CN106764446A - Natural gas line dispatching electric governor valve control system and method - Google Patents
Natural gas line dispatching electric governor valve control system and method Download PDFInfo
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- CN106764446A CN106764446A CN201611208511.8A CN201611208511A CN106764446A CN 106764446 A CN106764446 A CN 106764446A CN 201611208511 A CN201611208511 A CN 201611208511A CN 106764446 A CN106764446 A CN 106764446A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
Abstract
The invention provides a kind of natural gas line dispatching electric governor valve control system and method, pressure ceiling value, pressure low limit value and flow setting value need to be manually only preset, system will automatically be performed according to control logic in point defeated operation.In pipeline point defeated pressure superelevation, too low or point defeated flow superelevation, control system provided by the present invention is without artificial monitor in real time and adjustment pipe control parameter and pattern, it can be with auto-changeover control pattern, by pipeline pressure not superelevation, it is not too low premised on safe operating mode in, the defeated operation of natural qi leel is preferentially carried out by flow value set in advance, pipe natural gas point defeated process safety, steady is ensured, while lifting the defeated efficiency of flow point, human resources is saved.On the other hand, the present invention uses sensor redundancy designs module, reduces the systemic-function failure risk caused by outside single-sensor failure.
Description
Technical field
The present invention relates to natural gas line point transferring technology field, more particularly to a kind of natural gas line dispatching electric regulating valve
Control system and its method.
Background technology
As pipe natural gas are in the popularization of China and the lifting of automatic control level, the accumulating of pipe natural gas is controlled
Also gradually from initial, manually control is changed into remote auto control to mode on the spot.Existing natural gas line dispatching electric is adjusted
The basic structure of valve control system is saved by sensor, industry control host computer, programmable logic controller (PLC) (Programmable Logic
Controller, abbreviation PLC), the equipment such as electric control valve composition.
According to the difference of demand for control, sensor has a selection pressure transmitter, for the defeated pressure of control pipeline point.It is public
The number of opening is 103115243A《The control device and its method of a kind of natural gas line dispatching electric regulating valve》Patent application it is public
The control device and its method of a kind of natural gas line dispatching electric regulating valve are opened, has belonged to natural gas line point transferring technology neck
Domain.The control device includes data acquisition device, data processor, control device and follower；Data acquisition device is used to lead to
Cross the field data of PLC control stations collection；Data processor is used to carry out data filtering to field data, obtains real time data；
Control device is used for according to real time data and control parameter, obtains the controlled quentity controlled variable of electric control valve；Follower is to electric control valve
Control output limitation or current limliting after, by PLC control stand control electric control valve valve seat opening.The invention surpasses controlled volume
The control of tune amount improves the stability of Natural Gas Station electric control valve pressure and flow in zone of reasonableness；Reduce valve
Door aperture rate of change, reduces the frequency of motorized adjustment valve events, so as to reduce fault rate, saves maintenance cost.The patent
By system identifying method and pid control algorithm, the defeated pressure of control point reduces aperture change of the valve when Stress control is performed
Rate, so as to reduce the frequency of motorized adjustment valve events, reduces valve mechanical wear, saves maintenance cost.But, this is special
Profit is also limited, is to reduce the dynamic of electric control valve while the natural qi leel of control defeated pressure because it controls purpose
Working frequency, so that reduce because the valve that the defeated pressure oscillation of natural qi leel is brought is frequently switched on, reduction mechanical wear, therefore it
Control loop only has pressure control loop, does not consider the demand that control flow of user in actual production operation, it is impossible to realize flowing
Amount is automatically controlled, and a definite limitation is subject to using scope, and the invention is applied to downstream gate stop spacing from short, caliber is thin, air pressure is violent
The point defeated station of fluctuation, is but difficult to be applied to the natural qi leel of point defeated station and downstream for having demand for control to pressure and flow defeated
User.
According to the difference of demand for control, sensor also has the case of selection pressure transmitter, flowmeter, its control method
For：Using the sensor being manually set with switching control pattern, when Stress control is needed, manually pass through host computer HMI pictures
Setup pressure value and pressure control mode, when needing flow to control, manually change control model and given flow setting value again.
There is this kind of product pressure and flow to control, but need manual switching control model.If control model is set in into pressure always
Force control mode, pipeline can keep pressure security, but a point defeated flow does not reach optimum control, point defeated inefficiency., whereas if
Control model is set in flow control mode, flow control is optimal, but pipeline is it is possible that superpressure phenomenon, brings safety wind
Danger, it is therefore desirable to artificial 24 hours monitoring parameters, is unfavorable for that human resources optimize.
