CN102970188A - 110kV digital transformer substation security network - Google Patents
110kV digital transformer substation security network Download PDFInfo
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- CN102970188A CN102970188A CN2012105177206A CN201210517720A CN102970188A CN 102970188 A CN102970188 A CN 102970188A CN 2012105177206 A CN2012105177206 A CN 2012105177206A CN 201210517720 A CN201210517720 A CN 201210517720A CN 102970188 A CN102970188 A CN 102970188A
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Abstract
The invention relates to a 110kV digital transformer substation security network which comprises a network security estimation system for acquiring the current security state of a network, an active defense system for performing active defense and preventing data invading in the network, and a power network security system for guaranteeing communication network security of a 110kV digital transformer substation. By the technical scheme, a network security situation can be precisely forecast and the forecast precision of the network security situation can be improved.
Description
Technical field
The present invention relates to a kind of control network, be specifically related to a kind of 110kV digital transformer substation secure network.
Background technology
Cause the reason in Weihai that the following aspects is arranged to network security
1, system's self reason
The opening of network: the opening of network system and wide regional coverage design are so that the secret difficulty increasing of data.The safety problem that wherein also comprises the wiring of network self and communication quality and cause.The leak of software: communication protocol and communication software system imperfection, stayed hidden danger for the invasion of various unsafe factors.The electromagnetic exposure of radio communication: the data in the wireless communication system are aloft propagated with electromagnetic form, the possibility that exists electromagnetic wave easily to be intercepted and captured.
2, human factor
The internal staff divulges a secret: the shortage awareness of safety is arranged, the unconscious personnel that divulge a secret; Also utilize legal identity to enter network, the personnel that have purpose to destroy.Network hacker: the hacker who invades network maliciously steals, distorts and corrupt data, and network is consisted of great threat.Also have Internet-related crimes personnel illegally using and destroying network.Computer virus: the propagation that the computer virus that emerges in multitude is exceedingly fast on the net, brought huge disaster to network security.
3, other reasons
Also have unsound such as security precautions technology, integrity problem and management system, the carelessness of safety legislation, and the infringement of irresistible natural calamity and contingency etc.
Communications network security generally includes bearer network safety and service network safety, and network service safety and information are transmitted safety.Bearer network safety and service network rescue bag includes network reliability and survivability, network reliability and survivability rely on the aspects such as Environmental security, physical security, node security, link safety, topological safety, system safety to ensure; Network service comprises safely service availability and service controllability.Service availability is relevant with service network reliability and the ability of maintenance etc. with bearer network.The service controllability relies on the service access security, and service is anti-denies, serves the aspect such as attack protection and ensure; The information transmission comprises safely information integrity, confidentiality and non-repudiation.Information integrity can rely on the message authentication scheme to ensure; The information confidentiality can rely on encryption mechanism and key distribution etc. to ensure, the information non-repudiation can rely on the technical guarantees such as digital signature.
Therefore, there is defective in prior art, needs to improve.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, a kind of 110kV digital transformer substation secure network is provided.
Realize the technical measures of above-mentioned purpose:
A kind of 110kV digital transformer substation secure network wherein, comprising: the network security assessment system, and described network security assessment system is used for knowing the safe condition that network is current; Active Defending System Against, described Active Defending System Against are used for initiatively defence and stop the data of invasion network; The power network security system, described power network security system is used for the communications network security of 110kV digital transformer substation.
Described 110kV digital transformer substation secure network, wherein, described network security assessment system also is provided with the Network Situation prediction unit, and described Network Situation prediction unit comprises statistical module at least, is used for the number of frequencies statistics that network safety event occurs; The predetermined value module that is connected with described statistical module is for the predetermined value of the compromised degree of setting network; The comparison module that is connected with described predetermined value module is used for drawing more afterwards with described predetermined value module the concrete data of the compromised degree of network; The computing module that is connected with described comparison module, being used for concrete data to the compromised degree of network in the number of frequencies of described statistical module and the described comparison module is weighted to process and calculates network operation situation situation value and send to feedback module, described feedback module respectively with described statistical module, described predetermined value module, described comparison module, described computing module connect respectively, be used for feeding back the data of modules, and provide the feedback report of future network Security Trend prediction according to the network operation situation situation value that receives.
Described 110kV digital transformer substation secure network, wherein, described Network Situation prediction unit also is provided with logging modle, utilizes NSS record current goal security status, and the data occurrence of described NSS is NSSV.
Described 110kV digital transformer substation secure network, wherein, described network security assessment system also is provided with network management and safety monitoring device, described network management and safety monitoring device comprise statistical module, be used for the statistics network link information and or system management messages and or system monitoring information and or application service information; Computing module, be used for by entropy power method and or analytic hierarchy process (AHP) calculate the security postures index weights; Comparison module draws the network safety situation value for described security postures index is assessed; Analog module is used for simulation and draws network safety situation figure.
