CN105809867A - Small animal invasion warning system for cable channels - Google Patents

Abstract

The invention discloses a small animal invasion warning system for cable channels.The small animal invasion warning system is characterized by comprising a switchboard of an operation and maintenance station, main units of transformer substations and monitoring auxiliary units.The small animal invasion warning system has the advantages that small animals can be detected when just starting to appear in the cable channels, information with small animal appearance locations can be transmitted to staffs, accordingly, the staffs can pertinently and timely check the cable channels to block the cable channels without blindly turning over cover plates before destruction is caused by the small animals, and the work efficiency can be greatly improved; the frequencies of routine inspection tour can be reduced by a mode, passive small animal preventive blocking mechanisms are changed into active small animal preventive blocking mechanisms, and accordingly labor burden on the staffs can be relieved.

Description

An early warning system for small animal intrusion in cable trench

technical field

The invention provides an early warning system, in particular to a small animal intrusion early warning system for cable trenches.

Background technique

At present, many substations have been unattended, and only when there are tasks, the staff will go to the substation to perform tasks. In the operation and maintenance operation station management mode, one operation and maintenance operation station manages several substations (substations are generally unattended substations), and the staff work in the centralized office location. Go to the sub station to perform tasks. Many of the power supply and transmission lines of the substation are connected with the outside world through underground cables. In order to ensure a relatively safe environment for the cables, the cables must be placed in cable trenches. A substation can have several cable trenches, and one cable trench can hold several cables.

In autumn and winter, due to the relatively warm places such as substation cable trenches, small animals such as mice like to move in them, which will cause many electrical equipment to be bitten and pose a serious threat to the safe operation of the power grid. At present, many power supply companies have formulated plans for preventing small animals, and incorporate the work of preventing small animals into the daily work management system of substations for management. Substations conduct inspections to prevent small animals from blocking several times a year. Use a stick to pry off the cover of the cable trench, and personnel drill into the cable trench to check whether there are rat holes. If there are, seal the rat holes with fireproof mud and other materials. A cover plate often weighs more than 30 kilograms. In addition, the movable space is limited. During the prying process, it is easy to cause the staff to be pinched, and it is easy to bump when checking in the narrow space of the cable trench. For small animals, substations in some areas use sticky mouse boards, clamps, baffles and other methods to deal with them and have achieved certain results. According to the investigation experience of cable ditch rat holes, when the cable ditch rats first appear, generally there will be no phenomenon of biting the equipment. As time goes by, the rats will gradually damage the equipment.

The invention relates to an early warning system for small animal intrusion in a cable trench, in particular to an early warning system for preventing small animals in a cable trench used in an unattended substation in an operation and maintenance operation station mode.

Contents of the invention

The purpose of the present invention is to provide a small animal intrusion warning system in the cable trench. The system can detect the existence of the small animal in the cable trench when it starts to appear, and then send information with the location of the small animal to the staff, so that the staff can Before small animals cause damage, timely check the above-mentioned cable trenches for sealing, thereby avoiding blindly flipping the cover, which can greatly improve work efficiency. At the same time, this method can reduce the number of routine inspections and make the anti-small animal The blocking mechanism is changed from passive to active, reducing the labor burden of the staff.

A cable ditch small animal intrusion early warning system is characterized in that it is composed of an operation and maintenance station switchboard, a substation host, and a monitoring extension. A monitoring point is established every few meters at the cable ditch of the operation and maintenance station sub-station, and each monitoring point is installed A monitoring extension, each substation is equipped with a substation host and installed in the indoor or outdoor rainproof position of the unattended substation, and the operation and maintenance station switchboard is installed in the office or duty room of the centralized office location. The super-regenerative wireless device is used for communication between the monitoring extension and the substation host, and the 4G network is used for signal transmission between the substation host and the operation and maintenance station switchboard. The monitoring extension is used to send a signal to the substation host of the substation when a small animal is detected, and the substation host is used to receive and summarize the signals of the monitoring extension in the substation and send a signal to the switchboard of the operation and maintenance station, and the switchboard of the operation and maintenance station receives the substations of each substation The host sends a signal and sends out a prompt signal to remind the staff to detect small animals,

The monitoring extension is composed of sub-control units, small animal detection units, and wireless transceiver units. The substation host is composed of main control units and wireless transceiver units. The operation and maintenance station switchboard is composed of general control units, information display units, wireless transceiver unit and sound prompt unit.

