CN115412448B - Network equipment security assessment method, device and storage medium - Google Patents

Network equipment security assessment method, device and storage medium Download PDF

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Publication number
CN115412448B
CN115412448B CN202211024401.1A CN202211024401A CN115412448B CN 115412448 B CN115412448 B CN 115412448B CN 202211024401 A CN202211024401 A CN 202211024401A CN 115412448 B CN115412448 B CN 115412448B
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magnetic field
frequency magnetic
power frequency
equipment
substation equipment
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CN115412448A (en
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杭一帆
吕威
陈强
牛年增
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China United Network Communications Group Co Ltd
China Information Technology Designing and Consulting Institute Co Ltd
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China United Network Communications Group Co Ltd
China Information Technology Designing and Consulting Institute Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/14—Network analysis or design
    • H04L41/142—Network analysis or design using statistical or mathematical methods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux

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  • General Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Algebra (AREA)
  • Pure & Applied Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The disclosure provides a network equipment security assessment method, a device and a storage medium, relates to the technical field of communication, and can assess the security of network equipment. The method comprises the following steps: determining the power frequency magnetic field intensity generated by the substation equipment at a plurality of preset positions; determining relative position information of the installation position of the network equipment and the transformer substation equipment; determining the power frequency magnetic field intensity of the installation position according to the power frequency magnetic field intensity generated at a plurality of preset positions and the relative position information; and evaluating the safety of the network equipment according to the power frequency magnetic field intensity of the installation position and the power frequency magnetic field intensity safety threshold of the network equipment. The present disclosure is directed to a process for evaluating security of a network device.

Description

Network equipment security assessment method, device and storage medium
Technical Field
The disclosure relates to the technical field of communication, and in particular relates to a network equipment security assessment method, a network equipment security assessment device and a storage medium.
Background
In the related art, the power frequency magnetic field intensity safety threshold of the network equipment is usually set within the range of 3.78ut, and when the power frequency magnetic field intensity in the construction area of the network equipment is smaller than or equal to the safety threshold of the network equipment, the network equipment can normally and safely operate; when the intensity of the power frequency magnetic field in the construction area of the network equipment is larger than the safety threshold value of the network equipment, the strong power frequency magnetic field can seriously interfere with the safe operation of the network equipment, and the risk of damaging the network equipment exists. Therefore, how to determine the power frequency magnetic field intensity of the network device and further evaluate the security of the network device becomes a technical problem to be solved currently.
Disclosure of Invention
The disclosure provides a network device security assessment method, a device and a storage medium, which can assess the security of network devices.
In order to achieve the above purpose, the present disclosure adopts the following technical scheme:
in a first aspect, a method for evaluating security of a network device is provided, the method comprising: determining the power frequency magnetic field intensity generated by the substation equipment at a plurality of preset positions; determining relative position information of the installation position of the network equipment and the transformer substation equipment; determining the power frequency magnetic field intensity of the installation position according to the power frequency magnetic field intensity generated at a plurality of preset positions and the relative position information; and evaluating the safety of the network equipment according to the power frequency magnetic field intensity of the installation position and the power frequency magnetic field intensity safety threshold of the network equipment.
With reference to the first aspect, in one possible implementation manner, determining the power frequency magnetic field strength generated by the substation equipment at a plurality of preset positions includes: determining a current value of the substation equipment according to the parameter information of the substation equipment; the parameter information includes: rated power, rated voltage, and power factor angle; and determining the power frequency magnetic field intensity generated by the substation equipment at the plurality of preset positions according to the current value of the substation equipment and the position information of the plurality of preset positions.
With reference to the first aspect, in one possible implementation manner, the parameter information of the substation device and the current value of the substation device satisfy the following formula:
wherein i is ab The current value of the transformer substation equipment is; p is rated power of substation equipment; u is the rated voltage of the equipment;is the power factor angle of the device.
With reference to the first aspect, in one possible implementation manner, the power frequency magnetic field strength generated by the substation equipment at a first location meets the following formula, where the first location is any one of a plurality of preset locations:
wherein,the power frequency magnetic field intensity generated at the first position for the substation equipment; mu (mu) 0 Is vacuum magnetic permeability; i.e ab The current value of the transformer substation equipment is; r is the distance between the first position and the substation equipment; θ a An included angle from the first position to a first endpoint of the substation equipment; θ b Is the angle from the first location to the second end point of the substation equipment.
In a second aspect, there is provided a network device security assessment apparatus, including: the device comprises a first determining unit, a second determining unit, a third determining unit and an evaluating unit; the first determining unit is used for determining the power frequency magnetic field intensity generated at a plurality of preset positions of the transformer substation equipment; the second determining unit is used for determining the relative position information of the installation position of the network equipment and the substation equipment; the third determining unit is used for determining the power frequency magnetic field intensity of the installation position according to the power frequency magnetic field intensity generated at a plurality of preset positions and the relative position information; and the evaluation unit is used for evaluating the safety of the network equipment according to the power frequency magnetic field intensity of the installation position and the power frequency magnetic field intensity safety threshold of the network equipment.