Described 110kV digital transformer substation secure network, wherein, described Active Defending System Against also is provided with detection module, for detection of unknown attack information, the Zero-day Attack information of network; Setting module, when described detection module detect described unknown attack information and or set Initiative Defense during Zero-day Attack information.
Described 110kV digital transformer substation secure network, wherein, described power network security system also is provided with detection module, for detection of the Network Communicate Security threat information; The safety guarantee module is used for providing the network security guarantee when detection module detects described Network Communicate Security threat information.
Described 110kV digital transformer substation secure network, wherein, described Network Communicate Security threat information comprises at least acquisition of information, interrupting information, distorts information, rogue program information one of them.
Described 110kV digital transformer substation secure network, wherein, described safety guarantee module comprises the digital signature submodule, is used for requiring when described detection module detects described Network Communicate Security threat information digital signature.
Described 110kV digital transformer substation secure network, wherein, described safety guarantee module also comprises the multiple agent submodule, be used for to set to detect when being monitored node and being attacked, corresponding agent side is carried out first defence.
Described 110kV digital transformer substation secure network, wherein, described safety guarantee module also comprises the fire compartment wall submodule, is used for making up fire compartment wall between different network security territories.
Adopt technical scheme of the present invention, can realize the network safety situation accurately predicting, in order to improve the network safety situation precision of prediction.And can realize the network safety situation value of various discrete time supervision point is configured to the relevant multiple regression data sequence of partial linear, be input to the improvement generalized regression nerve networks with it as sample set and trained, and then obtain the network safety situation forecast model.
Description of drawings
Fig. 1 is Network Situation prediction unit schematic diagram among the present invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that protection scope of the present invention are made more explicit defining.
Embodiment one
The network security assessment system for the safe condition of knowing that effectively communication network is current, determines the weak link in the network, and then selects suitable network security safeguard.Particularly when the communication performance requirement of network contradicts with some network security safeguard, can accept or reject according to the result of network security assessment, guarantee the unobstructed and safety of communication network.Network security assessment mainly from physical security, study carefully full control, managing secure data safety and the several levels of technical security and assess.
The Network Situation prediction unit is the number of frequencies that occurs according to network safety event, and the difference of the compromised degree of network, process by weighting, become one can show the network operation situation situation value network security information fusion of magnanimity, then with current network safety situation value future network Security Trend prediction network safety situation is subjected to attack according to historical.
Network attack of a great variety, its realization mechanism and harm also are not quite similar, thereby are difficult to directly to describe the current network safe condition with the intrusion detection result of the Network Security Devices such as fire compartment wall and intruding detection system.Common method is to utilize NSS to describe the safe condition of current goal network.NSS refers in monitoring point sometime, if the variation tendency of the whole network current safe state that the factors such as various device operation conditions, network behavior and user behavior consist of in the objective network and variation tendency energy accurately predicting NSS, then can effectively evade and guarding network attack, reduce network risks.NSSV is the embodiment that quantizes of NSS, and also is the Data Source of NSSF.
Network management and safety monitoring device, by the research to trustable network connecting frame (TNC) and network situation awareness system (CSA), for multi-data source certainty and probabilistic characteristics in the trustable network safety, networks security situation assessment and Forecasting Methodology SPSAF based on Set Pair Analysis have been proposed.SPSAF at first adopts method auditing the network link information system management messages system monitoring information and the application service information based on feature database, then comprehensive improved entropy power method and analytic hierarchy process (AHP) extract the security postures index weights, the recycling Method of Set Pair Analysis is assessed the security postures index and is obtained the network safety situation value, and then drafting network safety situation figure, adopt at last the Box-Jenkin model based on security postures value prediction network security trend. the simulation experiment result shows that SPSAF can reflect the current and following network safety situation accurately and effectively, help the keeper effectively to formulate network security policy, and can in time find risk, adjust quickly and accurately strategy and implement counter-measure, more comprehensively reliably network security guarantee is provided.
Active Defending System Against, existing intrusion detection, firewall technology take the mode of security strategy configuration to come the fail safe of protecting network mostly.Yet these static Passive Defence technology can't be finished dynamic safety guarantee effectively in the face of unknown attack in the network, Zero-day Attack the time.The mechanism that some resist an invasion is set in system, and these mechanism are carried out the active defence when the invasion network enters internal system, stop the invasion data transfer, thus the person's of resisting an invasion invasion.
The power network security system, the network architecture of setting up based on IEC61850 is consistent at upper-layer protocol, this has improved the interoperability of power transformation station equipment greatly.
Attack to transformer station may from the external network of substation's connection, also may come from the inside of transformer station.These security threats mainly comprise:
(1) intercepts and captures.Illegally obtain the information of transmitting between transformer station and the other system or illegally obtain canned data in transformer station's network.This is transformer station's network system beginning of suffering security violation often.Under the Electricity Market Operation environment, avoid information acquisition very important.