The content of the invention
It is an object of the invention to provide a kind of natural gas line dispatching electric governor valve control system and method, it is intended to solve
Certainly existing natural gas line control system can only control pressure, cannot automatic control flow, or need by manual switching
Control model realizes the problem of the control to pressure and flow.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of natural gas line dispatching electric governor valve control system, including：
Sensor redundancy designs module, with external natural gas line Hydraulic Power System, data acquisition and filtering capacity mismatch block
Connect respectively, sensor redundancy designs module includes multiple pressure transmitters, for will be natural in natural gas line Hydraulic Power System
The data on flows and pressure data of gas sense data acquisition and filtering capacity mismatch block；
Data acquisition and filtering capacity mismatch block, are also connected with pressure and flow-control module, and data acquisition and filtering are fault-tolerant
Module is used to gather data on flows and pressure data, and fault-tolerant, acquisition pressure measxurement is filtered to data on flows and pressure data
Value and flow measurements are simultaneously sent to pressure and flow-control module；
Tele-control system, is connected with pressure and flow-control module, flow setting value, height for receiving user input
Pressure protection setting value, low-voltage variation setting value are simultaneously sent to pressure and flow-control module；
Pressure and flow-control module, are also connected with output filter module, and pressure and flow-control module are used for according to pressure
Power measured value, flow measurements, flow setting value, high voltage protective setting value, low-voltage variation setting value, obtain electric control valve control
Signal processed is simultaneously sent to output filter module；
Output filter module, is also connected with electric control valve, and output filter module is used for motorized adjustment valve control signal
It is filtered, and filtered motorized adjustment valve control signal is sent to electric control valve；
Electric control valve, is also connected with natural gas line Hydraulic Power System, and electric control valve is used for according to filtered electronic
Governor valve control signal, flow and pressure in control natural gas line Hydraulic Power System.
On the basis of above-described embodiment, further, sensor redundancy designs module is included for sensing pressure data
3 pressure transmitters.
On the basis of above-described embodiment, further, data acquisition and filtering capacity mismatch block are used for 3 pressure invertings
The pressure data of device sensing is made the difference two-by-two, and the higher value chosen in wherein a pair of minimum pressure datas of difference is surveyed as pressure
Value.
On the basis of above-mentioned any embodiment, further, pressure and flow-control module include the first data normalizing
Change converter, the second data normalization converter, the 3rd data normalization converter, flow Control PID unit, high voltage protective control
PID unit processed, low-voltage variation Control PID unit, Gao Xuanqi, it is low select device, anti-windup saturation block, wherein：
First data normalization converter, flow Control PID unit, height select device to be linked in sequence, and form flow control circuit；
Second data normalization converter, high voltage protective Control PID unit, height select device to be linked in sequence, and form high voltage protective
Control loop；
3rd data normalization converter, low-voltage variation Control PID unit, it is low select device to be linked in sequence, formed low-voltage variation
Control loop；
Height selects device also to select device, anti-windup saturation block to be connected respectively with low；
It is low to select device to be also connected with anti-windup saturation block；
Anti-windup saturation block also with flow Control PID unit, high voltage protective Control PID unit, low-voltage variation Control PID
Unit is connected respectively；
First data normalization converter is used to obtain the input of flow Control PID according to flow measurements, flow setting value
Signal is simultaneously sent to flow Control PID unit；Flow Control PID unit is used to obtain stream according to flow Control PID input signal
Measure Control PID output signal and be sent to height and select device；
Second data normalization converter is used to obtain high voltage protective control according to pressure measuring value, high voltage protective setting value
PID input signals are simultaneously sent to high voltage protective Control PID unit；High voltage protective Control PID unit is used for according to high voltage protective control
PID input signals processed obtain high voltage protective Control PID output signal and are sent to height selects device；
3rd data normalization converter is used to obtain low-voltage variation control according to pressure measuring value, low-voltage variation setting value
PID input signals are simultaneously sent to low-voltage variation Control PID unit；Low-voltage variation Control PID unit is used for according to low-voltage variation control
PID input signals processed obtain low-voltage variation Control PID output signal and are sent to low selects device；
Height selects device for input flow rate Control PID output signal and high voltage protective Control PID output signal, in taking both
Higher value selects device output signal to export as height；
It is low to select device to select device output signal and low-voltage variation Control PID output signal for being input into height, take smaller in both
Value is sent to output filter module as motorized adjustment valve control signal, while the low control selected corresponding to device output signal of activation
Loop；
Anti-windup saturation block replaces 2 integral terms of control loop not being activated using motorized adjustment valve control signal
Value.
