CN111856609A - Biological alarm device is prevented to transformer substation's cable pit - Google Patents
Biological alarm device is prevented to transformer substation's cable pit Download PDFInfo
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- CN111856609A CN111856609A CN202010719012.5A CN202010719012A CN111856609A CN 111856609 A CN111856609 A CN 111856609A CN 202010719012 A CN202010719012 A CN 202010719012A CN 111856609 A CN111856609 A CN 111856609A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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Abstract
The embodiment of the invention discloses a biological alarm device for a cable trench of a transformer substation, wherein the cable trench comprises a drainage groove and side walls which are arranged oppositely, and the drainage groove is arranged on the side walls of the cable trench; the alarm device includes: the detection module is arranged on the side wall of the cable trench, and a detection area of the detection module covers the drainage groove and is used for detecting whether organisms enter the detection area or not; the detection module is electrically connected with the first signal processing module through a signal transmission line, and the first signal processing module is used for processing detection signals output by the detection module. The problems of large workload, low checking efficiency, high labor cost and the like of manual checking in the existing precautionary measures are solved, whether organisms enter a cable trench can be automatically and timely detected, the detection accuracy is improved, the labor cost is reduced, and the safe and stable operation of power grid equipment is ensured.
Description
Technical Field
The embodiment of the invention relates to a power cable maintenance technology, in particular to a biological-prevention alarm device for a cable trench of a transformer substation.
Background
When the small animals cause the accidents of the transformer substation equipment, for example, the small animals enter a cable trench through a hole to move, and inevitably bite a high-voltage cable and a secondary circuit cable, so that accidents such as protection misoperation or operation rejection, direct-current short circuit grounding and the like are caused, and the safety operation of a power grid is seriously threatened. Because the drainage design of the cable trench is considered to be communicated with the catch basin, the inlet and the outlet of the cable trench are difficult to be 100 percent tight. With the rapid development of the power grid, the number of lines of the transformer substation is increasing, and therefore, it is particularly important to prevent small animals from entering the cable trench to damage the cable.
At present, the conventional prevention measure is to manually check the plugging, however, the checking plugging needs to pry the cover plate one by one to check section by section, the workload is large, the checking efficiency is low, and a large amount of time and energy are wasted.
Disclosure of Invention
The invention provides a biological-prevention alarm device for a cable trench of a transformer substation, which can automatically detect whether organisms enter the cable trench in real time, improve the detection accuracy, reduce the labor cost and ensure the safe and stable operation of power grid equipment.
The embodiment of the invention provides a biological-prevention alarm device for a cable trench of a transformer substation, wherein the cable trench comprises a drainage groove and side walls which are arranged oppositely, and the drainage groove is arranged on the side walls of the cable trench; the alarm device includes: the detection module is arranged on the side wall of the cable trench, and a detection area of the detection module covers the drainage groove and is used for detecting whether organisms enter the detection area or not; the detection module is electrically connected with the first signal processing module through a signal transmission line, and the first signal processing module is used for processing the detection signal output by the detection module.
Optionally, the detection module comprises at least one first infrared detector, and the cable trench comprises at least one drainage groove; the number of the first infrared detectors is at least equal to that of the drainage grooves.
Optionally, the detection module further includes at least one second infrared detector, and the second infrared detector is electrically connected to the first signal processing module through a signal transmission line.
Optionally, the alarm device further includes a display module, the display module is electrically connected to the first signal processing module, and the display module is configured to display the detection signal processed by the first signal processing module.
Optionally, the detection module includes an optical lens, a temperature detection unit, a second signal processing module and a driving unit, the optical lens is connected to the temperature detection unit, the temperature detection unit is electrically connected to the second signal processing module, and the second signal processing module is electrically connected to the driving unit;
the temperature detection unit is used for detecting a temperature signal of the detection area, and the second signal processing module is used for amplifying the temperature signal detected by the temperature detection unit and outputting the temperature signal to the driving unit.
Optionally, the second signal processing module includes an amplifier and a signal processing unit, the amplifier is electrically connected to the temperature detection unit, the amplifier is electrically connected to the signal processing unit, and the signal processing unit is electrically connected to the driving unit.
