CN110390414B - Method and device for determining reference gas transmission and distribution capacity of pipe network - Google Patents
Method and device for determining reference gas transmission and distribution capacity of pipe network Download PDFInfo
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Abstract
The invention provides a method and a device for determining a pipe network reference gas transmission and distribution amount, wherein the method comprises the following steps: respectively acquiring actual values and design values of a plurality of evaluation factors of a plurality of stations and a plurality of pipelines of a pipe network under a preset working condition; calculating the operation load rate of each evaluation factor of each station and each pipeline under the preset working condition according to the actual value and the design value of each evaluation factor of each station and each pipeline under the preset working condition; calculating the comprehensive load rate of the evaluation factors of the pipe network under the preset working condition according to the operation load rate of the same evaluation factor of a plurality of stations or a plurality of pipelines under the preset working condition; calculating the dispersion and gas transmission capacity comprehensive index of the pipe network under the preset working condition according to the comprehensive load rate of a plurality of evaluation factors of the pipe network under the preset working condition; and determining the optimal working condition according to the dispersion and gas transmission capacity comprehensive indexes of the pipe network under a plurality of preset working conditions, and determining the reference gas transmission and distribution quantity of the pipe network as the operating quantity corresponding to the optimal working condition. The invention can quantitatively research the transmission and distribution gas quantity of the pipe network.
Description
Technical Field
The invention relates to the technical field of oil and gas transmission, in particular to a method and a device for determining a pipe network reference gas transmission and distribution amount.
Background
The gas transmission capacity of the pipe network is an important index in the natural gas transportation process. At present, certain research is carried out at home and abroad aiming at the gas transmission capacity of a natural gas pipeline network.
In the prior art, constraint conditions such as pipeline strength, node pressure and flow, operation management, emergency treatment and the like are considered in a research method for natural gas pipeline network transmission and distribution gas quantity, and the pipeline network transmission and distribution gas quantity is optimized.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
the research methods for the gas transmission and distribution of the pipe network provided by the prior art are qualitative evaluation of the gas transmission and distribution of the pipe network, and no method for quantitative research of the gas transmission and distribution of the pipe network exists at present.
Disclosure of Invention
In view of this, the present invention provides a method and an apparatus for determining a pipe network reference gas transmission and distribution capacity, so as to quantitatively research the pipe network gas transmission and distribution capacity.
Specifically, the method comprises the following technical scheme:
the invention provides a method for determining a pipe network reference gas transmission and distribution amount, which comprises the following steps:
respectively acquiring actual values and design values of a plurality of evaluation factors of a plurality of stations or pipelines of a pipe network under a plurality of preset working conditions;
calculating the operation load rate of each evaluation factor of each station or pipeline under each preset working condition according to the actual value and the design value of each evaluation factor of each station or pipeline under each preset working condition;
calculating the comprehensive load rate of the evaluation factor of the pipe network under each preset working condition according to the operation load rate of the same evaluation factor of the plurality of stations or pipelines under each preset working condition;
calculating the dispersion and gas transmission capacity comprehensive index of the pipe network under each preset working condition according to the comprehensive load rate of the multiple evaluation factors of the pipe network under each preset working condition;
and determining the optimal working condition according to the dispersion and gas transmission capacity comprehensive indexes of the pipe network under the plurality of preset working conditions, and determining the reference gas transmission and distribution quantity of the pipe network as the operating gas quantity corresponding to the optimal working condition.
Optionally, the operating load rate of each evaluation factor of each yard or pipeline under each preset condition is calculated according to the actual value and the design value of each evaluation factor of each yard or pipeline under each preset condition, and the calculation formula is as follows:
in the formula (I), the compound is shown in the specification,
αi,X,j-evaluation factor X of ith station or pipeline under jth preset working conditionkThe operating load factor of (c);
Xk actual i, j-evaluation factor X of ith station or pipeline under jth preset working conditionkThe actual value of (c);
Xk design i, j-evaluation factor X of ith station or pipeline under jth preset working conditionkDesign value of (c).