On the basis of above-described embodiment, further, the flow Control PID that the first data normalization converter is obtained is defeated
Enter the computing formula of signal Tq ' for Tq '=(Tq-Sq)/Sq, the second data normalization converter obtains high voltage protective Control PID
The computing formula of input signal Tpmax ' is Tpmax '=(Tp-Spmax)/Spmax, and the 3rd data normalization converter obtains low
The computing formula of pressure protection Control PID input signal Tpmin ' is Tpmin '=(Tp-Spmin)/Spmin；Wherein, Tq is flow
Measured value, Sq is flow setting value, and Tp is pressure measuring value, and Spmax is high voltage protective setting value, and Spmin is that low-voltage variation sets
Definite value.
On the basis of above-mentioned any embodiment, further, output filter module uses amplitude limit current limliting hardware unit pair
Motorized adjustment valve control signal is filtered.
A kind of natural gas line dispatching electric governor valve control method that make use of any of the above-described control system, including：
Data on flows and pressure data to natural gas in natural gas line Hydraulic Power System are sensed；
Collection data on flows and pressure data, fault-tolerant, acquisition pressure measxurement is filtered to data on flows and pressure data
Value and flow measurements；
Receive flow setting value, high voltage protective setting value, the low-voltage variation setting value of user input；
According to pressure measuring value, flow measurements, flow setting value, high voltage protective setting value, low-voltage variation setting value, obtain
The dynamic governor valve control signal of power taking；
Motorized adjustment valve control signal is filtered；
According to filtered motorized adjustment valve control signal, flow and pressure in control natural gas line Hydraulic Power System.
The beneficial effects of the invention are as follows：
The invention provides a kind of natural gas line dispatching electric governor valve control system and method, for control pipeline
Flow and pressure of the natural gas when downstream user divides defeated, only need to manually preset pressure ceiling value, pressure low limit value and stream
Amount setting value, system will automatically be performed according to control logic in point defeated operation.In the defeated pressure superelevation of pipeline point, too low or point defeated stream
Amount superelevation when, without artificial monitor in real time and adjustment pipe control parameter and pattern, the present invention can with auto-changeover control pattern,
By pipeline pressure not superelevation, it is not too low premised on safe operating mode in, preferentially carry out natural gas by flow value set in advance
Point defeated operation, ensures the safety and steady of the defeated process of pipe natural gas point, while lifting the defeated efficiency of flow point, it is to avoid point defeated operation
During operation risk caused by artificial monitoring carelessness and operational error, it is to avoid because manually in point defeated operation process
Point defeated efficiency reduction caused not in time of switching control pattern, dramatically reduces the work of artificial monitor in real time pipe parameter
Amount, optimizes and has saved drainage of human resources.On the other hand, the present invention uses sensor redundancy designs module, reduces because outer
Systemic-function failure risk caused by portion's single-sensor failure.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 shows a kind of structure of natural gas line dispatching electric governor valve control system provided in an embodiment of the present invention
Schematic diagram；
Fig. 2 shows the structural representation of a kind of pressure provided in an embodiment of the present invention and flow-control module；
Fig. 3 shows a kind of flow of natural gas line dispatching electric governor valve control method provided in an embodiment of the present invention
Figure.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the present invention, not
Limit the present invention.
Specific embodiment one
As shown in figure 1, a kind of natural gas line dispatching electric governor valve control system is the embodiment of the invention provides, including
Sensor redundancy designs module 102, data acquisition and filtering capacity mismatch block 103, pressure and flow-control module 104, output filter
Ripple module 105, electric control valve 106, tele-control system 107, wherein：
Sensor redundancy designs module 102, with external natural gas line Hydraulic Power System 101, data acquisition and filtering capacity
Mismatch block 103 is connected respectively, and sensor redundancy designs module 102 includes multiple pressure transmitters, for by natural gas line water
The data on flows and pressure data of natural gas sense data acquisition and filtering capacity mismatch block 103 in Force system 101.Pressure inverting
Device corrodes and thunder and lightning interference due in yard open-air atmosphere, being highly prone to wind and frost sleet throughout the year, single pressure transmitter
The reliability of system can be reduced as sensing device, therefore can be using the Redundancy Design of multiple pressure transmitters.The present invention is implemented
Example is not limited the number of pressure transmitter, it is preferred that on the basis of balanced construction cost and system reliability, the present invention
Embodiment can be using 3 Redundancy Designs of pressure transmitter after valve.Preferably, the embodiment of the present invention can also be in pipeline technology
Measurement loop in design to flow uses Redundancy Design, and the flowmeter of active and standby measurement loop can be by periodically comparing demarcation increasing
Strong reliability.
