An exergy meter system and a measuring method for exergy measurement of a gas system

By introducing a table system into the gas system, collecting and calculating data, the problem that traditional metrology methods cannot reflect the system networking characteristics and real-time metrology, real-time metrology and accurate statistics of the distribution of the gas system are realized, and the efficiency of energy transformation and coordinated development of quantity and quality is improved.

CN115265696BActive Publication Date: 2025-04-29TIANJIN UNIV
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Patent Information

Application Number
CN202210756645.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-06-30
Publication Date
2025-04-29
Estimated Expiration
2042-06-30

AI Technical Summary

Technical Problem

The traditional gas system measurement method cannot effectively reflect the networked characteristics of the system, ignores the flow and distribution rules of source-network-load-stores, and cannot achieve real-time measurement and intuitive display of the losses of each main link, making it difficult to accurately discover the main link with low effective energy utilization.

Method used

A metering system for gas system measurement is proposed, including cloud servers, gas source side tables, network side tables and load side tables. Through these tables, data is collected and initially calculated, and transmitted to cloud servers through communication devices for further calculation and feedback, real-time measurement and accurate statistics of the distribution of gas system are realized.

Benefits of technology

Real-time measurement and accurate statistics of the distribution of gas systems are realized, data support is provided for the planning, design and operation optimization of gas systems, and basis for building a fair and reasonable gas trading market, improving the efficiency of energy transformation and coordinated development of quantity and quality.

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Abstract

The present invention discloses a meter system and a metering method for gas system metering, the method comprising: determining basic indicators for gas system metering; generating corresponding initial data and solving the gas system flow according to the unbalanced node power, network topology and pipe network parameters of the gas system; obtaining the node potential vector according to the ambient temperature, airflow rate and gas quality of each node, thereby calculating the distribution of the gas system. The meter system is composed of a cloud server, tables distributed throughout the system, and a communication device for realizing data transmission between the table and the cloud server; the table is divided into a gas source side table, a network side table and a load side table. The present invention realizes real-time metering of distribution parameters of each link of the gas system.
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Description

Technical Field

[0001] The present invention belongs to the technical field of energy quality analysis of gas systems, and relates to the fields of gas systems, gas supply systems, and distributed gas supply, and in particular to a method for gas systems. Metered Meter systems and measurement methods. Background Art

[0002] Energy and environmental issues are becoming increasingly serious, and building a gas system that takes into account the synergy of quantity and quality has become an important part of the energy transformation process. As an important part of energy conversion and supply, the gas industry is the main industry that consumes fossil energy, which has caused a large number of environmental problems. As a reasonable measure of energy quality, the energy that can be theoretically converted into work or other forms of energy under environmental conditions takes into account both the "quantity" and "quality" of energy. Research on gas system effective energy and energy quality analysis technology is of great significance to improving the effective energy utilization rate of the system, realizing energy transformation, and continuously promoting the construction of a gas system with coordinated development of energy quantity and quality.

[0003] Gas system The measurement method is the basis of the energy quality analysis technology of the gas system, and it clarifies the main links of the system. Distribution and Efficiency, can clearly show the effective energy utilization and the location, type and actual size of effective energy loss, so that targeted measures can be taken to reduce it from planning and design, operation optimization, trading and other aspects. Loss, Improvement efficiency, and promote the advancement of energy transformation and upgrading strategies from the perspective of energy quality. Most of the calculation methods establish black box models from a macro perspective, based on the input and output ends of the gas system. Direct calculation cannot clearly reflect the network characteristics of the gas system and ignores In the flow and distribution of source-grid-load-storage. At the same time, it is impossible to achieve The real-time measurement of each subject link cannot be intuitively displayed. Therefore, it is not conducive to accurately discovering the main links with low effective energy utilization rate and taking targeted measures to reduce it. damage. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a method for a gas system Metered The present invention can be used in gas systems. Distributed real-time metering and display of calculation results at all stages of the gas system to achieve Accurate statistics of gas distribution provide data support for gas system planning, design and operation optimization, and build Provide a basis for the gas market of trading objects.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A gas system Metered Meter system, including cloud server, gas source side Table, network side Table, load side Table, and implementation Communication device for data transmission between the meter and the cloud server; the gas source side The table includes the gas source side high pressure gas source installed at the high pressure gas source, medium pressure gas source and low pressure gas source supply gate station Table, medium pressure on gas source side Low pressure on the meter and gas source side Table; the network side The table includes network-side high-pressure pipelines installed at nodes of high-pressure pipeline network, medium-pressure pipeline network and low-pressure pipeline network respectively. Meter, network side medium voltage Meter and network side low voltage Table; the load side The table is divided into load side medium pressure Low pressure on meter and load side The meters are installed at the nodes corresponding to the gas load;

