CN212410687U

CN212410687U - Voltage monitoring device with fault self-diagnosis function

Info

Publication number: CN212410687U
Application number: CN202020233105.2U
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 who possesses trouble self-diagnosis function, it includes the voltage monitoring appearance, AC/DC conversion module, the voltage monitoring appearance includes first processing module and first communication module, still include trouble monitoring device, trouble monitoring device includes second processing module, second communication module, first monitoring module, second processing module transmits the second monitoring signal of the first monitoring signal of first monitoring module output and second monitoring module output to second communication module, second communication module sends first monitoring signal and second monitoring signal through the antenna. When the AC/DC conversion module cannot provide normal working voltage, the AC/DC conversion module has a problem at a high probability, and when the AC/DC conversion module provides the normal working voltage and the first processing module does not output the voltage, the first processing module fails, and a worker can arrange a maintenance scheme in a targeted manner, so that the response speed and the repair speed after the failure occurs are increased.

Description

Voltage monitoring device with fault self-diagnosis function

Technical Field

The utility model belongs to the technical field of voltage monitoring device's technique and specifically relates to a voltage monitoring device who 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.

In practical use, in order to reduce monitoring cost, an AC/DC conversion circuit is often used to convert AC power of a power grid into DC power and use the DC power as a power source of a voltage monitor. However, the voltage monitor is lack of a fault diagnosis mechanism, and no matter the voltage monitor loses power supply due to the fault of an external power grid or the voltage monitor breaks down, the voltage monitor cannot upload data to a background. When the data are not successfully uploaded to the background, the staff cannot judge whether the voltage monitor fails or the power grid monitored by the voltage monitor fails. The workers are required to check the fault on site, so that repeated investment of manpower and material resources is caused, and the fault removal efficiency is low.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, one of the purposes of the utility model is to provide a voltage monitoring device who possesses trouble self-diagnosis function, it has the advantage that supplementary staff carries out the fault reason and judges, alleviates staff's work load.

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 comprises a voltage monitor, and an AC/DC conversion module connected between a power grid circuit and the voltage monitor, wherein the voltage monitor comprises a first processing module and a first communication module, and further comprises a fault monitoring device, the fault monitoring device comprises a second processing module, a second communication module, a first monitoring module, a second monitoring module and an antenna, the first monitoring module is used for monitoring whether the AC/DC conversion module normally outputs a corresponding first monitoring signal to the voltage monitor and outputting a corresponding second monitoring signal, the second monitoring module is used for monitoring whether the first processing module normally outputs a corresponding second monitoring signal, the second processing module is used for receiving the first monitoring signal and the second monitoring signal and transmitting the first monitoring signal and the second monitoring signal to the second communication module, and the second communication module sends out the first monitoring signal and the second monitoring signal through the antenna.

By adopting the technical scheme, the first monitoring module and the second monitoring module can respectively collect the power supply condition of the AC/DC conversion module and the output condition of the first processing module, when the AC/DC conversion module cannot provide normal working voltage, the failure reason is more likely that the AC/DC conversion module has problems, when the AC/DC conversion module provides normal working voltage and the first processing module does not output, the failure of the first processing module is explained, a worker can pertinently arrange a maintenance scheme, and the response speed and the repair speed after the failure occurs are accelerated.

The present invention may be further configured in a preferred embodiment as: and a lightning protection module for protecting the AC/DC conversion circuit is arranged between the AC/DC conversion circuit and the power grid circuit.

Through adopting above-mentioned technical scheme, because whole voltage monitoring devices installs outdoors, and the electric wire netting circuit arranges in higher department through the wire pole again, attracts the thunder and lightning easily in thunderstorm rainy day, and the thunder and lightning hits the electric wire netting or hits near the electric wire netting, can make transient overvoltage appear on the electric wire netting, and the overvoltage can be shared to the lightning protection module, and the overvoltage reduces through lightning protection module back voltage, is difficult to again cause the damage to AC/DC conversion module.

The present invention may be further configured in a preferred embodiment as: the lightning protection device further comprises a state display module, wherein the state display module is coupled to the lightning protection module and used for monitoring whether the lightning protection module breaks down or not.

Through adopting above-mentioned technical scheme, the protection module is hit in the lightning protection has life, and many times overvoltage impact also can reduce the performance that the protection module was hit in the lightning protection, and after the protection module was hit in the lightning protection damaged, the state display module shows, makes the staff can in time change the protection module is hit in the lightning protection.

The present invention may be further configured in a preferred embodiment as: the liquid crystal display screen is further included, and the output ends of the first processing module and the second processing module are coupled to the input end of the liquid crystal display screen.

Through adopting above-mentioned technical scheme, liquid crystal display is used for local demonstration, can show the data that voltage monitoring appearance, fault monitoring device gathered, makes things convenient for the staff to examine after the field maintenance whether whole device normally works.

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 the power supply interfaces of other modules in the fault monitoring device.

By adopting the technical scheme, when the power grid circuit cannot supply power to the fault monitoring device through the AC/DC conversion module, the first selection module is switched to be supplied with power by the battery, so that the fault monitoring device can be continuously used, and various signals monitored 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 second communication module are installed on the same circuit board, the external antenna is far away from the second communication module, a second selection module is arranged between the antenna and the second communication module, and the second selection module is used for selecting the internal antenna or the external antenna to upload signals.

Through adopting above-mentioned technical scheme, built-in antenna is close to second communication module, and built-in antenna can obtain better protection, be difficult to appear damaging. Under normal conditions, the communication module uses an external antenna to send signals, and the transmission capacity of the signals is enhanced; when the external antenna can not normally transmit signals, the internal antenna is switched to work to ensure that the fault monitoring device can upload the monitored signals.

The present invention may be further configured in a preferred embodiment as: the second selection module comprises a state monitor and an electromagnetic switch, the state monitor is used for monitoring the connection condition of the external antenna and outputting a corresponding state signal, and the electromagnetic switch is coupled to the state monitor to receive the state signal and respond to the state signal to communicate the second 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 second communication module, so that the second communication module can only use the external antenna to transmit signals; when the second communication module is disconnected from the external antenna, the state monitor controls the electromagnetic switch to be closed, so that the second communication module sends signals through the internal antenna.

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

1. by arranging the fault monitoring device, according to a signal fed back by the fault monitoring device, a worker can more accurately judge the reason when the voltage monitor has a fault and timely process the fault;

2. by arranging the lightning protection module, the possibility that the AC/DC conversion module is subjected to overvoltage impact is reduced, so that the power supply of the voltage monitor is effectively guaranteed;

3. through setting up the state display module, demonstrate the performance of lightning protection module, make things convenient for the staff in time to change the lightning protection module, further improve the protection to AC/DC conversion module.

Drawings

FIG. 1 is a schematic connection diagram of the overall structure in the embodiment;

FIG. 2 is a schematic circuit diagram of a first selection module according to an embodiment;

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

FIG. 4 is a schematic circuit diagram of a lightning protection module according to an embodiment.

In the figure, 1, a voltage monitor; 11. a first processing module; 12. a first communication module; 2. a fault monitoring device; 21. a second processing module; 22. a second communication module; 23. a first monitoring module; 24. a second monitoring module; 25. a built-in antenna; 26. an external antenna; 3. a liquid crystal display screen; 4. a lightning protection module; 5. a status display module; 6. a battery; 7. a first selection module; 8. a second selection module; 81. a condition monitor; 82. an electromagnetic switch; 9. and an AC/DC conversion module.

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 who possesses trouble self-diagnosis function, including voltage monitoring appearance 1, trouble monitoring device 2, liquid crystal display 3 and AC/DC conversion module 9, AC/DC conversion module 9 is used for converting the alternating current of grid circuit into the direct current and provides voltage monitoring appearance 1 and trouble monitoring device 2 with the direct current and uses, is equipped with lightning protection module 4 between AC/DC conversion module 9 and the grid circuit. Liquid crystal display 3 is used for local demonstration, can show the data display that voltage monitor 1, fault monitoring device 2 gathered, makes things convenient for the staff to examine after the field maintenance whether whole device normally works.

Referring to fig. 1, the voltage monitor 1 includes a signal acquisition module (not shown), a first processing module 11 and a first communication module 12. The signal acquisition module is used for acquiring voltage and current information of the voltage of the power grid and outputting corresponding power grid signals, and the first processing module 11 is coupled to the signal acquisition module to receive the power grid signals and transmit the power grid signals to the first communication module 12. The first processing module 11 simultaneously transmits the power grid signal to the liquid crystal display 3 for display. The first communication module 12 is a 4G communication module, and the first communication module 12 directly uploads a power grid signal through a 4G network.

Referring to fig. 1, the fault monitoring apparatus 2 includes a second processing module 21, a second communication module 22, a first monitoring module 23, a second monitoring module 24 and an antenna, where the first monitoring module 23 is configured to monitor whether the power supplied to the voltage monitor 1 from the AC/DC conversion module 9 is normally output and output a corresponding first monitoring signal, the second monitoring module 24 is configured to monitor whether the first processing module 11 is normally output and output a corresponding second monitoring signal, the second processing module 21 is configured to receive the first monitoring signal and the second monitoring signal and transmit the first monitoring signal and the second monitoring signal to the second communication module 22, and the second communication module 22 transmits the first monitoring signal and the second monitoring signal through the antenna.

Referring to fig. 1, the battery 6 and the first selection module 7 are also included, the battery 6 is a lithium-thionyl chloride battery 6 and can be used at a temperature ranging from-60 ℃ to +85 ℃, the nominal capacity is 6500mAh, the open-circuit voltage is 3.6V, and the maximum continuous working current is 1000 mA. The first selection module 7 is used to select either the battery 6 or the AC/DC conversion module 9 to supply power to the fault monitoring device 2.

Referring to fig. 2, the first selection module 7 is an intermediate relay KM1, one end of the intermediate relay KM1 is coupled to the output end of the AC/DC conversion module 9, 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 6, 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 2.

When the AC/DC conversion module 9 can be used normally and the power grid circuit can supply power normally, the intermediate relay KM1 is in the working state all the time, and the normally closed contact KM1-1 of the intermediate relay KM1 is opened, so that the battery 6 is not connected into the circuit any more. When the AC/DC conversion module 9 or the grid circuit has a problem, which causes the power loss of the intermediate relay KM1, the normally closed contact KM1-1 of the intermediate relay KM1 is closed, so that the battery 6 is connected to the circuit, and at this time, the battery 6 supplies power to the fault monitoring apparatus 2.

Referring to fig. 1 and 3, the antenna includes an external antenna 26 and an internal antenna 25, and a second selection module 8 is disposed between the antenna and the second communication module 22. The second selection module 8 includes a status monitor 81 and an electromagnetic switch 82, the status monitor 81 is used for monitoring the connection status of the external antenna 26 and outputting a corresponding status signal, one end of the electromagnetic switch 82 is coupled to the communication module, the other end of the electromagnetic switch 82 is coupled to the internal antenna 25, and a signal receiving end of the electromagnetic switch 82 is coupled to the status monitor 81 for receiving the status signal and responding to the status signal. When the external antenna 26 fails to send a signal due to reasons such as falling off or damage of the external antenna 26, the status monitor 81 transmits a corresponding status signal to the electromagnetic switch 82, so that the electromagnetic switch 82 is closed, the internal antenna 25 is communicated with the communication module, and the internal antenna 25 sends a signal transmitted by the communication module. The communication module is an NB-lot communication module, NB-IoT adopts a narrowband technology, and compared with a 4G network, the communication module has the characteristics of large link budget, long transmission distance and the like, so that the built-in antenna 25 is adopted, and the signal transmission capability is good.

Referring to fig. 1, a status display module 5 is disposed on the lightning protection module 4, and the status display module 5 is coupled to the lightning protection module 4 and is configured to monitor whether the lightning protection module 4 fails.

Referring to fig. 4, the lightning protection module 4 includes a fuse FU2 and a voltage dependent resistor RV. The status display module 5 includes a diode D1, a resistor R1, and a light emitting diode LED 1. The live wire of the power grid is connected with a fuse FU1 in series, the fuse FU1 is a current fuse generally, and the fuse FU2 is a temperature fuse.

Referring to fig. 4, one end of the fuse FU2 is coupled to the live line of the power grid, the other end of the fuse FU2 is coupled to one end of the varistor RV, and the other end of the varistor RV is coupled to the zero line of the power grid. The anode of the diode D1 is coupled to the connection point between the fuse FU2 and the voltage dependent resistor RV, the cathode of the diode D1 is coupled to one end of the resistor R1, the other end of the resistor R1 is coupled to the anode of the light emitting diode LED1, and the cathode of the light emitting diode LED1 is coupled to the neutral line of the power grid.

When lightning strike occurs, the voltage on the power grid is overlarge, the voltage dependent resistor RV is conducted by overvoltage, and a large amount of current passes through the voltage dependent resistor RV to protect the AC/DC conversion module 9 behind. When the voltage dependent resistor RV is subjected to overvoltage impact for many times, the service performance of the voltage dependent resistor RV is reduced, and the current in a circuit is increased to cause overheating damage. After the varistor is damaged, current can flow through the diode D1, the resistor R1 and the light emitting diode LED1, causing the light emitting diode LED1 to emit light. The light emitting diode can be installed in the liquid crystal display screen 3, and is convenient for a worker to observe.

The implementation principle of the embodiment is as follows: the voltage input into the AC/DC conversion module 9 by the grid circuit is within a suitable range by the lightning protection module 4, and the AC/DC conversion module 9 converts the AC power of the grid circuit into DC power to supply the voltage monitor 1 and the fault monitoring device 2. The information on the power grid circuit is collected by the voltage monitor 1, the collected information is transmitted to the liquid crystal display screen 3 to be displayed by the body, and the collected information is uploaded to the background to be monitored by a worker. The fault monitoring device 2 monitors the running state of the voltage monitor 1 regularly, and monitoring data can be transmitted to the liquid crystal display 3 and the background. When the AC/DC conversion module 9 is damaged and cannot continue to supply power, the fault monitoring device 2 is switched to the battery 6 to supply power, so that the fault monitoring device 2 can continue to upload data, and a worker can know that the AC/DC conversion module 9 fails and timely maintain the fault monitoring device.

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 who possesses fault self-diagnosis function, includes voltage monitor (1), connects AC/DC conversion module (9) between electric wire netting circuit and voltage monitor (1), voltage monitor (1) includes first processing module (11) and first communication module (12), its characterized in that: the monitoring system also comprises a fault monitoring device (2), wherein the fault monitoring device (2) comprises a second processing module (21), a second communication module (22), a first monitoring module (23), a second monitoring module (24) and an antenna, the first monitoring module (23) is used for monitoring whether the power supply of the AC/DC conversion module (9) to the voltage monitor (1) is normally output and outputting a corresponding first monitoring signal, the second monitoring module (24) is used for monitoring whether the first processing module (11) outputs normal and outputting a corresponding second monitoring signal, the second processing module (21) is used for receiving the first monitoring signal and the second monitoring signal and transmitting the first monitoring signal and the second monitoring signal to the second communication module (22), the second communication module (22) sends out the first monitoring signal and the second monitoring signal through the antenna.

2. The voltage monitoring device with the fault self-diagnosis function according to claim 1, wherein: and a lightning protection module (4) for protecting the AC/DC conversion circuit is arranged between the AC/DC conversion circuit and the power grid circuit.

3. The voltage monitoring device with the fault self-diagnosis function according to claim 2, wherein: the lightning protection device is characterized by further comprising a state display module (5), wherein the state display module (5) is coupled to the lightning protection module (4) and is used for monitoring whether the lightning protection module (4) breaks down or not.

4. The voltage monitoring device with the fault self-diagnosis function according to claim 1, wherein: the display device further comprises a liquid crystal display screen (3), and the output ends of the first processing module (11) and the second processing module (21) are coupled to the input end of the liquid crystal display screen (3).

5. The voltage monitoring device with the fault self-diagnosis function according to claim 1, wherein: the fault monitoring device also comprises a battery (6) and a first selection module (7), wherein the first selection module (7) is used for selecting the battery (6) or the AC/DC conversion module (9) to be electrically connected with the power supply interfaces of other modules in the fault monitoring device (2).

6. The voltage monitoring device with the fault self-diagnosis function according to claim 1, wherein: the antenna comprises an internal antenna (25) and an external antenna (26), the internal antenna (25) and the second communication module (22) are installed on the same circuit board, the external antenna (26) is far away from the second communication module (22), a second selection module (8) is arranged between the antenna and the second communication module (22), and the second selection module (8) is used for selecting the internal antenna (25) or the external antenna (26) to upload signals.

7. The voltage monitoring device with the fault self-diagnosis function according to claim 6, wherein: the second selection module (8) comprises a state monitor (81) and an electromagnetic switch (82), the state monitor (81) is used for monitoring the connection condition of the external antenna (26) and outputting a corresponding state signal, and the electromagnetic switch (82) is coupled to the state monitor (81) to receive the state signal and responds to the state signal to communicate the second communication module (22) and the internal antenna (25).