CN110474327B - CPS (control performance Standard) information-physical combination expected fault generation method and system for power distribution network - Google Patents
CPS (control performance Standard) information-physical combination expected fault generation method and system for power distribution network Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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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
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The invention discloses a CPS information-physical combination expected fault generation method for a power distribution network, which comprises the steps of constructing an information expected fault set and a physical expected fault set; configuring information expected faults in the recovery process for each physical expected fault, and constructing information-physical combination expected faults; and screening out the expected faults of the required information-physical combination according to a preset rule. A corresponding method is also disclosed. The expected failure constructed by the invention is an information-physical combination expected failure, takes the information expected failure into account, and is suitable for CPS security analysis of the existing power distribution network.
Description
Technical Field
The invention relates to a CPS information-physical combination expected fault generation method and system for a power distribution network, and belongs to the technical field of power distribution networks.
Background
With the advance of smart grid and energy internet strategies, the high coupling of information and physics has become a key feature of smart distribution networks. The addition of the information system improves the operation of the CPS (distribution network information physical system), but certain risks and influences are brought to the operation safety of the CPS, chain faults can be caused through an information physical coupling mechanism in the serious case, the CPS of the whole distribution network is paralyzed, and certain influences are brought to daily production and life. In the power distribution network CPS, the influence degree of information on a physical system mainly depends on the role of information functions in processing and recovering power grid faults. When a physical system breaks down, the simultaneous failure of information will affect the fault processing process and deteriorate the system state, and if the system breaks down, the cascade fault will be caused by the control function failure of the circuit breaker.
If the power distribution network CPS is greatly disturbed, an expected fault set needs to be established first, and the safety of the power distribution network CPS is analyzed through the expected faults. With the development of the CPS of the power distribution network, the CPS of the power distribution network is continuously enlarged due to the access of an information system and a new energy system, and with the high coupling of information physics, the influence of an information side cannot be ignored, so that an expected fault set only considering the faults of the physical side is not suitable for the safety analysis of the CPS of the existing power distribution network.
Disclosure of Invention
The invention provides a CPS information-physical combination expected fault generation method and system for a power distribution network, and solves the problems disclosed in the background technology.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the CPS information-physical combination expected fault generation method for the power distribution network comprises the following steps:
constructing an information expected fault set and a physical expected fault set;
configuring information expected faults in the recovery process for each physical expected fault, and constructing information-physical combination expected faults; the information expected fault and the physical expected fault are elements in the information expected fault set and the physical expected fault set respectively;
and screening out the required information-physical combination expected faults from the information-physical combination expected faults according to a preset rule.
The process of constructing the information-physical combination expected failure comprises the following steps:
determining a recovery scheme corresponding to the physical expected failure;
determining nodes and paths involved in a recovery scheme;
configuring an information expected fault corresponding to the physical expected fault based on the nodes and the paths;
wherein the information expected failure and the corresponding physical expected failure constitute an information-physical combination expected failure.
The information anticipation failure includes a data error, a transmission failure, and a control failure.
The data error configuration process comprises the following steps:
in the fault location stage of the recovery process, a correct fault location matrix is changed;
the transmission fault configuration process comprises the following steps:
setting transmission faults on an uplink and downlink path and path nodes;
the control fault configuration process comprises the following steps:
and setting control refusing action and misoperation faults aiming at the control instruction.
And calculating the failure recovery rate based on the information-physical combination expected failure, and screening out the information-physical combination expected failure corresponding to the failure recovery rate smaller than the threshold value.
The formula of the failure recovery rate is:
where ρ is rec For failure recovery rate, P i For the actual recovered power of node i, L i Is the original power requirement of node i, w i Is the grade weight of the node load; t (a, b) is the failure recovery time after the occurrence of the information expected failure, a represents the position of the occurrence of the information expected failure, b represents the recoveryThe information in the program anticipates the type of failure,
the representation is a set of failed segment, non-failed segment nodes.
CPS information-physical combination forecast fault generation system for power distribution network, comprising:
a fault set construction module: constructing an information expected fault set and a physical expected fault set;
a combined fault construction module: configuring information expected faults in the recovery process for each physical expected fault, and constructing information-physical combination expected faults; the information expected fault and the physical expected fault are elements in the information expected fault set and the physical expected fault set respectively;
a screening module: and screening out the required information-physical combination expected faults from the information-physical combination expected faults according to a preset rule.
The combined fault construction module comprises:
a recovery scheme module: determining a recovery scheme corresponding to the physical expected failure;
a node path module: determining nodes and paths involved in a recovery scheme;
a configuration module: configuring an information expected fault corresponding to the physical expected fault based on the nodes and the paths;
combining the modules: the information forecast failure and the corresponding physical forecast failure constitute an information-physical combination forecast failure.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform a power distribution network CPS information-physical combination anticipation failure generation method.
A computing device comprising one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing a power distribution network CPS information-physical combination expected failure generation method.
