Automatic deicing device for high voltage lines

Abstract

The embodiment of the present invention provides an automatic deicing device for high-voltage lines, belonging to the technical field of deicing of high-voltage lines. The automatic deicing device includes: an image acquisition device, arranged near the high-voltage line, for acquiring image information of the high-voltage line; a high-current output device, arranged at one end of the high-voltage line, for inputting a high current into the high-voltage line when connected to the high-voltage line; a switching switch, respectively connected to one end of the high-voltage line, the high-current output device, and the front line of the high-voltage line; a controller, connected to the image acquisition device, the high-current output device, and the front line, for controlling the switching switch according to whether the high-voltage line needs deicing.

Description

Technical Field

[0001] The invention relates to the technical field of deicing of high-voltage lines, and in particular to an automatic deicing device for high-voltage lines. Background Art

[0002] High-voltage transmission technology is one of the most commonly used transmission strategies in the electric power sector. Through high-voltage lines, the transmission purpose of minimum line loss can be achieved under the high-voltage, low-current and high-power strategy. Since the high-voltage line is in a high-voltage state, in order to avoid the formation of a capacitor effect with the ground, it needs to be set at a certain height in the air.

[0003] In some areas in the north, due to the influence of severe weather such as snowfall, snow and ice may accumulate on the high-voltage lines, which will increase the lateral tension on the high-voltage lines and may seriously cause problems such as line breakage. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide an automatic deicing device for a high-voltage line, which can automatically de-ice the high-voltage line when the high-voltage line needs to be de-iced.

[0005] In order to achieve the above object, an embodiment of the present invention provides an automatic deicing device for high-voltage lines, the device comprising:

[0006] An image acquisition device is arranged near the high-voltage line and is used to acquire image information of the high-voltage line;

[0007] A high current output device, arranged at one end of the high voltage line, for inputting a high current into the high voltage line when connected to the high voltage line;

[0008] A switching switch is respectively connected to one end of the high-voltage line, the high-current output device, and a front line of the high-voltage line;

[0009] A controller is connected to the image acquisition device, the high current output device, and the front circuit, and is used for:

[0010] Determining whether the high-voltage line needs deicing according to the image information;

[0011] When it is determined that the high-voltage line needs to be de-iced, controlling the switch to connect the high-current output device and the high-voltage line to perform a de-icing operation;

[0012] When it is determined that the high-voltage line does not need to be de-iced, the switch is controlled so that the high-voltage line and the front line remain connected.

[0013] Optionally, judging whether the high-voltage line needs deicing according to the image information specifically includes:

[0014] Using a preset neural network model to identify the area of ​​the high-voltage line in the image information;

[0015] establishing a coordinate system in the image information;

[0016] For two long sides of the region, multiple sampling points are selected respectively;

[0017] Determine the fitting straight lines corresponding to the two long sides according to the sampling points;

[0018] Calculating the distance between the two fitted straight lines;

[0019] Determining the thickness of the high-voltage line according to the distance and the corresponding relationship between the image information and the actual length;

[0020] Determining whether the thickness is greater than or equal to a preset snow warning value;

[0021] When it is determined that the thickness is greater than or equal to the snow accumulation warning value, it is determined that the high-voltage line needs to be de-iced.

[0022] Optionally, determining the fitting straight lines corresponding to the two long sides according to the sampling points specifically includes:

[0023] Determine a first set of fitted straight lines for the first long side;

[0024] Determine a second set of fitted straight lines for the second longest side;

[0025] A straight line is randomly selected from the first set of fitted straight lines and the second set of fitted straight lines respectively,

[0026] Calculate the difference in slopes between two selected lines;

[0027] Determining whether the slope difference is greater than or equal to a preset slope threshold;

[0028] When it is determined that the slope difference is greater than or equal to the slope threshold, randomly selecting a straight line from the first set of fitted straight lines and the second set of fitted straight lines again until it is determined that the slope difference is less than the slope threshold;

[0029] When it is determined that the slope difference is less than the slope threshold, the two selected straight lines are determined to be fitting straight lines corresponding to the first long side and the second long side.

