Camera arrangement method and system for a substation

Abstract

The application discloses a camera arrangement method and system for a transformer substation, and the method comprises the following steps: acquiring a planar arrangement drawing of all columns of a typical outgoing line interval of the transformer substation; determining different camera arrangement areas according to a camera view range and a shielding condition among three-phase equipment; for three-phase columns in each interval, the range of the determined different camera arrangement areas is calculated according to the planar arrangement drawing; judging whether the range of the different camera arrangement areas has an intersection, if there is an intersection, a camera is arranged at the intersection to realize optimal arrangement of the camera position, and if there is no intersection, a camera is arranged in a specified camera arrangement area. The application is based on field typical interval arrangement, fully considers the relative position relationship among different equipment and the camera view shielding condition, checks the optimal camera arrangement range, and further improves the rationality and economy of camera arrangement of a station end intelligent patrol system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power monitoring, in particular to a camera arrangement method and system for a substation. BACKGROUND

[0002] In order to adapt to the construction goal of a new power system, and perfect the equipment state perception system of a substation, the intelligent inspection technology of a substation based on a video terminal as a main information collection mode has been greatly developed. By arranging a video terminal in a substation, the collection of pictures of the appearance of equipment and the automatic judgment of the state can be realized.

[0003] In order to realize panoramic perception of the state of equipment, including monitoring of the overall appearance damage of equipment, abnormal oil level of oil-filled equipment, and the like, a substation needs to be configured with a large number of cameras. How to reasonably select the arrangement points of the cameras and realize comprehensive coverage of the inspected equipment while reducing the number of camera configurations is of great significance to reducing the investment of the entire intelligent inspection system transformation project.

[0004] At present, how to select and arrange a video terminal depends on manual experience, and there is a large difference between different personnel. In some plants and stations, the selection and arrangement of cameras are improper, resulting in insufficient coverage of the inspection points due to obstruction, or one camera is arranged at each inspection point, causing waste of configuration. Some manufacturers have proposed an automatic configuration scheme of cameras based on 3D modeling of a substation, which can realize automatic configuration of camera arrangement points. However, the prerequisite is to complete 3D scanning modeling of the entire station, which has a high cost and is not suitable for promotion.

[0005] In related documents and patents, Shang Fei et al. proposed a research on camera arrangement optimization based on water plant monitoring (Shang Fei. Research on camera arrangement optimization based on water plant monitoring [J] Urban Water Supply, 2024, 04 (021): 89-98.), taking a water supply plant as an example, the optimal arrangement of monitoring cameras was converted into a minimum subset cover problem, and a particle swarm optimization algorithm was used to solve it, so as to obtain the optimal camera arrangement scheme of the plant area. The analysis object is a water plant, which is different from the scene of a substation.

[0006] In addition, the patent application with the publication number CN116865438A discloses a method and device for on-site arrangement of cameras of a substation intelligent inspection system, establishes a three-dimensional coordinate system for a substation, and according to the coordinates of the camera arrangement area and the observation points to be observed, the camera coverage range is evaluated according to the height, elevation angle, depression angle and arrangement range area of the camera, and the minimum number of camera arrangements is set as the optimal target to realize automatic arrangement of the camera points. However, this scheme only mentions the visible range of the camera and the distance of the target point, and does not consider the equipment obstruction. In actual application, the equipment obstruction should also be considered, and it is only suitable for scenes where the equipment is not obstructed.

[0007] In summary, the current research lacks the consideration of the intelligent patrol system camera point distribution configuration scheme under the shielding condition of substation equipment, and it is difficult to truly adapt to the point distribution design on site. SUMMARY

[0008] The technical problem solved by the present application is to provide a camera arrangement method and system for a substation, based on the typical interval arrangement on site, fully considering the relative position relationship between different equipment and the camera view shielding condition, checking the optimal camera point distribution range, and further improving the rationality and economy of the substation intelligent patrol system camera point distribution.

[0009] To solve the above technical problems, the technical scheme adopted by the present application is:

[0010] A camera arrangement method for a substation, comprising the following steps:

[0011] Obtaining the planar arrangement diagram of all columns of a typical outgoing line interval of a substation;

[0012] Determining different camera arrangement areas according to the camera view range and the shielding condition between three-phase equipment, and calculating the range of the determined different camera arrangement areas according to the planar arrangement diagram for the three-phase columns in each interval;

[0013] Judging whether the ranges of the different camera arrangement areas have intersections, if there are intersections, arranging cameras at the intersections to realize the optimal arrangement of the camera positions, and if there are no intersections, arranging cameras in the specified camera arrangement areas.