(2) interrupt.Make transformer station inner or and other system between communication disruption, make scheduling station can't understand the operating condition of transformer station, the control command of main website also can't correctly be carried out.
(3) distort.Guidance command, the order of modification definite value etc. make scheduling station obtain wrong operating condition, or cause accident in the transformer station in the information of transmitting between change transformer station and the other system or the transformer station.
(4) rogue program.Comprise the computer viruses such as computer worm, Trojan Horse, logic bomb, have a strong impact on correctness, real-time and the reliability of transformer substation system operation, and may make systemic breakdown.
The network security safeguard module of digital transformer substation comprises:
One strategy that is based on digital signature adopts the digital signature submodule, and at first transmit leg imposes mathematic(al) manipulation to information, and the information of gained is only corresponding with prime information; Then the recipient carries out inverse transformation, obtains raw information.As long as the mathematic(al) manipulation method is good, the information after the conversion just has very strong fail safe in transmission, be difficult to be decrypted, distort.
Two are based on the virtual net submodule, just can effectively realize the safety isolation of information by divide different application (and not needing corresponding physical port) at logical layer based on the vlan technology of stipulations.
Three are based on the multiple agent submodule, multiple agent is the Disciplinary Frontiers of distributed artificial intelligence DA I (Distributed Arti2ficial Intelligence) research, the system that is formed by a plurality of intelligent bodies, application study to multiple agent is based upon on the distributed environment basis, the key character that digital transformer substation embodies is exactly that electric substation automation system is rendered as layered distribution type, information interaction between the various IED equipment realizes by the network communications technology, on this technical characterictic, the digital transformer substation LAN backbone is very suitable for the application of multiple agent.
Based on the adaptive network safety of multiple agent, be characterized in the corresponding intelligent body of each node that is monitored.When detecting when being monitored node and being attacked, corresponding A gent carries out first corresponding strategy.If this intelligent body can not be dealt with problems, then intelligent body is coordinated in request.Coordinate intelligent body by analysis, can with reference to Security Policy Database, coordinate a plurality of intelligent bodies and jointly solve.If all can't resolve, coordinate the same processing of intelligent body do by coordinating intelligent body request upper level again.Major advantage is: 1. on-line study system can sum up invader's characteristics and formulate Counter-measures, and the equipment that prevents other is attacked, and 2. offered load is light, high efficiency, and most intelligent body can solve safety problem in the locality.In the load-center substation, can consider to install additional the network security management system based on multiple agent, the attack that sees through fire compartment wall is detected and takes Corresponding Countermeasures in real time, with the security performance of further raising network.
Four are based on the fire compartment wall submodule, fire compartment wall has made up safety curtain one between heterogeneous networks or network security territory, it allows legal TCP/IP data flow to pass through by refusing selectively illegal port, can not flow to illegal place with data and the resource that guarantees in-house network.The different factor combinations such as the IP address of firewall security technical support message, agreement, application port number, application protocol, message direction.According to the difference of place of safety Business Nature, arranging of firewall security policy can be distinguished to some extent.Generally speaking, the work of fire compartment wall is generally all very effective, can stop adventurous Internet access to enter in-house network.
Embodiment two
As shown in Figure 1, a kind of 110kV digital transformer substation secure network wherein, comprising: the network security assessment system, and described network security assessment system is used for knowing the safe condition that network is current; Active Defending System Against, described Active Defending System Against are used for initiatively defence and stop the data of invasion network; The power network security system, described power network security system is used for the communications network security of 110kV digital transformer substation.
In above-described embodiment, described network security assessment system also is provided with the Network Situation prediction unit, and described Network Situation prediction unit comprises statistical module at least, is used for the number of frequencies statistics that network safety event occurs; The predetermined value module that is connected with described statistical module is for the predetermined value of the compromised degree of setting network; The comparison module that is connected with described predetermined value module is used for drawing more afterwards with described predetermined value module the concrete data of the compromised degree of network; The computing module that is connected with described comparison module, being used for concrete data to the compromised degree of network in the number of frequencies of described statistical module and the described comparison module is weighted to process and calculates network operation situation situation value and send to feedback module, described feedback module respectively with described statistical module, described predetermined value module, described comparison module, described computing module connect respectively, be used for feeding back the data of modules, and provide the feedback report of future network Security Trend prediction according to the network operation situation situation value that receives.
In above-described embodiment, described Network Situation prediction unit also is provided with logging modle, utilizes NSS record current goal security status, and the data occurrence of described NSS is NSSV.
