Alarm method and system for preventing power cable from being damaged by external force

Abstract

The invention discloses an alarm system for preventing a power cable from being damaged by an external force, and the system comprises at least one group of induction cables which are disposed above the power cable along the line trend of an underground directly-buried power cable, and employs two parallel branches with one ends connected; the field detection alarm device is electrically connected with the other ends of the two branches of the induction cable to form a current induction loop and is used for detecting the level change on the current induction loop, determining that the induction cable is damaged, performing local alarm and sending alarm information to a remote alarm module at a far end; and the power supply device is used for providing electric energy for the field detection alarm device and the induction cable. The invention further discloses a corresponding method. According to the invention, timely monitoring and early warning of external force damage of the cable can be realized, and the method is easy to realize, low in cost and high in accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power safety monitoring, and in particular to an alarm method and system for preventing external force damage to a power cable. Background Art

[0002] As a key component of the power system, the safe operation of power cables is crucial to ensuring the stability and reliability of power supply. However, underground cables are often threatened by external force damage during operation, such as construction excavation, vandalism, etc. These damages may not only cause power outages, but also endanger the safety of construction workers, cause economic losses, and even affect the overall reliability and safe and stable operation of the power grid. In the prior art, although there are methods for monitoring using distributed vibration sensing technology, the cost is relatively high, and it is easily affected by environmental factors, and there are problems of false alarms and missed alarms. Therefore, there is an urgent need for a low-cost, high-reliability, and easy-to-maintain power cable external force damage alarm method and system. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an alarm method and system for preventing external force damage to power cables. By arranging an induction cable in the same direction as the power cable line and combining a main control unit and an alarm unit, timely monitoring and early warning of external force damage to the cable are achieved. The method is easy to implement, low in cost, and high in accuracy.

[0004] In order to solve the above technical problems, as another aspect of the present invention, an alarm system for preventing external force damage to a power cable is provided, which comprises:

[0005] At least one set of induction cables is arranged above the power cable along the route of the underground direct buried power cable, and both use two parallel branches connected at one end;

[0006] An on-site detection alarm device is electrically connected to the other ends of the two branches of the sensed cable to form a current sensing loop, and is used to detect a level change on the current sensing loop, determine that the sensing cable is damaged, issue a local alarm, and send the alarm information to a remote alarm module at a far end;

[0007] A power supply device is used to provide electrical energy to the on-site detection alarm device and the induction cable.

[0008] Optionally, the on-site detection alarm device includes:

[0009] A main control unit is connected to the other ends of the two branches of the sensing cable through an I / O port, and is used to flow a DC power supply into the sensing cable and detect the levels at both ends of the sensing cable. When a jump in the level is detected, it is determined that the sensing cable is damaged and an alarm message is generated; the alarm message includes at least location information and time information;

[0010] On-site alarm module, used to use sound and light alarm to give on-site alarm when the main control unit detects that the induction cable is damaged;

[0011] The communication module is used to send the alarm information from the automatic control unit to the remote end; the alarm information at least includes the location and alarm time of the on-site detection alarm device.

[0012] Optionally, one end of the two branches of the induction cable is connected through a terminal box; the other end of the two branches is connected to the loop of the I / O port of the main control unit, and a connection box is arranged between the terminal box and the I / O port.

[0013] Optionally, it further includes a protective shell arranged on the ground of the protection area, the on-site detection alarm device is arranged inside the protective shell, and the main control unit is connected to the induction cable through a wire threading pipe arranged under the protective shell.

[0014] Optionally, the power supply device is a solar energy supply device, including a solar film panel and a solar cell management module. The solar film panel is connected to a battery through the solar cell management module and is connected to the on-site detection alarm device.

[0015] As another aspect of the present invention, there is also provided an alarm method for preventing external force damage to a power cable, which is implemented by the aforementioned system and comprises the following steps:

[0016] Step S1, arranging an induction cable above the power cable in the same direction as the power cable line, wherein the induction cable has two parallel branches connected at one end and connected to a field detection alarm unit through an I / O port;

[0017] Step S2, when the on-site detection alarm device detects a level change on the current sensing loop, it determines that the sensing cable is damaged, issues a local alarm, and sends the alarm information to a remote alarm module at a far end.

[0018] Optionally, step S2 further comprises:

[0019] The main control unit detects the level information of the sensing cable through the I / O port. When the sensing unit detects that the level on the current sensing loop jumps, it determines that the cable is damaged and generates an alarm message; the alarm message includes at least position information and time information;

[0020] When the main control unit detects that the sensing cable is damaged, the on-site alarm module uses an audible and visual alarm to sound an on-site alarm;

[0021] The alarm information from the main control unit is sent to the remote end through the communication module, and the remote alarm module is used to process the alarm.

