CN104615105A - Simulation teaching system for petrochemical industry - Google Patents
Simulation teaching system for petrochemical industry Download PDFInfo
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- CN104615105A CN104615105A CN201410840508.2A CN201410840508A CN104615105A CN 104615105 A CN104615105 A CN 104615105A CN 201410840508 A CN201410840508 A CN 201410840508A CN 104615105 A CN104615105 A CN 104615105A
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- 238000004088 simulation Methods 0.000 title claims abstract description 41
- 238000013178 mathematical model Methods 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000013499 data model Methods 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 37
- 239000007788 liquid Substances 0.000 description 7
- 238000005094 computer simulation Methods 0.000 description 6
- 238000007726 management method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004886 process control Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000013523 data management Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
Classifications
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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
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41885—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by modeling, simulation of the manufacturing system
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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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Testing And Monitoring For Control Systems (AREA)
Abstract
The invention discloses a simulation teaching system for a petrochemical industry. The simulation teaching system comprises a DCS (distributed control system) subsystem and a simulation subsystem which communicate with each other through standard industrial signals, the simulation subsystem comprises an input value access unit, a mathematical model establishing unit and a characteristic value output unit, the input value access unit receives device state information from the DCS subsystem, the mathematical model establishing unit establishes a mathematical model by the aid of a material balance relationship according to material properties and device attributes, and the characteristic value output unit is used for calculating device state signals of the input value access unit according to a data model to obtain corresponding state characteristic quantity, and transmitting the calculated state characteristic quantity to the DCS subsystem.
Description
Technical field
The present invention relates to teaching simulation modelling technique field, particularly a kind of simulation teaching system for petrochemical complex.
Background technology
Petrochemical industry is one of mainstay industry of Chinese national economy, and positive contribution has been made in the sustainable development for national economy.Meanwhile, the material running environment great majority of petrochemical industry are high pressure, high temperature, the high risk feature such as inflammable and explosive.Therefore, student cannot operate on real device.And petrochemical complex is produced and is belonged to consecutive production, and the automaticity of production line is higher.
DCS system (Distributed Control System (DCS) (control dispersion, management is concentrated)) has become one of major control means of petroleum chemical enterprise's production, along with automatization level is more and more higher, operation and the control of equipment are mainly carried out in pulpit, therefore, enterprise increases to some extent to the skilled demand of the technician of DCS control system that uses.And the practical operation of equipment and valve does not allow student arbitrarily to regulate in true factory, therefore student's plant practice can not get taking exercise, and particularly some fossilisation factories also can not allow the random intervention chemical industry workshop of student train accordingly.Therefore DCS control system is combined with simulation teaching system is current development trend.
The developing direction that DCS system combines with analogue system will certainly become that DCS system control program is debugged, DCS system training and industrial stokehold are studied.DCS system is used in industrial processes control, high-precision analog quantity, number connect test module are linked together by the mode of connection and field instrument or topworks, process data can be collected controller and controller parameter is sent to topworks.Therefore the rapidity of data transmission and reliability become the primary prerequisite that DCS system controls for process of factory production.But there is not the mode of wiring in virtual instrument in analogue system or topworks, how can ensure that the normal data exchange between realistic model produced by DCS system and computing machine, the research emphasis that rapidity that data transmit and reliability become DCS system and combine with analogue system can be ensured again.
Current simulated teaching has two broad aspect and plant entities emulation class and entirety to emulate class, and there is shortcoming is respectively: the former has the emulation factory system of real equipment, and this analogue system has real equipment, and floor area is large, and investment cost is high.The latter adopts emulation DCS system to replace real DCS system, and this simulator can only operate according to fixed mode, can not close to the real DCS Process Control System of the control system of real corporate.
Summary of the invention
The present invention is directed to prior art above shortcomings, provide a kind of simulation teaching system for petrochemical complex.The present invention is achieved through the following technical solutions:
For a simulation teaching system for petrochemical complex, comprise DCS subsystem and simulation subsystem, both are by standard industrial process signals communication;
Simulation subsystem comprises:
Input value access unit, receives the status information of equipment from DCS subsystem;
Mathematical Models unit, according to material properties and device attribute, utilizes mass balance relation founding mathematical models;
Eigenwert output unit, in order to be calculated according to data model by the equipment state signal of input value access unit, obtains corresponding status flag amount, and will calculate status flag amount and be sent to DCS subsystem.