[0030] Optionally, the high-current output device is connected to the front-end circuit, and comprises an AC / DC unit for converting the high-voltage alternating current of the front-end circuit into high-current direct current.

[0031] Optionally, the switch includes:

[0032] A controllable switch, wherein a control end of the controllable switch is connected to a controller, and one end of the controllable switch is externally connected to a +5V voltage, and is used to perform a closing operation when a high level is received;

[0033] a current limiting resistor, one end of which is connected to the other end of the controllable switch, and the other end of which is grounded;

[0034] A relay, wherein a control end of the relay is connected to one end of the current limiting resistor, one end of the relay is connected to the high current output device, and the other end of the relay is connected to the high voltage line.

[0035] Through the above technical solution, the automatic deicing device for high-voltage lines provided by the present invention first collects images of the high-voltage lines through an image acquisition device arranged near the high-voltage lines, and then uses a controller to determine in real time whether the high-voltage lines need deicing, and finally, if deicing is required, controls a high-current output device preset at one end of the high-voltage lines to output a high current to the high-voltage lines, thereby realizing automatic deicing of the high-voltage lines. This replaces the manual deicing method of human construction in the prior art, and improves the operation and maintenance efficiency of the high-voltage lines.

[0036] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0038] Figure 1 is a structural block diagram of an automatic deicing device for high-voltage lines according to an embodiment of the present invention;

[0039] Figure 2 is a flow chart of a method performed by a controller according to one embodiment of the present invention;

[0040] Figure 3 is a flow chart of a method performed by a controller according to one embodiment of the present invention; and

[0041] Figure 4 is a structural block diagram of a switching switch according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0043] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings or are used to describe the relative positional relationships of components in the vertical, perpendicular or gravity direction.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] like Figure 1 FIG. 1 is a block diagram of an automatic deicing device for high voltage lines according to an embodiment of the present invention. Figure 1 In the embodiment, the automatic deicing device may include an image acquisition device 10, a large current output device 20, a switching switch 30 and a controller 40.

[0046] The image acquisition device 10 is arranged near the high-voltage line 50, and is used to acquire image information of the high-voltage line 50. The high-current output device 20 can be arranged at one end of the high-voltage line 50, and is used to input a high current into the high-voltage line 50 when connected to the high-voltage line 50. The switching switch 30 can be connected to one end of the high-voltage line 50, the high-current output device, and the front line of the high-voltage line 50, respectively.

[0047] The controller 40 can be connected to the image acquisition device 10, the high-current output device 20, and the front-end circuit, and is used to determine whether the high-voltage circuit 50 needs to be de-iced based on the image information; when it is determined that the high-voltage circuit 50 needs to be de-iced, the switching switch 30 is controlled to connect the high-current output device 20 and the high-voltage circuit 50 to perform a de-icing operation; when it is determined that the high-voltage circuit 50 does not need to be de-iced, the switching switch 30 is controlled to keep the high-voltage circuit 50 and the front-end circuit 51 connected.

[0048] In this embodiment, when the controller 40 determines that de-icing is not required, the controller 40 controls the switch 30 to keep the high-voltage line 50 and the front line 51 connected, thereby realizing the power transmission operation of the high-voltage line. When it is determined that de-icing is required, the switch 30 can be controlled to connect the high-voltage line 50 with the large current output device 20, so that the large current output device 20 can output a large current to the high-voltage line 50. When a large current flows through the high-voltage line 50, the line itself will generate a large amount of heat, so that the ice on the high-voltage line 50 melts, and finally the purpose of de-icing is achieved.