[0022] Optionally, further comprising:

[0023] The remote alarm module sends the alarm information to the relevant receiving platform or receiving personnel.

[0024] Optionally, further comprising:

[0025] A solar energy supply device is used to provide power to the main control unit and the induction cable. The solar energy supply device includes a solar film panel and a solar cell management module. The solar cell management module converts solar energy into electrical energy and stores it in a battery.

[0026] The implementation of the embodiments of the present invention has the following beneficial effects:

[0027] The present invention provides an alarm method and system for preventing external force damage to power cables. The method realizes timely monitoring and early warning of external force damage to cables by arranging induction cables that are consistent with the direction of the power cable line and combining a main control unit and an alarm unit. The protection distance is long, and the induction cable length can be greater than 1 kilometer, which meets the needs of large-scale monitoring and can achieve continuous protection.

[0028] The induction method adopted by the present invention is stable and reliable, not affected by environmental factors such as temperature, humidity, external vibration, etc., and has a low false alarm rate. The reaction speed is fast, and once the cable is dug up, the alarm is triggered immediately. At the same time, it is easy to be discovered by the excavator, and the on-site alarm host will not be damaged when it is dug up, ensuring the effectiveness of the alarm system. It has strong maintainability, and the induction cable can be reconnected and buried after being dug up, which does not affect its reuse; it has low cost, simple operation and maintenance, strong practicality, long service life, and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0030] Figure 1 A schematic structural diagram of an embodiment of an alarm system for preventing external force damage to a power cable provided by the present invention;

[0031] Figure 2 It is the system on-site construction layout diagram of the present invention;

[0032] Figure 3 yes Figure 2 Side view of

[0033] Figure 4 A schematic diagram of an embodiment of the present invention for expanding the detection area;

[0034] Figure 5 It is a main process diagram of an embodiment of an alarm method for preventing external force damage to a power cable provided by the present invention. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0037] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0038] like Figure 1 FIG. 1 is a schematic diagram showing a structure of an alarm system for preventing external force damage to a power cable provided by the present invention; and FIG. Figures 2 to 3 As shown, in this embodiment, the alarm system for preventing power cable from being damaged by external force at least includes:

[0039] The induction cable 2 is arranged above the power cable along the line direction of the underground direct-buried power cable, and adopts two parallel branches connected at one end; in a specific example, the induction cable is arranged above the power cable according to the line direction of the underground direct-buried power cable (generally at a position 30cm-50cm above the power cable), and the line direction of the induction cable is consistent with that of the power cable. The induction cable adopts two loops and is connected to the main control unit through the I / O port, and the main control unit is connected to a DC power supply VCC on the induction cable;

[0040] The on-site detection alarm device 1 is electrically connected to the other ends of the two branches of the sensed cable 2 to form a current sensing loop, and is used to determine that the sensing cable is damaged when a level change on the current sensing loop is detected, to make a local alarm, and to send the alarm information to the remote alarm module 3 at the far end; in a specific example, under normal conditions, the I / O port of the main control unit detects a low level. When the cable is damaged and dug, the current sensing loop is cut off, and the DC power supply VCC directly acts on the I / O port to generate a level change (for example, to a high level), so that the on-site detection alarm device 1 is informed that the sensing cable 2 is damaged;

[0041] The power supply device 4 is used to provide electrical energy to the on-site detection alarm device 1 and the induction cable.

[0042] More specifically, in a specific example, the on-site detection alarm device 1 includes:

[0043] The main control unit 10 is connected to the other ends of the two branches of the sensing cable through an I / O port, and is used to flow a DC power supply into the sensing cable and detect the levels at both ends of the sensing cable. When a jump in the level is detected, it is determined that the sensing cable is damaged and an alarm message is generated; the alarm message includes at least location information and time information;

[0044] The on-site alarm module 11 is used to use an audible and visual alarm to issue an on-site alarm when the main control unit detects that the sensing cable 2 is damaged; in a specific example, the alarm duration of the alarm is greater than 1 minute, thereby reminding the construction party to stop excavation.

[0045] The communication module 12 is used to send the alarm information from the main control unit 10 to a remote end; the alarm information at least includes the location and alarm time of the on-site detection alarm device 1.

[0046] In a more specific example, Figure 2 As shown, one end of the two branches of the induction cable 2 is connected through a terminal box; the other end of the two branches is connected to the loop of the I / O port of the main control unit, and a junction box is arranged between the terminal box and the I / O port.

