CN116974308A - Control device and method for natural gas metering valve - Google Patents
Control device and method for natural gas metering valve Download PDFInfo
- Publication number
- CN116974308A CN116974308A CN202310956348.7A CN202310956348A CN116974308A CN 116974308 A CN116974308 A CN 116974308A CN 202310956348 A CN202310956348 A CN 202310956348A CN 116974308 A CN116974308 A CN 116974308A
- Authority
- CN
- China
- Prior art keywords
- natural gas
- metering valve
- gas metering
- opening degree
- target
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 528
- 239000003345 natural gas Substances 0.000 title claims abstract description 264
- 238000000034 method Methods 0.000 title claims abstract description 62
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 78
- 238000013507 mapping Methods 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 14
- 101100497221 Bacillus thuringiensis subsp. alesti cry1Ae gene Proteins 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 238000012549 training Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- ONSIBMFFLJKTPT-UHFFFAOYSA-L zinc;2,3,4,5,6-pentachlorobenzenethiolate Chemical compound [Zn+2].[S-]C1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl.[S-]C1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl ONSIBMFFLJKTPT-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention provides a control device and a control method for a natural gas metering valve, which are used for predicting the air pressure of the input end of the natural gas metering valve by utilizing an input end air pressure prediction model of a current node in each prediction period of the natural gas metering valve to obtain an air pressure data sequence, obtaining a pressure stabilizing section of the output end of the natural gas metering valve corresponding to the current node, mapping the pressure stabilizing section of the output end of the natural gas metering valve to an input space to obtain the pressure stabilizing section of the input end of the natural gas metering valve, when the air pressure data sequence contains an air pressure value exceeding the pressure stabilizing section of the input end, obtaining an air pressure value sequence exceeding the pressure stabilizing section of the input end and a corresponding time value sequence, obtaining the minimum value in the time value sequence, and generating an opening adjustment control instruction of the natural gas metering valve according to the current time point and the minimum value, so that the service life of the natural gas metering valve can be prolonged under the condition of guaranteeing the stability of the pressure or flow of the output end.
Description
Technical Field
The invention relates to the technical field of industrial control, in particular to a control device and a control method for a natural gas metering valve.
Background
The natural gas metering valve is a key device for natural gas delivery and metering, and the main function of the natural gas metering valve is to stabilize the natural gas pressure and control the flow rate. In the current natural gas pipeline conveying system, the natural gas pressure and the natural gas flow of each natural gas branch pipeline are difficult to keep stable due to the gas source change of the natural gas pipeline and the large branches of the distribution surface of the natural gas pipeline. Because natural gas has the characteristic of inflammability and explosiveness, the natural gas user terminal equipment often has higher requirements on input air pressure and input flow, and different natural gas users have different requirements on the pressure and flow of natural gas transportation.
Industrial users, such as factories, power plants, etc., have high demands for large flows and high gas pressures to ensure stable fuel supply and equipment operation. Therefore, when natural gas pipelines are used for conveying natural gas to an industrial area, high pressure (3-10 MPa) and large flow (millions of cubic meters per day) are generally required, industrial users have higher requirements on the stability of the air pressure and the flow, and particularly, if the air pressure or the flow greatly fluctuates, the normal operation of the process equipment can be directly influenced, and even the equipment is damaged. The gas requirements of commercial and residential users are relatively small, and no too high gas pressure (typically 0.3-0.6 MPa) is required. But they also have high requirements for air pressure and flow stability to ensure proper life and operation. Commercial users refer to shops, hotels and the like, and civilian users refer to residential homes. The stability of air pressure and flow is also required by commercial users and civil users to ensure normal use of cooking, heating and other appliances, but compared with the requirements of industrial users, the allowable fluctuation range is slightly larger, and if the air pressure or flow fluctuates slightly in a short time, the users are not affected greatly. The pressure required by the natural gas users such as natural gas filling stations and the like for vehicles is generally 20-25MPa, the flow demand is larger, but the real-time flow can be greatly fluctuated because the filling is intermittent. Natural gas filling stations have high requirements on the stability of the gas pressure to ensure filling of the fuel for each vehicle, and because filling is an intermittent process, the flow can fluctuate greatly, which is acceptable in a certain range.
In order to ensure the stability of the input air pressure or the input flow of the natural gas user equipment, the conventional single-loop PID (Proportional Integral Derivative, proportional integral derivative controller) control strategy is adopted in the conventional common solution, the opening of the natural gas metering valve is adjusted based on the air pressure or flow data monitored in real time, the high-precision adjustment means that the mechanical control of the valve is very frequent although the stability of the air pressure or the flow of the output end of the valve can be ensured to a certain extent, the valve opening fine adjustment with high frequency for a long time can cause the abrasion of the internal structure of the valve, and even the air tightness of the natural gas pipeline at the valve can be influenced under severe conditions, so that the natural gas leakage, even fire and other bad results are caused.
Disclosure of Invention
The invention is based on the above problems, and provides a control device and a control method for a natural gas metering valve, which can prolong the service life of the natural gas metering valve under the condition of ensuring the stability of the pressure or flow of an output end.
In view of this, a first aspect of the present invention proposes a control device for a natural gas metering valve, comprising a first communication unit for communication connection with the natural gas metering valve, a second communication unit for communication connection with a background server, a memory for storing an input gas pressure prediction model and an input flow prediction model of the natural gas metering valve, and a processor, the processor acquiring pressure data and flow data of its input and output from the natural gas metering valve through the first communication unit, transmitting the pressure data and flow data of its input and output to the background server through the second communication unit, the processor being configured to:
Acquiring a prediction period T of the air pressure of an input end of a preset natural gas metering valve prd Predicted time period T pdn ；
At each prediction period T prd Predicting the air pressure of the input end of the natural gas metering valve by using an input end air pressure prediction model of the current node to obtain the time length which is equal to the prediction time length T pdn Is a barometric data sequence P (t) i ) Wherein i is a positive integer between 1 and n, n being the barometric data sequence P (t i ) A discrete number of barometric pressure values;
recording the current time point t now ；
Acquiring a voltage stabilizing interval of an output end of a natural gas metering valve corresponding to a current node
The pressure stabilizing section of the output end of the natural gas metering valveMapping to the input space to obtain the pressure stabilizing section of the input end of the natural gas metering valve>
Wherein 0 < θ now ＜1，θ now K is the flow coefficient of the natural gas metering valve for the current opening degree of the natural gas metering valve;
determining the barometric pressure data sequence P (t) i ) Whether or not to contain a voltage stabilizing section beyond the input endIs a gas pressure value of (2);
when the barometric data sequence P (t i ) Comprises a voltage stabilizing section exceeding the input endWhen the air pressure value of the input end is exceeded, a pressure stabilizing section is acquired>Is a sequence of barometric values pj and its correspondingTime value sequence t j Wherein j is 1 to m p Positive integer between m p For the barometric data sequence P (t i ) Is included beyond the voltage stabilizing section of the input terminal>Is a discrete air pressure value of (a);
acquiring the time value sequence t j The minimum value of (3):
according to time point t now And the minimum value t min And generating an opening adjustment control instruction of the natural gas metering valve.