Data acquisition and filtering capacity mismatch block 103, are also connected with pressure and flow-control module 104, data acquisition and filter
The fault-tolerant module 103 of ripple is used to gather data on flows and pressure data, and fault-tolerant, acquisition is filtered to data on flows and pressure data
Pressure measuring value and flow measurements are simultaneously sent to pressure and flow-control module 104.Data acquisition and filtering capacity mismatch block 103
Data acquisition and filtering are fault-tolerant, by sensor redundancy and filtering method, collect safer, accurate, reliable pressure
Measured value and flow measurements.Often there is the situation of frequent fluctuation in gas discharge, by repeatedly reading flow computer number
Value, takes mean filter method, obtains flow measurements.
Tele-control system 107, is connected with pressure and flow-control module 104, and the flow for receiving user input sets
Definite value, high voltage protective setting value, low-voltage variation setting value are simultaneously sent to pressure and flow-control module 104.
Pressure and flow-control module 104, are also connected with output filter module 105, and pressure and flow-control module 104 are used
According to pressure measuring value, flow measurements, flow setting value, high voltage protective setting value, low-voltage variation setting value, obtain electronic
Governor valve control signal is simultaneously sent to output filter module 105.
Output filter module 105, is also connected with electric control valve 106, and output filter module 105 is used for electric control valve
Control signal is filtered, and filtered motorized adjustment valve control signal is sent into electric control valve 106.The present invention is implemented
Example is not limited the filtering mode of output filter module 105, it is preferred that output filter module 105 can use amplitude limit current limliting
Hardware unit is filtered to motorized adjustment valve control signal.
Electric control valve 106, is also connected with natural gas line Hydraulic Power System 101, and electric control valve 106 is used for according to filtering
Motorized adjustment valve control signal afterwards, flow and pressure in control natural gas line Hydraulic Power System 101.Natural gas was being conveyed
It is gas-liquid mixed state in journey, therefore control of the whole control system to point defeated pressure and flow is set up in natural gas line waterpower system
Unite on the basis of 101 models, electric control valve 106 is the executing agency of natural gas line pressure and flow control system, lead to
Valve seat opening control downstream pressure and the defeated flow of pipeline point are crossed, electric control valve 106 is implemented to control, actually to natural
Flow and pressure parameter in feed channel Hydraulic Power System 101 realize control.In the embodiment of the present invention, motorized adjustment valve control signal
Usually 4~20mA.
The embodiment of the present invention is used for flow and pressure of the control pipeline natural gas when downstream user divides defeated, only needs manually pre-
First setting pressure ceiling value, pressure low limit value and flow setting value, divide system in defeated operation automatically to be performed according to control logic,
In pipeline point defeated pressure superelevation, too low or point defeated flow superelevation, without manual monitoring and adjustment pipe control parameter and pattern,
But by auto-changeover control pattern, by pipeline pressure not superelevation, it is not too low premised on safe operating mode in, by setting in advance
Fixed flow value preferentially carries out the defeated operation of natural qi leel, ensures the safe, steady of the defeated process of pipe natural gas point, while lifting
The defeated efficiency of flow point, it is to avoid the operation risk in point defeated operation process caused by artificial monitoring carelessness and operational error, it is to avoid
In point defeated operation process because manually switching control pattern not in time caused by point defeated efficiency reduction, greatly mitigate manually
The workload of pipe parameter is monitored, is saved and optimization drainage of human resources.On the other hand, the embodiment of the present invention is superfluous using sensor
Remaining design module, reduces the systemic-function failure risk caused by outside single-sensor failure.