Optionally, the comprehensive load rate of the evaluation factor of the pipe network under each preset working condition is calculated according to the operation load rate of the same evaluation factor of the plurality of stations or pipes under each preset working condition, and the calculation formula adopted is as follows:
in the formula (I), the compound is shown in the specification,
n-the number of stations or pipes in the pipe network.
Optionally, the method includes calculating a dispersion and a gas transmission capacity comprehensive index of the pipe network under each preset working condition according to a comprehensive load rate of a plurality of evaluation factors of the pipe network under each preset working condition, where the calculation formula adopted for calculating the dispersion of the pipe network is as follows:
the calculation formula for calculating the gas transmission capacity comprehensive index is as follows:
in the formula (I), the compound is shown in the specification,
σj-dispersion of the pipe network under jth preset condition;
Hj-gas transmission capacity comprehensive index of the pipe network under jth preset working condition;
n-number of evaluation factors;
wXevaluation of factor XkThe operating load factor of (2).
Optionally, the plurality of evaluation factors includes yard pressure, yard throughput, pipeline gas transmission capacity, and pipeline gas storage capacity.
The invention also provides a device for determining the standard gas transmission and distribution capacity of the pipe network, which comprises:
the system comprises an acquisition module, a judgment module and a control module, wherein the acquisition module is used for respectively acquiring actual values and design values of a plurality of evaluation factors of a plurality of stations or pipelines of a pipe network under a plurality of preset working conditions;
the first calculation module is used for calculating the operation load rate of each evaluation factor of each station yard or pipeline under each preset working condition according to the actual value and the design value of each evaluation factor of each station yard or pipeline under each preset working condition;
the second calculation module is used for calculating the comprehensive load rate of the evaluation factor of the pipe network under each preset working condition according to the operation load rate of the same evaluation factor of the plurality of stations or pipelines under each preset working condition;
the third calculation module is used for calculating the dispersion and gas transmission capacity comprehensive index of the pipe network under each preset working condition according to the comprehensive load rate of the multiple evaluation factors of the pipe network under each preset working condition;
and the determining module is used for determining the optimal working condition according to the dispersion and gas transmission capacity comprehensive index of the pipe network under a plurality of preset working conditions, and determining the reference gas transmission and distribution capacity of the pipe network as the operating gas capacity corresponding to the optimal working condition.
Optionally, the calculation formula adopted by the first calculation module is as follows:
in the formula (I), the compound is shown in the specification,
αi,X,j-evaluation factor X of ith station or pipeline under jth preset working conditionkThe operating load factor of (c);
Xk actual i, j-evaluation factor X of ith station or pipeline under jth preset working conditionkThe actual value of (c);
Xk design i, j-evaluation factor X of ith station or pipeline under jth preset working conditionkDesign value of (c).
Optionally, the calculation formula adopted by the second calculation module is:
in the formula (I), the compound is shown in the specification,
n-the number of stations or pipes in the pipe network.
Optionally, the third calculating module calculates the dispersion of the pipe network by using a calculation formula as follows:
the calculation formula for calculating the gas transmission capacity comprehensive index is as follows:
in the formula (I), the compound is shown in the specification,
σj-dispersion of the pipe network under jth preset condition;
Hj-gas transmission capacity comprehensive index of the pipe network under jth preset working condition;
n-number of evaluation factors;
wXevaluation of factor XkWeight coefficient of running load factor of。
Optionally, the plurality of evaluation factors includes yard pressure, yard throughput, pipeline gas transmission capacity, and pipeline gas storage capacity.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
according to the method and the device for determining the standard gas transmission and distribution capacity of the pipe network, provided by the embodiment of the invention, the operation load rate of each station and pipeline under the preset working condition can be calculated according to the actual value and the design value of each evaluation factor of each station and pipeline under the preset working condition, so that the comprehensive load rate of each evaluation factor of the pipe network can be calculated, and further the dispersion and gas transmission capacity comprehensive index of the pipe network under the preset working condition can be calculated; and determining the reference transmission and distribution gas quantity of the pipe network according to the dispersion and gas transmission capacity comprehensive indexes of the pipe network under a plurality of preset working conditions. Therefore, the method for determining the pipe network reference gas transmission and distribution gas provided by the embodiment of the invention can determine the official network reference gas transmission and distribution and management and distribution and has important functions for planning pipe network construction and managing operation scheduling under a production and sales volume plan.