[0047] In a specific example, it also includes a protective shell arranged on the ground of the protection area, the on-site detection alarm device 1 is arranged inside the protective shell, and the main control unit 10 is connected to the induction cable 2 through a threading pipe arranged under the protective shell. In a specific example, the system also includes an installation structure arranged on the ground of the protection area. In this embodiment, the main body of the installation structure is a cement foundation cast on the ground, and a threading pipe that runs through the cement foundation is arranged in the middle. The threading channel is convenient for the threading of the induction cable. A protective shell is arranged above the threading pipe, the main control unit and the remote alarm module are arranged inside the protective shell, and the sound and light alarm is arranged on the protective shell.

[0048] The power supply device 4 is a solar energy supply device, including a solar film panel and a solar cell management module, the solar film panel is connected to the battery through the solar cell management module, and is connected to the on-site detection alarm device 1. The solar film panel is arranged on the top of the protective shell.

[0049] In some examples of the present invention, in one defense zone, the induction cable can be in two groups. Specifically, according to the installation position, it is divided into a left defense zone and a right defense zone, and each defense zone is arranged with a group of induction cables. The positive and negative poles of each group of induction cables are connected to the I / O port of the main control unit through a terminal box. Of course, the left and right defense zones can also be increased to the third, fourth...Nth defense zone according to actual needs by connecting to different I / O ports. The length of each defense zone can also be increased by a junction box to adapt to different application occasions. The junction box and the terminal box have a waterproof function and are sealed with glue after being connected on site.

[0050] The induction cable adopts acid-alkali resistant hydraulic cable, which can be buried directly in the soil. The outgoing and return cables are placed horizontally with a distance of 300-500mm.

[0051] In a specific example, the communication module 12 may be equipped with an Internet of Things card, which sends the alarm content (including the excavation terminal location, excavation defense zone, and excavation time) to the SMS platform via wireless transmission. After receiving the alarm, the SMS platform forwards the alarm content to the mobile phone of the set prevention and control personnel, so as to facilitate the adoption of measures for real-time prevention. In addition, the communication module 2 also supports the function of regularly sending normal working self-checks, so as to facilitate daily real-time monitoring.

[0052] It can be understood that, in the scheme of the present invention, according to the line direction of the underground direct-buried power cable, an induction cable consistent with the line direction of the power cable is arranged above the power cable, the induction cable adopts two loops and is connected to a main control unit through the I / 0 port, and the main control unit is connected to a DC power supply (VCC) on the induction cable. Under normal circumstances, the I / 0 port of the main control unit detects a low level. When the cable is damaged or dug up, the current induction loop is cut off, and the DC power supply (VCC) directly acts on the I / 0 port, resulting in a level change, thereby triggering an alarm.

[0053] like Figure 4 As shown, in an improved embodiment of the present invention, in order to provide a larger coverage area, the detection area is expanded by reserving enough alarm input ports and utilizing the expansion function of the number of induction cables. In this embodiment, a certain distance is extended outward from the central axis of the high-voltage cable as the center, and multiple induction cables are placed in parallel (the middle induction cable is arranged along the central axis of the high-voltage cable), so as to expand the detection area and achieve a more sensitive alarm detection effect. Specifically, in this embodiment, a total of 5 induction cables are placed, each with a spacing of 10 cm, and extended outward by 20 cm along the central axis of the high-voltage cable (that is, the distance between the two outermost induction cables is 40 cm).

[0054] like Figure 5 As shown, a schematic diagram of the main process of an embodiment of an alarm method for preventing external force damage to a power cable provided by the present invention is shown. In this embodiment, the method adopts the above-mentioned Figures 1 to 3 The described system is implemented by comprising the following steps:

[0055] Step S1, arranging an induction cable above the power cable in the same direction as the power cable line, wherein the induction cable has two parallel branches connected at one end and connected to a field detection alarm unit through an I / O port;

[0056] Step S2, when the on-site detection alarm device detects a level change on the current sensing loop, it determines that the sensing cable is damaged, issues a local alarm, and sends the alarm information to a remote alarm module at a far end.

[0057] More specifically, the step S2 further comprises:

[0058] The main control unit detects the level information of the sensing cable through the I / O port. When the sensing unit detects that the level on the current sensing loop jumps, it determines that the cable is damaged and generates an alarm message; the alarm message includes at least position information and time information;

[0059] When the main control unit detects that the sensing cable is damaged, the on-site alarm module uses an audible and visual alarm to sound an on-site alarm;

[0060] The alarm information from the main control unit is sent to the remote end through the communication module, and the remote alarm module is used to process the alarm.