When there are small animals, the small animal detection unit of the monitoring extension will detect the existence of small animals and transmit the signal to the sub-control unit. , Discovery time" information (such as the discovery of small animals at 12:00:00 on May 1, 2016 at No. 3 monitoring point of cable ditch No. 1) is sent out through wireless signals. The wireless transceiver unit of the substation host computer receives the wireless signal emitted by the monitoring extension and transmits it to the main control unit for processing, and waits to send the information to the switchboard of the operation and maintenance station. If within a few minutes, other monitoring extensions in the same cable trench do not detect the information of small animals, the main control unit will control the wireless transceiver unit to display "substation name, cable trench name, installation location, discovery time" through the 4G network. " (Small animals were found at 12:00:00 on May 1, 2016 at No. 3 monitoring point of No. 1 cable ditch of Chengbei Substation) and sent to the switchboard of the operation and maintenance station. When other monitoring extensions in the same cable trench detect the existence of small animals within a few minutes, the substation host will receive the information from the monitoring extension with "substation name, cable trench name, installation location, discovery time" (cable trench No. 4 monitoring Click on May 1, 2016 12:00:10 to find small animals) and store them. If no other monitoring extensions in the same cable trench have detected the information of small animals within a few minutes, the main control unit will control the wireless The transceiver unit will summarize the information with "substation name, cable trench name, installation location, discovery time" (Chengbei Substation No. 1 Cable Trench No. 3 and No. 4 monitoring points respectively at 12:00 on May 1, 2016: 00, 12:00:10 found small animals) to the switchboard of the operation and maintenance station through the 4G network. After receiving it, the wireless transceiver unit of the switchboard of the operation and maintenance station transmits it to the general control unit, which controls the information display unit to display the information, and at the same time controls the voice prompt unit to give voice prompts to the staff. At this time, the staff can press The "confirm alarm" button can stop the voice prompt, and the staff can also print the monitoring information by pressing the print button.

Description of drawings

Fig. 1 is a system structure diagram of the present invention.

Fig. 2 is the electrical connection diagram of the present invention.

Among them, Ⅰ is the switchboard, Ⅱ is the host, and Ⅲ is the extension.

Fig. 3 is a schematic diagram of the installation of the detection extension of the present invention.

Among them, 1 is a cable trench, 2 is a cable, 3 is a cable trench cover, 401 is a rainproof cap, 402 is a pipe sleeve, 403 is a monitoring extension box, and 5 is a small animal detection unit.

Fig. 4 is a schematic diagram of the switchboard panel of the operation and maintenance station of the present invention.

detailed description

An early warning system for small animal intrusion in a cable trench, which is composed of an operation and maintenance station switchboard I, a substation host machine II, and a monitoring extension III. A monitoring point is established every few meters at the cable trench of the substation of the operation and maintenance station, and each monitoring point is installed A monitoring extension III, each substation is equipped with a substation host II and installed in the indoor or outdoor rainproof position of the unattended substation, and the operation and maintenance station switchboard is installed in the office or duty room of the centralized office location. The super-regenerative wireless device is used for communication between the monitoring extension III and the substation host II, and the 4G network is used for signal transmission between the substation host II and the switchboard of the operation and maintenance station. The monitoring extension III is used to send signals to the substation host II of the substation when small animals are detected. The signal sent by the substation host II of the substation and a prompt signal remind the staff to detect small animals, and the staff can print the monitoring information by pressing the print button. The system structure is shown in Figure 1.