With reference to the second aspect, in one possible implementation manner, the first determining unit is specifically configured to: determining a current value of the substation equipment according to the parameter information of the substation equipment and the position information of the plurality of preset positions; the parameter information includes: rated power, rated voltage, and power factor angle; and determining the power frequency magnetic field intensity generated by the substation equipment at a plurality of preset positions according to the current value of the substation equipment.
With reference to the second aspect, in one possible implementation manner, parameter information of the substation device and a current value of the substation device satisfy the following formula:
wherein i is ab The current value of the transformer substation equipment is; p is rated power of substation equipment; u is the rated voltage of the equipment;is the power factor angle of the device.
With reference to the second aspect, in one possible implementation manner, the power frequency magnetic field strength generated by the substation device at a first location satisfies the following formula, where the first location is any one of a plurality of preset locations:
wherein,the power frequency magnetic field intensity generated at the first position for the substation equipment; mu (mu) 0 Is vacuum magnetic permeability; i.e ab The current value of the transformer substation equipment is; r is the distance between the first position and the substation equipment; θ a An included angle from the first position to a first endpoint of the substation equipment; θ b Is the angle from the first location to the second end point of the substation equipment.
In a third aspect, the present disclosure provides a network device security assessment apparatus, including: a processor and a memory; wherein the memory is configured to store computer-executable instructions that, when executed by the resource scheduling device, cause the resource scheduling device to perform a resource scheduling method as described in any one of the possible implementations of the first aspect and the first aspect.
In a fourth aspect, the present disclosure provides a computer readable storage medium having instructions stored therein, which when executed by a processor of a network device security assessment apparatus, enable the network device security assessment apparatus to perform a network device security assessment method as described in any one of the possible implementations of the first aspect and the first aspect.
In a fifth aspect, the present disclosure provides a computer program product comprising instructions which, when run on a network device security assessment apparatus, cause the network device security assessment apparatus to perform a network device security assessment method as described in any one of the possible implementations of the first aspect and the first aspect.
In a sixth aspect, the present disclosure provides a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a computer program or instructions to implement a network device security assessment method as described in any one of the possible implementations of the first aspect and the first aspect.
In particular, the chip provided in the embodiments of the present disclosure further includes a memory for storing a computer program or instructions.
In the present disclosure, the names of the above-described network device security assessment apparatuses do not constitute limitations on the devices or function modules themselves, and in actual implementations, these devices or function modules may appear under other names. Insofar as the function of each device or function module is similar to the present disclosure, it is within the scope of the claims of the present disclosure and the equivalents thereof.
These and other aspects of the disclosure will be more readily apparent from the following description.
The technical scheme provided by the disclosure at least brings the following beneficial effects:
in the scheme, the network equipment safety evaluation device firstly determines the power frequency magnetic field intensity of the substation equipment at a plurality of preset positions, and then determines the power frequency magnetic field intensity at the installation position according to the installation position of the network equipment. After that, the network device safety evaluation device evaluates the safety of the network device when installed at the installation position according to the power frequency magnetic field intensity at the installation position and the safety threshold value. Thus, when the network equipment is installed in the transformer substation, the network equipment safety evaluation device can evaluate the installation position of the power frequency magnetic field intensity meeting the safety requirement from the installation position meeting the condition of the installation position of the network equipment in the transformer substation by the method, and further the network equipment is installed at the installation position of the power frequency magnetic field intensity meeting the safety requirement.
Drawings
Fig. 1 is a schematic hardware structure diagram of a network device security assessment apparatus according to an embodiment of the present disclosure;
fig. 2 is a flow chart of a network device security assessment method according to an embodiment of the present disclosure;
fig. 3 is a flow chart of another method for evaluating security of a network device according to an embodiment of the disclosure;
fig. 4 is a schematic diagram of a simulation model of a transformer substation switching field area according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of magnetic field intensity generated by substation equipment at any point in space according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of a simulation result of a power frequency magnetic field of a transformer substation at a vertical distance of 20 meters according to an embodiment of the present disclosure;
fig. 7 is a flowchart of another network device security assessment method according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a security evaluation apparatus for network devices according to an embodiment of the present disclosure.
Detailed Description
The network device security assessment method, device and storage medium provided by the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.
The terms "first" and "second" and the like in the description and in the drawings of the present disclosure are used for distinguishing between different objects or for distinguishing between different processes of the same object and not for describing a particular sequential order of objects.
Furthermore, references in the description of this disclosure to the terms "comprise" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may optionally include other steps or elements not listed or inherent to such process, method, article, or apparatus.