[0049] In one embodiment of the present invention, the specific method for the controller 40 to determine whether the high-voltage line 50 needs to be de-iced can be in various forms known to those skilled in the art. For example, a conventional neural network model is used to identify whether the surface of the high-voltage line 50 is iced. Although this method can identify whether the high-voltage line 50 is iced to a certain extent, such a neural network requires a large number of preset data sets to be trained, and the neural network needs to be further trained according to the environmental conditions in different seasons and at different times. Such an approach will lead to an increase in product research and development costs, and in the actual implementation process, the reliability of the product is poor and misidentification is prone to occur. Therefore, in one embodiment of the present invention, in view of the technical defects of the above-mentioned conventional method, the controller 40 can be used to perform the following Figure 2 The method shown in Figure 2 In, the method may include:

[0050] In step S10, a preset neural network model is used to identify the area of ​​the high-voltage line in the image information;

[0051] In step S11, a coordinate system is established in the image information;

[0052] In step S12, multiple sampling points are selected for the two long sides of the region respectively;

[0053] In step S13, the fitting straight lines corresponding to the two long sides are determined according to the sampling points;

[0054] In step S14, the distance between two fitted straight lines is calculated;

[0055] In step S15, the thickness of the high-voltage line is determined according to the distance and the corresponding relationship between the image information and the actual length;

[0056] In step S16, it is determined whether the thickness is greater than or equal to a preset snow warning value;

[0057] In step S17, when it is determined that the thickness is greater than or equal to the snow warning value, it is determined that the high-voltage line needs to be de-iced.

[0058] In step S18, when it is determined that the thickness is less than the snow warning value, it is determined that the high-voltage line does not need to be de-iced.

[0059] In such Figure 2 In the method shown, the preset neural network model only needs to identify the area where the high-voltage line is located in the image, and does not need to further identify the state of the high-voltage line, so its training process and number of iterations are greatly reduced. The distance between the two edges of the field determined by steps S12 to S14 is essentially the diameter of the high-voltage line at this time. When the high-voltage line is in an icy state, the diameter of the high-voltage line in the image will obviously increase. Therefore, in step S16, it is possible to determine whether the high-voltage line needs to be de-iced by judging the diameter. Such a method is simpler than the conventional method in the prior art, and is easy to operate, and can be well applied to actual equipment.

[0060] In step S13, since the long side of the area where the high-voltage line is located is often shown as a curve in the image, the corresponding sampling points are naturally shown in a relatively discrete form. Although directly taking the center line of these discrete points can determine the actual location of the long side to a certain extent, it is found through a large number of experiments that this method still has a relatively high error rate. Therefore, in one embodiment of the present invention, step S13 can further include the following: Figure 3 The method shown in Figure 3 In, the method may include:

[0061] In step S20, a first set of fitted straight lines of a first long side is determined;

[0062] In step S21, a second set of fitted straight lines of the second long side is determined;

[0063] In step S22, a straight line is randomly selected from the first set of fitted straight lines and the second set of fitted straight lines respectively.

[0064] In step S23, the slope difference between the two selected straight lines is calculated;

[0065] In step S24, it is determined whether the slope difference is greater than or equal to a preset slope threshold;

[0066] When it is determined that the slope difference is greater than or equal to the slope threshold, a straight line is randomly selected from the first set of fitted straight lines and the second set of fitted straight lines respectively until it is determined that the slope difference is less than the slope threshold;

[0067] In step S25, when it is determined that the slope difference is less than the slope threshold, the two selected straight lines are determined to be fitting straight lines corresponding to the first long side and the second long side.

[0068] In one embodiment of the present invention, Figure 1 As shown, in order to facilitate the power supply of the high-current output device 20, the high-current output device 20 can be connected to the front line 51 (substation or the previous high-voltage line), including an AC / DC unit for converting the high-voltage alternating current of the front line into high-current direct current.

[0069] In one embodiment of the present invention, Figure 4 As shown, the switching switch 30 may include a controllable switch 31, a current limiting resistor 32 and a relay 33. Among them, the control end of the controllable switch 31 can be connected to the controller 40, and one end of the controllable switch 31 can be externally connected to a +5V voltage. The controllable switch 31 is used to perform a closing operation when a high level is received. One end of the current limiting resistor 32 can be connected to the other end of the controllable switch 31, and the other end can be grounded. The control end of the relay 33 can be connected to one end of the current limiting resistor 32. One end of the relay 33 can be connected to a large current output device 20, and the other end of the relay 33 can be connected to a high voltage line 50.