The monitoring extension III is composed of a sub-control unit, a small animal detection unit, and a wireless transceiver unit. The sub-control unit of the monitoring extension III and the wireless transceiver unit (except the radio frequency antenna) are connected and integrated on the circuit board of the monitoring extension III. The circuit board is placed in the box body 403 of the monitoring extension III. and other processors for information processing, the small animal detection unit uses pyro-infrared sensors as detection elements and is connected to the sub-control unit, and the wireless transceiver unit of the monitoring extension III uses a 315M or 433M super-regenerative wireless module to transmit signals and is connected to the sub-control unit. The radio frequency antenna of the wireless transmission unit is installed under the rainproof cap 401 to avoid wind, sun and rain. At the same time, it is connected to the wireless transceiver unit through the signal transmission line placed in the cavity of the sleeve 402. The small animal detection unit is placed in the monitoring extension III Below the box body 403, as shown in Figure 3, the rainproof cap 401 is placed above the cable trench cover 3 and fixed with a hard sleeve. The rainproof cap 401 should be in an easily identifiable color to ensure signal For wireless transmission, the rainproof cap 401 should be made of ABS engineering plastics, the pipe sleeve 402 passes through the cable trench cover 3, and the lower end of the pipe sleeve 402 on the lower side of the cable trench cover 3 is fixed with a monitoring extension III box body 403, and the monitoring extension The small animal detection unit 5 is fixed below the III box body 403 .

Substation host II is composed of a main control unit and a wireless transceiver unit. The main control unit and wireless transceiver unit of the substation host II are connected and integrated on the circuit board of the substation host II. The control unit uses low-power single-chip microcomputers, ARM and other processors for information processing, and the wireless transceiver unit uses 315M or 433M super-regenerative wireless modules to receive signals from monitoring extension III, and uses 4G network transmission modules to send signals to operation and maintenance station switchboard I .

The operation and maintenance station switchboard Ⅰ is composed of a general control unit, an information display unit, a wireless transceiver unit, a key unit, a printing unit, and a voice prompt unit. It is connected with the main control unit and integrated on the switchboard I circuit board of the operation and maintenance station, and the circuit board is placed in the switchboard I box of the operation and maintenance station. The general control unit of the switchboard I of the operation and maintenance station uses low-power single-chip microcomputers, ARM and other processors for information processing, and the wireless transceiver unit uses a 4G network transmission module to receive signals sent by the substation host II; the sound prompt unit can use voice recording and playback functions The module and the information display unit can adopt industrial LCD such as 12864LCD. The printing unit is connected with the main control unit, and a mature thermal printer can be used to print information. The button unit includes buttons such as "History Record", "Up", "Down", "Confirm", "Cancel", "Delete", "Confirm Alarm", "Mute" and "Print".

The functions of the buttons are as follows:

"History": During normal operation, only the latest small animal alarm information and unconfirmed alarm information are displayed on the screen. Press this button to view historical small animal alarm information.

"Up": View the last message.

"Down": View the next message.

"Confirm": Used to confirm an operation.

"Cancel": used to cancel an operation.

"Delete": used to delete a record.

"Confirm alarm": When there is a small animal alarm sound, press this button to cancel the sound prompt.

"Mute": After pressing this button, when there is a small animal alarm, there will be no sound, but the screen will display.

"Print": After pressing this button, the corresponding alarm information can be printed.

When there are small animals, the small animal detection unit of monitoring extension III will detect the existence of small animals and transmit the signal to the sub-control unit. The location, time of discovery" information (such as the discovery of small animals at 12:00:00 on May 1, 2016 at No. 3 monitoring point of No. 1 cable ditch) was sent out through wireless signals. The wireless transceiver unit of the substation host II receives the wireless signal transmitted by the monitoring extension III and transmits it to the main control unit for processing, and waits to send the information to the switchboard I of the operation and maintenance station. If within a few minutes, other monitoring extensions III in the same cable trench do not detect the presence of small animals, the main control unit will control the wireless transceiver unit to display "substation name, cable trench name, installation location, found Time" information (small animals were found at 12:00:00 on May 1, 2016 at No. 3 monitoring point of Chengbei Substation No. 1 Cable Ditch) to switchboard I of the operation and maintenance station. When other monitoring extensions III in the same cable trench detect the presence of small animals within a few minutes, the substation host II will receive the information from the monitoring extension III with "substation name, cable trench name, installation location, discovery time" (Chengbei Substation Small animals were found at 12:00:10, May 1, 2016 at No. 4 monitoring point of No. 1 Cable Trench) and then stored. If there is no other monitoring extension III in the same cable trench within a few minutes, no small animals are detected. information, the main control unit controls the wireless transceiver unit to summarize the information with "substation name, cable trench name, installation location, discovery time" (the monitoring points of No. 3 and No. 4 cable trenches of Chengbei Substation No. Small animals were found at 12:00:00 and 12:00:10 on May 1) and sent to the switchboard I of the operation and maintenance station through the 4G network. After receiving it, the wireless transceiver unit of the operation and maintenance station switchboard I passes it to the general control unit, which controls the information display unit to display the information, and at the same time controls the voice prompt unit to give voice prompts to the staff. At this time, the staff can press Press the "Acknowledge Alarm" button to stop the voice prompt.

