CN112346397B - Simulation method of distributed control system, distributed processing unit and distributed control system - Google Patents
Simulation method of distributed control system, distributed processing unit and distributed control system Download PDFInfo
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- CN112346397B CN112346397B CN201910728473.6A CN201910728473A CN112346397B CN 112346397 B CN112346397 B CN 112346397B CN 201910728473 A CN201910728473 A CN 201910728473A CN 112346397 B CN112346397 B CN 112346397B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1105—I-O
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Testing And Monitoring For Control Systems (AREA)
Abstract
The simulation method of the distributed control system specifically comprises the following steps: and adding a plurality of clamping pieces into the distributed processing unit to serve as simulation clamping pieces, and generating logic in the logic controller to enable the simulation clamping pieces to realize simulation functions, wherein the simulation functions comprise simulation of field equipment and simulation of corresponding technological processes. And connecting each analog clamping piece with a corresponding basic clamping piece for realizing control and monitoring functions in a signal manner. Simulation of the decentralized control system is effected by means of an operator station. The simulation method of the distributed control system provided by the invention can simulate the field device and the process with lower use cost. The invention also relates to a corresponding decentralized processing unit and a decentralized control system.
Description
Technical Field
The present invention relates to a simulation method, and more particularly, to a simulation method for a distributed control system, and to a distributed processing unit and a distributed control system for the simulation method.
Background
A distributed control system (Distributed Control System, abbreviated as DCS) is widely used in industrial control. In order to improve the operation and maintenance level of operators, DCS is often matched with simulation functions to realize the training of operators. The existing DCS generally adopts physical simulation or additionally configures a simulation system to realize a simulation function. Physical simulation generally only simulates the hierarchy of field devices, but cannot simulate the process, and an additional simulation system will increase the use cost.
Disclosure of Invention
The invention aims to provide a simulation method of a distributed control system, which can simulate field equipment and a process at lower cost.
It is a further object of the present invention to provide a decentralized processing unit for a decentralized control system which enables the decentralized control system to perform both control and monitoring functions and simulation functions for field devices and processes at a lower cost.
It is a further object of the present invention to provide a decentralized control system which enables simultaneous control and monitoring functions and simulation of field devices and processes at a lower cost.
The invention provides a simulation method of a distributed control system, which specifically comprises the following steps:
adding a plurality of clamping pieces into the distributed processing unit to serve as simulation clamping pieces, and generating logic in a logic controller to enable the simulation clamping pieces to realize simulation functions, wherein the simulation functions comprise simulation of field equipment and simulation of corresponding technological processes; each analog clamping piece and the corresponding basic clamping piece for realizing the control and monitoring functions are in signal connection; simulation of the decentralized control system is effected by means of an operator station.
According to the simulation method of the distributed control system, provided by the invention, a plurality of clamping pieces are added in the same distributed processing unit and new logic is divided, the original clamping pieces and logic are used for realizing the original control and monitoring functions, and the added clamping pieces and logic are used for realizing simulation of field equipment and corresponding technological processes. The two clamping pieces are correspondingly connected through signals, and the simulated field equipment and the simulated technological process are fed back to an operator station to realize simulation. The simulation method of the distributed control system simultaneously realizes the functions of control and monitoring and the functions of simulating field devices and technological processes through the original same distributed processing unit, and reduces the use cost while improving the training effect.
In an exemplary embodiment of the simulation method, the step of generating logic in the logic controller to enable the simulation card to implement the simulation function specifically includes: logic is generated in a logic controller of the decentralized processing unit to create a field device mathematical model and a corresponding process model, and the field device mathematical model and the process mathematical model are then associated with the simulation card.
In an exemplary embodiment of the simulation method, the simulation method further comprises the steps of: the simulation card is functionally configured to simulate field devices and processes.
In an exemplary embodiment of the simulation method, the step of functionally configuring the simulation card specifically includes: engineering software is used at the engineer station to functionally configure the simulation card.
In an exemplary embodiment of the simulation method, the steps of signal connection between each simulation card and the corresponding basic card for realizing the control and monitoring function are specifically as follows: the output end of the basic clamping piece is connected to the input end of the analog clamping piece through the terminal board by using the signal wire, and the input end of the basic clamping piece is connected to the output end of the analog clamping piece.