A second aspect of the invention proposes a control method for a natural gas metering valve, comprising:
acquiring a prediction period T of the air pressure of an input end of a preset natural gas metering valve prd Predicted time period T pdn ；
At each prediction period T prd Predicting the air pressure of the input end of the natural gas metering valve by using an input end air pressure prediction model of the current node to obtain the time length which is equal to the prediction time length T pdn Is a barometric data sequence P (t) i ) Wherein i is a positive integer between 1 and n, n being the barometric data sequence P (t i ) A discrete number of barometric pressure values;
recording the current time point t now ；
Acquiring a voltage stabilizing interval of an output end of a natural gas metering valve corresponding to a current node
The pressure stabilizing section of the output end of the natural gas metering valveMapping to an input space results in an input to the natural gas metering valveVoltage stabilizing section->
Wherein 0 < θ now ＜1，θ now K is the flow coefficient of the natural gas metering valve for the current opening degree of the natural gas metering valve;
Determining the barometric pressure data sequence P (t) i ) Whether or not to contain a voltage stabilizing section beyond the input endIs a gas pressure value of (2);
when the barometric data sequence P (t i ) Comprises a voltage stabilizing section exceeding the input endWhen the air pressure value of the input end is exceeded, a pressure stabilizing section is acquired>Is a barometric pressure value sequence p j And its corresponding time value sequence t j Wherein j is 1 to m p Positive integer between m p For the barometric data sequence P (t i ) Is included beyond the voltage stabilizing section of the input terminal>Is a discrete air pressure value of (a);
acquiring the time value sequence t i The minimum value of (3):
according to time point t now And the minimum value t min Generating the dayAnd opening degree adjustment control instructions of the gas metering valve.
Further, in the control method for a natural gas metering valve, the control method further includes:
at each prediction period T prd Predicting the flow of the input end of the natural gas metering valve by using an input end flow prediction model of the current node to obtain a time length which is equal to the prediction time length T pdn Traffic data sequence Q (t) i )；
Obtaining a steady flow interval of an output end of a natural gas metering valve corresponding to a current node
The steady flow interval of the output end of the natural gas metering valveMapping to the input space to obtain a steady flow interval of the input end of the natural gas metering valve >
Wherein Δp max Monitoring the resulting maximum pressure differential between the input and output of the natural gas metering valve;
determining the flow data sequence Q (t i ) Whether or not to contain a steady flow interval beyond the input endIs a flow value of (1);
when the flow data sequence Q (t i ) Comprises a steady flow section exceeding the input endWhen the flow value of the flow sensor exceeds the steady flow interval of the input end/>Flow value sequence q l And its corresponding time value sequence t l Wherein l is 1 to m q Positive integer between m q For the sequence of traffic data Q (t i ) The included steady flow interval beyond the input end +.>Is the number of discrete flow values;
acquiring the time value sequence t l The minimum value of (3):
according to time point t now And the minimum value t min And generating an opening adjustment control instruction of the natural gas metering valve.
Further, in the control method for a natural gas metering valve described above, according to the time point t now And the minimum value t min The step of generating the opening degree adjustment control command of the natural gas metering valve specifically comprises the following steps:
calculating the current time point t now And the minimum value t min Time difference between:
Δt min ＝t min -t now ；
acquiring the current opening theta of the natural gas metering valve now ；
Based on the time difference Δt min Calculating the target opening theta of the natural gas metering valve target ；
Calculating the opening adjustment span of the natural gas metering valve:
Δθ target ＝θ target -θ now ；
adjusting the span delta theta according to the opening degree target And generating an opening adjustment control instruction of the natural gas metering valve.
Further, in the control method for a natural gas metering valve described above, the time difference Δt is based on min Calculating the target opening theta of the natural gas metering valve target The method specifically comprises the following steps:
acquiring a preset opening adjustment speed v of a natural gas metering valve θ ；
Acquisition time point t min Corresponding air pressure value
Calculating a first boundary opening degree and a second boundary opening degree of the natural gas metering valve:
according to the first boundary opening degree theta 1 And the second boundary opening degree theta 2 Determining the target opening degree theta target 。
Further, in the control method for a natural gas metering valve described above, the time difference Δt is based on min Calculating the target opening theta of the natural gas metering valve target The method specifically comprises the following steps:
taking the opening adjusting speed v of a preset natural gas metering valve θ ；
Acquisition time point t min Corresponding flow value
Calculating a third boundary opening degree and a fourth boundary opening degree of the natural gas metering valve:
according to the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 Determining the target opening degree theta target 。
Further, in the control method for a natural gas metering valve described above, the control method is performed based on the first boundary opening θ 1 And the second boundary opening degree theta 2 Or the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 Determining the target opening degree theta target The method specifically comprises the following steps:
calculating and adjusting to the first boundary opening degree theta 1 And the second boundary opening degree theta 2 Or the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 First and second adjustment times required:
or alternatively
When (when)Or->When (I)>Determining Δt min Whether or not is greater than->
When (when)At the time, the second boundary opening degree theta 2 Or the fourth boundary opening degree theta 4 Determining the target opening degree, namely:
θ target ＝θ 2 or (b)
θ target ＝θ 4 。
Further, in the control method for a natural gas metering valve described above, Δt is determined min Whether or not it is greater thanAfter the step of (a), further comprising:
when (when)Based on the time value sequence t j The minimum value t of (2) min Calculating the target opening degree:
θ target ＝θ now +v θ ·Δt min 。
further, in the control method for a natural gas metering valve described above, the control value is calculated and adjusted to the first boundary opening degree θ 1 And the second boundary opening degree theta 2 Or the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 After the steps of the first adjustment time and the second adjustment time, which are required, the method further comprises:
when (when)Or->When (I)>Determining Δt min Whether or not is greater than->
When (when)At the time, the first boundary opening degree theta 1 Or the third boundary opening degree theta 3 Determining the target opening degree, namely:
θ target ＝θ 1 or (b)
θ target ＝θ 3 。
Further, in the control method for a natural gas metering valve described above, Δt is determined min Whether or not it is greater thanAfter the step of (a), further comprising:
when (when)Based on the time value sequence t j The minimum value t of (2) min Calculating the target opening degree:
θ target ＝θ now +v θ ·Δt min 。
the invention provides a control device and a control method for a natural gas metering valve, which are used for predicting the air pressure of the input end of the natural gas metering valve by utilizing an input end air pressure prediction model of a current node in each prediction period of the natural gas metering valve to obtain an air pressure data sequence, obtaining a pressure stabilizing section of the output end of the natural gas metering valve corresponding to the current node, mapping the pressure stabilizing section of the output end of the natural gas metering valve to an input space to obtain the pressure stabilizing section of the input end of the natural gas metering valve, when the air pressure data sequence contains an air pressure value exceeding the pressure stabilizing section of the input end, obtaining an air pressure value sequence exceeding the pressure stabilizing section of the input end and a corresponding time value sequence, obtaining the minimum value in the time value sequence, and generating an opening adjustment control instruction of the natural gas metering valve according to the current time point and the minimum value, so that the service life of the natural gas metering valve can be prolonged under the condition of guaranteeing the stability of the pressure or flow of the output end.