[0007] Said Each table in the system Table is used to collect and preliminarily calculate The cloud server collects the data needed for the situation and transmits the relevant data information to the cloud server; the cloud server transmits the collected information through the gas system The flow mechanism model is calculated and the calculation results are fed back to each table, and then by The table shows the real-time feedback from the cloud server. Parameter result;

[0008] Said The table system is a double-layer system, which is divided into two parts: the upper system and the lower system;

[0009] The upper system includes a cloud server, which is used to calculate the gas system Distribution, including according to the gas source side Calculate the gas source based on the data in the table ; According to the load side Calculate gas load with data from table ; According to the network side Data calculation pipeline for tables Streams and Pipes Calculate the loss of gas system efficiency.

[0010] The lower system is composed of the gas source side Table, network side Table, load side Table composition, gas source side Table, network side Table, load side The tables are connected to each other through communication devices for mutual communication. Table is used to obtain the installed nodes The air flow rate, load air flow rate and pipeline air flow rate are measured.

[0011] Furthermore, Each table in the system Table is used to collect and preliminarily calculate The data required for the trend include:

[0012]

[0013] In the formula, p g For Node Potential, T a is the ambient temperature, T b is the theoretical combustion temperature of the gas; GCV is the calorific value of the gas;

[0014] According to the gas source side Calculate the gas source based on the data in the table , the calculation formula is shown in formula (2):

[0015] e g,S =p g,S m g,S (10)

[0016] In the formula, e g,S For gas source , p g,S Gas source node Potential, m g,S is the source gas flow rate;

[0017] According to the load side Calculate gas load with data from table , the calculation formula is shown in formula (3):

[0018] e g,L =p g,L mg,L (11)

[0019] In the formula, e g,L For load , p g,L Gas load node Potential, m g,L is the air load airflow rate;

[0020] According to the network side Data calculation pipeline for tables Streams and Pipes The calculation formula is shown in equations (4)-(5):

[0021] e g,P =p g,p m g,p (12)

[0022] Δe g,P =(p g,P1 -p g,P2 )·m g,P (13)

[0023] In the formula, e g,P For pipeline Flow, Δe g,P For pipeline Loss, p g,p For pipeline Potential, p g,P1 and p g,P2 For both ends of the gas pipeline Potential, m g,P is the duct airflow rate;

[0024] The calculation of the gas system The calculation formula of efficiency is shown in formula (6):

[0025]

[0026] Where η Ex for Efficiency, E in For input , E out Output .

[0027] Furthermore, if there is a gas storage device in the gas system, the load side Table, gas source side The meters are installed at the air inlet and outlet of the gas storage device to measure the gas storage device and pipeline. distributed;

[0028] Furthermore, if there is a distributed gas source in the gas system, The meter can measure the actual gas supply from distributed gas sources to the energy network. Considering that the injection of distributed gas sources with different qualities changes the relative density and calorific value of the gas network, the gas system is solved alternately by the airflow-relative density-calorific value equation to obtain the gas quality of the entire gas system. The calculation formula is shown in equations (7)-(8):

[0029]

[0030]

[0031] In the formula, s i is the relative density after mixing different qualities, s in is the relative density of inflow into node i, ρ in is the flow rate into node i, ρ out is the flow out of node i, GCV in is the heat value flowing into node i, GCV out is the heat value flowing out of node i;

[0032] Combined with formula (2), the gas source of the distributed gas source is calculated as , combined with equations (4)-(5), the distributed gas source injection pipeline is calculated to obtain flow and harmony damage.