[0014] Further, when determining different camera arrangement areas according to the camera view range and the shielding condition between three-phase equipment, the different camera arrangement areas include:

[0015] A camera arrangement area AREA1 capable of simultaneously observing the A, B phase current transformers and the A, B phase arresters;

[0016] A camera arrangement area AREA2 capable of simultaneously observing the B, C phase current transformers and the C phase arresters;

[0017] A camera arrangement area AREA3 capable of simultaneously observing the A phase current transformer and the C phase arrester of the adjacent interval.

[0018] Further, when arranging cameras in the specified camera arrangement areas, the specified camera arrangement areas specifically refer to the camera arrangement area AREA1 and the camera arrangement area AREA2.

[0019] Further, when the range of the different camera arrangement areas is determined according to the plan layout, the range expression of the camera arrangement area AREA1 is as follows, taking the column of the B-phase current transformer in the current interval as the origin:

[0020] y2 < y < y1

[0021]

[0022]

[0023]

[0024] wherein x and y respectively represent the horizontal coordinate and the vertical coordinate of the camera arrangement point in the camera arrangement area AREA1, D1 is the diameter of the column, a is the distance between the column of the current transformer and the column of the corresponding lightning arrester, and b is the distance between the columns of the lightning arresters of adjacent phases in each interval.

[0025] Further, when the range of the different camera arrangement areas is determined according to the plan layout, the range expression of the camera arrangement area AREA2 is as follows:

[0026] y’ < y3

[0027]

[0028]

[0029] wherein x’ and y’ respectively represent the horizontal coordinate and the vertical coordinate of the camera arrangement point in the camera arrangement area AREA2, D1 is the diameter of the column, a is the distance between the column of the current transformer and the column of the corresponding lightning arrester, b is the distance between the columns of the lightning arresters of adjacent phases in each interval, and c is the distance between the column of the A-phase lightning arrester and the column of the C-phase lightning arrester in the adjacent interval in each interval.

[0030] Further, when the range of the different camera arrangement areas is determined according to the plan layout, the range expression of the camera arrangement area AREA3 is as follows:

[0031] y” > y4

[0032]

[0033]

[0034] wherein x” and y” respectively represent the horizontal coordinate and the vertical coordinate of the camera arrangement point in the camera arrangement area AREA3, D1 is the diameter of the column, a is the distance between the column of the current transformer and the column of the corresponding lightning arrester, and b is the distance between the columns of the lightning arresters of adjacent phases in each interval.

[0035] Further, when judging whether the ranges of different camera arrangement areas exist intersection, comprising:

[0036] If for the same abscissa, y2 < y3 < y1, the camera arrangement area AREA1 and the camera arrangement area AREA2 exist intersection;

[0037] If for the same abscissa, y2 < y4 < y1, the camera arrangement area AREA1 and the camera arrangement area AREA3 exist intersection.

[0038] The application further proposes a camera arrangement system for a transformer substation, comprising a memory, a processor and a computer program stored in the memory, the processor executes the computer program to realize the steps of any one of the camera arrangement methods for the transformer substation.

[0039] The application further proposes a computer readable storage medium, which stores a computer program, the computer program is executed by a processor to realize the steps of any one of the camera arrangement methods for the transformer substation.

[0040] The application further proposes a computer program product, comprising a computer program, the computer program is executed by a processor to realize the steps of any one of the camera arrangement methods for the transformer substation.

[0041] Compared with the prior art, the application has the following advantages:

[0042] After obtaining the planar arrangement diagram of all the columns of the typical outgoing interval of the transformer substation, for the three-phase columns in each interval, the camera arrangement area is calculated according to the planar arrangement diagram by fully considering the camera view range and the shielding condition between the three-phase devices, then whether the different camera arrangement areas exist intersection is judged to check whether there is a camera arrangement area covering the multi-phase device measuring point requirement, so as to determine the camera arrangement position, finally the camera is arranged at the intersection to realize the optimal arrangement of the camera position, and the economy of the construction and transformation of the intelligent patrol system of the transformer substation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 The method flowchart of the embodiment of the application.

[0044] Figure 2 The planar arrangement diagram of the embodiment of the application. DETAILED DESCRIPTION

[0045] The application is further described below in combination with the drawings of the specification and the specific preferred embodiments, but the protection scope of the application is not limited by this.

[0046] Before introducing the specific embodiments of the present application, the related concepts and terms are explained.

[0047] AIS Substation: AIS substation refers to an air-insulated substation. This type of substation uses air as the main insulating medium to isolate and support electrical equipment.