Preferably, status information of equipment comprises the inventory of access arrangement and the valve opening of equipment.
Preferably, according to material properties and device attribute, mass balance relation founding mathematical models is utilized to comprise:
According to inventory and the physical condition of equipment, the kinetics equation of chemical reaction of access arrangement, build mathematical model.
Preferably, simulation subsystem also comprises pump and variable valve, connects DCS subsystem respectively, by the start and stop of DCS subsystem controls pump and the valve of adjustment variable valve, and reads corresponding status information.
Preferably, DCS subsystem comprises master controller, some expansion controllers, and master controller is connected by fieldbus with some expansion controllers, and the status information of equipment collected separately is sent to master controller by some expansion controllers.
Preferably, also comprise and somely to connect DCS subsystem by Industrial Ethernet: engineer station, operator station and data server; Engineer station is in order to master controller and the order of some expansion controller transfer controls, and collecting device status information; Data server is in order to real-time reception and storage device status information; Operator station is in order to filter out required status information of equipment.
The present invention makes real DCS system and analogue system combine, reach the object of best teaching, replace real process units by the real-time dynamic mathematical models wherein run, make student avoid chemical environment dangerous in practical operation process, obtain a large amount of emergency situations emergency processing experiences.
Accompanying drawing explanation
Shown in Fig. 1 is the relation schematic diagram of simulation subsystem of the present invention and DCS subsystem;
Shown in Fig. 2 is of the present invention and instrument, valve relation schematic diagram;
Shown in Fig. 3 is the relation schematic diagram of the present invention and pump.
Embodiment
Below with reference to accompanying drawing of the present invention; clear, complete description and discussion are carried out to the technical scheme in the embodiment of the present invention; obviously; as described herein is only a part of example of the present invention; it is not whole examples; based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to protection scope of the present invention.
For the ease of the understanding to the embodiment of the present invention, be further explained for specific embodiment below in conjunction with accompanying drawing, and each embodiment does not form the restriction to the embodiment of the present invention.
For a simulation teaching system for petrochemical complex, comprise DCS subsystem and simulation subsystem, DCS subsystem can use existing technology, and the present invention does not limit its selection.Simulation subsystem is completely by actual device design, and be mainly that its signal is originated different from the difference of real world control system, the data that DCS subsystem of the present invention detects are got by the calculation of simulation subsystem by mathematical model.
As shown in Figure 1, simulation subsystem is one and forms the analogue system of chemical process equipment performance, process reaction engineering characteristic by computer system; The material attribute that simulation subsystem utilizes mass balance relation founding mathematical models to simulate, communication is carried out with DCS subsystem, it by the eigenwert by a system according to the capacity of equipment size of real process and mechanical principle, write out about the matheematical equation between state of the art amount and the mass flow entering system, or according to the chemical reaction process mechanism of this device interior, write out its matheematical equation about the reaction kinetics of state of the art amount, utilize the method for mathematics, the many factors causing this eigenwert to change is combined and forms mathematical model.By detecting the state value of pertinency factor, through calculated with mathematical model, draw numerical value and the state of current characteristic value.
That is, described analogue system, at least comprises input value access unit, Mathematical Models unit, eigenwert output unit, wherein,
Input value access unit, receives the equipment state signal from DCS subsystem;
Mathematical Models unit; for the matheematical equation between state of the art amount and the streams state of the art amount entering system; or according to the chemical reaction process mechanism of device interior; prestore the quantity equation of the reaction kinetics of state of the art amount; again by those eigenwert composition data models, and will preserve;
Eigenwert output unit, the model that the data for being accessed by input value access unit are set up according to Mathematical Models unit calculates, and after obtaining eigenwert, is sent to central control chamber.
Described simulation subsystem has oneself input parameter, and these parameters normally represent the inventory entering certain equipment, as quantity of steam, air supply etc.After this tittle enters simulation subsystem, system, then according to the physical condition of equipment and the kinetics equation of chemical reaction, calculates the status flag amount of the change of this equipment state, the change of chemical reaction state, as temperature, pressure component etc.Amount due to input is a time dependent physical quantity, and thus, the output quantity of simulation subsystem is also a dynamic variable quantity.