The invention achieves the following beneficial effects: the expected failure constructed by the invention is an information-physical combination expected failure, takes the information expected failure into account, and is suitable for CPS security analysis of the existing power distribution network.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a flow chart for constructing an information-physical combination expected failure;
fig. 3 is a flow chart of fault location.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the method for generating CPS information-physical combination expected faults of a power distribution network comprises the following steps:
The information expected faults are all known information faults of the power distribution network CPS, namely information faults occurring in the actual operation process, and the physical expected faults are all known physical faults of the power distribution network CPS, namely physical faults occurring in the actual operation process.
Here, the physical fault is mainly a disconnection of a line, and the information fault is divided into three types including a data error, a transmission fault, and a control fault.
The data error is the error of the information collected by the node, the transmission fault is the time delay and the terminal of the information in the transmission process, and the control fault is the refusing action and the misoperation of the control terminal; in the information correlation matrix, it can be described as:
c ij ＝[M ij ,T ij ,B ij ,H ij ]；
wherein M is ij 、T ij 、B ij 、H ij Respectively representing data errors, transmission delays, transmission interruptions and control failures between node i and node j, c ij And (4) associating a matrix for the information between the node i and the node j.
Step 2, traversing the physical expected fault set, configuring information expected faults in the recovery process for each physical expected fault, and constructing information-physical combination expected faults; the information forecast failure is an element in the information forecast failure set.
As shown in fig. 2, the process of constructing the information-physical combination expected failure is as follows:
21) a recovery scheme corresponding to the physically expected failure is determined.
22) The nodes and paths involved in the recovery scheme are determined.
23) And configuring the information expected faults corresponding to the physical expected faults based on the nodes and the paths.
Setting data errors in a fault positioning stage; the transmission fault and the control fault are set in the fault isolation and power restoration stages.
And (3) data error configuration:
each node uploads an overcurrent fault information matrix F:
in the formula: f. of i Represents overcurrent information on node i; 1 indicates that current flows; 0 means no current flows.
From the overcurrent fault information matrix F, it is possible to locate a fault and determine a range in which a physical expected fault occurs.
Generating a fault positioning matrix D:
in the formula: d i Indicating fault state information of the node i; 1 indicates that the node is normal; 0 represents a node failure.
The specific flow is shown in fig. 3:
A1) constructing an element p in the incidence matrix p, p according to physical expected faults i 1 denotes a branch with a connection at node i, p i 0 denotes a branch with no connection to node iA way;
A2) judging whether each node has overcurrent or not, and constructing a current fault information matrix F;
A3) when p is i 1 and f i If the node i is normal, otherwise, the node i fails;
A4) and constructing the fault location matrix D according to the fault state information of each node in A3.
The data error configuration may be formed by modifying the 0/1 values in the fault location matrix, i.e., modifying the correct fault location matrix.
And (3) transmission fault configuration:
in the CPS recovery process of the power distribution network, the communication network has two functions of fault information uploading and control instruction issuing. After the CPS physical expected fault of the power distribution network occurs, a feasible path L for uploading fault information and issuing a control instruction is determined through path search, namely a path and a path node related to the physical expected fault are determined.
Controlling fault configuration:
and secondary equipment (a circuit breaker, a contact switch and the like) in the power distribution network CPS executes recovery operation according to the received recovery operation instruction sent by the decision analysis layer. The decision analysis layer makes a recovery scheme according to the received fault information and generates a control instruction matrix H comprising a fault isolation instruction matrix H 1 And a power restoration instruction matrix H 2 。
Fault isolation instruction matrix H 1 ：
In the formula: h is i Indicating a command operation to the load switch of node i; 1 represents the closing of a load switch of a node i; and 0 represents that the load switch of the node i is opened, namely, the node of the fault section is subjected to isolation operation.
Power restoration instruction matrix H 2 ：
In the formula: s is i Representing tie switches and distributed power switches;
indicating commanded operation of tie switches and distributed power switches; 1 indicates that the switch is on; 0 indicates that the switch is open, i.e., power is restored to the non-faulted section.
The control fault is constructed by a control instruction execution matrix, and comprises a fault isolation execution matrix and a power supply recovery execution matrix; and setting control refusing action and misoperation faults aiming at the control instruction.
24) The information forecast failure and the corresponding physical forecast failure constitute an information-physical combination forecast failure.
And 3, screening out the required information-physical combination expected faults from the information-physical combination expected faults according to a preset rule.
And calculating the failure recovery rate based on the information-physical combination expected failures, sorting the failure recovery rates from small to large, and screening out the information-physical combination expected failures corresponding to the failure recovery rates smaller than the threshold value.
The formula for the failure recovery rate is as follows:
wherein ρ rec For failure recovery rate, P i For the actual recovered power of node i, L i Is the original power requirement of node i, w i Is the grade weight of the node load; t (a, b) is the failure recovery time after the occurrence of the expected failure of the information, a represents the position of the occurrence of the expected failure of the information, b represents the type of the expected failure of the information during the recovery process,
the representation is a set of failed segment, non-failed segment nodes.
