CN106506080B - A kind of field bus system and method based on nuclear power station water supply system - Google Patents
A kind of field bus system and method based on nuclear power station water supply system Download PDFInfo
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- CN106506080B CN106506080B CN201610886197.2A CN201610886197A CN106506080B CN 106506080 B CN106506080 B CN 106506080B CN 201610886197 A CN201610886197 A CN 201610886197A CN 106506080 B CN106506080 B CN 106506080B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40169—Flexible bus arrangements
- H04L12/40176—Flexible bus arrangements involving redundancy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40221—Profibus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/4026—Bus for use in automation systems
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Abstract
The present invention provides a kind of field bus system and method based on nuclear power station water supply system, which includes the water supply parameter for acquiring the water supply system, and is supplied water to steam generator secondary side, and the field device of the water level of steam generator secondary side is maintained；For transmitting control signal and receiving the fieldbus networks of detection signal；For the photoelectric conversion device assembly to control signal or the two times transfer for detecting signal progress photosignal；For processing detection signal, and send the control system of control signal, the present invention passes through the comprehensive use site bussing technique of scene equipment level in water supply system, the field device of water supply system is replaced with into smart machine, realize the control to water supply system, optimize cost, keeps final-period management and maintenance more convenient.
Description
Technical field
The present invention relates to nuclear power station technical field, in particular to a kind of field bus system based on nuclear power station water supply system
And method.
Background technique
Fieldbus refers between the field device for being mounted on manufacture or process area and the indoor automatic device of control
Digital, serial and multi-point data/address bus.In the world in existing 40 multiple fieldbus type, still without one kind
Fieldbus can cover all application layers, and every kind of fieldbus has respective technical characterstic and use scope.
Currently, fieldbus is widely used in the fields such as petroleum, electric power and chemical industry, but in commercial nuclear power station not yet
One system use site bus controls field device grade.Water supply system in the nuclear power station of existing operation is substantially
The control to field device is realized by the mode of hardwire, since water supply system equipment is relatively dispersed, results in water supply system
Cable, gantry and cable tube are excessive；Simultaneously as the field device of water supply system is not smart machine, later maintenance band is given
Carry out many troubles.
Summary of the invention
The present invention is complicated for the control system wiring of nuclear power station water supply system, at high cost, conventional field devices precision is low,
The problem of later maintenance difficulty provides a kind of field bus system and method based on nuclear power station water supply system.
The technical solution that the present invention is proposed with regard to above-mentioned technical problem is as follows:
The present invention provides a kind of field bus system based on nuclear power station water supply system, the system comprises:
Fieldbus networks, field equipment connecting, for being transmitted by different transmission path from control system to institute
It states the control signal of field device and receives the detection signal from field device；
Photoelectric conversion device assembly is separately connected the fieldbus networks and control system, for according to different transmission roads
Diameter control signal obtained or detection signal carry out the two times transfer of photosignal to control signal or detection signal, will
Control signal after conversion is sent to the fieldbus networks, or the detection signal after conversion is sent to the control and is
System.
According to above system, the fieldbus networks are Profibus bus network, the Profibus bus network
Including DP bus network and PA bus network, the DP bus network and PA bus network form the different transmission roads
Diameter；
The photoelectric conversion device assembly includes being connected in different transmission path to be used for transmission the detection signal
With the first photoelectric conversion device assembly of control signal and for transmitting when the controller excess load or failure in control system
The detection signal and the second photoelectric conversion device assembly for controlling signal；
The field device be used for unit starting, stand-by heat and shut down operating condition under acquire the water supply system to
Water parameter, and supply water to steam generator secondary side, maintain the water level of steam generator secondary side.
According to above system, the first photoelectric conversion device assembly includes:
First photoelectric converter connects the control system, for being converted to the first electric signal of the control signal
The first optical signal transmission to the second photoelectric converter of signal is controlled, the first optical signal for being also used to will test signal is converted to inspection
The second electric signal transmission of signal is surveyed to the control system；
Second photoelectric converter, one end are separately connected the DP bus network and PA bus network, and the other end passes through first
Optical fiber connects first photoelectric converter, for the first optical signal of the control signal to be converted to the second of control signal
Electric signal transmission is also used to receive the detection signal of the PA bus network to the DP bus network, and the detection is believed
Number the first electric signal be converted to the first optical signal transmission of detection signal to first photoelectric converter；
The second photoelectric conversion device assembly includes:
Third photoelectric converter is separately connected the DP bus network and PA bus network, for receiving the PA bus
The third electric signal of the detection signal is converted to the second optical signal transmission of detection signal to the 4th by the detection signal of network
Photoelectric converter is also used to the second optical signal of the control signal being converted into the 4th electric signal transmission of control signal to DP
Bus network；
4th photoelectric converter connects the control system, and connects the third photoelectric converter by the second optical fiber,
For the second optical signal of the detection signal to be converted to the 4th electric signal transmission to the control system, being also used to will be described
The third electric signal of control signal is converted to the second optical signal transmission of control signal to the third photoelectric converter.