The invention also provides a decentralized processing unit which comprises a logic controller, a plurality of basic clamping pieces and a plurality of simulation clamping pieces. Logic is generated within the logic controller for controlling and monitoring the field devices and the process as well as for simulating the field devices and the process. The basic clamping pieces are respectively connected with the logic controller in a signal mode and can be controlled and monitored through logic generated by the logic controller. The simulation clamping pieces are respectively connected with the logic controller in a signal mode, and the field equipment and the corresponding technological process can be simulated through logic generated by the logic controller. The plurality of analog clamping pieces are respectively connected with the plurality of basic clamping pieces in a one-to-one correspondence manner.
The distributed processing unit provided by the invention divides the clamping pieces and the logic in the same distributed processing unit, wherein part of the clamping pieces and the logic are used for realizing the control and monitoring functions, and the other part of the clamping pieces and the logic are used for realizing the simulation of field devices and corresponding technical processes. The two parts of clamping pieces are correspondingly connected through signals, and simulation of the distributed control system can be achieved by feeding back simulated field devices and process procedures to an operator station. The decentralized processing unit enables the decentralized control system to realize the functions of control and monitoring and the functions of simulating field equipment and a technological process, so that the training effect is improved and the use cost is reduced.
In an exemplary embodiment of the decentralized processing unit, a connection terminal row is further provided, through which the analog clamping elements are each connected to the corresponding base clamping element.
The invention also provides a decentralized control system which comprises an engineer station, at least one operator station and a plurality of decentralized processing units. The decentralized processing unit, the engineer station and the operator station communicate via an industrial data bus.
In the distributed control system provided by the invention, the clamping pieces and the logic are divided in each distributed processing unit, part of the clamping pieces and the logic are used for realizing the control and monitoring functions, and the other part of the clamping pieces and the logic are used for realizing the simulation of field devices and corresponding technical processes. The two parts of clamping pieces are correspondingly connected through signals, and simulation of the distributed control system can be achieved by feeding back simulated field devices and process procedures to an operator station. The distributed control system simultaneously realizes the functions of control and monitoring and the functions of simulating field devices and technological processes, and reduces the use cost while improving the training effect.
In one exemplary embodiment of the decentralized control system, one of the decentralized processing units is a control cabinet of a digital electrohydraulic control system of the steam turbine.
In one exemplary embodiment of the decentralized control system, the industrial data bus is a field bus.
The above characteristics, technical features, advantages and implementation manners of the simulation method, the distributed processing unit and the distributed control system of the distributed control system will be further described in a clear and understandable manner with reference to the accompanying drawings.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. In the drawings, similar components or features may have the same reference numerals. Wherein, the liquid crystal display device comprises a liquid crystal display device,
fig. 1 is a schematic diagram for explaining a distributed control system.
FIG. 2 is a flow chart diagram illustrating one exemplary embodiment of a simulation method for a distributed control system.
Reference numerals
100. Decentralized processing unit
200. Operator station
300. Engineer station
400. Industrial data bus
10. Logic controller
20. Base clamping piece
30. Simulation clamping piece
40. Binding post row
Detailed Description
For a clearer understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals refer to identical or structurally similar but functionally identical components throughout the separate views.
In this document, "schematic" means "serving as an example, instance, or illustration," and any illustrations, embodiments described herein as "schematic" should not be construed as a more preferred or advantageous solution.
Fig. 1 is a schematic diagram for explaining a distributed control system, and referring to fig. 1, the distributed control system generally includes an engineer station 300, an operator station 200, and a distributed processing unit 100. The distributed processing unit 100 may control and monitor the field device through a logic matching card preset in the logic controller. The engineer station 300 is capable of configuring the dispersive processing unit 100 and generating a human-machine interface. The operator station 200 is capable of operating field devices via the man-machine interface and monitoring the status of the field devices and the process.