It should be noted that in the embodiments of the present disclosure, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in the examples of this disclosure should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
Fig. 1 is a schematic structural diagram of a security evaluation apparatus for network devices according to an embodiment of the present disclosure. As shown in fig. 1, the network device security assessment apparatus 100 includes at least one processor 101, a communication line 102, and at least one communication interface 104, and may also include a memory 103. The processor 101, the memory 103, and the communication interface 104 may be connected through a communication line 102.
The processor 101 may be a central processing unit (central processing unit, CPU), or may be an application specific integrated circuit (application specific integrated circuit, ASIC), or one or more integrated circuits configured to implement embodiments of the present disclosure, such as: one or more digital signal processors (digital signal processor, DSP), or one or more field programmable gate arrays (field programmable gate array, FPGA).
Communication line 102 may include a pathway for communicating information between the aforementioned components.
The communication interface 104, for communicating with other devices or communication networks, may use any transceiver-like device, such as ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN), etc.
The memory 103 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc read-only memory (compact disc read-only memory) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to include or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
In a possible design, the memory 103 may exist independent of the processor 101, that is, the memory 103 may be a memory external to the processor 101, where the memory 103 may be connected to the processor 101 through a communication line 102, for storing execution instructions or application program codes, and the execution is controlled by the processor 101, to implement a network device security assessment determination method provided in the following embodiments of the disclosure. In yet another possible design, the memory 103 may be integrated with the processor 101, i.e., the memory 103 may be an internal memory of the processor 101, e.g., the memory 103 may be a cache, and may be used to temporarily store some data and instruction information, etc.
As one implementation, processor 101 may include one or more CPUs, such as CPU0 and CPU1 in fig. 1. As another implementation, the network device security assessment apparatus 100 may include multiple processors, such as the processor 101 and the processor 107 in fig. 1. As yet another implementation, the network device security assessment apparatus 100 may further include an output device 105 and an input device 106.
From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the network node is divided into different functional modules to implement all or part of the functions described above. The specific working processes of the above-described system, module and network node may refer to the corresponding processes in the foregoing method embodiments, which are not described herein.
In the related art, a network device (e.g., a 5G communication network device) is less affected by an electromagnetic environment due to its characteristics of communicating using a high frequency band. However, the network device is generally composed of a large number of electronic components, and the communication function is realized by using a large number of microelectronic technologies, which results in that the network device has high sensitivity to the interference of the strong electromagnetic environment, and when the network device works under the strong electromagnetic environment, the network device can be affected, and even the security of the network device cannot be ensured.
When the network equipment is installed in the transformer substation, a large amount of equipment in the high-voltage system of the transformer substation has large current, so that the high-voltage system of the transformer substation forms a strong interference source, various steady-state or transient interference can be generated during normal operation or failure of the transformer substation, and for example, transient interference can be caused when a certain high-current equipment is subjected to switching operation. In addition, when the substation equipment has short-circuit fault, the substation equipment can increase the nearby electromagnetic field and power frequency potential, and thus the normal operation of the network equipment can be greatly interfered.
The electromagnetic compatibility standard of the network equipment designed at present is not suitable for the complex electromagnetic environment of the transformer substation, so when the network equipment is arranged in the transformer substation, the electromagnetic interference of a high-voltage system of the transformer substation can be possibly caused, the safe operation of the network equipment can be seriously influenced, even the network equipment is damaged, and the communication system cannot be operated safely and reliably. Therefore, how to evaluate the security of the network device in a complex electromagnetic environment such as a transformer substation is a technical problem to be solved.
The electromagnetic environment of the current transformer substation is generally a power frequency electromagnetic field environment, and the influence of the power frequency electromagnetic field on the ground on the human body is researched by the related technology only through a mode of combining simulation and field instrument testing. However, the building height of the network equipment is usually 20-30 m high altitude at present, and the building environment is usually a businessman area, an office area and other environments without strong electromagnetic field interference. The electromagnetic environment in the transformer substation is complex, the internal devices are of various types, the voltage levels in the transformer substation are different, and the surrounding electromagnetic environments of different devices are quite different. However, the research on electromagnetic field calculation of network equipment built in a transformer substation scene is still blank at present.
In order to solve the technical problems in the related art, the present disclosure provides a network device security assessment method, where a network device security assessment device first determines power frequency magnetic field intensities generated by substation devices at a plurality of preset positions, and then determines the power frequency magnetic field intensity at the installation position according to the installation position of the network device. After that, the network device safety evaluation device evaluates the safety of the network device when installed at the installation position according to the power frequency magnetic field intensity at the installation position and the safety threshold value. Thus, when the network equipment is installed in the transformer substation, the network equipment safety evaluation device can evaluate the installation position of the power frequency magnetic field intensity meeting the safety requirement from the installation position meeting the condition of the installation position of the network equipment in the transformer substation by the method, and further the network equipment is installed at the installation position of the power frequency magnetic field intensity meeting the safety requirement.
The network device security assessment method provided by the embodiment of the present disclosure may be applied to the network device security assessment apparatus shown in fig. 1, and as shown in fig. 2, the network device security assessment method provided by the embodiment of the present disclosure may be implemented by the following steps 201 to 204.