Drawings
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 flowchart of a method for determining a basic gas transmission and distribution capacity of a pipeline network according to an embodiment of the present invention;
fig. 2 is a block diagram of a device for determining a reference gas transmission and distribution amount of a pipeline network according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings.
The embodiment of the invention provides a method for determining a pipe network reference gas transmission and distribution amount, which comprises the steps 101 to 105 as shown in fig. 1. The steps will be specifically described below.
In step 101, actual values and design values of a plurality of evaluation factors of a plurality of stations or pipelines of a pipe network under a plurality of preset working conditions are respectively obtained.
In an embodiment of the invention, the pipe network may be a pipeline system for transporting natural gas. The pipe network includes a plurality of yards and a plurality of pipelines. The operation air quantity of the pipe network under the preset working condition is a constant value, and the pressure of each station and the pipeline all meet the requirements. The plurality of stations or pipelines means that the plurality of elements extracted from the pipe network comprise stations and pipelines, and each element can be a station or a pipeline.
The plurality of evaluation factors may be determined according to the actual conditions of the project and may include, for example, station pressure, station throughput, pipeline gas transmission capacity, and pipeline gas storage capacity. The present invention is not limited thereto and may include other evaluation factors.
The actual value of each evaluation factor is a measured value, and the design value is a value obtained by calculation according to the scale of the pipe network, an expected index and the like during the pipeline design. For example, the actual pressure at each site is a value detected by a meter at the site, and the design pressure at each site is a value calculated during pipe design.
In step 102, the operation load rate of each evaluation factor of each yard or pipeline under each preset condition is calculated according to the actual value and the design value of each evaluation factor of each yard or pipeline under each preset condition.
Specifically, the operation load rate of each evaluation factor of each station or pipeline under each preset working condition can be calculated by adopting the following formula:
in the formula (I), the compound is shown in the specification,
αi,X,j-evaluation factor X of ith station or pipeline under jth preset working conditionkThe operating load factor of (c);
Xk actual i, j-j preset operating conditionEvaluation factor X of ith station or pipelinekThe actual value of (c);
Xk design i, j-evaluation factor X of ith station or pipeline under jth preset working conditionkDesign value of (c).
For example, if the actual pressure of a certain station under the preset working condition is 3.84MPa and the design pressure of the station is 6MPa, the pressure load factor of the station can be obtained by using the above calculation formula to be 0.64.
When the plurality of evaluation factors comprise station pressure, station treatment capacity, pipeline gas transmission capacity and pipeline gas storage capacity, the pressure load rate of the station, the treatment capacity load rate of the station, the gas transmission capacity load rate of the pipeline and the gas storage capacity load rate of the pipeline of the pipe network under the preset working condition can be calculated respectively by adopting the formula. Specifically, the pressure load rate of the station yard is calculated according to the actual pressure and the design pressure of the station yard; calculating to obtain the processing load rate of the station yard according to the actual processing capacity and the design processing capacity of the station yard; calculating to obtain the gas transmission load rate of the pipeline according to the actual gas transmission rate and the designed gas transmission rate of the pipeline; and calculating the gas storage load rate of the pipeline according to the actual gas storage amount and the designed gas storage amount of the pipeline.
In step 103, according to the operation load rates of the same evaluation factor of a plurality of stations or pipelines under each preset working condition, the comprehensive load rate of the evaluation factor of the pipe network under each preset working condition is calculated.
In this step, the comprehensive load rate of the evaluation factors of the pipe network under each preset working condition can be calculated by adopting the following calculation formula:
in the formula (I), the compound is shown in the specification,
n-the number of stations or pipes in the pipe network.