Two examples are used to illustrate the application of the device.

Example 1:

The mouse dug a hole underground and broke through the inner wall of the No. 1 cable trench of Chengbei Substation, and then crawled along the cable trench. When it climbed to the No. 3 monitoring point of the cable trench at 12:00:10, No. 3 monitoring extension III of the No. 1 cable trench detected a Small animals are infested and send information to substation host II. The mouse moves around the No. 3 monitoring point. If no small animal is detected at other monitoring points within a few minutes, substation host II sends information to operation and maintenance station switchboard I, and the operation and maintenance station switchboard Ⅰ will display "Chengbei Substation No. 1 Cable Trench No. 3 Monitoring Point 12:00:00, May 1, 2016 found small animals", at this time, the staff can go to the substation from the centralized office location and flip the No. 1 cable The cover plate near the No. 3 monitoring point in the ditch is checked for traces of small animals, and then holes such as rat holes can be blocked to eliminate potential safety hazards and ensure safe production.

Example 2:

The rats dug holes in the ground and broke through the inner wall of the No. 1 cable trench of the Chengbei Substation, then crawled along the cable trench and passed through No. 3 at 12:00:10, 12:00:15, 12:00:21, and 12:00:28 respectively. Monitoring point, No. 4 monitoring point, No. 5 monitoring point, and climb into another cave between No. 6 monitoring point and No. 7 monitoring point, No. 1 cable trench, No. 3 monitoring extension III, No. 4 monitoring extension III, No. 5 Monitoring extension Ⅲ and No. 6 monitoring extension Ⅲ successively detect small animals and send information to substation main unit Ⅱ. If no small animals are detected at other monitoring points within a few minutes, substation main unit Ⅱ sends information to operation and maintenance station switchboard Ⅰ. The switchboard of the maintenance station will display "The monitoring points of No. 3, No. 4, No. 5, and No. 6 of the cable trench of Chengbei Substation No. 1 were respectively at 12:00:10, 12:00:15, and 12:00 on May 1, 2016: 21. Small animals were found at 12:00:28". At this time, the staff can go to the substation from the centralized office location, and focus on flipping the cover plate between the No. 2 monitoring point and the No. 3 monitoring point of the No. The cover plate between the monitoring point and No. 7 monitoring point is checked for holes such as rat holes to facilitate sealing, so as to eliminate potential safety hazards and ensure safe production.

Claims (1)

1. A cable ditch small animal intrusion early warning system is characterized in that it is composed of an operation and maintenance station switchboard, a substation mainframe, and a monitoring extension. A monitoring point is established every few meters at the cable ditch of the operation and maintenance station sub-station, and each monitoring Each substation is equipped with a substation host and installed in the indoor or outdoor rainproof position of the unattended substation. The switchboard of the operation and maintenance station is installed in the office or duty room of the centralized office location to monitor the extension and the substation. The hosts use super-regenerative wireless devices for communication, and the 4G network is used for signal transmission between the substation host and the operation and maintenance station switchboard. The monitoring extension is used to send signals to the substation host of the substation when small animals are detected, and the substation host is used to receive And summarize the signals of the monitoring extensions in this substation and send signals to the switchboard of the operation and maintenance station. The switchboard of the operation and maintenance station receives the signals sent by the substation hosts of each substation and sends out a reminder signal to remind the staff that small animals have been detected, and the monitoring extension sends signals to the substation host The signal carries the information of "cable trench name, installation location, discovery time", and the signal sent by the substation host to the switchboard of the operation and maintenance station contains the information of "substation name, cable trench name, installation location, discovery time".