The embodiment of the present invention is not limited the determination mode of pressure measuring value, when sensor redundancy designs module 102 is wrapped
When including 3 pressure transmitters, it is preferred that data acquisition and filtering capacity mismatch block 103 can be to 3 pressures of pressure transmitter sensing
Force data makes the difference two-by-two, and chooses the higher value in wherein a pair of minimum pressure datas of difference as pressure measuring value.So
The benefit done is, it is possible to reduce because of the system risk that sensor fault and deviation are brought.Assuming that pressure transmitter mean failure rate
Failure probability is 10%, then after three select two to select Fault Tolerant Filtering high, system failure failure probability is 3 pressure transmitters
10%*10%* (1-10%)+10%*10%*10%, whole control system is general because of the failure caused by pressure transmitter failure
Rate is reduced to 1%, and the failure risk of whole control system is substantially reduced, and the system and method can be reduced because of outside single-sensor
Systemic-function failure risk caused by failure.Sensor redundancy designs module 102 and data acquisition and filtering capacity mismatch block 103
Function it is a lot, there are three to choose value, three to select average, three to select two to select average etc., but be best suitable in pipe control field it is fault-tolerant
Mode is three to select two choosings high because two probability of pressure transmitter simultaneous faults to be far smaller than a pressure transmitter therefore
Barrier, therefore first want three to select two；First principle of pipe control is safety, and pipeline superpressure is operating greateset risk, therefore is worked as
When two pressure transmitter indicating values are different, its big value would rather be believed, take overpressure protection measure, to reduce pipeline superpressure risk,
So the higher value in a pair of minimum pressure datas of selection difference is used as pressure measuring value.
The embodiment of the present invention is not limited pressure and flow-control module 104, it is preferred that as shown in Fig. 2 pressure and stream
Amount control module 104 can include the first data normalization converter, the second data normalization converter, the 3rd data normalization
Converter, flow Control PID unit, high voltage protective Control PID unit, low-voltage variation Control PID unit, Gao Xuanqi, it is low select device,
Anti-windup saturation block, wherein：First data normalization converter, flow Control PID unit, height select device to be linked in sequence, and are formed
Flow control circuit；Second data normalization converter, high voltage protective Control PID unit, height select device to be linked in sequence, and form high pressure
Protection control loop；3rd data normalization converter, low-voltage variation Control PID unit, it is low select device to be linked in sequence, formed low pressure
Protection control loop；Height selects device also to select device, anti-windup saturation block to be connected respectively with low；It is low select device also with anti-windup saturation block
Connection；Anti-windup saturation block also with flow Control PID unit, high voltage protective Control PID unit, low-voltage variation Control PID list
Unit connects respectively；Under in working order, the first data normalization converter is used to be obtained according to flow measurements, flow setting value
Flow Control PID input signal is simultaneously sent to flow Control PID unit；Flow Control PID unit is used for according to flow Control PID
Input signal obtains flow Control PID output signal and is sent to height selects device；Second data normalization converter is used for according to pressure
Power measured value, high voltage protective setting value obtain high voltage protective Control PID input signal and are sent to high voltage protective Control PID list
Unit；High voltage protective Control PID unit is used to obtain the output of high voltage protective Control PID according to high voltage protective Control PID input signal
Signal is simultaneously sent to height and selects device；3rd data normalization converter is used to be obtained according to pressure measuring value, low-voltage variation setting value
Low-voltage variation Control PID input signal is simultaneously sent to low-voltage variation Control PID unit；Low-voltage variation Control PID unit is used for root
Obtain low-voltage variation Control PID output signal and be sent to according to low-voltage variation Control PID input signal and low select device；Height selects the device to be used for
Input flow rate Control PID output signal and high voltage protective Control PID output signal, the higher value taken in both select device defeated as height
Go out signal output；It is low to select device to select device output signal and low-voltage variation Control PID output signal for being input into height, take in both compared with
Small value is sent to output filter module 105 as motorized adjustment valve control signal, while activation is low selecting corresponding to device output signal
Control loop；Anti-windup saturation block replaces 2 products of control loop not being activated using motorized adjustment valve control signal
The value of subitem.Anti-windup saturation block utilizes the output valve of the control loop being activated, i.e. motorized adjustment valve control signal, replaces
2 values of the integral term of control loop not being activated, it is to avoid integration saturation occur in the PID output valves of the control loop that is not activated
Phenomenon, at the same when can be switched with lifting controller electric control valve 106 response speed.
For pressure and flow-control module 104, control logic input signal has 5, i.e.,：Flow measurements, stream
Amount setting value, high voltage protective setting value, low-voltage variation setting value, pressure measuring value.Output signal 1, i.e.,：Electric control valve control
Signal processed.Flow Control PID unit, high voltage protective Control PID unit, low-voltage variation Control PID unit can using standard from
Dissipate PID programs or its incremental form program (formula is as follows), the specific control mode that electric operator is depended on from form.