The comprehensive load rate of each evaluation factor of the pipe network under each preset working condition can be calculated by adopting the formula. When the plurality of evaluation factors comprise station pressure, station treatment capacity, pipeline gas transmission capacity and pipeline gas storage capacity, the pressure comprehensive load rate, the treatment capacity comprehensive load rate, the gas transmission capacity comprehensive load rate and the gas storage capacity comprehensive load rate of the pipe network under the preset working condition can be respectively calculated.
In step 104, calculating a dispersion and gas transmission capacity comprehensive index of the pipe network under each preset working condition according to the comprehensive load rate of the multiple evaluation factors of the pipe network under each preset working condition.
In this step, the dispersion of the pipe network under each preset working condition can be calculated by adopting the following calculation formula:
in the formula (I), the compound is shown in the specification,
σj-dispersion of the pipe network under jth preset condition;
n-number of evaluation factors.
The dispersion of the pipe network under each preset working condition reflects the fluctuation condition between the operation load rates of the evaluation factors under the working condition, and the smaller the dispersion is, the smaller the fluctuation between the operation load rates of the evaluation factors is, and the more stable the operation of the pipe network is.
The gas transmission capacity comprehensive index of the pipe network under the preset working condition can be obtained by adopting the following calculation formula:
in the formula (I), the compound is shown in the specification,
Hj-gas transmission capacity comprehensive index of the pipe network under jth preset working condition;
n-number of evaluation factors;
wXevaluation of factor XkThe operating load factor of (2).
The comprehensive load rate K of the evaluation factor X of the pipe network under the jth preset working condition calculated in the step 103X,jAre normalized values of [0,1 ]]Within the range of (1). The comprehensive index H of the gas transmission capacity of the pipe network under the jth preset working condition obtained by calculation in the stepjAlso in the range of [0,1.0 ]]Within the range of (1), the gas transmission capacity comprehensive index H of the pipe network under the jth preset working condition can be obtainedjThe value of (2) is graded so as to distinguish the gas transmission capacity of the pipe network under different working conditions. For example, it can be divided into five levels, where H is dividedjHas a value of [0,0.2 ]]The gas transmission capacity of the pipe network is divided into low levels within the range of (1), which means that the operation load rate of the pipe network is very low, and the gas transmission capacity of the pipe network has a very large promotion space; h is to bejHas a value of [0.2,0.4 ]]The gas transmission capacity of the pipe network is divided into lower grades in the range of (1), which means that the operation load rate of the pipe network is lower, the operation load rate of an individual station or pipeline reaches 50%, and the gas transmission capacity of the pipe network has a large amount of lifting space; h is to bejHas a value of [0.4,0.6 ]]Of the pipe networkThe gas transmission capacity is divided into medium grades, which indicates that the operation load rate of the pipe network is medium, the operation load rate of part of stations or pipelines reaches 50 percent, the gas transmission capacity of the pipe network has a large lifting space, and the operation load rate of part of stations or pipelines has a large amount of lifting space; h is to bejHas a value of [0.6,0.8 ]]When the gas transmission capacity of the pipe network is divided into higher grades in the range of (1), the operation load rate of the pipe network is higher, the operation load rate of an individual station or pipeline reaches 80 percent and is close to full-load operation, the gas transmission capacity of the pipe network still has a certain lifting space, and the operation load rate of part of stations or pipelines has a larger lifting space; h is to bejHas a value of [0.8,1.0 ]]When the gas transmission capacity of the pipe network is divided into high grades, the operation load rate of the pipe network is high, the operation load rate of a station or a pipeline is generally higher than 80%, a part of stations or pipelines run at full load, and the overload of a particular station or pipeline occurs in Xining, so that the safe and stable operation of the pipe network is threatened by continuously improving the gas transmission capacity of the pipe network, and corresponding measures are required.
In step 105, according to the dispersion and gas transmission capability comprehensive index of the pipe network under a plurality of preset working conditions, the optimal working condition is determined, and the reference gas transmission and distribution quantity of the pipe network is determined to be the gas transmission quantity corresponding to the optimal working condition.
