the 1 year. Within 1 year, 1 user use point N is added in the pipe network, so that the total gas consumption of the user use points is increased by 60 ten thousand square/day. Therefore, the value of the change amplitude of the pipe network facility is judged to be larger than the preset value within 1 year.
According to the existing pipe network operation data, the air inflow of a fluid source access point D is 400 ten-thousandths per day, the air inflow of the point D is the maximum value of all fluid source access points, the air consumption of a user use point M is 500 ten-thousandths per day, and the air inflow of the point M is the maximum value of all user use points. Therefore, comparing the values of the points D and M, the user use point M is found to have a larger value and is set as the user use point having the greatest influence. And disconnecting the pipeline pipe 1 with the largest diameter connected with the M point, wherein the diameter of the pipe 1 is 400mm, the gas quantity added by the rest pipelines is 900 ten thousand square/day, and the obtained gas quantity is used as the emergency allocation capacity of the pipe network.
All the above optional technical solutions may be combined arbitrarily to form the optional embodiments of the present disclosure, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A method of determining emergency dispatch capabilities of a pipeline, the method comprising:
judging whether the variation amplitude value of the pipe network facility in a preset time range is larger than or equal to a preset value or not;
if so, determining a fluid source access point or a user use point which has the largest influence when the existing pipe network has an abnormal condition according to the operation data of the existing pipe network, determining the increased air volume of the rest of pipes in the pipe network when the pipe corresponding to the fluid source access point or the user use point which has the largest influence is disconnected, and taking the increased air volume as the emergency allocation capacity of the pipe network;
if not, recording at least one value of the gas shortage quantity, which is more than 10% of the normal operation gas quantity of the pipe network, of the pipe network operation gas shortage quantity which actually occurs when an abnormal condition occurs in the preset time range according to the historical operation data of the pipe network, and taking the maximum value of the at least one value of the gas shortage quantity as the emergency allocation capacity of the pipe network;
and the emergency allocation capacity of the pipe network is used for representing the gas quantity which needs to be increased except for the gas quantity which meets normal supply.
2. The method according to claim 1, wherein the preset time range comprises within 1-3 years.
3. The method of claim 1, wherein the values of variation in the grid facilities include a variation in total intake air flow to points of fluid supply, a variation in total gas usage to points of user use, and a variation in pipe diameter of newly constructed pipes.
4. The method according to claim 3, wherein whether the value of the variation amplitude of the pipe network facility is greater than or equal to a preset value is specifically: the change value of the total air intake quantity of the fluid source access point is greater than or equal to 50 ten thousand square per day, the change value of the total air consumption quantity of the user use point is greater than or equal to 50 ten thousand square per day, and the change value of the pipeline diameter of the newly-built pipeline is greater than or equal to 200 mm.
5. The method of claim 1, wherein the most influential point of fluid source access or user use comprises:
the fluid source access point with the maximum air intake quantity or the user use point with the maximum air consumption quantity.
6. The method according to claim 1, wherein the amount of gas added to the remaining pipes in the pipe network when the pipe corresponding to the fluid source access point or the user use point which has the largest influence is determined to be disconnected is specifically:
acquiring a first pressure boundary condition value of a key fluid source access point in the pipe network according to the basic parameters of the pipe network, wherein the number of the key fluid source access points is at least one, acquiring a second pressure boundary condition value of a key user use point in the pipe network, the number of the key user use points is at least one,
when all pipelines connected with the fluid source access point with the largest influence are disconnected, determining to increase the air input of the rest fluid source access points which do not reach the upper limit value under the condition of meeting the first pressure boundary value and the second pressure boundary value, and acquiring the increased air volume of the rest pipelines in the pipe network,
or when the pipeline with the largest diameter in the pipelines connected with the user using point with the largest influence is disconnected, acquiring the increased air volume of the rest pipelines in the pipe network under the condition of meeting the first pressure boundary value and the second pressure boundary value.
7. The method of claim 1, wherein said historical operational data for pipe network comprises actual operational data for pipe network for approximately 1-3 years.
8. The method according to claim 1, wherein the operating gas deficiency of the pipe network reaches more than 10% of the normal operating gas of the pipe network, specifically:
the operating gas shortage amount of the pipe network reaches 10-50% of the normal operating gas amount of the pipe network.
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