In above-described embodiment, described network security assessment system also is provided with network management and safety monitoring device, described network management and safety monitoring device comprise statistical module, be used for the statistics network link information and or system management messages and or system monitoring information and or application service information; Computing module, be used for by entropy power method and or analytic hierarchy process (AHP) calculate the security postures index weights; Comparison module draws the network safety situation value for described security postures index is assessed; Analog module is used for simulation and draws network safety situation figure.
In above-described embodiment, described Active Defending System Against also is provided with detection module, for detection of unknown attack information, the Zero-day Attack information of network; Setting module, when described detection module detect described unknown attack information and or set Initiative Defense during Zero-day Attack information.
In above-described embodiment, described power network security system also is provided with detection module, for detection of the Network Communicate Security threat information; The safety guarantee module is used for providing the network security guarantee when detection module detects described Network Communicate Security threat information.
In above-described embodiment, described Network Communicate Security threat information comprises at least acquisition of information, interrupting information, distorts information, rogue program information one of them.
In above-described embodiment, described safety guarantee module comprises the digital signature submodule, is used for requiring when described detection module detects described Network Communicate Security threat information digital signature.
In above-described embodiment, described safety guarantee module also comprises the multiple agent submodule, be used for to set to detect when being monitored node and being attacked, and corresponding agent side is carried out first defence.
In above-described embodiment, described safety guarantee module also comprises the fire compartment wall submodule, is used for making up fire compartment wall between different network security territories.
Above embodiment is more preferably one of embodiment of the present invention, and common variation and the replacement of those skilled in the art in the solution of the present invention scope all should be included in protection scope of the present invention.
Claims (10)
1. a 110kV digital transformer substation secure network is characterized in that, comprising: the network security assessment system, and described network security assessment system is used for knowing the safe condition that network is current; Active Defending System Against, described Active Defending System Against are used for initiatively defence and stop the data of invasion network; The power network security system, described power network security system is used for the communications network security of 110kV digital transformer substation.
2. 110kV digital transformer substation secure network as claimed in claim 1, it is characterized in that, described network security assessment system also is provided with the Network Situation prediction unit, and described Network Situation prediction unit comprises statistical module at least, is used for the number of frequencies statistics that network safety event occurs; The predetermined value module that is connected with described statistical module is for the predetermined value of the compromised degree of setting network; The comparison module that is connected with described predetermined value module is used for drawing more afterwards with described predetermined value module the concrete data of the compromised degree of network; The computing module that is connected with described comparison module, being used for concrete data to the compromised degree of network in the number of frequencies of described statistical module and the described comparison module is weighted to process and calculates network operation situation situation value and send to feedback module, described feedback module respectively with described statistical module, described predetermined value module, described comparison module, described computing module connect respectively, be used for feeding back the data of modules, and provide the feedback report of future network Security Trend prediction according to the network operation situation situation value that receives.
3. 110kV digital transformer substation secure network as claimed in claim 2 is characterized in that, described Network Situation prediction unit also is provided with logging modle, utilizes NSS record current goal security status, and the data occurrence of described NSS is NSSV.
4. 110kV digital transformer substation secure network as claimed in claim 1, it is characterized in that, described network security assessment system also is provided with network management and safety monitoring device, described network management and safety monitoring device comprise statistical module, be used for the statistics network link information and or system management messages and or system monitoring information and or application service information; Computing module, be used for by entropy power method and or analytic hierarchy process (AHP) calculate the security postures index weights; Comparison module draws the network safety situation value for described security postures index is assessed; Analog module is used for simulation and draws network safety situation figure.
5. 110kV digital transformer substation secure network as claimed in claim 1 is characterized in that described Active Defending System Against also is provided with detection module, for detection of unknown attack information, the Zero-day Attack information of network; Setting module, when described detection module detect described unknown attack information and or set Initiative Defense during Zero-day Attack information.
6. 110kV digital transformer substation secure network as claimed in claim 1 is characterized in that, described power network security system also is provided with detection module, for detection of the Network Communicate Security threat information; The safety guarantee module is used for providing the network security guarantee when detection module detects described Network Communicate Security threat information.
7. 110kV digital transformer substation secure network as claimed in claim 6 is characterized in that, described Network Communicate Security threat information comprises at least acquisition of information, interrupting information, distorts information, rogue program information one of them.
8. 110kV digital transformer substation secure network as claimed in claim 7 is characterized in that, described safety guarantee module comprises the digital signature submodule, is used for requiring when described detection module detects described Network Communicate Security threat information digital signature.
9. 110kV digital transformer substation secure network as claimed in claim 7 is characterized in that, described safety guarantee module also comprises the multiple agent submodule, be used for to set to detect when being monitored node and being attacked, and corresponding agent side is carried out first defence.
10. 110kV digital transformer substation secure network as claimed in claim 7 is characterized in that, described safety guarantee module also comprises the fire compartment wall submodule, is used for making up fire compartment wall between different network security territories.
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| CN102970188B (en) | 2015-09-09 |
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