[0033] The present invention also provides a method based on the Meter system to realize gas system Methods of measurement include:

[0034] (1) Determine the gas system Basic indicators of metering parameters; including nodes Momentum, gas source , Gas load ,pipeline Stream, Pipe The specific definitions of each indicator are:

[0035] node potential, which means the amount of air carried per unit airflow rate , unit is kWh / m 3 ;

[0036] Gas source , indicating the gas source supplies to the gas system ;

[0037] Gas load , which indicates the consumption of gas at the load ;

[0038] pipeline Flow, which means the heat released when the gas consumed by the gas load changes from ambient temperature to theoretical combustion temperature during the combustion process Distribution in gas pipelines;

[0039] pipeline loss, nodes at both ends of the pipeline There are differences in potential, which affects the pipeline Flow, steady state conditions, the nodes at both ends of the pipeline The change of flow is equivalent to pipeline damage;

[0040] (2) According to the gas source side of the gas system The table measures the non-balanced node airflow rate, which represents the power provided by the air source or consumed by the load:

[0041] (3) Based on the gas system flow solution, the distribution of pipeline gas flow rate is obtained;

[0042] (4) According to steps (2) and (3), calculate each node momentum;

[0043] (5) According to the above nodes Potential, combined with air flow rate to calculate the gas source , Gas load ,pipeline Streams and Pipes Distribution of loss.

[0044] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the gas system. Steps of measurement method.

[0045] The present invention also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the gas system Steps of measurement method.

[0046] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0047] 1. Gas system of the present invention The proposed measurement method combines the network characteristics of the gas system with the concept of coordinated development of quantity and quality, and establishes a gas system considering distributed hydrogen injection. Distribution The flow mechanism model is based on the ambient temperature, theoretical combustion temperature and airflow rate of each main link to obtain real-time Parameter values ​​can reflect the effective energy utilization in the production, transmission, distribution, conversion, storage and other links of the gas system.

[0048] 2. It can uniformly represent different forms of energy, has potential commodity attributes, and uses cloud data processing technology to convert the real-time data of each link from source to grid to load to storage. The parameter calculation results are intuitively displayed to gas suppliers and gas users, providing a basis for building a more fair and reasonable gas trading market and achieving better demand response.

[0049] 3. Compared with the existing method based on gas system energy measurement, the present invention takes into account both the "quantity" and "quality" of energy in the gas system, based on the source-grid-load-storage and A gas system considering energy quality was proposed. The measurement method proposed The concept of a meter can measure the gas system distributed.

[0050] 4. Based on the traditional energy monitoring device, the present invention Combined with the network characteristics of the gas system, the distribution of the effective energy in the gas system is comprehensively considered, and the effective energy utilization of the gas system is reflected in the Table interface.

[0051] 5. The present invention takes into account the existence of distributed gas sources in the gas system. Meters measure the actual gas supply from distributed gas sources to the energy network , which can provide theoretical support for the coordinated development of quantity and quality of gas systems containing distributed gas sources.

[0052] 6. The present invention has broad application prospects, gas system Measurement methods and The table system comprehensively considers the "quantity" and "quality" of the gas system to model the gas system, reflecting the relationship between the input and output effective energy of the gas system. In actual engineering, it can be based on the gas system The measurement results optimize the overall energy quality of the system; based on the gas system Measurement methods and The meter system allows decision makers to clearly observe the gas system The distribution of energy can be analyzed in order to analyze the energy quality characteristics, and then technical means such as equipment configuration and operation optimization can be adopted to improve the weak links in the system energy consumption and reduce the loss of local high-quality energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 In the embodiment of the present invention Table system structure diagram.

[0054] Figure 2 Schematic diagram of the structure of the gas system in an embodiment of the present invention.

[0055] Figure 3 The gas system node in the embodiment of the present invention Potential, pipeline Streams and Pipes Schematic diagram of damage distribution. DETAILED DESCRIPTION

[0056] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0057] A method for realizing a gas system proposed by the present invention Metered The table system is structured as Figure 1 shown. The meter system consists of a cloud server, gas source side distributed throughout the system Table, network side Table, load side Table, and implementation The cloud server is a computing center responsible for data transmission between the table and the cloud server. The meter system communicates to obtain the flow conditions of the gas system and calculates the gas system distributed; The meter is divided into gas source side according to its different positions in the gas system Table, network side Table and load side Table; Gas source side The table is divided into high pressure on the gas source side Table, medium pressure on gas source side Low pressure on the meter and gas source side The meters are installed at the high-pressure gas source, medium-pressure gas source and low-pressure gas source supply gate stations respectively; network side Network side high voltage Meter, network side medium voltage Meter and network side low voltage The meters are installed at the nodes of the high-pressure pipe network, medium-pressure pipe network and low-pressure pipe network respectively; The table is divided into load side medium pressure Low pressure on meter and load side The meters are installed at the nodes corresponding to the gas load. Table used to collect and calculate gas system The required data is distributed, the collected data is transmitted to the cloud server through the communication device, and the calculation results fed back by the cloud server are displayed. Figure 1 The solid black line of the one-way arrow represents the gas pipeline, and the dotted gray line of the two-way arrow represents the communication line and direction.