According to above system, the control system includes:
Controller connects first photoelectric converter and is also used to for receiving and processing the detection signal according to control
System instruction generates the control signal；
Redundant manipulator connects the 4th photoelectric converter, for connecing when the controller excess load or failure
The detection signal is received and handled, is also used to generate the control signal according to control instruction；
Terminal module connects the controller and redundant manipulator by Ethernet, for according to the detection signal
Processing result generates control instruction；
The controller is also used to when itself excess load or failure, starts redundant manipulator.
According to above system, the field device includes primary scene equipment and secondary scene equipment, the primary scene
Equipment includes for being separately connected at least one isolating valve of the DP bus network and at least one feed pump, and described second is existing
Field device includes for being separately connected at least one pressure gauge of PA bus network and at least one flow instrument, wherein
The DP bus network is used to the control signal after conversion being sent to the corresponding separate pump or feed pump is held
The different movements of row, supply water to steam generator secondary side；
The PA bus network passes through the first photoelectric conversion device assembly or the second photoelectric conversion for will test signal
Device assembly transfers to the control system after carrying out secondary photoelectric conversion.
According to above system, the DP bus network includes two tunnel transmission end: main transmission end and redundant transmission end, wherein often
The end of transmission end is correspondingly arranged on terminal resistance all the way, and each terminal resistance is for reducing signal reflex.
According to above system, PA junction box, the PA are additionally provided between the PA bus network and secondary scene equipment
Junction box is used to for PA signal being split as multiple PA signals, and has short-circuit protection and overload protection.
According to above system, each isolating valve and feed pump all contain two-way receiving end, are separately connected the main biography
Defeated end and redundant transmission end, for when the main transmission end operates normally, receiving and executing the institute of the main transmission end transmission
Control signal after stating conversion；In the main transmission end operation troubles, the institute of the redundant transmission end transmission is received and executed
Control signal after stating conversion；Each pressure gauge and flow instrument are connected to single after PA junction box fractionation
A PA signal generates detection signal for acquiring the water supply parameter of the water supply system.
According to above system, the field bus system is divided into the first level, the second level and third level three-decker,
Wherein,
First level is field control level, including the primary scene equipment and secondary scene equipment, is used for the detection
The execution of the acquisition of signal and the control signal；
Second level is process control level, including the controller and redundant manipulator, to detection signal
Reason；
Third level is operation controlled stage, including the terminal module and relevant data processing equipment, for according to inspection
The processing result for surveying signal generates control signal.
The present invention also provides a kind of methods of fieldbus based on nuclear power station water supply system, comprising the following steps:
S1, unit starting, stand-by heat and shut down operating condition under, by field device acquire the water supply system to
Water parameter generates detection signal, is transferred to fieldbus networks；
S2, the detection signal is received, after the two times transfer that photosignal is carried out by photoelectric conversion device assembly, will converted
Detection signal afterwards is sent to control system；
S3, the detection signal is received and processed, control signal is sent according to processing result；
S4, the control signal is received, the two times transfer of photosignal is carried out by the photoelectric conversion device assembly, will turned
Control signal after changing is sent to the fieldbus networks；
S5, reception simultaneously send the control signal to the field device, control the field device to steam generator
Secondary side supplies water, and maintains the water level of steam generator secondary side.
According to the above method, the step S2 includes:
S21, the detection signal is received by the PA bus network；
S22, judge whether controller operation is normal；
S23, when the controller operates normally, the detection signal is received by the second photoelectric converter, and by institute
The first electric signal for stating detection signal is converted to the first optical signal of detection signal；
S24, the first optical signal of the detection signal is transferred to first photoelectric converter by the first optical fiber, and
First optical signal of the detection signal is converted to the second electric signal of detection signal, hair by first photoelectric converter
It send to the controller.
According to the above method, the step S3 includes:
S31, the second electric signal for receiving and processing the detection signal；
S32, by Ethernet, by treated, the second point signal for detecting signal is transmitted to terminal module；
S33, by the second electric signal of the terminal module detection signal that receives that treated, and generate control and refer to
It enables；
S34, the control instruction is transmitted to by the controller by Ethernet.
According to the above method, the step S4 includes:
S41, the control instruction is received by the controller and generates control signal；
S42, the first electric signal of the control signal is converted to the first of control signal by the first photoelectric converter
Optical signal；
S43, the first optical signal of the control signal is transferred to second photoelectric converter by the first optical fiber, and
First optical signal of the control signal is converted to the second electric signal of control signal, hair by second photoelectric converter
It send to the DP bus network.
According to the above method, the step S5 includes:
S51, the control signal after the conversion is received；
S52, judge whether main transmission end operation is normal；
If S53, main transmission end operate normally, the control signal after conversion is transmitted to first by main transmission end and is showed
Field device；
If S54, main transmission end operation troubles, the control signal after conversion is transmitted to first by redundant transmission end
Field device；
Unlatching when S55, the isolating valve in primary scene equipment or feed pump receive the control signal, it is each by controlling
Opening or closing for a isolating valve or feed pump, completes the water supply to steam generator secondary side.