Optionally, the detection module further comprises an alarm unit, and the alarm unit is electrically connected with the driving unit.
Optionally, the detection module further includes a voltage-stabilized power supply, the voltage-stabilized power supply is electrically connected to the second signal processing module and the driving unit, and the voltage-stabilized power supply supplies power to the second signal processing module and the driving unit.
Optionally, the detection module further includes a temperature compensation unit, and the temperature compensation unit is electrically connected to the second signal processing module and the regulated power supply respectively.
Optionally, the temperature compensation unit is a thermistor.
The invention provides a biological-prevention alarm device for a cable trench of a transformer substation, wherein the cable trench comprises a drainage groove and oppositely arranged side walls, and the drainage groove is arranged on the side walls of the cable trench; the alarm device includes: the detection module is arranged on the side wall of the cable trench, and a detection area of the detection module covers the drainage groove and is used for detecting whether organisms enter the detection area or not; the detection module is electrically connected with the first signal processing module through a signal transmission line, and the first signal processing module is used for processing detection signals output by the detection module. The problems that manual inspection workload is large, inspection efficiency is low, labor cost is high and the like in the existing precautionary measures are solved, whether organisms enter a cable trench can be automatically detected in real time or not is achieved, detection accuracy is improved, labor cost is reduced, and safe and stable operation of power grid equipment is guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a transformer substation cable trench anti-biological alarm device in a first embodiment of the invention;
fig. 2 is a schematic structural diagram of a transformer substation cable trench anti-biological alarm device in a second embodiment of the invention;
fig. 3 is a block diagram of a structure of a transformer substation cable trench anti-biological alarm device in a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic structural view of a transformer substation cable trench anti-biological alarm device provided in an embodiment of the present invention, and referring to fig. 1, a cable trench 1 includes a drainage channel 2, a side wall 3, and a side wall 3 disposed opposite to the drainage channel 2, where the side wall 3 of the cable trench 1 is provided; this biological alarm device is prevented to transformer substation's cable pit includes: the detection device comprises a detection module 100 and a first signal processing module 200, wherein the detection module 100 is arranged on the oppositely arranged side wall 3 of the cable trench 1, the detection module 100 is fixed on the oppositely arranged side wall 3 of the cable trench 1 through a fixing bolt 4, and a detection area of the detection module 100 covers the drainage channel 1 and is used for detecting whether organisms enter the detection area; the detection module 100 is electrically connected to the first signal processing module 200 through a signal transmission line, and the first signal processing module 200 is configured to process a detection signal output by the detection module 100.
The first signal processing module 200 may be a signal processor, for example, an H-series digital signal processor, and has a simple structure, a fast processing speed, and a high processing efficiency. Wherein the organism can be homothermal organism such as mouse.
In the technical scheme of this embodiment, this biological alarm device is prevented to transformer substation's cable pit's realization process does: referring to fig. 1, the cable trench 1 includes a drainage groove 2 and a sidewall 3 disposed opposite to the drainage groove 2, the detection module 100 is fixedly mounted on the sidewall 3 by a fixing bolt 4, and the detection module 100 is electrically connected to the first signal processing module 200 by a signal transmission line. The detection area of the detection module 100 covers the drainage channel 2, the detection module 100 detects whether a living being enters the drainage channel 2 in real time, sends a detection signal to the first signal processing module 200, and the first signal processing module 200 processes the detection signal. For example, when a living being enters the area of the drainage channel 2, the detection module 100 sends the detection signal to the first signal processing module 200, and the first signal processing module 200 processes the detection signal into text information such as "living being enters in the cable trench", "living being intrudes" and the like, so that the background manager can observe the prompt information. Therefore, whether the organisms enter the cable trench is detected in real time through the detection module 100, relevant management personnel are prompted to perform corresponding processing when the organisms enter the cable trench, the problems that existing precautionary measures are large in workload of manual inspection, low in inspection efficiency, high in labor cost and the like can be solved, whether the organisms enter the cable trench can be detected automatically and in real time are solved, the detection accuracy is improved, the labor cost is reduced, and the safe and stable operation of power grid equipment is guaranteed.
