CN211402669U - Low-voltage distribution network leakage current monitoring device - Google Patents
Low-voltage distribution network leakage current monitoring device Download PDFInfo
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- CN211402669U CN211402669U CN201921540855.8U CN201921540855U CN211402669U CN 211402669 U CN211402669 U CN 211402669U CN 201921540855 U CN201921540855 U CN 201921540855U CN 211402669 U CN211402669 U CN 211402669U
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Abstract
The utility model discloses a low voltage distribution network leakage current monitoring devices, it includes the MCU unit, the acquisition unit with MCU unit electricity is connected, a display element, the button unit, the unit of making a video recording, the RTC unit, the communication unit, the power supply unit, and a plurality of pincerlike mutual-inductors of being connected with the acquisition unit electricity, these a plurality of pincerlike mutual-inductors are connected with the acquisition unit electricity and are used for acquireing the leakage current on each branch road or the main line on the low voltage distribution network, this unit of making a video recording is used for scanning the two-dimensional code or the bar code that load user information, each branch road or bus leakage current that this MCU unit acquireed pincerlike mutual-inductor carry out the comparison. It has the following advantages: the real-time online intelligent monitoring of the leakage current is realized, the automation and the intelligent degree are high, the position of the leakage current can be rapidly and clearly known, and the installation and the use are convenient.
Description
Technical Field
The utility model relates to a low voltage network leakage current monitoring devices.
Background
The low-voltage distribution network is disordered and has uneven wiring quality, and particularly in rainy and humid seasons, the electric leakage can be more prominent; the existing low-voltage leakage monitoring device can only monitor the leakage current of a single feeder line and cannot know the branch circuit where the leakage current occurs; and the equipment deployment is more complicated, needs loaded down with trivial details wiring procedure, and data need be uploaded to the system, need draw network topology to combine many electric leakage monitoring devices just can fix a position out the trouble circuit, it is inconvenient to use.
SUMMERY OF THE UTILITY MODEL
The utility model provides a low voltage distribution network leakage current monitoring devices, it has overcome in the background art the not enough of prior art.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model provides a low voltage distribution network leakage current monitoring devices, it includes the MCU unit, the acquisition unit, a display element, the key unit, the unit of making a video recording, the RTC unit, the communication unit, power supply unit and a plurality of pincerlike mutual-inductors, this acquisition unit, the key unit, the display element, the RTC unit, the unit of making a video recording, the communication unit all is connected with the MCU unit electricity, this power supply unit is used for providing the electric energy for this monitoring devices, this a plurality of pincerlike mutual-inductors are connected with the acquisition unit electricity and are used for acquireing the leakage current on each branch road or the main line on the low voltage distribution network, this the unit of making a video recording is used for scanning the two-dimensional code or the bar code that carry user information, this MCU unit carries out.
In one embodiment: the MCU unit, the display unit, the key unit, the camera shooting unit and the RTC unit are all built in a touch screen all-in-one machine.
In one embodiment: the communication unit is a wireless communication module and can be in wireless communication connection with a remote master station.
In one embodiment: the MCU unit adopts an ARM processor.
In one embodiment: the touch display screen of the touch screen all-in-one machine adopts a touch color liquid crystal screen.
Compared with the background technology, the technical scheme has the following advantages:
the present case adopts MCU unit to realize automatic acquisition, the judgement of leakage current and with the communication of long-range main website, realizes the real-time online intelligent monitoring of leakage current, and degree of automation, intellectuality are high, easy to assemble and use.
The present case adopts a plurality of pincerlike mutual-inductors to acquire the leakage current on each branch road or the main line simultaneously, can know clearly fast the place that the leakage current takes place, and simple to operate, convenient to use.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic system diagram of a leakage current monitoring device for a low-voltage distribution network according to this embodiment.
Fig. 2 is a second system schematic diagram of the leakage current monitoring device for the low voltage distribution network according to the present embodiment.
Detailed Description
Referring to fig. 1 and 2, a leakage current monitoring device for a low-voltage distribution network comprises an MCU unit 1, an acquisition unit 2, a display unit 3, a key unit 4, a camera unit 5, an RTC unit 6, a communication unit 7, a power supply unit 8 and a plurality of pincerlike transformers 9, the acquisition unit 2, the key unit 4, the display unit 3, the RTC unit 6, the camera unit 5 and the communication unit 7 are all electrically connected with the MCU unit 1, the power supply unit 8 is used for supplying electric energy to the monitoring device, the plurality of pincerlike transformers 9 are electrically connected with the acquisition unit 2 and are used for acquiring leakage current on each branch or main line of the low-voltage distribution network, the camera unit 5 is used for scanning a two-dimensional code or a bar code carrying user information, and the MCU unit 1 compares the leakage current of each branch or bus obtained by the pincerlike transformer 9 with a set threshold to determine the branch where the leakage current occurs.