The input signal of analogue system, mainly enters the valve opening of system material, intermediate material.Because the aperture of valve has certain corresponding relation with the mass flow flowing through valve.Near working point, there is the good goodness of fit with the situation of reality.Simulation subsystem, by the output quantity after calculating, should be the characteristic quantity of chemical system running status, be equivalent to the measured value of instrument to real system, and the I/O port by computing machine is directly delivered to and shown or deliver to DCS subsystem collection control display record on the spot.
As shown in Figures 2 and 3, the mechanicalness of simulation subsystem to valve and pump emulates, and is the method with mathematics, depicts mechanical property and the characteristics of motion of valve and pump; Described analogue system is furnished with the input port accepting valve opening or pump start stop signal, comprises on-the-spot starting outfit signal; Namely also simulation subsystem accepts the signal of DCS subsystem for the operation of valve and the operation signal for pump, and simulation subsystem delivers to DCS subsystem through the output signal that produces the real time modelling of system through the connection terminal of Displaying Meter or transmitter on the spot.
Be calculated as example with atmospheric distillation tower tower reactor liquid level height parameter, concrete numerical procedure is:
Flow rate calculation:
1. unit sampling period liquid increment: Δ Vi=(F1-F2) ÷ 3600 × k
2. atmospheric tower remaining liq volume computing: V1=Σ Δ Vi
High computational: H=V1/D
In formula: Δ Vi---unit sampling period liquid increment (m
3)
F1---enter atmospheric distillation tower amount of liquid (m
3/ h)
F2---for going out atmospheric distillation tower amount of liquid (m
3/ h))
K---system communication cycle (S)
V1---liquid volume (m in atmospheric tower
3)
H---atmospheric tower tower reactor liquid level (m)
D---atmospheric tower tower reactor diameter (m)
Semi-true object emulation technology is utilized to comprise for the DCS subsystem of Study of Control Process and the communication architecture of simulation subsystem:
The first, the computing machine building realistic model uses as the host computer of I/O data forwarding module work, the Modbus rtu protocol of all process variable transmission supporting industry standards, can transfer to the host computer client terminal that other support Modbus RTU simultaneously by process data;
The second, utilize the computing machine building realistic model, configuration Modbus rtu protocol correlation parameter, writes the process variable title of analogue system corresponding with it in each I/O data forwarding module, address and data type;
Three, I/O data forwarding module corresponding data is by hardware connection on DCS subsystem corresponding data passage, carries out real-time Transmission;
Four, transmit data acquisition standard industrial process signals, by wiring receive by DCS subsystem, and send data to DCS subsystem controller;
Five, DCS subsystem respectively expands controller as SBUS fieldbus slave node, write data communication district according to the process variable of respective controlled simulation mathematical model, DCS subsystem master controller keeps identical data communication regional address with corresponding expansion controller;
Six, DCS subsystem master controller sets up into LAN (Local Area Network) by industrial ethernet switch with DCS system engineer station, each operator station and data server, is furnished with different IP addresses respectively;
Engineer station: for specialized engineering technician design, built with corresponding configuration platform and system maintenance instrument.Generated the application system being suitable for manufacturing technique requirent by system configuration platform, concrete function comprises: system generation, database structure definition, operation configuration, process flow diagram picture configuration, report program establishment etc.And use the maintenance tool software of system can the debugging of implementation procedure net control, fault diagnosis, signal adjustment etc.
Operator station: the man-machine system be made up of Industrial PC Computer, display, keyboard, mouse, printer etc. is the man-machine interface of operating personnel's complete process monitoring management task.High-performance industrial computer, remarkable process flow diagram function, multi-window picture Presentation Function can realize the centralized displaying of production process information, centralized operation and centralized management easily.