According to the technical scheme, the biological alarm device for the cable trench of the transformer substation is provided, the cable trench comprises a drainage groove and side walls which are arranged oppositely, and the drainage groove is arranged on the side walls of the cable trench; the alarm device includes: the detection module is arranged on the side wall of the cable trench, and a detection area of the detection module covers the drainage groove and is used for detecting whether organisms enter the detection area or not; the detection module is electrically connected with the first signal processing module through a signal transmission line, and the first signal processing module is used for processing detection signals output by the detection module. The problems of large workload, low checking efficiency, high labor cost and the like of manual checking in the existing precautionary measures are solved, whether organisms enter a cable trench can be automatically and timely detected, the detection accuracy is improved, the labor cost is reduced, and the safe and stable operation of power grid equipment is ensured.
Example two
Fig. 2 is a schematic structural diagram of a substation cable trench anti-biological alarm device provided in a second embodiment of the present invention, and referring to fig. 2, a detection module includes at least one first infrared detector 10, and a cable trench 1 includes at least one drainage channel 2; the number of the first infrared detectors 10 is at least equal to the number of the drainage channels 2.
In this regard, referring to fig. 2 exemplarily, fig. 2 exemplarily shows one first infrared detector 10, and the first infrared detector may further include a plurality of first infrared detectors according to actual needs, and the specific number is not specifically limited herein. First infrared detector 10 accessible fixing bolt 5 fixed mounting is on relative lateral wall 3 that sets up, and 3 first infrared detector 10 of installation on the relative lateral wall that sets up of lateral wall 3 at every water drainage tank 2 place from this can enlarge the detection zone who prevents biological entering cable pit, and increase detection range ensures that the biology that every water drainage tank got into can both be detected to improve the efficiency of preventing and controlling.
Optionally, with continued reference to fig. 2, the detection module further comprises at least one second infrared detector 20, the second infrared detector 20 being electrically connected to the first signal processing module 200 via a signal transmission line.
Wherein each second infrared detector 20 can be fixedly mounted on the side wall of the cable trench which is not opposite to the drainage channel 2 by the fixing bolt 4, for example, the mounting position of the second infrared detector 20 in fig. 2. Therefore, the detection range can be further expanded, and the prevention and control detection efficiency is improved.
Optionally, with reference to fig. 2, the biological alarm device for a cable trench of a transformer substation further includes a display module 5, the display module 5 is electrically connected to the first signal processing module 200, and the display module 5 is configured to display the detection signal processed by the first signal processing module 20.
The display module 5 may be a monitor panel, a display screen, or other display devices. It should be noted that there are a plurality of detection modules 100, each detection module 100 is connected to the first signal processing module 200 through a signal transmission line, and the first signal processing module 200 outputs the detection result of each detection module 100 to the display module 5 for displaying. Each detection module may be numbered so that the detection condition of the detection module with the corresponding number can be directly viewed through the display module 5.
EXAMPLE III
Fig. 3 is a block diagram of a structure of a substation cable trench anti-biological alarm device according to a third embodiment of the present invention, and referring to fig. 3, a detection module includes an optical lens 110, a temperature detection unit 120, a second signal processing module 130, and a driving unit 140, the optical lens 110 is connected to the temperature detection unit 120, the temperature detection unit 120 is electrically connected to the second signal processing module 130, and the second signal processing module 130 is electrically connected to the driving unit 140;
the temperature detecting unit 120 is configured to detect a temperature signal of the detection area, and the second signal processing module 130 is configured to amplify the temperature signal detected by the temperature detecting unit 120 and output the amplified temperature signal to the driving unit 140.