Wherein, k is sampled signal, ukIt is the computer export value of kth time sampling instant, uk-1It is -1 sampling instant of kth
Computer export value, Δ ukIt is the increment size of the computer export of kth time sampling instant, ekIt is kth time sampling instant input
Deviation, ek-1It is the deviation of -1 sampling instant of kth input, ek-2It is the deviation of -2 sampling instants of kth input, T is
Sampling period, TDIt is derivative time, TIIt is the time of integration, KPIt is proportionality coefficient.
The embodiment of the present invention is not limited the computing formula of 3 data normalization converters, it is preferred that the first data are returned
One computing formula for changing the flow Control PID input signal Tq ' that converter is obtained is Tq '=(Tq-Sq)/Sq, and the second data are returned
One change converter obtain the computing formula of high voltage protective Control PID input signal Tpmax ' for Tpmax '=(Tp-Spmax)/
Spmax, the computing formula that the 3rd data normalization converter obtains low-voltage variation Control PID input signal Tpmin ' is Tpmin '
=(Tp-Spmin)/Spmin；Wherein, Tq is flow measurements, and Sq is flow setting value, and Tp is pressure measuring value, and Spmax is
High voltage protective setting value, Spmin is low-voltage variation setting value.The function of 3 data normalization converters is by flow and pressure
Nondimensional numerical value is melted into, the output signal after data normalization conversion is the input signal of PID unit.
The embodiment of the present invention is not limited tele-control system 107, it is preferred that tele-control system 107 can include
Central control system, stand control system, LAN.
The embodiment of the present invention is to data acquisition and filtering capacity mismatch block 103, pressure and flow-control module 104, output filter
Whether ripple module 105 is integrated not to limit, it is preferred that data acquisition and filtering capacity mismatch block 103, pressure and flow-control module
104th, output filter module 105 can be integrated in the Process Control System with programmable logic controller (PLC) as control core.Can compile
Journey logic controller is Programmable Logic Controller, abbreviation PLC.By data acquisition and filtering capacity mismatch block
103rd, pressure and flow-control module 104, output filter module 105 carries out integrated benefit is：The core control of PLC can be utilized
Make and use, three functions of module are realized with integrated PLC simultaneously, reduce useless equipment, reduce the redundancy journey of devices in system
Degree, economizes on resources and cost；On the other hand, module is more in system, and probability of malfunction and failure probability are higher, therefore integrated
The introducing of PLC can be with the stability of lifting system；The third aspect, the introducing of integrated PLC is easy to add other functions module, can be with
Conveniently realize extension functionally.
In actual applications, central control system, control system of standing, PLC, electric operator, LAN and the various network equipments
The most basic SCADA system of composition (Supervisory Control And Data Acquisition, i.e. data acquisition and prison
Depending on control system).Electric operator in the embodiment of the present invention, can be electric control valve 106.By central control system, stand
The man-machine interface of control system, user can be with sending flow rate setting value, high voltage protective setting value, low-voltage variation setting value, long-range control
PLC processed, and then electric control valve 106 is controlled, to reach the purpose of regulation pipeline gas pressure and flow.The present invention is implemented
The control system that example is provided will greatly promote the automatic control level of existing pipeline in SCADA system, ensure natural gas
Divide the safety and steady of defeated process, while lifting the defeated efficiency of flow point, to realize that unattended yard provides technical guarantee, it has
Beneficial effect is as follows：(1) simple system is easy, and control logic writes program realization in PLC completely, in the hardware foundation of PLC
Upper extensive interface is more, and extendable functions are more, without increasing other control devices, reduces the system brought by bull control
Failure risk；(2) in pipeline point defeated pressure superelevation, too low or point defeated flow superelevation, the system is without direct surveillance and control
Pipe control parameter and pattern, can with auto-changeover control pattern, by pipeline pressure not superelevation, it is not too low premised on safety
In operating mode, the defeated operation of natural qi leel is preferentially carried out by flow value set in advance, it is to avoid because manually in point defeated operation process
Point defeated efficiency reduction caused not in time of switching control pattern；(3) system only need to manually preset pressure ceiling value, pressure
Power lower limit value and flow setting value, system will automatically be performed according to control logic in point defeated operation, guarantee natural gas line safety,
Steadily, Effec-tive Function, it is to avoid the operation risk in point defeated operation process caused by artificial monitoring carelessness and remote operation are slipped up；
(4) system can greatly mitigate the workload of manual monitoring pipe parameter, save and optimization drainage of human resources.