Drawings
FIG. 1 is a schematic block diagram of a control system for a natural gas metering valve provided in accordance with one embodiment of the present application;
FIG. 2 is a schematic block diagram of a control device for a natural gas metering valve provided in one embodiment of the present application;
fig. 3 is a flow chart of a control method for a natural gas metering valve provided in one embodiment of the present application.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.
In the description of the present application, the term "plurality" means two or more, unless explicitly defined otherwise, the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. The terms "coupled," "mounted," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of this specification, the terms "one embodiment," "some implementations," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
A control apparatus and method for a natural gas metering valve according to some embodiments of the present invention are described below with reference to the accompanying drawings.
As shown in fig. 1, the technical solution of the present invention is applied to a control system for a natural gas metering valve, and is characterized by comprising a plurality of control nodes for controlling each natural gas metering valve, a background server for remotely configuring and controlling the control nodes, a database server for storing data of the natural gas metering valve, and a model training server for training an input air pressure prediction model and an input flow prediction model of each natural gas metering valve, wherein the control nodes acquire pressure data and flow data of an input end and an output end of the natural gas metering valve in real time and send the pressure data and the flow data of the input end and the output end of the natural gas metering valve to the background server, the background server sends the pressure data and the flow data of the input end of the natural gas metering valve to the database server, and sends the pressure data and the flow data of the input end of the natural gas metering valve to the model training server for training the input air pressure prediction model and the input flow prediction model of each natural gas metering valve, and the background server acquires the pressure data and the flow prediction model of the natural gas metering valve from the background server, so that the pressure and flow of the natural gas metering valve can be predicted by the control nodes, and the flow of the natural gas metering valve can be controlled by the control nodes, and the natural gas metering valve can be predicted by the pressure prediction model.
Preferably, in the technical solution of some embodiments of the present invention, the control system for a natural gas metering valve further includes a computer cluster for providing calculation, and the model training server is connected to the computer cluster to train the input air pressure prediction model and the input flow prediction model of the natural gas metering valve through the computer cluster.
As shown in fig. 2, a first aspect of the present invention proposes a control device for a natural gas metering valve, comprising a first communication unit for communication connection with the natural gas metering valve, a second communication unit for communication connection with a background server, a memory for storing an input air pressure prediction model and an input flow prediction model of the natural gas metering valve, and a processor, wherein the processor acquires pressure data and flow data of an input end and an output end of the natural gas metering valve from the natural gas metering valve through the first communication unit, and transmits the pressure data and the flow data of the input end and the output end of the natural gas metering valve to the background server through the second communication unit. As shown in fig. 3, the processor is configured to:
Acquiring a prediction period T of the air pressure of an input end of a preset natural gas metering valve prd Predicted time period T pdn ；
At each prediction period T prd Predicting the air pressure of the input end of the natural gas metering valve by using an input end air pressure prediction model of the current node to obtain the time length which is equal to the prediction time length T pdn Is a barometric data sequence P (t) i ) Wherein i is a positive integer between 1 and n, n being the barometric data sequence P (t i ) A discrete number of barometric pressure values;
recording the current time point t now ；
Acquiring a voltage stabilizing interval of an output end of a natural gas metering valve corresponding to a current node
The pressure stabilizing section of the output end of the natural gas metering valveMapping to the input space to obtain the pressure stabilizing section of the input end of the natural gas metering valve>
Wherein 0 < θ now ＜1，θ now K is the flow coefficient of the natural gas metering valve for the current opening degree of the natural gas metering valve;
determining the barometric pressure data sequence P (t) i ) Whether or not to contain a voltage stabilizing section beyond the input endIs a gas pressure value of (2);
when the barometric data sequence P (t i ) Comprises a voltage stabilizing section exceeding the input endWhen the air pressure value of the input end is exceeded, a pressure stabilizing section is acquired>Is a sequence of air pressure values pj and a corresponding sequence of time values t j Wherein j is 1 to m p Positive integer between m p For the barometric data sequence P (t i ) Is included beyond the voltage stabilizing section of the input terminal>Is a discrete air pressure value of (a);
acquiring the time value sequence t i The minimum value of (3):
according to time point t now And the minimum value t min And generating an opening adjustment control instruction of the natural gas metering valve.
In the technical scheme of the invention, each control device for the natural gas metering valve is a control node in the control system for the natural gas metering valve. Preferably, the processor of the control device comprises a CPU (Central Processing Unit ) for executing a control program and a GPU (Graphics Processing Unit, graphics processor) for predicting pressure data and flow data at the input and output of the natural gas metering valve.
Specifically, in the technical scheme of the invention, a corresponding voltage stabilizing section and/or a current stabilizing section is configured for each node in advance, namely, a voltage stabilizing section is configured for a voltage stabilizing requirement user of natural gas, and a current stabilizing section is configured for a current stabilizing requirement user of natural gas. The pressure stabilizing section and the flow stabilizing section are respectively a natural gas conveying pressure fluctuation range and a natural gas flow fluctuation range which do not influence the normal use of a user of the current node.