Step 201, a network device safety evaluation device determines the power frequency magnetic field intensity generated by substation equipment at a plurality of preset positions.
In a possible implementation manner, the network equipment safety evaluation device acquires parameter information of the substation equipment, determines the magnitude of a current value passing through a current-carrying wire of the substation equipment, and determines the power frequency magnetic field intensity generated by the substation equipment at a plurality of preset positions within a preset range according to the magnitude of the current value passing through the current-carrying wire of the substation equipment.
In order to facilitate accurate comparison and evaluation with the power frequency magnetic field intensity safety threshold value of the network equipment, the network equipment safety evaluation device analyzes and processes the obtained data of the power frequency magnetic field intensity to establish a substation power frequency magnetic field database. After that, the network equipment safety evaluation device determines the power frequency magnetic field intensity generated by the substation equipment at a plurality of preset positions within a preset range according to the substation power frequency magnetic field database.
Specifically, the transformer substation power frequency magnetic field database includes: the type of the transformer substation, the type of the transformer substation equipment, the transformer substation area where the transformer substation equipment is located and the power frequency magnetic field intensity of each point position of the transformer substation equipment in a preset range.
It should be noted that, the network security assessment method (e.g., steps 201 to 204) provided in the embodiments of the present disclosure may be specifically executed by the network device security assessment apparatus shown in fig. 1, which is not described in detail in the present disclosure.
Step 202, the network equipment safety evaluation device determines the relative position information of the installation position of the network equipment and the substation equipment.
Wherein the network device is within the preset range.
In one possible implementation manner, the network device security assessment device determines the installation position of the network device by acquiring the antenna height, the antenna downtilt angle and other information in the specification parameter information of the network device. The specification parameter information of the network equipment comprises: manufacturer information, size, antenna height, antenna downtilt angle, antenna type, etc. of the network device. And determining the relative position information of the network equipment in the transformer substation equipment according to the installation position information of the network equipment.
An example is shown in table 1 as specification parameter information of a network device.
TABLE 1 specification parameter information for network devices
Network equipment manufacturer Manufacturer A
Network device size 44cm*45cm*41cm
Network equipment antenna height 13
Network equipment antenna downtilt angle 6°
Network device antenna type Array antenna
It should be noted that, the relative position information of the installation position of the network device and the substation device is mainly determined by the antenna height and the antenna downtilt angle of the network device, which is not limited by the present disclosure in specific implementation manner.
Step 203, the network equipment safety evaluation device determines the power frequency magnetic field intensity of the installation position according to the power frequency magnetic field intensity generated at a plurality of preset positions and the relative position information.
In a possible implementation manner, the network device safety evaluation device determines the power frequency magnetic field intensity of the substation device at the relative position according to the relative position information of the installation position of the network device and the substation device.
In one example, the network device safety evaluation device extracts a power frequency magnetic field intensity value generated by the substation device at a relative position from a substation power frequency magnetic field database according to relative position information of the installation position of the network device and the substation device.
And 204, the network equipment safety evaluation device evaluates the safety of the network equipment according to the power frequency magnetic field intensity of the installation position and the power frequency magnetic field intensity safety threshold of the network equipment.
In a possible implementation manner, the network equipment safety evaluation device compares the obtained power frequency magnetic field intensity at the installation position of the network equipment relative to the transformer substation equipment with a power frequency magnetic field intensity safety threshold of the network equipment, and evaluates whether the power frequency magnetic field intensity at the installation position meets the safety operation condition of the network equipment.
In one example, the network device security assessment apparatus compares the extracted power frequency magnetic field intensity of the network device at the relative installation position of the substation device with a power frequency magnetic field intensity security threshold of the network device. When the power frequency magnetic field intensity of the relative installation position is smaller than or equal to the power frequency magnetic field intensity safety threshold of the network equipment, the power frequency magnetic field intensity of the relative installation position is estimated to meet the safety operation condition of the network equipment; and when the power frequency magnetic field intensity at the relative installation position is larger than the safe operation threshold value of the power frequency magnetic field intensity of the network equipment, evaluating that the power frequency magnetic field intensity at the installation position does not meet the safe operation condition of the network equipment.
A specific example is a network device as a 5G communication device. The power frequency magnetic field intensity safety threshold of the 5G communication equipment is 3.78ut. When the power frequency magnetic field intensity of the 5G communication equipment at the installation position of the transformer substation is smaller than the safety threshold value of 3.78ut, the network equipment safety evaluation device evaluates that the position of the transformer substation is the safety installation position of the 5G communication equipment. When the power frequency magnetic field intensity of the 5G communication equipment at the installation position of the transformer substation is larger than the safety threshold value of 3.78ut, the network equipment safety evaluation device evaluates that the position of the transformer substation is the unsafe installation position of the 5G communication equipment.
The above-described solution brings at least the following advantageous effects.