FIG. 2 is a flow chart diagram illustrating an exemplary embodiment of a simulation method for a distributed control system, and referring to FIG. 2, the simulation method for a distributed control system specifically includes the steps of:
and S10, adding a plurality of clamping pieces into the distributed processing unit to serve as simulation clamping pieces, and generating logic in the logic controller to enable the simulation clamping pieces to realize simulation functions, wherein the simulation functions comprise simulation of field equipment and simulation of corresponding technological processes.
Prior to step S10, the distributed processing unit has been configured to realize the control and monitoring functions, the logic controller thereof has previously generated logic for realizing the control and monitoring functions, and as shown in the left-hand dashed box in the distributed processing unit 100 of fig. 1, the card for realizing the control and monitoring functions has also been installed and configured to be completed. As shown in the dashed box on the right side of the decentralized processing unit 100 in fig. 1, step S10 is based on adding an analog card in the cabinet of the existing decentralized processing unit 100 and adding new logic in the logic controller, thereby maximally utilizing the existing configuration. In a conventional logic controller, for example, a programmable logic controller (Programmable Logic Controller, PLC), logic editing is generally performed by a memory and program. The new logic is generated by storing the characteristics of the field device and the process in a memory of the logic controller in a data form, and programming the program of the logic controller to realize the logic call of the data containing the characteristics of the field device and the process in the memory.
Step S20: and performing functional configuration on the simulation clamping piece to realize simulation on field equipment and a technological process. In step S10, the simulation card simulates the field device and the process by receiving or transmitting signals, which have the same data characteristics as the signals of the actual device and the process. However, in the two signals, the corresponding signals may not be equal in value. The functional configuration in step S20 is based on the same data feature, and the engineering design software is used at the engineer station to generate a comparison relationship between the signals received or transmitted by the analog card and the signals of the real equipment and the process flow, so that the signals received or transmitted by the analog card can be linked with the original man-machine interface in the decentralized control system. For example, the operator station 200 operates to send the actual control signals for the corresponding field devices, and after conversion, the corresponding analog cards receive analog control signals having the same data characteristics but different values. After the analog card sends an analog feedback signal corresponding to the analog process, the real feedback signal having the same data characteristics is received at the operator station 200 after conversion. Thereby realizing the real simulation of the field device and the process. However, step S20 may be omitted in the case where the signal value received or transmitted by the analog card is equal to the signal value of the actual equipment and process flow.
Step S30: and connecting each analog clamping piece with the corresponding basic clamping piece for realizing the control and monitoring functions. The method comprises the following steps: the output end of the basic clamping piece is connected to the input end of the analog clamping piece through the terminal board by using the signal wire, and the input end of the basic clamping piece is connected to the output end of the analog clamping piece. Because the basic clamping piece and the simulation clamping piece are arranged in the same decentralized processing unit, the basic clamping piece and the simulation clamping piece are connected in the simplest and flexible mode, and the material cost can be saved maximally.
Step S40: simulation of the decentralized control system is effected by means of an operator station. As the engineer station has configured the dispersive processing unit to perform the functions of control and monitoring, a human-machine interface is generated. The operator station can continue to operate the simulated field device and monitor the simulated process using the existing man-machine interface without additional configuration.
In the exemplary embodiment, the step of generating logic in the logic controller in step S10 to enable the analog card to implement the analog function specifically includes: logic is generated in a logic controller of the decentralized processing unit to establish a field device mathematical model and a corresponding process mathematical model. The method comprises the steps of storing data features of field devices and technical processes in a memory of a logic controller in the form of functional expressions respectively, programming a program of the logic controller, and establishing corresponding logical relations between the functional expressions of the field devices and the technical processes. And then further programming the program of the logic controller, and distributing the field device mathematical model and the corresponding process mathematical model to the input/output ports of the simulation clamping piece to realize the association of the field device mathematical model and the process mathematical model with the simulation clamping piece.