The expected faults constructed by the method are information-physical combination expected faults, the information expected faults are calculated, and the method is suitable for CPS safety analysis of the existing power distribution network.
CPS information-physical combination forecast fault generation system for power distribution network, comprising:
a fault set construction module: and constructing an information expected fault set and a physical expected fault set.
A combined fault construction module: configuring information expected faults in the recovery process for each physical expected fault, and constructing an information-physical combination expected fault; the information expected failure and the physical expected failure are elements in the information expected failure set and the physical expected failure set, respectively.
The combined fault building module comprises:
a recovery scheme module: determining a recovery scheme corresponding to the physical expected failure;
a node path module: determining nodes and paths involved in a recovery scheme;
a configuration module: configuring an information expected fault corresponding to the physical expected fault based on the nodes and the paths;
combining the modules: the information forecast failure and the corresponding physical forecast failure constitute an information-physical combination forecast failure.
A screening module: and screening out the required information-physical combination expected faults from the information-physical combination expected faults according to a preset rule.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to power distribution network CPS information-physical combination anticipation failure generation method.
A computing device comprising one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing a power distribution network CPS information-physical combination expected failure generation method.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (8)
1. The CPS information-physical combination expected fault generation method for the power distribution network is characterized by comprising the following steps of: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
constructing an information expected fault set and a physical expected fault set;
configuring information expected faults in the recovery process for each physical expected fault, and constructing an information-physical combination expected fault; the information expected fault and the physical expected fault are elements in the information expected fault set and the physical expected fault set respectively; the process of constructing the information-physical combination expected fault comprises the following steps: determining a recovery scheme corresponding to the physical expected failure; determining nodes and paths involved in a recovery scheme; configuring an information expected fault corresponding to the physical expected fault based on the nodes and the paths; wherein the information expected faults and the corresponding physical expected faults constitute information-physical combination expected faults;
and screening out the required information-physical combination expected faults from the information-physical combination expected faults according to a preset rule.
2. The CPS information-physical combination expected fault generation method for the power distribution network as claimed in claim 1, wherein the CPS information-physical combination expected fault generation method comprises the following steps: the information forecast failures include data errors, transmission failures, and control failures.
3. The CPS information-physical combination expected fault generation method for the power distribution network as claimed in claim 2, wherein: the data error configuration process is that,
in the fault location stage of the recovery process, a correct fault location matrix is changed;
the configuration process of the transmission fault is that,
setting transmission faults on an uplink and downlink path and path nodes;
the control fault configuration process comprises the following steps of,
and setting control refusing action and misoperation faults aiming at the control instruction.
4. The CPS information-physical combination expected fault generation method for the power distribution network as claimed in claim 1, wherein the CPS information-physical combination expected fault generation method comprises the following steps: and calculating the failure recovery rate based on the information-physical combination expected failure, and screening out the information-physical combination expected failure corresponding to the failure recovery rate smaller than the threshold value.
5. The distribution network CPS information-physical combination expected fault generation method of claim 4, characterized in that: the formula for the failure recovery rate is that,
where ρ is rec For failure recovery rate, P i For the actual recovered power of node i, L i Is the original power requirement of node i, w i Is the grade weight of the node load; t (a, b) is the failure recovery time after the occurrence of the expected failure of the information, a represents the position of the occurrence of the expected failure of the information, b represents the type of the expected failure of the information during the recovery process,
the representation is a set of failed segment, non-failed segment nodes.
6. CPS information-physical combination forecast fault generation system of distribution network, its characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a fault set construction module: constructing an information expected fault set and a physical expected fault set;
a combined fault construction module: configuring information expected faults in the recovery process for each physical expected fault, and constructing information-physical combination expected faults; the information expected fault and the physical expected fault are elements in the information expected fault set and the physical expected fault set respectively;
the combined fault construction module comprises a fault construction module,
a recovery scheme module: determining a recovery scheme corresponding to the physical expected failure;
a node path module: determining nodes and paths involved in a recovery scheme;
a configuration module: configuring an information expected fault corresponding to the physical expected fault based on the nodes and the paths;
combining the modules: the information expected faults and the corresponding physical expected faults form information-physical combination expected faults;
a screening module: and screening out the required information-physical combination expected faults from the information-physical combination expected faults according to a preset rule.
7. A computer readable storage medium storing one or more programs, wherein: the one or more programs include instructions that, when executed by a computing device, cause the computing device to perform any of the methods of claims 1-5.
8. A computing device, characterized by: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the methods of claims 1-5.
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| CN112165491B (en) * | 2020-09-29 | 2021-09-03 | 武汉大学 | Cross-space cascading fault self-adaptive early warning method and system for power grid information physical system |
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