The network equipment safety evaluation device firstly determines the power frequency magnetic field intensity of the substation equipment at a plurality of preset positions, and then determines the power frequency magnetic field intensity at the installation position according to the installation position of the network equipment. After that, the network equipment safety evaluation device processes the power frequency magnetic field intensity according to the installation position and compares the power frequency magnetic field intensity with a safety threshold value, and evaluates the safety of the network equipment when the network equipment is installed at the position. Thus, when the network equipment is installed in the transformer substation, the network equipment safety evaluation device can evaluate the installation position of which the power frequency magnetic field intensity meets the safety requirement from the installation position which accords with the installation position condition of the network equipment in the transformer substation by the method, and further the network equipment is installed at the installation position of which the power frequency magnetic field intensity meets the safety requirement.
In connection with fig. 2, as shown in fig. 3, the above-mentioned step 201 may be implemented by one or more of the following steps 301 to 302.
Step 301, the network equipment safety evaluation device determines a current value of the substation equipment according to the parameter information of the substation equipment.
Wherein the parameter information includes: rated power, rated voltage, and power factor angle.
In one possible implementation, the magnitude of the substation device current value is mainly determined by the rated power, the rated voltage and the power factor angle of the substation device. Thus, the network device security assessment apparatus may determine the magnitude of the current value flowing through the substation device from the obtained rated power, rated voltage, and power factor angle of the substation device.
Example, current value i of substation equipment ab The following formula is satisfied1
Wherein i is used ab Representing a current value of the substation equipment; p is rated power of substation equipment; u is the rated voltage of the substation equipment;is the power factor angle of the transformer substation.
Optionally, the current value of the substation equipment is also affected by factors such as the category of the substation site, the voltage class, the number of main transformers, and the main capacity.
In one example, the network device security assessment apparatus determines site information such as a class, a voltage class, a device type, a number of main transformer substation voltage, a main transformer capacity, and the like of the transformer substation, and establishes a substation site information base according to the obtained site information.
Specifically, the categories of the transformer substation can be divided into: a hub transformer substation, a terminal transformer substation, a step-up transformer substation, a step-down transformer substation and the like; the voltage class can be divided into: 550V, 220V, 110V and 35V; the device types can be divided into transformer devices, square opening devices, reactor devices and daily office devices; and counting the number of main transformers and the main transformer capacity according to actual data of the station.
Further, in order to more accurately simulate the power frequency magnetic field intensity within the construction area range of the network equipment, the network equipment safety evaluation device divides the transformer substation into four construction areas according to the type of the transformer substation equipment. Wherein, these four build the region and do not be: transformer area, switchyard area, reactor area, and daily office area.
An example is shown in fig. 4, which is a schematic diagram of a simulation model of a substation switchyard area. When the simulation model is built, the network equipment safety evaluation device regards wires connected among buses, incoming wires, outgoing wires and equipment as cylindrical conductors in order to optimize internal details. Wherein, the wire is a good conductor.
The simulation model does not consider the influence of electric equipment such as a breaker and a lightning protector in a transformer substation on an electromagnetic field.
It is worth noting that different construction areas have different effects on the magnitude of the substation equipment current values. When a transformer substation power frequency magnetic field database is established, the network equipment safety evaluation device can automatically set influence parameters influencing the magnitude of the equipment current value according to the actual construction environments of different construction areas. The actual construction environment is closely related to site information such as the type of a transformer substation where a construction area is located, voltage class and the like. In the process of data processing, the magnitude of the current value of the substation equipment obtained in the formula 1 is automatically converted into the magnitude of the current value when the substation equipment actually operates, and the current value is still used as i ab And (3) representing.
The magnitude of the influencing parameter is not limited in the present disclosure.
Step 302, the network equipment safety evaluation device determines the power frequency magnetic field intensity generated at a plurality of preset positions of the substation equipment according to the current value of the substation equipment.
In a possible implementation manner, the network device security assessment device determines the power frequency magnetic field intensity generated by the substation device at a plurality of preset positions within a preset range according to the current value obtained in step 301 during actual operation of the substation device.
Exemplary, the power frequency magnetic field intensity generated by the substation equipment at a plurality of preset positions within the preset range satisfies the following formula 2
It should be noted that the number of the substrates,the power frequency magnetic field intensity of any position of the substation equipment at a plurality of preset positions is obtained; mu (mu) 0 Is vacuum magnetic permeability; i.e ab The current value of the transformer substation equipment is; r is a plurality ofA distance between any one of the preset positions and the substation equipment; θ a An included angle from any one of a plurality of preset positions to the left end point of the substation equipment; θ b An included angle from any one of a plurality of preset positions to a right end point of the substation equipment.