According to the above method, the step S2 further include:
S25, when the controller runs excess load or when failure, starts redundant manipulator, passes through third photoelectric converter
The detection signal is received, and the third electric signal of the detection signal is converted to the second optical signal of detection signal；
S26, the second optical signal of the detection signal is transferred to the 4th photoelectric converter by the second optical fiber, and
Second optical signal of the detection signal is converted to the 4th electric signal of detection signal, hair by the 4th photoelectric converter
It send to the redundant manipulator.
According to the above method, the step S3 further include:
S35, the 4th electric signal for receiving and processing the detection signal；
S36, by Ethernet by the 4th electric signal transmission of treated the detection signal to terminal module；
S37, by the 4th electric signal of the terminal module detection signal that receives that treated, and generate control and refer to
It enables；
S38, the control instruction is transmitted to by the redundant manipulator by Ethernet.
According to the above method, the step S4 further include:
S44, the 4th electric signal that the detection signal is received and processed by the redundant manipulator；
S45, the third electric signal of the control signal is converted to the second of control signal by the 4th photoelectric converter
Optical signal；
S46, the second optical signal of the control signal is transferred to the third photoelectric converter by the second optical fiber, and
Second optical signal of the control signal is converted to the 4th electric signal of control signal, hair by the third photoelectric converter
It send to the DP bus network.
Technical solution provided in an embodiment of the present invention has the benefit that
By the comprehensive use site bussing technique of scene equipment level in water supply system, mounted on a network segment multiple
Field instrument and field device reduce the cable of connection and the usage amount of gantry, reduce the workload of installation and design；Together
When using redundancy field bus device, ensure that the safety of redundancy, and optimize network segment division；It is set by using smart fields
It is standby, precision, the anti-interference ability of detection signal are improved, is conducive to the accuracy and reliability of system, and mention for later maintenance
For convenience.
Detailed description of the invention
Fig. 1 is that a kind of structure for field bus system based on nuclear power station water supply system that the embodiment of the present invention one provides is shown
It is intended to.
Fig. 2 is that a kind of structure for field bus system based on nuclear power station water supply system that the embodiment of the present invention one provides is shown
It is intended to.
Fig. 3 is that a kind of field bus system based on nuclear power station water supply system that the embodiment of the present invention one provides preferably is implemented
The structural schematic diagram of example.
Fig. 4 is a kind of field bus system flow chart based on nuclear power station water supply system provided by Embodiment 2 of the present invention.
Fig. 5 is a kind of field bus system flow chart based on nuclear power station water supply system provided by Embodiment 2 of the present invention.
Specific embodiment
It is at high cost in order to which the control system wiring for solving nuclear power station water supply system is complicated, conventional field devices precision is low, after
Phase problem difficult in maintenance, the present invention is intended to provide a kind of method of the fieldbus based on nuclear power station water supply system, core
Thought is: proposing a kind of field bus system based on nuclear power station water supply system, passes through the scene equipment level in water supply system
Comprehensive use site bussing technique, reduces the cost of line；By using smart devices, the essence of detection signal is improved
Degree, anti-interference ability, provide convenience for later maintenance.
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is implemented below in conjunction with attached drawing
Mode is described in further detail.
Embodiment one
The embodiment of the invention provides a kind of field bus systems based on nuclear power station water supply system, referring to Fig. 1, the system
Include:
Fieldbus networks 20, field equipment connecting 10, for being transmitted by different transmission path from control system
40 control signal and reception from the detection signal of field device 10 to field device 10；
Photoelectric conversion device assembly 30 is separately connected fieldbus networks 20 and control system 40, for according to different transmission
Path control signal obtained or detection signal carry out the two times transfer of photosignal to control signal or detection signal,
Control signal after conversion is sent to fieldbus networks 20, or the detection signal after conversion is sent to control system 40.
Specifically, referring to fig. 2, fieldbus networks 20 are Profibus bus network, and Profibus bus network includes
DP bus network 201 and PA bus network 202, DP bus network 201 and PA bus network 202 form different transmission roads
Diameter；
Photoelectric conversion device assembly 30 includes being connected in different transmission path to be used for transmission detection signal and control
First photoelectric conversion device assembly of signal and for when 401 excess load of controller or failure in control system, transmission inspection
It surveys signal and controls the second photoelectric conversion device assembly of signal；
Field device 10 is used to acquire the water supply of the water supply system under unit starting, stand-by heat and shutdown operating condition
Parameter, and supply water to steam generator secondary side, maintain the water level of steam generator secondary side.
Specifically, referring to Fig. 3, the first photoelectric conversion device assembly 301 includes:
First photoelectric converter 3011 connects control system 40, for the electric signal for controlling signal to be converted to control letter
Number the first optical signal transmission to the second photoelectric converter 3012, the first optical signal for being also used to will test signal is converted to detection
Second electric signal transmission of signal is to control system 40；
Second photoelectric converter 3012, one end are separately connected DP bus network 201 and PA bus network 202, and the other end is logical
It crosses the first optical fiber 3013 and connects the first photoelectric converter 3011, the first optical signal for that will control signal is converted to control signal
The second electric signal transmission be also used to receive the detection signal of PA bus network 202 to DP bus network 201, and will test letter
Number the first electric signal be converted to detection signal the first optical signal transmission to the first photoelectric converter 3011；
Second photoelectric conversion device assembly 302 includes:
Third photoelectric converter 3021 is separately connected DP bus network 201 and PA bus network 202, total for receiving PA
The detection signal of gauze network 202, the third electric signal that will test signal are converted to the second optical signal transmission of detection signal to the
Four photoelectric converters 3022, the second optical signal for being also used to control signal are converted into the 4th electric signal transmission of control signal extremely
DP bus network 201；
4th photoelectric converter 3022 connects control system 40, and connects third photoelectric conversion by the second optical fiber 3023
Device 3021, the second optical signal for will test signal are converted to the 4th electric signal transmission to control system 40, are also used to control
The third electric signal of signal processed is converted to the second optical signal transmission of control signal to third photoelectric converter 3021.
In the present embodiment, have the communication main station of Profibus under control system 40, due under main website can carry much from
Station equipment (i.e. primary scene equipment 101 and secondary scene equipment 102), and main website with a distance from slave station farther out, to guarantee signal
Real-time and accuracy, therefore the control signal that main website issues is converted the electrical signal into light letter by photoelectric conversion device assembly 30
Number, reconvert is at electric signal after carrying out transmission at a distance by optical fiber；Or the detection signal that slave station issues is passed through into photoelectric conversion
Device assembly 30 converts the electrical signal to optical signal, and reconvert is at electric signal after carrying out transmission at a distance by optical fiber.
Specifically, referring to fig. 2, control system 40 includes:
Controller 401, the first photoelectric converter 3011 of connection are also used to for receiving and processing detection signal according to control
System instruction generates control signal；
Redundant manipulator 402 connects the 4th photoelectric converter 3022, is used for when 401 excess load of controller or failure,
Detection signal is received and processed, is also used to generate control signal according to control instruction；
In the present embodiment, the communication main station of the lower Profibus of control system 40 is redundancy, the main website while work of redundancy
Make, token passing can be achieved between main website, and its fastener is also redundancy, control and the pipe to slave station equipment are realized with this
The function of reason.
Terminal module 403 connects controller 401 and redundant manipulator 402 by Ethernet, for according to detection signal
Processing result generates control instruction；
Controller 401 is also used to when itself excess load or failure, starts redundant manipulator 402.
Specifically, referring to figs. 2 and 3, field device 10 includes primary scene equipment 101 and secondary scene equipment 103, the
One field device 101 includes for being separately connected at least one isolating valve 1013 of DP bus network 201 and at least one water supply
Pump 1014, secondary scene equipment 102 include at least one pressure gauge 1021 for being separately connected PA bus network 202 and extremely
A few flow instrument 1022, wherein
DP bus network 201 is for control signal to be sent to corresponding isolating valve 1013 after converting or feed pump 1014 is held
The different movements of row, supply water to steam generator secondary side；
In the present embodiment, DP bus network 201 can mainly connect the intelligence such as executing agency, motor for hanging intelligence and set
Standby, part of smart machine also supports the DP bus network of redundancy, can largely improve the reliability and peace of network
Quan Xing；To guarantee the real-time and accuracy that communicate, the primary scene equipment mounted on each network segment in DP bus network 201
101 quantity are no more than 16.
PA bus network 202 passes through the first photoelectric conversion device assembly 301 or the second photoelectric converter for will test signal
Component 302 transfers to control system 40 after carrying out secondary photoelectric conversion；
In the present embodiment, Profibus-DP network is converted by DP/PA protocol conversion inside PA bus network 202
The connection of Profibus-PA equipment is carried out for Profibus-PA network.
Specifically, referring to Fig. 3, DP bus network 201 includes two tunnel transmission end: main transmission end 1011 and redundant transmission end
1012, wherein being correspondingly arranged on terminal resistance per the end of transmission end all the way, each terminal resistance is anti-for reducing signal
It penetrates；
In the present embodiment, signal circuit has about 220 Ω of its characteristic impedance due to various transmission lines, when signal exists
When being transmitted to terminal in transmission line, if its terminal impedance and characteristic impedance difference, will cause reflection, to make signal waveform
Distortion；The phenomenon that distortion, is not obvious in short-term in transmission line, but can be more serious with the lengthening of transmission line, cause signal without
Method is correctly transmitted, it is therefore necessary to be installed terminal resistance additional to reduce signal reflex, be ensured communication quality；Meanwhile terminal resistance may be used also
To ensure that the voltage when no data are transmitted, in bus is the zero-signal voltage that transceiver is approved.
Specifically, referring to Fig. 3, PA junction box 203 is additionally provided between PA bus network 202 and secondary scene equipment 102,
PA junction box 203 is used to for PA signal being split as multiple PA signals, and has short-circuit protection and overload protection.
In the present embodiment, the equipment for hanging intelligence instrument class is mainly connect in PA bus network 202, passes through PA junction box 203
Single PA signal is split as more PA signals, included short-circuit protection and overload protection are guaranteeing that system securely and reliably
Under the premise of reduce cable cost to the maximum extent；It is each in PA bus network 202 for the real-time and accuracy for guaranteeing communication
102 quantity of secondary scene equipment mounted on network segment no more than 6, and the valve quantity mounted on same network segment no more than
2；
The total quantity mounted in DP bus network 201 and PA bus network 202 is no more than 18.
Specifically, all contain two-way receiving end referring to Fig. 3, isolating valve 1013 and feed pump 1014, be separately connected main transmission
End 1011 and redundant transmission end 1012 are passed for when main transmission end 1011 operates normally, receiving and executing main transmission end 1011
Control signal after defeated conversion；In main 1011 operation troubles of transmission end, receives and execute the transmission of redundant transmission end 1012
Control signal after conversion；
Pressure gauge 1021 and flow instrument 1022 are connected to the single PA signal after the fractionation of PA junction box 203, use
In the water supply parameter of acquisition water supply system, detection signal is generated.In the present embodiment, when controlling water supply system, will be
The equipment such as feed pump 1014 and valve (1013 and 1015) in system are linked into DP bus network 201, and live intelligence instrument connects
Enter to PA bus network 202, the equipment such as feed pump 1014 and valve (1013 and 1015) selection support redundancy Profibus-DP's
Equipment, there are two the slave stations of Profibus-DP communication interface for redundancy Profibus-DP equipment belt, and have between two interfaces
There are special redundant communication paths to realize the two information exchange；It is one of to be used as master-salve station communication interface when work, another
As spare slave station communication interface；Redundancy slave station also has there are two independent Profibus-DP protocol communication stack, corresponds to two
Profibus-DP bus interface.Redundant channel is specifically used to the letter of the configuration between two protocol stacks of redundancy slave station inner exchanging
Breath, bus parameter information and input/output procedure data, are completed at the same time the switching of the primary, spare communication interface of redundancy slave station；
Redundance unit in system, such as part instrument, main feed pump or starting feed pump equipment are respectively connected to difference
Network segment on, prevent the failure of a network segment from influencing whether the function of whole system.
Specifically, referring to Fig. 3, the field bus system is divided into the first level, the second level and third level three-layered node
Structure, wherein
First level is field control level, including the primary scene equipment and secondary scene equipment, is used for the detection
The execution of the acquisition of signal and the control signal；
Second level is process control level, including the controller and redundant manipulator, to detection signal
Reason；
Third level is operation controlled stage, including the terminal module and relevant data processing equipment, for according to inspection
The processing result for surveying signal generates control signal.The present embodiment passes through the comprehensive use site of scene equipment level in water supply system
Bussing technique mounts multiple field instruments and field device on a network segment, reduces the use of the cable and gantry of connection
Amount, reduces the workload of installation and design；The field bus device for using redundancy simultaneously, ensure that the safety of redundancy, and
Optimize network segment to divide；By using smart devices, precision, the anti-interference ability of detection signal are improved, system is conducive to
Accuracy and reliability, and provide convenience for later maintenance.
Embodiment two
The embodiment of the invention also provides a kind of method of fieldbus based on nuclear power station water supply system, it is suitable for implementing
Field bus system based on nuclear power station water supply system shown in example one, referring to fig. 4, this method comprises:
S1, in unit starting, stand-by heat and under shutting down operating condition, the water supply system is acquired by field device 10
Water supply parameter generates detection signal, is transferred to fieldbus networks 20；
S2, detection signal is received, after the two times transfer by the progress photosignal of photoelectric conversion device assembly 30, after conversion
Detection signal be sent to control system 40；
S3, detection signal is received and processed, control signal is sent according to processing result；
S4, control signal is received, the two times transfer of photosignal is carried out by photoelectric conversion device assembly 30, after conversion
Control signal is sent to fieldbus networks 20；
S5, field device 10 is received and sends a control signal to, control field device 10 is supplied to steam generator secondary side
Water maintains the water level of steam generator secondary side.
In the present embodiment, nuclear power station water supply system is predominantly located in the steam turbine workshop of nuclear power plant, is divided into main to water system
System and starting water supply system；Wherein, it is known as starting water supply by starting the watering path of feed water flow regulating valve；Pass through main water supply
The watering path of flow control valve is known as main water supply.
When power plant operates normally, main feed pump (feed pump 1014) is operated normally, by main watering path to steam generation
Device supplies water；In operational process, pass through the equal instrument measurements master of the pressure gauge 1021 and flow instrument 1022 of secondary scene equipment 102
The main water supply parameter such as feedwater flow, steam generator wide-range/narrow range liquid level, feed temperature, steam flow and steam pressure,
It is converted into detection signal, control system 40 is transmitted to by PA bus network 202 and photoelectric conversion device assembly 30；Then by controlling
Control signal is transmitted to the master of primary scene equipment 101 by photoelectric conversion device assembly 30 and DP bus network 201 by system 40
Feed-regulating valve (isolating valve 1013) controls main feed-regulating valve (isolating valve 1013) and adjusts main feedwater flow, makes steam generation
Device liquid level maintains in a certain range.
When flow instrument 1022 detects main feedwater flow lower than a preset value, control system 40 issues control signal,
Close main feed-regulating valve (isolating valve 1013), open starting feed-regulating valve (isolating valve 1015), from starting water supply system to
Steam generator supplies water.
Specifically, include: referring to Fig. 5, step S2
S21, detection signal is received by PA bus network 202；
S22, judge whether the operation of controller 401 is normal；
S23, when controller 401 operates normally, detection signal is received by the second photoelectric converter 3012, and will test
First electric signal of signal is converted to the first optical signal of detection signal；
S24, the first optical signal that will test signal are transferred to the first photoelectric converter 3011 by the first optical fiber 3013, and
The second electric signal that detection signal is converted to by the first optical signal that the first photoelectric converter 3011 will test signal, is sent to
Controller 401；
In the present embodiment, have the communication main station of Profibus under control system 40, due under main website can carry much from
Station equipment, and main website with a distance from slave station farther out, for guarantee signal real-time and accuracy, therefore by main website issue control believe
Number optical signal is converted the electrical signal to by photoelectric conversion device assembly 30, reconvert is carried out after transmitting at a distance into electricity by optical fiber
Signal.
Specifically, include: referring to Fig. 5, step S3
S31, the second electric signal for receiving and processing detection signal；
S32, by Ethernet by the second electric signal transmission of treated detection signal to terminal module 403；
In the present embodiment, the communication main station of the lower Profibus of controller 401 completes the number with slave station in bus network 20
According to exchange, and it will test signal and be mapped in DCS by controller 41, play the role of protocol conversion, be transmitted to the detection letter of DCS
Number terminal module 403 is uploaded to by Ethernet；
S33, by the second electric signal of the detection signal that receives that treated of terminal module 403, and generate control instruction；
S34, control instruction is transmitted to by controller 401 by Ethernet.
Specifically, include: referring to Fig. 5, step S4
S41, control instruction is received by controller 401 and generates control signal；
S42, the first electric signal for controlling signal is converted to the first of control signal by the first photoelectric converter 3011
Optical signal；
S43, the first optical signal for controlling signal is transferred to the second photoelectric converter 3012 by the first optical fiber 3013, and
The second electric signal that the first optical signal for controlling signal is converted to control signal by the second photoelectric converter 3012, is sent to
DP bus network 201.
In the present embodiment, the communication main station under control system 40 apart from slave station farther out, therefore by slave station issue detection believe
Number optical signal is converted the electrical signal to by photoelectric conversion device assembly 30, reconvert is carried out after transmitting at a distance into electricity by optical fiber
Signal.
Specifically, include: referring to Fig. 5, step S5
S51, the control signal after conversion is received；
S52, judge whether main transmission end operation is normal；
If S53, main transmission end operate normally, the control signal after conversion is transmitted to first by main transmission end 1011 and is showed
Field device 101；
If S54, main transmission end operation troubles, the control signal after conversion is transmitted to first by redundant transmission end 1012
Field device 101；
Unlatching when isolating valve 1013 or feed pump 1014 in S55, primary scene equipment 101 receive control signal, leads to
It crosses and controls opening or closing for each isolating valve 1013 or feed pump 1014, complete the water supply to steam generator secondary side；Tool
Body, referring to Fig. 5, step S2 further include:
S25, when controller 401 runs excess load or when failure, starts redundant manipulator 402, passes through third photoelectric conversion
Device 3021 receives detection signal, and the third electric signal that will test signal is converted to the second optical signal of detection signal；
S26, the second optical signal that will test signal are transferred to the 4th photoelectric converter 3022 by the second optical fiber 3023, and
The 4th electric signal that detection signal is converted to by the second optical signal that the 4th photoelectric converter 3022 will test signal, is sent to
Redundant manipulator 402.
Specifically, referring to Fig. 5, step S3 further include:
S35, the 4th electric signal for receiving and processing detection signal；
S36, by Ethernet by the 4th electric signal transmission of treated detection signal to terminal module 403；
S37, by the 4th electric signal of the detection signal that receives that treated of terminal module 403, and generate control instruction；
S38, control instruction is transmitted to by redundant manipulator 402 by Ethernet.
Specifically, referring to Fig. 5, step S4 further include:
S44, the 4th electric signal that detection signal is received and processed by redundant manipulator 402；
S45, the third electric signal for controlling signal is converted to the second of control signal by the 4th photoelectric converter 3022
Optical signal；
S46, the second optical signal for controlling signal is transferred to third photoelectric converter 3021 by the second optical fiber 3023, and
The 4th electric signal that the second optical signal for controlling signal is converted to control signal by third photoelectric converter 3021, is sent to
DP bus network 201.
The present embodiment is by the comprehensive use site bussing technique of scene equipment level in water supply system, on a network segment
Multiple field instruments and field device are mounted, the cable of connection and the usage amount of gantry are reduced, reduces installation and design
Workload；The field bus device for using redundancy simultaneously, ensure that the safety of redundancy, and optimize network segment division；By using
Smart devices improve precision, the anti-interference ability of detection signal, are conducive to the accuracy and reliability of system, and be
Later maintenance provides convenience.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
It should be understood that the field bus system based on nuclear power station water supply system that above formula embodiment provides is realizing base
It is only the example of the division of the above functional modules, practical when the method for the fieldbus of nuclear power station water supply system
In, it can according to need and be completed by different functional modules above-mentioned function distribution, i.e., draw the internal structure of equipment
It is divided into different functional modules, to complete all or part of the functions described above.In addition, provided by the above embodiment be based on
The embodiment of the method for the field bus system of nuclear power station water supply system and the fieldbus based on nuclear power station water supply system belongs to together
One design, specific implementation process are detailed in embodiment of the method, and which is not described herein again.
Those of ordinary skill in the art will appreciate that realizing all or part of the steps of above-described embodiment, hardware can be passed through
It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (17)
1. a kind of field bus system based on nuclear power station water supply system is used for nuclear power station water supply system field device and nuclear power station
The communication connection of control system, comprising:
Fieldbus networks, field equipment connecting, for being transmitted from control system by different transmission path to described existing
Field device controls signal and reception from the detection signal of field device；
Photoelectric conversion device assembly is separately connected the fieldbus networks and control system, for according to different transmission path institute
The control signal or detection signal of acquisition, the two times transfer of photosignal is carried out to control signal or detection signal, will be converted
Control signal afterwards is sent to the fieldbus networks, or the detection signal after conversion is sent to the control system；
The photoelectric conversion device assembly includes being connected in different transmission path to be used for transmission the detection signal and control
First photoelectric conversion device assembly of signal processed and for when the controller excess load or failure in control system, described in transmission
It detects signal and controls the second photoelectric conversion device assembly of signal；
The field device is used to acquire the water supply ginseng of the water supply system under unit starting, stand-by heat and shutdown operating condition
Number, and supply water to steam generator secondary side, maintain the water level of steam generator secondary side.
2. system according to claim 1, which is characterized in that the fieldbus networks are Profibus bus network,
The Profibus bus network includes DP bus network and PA bus network.
3. system according to claim 2, which is characterized in that the first photoelectric conversion device assembly includes:
First photoelectric converter connects the control system, for the first electric signal of the control signal to be converted to control
For first optical signal transmission of signal to the second photoelectric converter, the first optical signal for being also used to will test signal is converted to detection letter
Number the second electric signal transmission to the control system；
Second photoelectric converter, one end are separately connected the DP bus network and PA bus network, and the other end passes through the first optical fiber
First photoelectric converter is connected, for the first optical signal of the control signal to be converted to the second telecommunications of control signal
Number it is transmitted to the DP bus network, is also used to receive the detection signal of the PA bus network, and by the detection signal
First electric signal is converted to the first optical signal transmission of detection signal to first photoelectric converter；
The second photoelectric conversion device assembly includes:
Third photoelectric converter is separately connected the DP bus network and PA bus network, for receiving the PA bus network
Detection signal, by it is described detection signal third electric signal be converted to detection signal the second optical signal transmission to the 4th photoelectricity
Converter is also used to the second optical signal of the control signal being converted into the 4th electric signal transmission of control signal to DP bus
Network；
4th photoelectric converter connects the control system, and connects the third photoelectric converter by the second optical fiber, is used for
Second optical signal of the detection signal is converted into the 4th electric signal transmission to the control system, is also used to the control
The third electric signal of signal is converted to the second optical signal transmission of control signal to the third photoelectric converter.
4. system according to claim 3, which is characterized in that the control system includes:
Controller connects first photoelectric converter and is also used to be referred to according to control for receiving and processing the detection signal
It enables and generates the control signal；
Redundant manipulator connects the 4th photoelectric converter, for receiving simultaneously when the controller excess load or failure
The detection signal is handled, is also used to generate the control signal according to control instruction；
Terminal module connects the controller and redundant manipulator by Ethernet, for the processing according to the detection signal
As a result control instruction is generated；
The controller is also used to when itself excess load or failure, starts redundant manipulator.
5. system according to claim 2, which is characterized in that the field device includes that primary scene equipment and second are existing
Field device, the primary scene equipment include at least one isolating valve and at least one for being separately connected the DP bus network
A feed pump, the secondary scene equipment include at least one pressure gauge and at least one for being separately connected PA bus network
A flow instrument, wherein
The DP bus network is used to the control signal after conversion being sent to the corresponding separate pump or feed pump executes not
With movement, supply water to steam generator secondary side；
The PA bus network passes through the first photoelectric conversion device assembly or the second photoelectric converter group for will test signal
Part transfers to the control system after carrying out secondary photoelectric conversion.
6. system according to claim 5, which is characterized in that the DP bus network includes two tunnel transmission end: main transmission
End and redundant transmission end, wherein being correspondingly arranged on terminal resistance per the end of transmission end all the way, each terminal resistance is used for
Reduce signal reflex.
7. system according to claim 6, which is characterized in that also set between the PA bus network and secondary scene equipment
It is equipped with PA junction box, the PA junction box is used to for PA signal being split as multiple PA signals, and there is short-circuit protection and overload to protect
Shield.
8. system according to claim 7, which is characterized in that each isolating valve and feed pump all contain two-way reception
End, is separately connected the main transmission end and redundant transmission end, for receiving and executing institute when the main transmission end operates normally
Control signal after stating the conversion of main transmission end transmission；In the main transmission end operation troubles, receives and execute described
Control signal after the conversion of redundant transmission end transmission；Each pressure gauge and flow instrument are connected to through institute
Single PA signal after PA junction box is split is stated, for acquiring the water supply parameter of the water supply system, generates detection signal.
9. system according to claim 4, which is characterized in that the field bus system is divided into the first level, the second layer
Grade and third level three-decker, the field device includes primary scene equipment and secondary scene equipment, wherein
First level is field control level, including the primary scene equipment and secondary scene equipment, is used for the detection signal
Acquisition and it is described control signal execution；
Second level is process control level, including the controller and redundant manipulator, for handling detection signal；
Third level is operation controlled stage, including the terminal module and relevant data processing equipment, for being believed according to detection
Number processing result generate control signal.
10. a kind of method of the fieldbus based on nuclear power station water supply system, spy are, which comprises
S1, in unit starting, stand-by heat and under shutting down operating condition, joined by the water supply that field device acquires the water supply system
Number generates detection signal, is transferred to fieldbus networks；
S2, the detection signal is received, after the two times transfer that photosignal is carried out by photoelectric conversion device assembly, after conversion
Detection signal is sent to control system；
S3, the detection signal is received and processed, control signal is sent according to processing result；
S4, the control signal is received, the two times transfer of photosignal is carried out by the photoelectric conversion device assembly, after conversion
Control signal be sent to the fieldbus networks；
S5, reception simultaneously send the control signal to the field device, and it is secondary to steam generator to control the field device
Side is supplied water, and the water level of steam generator secondary side is maintained.
11. according to the method described in claim 10, it is characterized in that, the step S2 includes:
S21, the detection signal is received by PA bus network；
S22, judge whether controller operation is normal；S23, when the controller operate normally when, pass through the second photoelectric converter
The detection signal is received, and the first electric signal of the detection signal is converted to the first optical signal of detection signal；
S24, the first optical signal of the detection signal is transferred to first photoelectric converter by the first optical fiber, and passed through
First optical signal of the detection signal is converted to the second electric signal of detection signal by first photoelectric converter, is sent to
The controller.
12. according to the method described in claim 10, it is characterized in that, the step S3 includes:
S31, the second electric signal for receiving and processing the detection signal；
S32, by Ethernet by the second electric signal transmission of treated the detection signal to terminal module；
S33, by the second electric signal of the terminal module detection signal that receives that treated, and generate control instruction；
S34, the control instruction is transmitted to by the controller by Ethernet.
13. according to the method described in claim 10, it is characterized in that, the step S4 includes:
S41, the control instruction is received by the controller and generates control signal；
S42, the first light that the first electric signal of the control signal is converted to control signal is believed by the first photoelectric converter
Number；
S43, the first optical signal of the control signal is transferred to the second photoelectric converter by the first optical fiber, and by described
First optical signal of the control signal is converted to the second electric signal of control signal by the second photoelectric converter, and it is total to be sent to DP
Gauze network.
14. according to the method described in claim 10, it is characterized in that, the step S5 includes:
S51, the control signal after the conversion is received；
S52, judge whether main transmission end operation is normal；
If S53, main transmission end operate normally, the control signal after conversion is transmitted to primary scene by main transmission end and is set
It is standby；
If S54, main transmission end operation troubles, the control signal after conversion is transmitted to primary scene by redundant transmission end
Equipment；
Unlatching when S55, the isolating valve in primary scene equipment or feed pump receive the control signal, by control it is each every
From opening or closing for valve or feed pump, the water supply to steam generator secondary side is completed.
15. according to the method for claim 11, which is characterized in that the step S2 further include:
S25, when the controller runs excess load or when failure, starts redundant manipulator, is received by third photoelectric converter
The detection signal, and the third electric signal of the detection signal is converted to the second optical signal for detecting signal；
S26, the second optical signal of the detection signal is transferred to the 4th photoelectric converter by the second optical fiber, and by described
Second optical signal of the detection signal is converted to the 4th electric signal of detection signal by the 4th photoelectric converter, is sent to described
Redundant manipulator.
16. according to the method for claim 12, which is characterized in that the step S3 further include:
S35, the 4th electric signal for receiving and processing the detection signal；
S36, by Ethernet by the 4th electric signal transmission of treated the detection signal to terminal module；
S37, by the 4th electric signal of the terminal module detection signal that receives that treated, and generate control instruction；
S38, the control instruction is transmitted to by redundant manipulator by Ethernet.
17. according to the method for claim 13, which is characterized in that the step S4 further include:
S44, the 4th electric signal that the detection signal is received and processed by redundant manipulator；
S45, the second light that the third electric signal of the control signal is converted to control signal is believed by the 4th photoelectric converter
Number；
S46, the second optical signal of the control signal is transferred to third photoelectric converter by the second optical fiber, and by described
Second optical signal of the control signal is converted to the 4th electric signal of control signal by third photoelectric converter, is sent to described
DP bus network.
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| CN107885172A (en) * | 2017-10-31 | 2018-04-06 | 中广核工程有限公司 | A kind of monitoring system and method for nuclear power station joint pump house |
| CN109581923B (en) * | 2018-12-05 | 2021-10-15 | 深圳中广核工程设计有限公司 | Water supply control system for nuclear power station |
| CN113433978A (en) * | 2021-07-01 | 2021-09-24 | 华能国际电力股份有限公司上安电厂 | Unit water supply control system optimization method |
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