The mathematical model of the field device is used for simulating the field device, and is capable of receiving a control signal and simulating to generate an action, feeding back a simulation state signal corresponding to the action, for example, the mathematical model of the valve, and switching between on and off by receiving an on or off control signal, and feeding back an on or off state signal. A mathematical model of a process is used to simulate the process, which is typically affected by the state of the field device, e.g. a process is the amount of water in a tank, which is affected by the state of a valve as a field device. The valve is opened to fill water into the water tank, the water quantity in the water tank is increased, and the water quantity in the water tank is kept unchanged when the valve is closed. The process mathematical model is associated with the field device mathematical model by the logic described above. The simulation card is used for the field device mathematical model to receive the control signal and the field device mathematical model and the process mathematical model to send the feedback signal by being associated with the field device mathematical model and the process mathematical model.
In the simulation method of the distributed control system, a plurality of clamping pieces are added in the same distributed processing unit and new logic is divided, the original clamping pieces and logic are used for realizing the original control and monitoring functions, and the added clamping pieces and logic are used for realizing the simulation of field devices and corresponding technological processes. The two clamping pieces are correspondingly connected through signals, and the simulated field equipment and the simulated technological process are fed back to an operator station to realize simulation. The simulation method of the distributed control system simultaneously realizes the functions of control and monitoring and the functions of simulating field devices and technological processes through the original same distributed processing unit, and reduces the use cost while improving the training effect.
The invention also provides a decentralized processing unit, referring to fig. 1, which in an exemplary embodiment includes a logic controller 10, a plurality of base cards 20 (only one is shown in the figure), and a plurality of analog cards 30 (only one is shown in the figure). Logic for controlling and monitoring field devices and processes and for simulating field devices and processes are generated within the logic controller 10. The basic clamping pieces 20 are respectively connected with the logic controller 10 in a signal mode and can be controlled and monitored through logic generated by the logic controller 10. The analog cards 30 are respectively connected with the logic controller 10 in a signal manner, and can simulate the field devices and the corresponding technical processes through the logic generated by the logic controller 10. In the illustrated embodiment, the distributed processing unit further includes a connection terminal block 40, and the plurality of analog cards 30 are respectively connected to the plurality of signal base cards 20 through the connection terminal block 40 in a one-to-one correspondence.
The clamping pieces and the logic are divided in the same decentralized processing unit, part of the clamping pieces and the logic are used for realizing the functions of control and monitoring, and the other part of the clamping pieces and the logic are used for realizing the simulation of field devices and corresponding technical processes. The two parts of clamping pieces are correspondingly connected through signals, and simulation of the distributed control system can be achieved by feeding back simulated field devices and process procedures to an operator station. The decentralized processing unit enables the decentralized control system to realize the functions of control and monitoring and the functions of simulating field equipment and a technological process, so that the training effect is improved and the use cost is reduced.
The present invention also provides a decentralized control system comprising an engineer station 300, an operator station 200 and a plurality of decentralized processing units 100 as described above. In the illustrative embodiment, one of the decentralized processing units is a steam turbine digital electrohydraulic control system control cabinet. The decentralized processing unit 100, the engineer station 300 and the operator station 200 communicate via a fieldbus. However, not limited thereto, in other exemplary embodiments, the decentralized processing unit 100, the engineer station 300 and the operator station 200 may communicate through other industrial data buses, and the operator station 200 may be provided in plurality according to actual demands.
In the distributed control system provided by the invention, the clamping pieces and the logic are divided in each distributed processing unit, part of the clamping pieces and the logic are used for realizing the control and monitoring functions, and the other part of the clamping pieces and the logic are used for realizing the simulation of field devices and corresponding technical processes. The two parts of clamping pieces are correspondingly connected through signals, and simulation of the distributed control system can be achieved by feeding back simulated field devices and process procedures to an operator station. The distributed control system simultaneously realizes the functions of control and monitoring and the functions of simulating field devices and technological processes, and reduces the use cost while improving the training effect.
It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical examples of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications, such as combinations, divisions or repetitions of features, without departing from the technical spirit of the present invention are included in the scope of the present invention.