[0061] Optionally, the method provided by the present invention further comprises:

[0062] The remote alarm module sends the alarm information to the relevant receiving platform or receiving personnel.

[0063] Optionally, the method provided by the present invention further comprises:

[0064] A solar energy supply device is used to provide power to the main control unit and the induction cable. The solar energy supply device includes a solar film panel and a solar cell management module. The solar cell management module converts solar energy into electrical energy and stores it in a battery.

[0065] The implementation of the embodiments of the present invention has the following beneficial effects:

[0066] The present invention provides an alarm method and system for preventing external force damage to power cables. The method realizes timely monitoring and early warning of external force damage to cables by arranging induction cables that are consistent with the direction of the power cable line and combining a main control unit and an alarm unit. The protection distance is long, and the induction cable length can be greater than 1 kilometer, which meets the needs of large-scale monitoring and can achieve continuous protection.

[0067] The induction method adopted by the present invention is stable and reliable, not affected by environmental factors such as temperature, humidity, external vibration, etc., and has a low false alarm rate. The reaction speed is fast, and once the cable is dug up, the alarm is triggered immediately. At the same time, it is easy to be discovered by the excavator, and the on-site alarm host will not be damaged when it is dug up, ensuring the effectiveness of the alarm system. It has strong maintainability, and the induction cable can be reconnected and buried after being dug up, which does not affect its reuse; it has low cost, simple operation and maintenance, strong practicality, long service life, and good stability.

[0068] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0069] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0070] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. An alarm system for preventing power cables from being damaged by external forces, characterized in that: include: At least one set of induction cables is arranged above the power cable along the route of the underground direct buried power cable, and both use two parallel branches connected at one end; An on-site detection alarm device is electrically connected to the other ends of the two branches of the sensing cable to form a current sensing loop, and is used to detect a level change on the current sensing loop, determine that the sensing cable is damaged, issue a local alarm, and send the alarm information to a remote alarm module at a far end; A power supply device is used to provide electrical energy to the on-site detection alarm device and the induction cable.

2. The system according to claim 1, characterized in that The on-site detection alarm device comprises: A main control unit is connected to the other ends of the two branches of the sensing cable through an I / O port, and is used to flow a DC power supply into the sensing cable and detect the levels at both ends of the sensing cable. When a jump in the level is detected, it is determined that the sensing cable is damaged and an alarm message is generated; the alarm message includes at least location information and time information; On-site alarm module, used to use sound and light alarm to give on-site alarm when the main control unit detects that the induction cable is damaged; The communication module is used to send the alarm information from the automatic control unit to the remote end; the alarm information at least includes the location and alarm time of the on-site detection alarm device.

3. The system according to claim 2, characterized in that One end of the two branches of the induction cable is connected through a terminal box; the other end of the two branches is connected to the loop of the I / O port of the main control unit, and a connection box is arranged between the terminal box and the I / O port.

4. The system according to claim 3, characterized in that It also includes a protective shell arranged on the ground of the protection area, the on-site detection alarm device is arranged inside the protective shell, and the main control unit is connected to the induction cable through a wire threading pipe arranged under the protective shell.

5. The system according to claim 1, characterized in that The power supply device is a solar energy supply device, including a solar film panel and a solar cell management module. The solar film panel is connected to the battery through the solar cell management module and is connected to the on-site detection alarm device.

6. An alarm method for preventing external force damage to a power cable, implemented by the system according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step S1, arranging an induction cable above the power cable in the same direction as the power cable line, wherein the induction cable has two parallel branches connected at one end and connected to a field detection alarm unit through an I / O port; Step S2, when the on-site detection alarm device detects a level change on the current sensing loop, it determines that the sensing cable is damaged, issues a local alarm, and sends the alarm information to a remote alarm module at a far end.

7. The method according to claim 6, characterized in that The step S2 further comprises: The main control unit detects the level information of the sensing cable through the I / O port. When the sensing unit detects that the level on the current sensing loop jumps, it determines that the cable is damaged and generates an alarm message; the alarm message includes at least position information and time information; When the main control unit detects that the sensing cable is damaged, the on-site alarm module uses an audible and visual alarm to sound an on-site alarm; The alarm information from the main control unit is sent to the remote end through the communication module, and the remote alarm module is used to process the alarm.

8. The method according to claim 7, characterized in that Further including: The remote alarm module sends the alarm information to the relevant receiving platform or receiving personnel.

9. The method according to claim 8, characterized in that Further including: A solar energy supply device is used to provide power to the main control unit and the induction cable. The solar energy supply device includes a solar film panel and a solar cell management module. The solar cell management module converts solar energy into electrical energy and stores it in a battery.

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