The pincerlike transformer 9 described in this embodiment can collect leakage current information, and supply the output signal to the collecting unit 2 for use. The acquisition unit 2 transmits data and supplies power with the MCU unit 1 through a USB interface, the power supply unit 8 can realize charging and discharging management, an alternating current 220V power supply is converted into direct current +5V output, and the power supply unit 8 can also comprise a +5V rechargeable lithium battery for providing a 5V power supply for the device. The communication unit 7 is a wireless communication module and can be connected to the remote master station 20 in a wireless communication manner.
The MCU unit 1, the display unit 3, the key unit 4, the camera unit 5 and the RTC unit 6 are all built in a touch screen all-in-one machine 10, the touch screen all-in-one machine 10 is small in size and can be held by hands, an industrial control chip of an ARM processor is adopted, and the touch screen all-in-one machine is low in power consumption and resistant to high and low temperatures.
The two-dimensional code or barcode carrying the user information (including the user address information) is recognized by the camera unit 5. The touch screen all-in-one machine 10 can monitor the occurrence time of a leakage current signal, synchronously record the instantaneous value and waveform of the leakage current and mark address information of a detected line, and upload the information to the remote master station 20 in a wireless communication mode.
The RTC unit 6 can provide accurate time information for the MCU unit 1, the time accuracy is 1ms, and the error in 1 measurement period is not more than 0.5 ms.
In this embodiment, the key unit 4 includes 6 keys, which are a power-on key, a setup key, a detect/confirm key, a clear/return key, a flip-up key, and a flip-down key. The starting button is used for starting and shutdown control. The setup key includes four options: detecting starting, communication connection, address setting and history inquiry, performing corresponding functions by matching an up-turning key, a down-turning key and a confirmation key, detecting a starting option to start the online test work of the leakage current, and recording all the measured data; the communication connection option is used for opening a wireless communication interface, is connected with the remote master station and uploads data to the remote master station; the address setting option is used for automatically identifying the address of the measuring point; the historical query option is used for querying the measured leakage current information, and a leakage current waveform or a data value can be called through the touch display screen. The detection/confirmation key is used for starting the detection of the line leakage current, and whether the test information is recorded or cleared is confirmed according to the test result after the detection is finished. The clear/return button is used to clear test information or return from a function menu. The up-turning key and the down-turning key are used for viewing test data or a function menu.
The display unit 3 (i.e. the touch display screen of the touch screen all-in-one machine 10) adopts a touch color liquid crystal screen for displaying test information and a function menu, and is matched with the key unit to start testing or query relevant information.
When this low-voltage distribution network leakage current monitoring devices specifically used:
and selecting address setting options according to the bar code information of the electric energy meter to determine a line to be tested, marking a certain line to be tested as a main line, and marking the rest as branch lines to be tested. The device utilizes pincerlike mutual-inductor to collect the leakage current information of each circuit to transmit to MCU unit analysis and processing, data message can upload to long-range main website through radio communication simultaneously, is convenient for long-range looking over and analysis failure reason.
Setting an operation mode:
the leakage current information can be stored and analyzed through two modes, namely leakage current instantaneous value detection and leakage current waveform detection. Whether leakage current instantaneous value detection or waveform analysis is adopted, if a criterion action condition is met, a short message alarm is sent, and stored data information is uploaded to a remote main station. When the leakage current detection is started each time, a new data table is established, and the serial number of the measuring point is reset to zero. The two modes are as follows:
(1) leakage current transient detection
The device can detect and store the instantaneous value of the leakage current in real time. Setting current threshold values of different gears according to different measured lines, marking with different colors, and taking the current instantaneous value exceeding the current threshold value as the alarm basis of the out-of-limit leakage current.
The leakage currents are further ordered during the acquisition process. And (4) counting and sequencing the leakage current at a certain moment by taking each measuring line as a unit, or counting the leakage current of a certain line by taking time as a unit.
Meanwhile, the counted leakage current is analyzed, and whether the reason that the leakage current exceeds the limit is that an electric shock accident or a ground fault occurs in a certain branch or a bus does not exceed the limit, and the like is judged.
For the collected leakage current data, the device can check real-time information through the touch screen, call historical data information and record installation position information. And uploading the leakage current data to a database of a remote master station at regular time, and performing subsequent fault analysis on the leakage current data in a real-time database and a historical database by using upper computer software.
