CN216485324U - Small current earth fault remote alarm device - Google Patents
Small current earth fault remote alarm device Download PDFInfo
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- CN216485324U CN216485324U CN202122823867.5U CN202122823867U CN216485324U CN 216485324 U CN216485324 U CN 216485324U CN 202122823867 U CN202122823867 U CN 202122823867U CN 216485324 U CN216485324 U CN 216485324U
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- 239000012212 insulator Substances 0.000 claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 238000012423 maintenance Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The utility model discloses a small current ground fault remote alarm device, which comprises a waterproof shell, an alarm controller arranged in the waterproof shell, a signal detection unit connected with the alarm controller, a wireless transmission module connected with the alarm controller, and a current sensor arranged on an insulator string and connected with the signal detection unit, wherein the wireless transmission module is connected with the alarm controller; and a rechargeable battery and a voltage converter are also arranged in the waterproof shell, the rechargeable battery is connected with the voltage converter, and the voltage converter is respectively connected with the alarm controller, the signal detection unit and the wireless transmission module. According to the small-current ground fault remote alarm device, the amplitude of the leakage current of the insulator string is detected in real time through the device, the insulator string insulation fault can be found in time, alarm information is sent in time remotely through the device, so that maintenance personnel can timely and accurately implement anti-pollution flashover measures on the fault insulator string, the maintenance work efficiency can be improved, and the consumption of manpower and material resources is reduced.
Description
Technical Field
The utility model relates to the technical field of power equipment, in particular to a fault alarm device for a power transmission line.
Background
The transmission line is the most important constituent unit in the distribution network, and the insulator is an important component in the transmission line. The insulator working outdoors can face different climatic conditions and geographic environments, and when the insulator is influenced by environments such as dirt, fog, rain, snow and the like, the electrical insulation performance of the insulator can be greatly reduced. When the descending trend reaches the lower limit of the operation requirement of the insulator, flashover accidents occur. Among many factors causing the transmission line fault, the fault caused by the small current flowing through the insulator has the characteristics of high latency and serious harm. According to statistics, in all power distribution network accident types, the number of insulator pollution flashover accidents is the second highest; moreover, the economic loss caused by pollution flashover accidents is far beyond that of other accident types, because the automatic reclosing success rate after pollution flashover is very low, the power failure time is long, and the range is wide.
The protection measure of pollution flashover accidents is generally to regularly clean and adjust the creepage distance of the insulator. The methods can well recover the insulating property of the insulator, but the insulating property of the insulator cannot be fully mastered in specific implementation, so that the methods have blindness when anti-pollution flashover measures such as cleaning the insulator regularly and adjusting the creepage distance of the insulator are implemented, and further the consumption of manpower and material resources is increased.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a low-current ground fault remote alarm device to solve the problem of insulator string insulation fault alarm on a transmission line tower in the prior art.
The utility model discloses a low-current ground fault remote alarm device, which comprises a waterproof shell, an alarm controller, a signal detection unit, a wireless transmission module and a current sensor, wherein the alarm controller is arranged in the waterproof shell;
the low-current ground fault remote alarm device further comprises a rechargeable battery and a voltage converter, wherein the rechargeable battery and the voltage converter are arranged in the waterproof shell, the rechargeable battery is connected with the voltage converter, and the voltage converter is respectively connected with the alarm controller, the signal detection unit and the wireless transmission module.
Furthermore, the low-current ground fault remote alarm device further comprises a solar battery and a photovoltaic controller, wherein the solar battery is respectively connected with the rechargeable battery and the voltage converter through the photovoltaic controller.
Further, the signal detection unit comprises a sensor signal channel, a reference signal channel, a correlator module and a power supply module, wherein the sensor signal channel and the reference signal channel are respectively connected with the correlator module, the power supply module is respectively connected with the sensor signal channel, the reference signal channel and the correlator module, the sensor signal channel is connected with the current sensor, the correlator module is connected with the alarm controller, and the power supply module is connected with the voltage converter.
Further, the solar cell is arranged above the waterproof shell through a support.
The utility model has the beneficial effects that:
1. according to the small-current ground fault remote alarm device, the amplitude of the leakage current of the insulator string is detected in real time through the device, the insulator string insulation fault can be found in time, alarm information is sent in time and remotely through the device, so that maintenance personnel can timely and accurately implement anti-pollution flashover measures on the fault insulator string, the maintenance work efficiency can be improved, and the consumption of manpower and material resources is reduced.
2. According to the low-current ground fault remote alarm device, the photovoltaic module arranged in the low-current ground fault remote alarm device can charge the rechargeable battery in time, and long-term operation of the low-current ground fault remote alarm device can be maintained.
Drawings
Fig. 1 is a schematic structural diagram of an implementation of a low-current ground fault remote alarm device.
Fig. 2 is a schematic diagram of another implementation structure of the low-current ground fault remote alarm device.
Fig. 3 is a schematic block diagram of a low current ground fault remote alarm device.
Detailed Description
The utility model is further described below with reference to the figures and examples.