[0048] In an AIS substation, current transformers (CT) and arresters are important components and are usually installed on the column. Among them:

[0049] Current transformers are used for current measurement and protection. They convert high current into low value current for measurement and control equipment use. Current transformers are usually placed near the circuit breaker to accurately detect current when the circuit breaker acts. For a three-phase system, there is usually one current transformer for each phase, installed on the corresponding phase conductor. The arrangement of current transformers needs to ensure that it can cover the protection needs of the system, such as on the line between the circuit breaker and the bus.

[0050] Arresters are used to protect substation equipment from lightning overvoltage damage. They guide overvoltage to the ground by limiting voltage. Arresters are usually installed near transformers, busbars and incoming and outgoing lines to disperse lightning current in time. At the inlet and outlet of the line, the arrester is usually connected with the conductor to protect the entire electrical circuit of the power system. Usually installed on the power side to start protection first when lightning strikes.

[0051] Outgoing bay: In an AIS (air-insulated) substation, the outgoing bay refers to the connection from the busbar of the substation to the power line, which is one of the important components of the substation. The typical outgoing bay arrangement includes the following main equipment and layout:

[0052] Circuit breaker: used to cut off or connect the power line, provide overload and short circuit protection, usually an important part of the outgoing bay, located at the beginning of the line.

[0053] Isolator / Disconnector: used to isolate the power line from the system for maintenance and repair, usually configured on both sides of the circuit breaker.

[0054] Current transformer (CT): used to measure the current in the power line, protect the system and metering equipment, usually installed on the incoming side or outgoing side of the circuit breaker.

[0055] Voltage Transformer (VT): used to measure line voltage, provide signals to protection and metering equipment, installation location can be adjusted according to design needs.

[0056] Surge Arrester: used to protect equipment from lightning overvoltage, usually installed at the incoming line side of the outgoing interval.

[0057] Earthing Switch: used to ground the circuit during maintenance or repair, ensure safety, usually used with disconnecting switch.

[0058] Example 1

[0059] In order to fully optimize the selection of substation camera layout position and improve the efficiency of camera layout, the embodiment proposes a camera layout method for substation, as shown in Figure 1 , including the following steps:

[0060] S1) Obtain the plan layout of all columns of the typical outgoing interval of the substation;

[0061] S2) Determine different camera layout areas according to the camera view range and the shielding condition between three-phase equipment, and for the three-phase columns in each interval, calculate the range of the determined different camera layout areas according to the plan layout;

[0062] S3) Determine whether the range of different camera layout areas has intersection, if there is intersection, arrange the camera at the intersection to realize the optimal arrangement of camera position, if there is no intersection, arrange the camera in the specified camera layout area.

[0063] Through the above steps, when the camera of the substation intelligent patrol system is laid out on site, the relative position relationship between different equipment and the camera view shielding condition are fully considered, the optimal camera layout range is checked, and the rationality and economy of the camera layout of the station end intelligent patrol system are further improved.

[0064] Next, taking a 220kV AIS substation as an example, each step is described.

[0065] In step S1 of the embodiment, a plan layout and dimension annotation as shown in Figure 2 is formed for a typical outgoing interval. The diameter of each equipment column is D1, the longitudinal distance between three-phase surge arresters is b, the distance between the surge arrester column and the current transformer column is a, and the distance between the A-phase surge arrester column and the C-phase surge arrester column of the adjacent interval is c. In this embodiment, a=5m, b=2m, c=3.6m, and D1=0.4m.

[0066] In step S2 of the embodiment, when determining different camera arrangement areas according to the field of view of the camera and the shielding condition among the three-phase devices, the different camera arrangement areas include:

[0067] The camera arrangement area AREA1 can simultaneously observe the A-phase and B-phase current transformers and the A-phase and B-phase arresters;

[0068] The camera arrangement area AREA2 can simultaneously observe the B-phase and C-phase current transformers and the C-phase arrester;

[0069] The camera arrangement area AREA3 can simultaneously observe the A-phase current transformer and the C-phase arrester in the adjacent interval.

[0070] After determining the different camera arrangement areas, in order to determine whether there is an intersection between the areas, in step S2 of the embodiment, the range of the determined different camera arrangement areas is further calculated according to the planar layout diagram, as shown in Figure 2 Taking the column of the B-phase current transformer in the current interval as the origin, the camera arrangement area AREA1 is the area surrounded by the A1 line and the A2 line in Figure 2 , the camera arrangement area AREA2 is the lower part of the area surrounded by the A3 line in Figure 2 , and the camera arrangement area AREA3 is the upper part of the area surrounded by the A4 line in Figure 2 .