The prediction period T of the air pressure at the input end of the natural gas metering valve prd The time interval for which the air pressure prediction at the input of the natural gas metering valve is performed for two adjacent times that are pre-configured. The predicted duration T of the air pressure at the input end of the natural gas metering valve pdn The time length of the air pressure of the input end of the natural gas metering valve is predicted by taking the time point of the air pressure prediction of the input end of the natural gas metering valve as a time starting point.
In the technical scheme of the invention, each natural gas metering valve is provided with an independent control device, the control device is used as a control node to be connected with a background server, and the current node refers to a control device of the current natural gas metering valve.
The barometric pressure data sequence P (t i ) Is a set of discrete time-air key value pairs, i.e. it contains two sets of data sequences corresponding one to one, one set is time sequence t 1 ，t 2 ，…，t n One group is the air pressure sequence p 1 ，p 2 ，…，p n Two sets of data being in one-to-one correspondence, e.g. p 1 The time point obtained for prediction is t 1 And satisfies the following:
t n -t 1 ＝T pdn 。
the current time point t now For each prediction period T prd A point in time at which the air pressure prediction at the input of the natural gas metering valve begins to be performed.
Further, in the control apparatus for a natural gas metering valve described above, the processor is configured to:
at each prediction period T prd Predicting the flow of the input end of the natural gas metering valve by using an input end flow prediction model of the current node to obtain a time length which is equal to the prediction time length T pdn Traffic data sequence Q (t) i )；
Obtaining a steady flow interval of an output end of a natural gas metering valve corresponding to a current node
The steady flow interval of the output end of the natural gas metering valveMapping to the input space to obtain a steady flow interval of the input end of the natural gas metering valve>
Wherein Δp max Monitoring the resulting maximum pressure differential between the input and output of the natural gas metering valve;
determining the flow data sequence Q (t i ) Whether or not to contain a steady flow interval beyond the input endIs a flow value of (1);
when the flow data sequence Q (t i ) Comprises a steady flow section exceeding the input endWhen the flow value of (2) exceeds the steady flow interval of the input end>Flow value sequence q l And its corresponding time value sequence t l Wherein l is 1 to m q Positive integer between m q For the sequence of traffic data Q (t i ) The included steady flow interval beyond the input end +. >Is the number of discrete flow values;
acquiring the time value sequence t l The minimum value of (3):
according to time point t now And the minimum value t min And generating an opening adjustment control instruction of the natural gas metering valve.
Likewise, the flow data sequence Q (t i ) Is a set of discrete time flow key value pairs, i.e. it contains two sets of data sequences corresponding one to one, one set isTime series t 1 ，t 2 ，…，t n One group is a flow sequence q 1 ，q 2 ，…，q n Two sets of data being in one-to-one correspondence, e.g. q 1 The time point obtained for prediction is t 1 Is used for the flow value of (a).
It should be noted that since the subsequent calculation steps are identical, for simplicity of expression, from the time series t j And time series t l The obtained minimum values are all marked by t min Representation, due to two time sequences t j And t l Is not the same and therefore the minimum value t obtained from these two time sequences min Nor is it the same. In some embodiments of the present invention, when one natural gas user is a pressure stabilizing requirement user and a flow stabilizing requirement user at the same time, a pressure stabilizing interval and a flow stabilizing interval are configured for the natural gas user at the same time, and a time value sequence t is obtained j Time sequence t l And after the minimum values are respectively obtained, the smaller value is taken as the minimum value t in the subsequent calculation min 。
Further, in the control device for a natural gas metering valve described above, at a time point t according to now And the minimum value t min In the step of generating the opening degree adjustment control instruction of the natural gas metering valve, the processor is configured to:
calculating the current time point t now And the minimum value t min Time difference between:
Δt min ＝t min -t now ；
acquiring the current opening theta of the natural gas metering valve now ；
Based on the time difference Δt min Calculating the target opening theta of the natural gas metering valve target ；
Calculating the opening adjustment span of the natural gas metering valve:
Δθ target ＝θ target -θ now ；
adjusting the span delta theta according to the opening degree target Generating the natural gas metering valveOpening degree adjustment control command of (a).
Specifically, the target opening degree θ target In order to make the air pressure value of the output end of the natural gas metering valve at a time point t min Falling into the voltage stabilizing section of the output endOr a steady flow interval->Is a constant value.
Further, in the control device for a natural gas metering valve described above, the time difference Δt is based on min Calculating the target opening theta of the natural gas metering valve target In the step (a), the processor is configured to:
acquiring a preset opening adjustment speed v of a natural gas metering valve θ ；
Acquisition time point t min Corresponding air pressure value
Calculating a first boundary opening degree and a second boundary opening degree of the natural gas metering valve:
according to the first boundary opening degree theta 1 And the second boundary opening degree theta 2 Determining the target opening degree theta target 。
Specifically, a driving mechanism, such as a motor, connected to the natural gas metering valve can adjust the opening of the natural gas metering valve within a certain speed range, and in the practical implementation process, the driving speed of the driving mechanism is too high, which results in a related mechanical junctionThe service life of the structure such as a motor, a connecting piece, a valve and the like is shortened, and the service requirement cannot be met if the speed is too slow. In the technical scheme of the invention, a moderate adjusting speed is configured for the driving mechanism, so that the driving mechanism and related mechanical structures can be ensured to have longer service life while the use requirement is met, and the adjusting speed can be obtained through measurement under the laboratory condition. The opening degree adjusting speed v θ Is obtained by converting the adjustment speed of the driving mechanism.