[0070] Through the above technical solution, the automatic deicing device for high-voltage lines provided by the present invention first collects images of the high-voltage lines through an image acquisition device arranged near the high-voltage lines, and then uses a controller to determine in real time whether the high-voltage lines need deicing, and finally, if deicing is required, controls a high-current output device preset at one end of the high-voltage lines to output a high current to the high-voltage lines, thereby realizing automatic deicing of the high-voltage lines. This replaces the manual deicing method of human construction in the prior art, and improves the operation and maintenance efficiency of the high-voltage lines.

[0071] The optional implementation modes of the examples of the present invention are described in detail above in conjunction with the accompanying drawings; however, the implementation modes of the present invention are not limited to the specific details in the above implementation modes; within the technical concept of the implementation modes of the present invention, a variety of simple modifications can be made to the technical solutions of the implementation modes of the present invention, and these simple modifications all belong to the protection scope of the implementation modes of the present invention.

[0072] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0073] Those skilled in the art can understand that all or part of the steps in the above-mentioned implementation method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions to enable a (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each implementation of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0074] In addition, various different embodiments of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. An automatic deicing device for high-voltage lines, characterized in that: The automatic deicing device comprises: An image acquisition device is arranged near the high-voltage line and is used to acquire image information of the high-voltage line; A high current output device, arranged at one end of the high voltage line, for inputting a high current into the high voltage line when connected to the high voltage line; A switching switch is respectively connected to one end of the high-voltage line, the high-current output device, and a front line of the high-voltage line; A controller is connected to the image acquisition device, the high current output device, and the front circuit, and is used for: Determining whether the high-voltage line needs deicing according to the image information; When it is determined that the high-voltage line needs to be de-iced, controlling the switch to connect the high-current output device and the high-voltage line to perform a de-icing operation; When it is determined that the high-voltage line does not need to be de-iced, controlling the switch so that the high-voltage line and the front line remain connected; The determining whether the high-voltage line needs deicing according to the image information specifically includes: Using a preset neural network model to identify the area of ​​the high-voltage line in the image information; establishing a coordinate system in the image information; For two long sides of the region, multiple sampling points are selected respectively; Determine the fitting straight lines corresponding to the two long sides according to the sampling points; Calculating the distance between the two fitted straight lines; Determining the thickness of the high-voltage line according to the distance and the corresponding relationship between the image information and the actual length; Determining whether the thickness is greater than or equal to a preset snow warning value; In the case where it is determined that the thickness is greater than or equal to the snow accumulation warning value, determining that the high-voltage line needs to be de-iced; Determining the fitting straight lines corresponding to the two long sides according to the sampling points specifically includes: Determine a first set of fitted straight lines for a first long side; Determine a second set of fitted straight lines for the second longest side; A straight line is randomly selected from the first set of fitted straight lines and the second set of fitted straight lines respectively, Calculate the difference in slopes between two selected lines; Determining whether the slope difference is greater than or equal to a preset slope threshold; When it is determined that the slope difference is greater than or equal to the slope threshold, randomly selecting a straight line from the first set of fitted straight lines and the second set of fitted straight lines again until it is determined that the slope difference is less than the slope threshold; When it is determined that the slope difference is less than the slope threshold, the two selected straight lines are determined to be fitting straight lines corresponding to the first long side and the second long side.

2. The automatic deicing device according to claim 1, characterized in that: The high-current output device is connected to the front-end circuit, and comprises an AC / DC unit for converting the high-voltage alternating current of the front-end circuit into high-current direct current.

3. The automatic deicing device according to claim 1, characterized in that: The switching switch comprises: A controllable switch, wherein a control end of the controllable switch is connected to a controller, and one end of the controllable switch is externally connected to a +5V voltage, and is used to perform a closing operation when a high level is received; a current limiting resistor, one end of which is connected to the other end of the controllable switch, and the other end of which is grounded; A relay, wherein a control end of the relay is connected to one end of the current limiting resistor, one end of the relay is connected to the high current output device, and the other end of the relay is connected to the high voltage line.

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