[0058] In this embodiment The meter system is a two-layer system, which is divided into two parts: the upper system and the lower system. The upper system includes a cloud server, which can be used to calculate the gas system Distribution, including according to the gas source side Calculate the gas source based on the data in the table ; According to the load side Calculate gas load with data from table ; According to the network side Data calculation pipeline for tables Streams and Pipes Loss; Down

[0059] Layer system from the gas source side Table, network side Table, load side Table composition, The tables communicate with each other to obtain Table of installed nodes The gas source airflow rate, load airflow rate and pipeline airflow rate are measured to calculate the gas system efficiency.

[0060] The cloud server applies the gas system proposed by the present invention measurement methods and through The functions of data exchange, data display and communication between meters are solid lines for gas system Real-time measurement and display. The basic measurement and display indicators of the table include node ambient temperature, node Potential, pipeline Stream, Pipe loss, air pressure; for the air source side The meter also needs to show the gas source ; For the load side The meter should also show the gas load If there is a distributed gas source in the gas system, the distributed gas source is regarded as the gas source, and the gas source side is installed at the distributed gas source. Meter, used to measure the actual gas supply from distributed gas sources to the gas pipeline ; For gas systems with gas storage devices, the load side Table, gas source side The meters are installed at the air inlet and outlet of the gas storage device, and can measure the gas storage device and pipeline. Distribution; For gas systems with distributed gas sources, it is necessary to consider that the injection of distributed gas sources with different qualities changes the relative density and calorific value of the gas system. Therefore, the gas system is solved alternately by using the airflow-relative density / calorific value equation to obtain the quality of the entire gas system. Further, the gas source of the distributed gas source is calculated. and distributed gas source injection pipelines flow and harmony damage.

[0061] Specifically, Each table in the system Table is used to collect and preliminarily calculate The data required for the trend include:

[0062]

[0063] In the formula, p g For Node Potential, T a is the ambient temperature, T b is the theoretical combustion temperature of the gas; GCV is the calorific value of the gas;

[0064] According to the gas source side Calculate the gas source based on the data in the table , and its calculation formula is shown in formula (2):

[0065] e g,S =p g,S m g,S (18)

[0066] In the formula, e g,S For gas source , p g,S Gas source node Potential, m g,S is the source gas flow rate;

[0067] According to the load side Calculate gas load with data from table , and its calculation formula is shown in formula (3):

[0068] e g,L =p g,L m g,L (19)

[0069] In the formula, e g,L For load , p g,L Gas load node Potential, m g,L is the air load airflow rate;

[0070] According to the network side Data calculation pipeline for tables Streams and Pipes The calculation formula is shown in equations (4)-(5):

[0071] e g,P =p g,p m g,p (20)

[0072] Δe g,P =(p g,P1 -p g,P2 )·m g,P (twenty one)

[0073] In the formula, e g,P For pipeline Flow, Δe g,P For pipeline Loss, p g,p For pipeline Potential, p g,P1 and p g,P2 For both ends of the gas pipeline Potential, m g,P is the duct airflow rate;

[0074] Calculate the gas system The calculation formula of efficiency is shown in formula (6):

[0075]

[0076] Where η Ex for Efficiency, E in For input , E out Output .

[0077] For gas systems with distributed gas sources, The meter can measure the actual gas supply from distributed gas sources to the energy network. It is necessary to consider that the injection of distributed gas sources with different qualities changes the relative density and calorific value of the gas network. Therefore, the gas network is solved alternately by the airflow-relative density / calorific value equation to obtain the quality of the entire gas network. The calculation formula is shown in equations (7)-(8):

[0078]

[0079]

[0080] In the formula, s i is the relative density after mixing different qualities, s in is the relative density of inflow into node i, ρ in is the flow rate into node i, ρout is the flow out of node i, GCV in is the heat value flowing into node i, GCV out is the heat value flowing out of node i;

[0081] Combined with formula (2), the gas source of the distributed gas source is calculated as , combined with equations (4)-(5), the distributed gas source injection pipeline is calculated to obtain flow and harmony damage;

[0082] Specifically, through the above The meter system performs metering as follows:

[0083] (1) Determine the gas system Basic indicators of metrological parameters;