Claims (9)
1. The simulation method of the distributed control system is characterized by comprising the following steps of:
adding a plurality of clamping pieces into a decentralized processing unit as simulation clamping pieces, generating logic in a logic controller to enable the simulation clamping pieces to realize a simulation function, wherein the simulation function comprises simulation of field equipment and simulation of corresponding technical processes, specifically, generating logic in the logic controller of the decentralized processing unit to establish a field equipment mathematical model and a corresponding technical process mathematical model, associating the field equipment mathematical model and the technical process mathematical model with the simulation clamping pieces, associating the simulation clamping pieces with the field equipment mathematical model and the technical process mathematical model, and enabling the simulation clamping pieces to be used for receiving control signals by the field equipment mathematical model and sending feedback signals by the field equipment mathematical model and the technical process mathematical model;
the analog clamping pieces and the corresponding basic clamping pieces for realizing the control and monitoring functions are in signal connection; a kind of electronic device with high-pressure air-conditioning system
Simulation of the decentralized control system is effected by means of an operator station.
2. The simulation method of claim 1, further comprising the step of:
and performing functional configuration on the simulation clamping piece to realize simulation on field equipment and a technological process.
3. The method of claim 2, wherein the step of functionally configuring the analog card comprises:
engineering software is used at the engineer station to functionally configure the simulation card.
4. The simulation method according to claim 1, wherein the step of connecting each of the simulation cards and the corresponding basic card for realizing the control and monitoring functions by signals specifically comprises:
and the output end of the basic clamping piece is connected to the input end of the analog clamping piece through a terminal board by using a signal wire, and the input end of the basic clamping piece is connected to the output end of the analog clamping piece.
5. A dispersion processing unit characterized by comprising:
a logic controller (10) having logic for controlling and monitoring field devices and processes and logic for simulating field devices and processes generated therein;
the base clamping pieces (20) are respectively connected with the logic controller (10) in a signal mode, and can be controlled and monitored through logic generated by the logic controller (10); a kind of electronic device with high-pressure air-conditioning system
The simulation clamping pieces (30) are respectively connected with the logic controller (10) in a signal mode, and the field equipment and the corresponding technological process can be simulated through logic generated by the logic controller (10); the plurality of analog clamping pieces (30) are respectively in signal connection with the plurality of basic clamping pieces (20) in one-to-one correspondence.
6. The decentralized processing unit according to claim 5, further comprising a terminal block (40), wherein the analog clamping elements (30) are each connected to the corresponding base clamping element (20) via the terminal block.
7. A distributed control system is characterized by comprising
An engineer station (300);
at least one operator station (200); and
a plurality of decentralized processing units (100) according to claim 5 or 6, the decentralized processing units (100), the engineer stations (300) and the operator stations (200) communicating via an industrial data bus (400).
8. The decentralized control system according to claim 7, wherein one of the decentralized processing units (100) is a steam turbine digital electrohydraulic control system control cabinet.
9. The decentralized control system according to claim 8, wherein the industrial data bus (400) is a field bus.
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| JPH0756495A (en) * | 1993-08-10 | 1995-03-03 | Toshiba Corp | Virtual controller |
| CN101154213A (en) * | 2006-09-27 | 2008-04-02 | 上海电气集团股份有限公司 | Simulation platform of macrotype power station integrated automation system |
| US20090132060A1 (en) * | 2007-11-21 | 2009-05-21 | Winston Jenks | Foundation fieldbus simulation system |
| CN104077933A (en) * | 2013-06-25 | 2014-10-01 | 新华控制工程有限公司 | Virtual DCS simulation system and simulation method thereof |
| CN104615105A (en) * | 2014-12-30 | 2015-05-13 | 浙江中控科教仪器设备有限公司 | Simulation teaching system for petrochemical industry |
| CN105204420B (en) * | 2015-09-18 | 2018-03-13 | 中国南方电网有限责任公司调峰调频发电公司 | Pump-storage generator operational process and trouble shoot training system and method |
| CN106168795B (en) * | 2016-09-20 | 2022-04-12 | 航天长征化学工程股份有限公司 | Coal gasification dynamic simulation system |
| CN109523897B (en) * | 2017-09-19 | 2022-03-22 | 中核兰州铀浓缩有限公司 | Centrifugal uranium enrichment cascade operation simulation platform |
| CN109870927A (en) * | 2019-03-22 | 2019-06-11 | 哈尔滨汽轮机厂有限责任公司 | Million capacitance grade steam turbine island control logic verification platforms |
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