Specifically, the power frequency magnetic field intensity of the substation equipment at any one of a plurality of preset positions The deduction calculation can be performed according to the law of pioshal. Referring to FIG. 5, the power frequency magnetic field intensity of the transformer substation is +.>Is a derivation of (1):
as shown in FIG. 5, the magnetic field excited by the current element at any position P point in space satisfies the following equation 3
Wherein I is the source current; dl is the line element of the source current; mu (mu) 0 Is vacuum permeability, its value is 4pi×10 -7 H/m；The distance from the current element to the point P is shown; θ is dl and->Is included in the bearing.
Optionally, for any length in space, l AB Is a current-carrying wire segment having a starting point A with a coordinate of (x a 、y a 、z a ) The coordinates of the end point B are (x b 、y b 、z b ) The line segment current is i ab . Referring to fig. 5, as can be seen from equation 3, the magnetic induction generated by the current-carrying wire segment lAB at point P satisfies equation 4
Wherein,a unit vector pointing to the point P for the line element dl; r is the distance from dl to point P.
The network security assessment device combines the formula 3 and the formula 4 to obtain the formula 2 after variable replacement.
The power frequency magnetic field intensity of any one position of the transformer substation equipment at a plurality of preset positionsThe direction of (2) satisfies the following equations 5 and 6
Wherein,and->Vectors between corresponding points respectively; />The unit vectors in x, y, and z, respectively.
In one example, where the network device is typically installed 20-30 meters from the ground, the network device security assessment device simulates the magnetic field strength at the top of the substation device and the power frequency magnetic field strength in the range of 20-30 meters from the ground when determining the strength of the generated power frequency magnetic field of the substation device in the preset range. Wherein, the sky surface refers to the surface on substation equipment top.
When the network equipment safety evaluation device simulates the power frequency magnetic field intensity of the transformer substation, the network equipment safety evaluation device accurately simulates the power frequency magnetic field intensity of the transformer substation according to four building areas divided by the type of the transformer substation equipment. The four divided building areas are respectively: transformer area, switchyard area, reactor area, and daily office area. Specifically, as shown in table 2 below, the simulation results of the power frequency magnetic field intensity of the substation are shown.
Table 2, substation power frequency magnetic field intensity simulation results
Exemplary, as shown in fig. 6, a schematic diagram of a simulation result of a power frequency magnetic field of the transformer substation at a vertical distance of 20 meters is shown.
For better illustration, table 1 only lists the power frequency magnetic field intensity within the range of 20 meters to 30 meters in the preset range, wherein the data in the table is the simulation result of each 1 meter interval within the range of 20 meters to 30 meters. Further, the network device security assessment device classifies the transformer substation according to the category according to the data of the transformer substation site information base in step 301. Wherein, the category of transformer substation includes: junction substation, terminal substation, step-up substation, step-down substation.
Optionally, the network equipment safety evaluation device performs sorting analysis on the obtained substation power frequency magnetic field intensity simulation results according to the category of the substation, and establishes a substation power frequency magnetic field database.
Above, the power frequency magnetic field intensity simulation process generated by the substation equipment in the preset range provided by the embodiment of the disclosure is described in detail.
The overall process of the network device security assessment apparatus for assessing the security of the network device will be described below with reference to fig. 7:
and 701, the network equipment security assessment device determines substation site information and establishes a substation site information base.
The site information of the transformer substation comprises: the type of the transformer substation, the voltage class, the equipment type, the number of the voltage of the main transformer substation, the main transformer capacity and the like.
Step 702, the network equipment safety evaluation device divides a building area according to the equipment type of the transformer substation.
Wherein, the equipment type of transformer substation includes: transformer equipment, square-opening equipment, reactor equipment and daily office equipment.
In a possible implementation manner, the network device security assessment device divides a substation area into: transformer area, switchyard area, reactor area, and daily office area.
And step 703, the network equipment safety evaluation device determines the current value of the substation equipment according to the parameter information of the substation equipment.
The specific implementation manner of step 703 is similar to that of step 301, and reference may be made to step 301 for the specific implementation process, which is not described herein.
Step 704, the network equipment safety evaluation device determines the power frequency magnetic field intensity generated by the substation equipment at a plurality of preset positions according to the current value of the substation equipment.
The specific implementation of step 704 is similar to that of step 302, and reference may be made to step 302 for the specific implementation of this step, which is not repeated here.
Step 705, the network equipment safety evaluation device establishes a power frequency magnetic field database according to the power frequency magnetic field intensity generated by the substation equipment at a plurality of preset positions within a preset range.
In a possible implementation manner, the network device security assessment device performs data processing analysis on the power frequency magnetic field strength in step 704, and establishes a substation power frequency magnetic field database.
Step 706, the network device security assessment device determines relative location information of the installation location of the network device and the substation device.
The specific implementation of step 706 is similar to that of step 202, and the specific implementation of step 202 may be referred to herein, which is not repeated here.
Step 707, the network equipment safety evaluation device determines the power frequency magnetic field intensity of the installation position according to the power frequency magnetic field intensity generated at the plurality of preset positions and the relative position information.
The specific implementation of step 707 is similar to that of step 203, and the specific implementation of step 203 may be referred to, which is not described herein.