[0071] In the embodiment, the equation of the A1 line is: , the equation of the A2 line is: Therefore, the range of the camera arrangement area AREA1 is that, for the horizontal coordinate x, the corresponding vertical coordinates y1 and y2 on the A1 line and the A2 line are respectively calculated in the horizontal coordinate interval from the intersection of the A1 line and the A2 line to the origin, as the upper limit and the lower limit of the vertical coordinate y, and the expression is as follows:

[0072] y2 < y < y1

[0073]

[0074]

[0075]

[0076] wherein x and y respectively represent the horizontal coordinate and the vertical coordinate of the camera arrangement point in the camera arrangement area AREA1.

[0077] In the embodiment, the equation of the A3 line is: Therefore, the range of the camera arrangement area AREA2 is that, for the horizontal coordinate x’, the corresponding vertical coordinate y3 on the A3 line is calculated as the upper limit of the vertical coordinate y’, and the expression is as follows:

[0078] y' < y3

[0079]

[0080]

[0081] wherein x' and y' represent the horizontal coordinate and the vertical coordinate of the camera arrangement point in the camera arrangement area AREA2 respectively.

[0082] In this embodiment, the equation of the A4 line is: Therefore, the range of the camera arrangement area AREA3 is to calculate the corresponding vertical coordinate y4 on the A3 line for the horizontal coordinate x", as the upper limit of the vertical coordinate y", and the expression is as follows:

[0083] y" > y4

[0084]

[0085]

[0086] wherein x" and y" represent the horizontal coordinate and the vertical coordinate of the camera arrangement point in the camera arrangement area AREA3 respectively.

[0087] In step S3 of this embodiment, when judging whether the ranges of different camera arrangement areas exist intersection, it includes:

[0088] S31) judging the size of y3 and y1, y2, if for the same horizontal coordinate y2 < y3 < y1, the camera arrangement area AREA1 and the camera arrangement area AREA2 exist intersection, one camera can be arranged in the intersection area of the camera arrangement area AREA1 and the camera arrangement area AREA2 to realize monitoring of the current transformers and arresters of the same interval A, B, C three-phase, in this embodiment, the intersection area of the camera arrangement area AREA1 and the camera arrangement area AREA2 refers to the area which satisfies the following three conditions simultaneously for the same horizontal coordinate x: y2 < y < y1, y < y3, y2 < y3 < y1;

[0089] S32) Determine the size of y4 and y1, y2, if y2 < y4 < y1 for the same abscissa, the camera arrangement area AREA1 and the camera arrangement area AREA3 exist intersection, can be arranged in the intersection area of the camera arrangement area AREA1 and the camera arrangement area AREA3 One camera to realize the monitoring of the current transformer and lightning arrester of the same interval A, B two phase and adjacent interval C phase, in this embodiment, the intersection area of the camera arrangement area AREA1 and the camera arrangement area AREA3 refers to the area that satisfies the three conditions of y2 < y < y1, y > y4, y2 < y4 < y1 for the same abscissa x at the same time;

[0090] Specifically, since a = 5 meters, b = 2 meters, c = 3.6 meters, D1 = 0.4 meters, the A1 line equation is: y1 = 0.08x1 + 1.8, the A2 line equation is y2 = -0.08x2 + 0.2, the A3 line equation is: y3 = -0.32x3 - 0.2, and the A4 line equation is: y4 = 0.64x4 + 2.2. The intersection point of the A1 line and the A2 line is calculated, and the abscissa is (-10, 1). When x is in the range of -10~0, the values of y1, y2, y3 and y4 are calculated, and the value table is shown in Table 1. When x changes in the range of (-5~-1.7), y2 < y3 < y1 is satisfied, that is, one camera is arranged in the region corresponding to this abscissa interval to realize the monitoring range coverage of the three-phase current transformer and the lightning arrester. When x changes in the range of (-2.7~-0.8), y2 < y4 < y1 is satisfied, that is, one camera is arranged in this region to realize the monitoring range coverage of the current transformer and the lightning arrester of the interval A, B phase and the adjacent interval C phase.

[0091] Table 1 A1~A4 line coordinate value table

[0092]

[0093] S33) If the size of y3 and y1, y2 and the size of y4 and y1, y2 do not satisfy the above conditions, the camera arrangement area AREA1 and the camera arrangement area AREA2, the camera arrangement area AREA3 do not exist intersection, therefore it is impossible to realize the arrangement of one camera to cover more than 2 phase equipment patrol point, only two cameras can be arranged in one interval area to realize the coverage of the patrol point, that is, one camera is arranged in the range of the camera arrangement area AREA1 and the camera arrangement area AREA2, and the corresponding, the specified camera arrangement area in this embodiment is the camera arrangement area AREA1 and the camera arrangement area AREA2.