In the embodiment of the invention, the optimal working condition is determined by comprehensively considering the dispersion of the pipe network and the comprehensive index of the gas transmission capacity under a plurality of preset working conditions, for example, the optimal working condition can be the working condition with the minimum dispersion and the maximum comprehensive index of the gas transmission capacity. And if the gas transmission capacity comprehensive index corresponding to the working condition with the minimum dispersion is not the maximum, comprehensively considering the dispersion and the gas transmission capacity comprehensive index, and selecting the working condition with smaller dispersion and larger gas transmission capacity comprehensive index as the optimal working condition.
Therefore, the method determines the reference gas transmission and distribution capacity of the pipe network as the gas transmission capacity corresponding to the optimal working condition, so that the fluctuation among the operation load rates of all evaluation factors of the pipe network is small, the operation of the pipe network is stable, and the comprehensive index of the gas transmission capacity of the pipe network is large.
According to the method for determining the standard gas transmission and distribution capacity of the pipe network, provided by the embodiment of the invention, the operation load rate of each station and pipeline under each preset working condition can be calculated according to the actual value and the design value of each evaluation factor of each station or pipeline under each preset working condition, so that the comprehensive load rate of each evaluation factor of the pipe network can be calculated, and the dispersion and gas transmission capacity comprehensive index of the pipe network under each preset working condition can be further calculated; and determining the reference transmission and distribution gas quantity of the pipe network according to the dispersion and gas transmission capacity comprehensive indexes of the pipe network under a plurality of preset working conditions. Therefore, the method for determining the pipe network reference gas transmission and distribution gas provided by the embodiment of the invention can determine the official network reference gas transmission and distribution and management and distribution and has important functions for planning pipe network construction and managing operation scheduling under a production and sales volume plan.
The invention also provides a specific application embodiment of the method for determining the pipe network reference gas transmission and distribution capacity. The method is applied to a pipe network system consisting of 47 pipelines and 116 stations. Seven working conditions are set in total by comprehensively considering the production and sales plan and the market development situation of each region, as shown in the following table 1.
TABLE 1 pipe network operation gas volume under different working conditions
| Working conditions | Working condition 1 | Working condition 2 | Working condition 3 | Working condition 4 | Working condition 5 | Working condition 6 | Operating mode 7 |
| Running gas (Wanfang/Tian) | 5600 | 6100 | 6600 | 6800 | 6900 | 7000 | 7100 |
Under each working condition, important stations and pipelines are provided with pressure control conditions for protecting production of gas fields, users and safety of pipelines.
And (4) obtaining that partial stations and pipelines can not meet the pressure control condition under the working conditions of 6 and 7 through calculation, and therefore, only the gas transmission capacity of the pipe network is evaluated under the working conditions of 1-5.
The method provided by the invention is adopted to calculate and obtain the operation load rate of each evaluation factor, the gas transmission capacity comprehensive index of the pipe network and the dispersion of the pipe network under different working conditions, wherein when the gas transmission capacity comprehensive index of the pipe network is calculated, the pressure load rate, the processing load rate, the gas transmission capacity load rate and the pipeline gas storage capacity load rate of the pipe network are respectively 25%. The specific calculation results are shown in table 2.
TABLE 2 evaluation results of gas transmission capacity of pipe network under different working conditions
| Index (I) | Working condition 1 | Working condition 2 | Working condition 3 | Working condition 4 | Working condition 5 |
| Rate of pressure load | 0.64 | 0.65 | 0.69 | 0.71 | 0.79 |
| Throughput load rate | 0.57 | 0.68 | 0.69 | 0.77 | 0.81 |
| Load factor of gas delivery volume | 0.68 | 0.70 | 0.74 | 0.79 | 0.82 |
| Load factor of pipeline storage capacity | 0.69 | 0.71 | 0.73 | 0.77 | 0.82 |
| Comprehensive index of gas transmission capacity | 0.66 | 0.69 | 0.72 | 0.77 | 0.80 |
| Dispersion of | 0.04 | 0.06 | 0.07 | 0.08 | 0.01 |
As can be seen from Table 2, the dispersion of the pipe network under the working condition 5 is the highest, and the comprehensive index of the gas transmission capacity is the largest, so that the working condition 5 can be determined to be the best working condition, and further the reference gas transmission capacity of the pipe network can be determined to be 6900 ten thousand square/day.