[0084] Gas system The basic indicators of measurement parameters include nodes Momentum, gas source , Gas load ,pipeline Stream, Pipe The specific definitions of each indicator are:

[0085] node potential, which means the amount of air carried per unit airflow rate , unit is kWh / m 3 ;

[0086] Gas source , indicating the gas source supplies to the network ;

[0087] load , which indicates the consumption of gas at the load ;

[0088] pipeline Flow, which means the heat released when the gas consumed by the gas load changes from ambient temperature to theoretical combustion temperature during the combustion process Distribution in gas pipelines;

[0089] pipeline loss, nodes at both ends of the pipeline There are differences in potential, which affects the pipeline Flow, steady state conditions, the nodes at both ends of the pipeline The change of flow is equivalent to pipeline damage;

[0090] The lower-level systems The table collects the ambient temperature of the corresponding node and the air source air flow rate, air load air flow rate, and pipeline air flow rate; The tables communicate with each other. Table preliminary calculation of installation nodes The communication device uploads the packaged information to the cloud server;

[0091] (2) The cloud server obtains the distribution of pipeline airflow rate based on the gas system flow solution according to the unbalanced node power, network topology, and pipeline network parameters of the gas system;

[0092] (3) Utilization of cloud servers Table transfer Combined with the gas system flow distribution data, the gas source of the gas system is calculated , Gas load ,pipeline Streams and Pipes Distribution of loss.

[0093] Specifically, the gas system of the present invention Measurement methods and The meter system is applied to the implementation example of a 6-node gas system. Measure and verify the effectiveness of the present invention.

[0094] The gas system structure used in the embodiment of the present invention is as follows: Figure 2 As shown, there are 1 gas gate station, 1 distributed gas source, and 4 loads. The parameters of each gas pipeline are shown in Table 1.

[0095] Table 1 Gas pipeline parameters

[0096]

[0097] The nodes and load power of the gas system are shown in Table 2:

[0098] Table 2 Gas load power

[0099]

[0100] The gas system according to the present invention Measurement methods and Table system, first get the gas system node Potential distribution, gas system nodes The potential distribution diagram is shown in Figure 3 The unit is kW. flow, The loss distribution is shown in Table 3. ,load ,load The loss results are shown in Table 4. Loss, total supply at source , total load The results are shown in Table 5. Equal to the load consumption With all The sum of the losses proves that the system of this embodiment Balance verifies the effectiveness of the present invention.

[0101] Table 3 Flow distribution calculation results (kW)

[0102]

[0103] Table 4 Source ,load and load Loss(kW)

[0104]

[0105] Table 5 Gas system overview Loss, total supply at source and the total load Calculation result (kW)

[0106]

[0107] Therefore, energy-efficient devices may Low efficiency. Gas based system The measurement method and #imgpt309# table can obtain the #imgpt310# distribution of the gas system. When studying the equipment selection and capacity configuration of the gas system, the differences in energy "quantity" and "quality" should be comprehensively considered.

[0108] Finally, it should be pointed out that the above examples are only used to illustrate the calculation process of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above examples, a person skilled in the art should understand that the calculation process described in the above examples can still be modified, or some parameters can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding calculation method deviate from the spirit and scope of the calculation method of the present invention.

[0109] The present invention is not limited to the embodiments described above. The above description of the specific embodiments is intended to describe and illustrate the technical solution of the present invention. The above specific embodiments are merely illustrative and not restrictive. Without departing from the scope of the present invention and the scope of protection of the claims, a person of ordinary skill in the art can also make many forms of specific changes under the guidance of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A gas system Metered Table system, characterized in that Including cloud server, gas source side Table, network side Table, load side Table, and implementation Communication device for data transmission between the meter and the cloud server; the gas source side The table includes the gas source side high pressure gas source installed at the high pressure gas source, medium pressure gas source and low pressure gas source supply gate station Table, medium pressure on gas source side Low pressure on the meter and gas source side Table; the network side The table includes network-side high-pressure pipelines installed at nodes of high-pressure pipeline network, medium-pressure pipeline network and low-pressure pipeline network respectively. Meter, network side medium voltage Meter and network side low voltage Table; the load side The table is divided into load side medium pressure Low pressure on meter and load side The meters are installed at the nodes corresponding to the gas load; Said Each table in the system Table is used to collect and preliminarily calculate The data required by the situation and the relevant data information are transmitted to the cloud server; The cloud server transmits the collected information through the gas system The flow mechanism model is calculated and the calculation results are fed back to each table, and then by The table shows the real-time feedback from the cloud server. Parameter result; Said The table system is a double-layer system, which is divided into two parts: the upper system and the lower system; The upper system includes a cloud server, which is used to calculate the gas system Distribution, including according to the gas source side Calculate the gas source based on the data in the table According to the load side Calculate gas load with data from table According to the network side Data calculation pipeline for tables Streams and Pipes Calculate the loss of gas system efficiency; The lower system is composed of the gas source side Table, network side Table, load side Table composition, gas source side Table, network side Table, load side The tables are connected to each other through communication devices for mutual communication. Table is used to obtain the installed nodes The air flow rate, load air flow rate and pipeline air flow rate are measured.