As shown in the figure, the low-current ground fault remote alarm device of the embodiment comprises a waterproof shell 1, an alarm controller 2 arranged in the waterproof shell, a signal detection unit 3 connected with the alarm controller, a wireless transmission module 4 connected with the alarm controller, and a current sensor 5 arranged on an insulator string 10 and connected with the signal detection unit. Through setting up waterproof housing, can play the guard action, extension device life. The current sensor in this embodiment is a single-turn feedthrough transformer, which is sleeved at the suspension loop of the insulator string when in use, although in different embodiments, other forms of current sensors can also be adopted.
The low-current ground fault remote alarm device further comprises a rechargeable battery 6 and a voltage converter 7, wherein the rechargeable battery 6 and the voltage converter 7 are arranged in the waterproof shell, the rechargeable battery is connected with the voltage converter, and the voltage converter is respectively connected with the alarm controller, the signal detection unit and the wireless transmission module. The voltage converter is used for converting the output voltage of the rechargeable battery so as to meet the voltage requirements of different electrical appliances. The rechargeable battery is preferably a lithium battery in the implementation.
In this embodiment, the signal detection unit 3 includes a sensor signal channel, a reference signal channel, a correlator module, and a power supply module, where the sensor signal channel and the reference signal channel are respectively connected to the correlator module, the power supply module is respectively connected to the sensor signal channel, the reference signal channel, and the correlator module, the sensor signal channel is connected to the current sensor, the correlator module is connected to the alarm controller, and the power supply module is connected to the voltage converter.
In a specific working process, a detection signal of the current sensor is input into a sensor signal channel of the signal detection unit 2, and the correlator processes two paths of signals of the sensor signal channel and a reference signal channel and extracts the amplitude and the phase of the leakage current. The method comprises the steps that an alarm controller compares the amplitude of leakage current with a preset flashover alarm threshold value, when the amplitude of the leakage current reaches the preset flashover alarm threshold value range, the alarm controller controls a wireless transmission module to send fault data and the number of a fault insulator string or tower position data to a server, and the server sends the fault data and tower position information corresponding to the number of the fault insulator string to a mobile intelligent terminal carried by maintenance personnel; therefore, maintenance personnel can timely and accurately implement anti-pollution flashover measures on the insulator strings on the towers corresponding to the fault positions, the maintenance working efficiency can be improved, and the consumption of manpower and material resources is reduced.
As an improvement to the above embodiment, the low-current ground fault remote alarm device further includes a solar battery 8 and a photovoltaic controller 9, the solar battery is respectively connected to the rechargeable battery through the photovoltaic controller, and the photovoltaic module provided in this embodiment can charge the rechargeable battery in time to maintain long-term operation of the low-current ground fault indication device. Of course, under the condition that the solar battery 8 and the photovoltaic controller 9 are not arranged, the power supply problem of the low-current ground fault remote alarm device can be solved by replacing the rechargeable battery regularly.
As an improvement to the above embodiment, the solar cell is disposed above the waterproof case by a bracket, and the solar cell is preferably disposed obliquely so as not to be easily contaminated.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (4)
1. Undercurrent earth fault remote alarm device, including waterproof housing, its characterized in that: the wireless power supply device also comprises an alarm controller arranged in the waterproof shell, a signal detection unit connected with the alarm controller, a wireless transmission module connected with the alarm controller, and a current sensor which is arranged on the insulator string and connected with the signal detection unit;
the low-current ground fault remote alarm device further comprises a rechargeable battery and a voltage converter, wherein the rechargeable battery and the voltage converter are arranged in the waterproof shell, the rechargeable battery is connected with the voltage converter, and the voltage converter is respectively connected with the alarm controller, the signal detection unit and the wireless transmission module.
2. The low current ground fault remote alarm device of claim 1, wherein: the solar energy charging system further comprises a solar cell and a photovoltaic controller, wherein the solar cell is connected with the rechargeable battery through the photovoltaic controller.
3. The low current ground fault remote alarm device of claim 1, wherein: the signal detection unit comprises a sensor signal channel, a reference signal channel, a correlator module and a power supply module, wherein the sensor signal channel and the reference signal channel are respectively connected with the correlator module, the power supply module is respectively connected with the sensor signal channel, the reference signal channel and the correlator module, the sensor signal channel is connected with a current sensor, the correlator module is connected with an alarm controller, and the power supply module is connected with a voltage converter.
4. The low current ground fault remote alarm device of claim 2, wherein: the solar cell is arranged above the waterproof shell through a support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122823867.5U CN216485324U (en) | 2021-11-17 | 2021-11-17 | Small current earth fault remote alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122823867.5U CN216485324U (en) | 2021-11-17 | 2021-11-17 | Small current earth fault remote alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216485324U true CN216485324U (en) | 2022-05-10 |
Family
ID=81397059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122823867.5U Active CN216485324U (en) | 2021-11-17 | 2021-11-17 | Small current earth fault remote alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216485324U (en) |
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2021
- 2021-11-17 CN CN202122823867.5U patent/CN216485324U/en active Active
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