Specific embodiment two
As shown in figure 3, the embodiment of the invention provides a kind of natural gas line that make use of any of the above-described control system
Dispatching electric governor valve control method, including：
Step S101, data on flows and pressure data to natural gas in natural gas line Hydraulic Power System are sensed；
Step S102, gathers data on flows and pressure data, and fault-tolerant, acquisition is filtered to data on flows and pressure data
Pressure measuring value and flow measurements；
Step S103, receives flow setting value, high voltage protective setting value, the low-voltage variation setting value of user input；
Step S104, according to pressure measuring value, flow measurements, flow setting value, high voltage protective setting value, low-voltage variation
Setting value, obtains motorized adjustment valve control signal；
Step S105, is filtered to motorized adjustment valve control signal；
Step S106, according to filtered motorized adjustment valve control signal, the stream in control natural gas line Hydraulic Power System
Amount and pressure.
The embodiment of the present invention is used for flow and pressure of the control pipeline natural gas when downstream user divides defeated, only needs manually pre-
First setting pressure ceiling value, pressure low limit value and flow setting value, divide system in defeated operation automatically to be performed according to control logic,
In pipeline point defeated pressure superelevation, too low or point defeated flow superelevation, without direct surveillance and control pipeline control parameter and pattern,
But by auto-changeover control pattern, by pipeline pressure not superelevation, it is not too low premised on safe operating mode in, by setting in advance
Fixed flow value preferentially carries out the defeated operation of natural qi leel, ensures the safety and steady of the natural defeated process of qi leel, while lifting flow point
Defeated efficiency, it is to avoid the operation risk in point defeated operation process caused by artificial monitoring carelessness and operational error, it is to avoid point defeated work
During industry because manually switching control pattern not in time caused by point defeated efficiency reduction, greatly mitigate manual monitoring pipe
The workload of road parameter, saves and optimization drainage of human resources.On the other hand, the embodiment of the present invention uses sensor redundancy designs
Module, reduces the systemic-function failure risk caused by outside single-sensor failure.
It should be noted that in the case where not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Mutually combination.Although present invention has been a certain degree of description, it will be apparent that, do not departing from the bar of the spirit and scope of the present invention
Under part, the appropriate change of each condition can be carried out.It is appreciated that the invention is not restricted to the embodiment, and be attributed to right and want
The scope asked, its equivalent for including each factor.
Claims (7)
1. a kind of natural gas line dispatching electric governor valve control system, it is characterised in that including：
Sensor redundancy designs module, is connected respectively with natural gas line Hydraulic Power System, data acquisition and filtering capacity mismatch block, passes
Sensor Redundancy Design module includes multiple pressure transmitters, for by the data on flows of natural gas in natural gas line Hydraulic Power System
Data acquisition and filtering capacity mismatch block are sensed with pressure data；
Data acquisition and filtering capacity mismatch block, are also connected with pressure and flow-control module, data acquisition and filtering capacity mismatch block
For gathering data on flows and pressure data, data on flows and pressure data are filtered it is fault-tolerant, obtain pressure measuring value and
Flow measurements are simultaneously sent to pressure and flow-control module；
Tele-control system, is connected with pressure and flow-control module, is protected for receiving the flow setting value of user input, high pressure
Shield setting value, low-voltage variation setting value are simultaneously sent to pressure and flow-control module；
Pressure and flow-control module, are also connected with output filter module, and pressure and flow-control module are used to be surveyed according to pressure
Value, flow measurements, flow setting value, high voltage protective setting value, low-voltage variation setting value, obtain electric control valve control letter
Number and be sent to output filter module；
Output filter module, is also connected with electric control valve, and output filter module is used to carry out motorized adjustment valve control signal
Filtering, and filtered motorized adjustment valve control signal is sent to electric control valve；
Electric control valve, is also connected with natural gas line Hydraulic Power System, and electric control valve is used for according to filtered motorized adjustment
Valve control signal, flow and pressure in control natural gas line Hydraulic Power System.
2. natural gas line dispatching electric governor valve control system according to claim 1, it is characterised in that sensor is superfluous
Remaining design module includes 3 pressure transmitters for sensing pressure data.
3. natural gas line dispatching electric governor valve control system according to claim 2, it is characterised in that data acquisition
It is used to make the difference the pressure data that 3 pressure transmitters are sensed two-by-two with filtering capacity mismatch block, and selection wherein difference minimum
Higher value in a pair of pressure datas is used as pressure measuring value.