[0094] It should be noted that since the actual camera arrangement is based on three-dimensional space distribution, the step S3 of the embodiment further includes the following steps:

[0095] Obtain the longitudinal arrangement of all the columns of the typical outgoing interval of the substation;

[0096] Determine different camera arrangement regions according to the field of view of the camera and the shielding condition among the three-phase equipment, and for the three-phase columns in each interval, the range of the determined different camera arrangement regions is calculated according to the longitudinal arrangement.

[0097] Determine whether the ranges of the different camera arrangement regions have intersections, if there are intersections, the intersections are taken as the best range of the camera height coordinates, so that the intersection of the ranges of the different camera arrangement regions calculated according to the planar arrangement and the intersection of the ranges of the different camera arrangement regions calculated according to the longitudinal arrangement are combined to obtain the three-dimensional coordinates of the camera.

[0098] It can be seen that the above steps are basically the same as steps S1 to S3, the difference is only that the analysis object changes from the planar arrangement to the longitudinal arrangement, and the specific implementation steps of the embodiment will not be described again.

[0099] Embodiment Two

[0100] The embodiment also provides a camera arrangement system for a substation, which comprises a memory, a processor and a computer program stored in the memory, and the processor executes the computer program to realize the steps of the camera arrangement method for a substation in the embodiment one.

[0101] The embodiment also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the steps of the camera arrangement method for a substation in the embodiment one.

[0102] The embodiment also provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to realize the steps of the camera arrangement method for a substation in the embodiment one.

[0103] In summary, the application discloses a camera arrangement method and system for a transformer substation, fully considers the sight range of the camera and the shielding condition among three-phase equipment, checks whether there is a camera point arrangement area covering the multi-phase equipment measuring point requirement through the relative position of the sighted equipment, determines the camera point arrangement position, realizes the optimal arrangement of the camera position, improves the economy of the construction and reconstruction of the intelligent patrol system of the transformer substation, compared with the traditional artificial field reconnaissance, generally adopts a configuration scheme of arranging two cameras in an interval, and if the last point arrangement range exists through the checking of the method, one camera per interval can be reduced, the number of saved cameras in the whole station can reach more than ten, and the cost can be effectively saved.

[0104] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical scheme falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as the protection scope of the present application.

Claims

1. A method for arranging cameras in a substation, characterized in that, It includes the following steps: Obtain the floor plan of all columns in a typical outgoing line interval of a substation; Determine different camera arrangement areas according to the viewing range of the camera and the occlusion situation between three-phase equipment. For the three-phase columns in each interval, calculate the ranges of the different camera arrangement areas determined according to the floor plan. When determining different camera arrangement areas according to the viewing range of the camera and the occlusion situation between three-phase equipment, the different camera arrangement areas include: The camera arrangement area AREA1 that can observe the A and B phase current transformers and the A and B phase lightning arresters simultaneously; The camera arrangement area AREA2 that can observe the B and C phase current transformers and the C phase lightning arrester simultaneously; The camera arrangement area AREA3 that can observe the A phase current transformer and the C phase lightning arrester of the adjacent interval; When calculating the ranges of the different camera arrangement areas determined according to the floor plan, taking the column of the B phase current transformer in the current interval as the origin, the range expression of the camera arrangement area AREA1 is as follows: y2 < y < y1 Where, x and y respectively represent the abscissa and ordinate of the camera arrangement point in the camera arrangement area AREA1, D1 is the diameter of the column, a is the distance between the column of the current transformer and the corresponding column of the lightning arrester, and b is the distance between the columns of the lightning arresters of adjacent phases in each interval; When calculating the ranges of the different camera arrangement areas determined according to the floor plan, the range expression of the camera arrangement area AREA2 is as follows: y’ < y3 [[ID= ​ ​ ​ ​ 2. The camera arrangement method for substations according to claim 1, characterized in that, ​ 3. The camera deployment method for substations according to claim 1, characterized in that, ​ ​ If y2 < y4 < y1 for the same abscissa, there is an intersection between the camera arrangement area AREA1 and the camera arrangement area AREA3.

4. A camera deployment system for a substation, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the camera arrangement method for a substation according to any one of claims 1 to 3.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the camera arrangement method for a substation according to any one of claims 1 to 3.

6. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the camera arrangement method for a substation according to any one of claims 1 to 3.

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