CN212410676U

CN212410676U - Voltage monitoring device with fault self-diagnosis function based on NB-lot technology

Info

Publication number: CN212410676U
Application number: CN202020232797.9U
Authority: CN
Inventors: 杨定光; 梁红霞; 王浩兵; 彭玉林; 陆立夫; 周杨
Original assignee: Xishuangbanna Power Supply Bureau of Yunnan Power Grid Co Ltd
Current assignee: Xishuangbanna Power Supply Bureau of Yunnan Power Grid Co Ltd
Priority date: 2020-02-29
Filing date: 2020-02-29
Publication date: 2021-01-26
Anticipated expiration: 2030-02-28

Abstract

The utility model relates to a voltage monitoring device based on NB-lot technique possesses trouble self-diagnosis function, including the cabinet body, install the internal voltage monitoring appearance at the cabinet, the internal trouble monitoring device that is equipped with of cabinet, trouble monitoring device include displacement monitoring module, processing module, communication module and antenna, and processing module's input is coupled in displacement monitoring module, and processing module's output is coupled in communication module and transmits displacement monitoring signal to communication module, and communication module and antenna connection, communication module are NB-lot communication module. When the voltage monitor does not upload data, the worker judges whether the voltage monitor breaks away from the connection with the power grid circuit to cause a fault according to the data uploaded by the fault monitoring device; and when the voltage monitor has the trend of breaking away from the circuit electric wire netting gradually, the staff can adjust the position of voltage monitor in advance, will lead to the factor of trouble to get rid of in advance, avoids follow-up trouble and leads to extra loss.

Description

Voltage monitoring device with fault self-diagnosis function based on NB-lot technology

Technical Field

The utility model belongs to the technical field of voltage monitoring device's technique and specifically relates to a voltage monitoring device based on NB-lot technique possesses trouble self-diagnosis function is related to.

Background

The voltage monitor is a statistical voltage monitor which continuously monitors and counts voltage deviation caused by slow change of a normal operation state of a power system. With the continuous development of power grids and the enlargement of distribution scale, the usage amount of voltage monitors is also increasing.

At present, chinese patent with publication number CN204142812U discloses a voltage monitor, the voltage monitor includes main circuit installed on the mainboard and communication module installed on the expansion board, mainboard and expansion board are connected with the socket cooperation through arranging the socket, install processing module and the signal acquisition module and the encryption module that link to each other with processing module on the mainboard, the communication module that is connected with processing module is equipped with on the expansion board. The voltage monitor uploads the power grid information collected by the corresponding node through the communication module, and a worker can monitor the whole power grid in real time at the background.

During the in-service use, voltage monitor is installed outdoors mostly, receives external environment's influence in order to reduce voltage monitor, can dispose special electric appliance cabinet, installs voltage monitor in the electric appliance cabinet. However, the outdoor environment is complex, even if an electric appliance cabinet provides certain protection for the voltage monitor, no matter human factors or environmental factors, the voltage monitor is likely to move, so that the voltage monitor cannot monitor the power grid in real time, and when the background data is reflected, a worker can easily misjudge that the power grid fails, so that the worker can make wrong processing.

SUMMERY OF THE UTILITY MODEL

To the deficiency that prior art exists, one of the purposes of the utility model is to provide a voltage monitoring device based on NB-lot technique possesses trouble self-diagnosis function, and it makes things convenient for the staff to judge the reason that causes the voltage monitoring appearance trouble through setting up trouble monitoring device to the staff makes reasonable processing.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: a voltage monitoring device with a fault self-diagnosis function based on an NB-lot technology comprises a cabinet body, a voltage monitor and an AC/DC conversion module, wherein the voltage monitor and the AC/DC conversion module are installed in the cabinet body, a cabinet door is arranged on the cabinet body, the AC/DC conversion module is electrically connected between a power grid circuit and the voltage monitor, a fault monitoring device is further arranged in the cabinet body, the output end of the AC/DC conversion module is coupled to a power supply interface of the fault monitoring device, the fault monitoring device comprises a displacement monitoring module, a processing module, a communication module and an antenna, the displacement monitoring module is used for detecting whether the voltage monitor moves and outputting a corresponding displacement monitoring signal, the input end of the processing module is coupled to the displacement monitoring module to receive the displacement monitoring signal, and the output end of the processing module is coupled to the communication module and transmits the displacement monitoring signal to, the communication module is connected with the antenna and sends out a displacement monitoring signal through the antenna, and the communication module is an NB-lot communication module.

By adopting the technical scheme, the position of the voltage monitor can be fed back according to the displacement monitoring module, and periodically uploaded to a background through a communication module, a worker compares the position of the voltage monitor during initial installation with the position of the current voltage monitor, when the position change of the voltage monitor exceeds a certain limit, the connection between the voltage monitor and the power grid circuit is easy to break, and when the voltage monitor does not upload data, a worker can judge that the voltage monitor is disconnected from the power grid circuit and carry out corresponding treatment, when the voltage monitor tends to be gradually separated from the circuit power grid, a worker can perform prejudgment through data analysis, adjust the position of the voltage monitor in advance, remove factors causing faults in advance and avoid extra loss caused by follow-up faults; when the voltage monitor does not upload data, the fault monitoring device feeds back the voltage monitor and does not have large displacement, and the fault is caused by a large reason which is not that the voltage monitor is separated from a power grid circuit.

The present invention may be further configured in a preferred embodiment as: the cabinet door is characterized in that a cabinet door monitoring module is mounted on the cabinet door and used for detecting whether the cabinet door is opened or not and outputting a corresponding opening and closing signal, the input end of the processing module is coupled to the cabinet door monitoring module to receive the opening and closing signal and transmit the opening and closing signal to the communication module, and the communication module receives the opening and closing signal and then sends the opening and closing signal through an antenna.

Through adopting above-mentioned technical scheme, the back is opened to the cabinet door, and voltage monitor and trouble monitoring device will all expose in the external world, consequently sets up cabinet door monitoring module, monitors the improper opening of cabinet door to the backstage is in time uploaded to the signal of opening and close, makes the staff in time arrive the scene, closes the cabinet door, reduces the possibility of incident.

The present invention may be further configured in a preferred embodiment as: the cabinet door monitoring module is a door magnet or a micro-control switch.

Through adopting above-mentioned technical scheme, when the cabinet door closure was on the cabinet body, no matter be door magnetism or micro-control switch, all pressed from both sides between the cabinet body and cabinet door, and when the cabinet door was opened the back, lost the back that blocks of the cabinet body, had sufficient space to supply cabinet door monitoring module to extend, changed cabinet door monitoring module's state, made processing module receive opposite signal, explain that the cabinet door is opened.

The present invention may be further configured in a preferred embodiment as: the fault monitoring device further comprises a battery and a first selection module, wherein the first selection module is used for selecting the battery or the AC/DC conversion module to be electrically connected with power supply interfaces of other modules in the fault monitoring device.

By adopting the technical scheme, when the fault monitoring device is moved and the connection between the fault monitoring device and the AC/DC conversion module is disconnected, the first selection module is switched to be powered by the battery, so that the fault monitoring device can be continuously used, and various signals detected by the fault monitoring device can be timely sent out.

The present invention may be further configured in a preferred embodiment as: the antenna comprises an internal antenna and an external antenna, the internal antenna and the communication module are mounted on the same circuit board, the external antenna is mounted outside the cabinet body, a second selection module is arranged between the antenna and the communication module, and the second selection module is used for selecting the internal antenna or the external antenna to upload signals.

By adopting the technical scheme, the external antenna is positioned outside the cabinet body, signal transmission is not blocked by the cabinet body, and the communication module sends signals by using the external antenna under normal conditions, so that the transmission capacity of the signals is enhanced; the built-in antenna is located in the cabinet body, and the built-in antenna is difficult to damage, and when the external antenna can not normally carry out signal transmission, the built-in antenna is switched to work to ensure that the fault monitoring device can upload the detected signal.

The present invention may be further configured in a preferred embodiment as: the second selection module comprises a state detector and an electromagnetic switch, the state detector is used for detecting the connection condition of the external antenna and outputting a corresponding state signal, and the electromagnetic switch is coupled to the state detector to receive the state signal and respond to the state signal to communicate the communication module and the internal antenna.

By adopting the technical scheme, when the external antenna can be normally used, the electromagnetic switch-on light disconnects the connecting circuit between the internal antenna and the communication module, so that the communication module can only use the external antenna to transmit signals; and when the communication module is disconnected with the external antenna, the state detector controls the electromagnetic switch to be closed, so that the communication module sends signals through the internal antenna.

The present invention may be further configured in a preferred embodiment as: the fault monitoring device further comprises a temperature and humidity detection module, the temperature and humidity detection module is used for detecting the temperature and humidity in the cabinet body and outputting corresponding temperature and humidity signals, and the input end of the processing module is coupled to the temperature and humidity detection module to receive the temperature and humidity signals and send the temperature and humidity signals through the communication module.

Through adopting above-mentioned technical scheme, the temperature and humidity detection module monitors the internal environment of cabinet, and when the internal high temperature that appears of cabinet, low excessively, humidity too big etc. can influence the condition of voltage monitor work, can make the staff in time observe and make corresponding processing, and the internal equipment of reduction cabinet is impaired.

The present invention may be further configured in a preferred embodiment as: the displacement monitoring module comprises a 3-axis acceleration sensor and a 3-axis magnetic field sensor, and the 3-axis acceleration sensor and the 3-axis magnetic field sensor are both installed on the voltage monitor.

Through adopting above-mentioned technical scheme, when voltage monitoring appearance appears removing, 3 axle acceleration sensor appears removing along with voltage monitoring appearance, 3 axle acceleration sensor produces corresponding signal because of the acceleration at removal in-process, thereby can reflect out voltage monitoring appearance and take place to remove, and 3 axle magnetic field sensor reflects voltage monitoring appearance's removal through the change of response place magnetic field, but because the change in magnetic field is not only caused by voltage monitoring appearance's removal, external environment's change also can lead to magnetic field variation, consequently 3 axle magnetic field sensor is only supplementary 3 axle acceleration sensor, move to voltage monitoring appearance and carry out more accurate control.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the position of the voltage monitor is monitored by arranging the fault monitoring device, and according to a signal fed back by the fault monitoring device, a worker can more accurately judge the reason of the voltage monitor when the fault occurs and accurately process the fault;

2. the second selection module is arranged to complete automatic switching between the external antenna and the internal antenna, so that the smoothness of signal transmission is guaranteed;

3. through setting up first selection module, when the electric wire netting circuit can't provide the electric energy for fault monitoring device, switch to the battery power supply, make fault monitoring device can keep work for a long time.

Drawings

FIG. 1 is a schematic diagram showing the overall structure of a voltage monitoring device according to an embodiment;

FIG. 2 is a circuit diagram of a fault monitoring device in an embodiment;

FIG. 3 is a schematic circuit diagram of a first selection module according to an embodiment;

FIG. 4 is a schematic circuit diagram of a second selection module according to an embodiment.

In the figure, 1, a cabinet body; 2. a cabinet door; 3. a voltage monitor; 4. an AC/DC conversion module; 5. a fault monitoring device; 51. a displacement monitoring module; 52. a processing module; 53. a communication module; 54. a second selection module; 541. a state detector; 542. an electromagnetic switch; 55. a first selection module; 561. an external antenna; 562. a built-in antenna; 57. a cabinet door monitoring module; 58. a temperature and humidity detection module; 59. a battery.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a voltage monitoring device based on NB-lot technique possesses trouble self-diagnosis function, including the cabinet body 1 that has the inner chamber, the inner chamber of the cabinet body 1 is opened on one side lateral wall of the cabinet body 1 has the opening, and it has cabinet door 2 to articulate on the cabinet body 1. When the cabinet door 2 covers the opening, the cabinet door 2 separates the inner cavity of the cabinet body 1 from the outside. The inner cavity of the cabinet body 1 is internally provided with a voltage monitor 3 and a fault monitoring device 5. An external antenna 561 is erected on the top of the outer wall of the cabinet 1, and the external antenna 561 is connected with the fault monitoring device 5.

Referring to fig. 1 and 2, the fault monitoring device 5 includes a displacement monitoring module 51, a temperature and humidity detecting module 58, a cabinet door monitoring module 57, a processing module 52, and a communication module 53. The displacement monitoring module 51 is installed on the voltage monitor 3, and the displacement monitoring module 51 is configured to detect whether the voltage monitor 3 moves and output a corresponding displacement monitoring signal. The temperature and humidity detection module 58 is installed in the cabinet body 1, and the temperature and humidity detection module 58 is used for detecting the temperature and humidity in the cabinet body 1 and outputting corresponding temperature and humidity signals. The cabinet door monitoring module 57 is installed at the top of the cabinet door 2, and the cabinet door monitoring module 57 is used for detecting whether the cabinet door 2 is opened and outputting a corresponding opening and closing signal. The processing module 52 has a plurality of input terminals, the input terminals of the processing module 52 are respectively coupled to the output terminals of the displacement monitoring module 51, the temperature and humidity detection module 58, and the cabinet door monitoring module 57, the output terminal of the processing module 52 is coupled to the communication module 53, the processing module 52 receives the displacement monitoring signal, the temperature and humidity detection signal, and the on-off signal, and then transmits the signals to the communication module 53, and the communication module 53 uploads the signals to the background through the external antenna 561.

The displacement monitoring module 51 comprises a 3-axis acceleration sensor and a 3-axis magnetic field sensor, and the 3-axis acceleration sensor and the 3-axis magnetic field sensor are both mounted on the voltage monitor 3. After the voltage monitor 3 is first mounted, the data detected by the 3-axis acceleration sensor and the 3-axis magnetic field sensor is used as initial data. When the cabinet body 1 is collided or the voltage monitor 3 is carried manually, the staff judges whether the voltage monitor 3 contacts the detection of the power grid circuit according to the changed data uploaded by the 3-axis acceleration sensor and the 3-axis magnetic field sensor. The cabinet door monitoring module 57 is a door magnet or a micro-control switch. The temperature and humidity detection module 58 is a combination of a temperature sensor and a humidity sensor.

An AC/DC conversion module 4 is arranged between the voltage monitor 3 and the power grid circuit. Referring to fig. 2, the output of the AC/DC conversion module 4 is also electrically connected to a fault monitoring device 5. The fault monitoring device 5 further comprises a battery 59 and a first selection module 55, the first selection module 55 being configured to select either the battery 59 or the AC/DC conversion module 4 to be electrically connected to the power supply interfaces of the other modules in the fault monitoring device 5. In order to supply power to the battery 59 for a long time, the processing module 52 is a CPU with low power consumption, and the processing module 52 is not always in an operating state, and the processing module 52 periodically starts to process data and then goes to sleep again. The battery 59 is a lithium-thionyl chloride battery 59, can be used at the temperature of-60 ℃ to +85 ℃, has a nominal capacity of 6500mAh, an open-circuit voltage of 3.6V and a maximum continuous working current of 1000mA, and can directly supply power to the communication module 53 and the processing module 52.

Referring to fig. 3, the first selection module 55 is an intermediate relay KM1, one end of the intermediate relay KM1 is coupled to the output end of the AC/DC conversion module 4, the other end of the intermediate relay KM1 is coupled to one end of a normally closed contact KM1-1 of the intermediate relay KM1, the other end of the normally closed contact KM1-1 is coupled to the battery 59, and a connection point between the intermediate relay KM1 and the normally closed contact KM1-1 outputs a voltage Ui that supplies power to other modules in the fault monitoring apparatus 5.

When the AC/DC conversion module 4 can be used normally and the power grid circuit can supply power normally, the intermediate relay KM1 is in an operating state all the time, and the normally closed contact KM1-1 of the intermediate relay KM1 is opened, so that the battery 59 is no longer connected into the circuit. When the AC/DC conversion module 4 or the grid circuit has a problem, which causes the intermediate relay KM1 to lose power, the normally closed contact KM1-1 of the intermediate relay KM1 is closed, so that the battery 59 is connected to the circuit, and the battery 59 supplies power to the fault monitoring device 5.

Referring to fig. 2 and 4, an internal antenna 562 is further provided, and the internal antenna 562 and the communication module 53 are soldered on the same circuit board on which the second selection module 54 is further mounted. The second selection module 54 includes a state detector 541 and an electromagnetic switch 542, the state detector 541 is configured to detect a connection condition of the external antenna 561 and output a corresponding state signal, one end of the electromagnetic switch 542 is coupled to the communication module 53, the other end of the electromagnetic switch 542 is coupled to the internal antenna 562, and a signal receiving end of the electromagnetic switch 542 is coupled to the state detector 541 to receive the state signal and respond to the state signal. When the external antenna 561 is dropped or damaged, and the like, so that the external antenna 561 cannot send a signal, the state detector 541 transmits a corresponding state signal to the electromagnetic switch 542, so that the electromagnetic switch 542 is closed, the internal antenna 562 is communicated with the communication module 53, and the internal antenna 562 sends a signal transmitted by the communication module 53. The communication module 53 is an NB-lot communication module 53, and NB-IoT uses a narrowband technology, which has the characteristics of large link budget, long transmission distance, and the like, compared with a 2G network, so that the built-in antenna 562 is used, and the signal transmission capability is good.

In the actual use process, the fault monitoring device 5 monitors the position of the voltage monitor 3 and the opening and closing state of the cabinet door 2 regularly, and data generated by monitoring is uploaded to a background. When the AC/DC conversion module 4 is damaged and cannot continue to supply power, the fault monitoring device 5 is switched to the battery 59 to supply power, so that the fault monitoring device 5 can continue to upload data, and a worker can know that the AC/DC conversion module 4 is in fault and timely maintain the fault.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a voltage monitoring device based on NB-lot technique possesses trouble self-diagnosis function, includes cabinet body (1), installs voltage monitoring appearance (3) and AC/DC conversion module (4) in the cabinet body (1), be equipped with cabinet door (2) on the cabinet body (1), AC/DC conversion module (4) electricity is connected between grid circuit and voltage monitoring appearance (3), its characterized in that: a fault monitoring device (5) is further arranged in the cabinet body (1), the output end of the AC/DC conversion module (4) is coupled to a power supply interface of the fault monitoring device (5), the fault monitoring device (5) comprises a displacement monitoring module (51), a processing module (52), a communication module (53) and an antenna, the displacement monitoring module (51) is used for detecting whether the voltage monitor (3) moves and outputting a corresponding displacement monitoring signal, the input end of the processing module (52) is coupled to the displacement monitoring module (51) to receive the displacement monitoring signal, the output end of the processing module (52) is coupled with the communication module (53) and transmits the displacement monitoring signal to the communication module (53), the communication module (53) is connected with the antenna and sends out a displacement monitoring signal through the antenna, and the communication module (53) is an NB-lot communication module (53).

2. The voltage monitoring device with the fault self-diagnosis function based on the NB-lot technology as claimed in claim 1, wherein: the cabinet door is characterized in that a cabinet door monitoring module (57) is installed on the cabinet door (2), the cabinet door monitoring module (57) is used for detecting whether the cabinet door (2) is opened or not and outputting a corresponding opening and closing signal, the input end of the processing module (52) is coupled to the cabinet door monitoring module (57) to receive the opening and closing signal and transmit the opening and closing signal to the communication module (53), and the communication module (53) also sends the opening and closing signal through an antenna after receiving the opening and closing signal.

3. The voltage monitoring device with the fault self-diagnosis function based on the NB-lot technology as claimed in claim 2, wherein: the cabinet door monitoring module (57) is a door magnet or a micro-control switch.

4. The voltage monitoring device with the fault self-diagnosis function based on the NB-lot technology as claimed in claim 1, wherein: the fault monitoring device (5) further comprises a battery (59) and a first selection module (55), wherein the first selection module (55) is used for selecting the battery (59) or the AC/DC conversion module (4) to be electrically connected with the power supply interfaces of other modules in the fault monitoring device (5).

5. The voltage monitoring device with the fault self-diagnosis function based on the NB-lot technology as claimed in claim 1, wherein: the antenna comprises an internal antenna (562) and an external antenna (561), the internal antenna (562) and the communication module (53) are mounted on the same circuit board, the external antenna (561) is mounted outside the cabinet body (1), a second selection module (54) is arranged between the antenna and the communication module (53), and the second selection module (54) is used for selecting the internal antenna (562) or the external antenna (561) to upload signals.

6. The voltage monitoring device with the fault self-diagnosis function based on the NB-lot technology as claimed in claim 5, wherein: the second selection module (54) comprises a state detector (541) and an electromagnetic switch (542), the state detector (541) is used for detecting the connection condition of the external antenna (561) and outputting a corresponding state signal, and the electromagnetic switch (542) is coupled to the state detector (541) to receive the state signal and respond to the state signal to communicate the communication module (53) and the internal antenna (562).

7. The voltage monitoring device with the fault self-diagnosis function based on the NB-lot technology as claimed in claim 1, wherein: the fault monitoring device (5) further comprises a temperature and humidity detection module (58), the temperature and humidity detection module (58) is used for detecting the temperature and humidity in the cabinet body (1) and outputting corresponding temperature and humidity signals, and the input end of the processing module (52) is coupled to the temperature and humidity detection module (58) and used for receiving the temperature and humidity signals and sending the temperature and humidity signals through the communication module (53).

8. The voltage monitoring device with the fault self-diagnosis function based on the NB-lot technology as claimed in claim 1, wherein: the displacement monitoring module (51) comprises a 3-axis acceleration sensor and a 3-axis magnetic field sensor, and the 3-axis acceleration sensor and the 3-axis magnetic field sensor are both installed on the voltage monitor (3).