(2) Waveform detection
The current pincerlike ammeter used for overhauling and troubleshooting can only detect the instantaneous magnitude of the leakage current, and the condition of the leakage current can be more visually known through the waveform of the leakage current, so that the fault can be conveniently diagnosed, and the waveform of the leakage current needs to be collected.
The device can automatically collect, store and display the leakage current waveform of the measuring line so as to further analyze the fault of the leakage current waveform data, such as FFT analysis and wavelet transformation.
For the detected leakage current waveform, relatively complex algorithm analysis such as a convolutional neural network, a support vector machine and the like can be further realized after the leakage current data is transmitted to the database, so that the reason of the line fault can be more accurately judged.
Among the prior art, the electric leakage current analysis mode has the multiple, and the present case adopts the MCU unit to realize the automatic acquisition of leakage current, judge and with the communication of remote main website, realizes the real-time online intelligent monitoring of leakage current, and is automatic, intelligent degree is high, and this case still adopts a plurality of pincerlike mutual-inductors to acquire the leakage current on each branch road or the trunk line simultaneously, carries out the analysis to the leakage current information on many circuits, can learn the place position that the leakage current takes place fast definitely, and simple to operate, convenient to use.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.
Claims (5)
1. The utility model provides a low voltage distribution network leakage current monitoring devices which characterized in that: the device comprises an MCU unit, an acquisition unit, a display unit, a key unit, a camera unit, an RTC unit, a communication unit, a power supply unit and a plurality of pincerlike mutual inductors, the acquisition unit, the key unit, the display unit, the RTC unit, the camera unit, the communication unit is electrically connected with the MCU unit, the power supply unit is used for providing electric energy for the monitoring device, the pincerlike mutual inductors are electrically connected with the acquisition unit and are used for acquiring leakage current on each branch or a main line on a low-voltage distribution network, the camera unit is used for scanning two-dimensional codes or bar codes carrying user information, and each branch or bus leakage current acquired by the pincerlike mutual inductors is compared with a set threshold value by the MCU unit to judge the branch where the leakage current.
2. A low voltage distribution network leakage current monitoring device according to claim 1, characterized in that: the MCU unit, the display unit, the key unit, the camera shooting unit and the RTC unit are all built in a touch screen all-in-one machine.
3. A low voltage distribution network leakage current monitoring device according to claim 1, characterized in that: the communication unit is a wireless communication module and can be in wireless communication connection with a remote master station.
4. A low voltage distribution network leakage current monitoring device according to claim 1, characterized in that: the MCU unit adopts an ARM processor.
5. A low voltage distribution network leakage current monitoring device according to claim 2, characterized in that: the touch display screen of the touch screen all-in-one machine adopts a touch color liquid crystal screen.
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| CN201921540855.8U CN211402669U (en) | 2019-09-17 | 2019-09-17 | Low-voltage distribution network leakage current monitoring device |
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| CN201921540855.8U CN211402669U (en) | 2019-09-17 | 2019-09-17 | Low-voltage distribution network leakage current monitoring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671408A (en) * | 2021-08-09 | 2021-11-19 | 国仪量子(合肥)技术有限公司 | Leakage current detection method and detection device for lithium battery |
| CN113740762A (en) * | 2021-06-23 | 2021-12-03 | 贵州电网有限责任公司 | Low-voltage electricity stealing and leakage detecting device with acquisition module |
| CN113884943A (en) * | 2021-10-28 | 2022-01-04 | 广东电网有限责任公司 | Leakage fault analysis method, device, equipment and medium |
| CN114285008A (en) * | 2021-12-06 | 2022-04-05 | 国网浙江省电力有限公司台州市路桥区供电公司 | Intelligent electric leakage detection device based on low-voltage distribution network |
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2019
- 2019-09-17 CN CN201921540855.8U patent/CN211402669U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740762A (en) * | 2021-06-23 | 2021-12-03 | 贵州电网有限责任公司 | Low-voltage electricity stealing and leakage detecting device with acquisition module |
| CN113671408A (en) * | 2021-08-09 | 2021-11-19 | 国仪量子(合肥)技术有限公司 | Leakage current detection method and detection device for lithium battery |
| CN113884943A (en) * | 2021-10-28 | 2022-01-04 | 广东电网有限责任公司 | Leakage fault analysis method, device, equipment and medium |
| CN113884943B (en) * | 2021-10-28 | 2023-08-01 | 广东电网有限责任公司 | Leakage fault analysis method, device, equipment and medium |
| CN114285008A (en) * | 2021-12-06 | 2022-04-05 | 国网浙江省电力有限公司台州市路桥区供电公司 | Intelligent electric leakage detection device based on low-voltage distribution network |
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