Corresponding to the method for determining the pipe network reference gas transmission and distribution amount, an embodiment of the present invention further provides a device for determining the pipe network reference gas transmission and distribution amount, where as shown in fig. 2, the device includes:
the acquiring module 201 is configured to acquire actual values and design values of a plurality of evaluation factors of a plurality of stations or pipelines of a pipe network under a plurality of preset working conditions, respectively;
the first calculating module 202 is configured to calculate an operation load rate of each evaluation factor of each yard or pipeline under each preset working condition according to an actual value and a design value of each evaluation factor of each yard or pipeline under each preset working condition;
the second calculating module 203 is configured to calculate, according to the operation load rate of the same evaluation factor of the plurality of yards or pipelines under each preset working condition, a comprehensive load rate of the evaluation factor of the pipe network under each preset working condition;
the third calculating module 204 is configured to calculate a dispersion and a gas transmission capacity comprehensive index of the pipe network under each preset working condition according to a comprehensive load rate of the multiple evaluation factors of the pipe network under each preset working condition;
the determining module 205 is configured to determine an optimal working condition according to the dispersion and the gas transmission capability comprehensive index of the pipe network under multiple preset working conditions, and determine the network management reference gas transmission and distribution quantity as an operating gas quantity corresponding to the optimal working condition.
Optionally, the calculation formula adopted by the first calculation module 202 is:
in the formula (I), the compound is shown in the specification,
αi,X,j-evaluation factor X of ith station or pipeline under jth preset working conditionkThe operating load factor of (c);
Xk actual i, j-evaluation factor X of ith station or pipeline under jth preset working conditionkThe actual value of (c);
Xk design i, j-evaluation factor X of ith station or pipeline under jth preset working conditionkDesign value of (c).
Optionally, the calculation formula adopted by the second calculation module 203 is:
in the formula (I), the compound is shown in the specification,
n-the number of stations or pipes in the pipe network.
Optionally, the third calculating module 204 calculates the dispersion of the pipe network by using a calculation formula as follows:
the calculation formula for calculating the gas transmission capacity comprehensive index is as follows:
in the formula (I), the compound is shown in the specification,
σj-dispersion of the pipe network under jth preset condition;
Hj-gas transmission capacity comprehensive index of the pipe network under jth preset working condition;
n-number of evaluation factors;
wXevaluation of factor XkThe operating load factor of (2).
Optionally, the plurality of evaluation factors includes yard pressure, yard throughput, pipeline gas transmission capacity, and pipeline gas storage capacity.
Since the device embodiment and the method embodiment correspond to each other, the beneficial effects that can be brought are the same, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the method and apparatus provided are merely illustrative, for example, the division of the steps and modules is only one logical function division, and other division manners may be available in actual implementation. The method and the device can be realized by running corresponding software and hardware through a computer device. The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A method for determining the standard gas transmission and distribution amount of a pipe network is characterized by comprising the following steps:
respectively acquiring actual values and design values of a plurality of evaluation factors of a plurality of stations or pipelines of a pipe network under a plurality of preset working conditions;
calculating the operation load rate of each evaluation factor of each station and each pipeline under each preset working condition according to the actual value and the design value of each evaluation factor of each station or each pipeline under each preset working condition;
calculating the comprehensive load rate of the evaluation factor of the pipe network under each preset working condition according to the operation load rate of the same evaluation factor of the plurality of stations or pipelines under each preset working condition;
calculating the dispersion and gas transmission capacity comprehensive index of the pipe network under each preset working condition according to the comprehensive load rate of the multiple evaluation factors of the pipe network under each preset working condition;
determining an optimal working condition according to the dispersion and gas transmission capacity comprehensive index of the pipe network under the multiple preset working conditions, and determining the reference gas transmission and distribution quantity of the pipe network as an operation quantity corresponding to the optimal working condition;
the method comprises the following steps of calculating the operation load rate of each evaluation factor of each station and each pipeline under each preset working condition according to the actual value and the design value of each evaluation factor of each station or each pipeline under each preset working condition, wherein the calculation formula is as follows:
in the formula (I), the compound is shown in the specification,
Xk actual i, j-evaluation factor X of ith station or pipeline under jth preset working conditionkThe actual value of (c);
Xk design i, j-evaluation factor X of ith station or pipeline under jth preset working conditionkA design value of (d);
and calculating the comprehensive load rate of the same evaluation factor of the plurality of stations or pipelines under each preset working condition according to the operation load rate of the same evaluation factor of the plurality of stations or pipelines under each preset working condition, wherein the adopted calculation formula is as follows:
in the formula (I), the compound is shown in the specification,
n-the number of stations or pipes in the pipe network;
the calculation formula for calculating the dispersion of the pipe network is as follows:
the calculation formula for calculating the gas transmission capacity comprehensive index is as follows:
in the formula (I), the compound is shown in the specification,
σj-dispersion of the pipe network under jth preset condition;
Hj-gas transmission capacity comprehensive index of the pipe network under jth preset working condition;
n-number of evaluation factors;
2. The method for determining the pipe network reference gas transmission and distribution capacity according to claim 1, wherein the plurality of evaluation factors include station pressure, station throughput, pipeline gas transmission capacity, and pipeline gas storage capacity.
3. A device for determining the reference gas transmission and distribution capacity of a pipe network is characterized by comprising:
the system comprises an acquisition module, a judgment module and a control module, wherein the acquisition module is used for respectively acquiring actual values and design values of a plurality of evaluation factors of a plurality of stations or pipelines of a pipe network under a plurality of preset working conditions;
the first calculation module is used for calculating the operation load rate of each evaluation factor of each station and each pipeline under each preset working condition according to the actual value and the design value of each evaluation factor of each station or each pipeline under each preset working condition;
the second calculation module is used for calculating the comprehensive load rate of the evaluation factor of the pipe network under each preset working condition according to the operation load rate of the same evaluation factor of the plurality of stations or pipelines under each preset working condition;
the third calculation module is used for calculating the dispersion and gas transmission capacity comprehensive index of the pipe network under each preset working condition according to the comprehensive load rate of the multiple evaluation factors of the pipe network under each preset working condition;
the determining module is used for determining the optimal working condition according to the dispersion and gas transmission capacity comprehensive index of the pipe network under a plurality of preset working conditions, and determining the reference gas transmission and distribution capacity of the pipe network as the operating gas capacity corresponding to the optimal working condition;
the first calculation module adopts a calculation formula as follows:
in the formula (I), the compound is shown in the specification,
Xk actual i, j-evaluation factor X of ith station or pipeline under jth preset working conditionkThe actual value of (c);
Xk design i, j-evaluation factor X of ith station or pipeline under jth preset working conditionkA design value of (d);
the second calculation module adopts the calculation formula as follows:
in the formula (I), the compound is shown in the specification,
n-the number of stations or pipes in the pipe network;
the third calculation module calculates the dispersion of the pipe network by adopting a calculation formula as follows:
the calculation formula for calculating the gas transmission capacity comprehensive index is as follows:
in the formula (I), the compound is shown in the specification,
σj-dispersion of the pipe network under jth preset condition;
Hj-gas transmission capacity comprehensive index of the pipe network under jth preset working condition;
n-number of evaluation factors;
4. The apparatus for determining the pipe network reference gas transmission and distribution capacity according to claim 3, wherein the plurality of evaluation factors include station pressure, station throughput, pipeline gas transmission capacity, and pipeline gas storage capacity.
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| CN106382466A (en) * | 2016-12-14 | 2017-02-08 | 中国石油天然气集团公司 | Gas conveying pipeline metering and pressure adjusting device and method |
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