Data server: information can be exchanged with business administration computer network (ERP or MIS), realize the real time data under business network environment and historical data collection, thus the management, the control totally integrated automation that realize whole enterprise production process.Real-time data communication between active station node and the inquiry of historical data can be realized by the operation net with reciprocity C/S feature.Data management station is for realizing the communication of system and external data source, thus the unified management of implementation procedure control data.Time synchronized server is for realizing the time synchronized of system.
Seven, the process of above-mentioned the first to the six just can realize each functional unit analogue system being successively passed to DCS subsystem by different network protocol; The technological requirement exploitation control algolithm that DCS subsystem engineer station provides according to computer simulation model, and be downloaded to DCS master, expand in controller, for the Study of Control Process of DCS subsystem and simulation mathematical model;
Eight, DCS subsystem operations person station is by the process data of I/O data forwarding module Real-time Collection simulation mathematical model, and utilizing works teacher stands the control algolithm of exploitation, and operator station can the controlled variable that provides of sending controling instruction control imitation system; Equally, steering order is successively issued to the main control of DCS subsystem by the DCS subsystem network platform described in the first to the six by the steering order that operator station sends, DCS subsystem expands controller, is finally sent to corresponding computer simulation model;
Nine, such communication network platform is utilized, the controlled variable of a certain control loop of computer simulation model is sent to DCS subsystem controller and is received by operator station, steering order is sent to DCS subsystem controller by operator, finally send the topworks in this loop of analogue system to, thus reach the stability contorting in this loop.
DCS subsystem respectively expands controller as SBUS fieldbus slave node, data communication district is write according to the process variable of respective controlled computer simulation model, DCS subsystem master controller keeps identical data communication regional address with corresponding expansion controller, in addition, must not there be repetition the fieldbus address of DCS subsystem master controller and each expansion controller.
DCS subsystem master controller sets up into LAN (Local Area Network) by industrial ethernet switch with DCS subsystem engineer station, each operator station and data server, is furnished with different IP addresses respectively and comprises following methods further:
DCS subsystem master controller utilizes fieldbus data communication district to receive the process data of the computer simulation model that each DCS system submaster controller sends, and by Industrial Ethernet, the process data of computer simulation model is sent to DCS subsystem engineer station, operator station and data server.
The technique effect that the present invention reaches is:
DCS system and computing machine are produced realistic model and are combined efficiently by the standard industrial process signals data processing method that realistic model maturation produced by a kind of DCS system 1, proposed by the invention and computing machine, for the process control use of multiple DCS system and research provide possibility.
2, utilize industrial Ethernet technology DCS system engineer station, operator station and data server and DCS system automated station can be linked together, in the LAN (Local Area Network) constructed by Industrial Ethernet, between difference in functionality station, exchanges data is very convenient.DCS system engineer station can to the process variable in DCS system controller High Speed Transfer control command and Real-time Collection controller.DCS system data server can also store the process variable gathered from DCS system automated station by real-time reception, there will not be any data to report by mistake and loss of data phenomenon, improves the safe reliability of DCS system.Multioperation person station is by the process data needed for the screening of DCS system data server.Utilize industrial Ethernet technology, the long-range operator station of multiple stage can exchange data with DCS system data server simultaneously, there will not be any data transmission blocking phenomenon, for the stability contorting of DCS system to computing machine production realistic model provides safeguard.
3, field bus technique is utilized to be linked together by the controller of DCS system.DCS system respectively expands controller for completing the process control mission of corresponding computer realistic model, utilize field bus technique, each expansion controller uses as slave node, will collect process values sends DCS system master controller to by the communications zone between respective and DCS system master controller.Field bus communication mode between DCS system controller can realize difference to expand process data that corresponding computing machine that controller collects produces realistic model and concentrate and be sent to DCS system master controller, and then for DCS system engineer station, operator station and data server.Form DCS system produces realistic model decentralised control, centralized management efficient way to computing machine.
4, the form transmitted by industry standard signal data can be solved different manufacturers DCS control system very well and share, the incompatible problem such as to substitute.Consider from cost control, skilled left-hand seat, training contents etc., the emulation factory that simple function can debug polytypic DCS is comprehensively more meaningful.Ripe standard industry I/O data acquisition technique, complete standard industrial process signals to convert digital signal to and just can simply data message be transmitted, do not need the means such as other bus protocols, at utmost can reduce data misinformation and time delay like this, also better ensure that real-time and the reliability of DCS control system.