The optical lens 110 may be a fresnel lens, and the temperature detection unit 120 may be a pyroelectric sensor. The working principle of the optical lens 110 and the temperature detection unit 120 is as follows: generally, any object in nature with a temperature above the absolute temperature will produce infrared radiation, and objects of different temperatures will release infrared energy at different wavelengths. In the case of a warm-blooded animal, the temperature is such that there is a certain temperature difference from the surrounding environment. When the thermostatic animal moves, this change in temperature difference is detected by the pyroelectric sensor through the fresnel lens. The temperature detecting unit 120 outputs the detected temperature difference signal to the second signal processing module 130, the second signal processing module 130 processes the signal and outputs the processed signal to the driving unit 140, the driving unit 140 outputs the processed signal to the first signal processing module 200, and the first signal processing module 200 processes the detected signal.
Optionally, with continued reference to fig. 3, the second signal processing module 130 includes an amplifier 131 and a signal processing unit 132, the amplifier 131 is electrically connected to the temperature detecting unit 120, the amplifier 131 is electrically connected to the signal processing unit 132, and the signal processing unit 132 is electrically connected to the driving unit 140.
The amplifier 131 may be an operational amplifier, an integrated operational amplifier, a fiber amplifier, or the like. The signal processing unit 132 may be a signal processor. The amplifier 131 is configured to amplify the signal output by the temperature detection unit 120 and output the amplified signal to the signal processing unit 132, and the signal processing unit 132 processes the signal and outputs the processed signal to the driving unit 140, and the driving unit 140 outputs the processed signal to the first signal processing module 200. In general, the signal output by the temperature detection unit 120 is a relatively weak signal, and the amplifier 131 can amplify the weak signal output by the temperature detection unit, for example, a two-stage operational amplifier of LM324, which has a gain of about 75db and a frequency bandwidth of 0.3 to 7HZ, can amplify the weak signal. The amplifier 131 outputs the amplified signal to the signal processing unit 132, the signal processing unit 132 processes the signal and outputs the processed signal to the driving unit 140, the driving unit 140 outputs the processed signal to the first signal processing module 200, and the first signal processing module 200 processes the detection signal.
Optionally, with continued reference to fig. 3, the detection module further comprises an alarm unit 150, the alarm unit 150 being electrically connected to the driving unit 140.
The alarm unit 150 may be an audible and visual alarm sensor. When the temperature detection unit 120 detects that a living being enters the detection area, the driving unit 140 drives the alarm unit 150 to send out an alarm signal to drive the living being entering the detection area and prompt the relevant person to perform corresponding processing. The alarm unit 150 may send an alarm signal to the relevant person in real time to prompt the relevant person, so as to ensure safe and stable operation of the power grid equipment.
Optionally, the detection module further includes a voltage-stabilized power supply 160, the voltage-stabilized power supply 160 is electrically connected to the second signal processing module 130 and the driving unit 140, respectively, and the voltage-stabilized power supply 160 supplies power to the second signal processing module 130 and the driving unit 140.
The regulated power supply 160 may be a BAW05 regulated power supply, which can improve the anti-interference capability and achieve the purpose of low voltage difference and micro power consumption. The voltage regulator 160 may provide an operating voltage to the second signal processing module 130 and may provide a driving voltage to the driving unit 140.
Optionally, the detection module further includes a temperature compensation unit 170, and the temperature compensation unit 170 is electrically connected to the second signal processing module 130 and the regulated power supply 160, respectively.
The temperature compensation unit 170 may be electrically connected to the amplifier 131, and the regulated power supply 160 may provide a supply voltage for the temperature compensation unit. Generally, because high-voltage cable dispels the heat fast, cause the ambient temperature in the cable pit to take place periodic variation easily, therefore alarm device's sensitivity also can be in inverse proportion relation along with ambient temperature's change, and its detectivity is high when ambient temperature is lower promptly, and its detectivity is low when ambient temperature is high, and in order to improve alarm device's sensitivity and stability that detects, carry out automatic compensation to the ambient temperature who changes through temperature compensation unit 170 to improve the stability of surveying.
Optionally, the temperature compensation unit 170 is a thermistor.
