CN220171172U - Novel low-voltage distribution network feeder monitoring device - Google Patents
Novel low-voltage distribution network feeder monitoring device Download PDFInfo
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- CN220171172U CN220171172U CN202321629480.9U CN202321629480U CN220171172U CN 220171172 U CN220171172 U CN 220171172U CN 202321629480 U CN202321629480 U CN 202321629480U CN 220171172 U CN220171172 U CN 220171172U
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Abstract
The utility model provides a novel feeder line monitoring device for a low-voltage distribution network, which comprises the following components: the system comprises a communication module, a monitoring module and a current transformer module; the number of the monitoring modules is equal to that of the current transformer modules; the number of the current transformer modules is equal to the number of cabinet switches in the low-voltage power distribution cabinet; each monitoring module is connected with an access port of the corresponding current transformer module; three-phase wires of the cabinet switch respectively pass through mutual inductance coils of the current mutual inductance module; the communication module is connected with the communication port of each monitoring module, and the communication module is also connected with the fusion terminal in a communication way. According to the utility model, the three-phase current of the cable in the low-voltage power distribution cabinet is induced by the current transformer, and is uploaded to the fusion terminal through the communication module, so that the guarantee is provided for improving the monitoring real-time performance of the low-voltage power distribution network. The utility model supports uninterrupted installation, and the device adopts guide rail type installation and is simple to operate.
Description
Technical Field
The utility model belongs to the technical field of monitoring of power distribution cabinets, and particularly relates to a novel feeder monitoring device for a low-voltage power distribution network.
Background
The rated current of the low-voltage power distribution cabinet is 50Hz, and a power distribution system with the rated voltage of 380v is used as power, and the power conversion and control of illumination and power distribution are realized.
The method for monitoring the low-voltage power distribution cabinet in the prior art comprises the following steps: installing a sensor for real-time monitoring: by installing the sensor on the low-voltage distribution network feeder, parameters such as current, voltage and the like are monitored in real time so as to identify faults or abnormal conditions. Installing a smart electric meter for monitoring: by installing the intelligent ammeter on the low-voltage distribution network feed line, parameters such as electric quantity, power and the like are monitored in real time so as to judge power load change and possible faults. Mounting a fault indicator for monitoring: by installing the fault indicator on the low-voltage distribution network feeder, the fault indicator can quickly alarm and inform maintenance personnel when faults occur. The prior art therefore has disadvantages including: the feeder line of the distribution network is long, and the installation of the monitoring sensor needs to cover the whole line, so that higher cost is caused; the accuracy of the sensor is influenced by factors such as environment, weather and the like, and false alarms are easy to generate; the ammeter can only monitor basic parameters such as electric quantity and power and can not provide more detailed fault information; the fault indicator can only give an alarm after the fault occurs, and cannot provide an early warning function. The information contact among the detection units is less, and the early warning and recovery functions cannot be realized by the cascade intercommunication through centralized processing after the information is summarized by a central system; the power supply of each unit and the communication hardware link may be incompatible, and the repeated laying of lines can occur to the same function, so that the resource waste cost is increased; and meanwhile, the method is difficult to maintain due to low compatibility.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a novel feeder line monitoring device for a low-voltage distribution network. The three-phase current monitoring device is used for monitoring the three-phase current of the cable in the low-voltage power distribution cabinet and provides guarantee for improving the monitoring instantaneity of the low-voltage power distribution network.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
novel low voltage distribution network feeder monitoring device includes: the system comprises a communication module, a monitoring module and a current transformer module;
the number of the monitoring modules is equal to that of the current transformer modules; the number of the current transformer modules is equal to the number of cabinet switches in the low-voltage power distribution cabinet;
each monitoring module is connected with an access port of the corresponding current transformer module; three-phase wires of the cabinet switch respectively pass through mutual inductance coils of the current mutual inductance module; the communication module is connected with the communication port of each monitoring module.
Further, the device also comprises a power supply module; the sampling output port of the power supply module is connected with the sampling input port of each monitoring module.
Further, a power output port of the power module is connected with a power input port of each monitoring module.
Further, a power output port of the power module is connected with a power input port of any monitoring module; all the monitoring modules are connected in cascade.
Furthermore, the communication module is also in communication connection with the fusion terminal.
Further, the monitoring module adopts an HC32F460 chip.
Further, each monitoring module is connected with the access port of the corresponding current transformer module specifically as follows: each monitoring module is connected with an RJ 11P 6C connector of the corresponding current transformer module.
Further, the device is installed in a low-voltage power distribution cabinet.
Further, the device is mounted on the U-shaped guide rail through a bottom buckle.
The effects provided in the summary of the utility model are merely effects of embodiments, not all effects of the utility model, and one of the above technical solutions has the following advantages or beneficial effects:
the utility model provides a novel feeder line monitoring device for a low-voltage distribution network, which comprises the following components: the system comprises a communication module, a monitoring module and a current transformer module; the number of the monitoring modules is equal to that of the current transformer modules; the number of the current transformer modules is equal to the number of cabinet switches in the low-voltage power distribution cabinet; each monitoring module is connected with an access port of the corresponding current transformer module; three-phase wires of the cabinet switch respectively pass through mutual inductance coils of the current mutual inductance module; the communication module is connected with the communication port of each monitoring module. According to the utility model, the three-phase current of the cable in the low-voltage power distribution cabinet is induced by the current transformer, and is uploaded to the fusion terminal through the communication module, so that the guarantee is provided for improving the monitoring real-time performance of the low-voltage power distribution network.
The utility model adopts independent communication modules, the communication modules are numerous, the monitoring modules or the intelligent switches with various communication interfaces provide a communication gateway function, the communication between the upper communication interface and the fusion terminal is unified, and the communication interfaces are favorable for forming standard unified upper communication interfaces, thereby shielding the difference of the communication interfaces of various terminal devices and reducing the development workload and the debugging difficulty of the interface adaptation of the fusion terminal.
The built-in power supply module provides needed power for a plurality of monitoring modules, and the power supply module converts the three-phase voltage strong electric signal AC220V into the weak electric signal AC 2V to provide uniform voltage sampling signals for all the monitoring modules. The utility model can save cost by multiplexing and is beneficial to realizing the miniaturization of the monitoring module.
The utility model supports uninterrupted installation, and the device adopts guide rail type installation and is simple to operate.
Drawings
Fig. 1 is a perspective view of a novel feeder monitoring device for a low-voltage distribution network according to embodiment 1 of the present utility model;
fig. 2 is a schematic diagram of connection between a power module and a monitoring module in a novel low-voltage distribution network feeder line monitoring device according to embodiment 1 of the present utility model when the power module and the monitoring module are directly connected;
fig. 3 is a schematic structural diagram of a current transformer module according to embodiment 1 of the present utility model;
fig. 4 is a schematic connection diagram of a novel low-voltage distribution network feeder line monitoring device according to embodiment 2 of the present utility model when monitoring modules are cascaded.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present utility model will be described in detail below with reference to the following detailed description and the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted so as to not unnecessarily obscure the present utility model.
Example 1
The embodiment 1 of the utility model provides a novel low-voltage distribution network feeder monitoring device, and as shown in fig. 1, a perspective view of the novel low-voltage distribution network feeder monitoring device provided by the embodiment 1 of the utility model is provided; the device is installed in low-voltage distribution cabinet, installs on 35mm U type guide rail through bottom buckle. The device comprises a communication module, a monitoring module and a current transformer module;
the number of the monitoring modules is equal to that of the current transformer modules; the number of the current transformer modules is equal to the number of cabinet switches in the low-voltage power distribution cabinet; the monitoring modules are 1 or more, and each monitoring module comprises a first monitoring module, a second monitoring module and an N monitoring module. The current transformer module comprises a first current transformer module, a second current transformer module and an N current transformer module.
Each monitoring module is connected with an access port of the corresponding current transformer module; three-phase wires of the cabinet switch respectively pass through mutual inductance coils of the current mutual inductance module; the communication module is connected with the communication port of each monitoring module.
In fig. 1, the low-voltage monitoring unit is a monitoring module; the low-voltage communication unit is a communication module.
In the utility model, the communication module is also in communication connection with the fusion terminal, and the communication module is used for collecting information of the multipath monitoring modules. The communication module communicates with the fusion terminal through wireless communication on the pair, and performs method data interaction with at most 64 monitoring modules through a high-speed CAN bus on the pair. Each power distribution cabinet can be provided with a communication module, and a plurality of power distribution cabinets can share one communication module.
In addition, the communication module is also provided with a reset button and a 485 interface for communication or upgrading. The communication module is provided with a Bluetooth interface, and the communication module and the accessed monitoring module can be configured, maintained or upgraded on site through the handheld terminal. The communication module and the monitoring module both reserve an RS485 interface and can be used as a local maintenance or a downward communication interface.
Fig. 2 is a schematic diagram of connection between a power module and a monitoring module in a novel low-voltage distribution network feeder line monitoring device according to embodiment 1 of the present utility model when the power module and the monitoring module are directly connected;
the device also comprises a power supply module; the sampling output port of the power supply module is connected with the sampling input port of each monitoring module. The power module is responsible for converting the three-phase voltage strong electric signal AC220V into the weak electric signal AC 2V, and provides unified voltage sampling signals for each monitoring module.
The power output port of the power module is connected with the power input port of each monitoring module; the power module supplies power to each monitoring module, and a power module is arranged in the cabinet to uniformly provide direct current power for the monitoring modules.
The power supply module provides a common DC12V power supply for the plurality of monitoring modules, the built-in super capacitor is used as a backup power supply, and the endurance time is not less than 30 seconds.
The monitoring module adopts an HC32F460 chip.
Fig. 3 is a schematic structural diagram of a current transformer module according to embodiment 1 of the present utility model; the current transformer module adopts a current transformer, a plug of the current transformer adopts an RJ11 6p6c standard connector, and 6 wires of 3 transformers are collected together. The three mutual inductance coils are used for inducing phase A current, phase B current and phase C current of the line. Each phase line passes through a mutual inductance coil, and the sensor current is transmitted to the monitoring module from a plug of the current transformer through mutual inductance.
The current transformers are connected with the monitoring modules through RJ11 6P6C interfaces, each monitoring module is connected with one set of current transformers, and each set of current transformers comprises three transformers for respectively testing ABC phase currents. The mutual inductance module is directly connected with the monitoring module to replace the original connection mode of crimping and needing to be opened circuit-proof, so that potential safety hazards of live working of field construction personnel are eliminated.
According to the novel feeder monitoring device for the low-voltage distribution network disclosed by the embodiment 1 of the utility model, the three-phase current of the cable in the low-voltage distribution cabinet is induced by the current transformer and uploaded to the fusion terminal through the communication module, so that the guarantee is provided for improving the monitoring instantaneity of the low-voltage distribution network.
According to the novel low-voltage distribution network feeder line monitoring device disclosed by the embodiment 1 of the utility model, the power supply module is directly connected with the monitoring module, so that the reliability of the device can be improved.
Example 2
The embodiment 2 of the utility model provides a connection schematic diagram when monitoring modules are cascaded in a novel low-voltage distribution network feeder line monitoring device, which is arranged in a low-voltage distribution cabinet and is arranged on a 35mm U-shaped guide rail through a bottom buckle. The device comprises a communication module, a monitoring module and a current transformer module;
the number of the monitoring modules is equal to that of the current transformer modules; the number of the current transformer modules is equal to the number of cabinet switches in the low-voltage power distribution cabinet; the monitoring modules are 1 or more, and each monitoring module comprises a first monitoring module, a second monitoring module and an N monitoring module. The current transformer module comprises a first current transformer module, a second current transformer module and an N current transformer module.
Each monitoring module is connected with an access port of the corresponding current transformer module; three-phase wires of the cabinet switch respectively pass through mutual inductance coils of the current mutual inductance module; the communication module is connected with the communication port of each monitoring module.
In the utility model, the communication module is also in communication connection with the fusion terminal, and the communication module is used for collecting information of the multipath monitoring modules. The communication module communicates with the fusion terminal through wireless communication on the pair, and performs method data interaction with at most 64 monitoring modules through a high-speed CAN bus on the pair. Each power distribution cabinet can be provided with a communication module, and a plurality of power distribution cabinets can share one communication module.
In addition, the communication module is also provided with a reset button and a 485 interface for communication or upgrading. The communication module is provided with a Bluetooth interface, and the communication module and the accessed monitoring module can be configured, maintained or upgraded on site through the handheld terminal. The communication module and the monitoring module both reserve an RS485 interface and can be used as a local maintenance or a downward communication interface.
Fig. 4 is a schematic connection diagram of a novel low-voltage distribution network feeder line monitoring device according to embodiment 2 of the present utility model when monitoring modules are cascaded. The power output port of the power module is connected with the power input port of any monitoring module; all the monitoring modules are connected in cascade.
And the power supply module uniformly provides direct current power for the monitoring module. The power module and the plurality of monitoring modules are spliced in a cascading mode so as to flexibly adapt to the change of the number of the monitoring modules.
The power supply module provides a common DC12V power supply for the plurality of monitoring modules, the built-in super capacitor is used as a backup power supply, and the endurance time is not less than 30 seconds.
The monitoring module adopts an HC32F460 chip.
The current transformer module adopts a current transformer, a plug of the current transformer adopts an RJ11 6p6c standard connector, and 6 wires of 3 transformers are collected together. The three mutual inductance coils are used for inducing phase A current, phase B current and phase C current of the line. Each phase line passes through a mutual inductance coil, and the sensor current is transmitted to the monitoring module from a plug of the current transformer through mutual inductance.
The current transformers are connected with the monitoring modules through RJ11 6P6C interfaces, each monitoring module is connected with one set of current transformers, and each set of current transformers comprises three transformers for respectively testing ABC phase currents. The mutual inductance module is directly connected with the monitoring module to replace the original connection mode of crimping and needing to be opened circuit-proof, so that potential safety hazards of live working of field construction personnel are eliminated.
According to the novel low-voltage distribution network feeder line monitoring device disclosed by the embodiment 2 of the utility model, the three-phase current of the cable in the low-voltage distribution cabinet is induced through the current transformer, and the three-phase current is uploaded to the fusion terminal through the communication module, so that the guarantee is provided for improving the monitoring instantaneity of the low-voltage distribution network.
According to the novel low-voltage distribution network feeder line monitoring device disclosed by the embodiment 2 of the utility model, the power supply module and the plurality of monitoring modules are spliced in a cascading mode so as to flexibly adapt to the change of the number of the monitoring modules.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is inherent to. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. In addition, the parts of the above technical solutions provided in the embodiments of the present utility model, which are consistent with the implementation principles of the corresponding technical solutions in the prior art, are not described in detail, so that redundant descriptions are avoided.
While the specific embodiments of the present utility model have been described above with reference to the drawings, the scope of the present utility model is not limited thereto. Other modifications and variations to the present utility model will be apparent to those of skill in the art upon review of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. On the basis of the technical scheme of the utility model, various modifications or variations which can be made by the person skilled in the art without the need of creative efforts are still within the protection scope of the utility model.
Claims (9)
1. Novel low voltage distribution network feeder monitoring device, characterized by comprising: the system comprises a communication module, a monitoring module and a current transformer module;
the number of the monitoring modules is equal to that of the current transformer modules; the number of the current transformer modules is equal to the number of cabinet switches in the low-voltage power distribution cabinet;
each monitoring module is connected with an access port of the corresponding current transformer module; three-phase wires of the cabinet switch respectively pass through mutual inductance coils of the current mutual inductance module; the communication module is connected with the communication port of each monitoring module.
2. A novel low voltage distribution network feeder line monitoring device as claimed in claim 1, wherein the device further comprises a power module; the sampling output port of the power supply module is connected with the sampling input port of each monitoring module.
3. A novel low voltage distribution network feeder line monitoring device according to claim 2, wherein the power output port of the power module is connected to the power input port of each monitoring module.
4. The novel low-voltage distribution network feeder line monitoring device according to claim 2, wherein a power output port of the power module is connected with a power input port of any monitoring module; all the monitoring modules are connected in cascade.
5. The novel low-voltage distribution network feeder line monitoring device according to claim 1, wherein the communication module is further in communication connection with the fusion terminal.
6. The novel low-voltage distribution network feeder line monitoring device according to claim 1, wherein the monitoring module adopts an HC32F460 chip.
7. The novel feeder line monitoring device for low-voltage distribution network according to claim 1, wherein each monitoring module is connected with the access port of the corresponding current transformer module specifically comprises: each monitoring module is connected with an RJ 11P 6C connector of the corresponding current transformer module.
8. A novel low voltage distribution network feeder monitoring device according to any one of claims 1 to 7, wherein the device is installed in a low voltage distribution cabinet.
9. The novel low-voltage distribution network feeder monitoring device according to claim 8, wherein the device is mounted on the U-shaped guide rail through a bottom buckle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321629480.9U CN220171172U (en) | 2023-06-26 | 2023-06-26 | Novel low-voltage distribution network feeder monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321629480.9U CN220171172U (en) | 2023-06-26 | 2023-06-26 | Novel low-voltage distribution network feeder monitoring device |
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| CN220171172U true CN220171172U (en) | 2023-12-12 |
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| CN202321629480.9U Active CN220171172U (en) | 2023-06-26 | 2023-06-26 | Novel low-voltage distribution network feeder monitoring device |
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- 2023-06-26 CN CN202321629480.9U patent/CN220171172U/en active Active
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