2. A method for a gas system according to claim 1 Metered Table system, characterized in that Each table in the system Table is used to collect and preliminarily calculate The data required for the trend include: In the formula, p g For Node Potential, T a is the ambient temperature, T b is the theoretical combustion temperature of the gas; GCV is the calorific value of the gas; According to the gas source side Calculate the gas source based on the data in the table The calculation formula is shown in formula (2): e g,S =p g,S m g,S (2) In the formula, e g,S For gas source p g,S Gas source node Potential, m g,S is the source gas flow rate; According to the load side Calculate gas load with data from table The calculation formula is shown in formula (3): e g,L =p g,L m g,L (3) In the formula, e g,L For load p g,L Gas load node Potential, m g,L is the air load airflow rate; According to the network side Data calculation pipeline for tables Streams and Pipes The calculation formula is shown in equations (4)-(5): e g,P =p g,p m g,p (4) Δe g,P =(p g,P1 -p g,P2 )·m g,P (5) In the formula, e g,P For pipeline Flow, Δe g,P For pipeline Loss, p g,p For pipeline Potential, p g,P1 and p g,P2 For both ends of the gas pipeline Potential, m g,P is the duct airflow rate; The calculation of the gas system The efficiency is calculated as shown in formula (6): Where η Ex for Efficiency, E in For input E out Output 3. A method for a gas system according to claim 1 Metered Table system, characterized in that If there is a gas storage device in the gas system, the load side Table, gas source side The meters are installed at the air inlet and outlet of the gas storage device to measure the gas storage device and pipeline. distributed.

4. A method for a gas system according to claim 2 Metered Table system, characterized in that If there is a distributed gas source in the gas system, The meter can measure the actual gas supply from distributed gas sources to the energy network. Considering that the injection of distributed gas sources with different qualities changes the relative density and calorific value of the gas network, the gas quality of the entire gas system is obtained by alternately solving the gas flow-relative density-calorific value equation. The calculation formulas are shown in equations (7)-(8): In the formula, s i is the relative density after mixing different qualities, s in is the relative density of inflow into node i, ρ in is the flow rate into node i, ρ out is the flow out of node i, GCV in is the heat value flowing into node i, GCV out is the heat value flowing out of node i; Combined with formula (2), the gas source of the distributed gas source is calculated as Combined with equations (4) and (5), the distributed gas source injection pipeline is calculated to obtain flow and harmony damage.

5. A method according to claim 1 Meter system to realize gas system The method of metering is characterized in that include: (1) Determine the gas system Basic indicators of metering parameters; including nodes Momentum, gas source Gas load pipeline Stream, Pipe The specific definitions of each indicator are: node potential, which means the amount of air carried per unit airflow rate The unit is kWh / m 3 ; Gas source Indicates the gas source supplying the gas system Gas load Indicates the consumption of gas at load pipeline Flow, which means the heat released when the gas consumed by the gas load changes from ambient temperature to theoretical combustion temperature during the combustion process Distribution in gas pipelines; pipeline loss, nodes at both ends of the pipeline There are differences in potential, which affects the pipeline Flow, steady state conditions, the nodes at both ends of the pipeline The change of flow is equivalent to pipeline damage; (2) According to the gas source side of the gas system The table measures the non-balanced node airflow rate, which represents the power provided by the air source or consumed by the load: (3) Based on the gas system flow solution, the distribution of pipeline gas flow rate is obtained; (4) According to steps (2) and (3), calculate each node momentum; (5) According to the above nodes Potential, combined with air flow rate to calculate the air source Gas load pipeline Streams and Pipes Distribution of loss.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the gas system according to claim 5 is realized. Steps of the measurement method.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the gas system according to claim 5 is realized. Steps of the measurement method.

Citation Information

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