Wherein the thermistor is connected between the amplifier 131 and the regulated power supply. The temperature detecting unit 120 outputs a voltage signal and outputs the voltage signal to the second signal processing module 130 only when detecting that the temperature of the detection area changes, that is, when no living being intrudes into the detection area, the environmental temperature of the detection area can be regarded as constant, when the living being intrudes into the detection area, because the temperature of the living being is different from the environmental temperature of the detection area, there is a certain temperature difference, and at this time, the temperature detecting unit 120 outputs the voltage signal. However, the ambient temperature in the detection area changes according to the change of the climate and the like, and in order to allow the temperature detection unit 120 to detect the temperature change when the living organism intrudes into the detection area by having a temperature difference between the ambient temperature and the temperature of the living organism, the temperature compensation unit 170 compensates the change of the ambient temperature in the detection area to generate a temperature difference between the ambient temperature in the detection area and the temperature of the living organism. The temperature of the living body can be generally measured and set by a program. The temperature compensation unit 170 functions to: when the ambient temperature of the detection region is relatively low (e.g., lower than the temperature of the living being), once a living being enters the detection region, the temperature detection unit 120 can detect a strong detection signal when the temperature difference between the temperature of the living being and the ambient temperature is large, and the compensation function of the temperature compensation unit 170 is not required. When the difference between the ambient temperature of the detection area and the temperature of the living being entering the detection area is small, the detection signal detected by the temperature detection unit 120 is weak, and the amplifier 131 is compensated by the temperature compensation unit 170 to have a certain gain, so that the ambient temperature of the detection area and the temperature of the living being maintain a certain temperature difference, and therefore, the temperature detection unit 120 can detect the change of the temperature of the detection area when the living being intrudes into the detection area, and the intrusion of the living being into the detection area is detected.
In the technical scheme of this embodiment, this biological alarm device is prevented to transformer substation's cable pit's realization process does: referring to fig. 1 and 3, the cable trench 1 includes a drainage groove 2 and a sidewall 3 opposite to the drainage groove 2, the detection module 100 is fixedly mounted on the sidewall 3 by a fixing bolt 4, and the detection module 100 is electrically connected to the first signal processing module 200 by a signal transmission line. The detection module 100 comprises an optical lens 110, a temperature detection unit 120, an amplifier 131, a signal processing unit 132, a driving unit 140, an alarm unit 150, a voltage-stabilized power supply 160 and a temperature compensation unit 170, wherein the optical lens 110 and the temperature detection unit 120 detect temperature signals of a detection area in real time, and under a normal condition, when no living beings enter the detection area, the temperature detection unit does not output voltage signals; when a living being enters the detection area, the temperature of the living being is different from the ambient temperature of the detection area, and a certain temperature difference exists, at this time, the temperature detection unit 120 outputs a voltage signal, the voltage signal is amplified by the amplifier 131 and then output to the signal processing unit 132, the voltage signal is processed by the signal processing unit 132 and then output to the driving unit 140, the driving unit 140 drives the alarm unit 150 to alarm, and outputs the signal to the first signal processing module 200, and the first signal processing module 200 processes the detection signal. For example, when a living being enters the detection area, the detection module 100 sends the detection signal to the first signal processing module 200, and the first signal processing module 200 processes the detection signal into text information such as "living being enters in the cable duct" and "living being intrudes" so that the background manager can observe the prompt information. Therefore, whether the organisms enter the cable trench is detected in real time through the detection module 100, relevant management personnel are prompted to perform corresponding processing when the organisms enter the cable trench, the problems that existing precautionary measures are large in workload of manual inspection, low in inspection efficiency, high in labor cost and the like can be solved, whether the organisms enter the cable trench can be detected automatically and in real time are solved, the detection accuracy is improved, the labor cost is reduced, and the safe and stable operation of power grid equipment is guaranteed.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A biological alarm device is prevented in a cable trench of a transformer substation, wherein the cable trench comprises a drainage groove and oppositely arranged side walls, and the drainage groove is arranged on the side walls of the cable trench; characterized in that, the alarm device includes: the detection module is arranged on the side wall of the cable trench, and a detection area of the detection module covers the drainage groove and is used for detecting whether organisms enter the detection area or not; the detection module is electrically connected with the first signal processing module through a signal transmission line, and the first signal processing module is used for processing the detection signal output by the detection module.