Further, in the control device for a natural gas metering valve described above, the time difference Δt is based on min Calculating the target opening theta of the natural gas metering valve target In the step (a), the processor is configured to:
Taking the opening adjusting speed v of a preset natural gas metering valve θ ；
Acquisition time point t min Corresponding flow value
Calculating a third boundary opening degree and a fourth boundary opening degree of the natural gas metering valve:
according to the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 Determining the target opening degree theta target 。
Further, in the control device for a natural gas metering valve described above, the control device is configured to control the valve according to the first boundary opening degree θ 1 And the second boundary opening degree theta 2 Or the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 Determining the target opening degree theta target In the step (a), the processor is configured toThe method comprises the following steps:
calculating and adjusting to the first boundary opening degree theta 1 And the second boundary opening degree theta 2 Or the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 First and second adjustment times required:
or alternatively
When (when)Or->When (I)>Determining Δt min Whether or not is greater than->
When (when)At the time, the second boundary opening degree theta 2 Or the fourth boundary opening degree theta 4 Determining the target opening degree, namely:
θ target ＝θ 2 or (b)
θ target ＝θ 4 。
Further, in the control device for a natural gas metering valve described above, the determination of Δt is performed min Whether or not it is greater thanAfter the step of (a), the processor is configured to ：
When (when)Based on the time value sequence t j The minimum value t of (2) min Calculating the target opening degree:
θ target ＝θ now +v θ ·Δt min 。
further, in the control device for a natural gas metering valve described above, the control device calculates the first boundary opening degree θ 1 And the second boundary opening degree theta 2 Or the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 After the steps of the first adjustment time and the second adjustment time required, the processor is configured to:
when (when)Or->When (I)>Determining Δt min Whether or not is greater than->
When (when)At the time, the first boundary opening degree theta 1 Or the third boundary opening degree theta 3 Determining the target opening degree, namely:
θ target ＝θ 1 or (b)
θ target ＝θ 3 。
Further, in the control device for a natural gas metering valve described above, the determination of Δt is performed min Whether or not it is greater thanAfter the step of (a), the processor is configured to:
when (when)Based on the time value sequence t j The minimum value t of (2) min Calculating the target opening degree:
θ target ＝θ now +v θ ·Δt min 。
as shown in fig. 3, a second aspect of the present invention proposes a control method for a natural gas metering valve, comprising:
acquiring a prediction period T of the air pressure of an input end of a preset natural gas metering valve prd Predicted time period T pdn ；
At each prediction period T prd Predicting the air pressure of the input end of the natural gas metering valve by using an input end air pressure prediction model of the current node to obtain the time length which is equal to the prediction time length T pdn Is a barometric data sequence P (t) i ) Wherein i is a positive integer between 1 and n, n being the barometric data sequence P (t i ) A discrete number of barometric pressure values;
recording the current time point t now ；
Acquiring a voltage stabilizing interval of an output end of a natural gas metering valve corresponding to a current node
The pressure stabilizing section of the output end of the natural gas metering valveMapping to the input space to obtain the pressure stabilizing section of the input end of the natural gas metering valve>
Wherein 0 is<θ now <1，θ now K is the flow coefficient of the natural gas metering valve for the current opening degree of the natural gas metering valve;
determining the barometric pressure data sequence P (t) i ) Whether or not to contain a voltage stabilizing section beyond the input endIs a gas pressure value of (2);
when the barometric data sequence P (t i ) Comprises a voltage stabilizing section exceeding the input endWhen the air pressure value of the input end is exceeded, a pressure stabilizing section is acquired>Is a barometric pressure value sequence p j And its corresponding time value sequence t j Wherein j is 1 to m p Positive integer between m p For the barometric data sequence P (t i ) Is included beyond the voltage stabilizing section of the input terminal>Is a discrete air pressure value of (a);
acquiring the time value sequence t j The minimum value of (3):
according to time point t now And the minimum value t min And generating an opening adjustment control instruction of the natural gas metering valve.
Specifically, in the technical scheme of the invention, a corresponding voltage stabilizing section and/or a current stabilizing section is configured for each node in advance, namely, a voltage stabilizing section is configured for a voltage stabilizing requirement user of natural gas, and a current stabilizing section is configured for a current stabilizing requirement user of natural gas. The pressure stabilizing section and the flow stabilizing section are respectively a natural gas conveying pressure fluctuation range and a natural gas flow fluctuation range which do not influence the normal use of a user of the current node.
The prediction period T of the air pressure at the input end of the natural gas metering valve prd The time interval for which the air pressure prediction at the input of the natural gas metering valve is performed for two adjacent times that are pre-configured. The predicted duration T of the air pressure at the input end of the natural gas metering valve pdn The time length of the air pressure of the input end of the natural gas metering valve is predicted by taking the time point of the air pressure prediction of the input end of the natural gas metering valve as a time starting point.
In the technical scheme of the invention, each natural gas metering valve is provided with an independent control device, the control device is used as a control node to be connected with a background server, and the current node refers to a control device of the current natural gas metering valve.
The barometric pressure data sequence P (t i ) Is a set of discrete time-air key value pairs, i.e. it contains two sets of data sequences corresponding one to one, one set is time sequence t 1 ，t 2 ，…，t n One group is the air pressure sequence p 1 ，p 2 ，…，p n Two sets of data being in one-to-one correspondence, e.g. p 1 The time point obtained for prediction is t 1 And satisfies the following:
t n -t 1 ＝T pdn 。
the current time point t now For each prediction period T prd A point in time at which the air pressure prediction at the input of the natural gas metering valve begins to be performed.
Further, in the control method for a natural gas metering valve, the control method further includes:
at each prediction period T prd Predicting the flow of the input end of the natural gas metering valve by using an input end flow prediction model of the current node to obtain a time length which is equal to the prediction time length T pdn Traffic data sequence Q (t) i )；
Obtaining a steady flow interval of an output end of a natural gas metering valve corresponding to a current node
The steady flow interval of the output end of the natural gas metering valveMapping to the input space to obtain a steady flow interval of the input end of the natural gas metering valve>
Wherein Δp max Monitoring the resulting maximum pressure differential between the input and output of the natural gas metering valve;
determining the flow data sequence Q (t i ) Whether or not to contain a steady flow interval beyond the input endIs a flow value of (1);
when the flow data sequence Q (t i ) Comprises a steady flow section exceeding the input endWhen the flow value of (2) exceeds the steady flow interval of the input end>Flow value sequence q l And its corresponding time value sequence t l Wherein l is 1 to m q Positive integer between m q For the sequence of traffic data Q (t i ) The included steady flow interval beyond the input end +.>Is the number of discrete flow values;
acquiring the time value sequence t l The minimum value of (3):
according to time point t now And the minimum value t min And generating an opening adjustment control instruction of the natural gas metering valve.
Likewise, the flow data sequence Q (t i ) Is a set of discrete time flow key value pairs, namely, the key value pairs comprise two sets of data sequences corresponding to each other one by one, and one set is a time sequence t 1 ，t 2 ，…，t n One group is a flow sequence q 1 ，q 2 ，…，q n Two sets of data being in one-to-one correspondence, e.g. q 1 The time point obtained for prediction is t 1 Is used for the flow value of (a).