Step 708, the network equipment safety evaluation device evaluates the safety of the network equipment according to the power frequency magnetic field intensity of the installation position and the power frequency magnetic field intensity safety threshold of the network equipment.
The specific implementation of step 708 is similar to that of step 204, and reference may be made to step 204 for the specific implementation, which is not repeated here.
Step 709, the network device security assessment apparatus outputs the assessment result.
In one possible implementation manner, the network device security assessment apparatus outputs the security assessment result on the electronic display screen after performing step 708.
In one example, the network device security assessment apparatus outputs the assessment result on an electronic display screen. When the power frequency magnetic field intensity at the installation position of the network equipment is smaller than or equal to the safety threshold value of the network equipment, the network equipment safety evaluation device outputs on the electronic display screen: the power frequency magnetic field intensity of the current position is within the safety threshold range of network equipment, the position is a safety installation position, and the position is marked as the safety installation position in a power frequency magnetic field database; when the power frequency magnetic field intensity at the installation position of the network equipment is larger than the safety threshold value of the network equipment, the network equipment safety evaluation device outputs on the electronic display screen: the present position of the power frequency magnetic field intensity exceeds the safety threshold of the network equipment, the position is a dangerous installation position, and the position is marked as the dangerous installation position in a power frequency magnetic field database.
The device for evaluating the security of the network device and the functions of each device of the device for evaluating the security of the network device according to the embodiments of the present disclosure are described in detail above.
It can be seen that the foregoing description has mainly been presented with respect to a method of providing a technical solution according to an embodiment of the present disclosure. To achieve the above functions, it includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
The embodiment of the disclosure may divide the functional modules of the network device security assessment apparatus according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. Optionally, the division of the modules in the embodiments of the present disclosure is schematic, which is merely a logic function division, and other division manners may be actually implemented.
The embodiment of the disclosure may divide the functional modules of the network device security assessment apparatus according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. Optionally, the division of the modules in the embodiments of the present disclosure is schematic, which is merely a logic function division, and other division manners may be actually implemented.
The embodiment of the disclosure provides a network device security assessment device, which is used for executing a method required to be executed by any device in the data integrity determination system. The network device security assessment apparatus may be a network device security assessment apparatus referred to in the present disclosure, or a module in a network device security assessment apparatus; or a chip in the network device security assessment apparatus, or other apparatuses for performing the network device security assessment determination method, which is not limited in this disclosure.
Fig. 8 is a schematic structural diagram of a security evaluation apparatus for network devices according to an embodiment of the disclosure. The network equipment security assessment device comprises: a first determination unit 801, a second determination unit 802, a third determination unit 803, an evaluation unit 804, and a communication unit 805.
A first determining unit 801, configured to determine power frequency magnetic field intensities generated by substation equipment at a plurality of preset positions within a preset range;
a second determining unit 802, configured to determine relative position information of an installation position of the network device and the substation device; the network equipment is in a preset range;
a third determining unit 803 for determining the power frequency magnetic field intensity of the installation position according to the power frequency magnetic field intensity generated at a plurality of preset positions and the relative position information;
and the evaluation unit 804 is configured to evaluate the security of the network device according to the power frequency magnetic field intensity of the installation location and the power frequency magnetic field intensity security threshold of the network device.
Optionally, the first determining unit 801 is specifically configured to: determining power frequency magnetic field intensity generated by substation equipment at a plurality of preset positions within a preset range, comprising: determining a current value of the substation equipment according to the parameter information of the substation equipment; the parameter information includes: rated power, rated voltage, and power factor angle; and determining the power frequency magnetic field intensity generated by the substation equipment at a plurality of preset positions within a preset range according to the current value of the substation equipment.
Optionally, the first determining unit 801 is specifically configured to: the current value of the substation equipment satisfies the following formula:
Wherein i is ab The current value of the transformer substation equipment is; p is rated power of substation equipment; u is the rated voltage of the equipment;is the power factor angle of the device.
Optionally, the first determining unit 801 is specifically configured to: the power frequency magnetic field intensity generated by the substation equipment at a first position meets the following formula, wherein the first position is any one of a plurality of preset positions:
the transformer substation equipment generates power frequency magnetic field intensity at a first position; mu (mu) 0 Is vacuum magnetic permeability; i.e ab The current value of the transformer substation equipment is; r is the distance between the first position and the substation equipment; θ a An included angle from the first position to the left end point of the transformer substation equipment; θ b Is the angle from the first location to the right end point of the substation equipment.
The embodiment of the disclosure provides a network device security assessment device, which is used for executing a method required to be executed by any device in the data integrity determination system. The network device security assessment apparatus may be a network device security assessment apparatus referred to in the present disclosure, or a module in a network device security assessment apparatus; or a chip in the network device security assessment apparatus, or other apparatuses for performing the network device security assessment determination method, which is not limited in this disclosure.