2. The substation raceway anti-biological alarm device of claim 1, wherein the detection module comprises at least one first infrared detector, the raceway comprising at least one of the drainage channels; the number of the first infrared detectors is at least equal to that of the drainage grooves.
3. The substation cable trench anti-biological alarm device of claim 2, wherein the detection module further comprises at least one second infrared detector electrically connected to the first signal processing module via a signal transmission line.
4. The biological alarm device is prevented to transformer substation cable pit of claim 1, characterized in that, still includes the display module, the display module is connected with first signal processing module electricity, the display module is used for showing the detected signal after first signal processing module handles.
5. The substation cable trench anti-biological alarm device according to claim 1, wherein the detection module comprises an optical lens, a temperature detection unit, a second signal processing module and a driving unit, the optical lens is connected with the temperature detection unit, the temperature detection unit is electrically connected with the second signal processing module, and the second signal processing module is electrically connected with the driving unit;
the temperature detection unit is used for detecting a temperature signal of the detection area, and the second signal processing module is used for amplifying the temperature signal detected by the temperature detection unit and outputting the temperature signal to the driving unit.
6. The substation cable trench anti-biological alarm device of claim 5, wherein the second signal processing module comprises an amplifier and a signal processing unit, the amplifier is electrically connected with the temperature detection unit, the amplifier is electrically connected with the signal processing unit, and the signal processing unit is electrically connected with the driving unit.
7. The substation cable trench anti-biological alarm device of claim 5, wherein the detection module further comprises an alarm unit electrically connected to the drive unit.
8. The substation cable trench anti-biological alarm device of claim 5, wherein the detection module further comprises a regulated power supply, the regulated power supply is electrically connected with the second signal processing module and the driving unit respectively, and the regulated power supply supplies power to the second signal processing module and the driving unit.
9. The substation cable trench anti-biological alarm device of claim 8, wherein the detection module further comprises a temperature compensation unit, and the temperature compensation unit is electrically connected with the second signal processing module and the regulated power supply respectively.
10. The substation cable trench anti-biological alarm device of claim 9, wherein the temperature compensation unit is a thermistor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010719012.5A CN111856609A (en) | 2020-07-23 | 2020-07-23 | Biological alarm device is prevented to transformer substation's cable pit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010719012.5A CN111856609A (en) | 2020-07-23 | 2020-07-23 | Biological alarm device is prevented to transformer substation's cable pit |
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| CN202268041U (en) * | 2011-11-01 | 2012-06-06 | 金华电业局 | Anti-animal alarm device for power distribution |
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| CN204990575U (en) * | 2015-08-09 | 2016-01-20 | 国家电网公司 | A automatic monitoring alarm device for transformer substation's prevention toy |
| CN105809867A (en) * | 2016-05-31 | 2016-07-27 | 国家电网公司 | Small animal invasion warning system for cable channels |
| CN106020061A (en) * | 2016-07-22 | 2016-10-12 | 国网河南禹州市供电公司 | Substation cable trench monitoring and alarming system |
| CN209230668U (en) * | 2018-12-13 | 2019-08-09 | 国网安徽省电力有限公司合肥供电公司 | A kind of cable duct of substation comprehensive monitoring warning device |
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2020
- 2020-07-23 CN CN202010719012.5A patent/CN111856609A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202268041U (en) * | 2011-11-01 | 2012-06-06 | 金华电业局 | Anti-animal alarm device for power distribution |
| CN105006086A (en) * | 2015-06-12 | 2015-10-28 | 国网上海市电力公司 | Alarm system and method for preventing small animals from intruding into transformer station |
| CN204990575U (en) * | 2015-08-09 | 2016-01-20 | 国家电网公司 | A automatic monitoring alarm device for transformer substation's prevention toy |
| CN105809867A (en) * | 2016-05-31 | 2016-07-27 | 国家电网公司 | Small animal invasion warning system for cable channels |
| CN106020061A (en) * | 2016-07-22 | 2016-10-12 | 国网河南禹州市供电公司 | Substation cable trench monitoring and alarming system |
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