A gas pipeline network transmission difference analysis method and gas management system

Abstract

The present application discloses a gas management system, which is applied to the transmission difference analysis of pipeline gas. The gas management system includes: a collection module, including several monitoring devices, the collection module is configured to collect the gas flow of the monitoring nodes of the gate station and the gas network and the gas tank inventory of each gas storage station in the gas network; a control module, which is used to configure and send collection rules to the collection module, so that each monitoring device of the collection module is configured according to the collection rules, and the collection rules include: time calibration of the monitoring equipment, sampling frequency setting and transmission frequency setting of the sampling data; a processing module, which is configured to: perform pipeline gas transmission difference analysis based on the transmission difference calculation factor, and the transmission difference calculation factor includes: gas flow, construction gas flow, gas tank inventory before and after the specified time interval, and gas pipeline inventory. The present application can realize the time alignment of the collected gas volume data, and thus can realize the gas transmission difference analysis.

Description

Technical Field

[0001] The present application relates to the field of urban gas pipeline networks, and in particular to a gas pipeline network transmission difference analysis method and a gas management system. Background Art

[0002] In the existing transmission difference calculation method, the transmission difference is mostly calculated based on the total gas purchase volume in the time interval, the total gas consumption of period users and the difference in pipeline gas volume at the beginning and end of the period. The calculation result of the transmission difference is affected by the gas output volume, pipeline storage volume and gas flow volume. Due to the huge number of urban gas consumption nodes, especially in residential metering equipment, it is only suitable for gas billing scenarios and is not suitable for use as a transmission difference analysis. Factors such as its metering accuracy and collection frequency make it difficult for the collected gas flow data to support accurate transmission difference calculation and analysis. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, this application adopts the following technical solutions:

[0004] In a first aspect, the present application provides a gas management system, which is applied to pipeline gas transmission difference analysis, and the gas management system includes:

[0005] A collection module, the collection module includes a number of monitoring devices, and the collection module is configured to collect the gas flow of the gate station and the monitoring nodes of the gas pipeline network and the gas tank inventory of each gas storage station in the gas pipeline network;

[0006] A control module, the control module is used to configure and send collection rules to the collection module, so that each monitoring device of the collection module is configured according to the collection rules, the collection rules include: time calibration of monitoring devices, sampling frequency setting of sampled data and transmission frequency setting;

[0007] A processing module, wherein the processing module is configured to perform transmission difference analysis of pipeline gas based on transmission difference calculation factors, wherein the transmission difference calculation factors include: the gas flow rate, the construction gas flow rate, the gas tank inventory before and after a specified time interval, and the pipe inventory in the gas pipeline.

[0008] In summary, the gas management system of this application deploys or transforms several monitoring devices at the monitoring nodes of the gate station, gas storage station and gas pipeline network, accurately collects gas flow data and gas tank inventory data by calibrating the time of the monitoring equipment, and ensures that the collected gas flow data is based on a unified time standard.

[0009] By setting the sampling frequency and transmission frequency of the monitoring equipment, at least part of the collected gas volume data can be aligned in time, thereby realizing the transmission difference analysis of the urban gas pipeline network.

[0010] Furthermore, the processing module is configured to calculate the pipeline inventory based on a pipeline model, wherein the pipeline model is based on a pipeline network information system of a gas enterprise and stores the length, diameter and design pressure data of each pipeline in the gas pipeline network.

[0011] Furthermore, the processing module is configured to: based on the pipeline model, identify the commissioning status of the pipeline, and calculate the pipeline inventory based on the length, diameter, design pressure of each pipeline in use, and the external pressure and temperature data of the corresponding pipeline.

[0012] Furthermore, at least part of the monitoring equipment of the acquisition module is equipped with a corrector to achieve standard condition conversion of metering data at the equipment end.

[0013] Furthermore, the processing module is configured to: identify nodes where monitoring equipment equipped with or not equipped with the corrector is located in the gas pipeline network.

[0014] Furthermore, the processing module is configured to: based on the node identifier, first convert each of the transmission difference calculation factors under non-standard conditions into those under standard conditions, and then perform transmission difference analysis of pipeline gas based on the transmission difference calculation factors under standard conditions, wherein at least part of the transmission difference calculation factors under non-standard conditions are provided by a monitoring device that is not equipped with the corrector.