The present disclosure also provides a computer-readable storage medium having instructions stored therein, which when executed by a computer, perform the steps of the method flow shown in the method embodiments described above.
Embodiments of the present disclosure provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the network device security assessment method in the method embodiments described above.
Embodiments of the present disclosure provide a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being configured to execute a computer program or instructions to implement a network device security assessment method as in the method embodiments described above.
The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: electrical connections having one or more wires, portable computer diskette, hard disk. Random access Memory (Random Access Memory, RAM), read-Only Memory (ROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), registers, hard disk, optical fiber, portable compact disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any other form of computer-readable storage medium suitable for use by a person or persons of skill in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an application specific integrated circuit (Application Specific Integrated Circuit, ASIC). In the disclosed embodiments, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
Since the apparatus, device, computer readable storage medium, and computer program product in the embodiments of the present disclosure may be applied to the above-mentioned method, the technical effects that may be obtained by the apparatus, device, computer readable storage medium, and computer program product may also refer to the above-mentioned method embodiments, and the embodiments of the present disclosure are not repeated herein.
The foregoing is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any changes or substitutions within the technical scope of the disclosure should be covered by the protection scope of the disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims (6)

1. A method for evaluating security of a network device, comprising:
determining the power frequency magnetic field intensity generated by the substation equipment at a plurality of preset positions;
determining relative position information of the installation position of the network equipment and the transformer substation equipment;
determining the power frequency magnetic field intensity of the installation position according to the power frequency magnetic field intensity generated at the preset positions and the relative position information;
evaluating the safety of the network equipment according to the power frequency magnetic field intensity of the installation position and the power frequency magnetic field intensity safety threshold of the network equipment;
The method for determining the power frequency magnetic field intensity generated by the substation equipment at a plurality of preset positions comprises the following steps:
determining a current value of the substation equipment according to the parameter information of the substation equipment; the parameter information includes: rated power, rated voltage, and power factor angle;
determining the power frequency magnetic field intensity generated by the substation equipment at the preset positions according to the current value of the substation equipment and the position information of the preset positions;
parameter information of the substation equipment and a current value of the substation equipment meet the following formula:
wherein i is ab The current value of the transformer substation equipment is; p is the rated power of the substation equipment; u is the rated voltage of the equipment;is the power factor angle of the device.
2. The method of claim 1, wherein the power frequency magnetic field strength generated by the substation equipment at a first location, the first location being any one of the plurality of preset locations, satisfies the following formula:
wherein,the power frequency magnetic field strength generated at the first location for the substation equipment; mu (mu) 0 Is vacuum magnetic permeability; i.e ab The current value of the transformer substation equipment is; r is the distance between the first position and the substation equipment; θ a An included angle from the first position to a first endpoint of the substation equipment; θ b Is the angle from the first location to the second end point of the substation equipment.
3. A network device security assessment apparatus, comprising: the device comprises a first determining unit, a second determining unit, a third determining unit and an evaluating unit;
the first determining unit is used for determining the power frequency magnetic field intensity generated by the substation equipment at a plurality of preset positions;
the second determining unit is used for determining relative position information of the installation position of the network equipment and the transformer substation equipment;
the third determining unit is used for determining the power frequency magnetic field intensity of the installation position according to the power frequency magnetic field intensity generated at the preset positions and the relative position information;
the evaluation unit is used for evaluating the safety of the network equipment according to the power frequency magnetic field intensity of the installation position and the power frequency magnetic field intensity safety threshold of the network equipment;
the first determining unit is specifically configured to:
Determining a current value of the substation equipment according to the parameter information of the substation equipment and the position information of the plurality of preset positions; the parameter information includes: rated power, rated voltage, and power factor angle;
determining the power frequency magnetic field intensity generated by the substation equipment at the preset positions according to the current value of the substation equipment;
parameter information of the substation equipment and a current value of the substation equipment meet the following formula:
wherein i is ab The current value of the transformer substation equipment is; p is the rated power of the substation equipment; u is the rated voltage of the equipment;is the power factor angle of the device.
4. The apparatus of claim 3, wherein the power frequency magnetic field strength generated by the substation equipment at a first location, the first location being any one of the plurality of preset locations, satisfies the following formula:
wherein,at the transformer station equipmentThe power frequency magnetic field intensity generated at the first position; mu (mu) 0 Is vacuum magnetic permeability; i.e ab The current value of the transformer substation equipment is; r is the distance between the first position and the substation equipment; θ a An included angle from the first position to a first endpoint of the substation equipment; θ b Is the angle from the first location to the second end point of the substation equipment.
5. A network device security assessment apparatus, comprising: a processor and a communication interface; the communication interface being coupled to the processor for running a computer program or instructions to implement the network device security assessment method as claimed in any one of claims 1-2.
6. A computer readable storage medium having instructions stored therein, characterized in that when executed by a computer, the computer performs the network device security assessment method of any of the preceding claims 1-2.
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