It should be noted that since the subsequent calculation steps are identical, for simplicity of expression, from the time series t j And time series t l The obtained minimum values are all marked by t min Representation, due to two time sequences t j And t l Is not the same and therefore the minimum value t obtained from these two time sequences min Nor is it the same. In some embodiments of the present invention, when one natural gas user is a pressure stabilizing requirement user and a flow stabilizing requirement user at the same time, a pressure stabilizing interval and a flow stabilizing interval are configured for the natural gas user at the same time, and a time value sequence t is obtained j Time sequence t l And after the minimum values are respectively obtained, the smaller value is taken as the minimum value t in the subsequent calculation min 。
Further, in the control method for a natural gas metering valve described above, according to the time point t now And the minimum value t min The step of generating the opening degree adjustment control command of the natural gas metering valve specifically comprises the following steps:
calculating the current time point t now And the minimum value t min Time difference between:
Δt min ＝t min -t now ；
acquiring the current opening theta of the natural gas metering valve now ；
Based on the time difference Δt min Calculating the target opening theta of the natural gas metering valve target ；
Calculating the opening adjustment span of the natural gas metering valve:
Δθ target ＝θ target -θ now ；
adjusting the span delta theta according to the opening degree target And generating an opening adjustment control instruction of the natural gas metering valve.
Specifically, the target opening degree θ target In order to make the air pressure value of the output end of the natural gas metering valve at a time point t min Falling into the voltage stabilizing section of the output end Or a steady flow interval->Is a constant value.
Further, in the control method for a natural gas metering valve described above, the time difference Δt is based on min Calculating the target opening theta of the natural gas metering valve target The method specifically comprises the following steps:
acquiring a preset opening adjustment speed v of a natural gas metering valve θ ；
Acquisition time point t min Corresponding air pressure value
Calculating a first boundary opening degree and a second boundary opening degree of the natural gas metering valve:
/>
according to the first boundary opening degree theta 1 And the second boundary opening degree theta 2 Determining the target opening degree theta target 。
Specifically, a driving mechanism such as a motor connected with the natural gas metering valve can adjust the opening of the natural gas metering valve within a certain speed range, and in the practical implementation process, the driving speed of the driving mechanism is too fast to cause the service life of related mechanical structures such as a motor, a connecting piece, a valve and the like to be shortened, and the speed is too slow to be suitable for use requirements. In the technical scheme of the invention, a moderate adjusting speed is configured for the driving mechanism, so that the driving mechanism and related mechanical structures can be ensured to have longer service life while the use requirement is met, and the adjusting speed can be obtained through measurement under the laboratory condition. The opening degree adjusting speed v θ Is obtained by converting the adjustment speed of the driving mechanism.
Further, in the control method for a natural gas metering valve described above, the time difference Δt is based on min Calculating the target opening theta of the natural gas metering valve target The method specifically comprises the following steps:
taking the opening adjusting speed v of a preset natural gas metering valve θ ；
Acquisition time point t min Corresponding flow value
Calculating a third boundary opening degree and a fourth boundary opening degree of the natural gas metering valve:
according to the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 Determining the target opening degree theta target 。
Further, in the control method for a natural gas metering valve described above, the control method is performed based on the first boundary opening θ 1 And the second boundary opening degree theta 2 Or the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 Determining the target opening degree theta target The method specifically comprises the following steps:
calculating and adjusting to the first boundary opening degree theta 1 And the second boundary opening degree theta 2 Or the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 First and second adjustment times required:
or alternatively
When (when)Or->When (I)>Determining Δt min Whether or not is greater than->
When (when)At the time, the second boundary opening degree theta 2 Or the fourth boundary opening degree theta 4 Determining the target opening degree, namely:
θ target ＝θ 2 or (b)
θ target ＝θ 4 。
Further, in the control method for a natural gas metering valve described above, Δt is determined min Whether or not it is greater thanAfter the step of (a), further comprising:
when (when)Based on the time value sequence t j The minimum value t of (2) min Calculating the target opening degree:
θ target ＝θ now +v θ ·Δt min 。
further, in the control method for a natural gas metering valve described above, the control value is calculated and adjusted to the first boundary opening degree θ 1 And the second boundary opening degree theta 2 Or the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 After the steps of the first adjustment time and the second adjustment time, which are required, the method further comprises:
when (when)Or->For (I)>Determining Δt min Whether or not is greater than->
When (when)At the time, the first boundary opening degree theta 1 Or the third boundary opening degree theta 3 Determining the target opening degree, namely:
θ target ＝θ 1 or (b)
θ target ＝θ 3 。
Further, in the control method for a natural gas metering valve described above, Δt is determined min Whether or not it is greater thanAfter the step of (a), further comprising:
when (when)Based on the time value sequence t j The minimum value t of (2) min Calculating the target opening degree:
θ target ＝θ now +v θ ·Δt min 。
it should be noted that in this document relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Embodiments in accordance with the present invention, as described above, are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (10)
1. A control arrangement for a natural gas metering valve, comprising a first communication unit for communication connection with the natural gas metering valve, a second communication unit for communication connection with a background server, a memory for storing an input gas pressure prediction model and an input flow prediction model of the natural gas metering valve, and a processor, the processor obtaining pressure data and flow data of its input and output from the natural gas metering valve via the first communication unit, transmitting the pressure data and flow data of its input and output to the background server via the second communication unit, the processor being configured to:
Acquiring a prediction period T of the air pressure of an input end of a preset natural gas metering valve prd Predicted time period T pdn ；
At each prediction period T prd Predicting the air pressure of the input end of the natural gas metering valve by using an input end air pressure prediction model of the current node to obtain the time length which is equal to the prediction time length T pdn Is a barometric data sequence P (t) i ) Wherein i is a positive integer between 1 and n, n being the barometric data sequence P (t i ) A discrete number of barometric pressure values;
recording the current time point t now ；
Acquiring a voltage stabilizing interval of an output end of a natural gas metering valve corresponding to a current node
The pressure stabilizing section of the output end of the natural gas metering valveMapping to the input space to obtain the pressure stabilizing section of the input end of the natural gas metering valve>
Wherein 0 is<θ now <1，θ now K is the flow coefficient of the natural gas metering valve for the current opening degree of the natural gas metering valve;
determining the barometric pressure data sequence P (t) i ) Whether or not to contain a voltage stabilizing section beyond the input endIs a gas pressure value of (2);
when the barometric data sequence P (t i ) Comprises a voltage stabilizing section exceeding the input endWhen the air pressure value of the input end is exceeded, a pressure stabilizing section is acquired>Is a barometric pressure value sequence p j And its corresponding time value sequence t j Wherein j is 1 to m p Positive integer between m p For the barometric data sequence P (t i ) Is included beyond the voltage stabilizing section of the input terminal>Is a discrete air pressure value of (1)Number of pieces;
acquiring the time value sequence t j The minimum value of (3):
according to time point t now And the minimum value t min And generating an opening adjustment control instruction of the natural gas metering valve.