[0015] Furthermore, the processing module is configured to perform output difference analysis calculation based on the following formula:

[0016]

[0017] In the formula, Indicates the gas volume entering the pipeline, in cubic meters (m³); Indicates the beginning inventory of the period; Indicates the initial gas tank inventory; Indicates the pipeline gas volume; It represents the end-of-period pipe inventory; Indicates the end-of-period gas tank inventory; Indicates the amount of gas flow during construction.

[0018] Furthermore, the monitoring device collects data according to the sampling frequency in the collection rule, wherein the sampling frequency of the sampling data of the monitoring device is set to be less than or equal to 5 minutes / time, and greater than or equal to 60 minutes / time.

[0019] In a second aspect, the present application provides a method for analyzing transmission difference of a gas pipeline network, the method comprising:

[0020] Modify at least part of the monitoring equipment on each monitoring node of the gas pipeline network so that the monitoring equipment collects the gas flow of the gate station and the monitoring node of the gas pipeline network and the gas tank inventory of each gas storage station in the gas pipeline network according to the collection rules;

[0021] Configuring the collection rules, the collection rules including: time calibration of monitoring equipment, sampling frequency setting and transmission frequency setting of sampled data;

[0022] The transmission difference analysis of pipeline gas is performed based on the transmission difference calculation factors, and the transmission difference calculation factors include: the gas flow rate, the construction gas flow rate, the gas tank inventory before and after a specified time interval, and the pipe inventory in the gas pipeline.

[0023] Further, modifying at least part of the monitoring equipment on each monitoring node of the gas pipeline network includes: installing a remote terminal unit to enable the monitoring equipment to store and transmit flow data remotely, and installing a correction instrument to realize standard condition data conversion;

[0024] Among them, the modified monitoring equipment must meet the following requirements: the monitoring equipment supports setting the sampling frequency of the sampling data to less than or equal to 5 minutes / time, and greater than or equal to 60 minutes / time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the composition of a gas management system provided in one embodiment of the present application;

[0026] Figure 2 A schematic diagram of collecting gas volume data in a gas management system provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of a gas management system provided in an embodiment of the present application collecting gas volume data for transmission difference calculation;

[0028] Figure 4 A flowchart of the steps of a method for analyzing transmission difference of a gas pipeline network provided in one embodiment of the present application. DETAILED DESCRIPTION

[0029] The present application will be described in detail below in conjunction with the specific implementation modes shown in the accompanying drawings, but these implementation modes do not limit the present application. Structural, methodological, or functional changes made by ordinary technicians in the field based on these implementation modes are included in the protection scope of the present application.

[0030] According to the loss calculation formula:

[0031]

[0032] In the formula, the factors involved in the calculation of the output difference include: : Indicates the gas volume entering the pipeline, in cubic meters (m³); : Indicates the initial inventory, in cubic meters (m³); : Indicates the initial gas tank inventory, in cubic meters (m³); : Indicates the pipeline gas volume in cubic meters (m³); : represents the end-of-period inventory, in cubic meters (m³); : Indicates the end-of-period gas tank inventory, in cubic meters (m³); : Indicates the gas volume during construction, in cubic meters (m³).

[0033] Among them, the gas volume entering the pipeline Indicates the standard gas volume data of all stations input into the long-distance pipeline network within the specified time interval, and the gas volume out of the pipeline Indicates the total gas consumption under standard conditions of all gas consumption nodes within a specified time interval; the initial pipeline inventory Indicates the pipeline inventory value at the beginning of the specified time interval, calculated based on the pipeline physical model, pipeline commissioning, temperature, air pressure and other factors, and the pipeline inventory at the end of the period Indicates the pipeline inventory value at the end of the specified time period, calculated based on factors such as pipeline physical model, pipeline commissioning, temperature, and air pressure; the initial gas tank inventory Indicates the total volume of the tank inventory at all gas storage stations at the beginning of the specified time period, and the total volume of the tank inventory at the end of the period. It represents the total volume of the tank inventory at all gas storage stations at the end of the specified time period; It is the estimated value of gas flow during the construction of various pipelines within a specified time interval.

[0034] Based on the above principles, in order to solve the deficiencies of the prior art, the original data of each calculation factor within a specified time interval is accurately obtained, and each calculation factor is completely counted and calculated. In the first aspect, the present application provides a gas management system, which is applied to the transmission difference analysis of pipeline gas, such as Figure 1 As shown, the gas management system 100 includes:

[0035] The collection module 11 includes a plurality of monitoring devices, and the collection module 11 is configured to collect the gas flow of the gate station and the monitoring nodes of the gas pipeline network and the gas tank inventory of each gas storage station in the gas pipeline network;

[0036] The control module 12 is used to configure and send collection rules to the collection module 11, so that each monitoring device of the collection module 11 is configured according to the collection rules. The collection rules include: time calibration of the monitoring device, sampling frequency setting of the sampled data, and transmission frequency setting;

[0037] Processing module 13, processing module 13 is configured to: perform transmission difference analysis of pipeline gas based on transmission difference calculation factors, the transmission difference calculation factors include: gas flow, construction gas flow, gas tank inventory before and after a specified time interval, and pipe inventory in the gas pipeline.

[0038] Specifically, Figure 2 As shown, the monitoring equipment used by the acquisition module 11 includes gas flow meters such as gate station flowmeters, gas storage station liquid level / pressure monitoring equipment, industrial household flowmeters, and courtyard pipe network flowmeters, among which the gate station flowmeter collects the gas volume data of the gate station in the city gas pipeline system, the gas storage station hydraulic / pressure monitoring equipment collects the liquid level / pressure index of the gas storage station in the city gas pipeline system, and the industrial household flowmeter collects the gas flow data of large gas consumption points including industrial households, government agencies, schools, and complexes. In addition, in the gas management system of this application, for small gas consumption points such as residential users and individual businesses, monitoring equipment is set in low-pressure regulating boxes such as courtyard pipe networks, so that any courtyard pipe network flowmeter can comprehensively collect the gas flow data of several small gas consumption points such as residential users and individual businesses, and uniformly collect the gas flow data of all gas consumption points at the end. Through the above-mentioned monitoring equipment, the acquisition module 11 can collect the gas flow data of the monitoring nodes of the gate station and the gas pipe network, and can also collect the gas tank inventory of each gas storage station in the gas pipe network.

[0039] The control module 12 configures and issues collection rules to the collection module 11, wherein the collection rules include: time calibration of monitoring equipment and setting of sampling frequency of sampling data. Specifically, the collection module 11 includes several monitoring devices, which are respectively arranged in different areas of the gas pipeline network. By time calibration of the monitoring devices and setting the sampling frequency, the gas flow data collected by the monitoring devices are based on a unified time standard, so as to facilitate the transmission difference analysis and calculation of the collected gas flow data. According to the above description, among the various monitoring devices of the collection module 11, there are monitoring devices for collecting gas flow data of large gas users such as gate stations, gas storage stations and industrial households, which are recorded as first monitoring devices for the convenience of explanation, and there are also monitoring devices for collecting gas flow data of small gas users such as residential households and individual businesses, which are recorded as second monitoring devices for the convenience of explanation. Optionally, the first monitoring device and the second monitoring device can be set to collect gas volume data at the same sampling frequency; the first monitoring device can also be set to sample at a higher sampling frequency to ensure the accuracy and reliability of the sampled data, and the second monitoring device can be set to sample at a lower sampling frequency to reduce the pressure of sampled data storage and processing while meeting the transmission difference analysis requirements. Exemplarily, the sampling frequencies between the first monitoring device and the second monitoring device are set to be a multiple relationship. For example, the sampling frequency of the first monitoring device is set to 5 minutes / time, and the sampling frequency of the second monitoring device is set to 30 minutes / time. Based on 30 minutes as the benchmark, the sampling times of the first monitoring device and the second monitoring device are aligned every 30 minutes, and input difference analysis can be performed based on the data at the time of the alignment.

[0040] Furthermore, as an implementation method, the monitoring device collects data according to the sampling frequency in the collection rules issued by the control module 12, wherein the sampling frequency of the sampling data of the monitoring device is set to be less than or equal to 5 minutes / time, and greater than or equal to 60 minutes / time, thereby filtering out the gas flow data with too low collection frequency and improving the accuracy of the output difference analysis. For example, for small gas consumption points such as residential users and individual businesses, the traditional civil gas meter has a maximum collection frequency of once a day, and the validity of the collected gas volume data is difficult to guarantee. By transforming the courtyard pipe network flow meter, the gas flow data of several terminal gas consumption points such as residential users and individual businesses are uniformly collected, and the reliability of the collected gas volume data is improved. Therefore, according to the sampling frequency of the sampling data of the monitoring device, the gas volume data with too low collection frequency can be filtered out, and the accuracy of the output difference analysis can be improved.

[0041] The collection rules configured by the control module 12 and sent to the collection module 11 also include: the transmission frequency setting of the sampled data. Specifically, the control module 12 reasonably sets the transmission frequency based on the transmission difference analysis requirements and the timing conditions such as the network bandwidth of the gas management system and the amount of gas volume data, so as to ensure that the collected gas volume data can be timely and stably transmitted back to the processing module 13 for analysis and processing. Exemplarily, the control module 12 sends the collection rules to the collection module 11, and all monitoring devices perform time calibration. Starting from 00:00, the monitoring device samples the gas flow data once every 5 minutes, and transmits and reports the data once every 30 minutes. Thus, the system can query the collected data generated 30 minutes ago at 00:05, 00:10, 00:15...00:30 every day.

[0042] The processing module 13 calculates the following output difference calculation factors based on the gas flow data collected by the monitoring equipment: the gas volume m a , Gas volume out of pipeline m b 、Construction air flow volume m f 、Beginning gas tank inventory m s1 、End-of-period gas tank inventory m s2 、Beginning inventory m p1 、End-of-period inventory m p2 The processing module 13 performs transmission difference analysis of pipeline gas based on the above transmission difference calculation factors. Optionally, the processing module 13 also supports the input of gas volume data in the form of manual filling, and processes the gas volume data that does not support remote transmission collection. The manually input gas volume data includes: the construction gas volume that cannot be obtained through records, the gas flow data of the monitoring node that does not support remote transmission, etc., so as to improve the integrity of the gas volume data used for calculating the transmission difference analysis, thereby improving the accuracy and reliability of the transmission difference calculation.

[0043] According to the above description, if Figure 3 As shown, the gas management system 100 of the present application transforms the flow meter of the courtyard pipeline network, uniformly collects the gas flow data of the terminal gas consumption points such as residential users and individual merchants, and combines the monitoring equipment deployed at large gas consumption points such as gate stations, gas storage stations and industrial households. Based on the collection rules issued by the system, the monitoring equipment is time-calibrated to ensure that the collected gas flow data is based on a unified time standard, and by setting the sampling frequency and transmission frequency of the monitoring equipment, the time alignment of most of the collected gas volume data is achieved, thereby realizing the transmission difference analysis of the urban gas pipeline network.

[0044] As an implementation method, the processing module 13 is configured to calculate the pipeline inventory based on the pipeline model, wherein the pipeline model is based on the pipeline network information system of the gas enterprise, and the pipeline model stores key pipeline parameters such as the length, diameter and design pressure data of each pipeline in the gas pipeline network, to ensure the accuracy and reliability of the calculated pipeline inventory results.

[0045] Furthermore, as an implementation method, the processing module 13 can also be configured to identify the commissioning status of the pipeline based on the pipeline model, clarify whether the pipeline is in commissioning status, ensure that only pipelines actually in use are included in the calculation scope, avoid including uncommissioned pipelines in the calculation and cause transmission difference analysis errors, and determine that the pipeline is in commissioning status. The processing module 13 calculates the pipeline inventory based on the length, diameter, design pressure and other parameters of the commissioned pipeline stored in the pipeline model, combined with the external pressure and temperature data of the corresponding pipeline, to improve the accuracy of the pipeline inventory results.

[0046] As an implementation method, at least part of the monitoring equipment of the acquisition module 11 is equipped with a corrector, which converts the original gas flow data collected by the monitoring equipment from the operating volume to the standard volume, realizes the standard conversion of the metering data on the equipment side, and improves the accuracy of the output difference calculation and analysis.

[0047] Furthermore, as an implementation method, the processing module 13 is also configured to: identify the nodes where the monitoring equipment equipped with or not equipped with the corrector is located in the gas pipeline network. Optionally, in combination with the pipeline model, the first identification method includes: identifying the nodes of the monitoring equipment equipped with the corrector in the gas pipeline network; the second identification method includes: identifying the nodes of the monitoring equipment not equipped with the corrector in the gas pipeline network.

[0048] For example, in the gas management system 100 of the embodiment of the present application, the first identification method mentioned above will be used for description.

[0049] As an implementation method, the processing module 13 is further configured to: based on the node identifier, first convert each transmission difference calculation factor under non-standard conditions into that under standard conditions, and then perform transmission difference analysis of pipeline gas based on the transmission difference calculation factors under standard conditions, wherein at least some of the transmission difference calculation factors under non-standard conditions are provided by a monitoring device that is not equipped with a corrector.

[0050] Specifically, based on the above-mentioned first monitoring equipment identification method adopted, in the returned gas volume data, there are some gas volume data without node identification, and the gas volume data without node identification has not been converted from the operating volume to the standard volume, and is the original gas flow data collected by the monitoring equipment that is not equipped with a corrector. When performing data analysis, the processing module 13 first converts the above-mentioned non-standard original gas flow data into gas flow data under standard conditions, obtains the output difference calculation factor under standard conditions based on the converted gas flow data, and then performs output difference analysis of the pipeline gas based on the output difference calculation factor under standard conditions, thereby improving the accuracy of the output difference analysis.

[0051] As an implementation method, the processing module 13 is further configured to: set a specified time interval. The processing module 13 can flexibly adjust the length of the specified time interval to meet the needs of different output difference analyses, and based on the acquisition rules configured by the control module 12, the specified time interval set by the processing module 13 should refer to the data sampling frequency of the monitoring device to ensure that the data provided by different monitoring devices for output difference analysis are aligned in time.

[0052] In the second aspect, the present application provides a method for analyzing the transmission difference of a gas pipeline network, such as Figure 4 As shown, the method comprises the following steps:

[0053] Step S11, modifying at least part of the monitoring equipment on each monitoring node of the gas pipeline network so that the monitoring equipment collects the gas flow of the gate station and the monitoring node of the gas pipeline network and the gas tank inventory of each gas storage station in the gas pipeline network according to the collection rules;

[0054] Step S12, configuring collection rules, the collection rules including: time calibration of monitoring equipment, sampling frequency setting of sampled data and transmission frequency setting;

[0055] Step S13, performing transmission difference analysis of pipeline gas based on transmission difference calculation factors, the transmission difference calculation factors including: gas flow, construction gas flow, gas tank inventory before and after a specified time interval, and pipe inventory in the gas pipeline.

[0056] The present application provides a method for analyzing the transmission difference of a gas pipeline network, which calibrates the time of a monitoring device, sets the sampling frequency and transmission frequency of the monitoring device, obtains the gas flow data of a pipeline gate station, a gas storage station, and monitoring nodes of the gas pipeline network, and obtains a transmission difference calculation factor for transmission difference calculation based on the collected gas flow data, thereby realizing transmission difference calculation of the gas pipeline network.

[0057] Further, as an implementation method, modifying at least part of the monitoring equipment on each monitoring node of the gas pipeline network includes: installing a remote terminal unit to enable the monitoring equipment to store and transmit flow data remotely, ensuring that the collected gas volume data can be promptly and stably transmitted back to the processing end for transmission difference analysis; modifying at least part of the monitoring equipment on each monitoring node of the gas pipeline network also includes: adding a correction instrument to realize standard condition data conversion and improve the accuracy of transmission difference calculation;

[0058] Among them, the modified monitoring equipment must meet the following requirements: the monitoring equipment supports the data sampling frequency being set to less than or equal to 5 minutes / time, and greater than or equal to 60 minutes / time, so that the processing end can filter out the gas volume data with too low collection frequency according to the sampling frequency of the monitoring equipment sampling data, thereby improving the accuracy of the output difference analysis.

[0059] It will be appreciated that the word "exemplary" as used herein means "serving as an example, instance, or illustration". Any embodiment described as "exemplary" is not necessarily preferred or superior to other embodiments and / or does not exclude the combination of features of other embodiments. It will be appreciated that certain features of the present application described in the context of separate embodiments for the sake of clarity may also be provided in a single embodiment by combination. Conversely, various features of the present application described in the context of a single embodiment for the sake of clarity may also be provided individually or in any suitable combination or as any other described embodiment of the present application.

[0060] The above disclosure is only the preferred embodiment of the present application, but it is not intended to limit the scope of rights of the present application. A person of ordinary skill in the art can understand that without departing from the spirit and scope of the present application and the appended claims, changes, modifications, substitutions, combinations, and simplifications should all be equivalent replacement methods and still fall within the scope of the invention.

Claims

1. A gas management system, characterized in that: The gas management system is applied to the transmission difference analysis of pipeline gas, and the gas management system includes: A collection module, the collection module includes a number of monitoring devices, and the collection module is configured to collect the gas flow of the gate station and the monitoring nodes of the gas pipeline network and the gas tank inventory of each gas storage station in the gas pipeline network; A control module, the control module is used to configure and send collection rules to the collection module, so that each monitoring device of the collection module is configured according to the collection rules, the collection rules include: time calibration of monitoring devices, sampling frequency setting of sampled data and transmission frequency setting; A processing module, the processing module is configured to: perform transmission difference analysis of pipeline gas based on transmission difference calculation factors, the transmission difference calculation factors including: the gas flow, construction gas flow, the gas tank inventory before and after a specified time interval, and the pipe inventory in the gas pipeline; The acquisition module includes a first monitoring device and a second monitoring device, the first monitoring device is configured to collect gas flow data of large gas consumption points, and the second monitoring device is configured to uniformly collect gas flow data of several small gas consumption points, the sampling frequency of the small gas consumption points is lower than the sampling frequency setting range of the second monitoring device, and the monitoring device performs data acquisition according to the sampling frequency in the acquisition rule, wherein the sampling frequency setting range of the sampling data of the monitoring device satisfies: less than or equal to 5 minutes / time, and greater than or equal to 60 minutes / time.

2. The gas management system according to claim 1, characterized in that: The processing module is configured to calculate the pipeline inventory based on a pipeline model, wherein the pipeline model is based on a pipeline network information system of a gas enterprise and stores the length, diameter and design pressure data of each pipeline in the gas pipeline network.

3. The gas management system according to claim 2, characterized in that: The processing module is configured to: identify the commissioning status of the pipeline based on the pipeline model, and calculate the pipeline inventory based on the length, diameter, design pressure of each commissioned pipeline, and the external pressure and temperature data of the corresponding pipeline.

4. The gas management system according to claim 1, characterized in that: At least part of the monitoring equipment of the acquisition module is equipped with a corrector to achieve standard condition conversion of metering data at the equipment end.

5. The gas management system according to claim 4, characterized in that: The processing module is configured to: identify nodes where monitoring equipment equipped with or not equipped with the corrector is located in the gas pipeline network.

6. The gas management system according to claim 5, characterized in that: The processing module is configured to: based on the node identifier, first convert each of the transmission difference calculation factors under non-standard conditions into those under standard conditions, and then perform transmission difference analysis of pipeline gas based on the transmission difference calculation factors under standard conditions, wherein at least part of the transmission difference calculation factors under non-standard conditions are provided by a monitoring device that is not equipped with the corrector.

7. The gas management system according to claim 1, characterized in that: The processing module is configured to perform output difference analysis calculation based on the following formula: ; In the formula, Indicates the gas volume entering the pipeline, in cubic meters; Indicates the beginning inventory of the period; Indicates the initial gas tank inventory; Indicates the pipeline gas volume; It represents the end-of-period pipe inventory; Indicates the end-of-period gas tank inventory; Indicates the amount of gas flow during construction.

8. A method for analyzing transmission difference of a gas pipeline network, characterized in that: The method comprises: Modify at least part of the monitoring equipment on each monitoring node of the gas pipeline network so that the monitoring equipment collects the gas flow of the gate station and the monitoring node of the gas pipeline network and the gas tank inventory of each gas storage station in the gas pipeline network according to the collection rules; Configuring the collection rules, the collection rules including: time calibration of monitoring equipment, sampling frequency setting and transmission frequency setting of sampled data; Performing pipeline gas transmission difference analysis based on transmission difference calculation factors, the transmission difference calculation factors including: the gas flow, construction gas flow, the gas tank inventory before and after a specified time interval, and the gas pipeline inventory; The monitoring device includes a first monitoring device and a second monitoring device, the first monitoring device is configured to collect gas flow data of large gas consumption points, and the second monitoring device is configured to uniformly collect gas flow data of several small gas consumption points, the sampling frequency of the small gas consumption points is lower than the sampling frequency setting range of the second monitoring device, and the monitoring device collects data according to the sampling frequency in the collection rule, wherein the sampling frequency setting range of the sampling data of the monitoring device satisfies: less than or equal to 5 minutes / time, and greater than or equal to 60 minutes / time.

9. The method for analyzing transmission difference of a gas pipeline network according to claim 8, characterized in that: Modifying at least part of the monitoring equipment on each monitoring node of the gas pipeline network includes: installing a remote terminal unit to enable the monitoring equipment to realize flow data storage and remote transmission, and adding a correction instrument to realize standard condition data conversion; Among them, the modified monitoring equipment must meet the following requirements: the monitoring equipment supports setting the sampling frequency of the sampling data to less than or equal to 5 minutes / time, and greater than or equal to 60 minutes / time.

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