5, this analogue system adopts real DCS Process Control System, and adapt to the trend of current automatization level high speed development, in addition, floor area is little, and investment cost is lower.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (6)
1. for a simulation teaching system for petrochemical complex, it is characterized in that, comprise DCS subsystem and simulation subsystem, both are by standard industrial process signals communication;
Described simulation subsystem comprises:
Input value access unit, receives the status information of equipment from described DCS subsystem;
Mathematical Models unit, according to material properties and device attribute, utilizes mass balance relation founding mathematical models;
Eigenwert output unit, in order to be calculated according to described data model by the equipment state signal of described input value access unit, obtains corresponding status flag amount, and will calculate status flag amount and be sent to described DCS subsystem.
2. the simulation teaching system for petrochemical complex according to claim 1, is characterized in that, described status information of equipment comprises the valve opening of inventory and the described equipment entering described equipment.
3. the simulation teaching system for petrochemical complex according to claim 1, is characterized in that, described according to material properties and device attribute, utilizes mass balance relation founding mathematical models to comprise:
According to the inventory and the physical condition of described equipment, the kinetics equation of chemical reaction that enter described equipment, build described mathematical model.
4. the simulation teaching system for petrochemical complex according to claim 1, it is characterized in that, described simulation subsystem also comprises pump and variable valve, connect described DCS subsystem respectively, by the start and stop of pump described in described DCS subsystem controls and the valve of the described variable valve of described adjustment, and read corresponding status information.
5. the simulation teaching system for petrochemical complex according to claim 1, it is characterized in that, described DCS subsystem comprises master controller, some expansion controllers, described master controller is connected by fieldbus with described some expansion controllers, and the status information of equipment collected separately is sent to described master controller by described some expansion controllers.
6. the simulation teaching system for petrochemical complex according to claim 5, is characterized in that, also comprises somely connecting described DCS subsystem by Industrial Ethernet: engineer station, operator station and data server; Described engineer station in order to described master controller and the order of described some expansion controller transfer controls, and gathers described status information of equipment; Described data server is in order to real-time reception and store described status information of equipment; Described operator station is in order to filter out required described status information of equipment.
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Cited By (6)
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CN107703778A (en) * | 2017-11-08 | 2018-02-16 | 北京阿瑞新通科技有限公司 | A kind of production of hydrocarbons processing semi-physical simulation control system and method |
CN108665752A (en) * | 2017-03-28 | 2018-10-16 | 天津天合成科技有限公司 | A kind of teaching simulation dcs |
CN109669443A (en) * | 2018-12-28 | 2019-04-23 | 中国人民解放军战略支援部队信息工程大学 | Natural gas line control system information security test device and method |
CN110070791A (en) * | 2019-04-16 | 2019-07-30 | 杭州百子尖科技有限公司 | Based on wireless technology can design mode parsing intelligent simulation device and emulation mode |
CN112346397A (en) * | 2019-08-08 | 2021-02-09 | 西门子电站自动化有限公司 | Simulation method of distributed control system, distributed processing unit and distributed control system |
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CN103135536A (en) * | 2013-02-01 | 2013-06-05 | 天津理工大学 | Data collection system (DCS) and information processing method of computer production simulation model |
CN103309321A (en) * | 2013-06-03 | 2013-09-18 | 杭州电子科技大学 | Cold state simulation system applied to coal chemical industry |
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CN108665752A (en) * | 2017-03-28 | 2018-10-16 | 天津天合成科技有限公司 | A kind of teaching simulation dcs |
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CN110070791B (en) * | 2019-04-16 | 2021-08-10 | 杭州百子尖科技股份有限公司 | Wireless technology-based designable analytic intelligent simulation device and simulation method |
CN112346397A (en) * | 2019-08-08 | 2021-02-09 | 西门子电站自动化有限公司 | Simulation method of distributed control system, distributed processing unit and distributed control system |
CN113865014A (en) * | 2021-09-14 | 2021-12-31 | 浙江中控技术股份有限公司 | Energy consumption coordination optimization method, device and equipment for large-scale cold water air-conditioning system |
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