2. A control method for a natural gas metering valve, comprising:
acquiring a prediction period T of the air pressure of an input end of a preset natural gas metering valve prd Predicted time period T pdn ；
At each prediction period T prd Predicting the air pressure of the input end of the natural gas metering valve by using an input end air pressure prediction model of the current node to obtain the time length which is equal to the prediction time length T pdn Is a barometric data sequence P (t) i ) Wherein i is a positive integer between 1 and n, n being the barometric data sequence P (t i ) A discrete number of barometric pressure values;
recording the current time point t now ；
Acquiring a voltage stabilizing interval of an output end of a natural gas metering valve corresponding to a current node
The pressure stabilizing section of the output end of the natural gas metering valveMapping to the input space to obtain the pressure stabilizing section of the input end of the natural gas metering valve>
Wherein 0 < θ now ＜1，θ now K is the flow coefficient of the natural gas metering valve for the current opening degree of the natural gas metering valve;
Determining the barometric pressure data sequence P (t) i ) Whether or not to contain a voltage stabilizing section beyond the input endIs a gas pressure value of (2);
when the barometric data sequence P (t i ) Comprises a voltage stabilizing section exceeding the input endWhen the air pressure value of the input end is exceeded, a pressure stabilizing section is acquired>Is a barometric pressure value sequence p j And its corresponding time value sequence t j Wherein j is 1 to m p Positive integer between m p For the barometric data sequence P (t i ) Is included beyond the voltage stabilizing section of the input terminal>Is a discrete air pressure value of (a);
acquiring the time value sequence t j The minimum value of (3):
according to time point t now And the minimum value t min And generating an opening adjustment control instruction of the natural gas metering valve.
3. The control method for a natural gas metering valve of claim 2, further comprising:
at each prediction period T prd Predicting the flow of the input end of the natural gas metering valve by using an input end flow prediction model of the current node to obtain a time length which is equal to the prediction time length T pdn Traffic data sequence Q (t) i )；
Obtaining a steady flow interval of an output end of a natural gas metering valve corresponding to a current node
The steady flow interval of the output end of the natural gas metering valveMapping to the input space to obtain a steady flow interval of the input end of the natural gas metering valve >
Wherein Δp max Monitoring the resulting maximum pressure differential between the input and output of the natural gas metering valve;
determining the flow data sequence Q (t i ) Whether or not to contain a steady flow interval beyond the input endIs a flow value of (1);
when the flow data sequence Q (t i ) Comprises a steady flow section exceeding the input endWhen the flow value of (2) exceeds the steady flow interval of the input end>Flow value sequence q l And its corresponding time value sequence t l Wherein l is 1 to m q Positive integer between m q For the sequence of traffic data Q (t i ) The included steady flow interval beyond the input end +.>Is the number of discrete flow values;
acquiring the time value sequence t l The minimum value of (3):
according to time point t now And the minimum value t min And generating an opening adjustment control instruction of the natural gas metering valve.
4. A control method for a natural gas metering valve according to claim 2 or 3, characterized in that, according to the point in time t now And the minimum value t min The step of generating the opening degree adjustment control command of the natural gas metering valve specifically comprises the following steps:
calculating the current time point t now And the minimum value t min Time difference between:
Δt min ＝t min -t now ；
acquiring the current opening theta of the natural gas metering valve now ；
Based on the time difference Δt min Calculating the target opening theta of the natural gas metering valve target ；
Calculating the opening adjustment span of the natural gas metering valve:
Δθ target ＝θ target -θ now ；
adjusting the span delta theta according to the opening degree target Generating the natural gas gaugeAnd (3) adjusting the opening degree of the valve to control instructions.
5. Control method for a natural gas metering valve according to claim 4, characterized in that it is based on the time difference Δt min Calculating the target opening theta of the natural gas metering valve target The method specifically comprises the following steps:
acquiring a preset opening adjustment speed v of a natural gas metering valve θ ；
Acquisition time point t min Corresponding air pressure value
Calculating a first boundary opening degree and a second boundary opening degree of the natural gas metering valve:
according to the first boundary opening degree theta 1 And the second boundary opening degree theta 2 Determining the target opening degree theta target 。
6. Control method for a natural gas metering valve according to claim 4, characterized in that it is based on the time difference Δt min Calculating the target opening theta of the natural gas metering valve target The method specifically comprises the following steps:
taking the opening adjusting speed v of a preset natural gas metering valve θ ；
Acquisition time point t min Corresponding flow value
Calculating a third boundary opening degree and a fourth boundary opening degree of the natural gas metering valve:
According to the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 Determining the target opening degree theta target 。
7. Control method for a natural gas metering valve according to claim 5 or 6, characterized in that, according to the first boundary opening degree θ 1 And the second boundary opening degree theta 2 Or the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 Determining the target opening degree theta target The method specifically comprises the following steps:
calculating and adjusting to the first boundary opening degree theta 1 And the second boundary opening degree theta 2 Or the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 First and second adjustment times required:
or alternatively
When (when)Or->When (I)>Determining Δt min Whether or not is greater than->
When (when)At the time, the second boundary opening degree theta 2 Or the fourth boundary opening degree theta 4 Determining the target opening degree, namely:
θ target ＝θ 2 or (b)
θ target ＝θ 4 。
8. The control method for a natural gas metering valve according to claim 7, wherein, in determining Δt min Whether or not it is greater thanAfter the step of (a), further comprising:
when (when)Based on the time value sequence t j The minimum value t of (2) min Calculating the target opening degree:
θ target ＝θ now +v θ ·Δt min 。
9. the control method for a natural gas metering valve according to claim 7, characterized in that, in calculating the adjustment to the first boundary opening degree θ 1 And the second boundary opening degree theta 2 Or the third boundary opening degree theta 3 And the fourth boundary opening degree theta 4 After the steps of the first adjustment time and the second adjustment time, which are required, the method further comprises:
when (when)Or->When (I)>Determining Δt min Whether or not is greater than->
When (when)At the time, the first boundary opening degree theta 1 Or the third boundary opening degree theta 3 Determining the target opening degree, namely:
θ target ＝θ 1 or (b)
θ target ＝θ 3 。
10. A control method for a natural gas metering valve as claimed in claim 9, characterized in that,
at the judgment of Deltat min Whether or not it is greater thanAfter the step of (a), further comprising:
when (when)Based on the time value sequence t j The minimum value t of (2) min Calculating the target opening degree:
θ target ＝θ now +v θ ·Δt min 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310956348.7A CN116974308A (en) | 2023-07-31 | 2023-07-31 | Control device and method for natural gas metering valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310956348.7A CN116974308A (en) | 2023-07-31 | 2023-07-31 | Control device and method for natural gas metering valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116974308A true CN116974308A (en) | 2023-10-31 |
Family
ID=88482824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310956348.7A Pending CN116974308A (en) | 2023-07-31 | 2023-07-31 | Control device and method for natural gas metering valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116974308A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140000610A1 (en) * | 2010-12-03 | 2014-01-02 | Fisher & Paykel Healthcare Limited | System, apparatus and method for supplying gases |
| US20150204454A1 (en) * | 2014-01-23 | 2015-07-23 | Colt Irrigation, LLC | Fluid activated flow control apparatus |
| CN108505978A (en) * | 2018-02-09 | 2018-09-07 | 中国石油天然气股份有限公司 | Gas well downhole flow control system and control method |
| CN108730050A (en) * | 2017-04-13 | 2018-11-02 | 通用汽车环球科技运作有限责任公司 | Method for using air mass flow actuator to control engine |
| CN109213219A (en) * | 2018-09-29 | 2019-01-15 | 浙江工业大学 | Pressure prediction control method for gas phase replacement and medicine moistening process of traditional Chinese medicine decoction pieces |
| CN113339580A (en) * | 2021-07-06 | 2021-09-03 | 深圳粤能能源技术有限公司 | Metering regulating valve for natural gas |
| CN115013798A (en) * | 2022-06-01 | 2022-09-06 | 新奥数能科技有限公司 | Steam supply regulation and control method and device |
| CN217977177U (en) * | 2022-07-19 | 2022-12-06 | 深圳粤能能源技术有限公司 | Noise reduction device for natural gas booster station |
| CN116085685A (en) * | 2023-03-15 | 2023-05-09 | 上海叁零肆零科技有限公司 | Method and system for guaranteeing stable gas supply of natural gas in peak period of gas consumption |
| CN116306221A (en) * | 2023-01-06 | 2023-06-23 | 南京航空航天大学 | Air pipeline system control method based on LSTM prediction model |
-
2023
- 2023-07-31 CN CN202310956348.7A patent/CN116974308A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140000610A1 (en) * | 2010-12-03 | 2014-01-02 | Fisher & Paykel Healthcare Limited | System, apparatus and method for supplying gases |
| US20150204454A1 (en) * | 2014-01-23 | 2015-07-23 | Colt Irrigation, LLC | Fluid activated flow control apparatus |
| CN108730050A (en) * | 2017-04-13 | 2018-11-02 | 通用汽车环球科技运作有限责任公司 | Method for using air mass flow actuator to control engine |
| CN108505978A (en) * | 2018-02-09 | 2018-09-07 | 中国石油天然气股份有限公司 | Gas well downhole flow control system and control method |
| CN109213219A (en) * | 2018-09-29 | 2019-01-15 | 浙江工业大学 | Pressure prediction control method for gas phase replacement and medicine moistening process of traditional Chinese medicine decoction pieces |
| CN113339580A (en) * | 2021-07-06 | 2021-09-03 | 深圳粤能能源技术有限公司 | Metering regulating valve for natural gas |
| CN115013798A (en) * | 2022-06-01 | 2022-09-06 | 新奥数能科技有限公司 | Steam supply regulation and control method and device |
| CN217977177U (en) * | 2022-07-19 | 2022-12-06 | 深圳粤能能源技术有限公司 | Noise reduction device for natural gas booster station |
| CN116306221A (en) * | 2023-01-06 | 2023-06-23 | 南京航空航天大学 | Air pipeline system control method based on LSTM prediction model |
| CN116085685A (en) * | 2023-03-15 | 2023-05-09 | 上海叁零肆零科技有限公司 | Method and system for guaranteeing stable gas supply of natural gas in peak period of gas consumption |
Non-Patent Citations (1)
| Title |
|---|
| 孟成等: "重型燃气轮机天然气供应系统整体性能仿真", 上海交通大学学报, vol. 50, no. 04, 28 April 2016 (2016-04-28), pages 483 - 489 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10222810B2 (en) | Methods for monitoring a flow controller coupled to a process chamber | |
| US9644796B2 (en) | Methods for in-situ calibration of a flow controller | |
| CN101978132B (en) | Method and apparatus for in situ testing of gas flow controllers | |
| US6882924B2 (en) | Valve flow control system and method | |
| US20130240045A1 (en) | Method for Determining a Fluid Flow Rate With a Fluid Control Valve | |
| US20130068313A1 (en) | Electronic Pressure Independent Controller For Fluid Flow Control Valve | |
| JP5090559B2 (en) | Mass flow controller | |
| CN103809437A (en) | Constant-air-volume control method for motor | |
| CN116974308A (en) | Control device and method for natural gas metering valve | |
| JP6986979B2 (en) | Real-time controls and methods for pneumatic systems | |
| CN114110940A (en) | Intelligent electric regulating valve adjusting method and system for air-conditioning water system | |
| CN113176794A (en) | Positive and negative voltage control device, positive and negative voltage control system, electronic device, storage medium, and program product | |
| EP2798965A1 (en) | Method for humidifying starting tobacco material | |
| US6076542A (en) | Fluid metering method | |
| JP6106240B2 (en) | Fluid spraying device | |
| JP6116172B2 (en) | Fluid spraying device | |
| KR20180126304A (en) | Mass flow meter for fuel cell and fuel cell system using the same | |
| CN203070122U (en) | Numerical control gas supply control device for testing gas water heater | |
| RU2603503C2 (en) | Method of using control device | |
| KR20140140623A (en) | Flow control system and method thereof | |
| CN210835739U (en) | Liquid micro-flow control equipment | |
| CN113958867B (en) | Control method, system, equipment and storage medium for natural gas pipeline | |
| WO2023110361A1 (en) | Heating system with automatic differential pressure setting | |
| Satyanarayana et al. | Effect of ambient pressure variation on closed loop gas system for India based Neutrino Observatory (INO) | |
| KR101889379B1 (en) | Liquid flow rate control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |