CN110069036A - Safe distant control function design method in a kind of comprehensive monitoring system - Google Patents
Safe distant control function design method in a kind of comprehensive monitoring system Download PDFInfo
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- CN110069036A CN110069036A CN201910429219.6A CN201910429219A CN110069036A CN 110069036 A CN110069036 A CN 110069036A CN 201910429219 A CN201910429219 A CN 201910429219A CN 110069036 A CN110069036 A CN 110069036A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/048—Monitoring; Safety
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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)
- Automation & Control Theory (AREA)
- Safety Devices In Control Systems (AREA)
Abstract
The invention discloses distant control function design methods safe in a kind of comprehensive monitoring system, the basic unit of the platform data tissue of SCADA monitoring system is object, relationship in system between all data and data is with object or the formal distribution of object properties in various object types, each object type is numbered by a unique ObjectId, it is characterized in that: the remote control equipment modeling procedure based on object-oriented, corresponding remote control dialog box HMI is designed for every kind of remote control equipment, for operating with dispatcher；Lack of competence illegal operation is avoided, all operation buttons carry out permission judgement in dialog box, and the operation button in dialog box that the user of no operating right opens is Disabled inoperable state；Step 2: remote control security design procedure avoids the abnormal caused operational order disorder bring mistake such as CPU, memory randomness mistake, communication link mistake during remote control operation.
Description
Technical field
The present invention relates to each professional skill fields applied by comprehensively monitoring ISCS, SCADA distributed platform, cover comprehensive
Close monitoring, power monitoring, environment and equipment monitoring system, water conservancy monitoring, oil gas chemical industry, rail traffic, coal mine etc. automatically
Chemical industry controls industry.
It is with the present computer technology, network technology, automatic technology and letter that track traffic synthetic, which monitors (ISCS) system,
Mainframe computer integrated system based on breath technology.The multiple Automation Specialty subsystems of the system integration, and integrated flat
Platform carries out unified monitoring to each profession under supporting, realizes the linkage control function between the information sharing and system of each professional system
Can, efficiency of operation is improved, provides basis for IT application to realize that urban track traffic modernizes operation management.
Background technique
The major function of comprehensive monitoring system includes assisting between the real-time Centralized Monitoring function of electromechanical equipment and each system
Adjust linkage function two large divisions.On the one hand, it can realize to power equipment, fire alarm information and its set by comprehensive monitoring system
Standby, station ring control equipment, section ring control equipment, environmental parameter, shielding door equipment, flood door equipment, Escalator equipment, illumination are set
Standby, access control equipment, automatic ticket inspection equipment, broadcast and closed circuit television equipment, Customer information display system broadcast information and when
The basic function of the carry out such as clock information real-time centralized watch and control；On the other hand, it by comprehensive monitoring system, can also be achieved late
Between under non-traffic-operating period, in the daytime in the case of normal operation, under urgent emergency case and each phase relation under important equipment fault condition
The Premium Features such as coordination and interaction between equipment of uniting.
Urban track traffic is once destroyed, and public interest can be seriously endangered, and belongs to the model of key message infrastructure
It encloses.Core of the urban track traffic comprehensive monitoring system as urban track traffics such as large- and-medium size cities subway, light rail, tramcars
Heart main body, safety problem more can not be ignored." the city the GB-T 50636-2018 rail formally implemented on September 1st, 2018
Road traffic comprehensive monitoring system engineering standard " in explicitly point out that " information security of comprehensive monitoring system should meet existing state
Family standard " the safe part 1 of industrial control information system: evaluating regulation " GB/T30976.1 and " industrial control information system peace
Full part 2: acceptance specification " GB/T30976.2 regulation, and preferably press the information system security class protective standard third level progress
Design is implemented and is checked and accepted ".And at present the actual situation is that the producer of domestic each comprehensive monitoring system all with it is higher require into
Row design and transformation comprehensive monitoring system, can meet more professional safety certification, typical such as SIL (Safety
Integrity Level- safety integrity level) certification of 2 level securities.
SIL certification is to be based on IEC 61508 (GB/T 20438), IEC 61511 (GB/T 21109), IEC 61513,
IEC 13849-1, IEC 62061, IEC 61800-5-2 etc. standards, safety integrity level (SIL) to safety equipment or
A kind of third party assessment, verifying and the certification that performance rate (PL) is assessed and confirmed.
The most frequently used, most critical in urban track traffic automatic system for monitoring is also to the highest function of security requirement
One of be exactly equipment remote control operation, due to during entire remote control operation may exist remote control maloperation, permission erroneous judgement
It is remotely controlled mistake caused by the reasons such as disconnected, system processing remote-control data mistake, communication fault, data transmission fault, if lacked
Weary effective Security Assurance Mechanism, it is more likely that the remote control for causing mistake, so that the operation to city rail traffic route causes
Certain harm.
The comprehensive monitoring system of applicant carries out the development approach of security software during carrying out SIL2 level authentication
Special training, and learnt the mentality of designing of the domestic interlocking of signals system for meeting SIL4 grade in part, it is supervised in conjunction with comprehensive
The characteristic of control system, devises a kind of scheme of safety remote control equipment, and the program can be avoided effectively due to comprehensively monitoring system
The abnormal bring safety issue such as CPU, memory randomness mistake, communication link mistake occurs for system.
Summary of the invention
Aiming at the problems existing in the prior art, distant control function safe in a kind of comprehensive monitoring system of the invention design
Method can effectively avoid that such as CPU, memory randomness mistake, communication link mistake occurs due to comprehensive monitoring system
Deng abnormal bring safety issue.
In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention are as follows: safe in a kind of comprehensive monitoring system
Distant control function design method, the basic unit of the platform data tissue of SCADA monitoring system are objects, all data in system
And the relationship between data is with object or the formal distribution of object properties in various object types, each object type
It is numbered by a unique ObjectId, it is characterised in that:
Step 1: the remote control equipment modeling procedure based on object-oriented, is the corresponding remote control pair of every kind of remote control equipment design
Frame HMI is talked about, for operating with dispatcher；
Lack of competence illegal operation is avoided, all operation buttons carry out permission judgement, the use of no operating right in dialog box
The operation button in dialog box that family is opened is Disabled inoperable state；
Each equipment only allows operator's opening to operate, by judging that the Lock in breaker data model belongs to
Property, the remote control dialog box for only allowing operator's one equipment of opening interior at any time, i.e., after an operator opens, separately
One operator cannot open the remote control dialog box of the equipment again；
Safety operation logic judgment in interface determines whether certain operation according to all remote signalling states of current device.
Step 2: remote control security design procedure avoids CPU, memory randomness mistake, leads to during remote control operation
Believe the abnormal caused operational order disorder bring mistake such as link transmission mistake；
Addition is used for the specific properties of safety verification on 2 remotely-controlled object point data model of table:
To be originally used for 0,1 Command remote control select command split, be indicated using two compound commands,
The two attributes of CommandSafetyVal1, CommandSafetyVal2 are also write while writing Command attribute；Command
The 0 corresponding CommandSafetyVal1 that writes is 0x5aa5, and CommandSafetyVal2 is 0xa55a；The correspondence of Command 1 is write
CommandSafetyVal1 is 0xa55a, and CommandSafetyVal2 is 0x5aa5；
The write-in of CommandTime remote control selection time is not determining when the write-in of Command attribute, but
After Command, CommandSafetyVal1, CommandSafetyVal2 attribute of write-in platform data model again by dialog box
Secondary these three attributes for reading current device, and judge (Command==0&&CommandSafetyVal1==0x5aa5&&
) or (Command==1&&CommandSafetyVal1==0xa55a&& CommandSafetyVal2==0xa55a
CommandSafetyVal2==0x5aa5 the CommandTime remote control selection time) is written when being true again, and will remote control selection
Attribute CommandTimeMD5 is written in the md5 encryption character string of time character string.ExecuteTime attribute is pressed in click " execution "
It is written when button, and attribute ExecuteTimeMD5 is written into the md5 encryption character string that remote control executes time character string simultaneously, it is this
Mechanism can effectively avoid all exceptions that data are written from the interface HMI to system platform device model；
Remote control selection data content, remote control are executed into data using the extension ASDU of Standards Code in data transmission protocol
Content transmission is to PSCADA appliance arrangement.
Beneficial effects of the present invention
Urban track traffic is to be related to the significant problem of the people's livelihood, in City Rail Transit System the safe operation of equipment with
The safety of the public is closely coupled.The application design safety remote control function can be avoided in equipment remote-control operating process due to
Caused by being remotely controlled the reasons such as maloperation, permission erroneous judgement, system processes data mistake, communication fault, data transmission fault
Mistake, it is ensured that remote control security validity reduces accident to guarantee that comprehensive monitoring system is correctly stable, effective operation.
Specific embodiment
Below in conjunction with specific embodiment, invention is further described in detail.
Since the device category for needing to be remotely controlled operation in comprehensive monitoring system is various, the application is in the introduction for side
Just data modeling and explanation are carried out, is illustrated with the breaker apparatus in comprehensive monitoring system in power monitoring subsystem.
Safe distant control function design method, SCADA monitoring system in a kind of comprehensive monitoring system of applicant
The basic unit of UNICON1.0 platform data tissue is object, the relationship in system between all data and data with
In the example of various object types, each object instance is unique by one for object or the formal distribution of object properties
ObjectId is numbered.Plateform system is aided with graphical tools, and data are showed in the form of meeting real topology
User, such mode substantially increase the data managing capacity of large-scale SCADA system.
(1) the remote control equipment modeling of object-oriented
Better support can be provided for the remote control interface HMI, remote control operation by designing good data modeling mode.Our company is comprehensive
The basic unit for closing monitoring system platform data organization is object, and remote control equipment is carried out Object -Oriented Model, sets remote control
Standby data organization is more rationally conducive to the safety Design of entire distant control function.The data model of breaker apparatus such as following table
It is shown.
1 breaker data model of table
2 remotely-controlled object point data model of table
(2) safety remote control dialog box HMI is designed
Remote control equipment modeling pattern based on object-oriented can design corresponding remote control dialog box for every kind of remote control equipment
HMI, for being operated with dispatcher.
Safe design 1: lack of competence illegal operation is avoided.All operation buttons carry out permission judgement, no behaviour in dialog box
The operation button made in the dialog box of user's opening of permission is Disabled inoperable state (gray display).
Safe design 2: each equipment only allows operator's opening to operate.By judging breaker data model
In Lock attribute, at any time in only allow operator to open the remote control dialog box of an equipment, i.e., one operation
After member opens, another operator cannot open the remote control dialog box of the equipment again.
Safe design 3: interface safety operation logic judgment.It is determined whether according to all remote signalling states of current device
Certain operation (action type: separating brake, combined floodgate, execution, cancellation), specific judgement are as follows.
3 equipment operation logic judgment of table
(3) meet the remote control security design of SIL2
In order to meet the safe design demand in SIL2, during safe design deficiency in upper section is to avoid remote control operation
The abnormal caused operational order disorder bring mistake of such as CPU, memory randomness mistake, communication link mistake, it is typical
" separating brake " button is clicked after meeting all conditions such as operator, it should send " separating brake selection " order that bid value is 0, and
And this orders device data model from HMI interface to system platform, then is transferred in breaker apparatus and all should be always
0.Obviously mistake below may occur in the process, so as to cause operating mistake.
1. being written to the data in system platform data model from 0 displacement 1 from the interface HMI；
2.CPU handles mistake, and 0 is handled as other data；
3., wrong (or write-in due to memory invalid data) occurs for memory of this order of storage 0 in memory, this
Value is changed to non-zero value；
4. 0 becomes non-zero value during link transmission.
Obviously, above-mentioned reason has all lacked the verification to order data.Such issues that in order to solve, it is special also to need to carry out
Safe design.
Safe design 4: the following four special categories for safety verification are added on " 2 remotely-controlled object point data model of table "
Property.
Safe design 4.1: the Command remote control select command for being originally used for 0,1 is split and (while retaining Command
Attribute), be indicated using two compound commands, also write while writing Command attribute CommandSafetyVal1,
The two attributes of CommandSafetyVal2.The corresponding CommandSafetyVal1 that writes of Command 0 is 0x5aa5, and
CommandSafetyVal2 is 0xa55a；The corresponding CommandSafetyVal1 that writes of Command 1 is 0xa55a, and
CommandSafetyVal2 is 0x5aa5.
The use of this pair of special magic number of 0x5aa5 and 0xa55a is primarily to avoid may cause because of exception
Common mode failure.The binary number of 0x5aa5 and 0xa55a is respectively 0,101 1,010 1,010 0101 and 1,010 0,101 0101
1010.Notice distance of the inside of 0x5aa5 number on 1bits, 4bits, 8bits reach it is maximum (every 1, it is 4 every,
Every 8 data are completely opposite)；Distance of the inside of 0x5aa5 or 0xa55a number on 1bits, 4bits, 8bits reaches
To maximum (every 1,4 every, every 8 data are completely opposite)；And the value of 0x5aa5 and 0xa55a step-by-step exclusive or is
0xFFFF, i.e. the distance between they are also maximum.The design of this group of data can effectively avoid due to data CPU, memory,
Data bit entanglement caused by the reasons such as potential anomalies occurs when storing in hard disk.
4 remotely-controlled object point of table (increasing security attribute) data model
The write-in of safe design 4.2:CommandTime remote control selection time is not when Command attribute is written
It waits and determines, but belong in Command, CommandSafetyVal1, CommandSafetyVal2 of write-in platform data model
These three attributes of current device are read again by dialog box after property, and judge (Command==0&&
) or (Command==1&& CommandSafetyVal1==0x5aa5&&CommandSafetyVal2==0xa55a
CommandSafetyVal1==0xa55a&&CommandSafetyVal2==0x5aa5 it) is written when being true again
The CommandTime remote control selection time, and attribute is written into the md5 encryption character string of remote control selection time character string
CommandTimeMD5.ExecuteTime attribute is written in click " execution " button, and remote control is executed time character simultaneously
Attribute ExecuteTimeMD5 is written in the md5 encryption character string of string, and this mechanism can effectively avoid putting down from HMI interface to system
All exceptions of platform device model write-in data.
Safe design 4.3: remote control is selected using the extension ASDU of Standards Code in data transmission protocol, executes data
It is transmitted to PSCADA appliance arrangement.This mechanism can effectively avoid from system platform device model to PSCADA appliance arrangement it
Between all data transmission exceptions.
Remote control selection data content: select command Command, selection time CommandTime, safety selection attribute data
CommandSafetyVal1,CommandSafetyVal2,CommandTimeMD5.PSCADA appliance arrangement is receiving remote control
It is verified after selection data: as (Command==0&&CommandSafetyVal1==0x5aa5&&
CommandSafetyVal2==0xa55a) && (CommandTimeMD5==MD5 (CommandTime)) expression formula is true
When separating brake select command it is effective；As (Command==1&&CommandSafetyVal1==0xa55a&&
CommandSafetyVal2==0x5aa5) && (CommandTimeMD5==MD5 (CommandTime)) expression formula is true
When combined floodgate select command it is effective.
Remote control executes data content: select command Command, selection time CommandTime, executing data
ExecuteTrigger, execute time ExecuteTime, safety selection attribute data CommandSafetyVal1,
CommandSafetyVal2, CommandTimeMD5, safety execute attribute data ExecuteTimeMD5.PSCADA device is set
It is standby to be verified after receiving remote control and executing data: as (Command==0&&CommandSafetyVal1==
0x5aa5&&CommandSafetyVal2==0xa55a) && (CommandTimeMD5==MD5 (CommandTime)) &&&
Separating brake executes order effectively when (ExecuteTimeMD5==MD5 (ExecuteTime)) expression formula is true, and equipment executes separating brake
Operation；When (Command==1&&CommandSafetyVal1==0xa55a&&CommandSafetyVal2==
0x5aa5) && (CommandTimeMD5==MD5 (CommandTime)) &&& (ExecuteTimeMD5==MD5
(ExecuteTime)) order is closed a floodgate when expression formula is true effectively, equipment executes closing operation.
From the foregoing, it will be observed that the design of this distant control function almost can be avoided the data failure in all links, to guarantee
The safety of remote control process, but following disadvantage is also brought simultaneously:
1) reinforce safety verification and bring more time overheads, remote control real-time delay；
2) reinforce safety verification and bring more space expenses, memory, hard-disc storage increase；
3) the PSCADA device side supported must make corresponding change；
Above in relation to be remote control selection, execute order downlink data safe design, can also be right under necessary situation
Similar same safe handling is done in selection, exectorial feeding back uplink data, and the application is not repeating the process.
Typical case
The designed security function of this application is mainly used for needing to meet the urban track traffic comprehensively monitoring of SIL2 grade
In system, although the temporary non-SIL2 class requirement of most domestic urban track traffic comprehensive monitoring system at present, from new bid
Project in from the point of view of, substantially propose such requirement, therefore the security function is certain to extensively within the coming years
Using in actual items.
Claims (5)
1. safe distant control function design method in a kind of comprehensive monitoring system, the platform data tissue of SCADA monitoring system
Basic unit is object, and the relationship in system between all data and data is with object or the formal distribution of object properties
In various object types, each object type is numbered by a unique ObjectId, it is characterised in that:
Step 1: the remote control equipment modeling procedure based on object-oriented, is that every kind of remote control equipment designs corresponding remote control dialog box
HMI, for being operated with dispatcher；
Step 2: remote control security design procedure avoids CPU, memory randomness mistake, communication chain during remote control operation
The abnormal caused operational order disorder bring mistake such as road error of transmission.
2. safe distant control function design method in comprehensive monitoring system according to claim 1, which is characterized in that step
In one:
Lack of competence illegal operation is avoided, all operation buttons carry out permission judgement in dialog box, and the user of no operating right beats
The operation button in dialog box opened is Disabled inoperable state；
Each equipment only allows operator's opening to operate, by judging the Lock attribute in breaker data model,
Only allow an operator to open the remote control dialog box of an equipment at any time, i.e., it is another after an operator opens
A operator cannot open the remote control dialog box of the equipment again；
Safety operation logic judgment in interface determines whether certain operation according to all remote signalling states of current device.
3. safe distant control function design method in comprehensive monitoring system according to claim 1, which is characterized in that step
In two:
Addition is used for the specific properties of safety verification on 2 remotely-controlled object point data model of table:
To be originally used for 0,1 Command remote control select command split, be indicated, write using two compound commands
The two attributes of CommandSafetyVal1, CommandSafetyVal2 are also write while Command attribute；Command0 pairs
It is 0x5aa5 that CommandSafetyVal1, which should be write, and CommandSafetyVal2 is 0xa55a；Command1 correspondence is write
CommandSafetyVal1 is 0xa55a, and CommandSafetyVal2 is 0x5aa5；
The write-in of CommandTime remote control selection time is not to determine when the write-in of Command attribute, but be written
It is read again after Command, CommandSafetyVal1, CommandSafetyVal2 attribute of platform data model by dialog box
These three attributes of current device are taken, and judge (Command==0&&CommandSafetyVal1==0x5aa5&&
) or (Command==1&&CommandSafetyVal1==0xa55a&& CommandSafetyVal2==0xa55a
CommandSafetyVal2==0x5aa5 the CommandTime remote control selection time) is written when being true again, and will remote control selection
Attribute CommandTimeMD5 is written in the md5 encryption character string of time character string.ExecuteTime attribute is pressed in click " execution "
It is written when button, and attribute ExecuteTimeMD5 is written into the md5 encryption character string that remote control executes time character string simultaneously, it is this
Mechanism can effectively avoid all exceptions that data are written from the interface HMI to system platform device model；
Remote control selection data content, remote control are executed into data content using the extension ASDU of Standards Code in data transmission protocol
It is transmitted to PSCADA appliance arrangement.
4. safe distant control function design method in comprehensive monitoring system according to claim 3, it is characterised in that:
The use of 0x5aa5 and 0xa55a avoids the common mode failure that may cause by exception, 0x5aa5 and 0xa55a two into
Number processed is respectively 0,101 1,010 1,010 0101 and 1,010 0,101 0,101 1010；The inside of 0x5aa5 or 0xa55a number exists
Distance on 1bits, 4bits, 8bits reaches maximum；And the value of 0x5aa5 and 0xa55a step-by-step exclusive or is 0xFFFF, i.e.,
The distance between they are also maximum；The design of this group of data can effectively avoid depositing in CPU, memory, hard disk due to data
Data bit entanglement caused by the reasons such as potential anomalies occurs when storage.
5. safe distant control function design method in comprehensive monitoring system according to claim 3, it is characterised in that:
Remote control selection data content: select command Command, selection time CommandTime, safety selection attribute data
CommandSafetyVal1,CommandSafetyVal2,CommandTimeMD5.PSCADA appliance arrangement is receiving remote control
It is verified after selection data: as (Command==0&&CommandSafetyVal1==0x5aa5&&
CommandSafetyVal2==0xa55a) && (CommandTimeMD5==MD5 (CommandTime)) expression formula is true
When separating brake select command it is effective；As (Command==1&&CommandSafetyVal1==0xa55a&&
CommandSafetyVal2==0x5aa5) && (CommandTimeMD5==MD5 (CommandTime)) expression formula is true
When combined floodgate select command it is effective；
Remote control executes data content: select command Command, selection time CommandTime, executing data
ExecuteTrigger, execute time ExecuteTime, safety selection attribute data CommandSafetyVal1,
CommandSafetyVal2, CommandTimeMD5, safety execute attribute data ExecuteTimeMD5.PSCADA device is set
It is standby to be verified after receiving remote control and executing data: as (Command==0&&CommandSafetyVal1==
0x5aa5&&CommandSafetyVal2==0xa55a) && (CommandTimeMD5==MD5 (CommandTime)) &&&
Separating brake executes order effectively when (ExecuteTimeMD5==MD5 (ExecuteTime)) expression formula is true, and equipment executes separating brake
Operation；When (Command==1&&CommandSafetyVal1==0xa55a&&CommandSafetyVal2==
0x5aa5) && (CommandTimeMD5==MD5 (CommandTime)) &&& (ExecuteTimeMD5==MD5
(ExecuteTime)) order is closed a floodgate when expression formula is true effectively, equipment executes closing operation.
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| CN110069036B (en) | 2021-07-02 |
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