4. natural gas line dispatching electric governor valve control system according to claim 1 and 2, it is characterised in that pressure
Include that the first data normalization converter, the second data normalization converter, the 3rd data normalization turn with flow-control module
Parallel operation, flow Control PID unit, high voltage protective Control PID unit, low-voltage variation Control PID unit, Gao Xuanqi, the low device, anti-of selecting
Integration saturation block, wherein：
First data normalization converter, flow Control PID unit, height select device to be linked in sequence, and form flow control circuit；
Second data normalization converter, high voltage protective Control PID unit, height select device to be linked in sequence, and form high voltage protective control
Loop；
3rd data normalization converter, low-voltage variation Control PID unit, it is low select device to be linked in sequence, formed low-voltage variation control
Loop；
Height selects device also to select device, anti-windup saturation block to be connected respectively with low；
It is low to select device to be also connected with anti-windup saturation block；
Anti-windup saturation block also with flow Control PID unit, high voltage protective Control PID unit, low-voltage variation Control PID unit
Connect respectively；
First data normalization converter is used to obtain flow Control PID input signal according to flow measurements, flow setting value
And it is sent to flow Control PID unit；Flow Control PID unit is used to obtain flow control according to flow Control PID input signal
PID output signals processed are simultaneously sent to height and select device；
Second data normalization converter is used to obtain high voltage protective Control PID according to pressure measuring value, high voltage protective setting value
Input signal is simultaneously sent to high voltage protective Control PID unit；High voltage protective Control PID unit is used for according to high voltage protective control
PID input signals obtain high voltage protective Control PID output signal and are sent to height selects device；
3rd data normalization converter is used to obtain low-voltage variation Control PID according to pressure measuring value, low-voltage variation setting value
Input signal is simultaneously sent to low-voltage variation Control PID unit；Low-voltage variation Control PID unit is used for according to low-voltage variation control
PID input signals obtain low-voltage variation Control PID output signal and are sent to low selects device；
Height selects device for input flow rate Control PID output signal and high voltage protective Control PID output signal, takes larger in both
Value selects device output signal to export as height；
Low to select device to select device output signal and low-voltage variation Control PID output signal for being input into height, the smaller value taken in both is made
For motorized adjustment valve control signal is sent to output filter module, while the low control selected corresponding to device output signal of activation is returned
Road；
2 integral terms of control loop that anti-windup saturation block is not activated using the replacement of motorized adjustment valve control signal
Value.
5. natural gas line dispatching electric governor valve control system according to claim 4, it is characterised in that the first data
The computing formula of the flow Control PID input signal Tq ' that normalization converter is obtained is Tq '=(Tq-Sq)/Sq, the second data
Normalization converter obtain the computing formula of high voltage protective Control PID input signal Tpmax ' for Tpmax '=(Tp-Spmax)/
Spmax, the computing formula that the 3rd data normalization converter obtains low-voltage variation Control PID input signal Tpmin ' is Tpmin '
=(Tp-Spmin)/Spmin；Wherein, Tq is flow measurements, and Sq is flow setting value, and Tp is pressure measuring value, and Spmax is
High voltage protective setting value, Spmin is low-voltage variation setting value.
6. natural gas line dispatching electric governor valve control system according to claim 1 and 2, it is characterised in that output
Filtration module is filtered using amplitude limit current limliting hardware unit to motorized adjustment valve control signal.
7. a kind of natural gas line dispatching electric governor valve control side that make use of control system described in claim any one of 1-6
Method, it is characterised in that including：
Data on flows and pressure data to natural gas in natural gas line Hydraulic Power System are sensed；
Collection data on flows and pressure data, data on flows and pressure data are filtered it is fault-tolerant, obtain pressure measuring value and
Flow measurements；
Receive flow setting value, high voltage protective setting value, the low-voltage variation setting value of user input；
According to pressure measuring value, flow measurements, flow setting value, high voltage protective setting value, low-voltage variation setting value, electricity is obtained
Dynamic governor valve control signal；
Motorized adjustment valve control signal is filtered；
According to filtered motorized adjustment valve control signal, flow and pressure in control natural gas line Hydraulic Power System.
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| CN113778141A (en) * | 2021-08-05 | 2021-12-10 | 浙江省机电设计研究院有限公司 | Fluid pipeline flow control system controlled by segmented PID |
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