CN110491111B - Built-in communication storehouse is directly adopted to smart electric meter based on wireless private network of 230MHz electric power - Google Patents
Built-in communication storehouse is directly adopted to smart electric meter based on wireless private network of 230MHz electric power Download PDFInfo
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- CN110491111B CN110491111B CN201910670177.5A CN201910670177A CN110491111B CN 110491111 B CN110491111 B CN 110491111B CN 201910670177 A CN201910670177 A CN 201910670177A CN 110491111 B CN110491111 B CN 110491111B
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/544—Setting up communications; Call and signalling arrangements
Abstract
The invention discloses a built-in communication cabin for direct collection of an intelligent electric meter based on a 230MHz electric power wireless private network, and relates to a communication cabin of an electric energy meter. At present, a built-in communication cabin is mainly used for local communication, data are required to be forwarded to a service master station through a concentrator after being collected, the network structure is complex, required network equipment is more, the network safety is poor, and the timeliness cannot be guaranteed. The invention is arranged in an ammeter and comprises a shell, an antenna module, a main control unit, a power module, a communication module, a carrier module and a safety chip module, wherein the main control unit, the power module, the communication module, the carrier module and the safety chip module are arranged in the shell; according to the technical scheme, the 230MHz power wireless private network is directly connected with a service master station without adopting a concentrator for forwarding, intermediate links are reduced, the data acquisition efficiency is improved, and a network structure is flattened; by adopting the annular identification technology combining carrier communication and a wireless private network, the unidirectional carrier communication reduces the carrier interference and improves the data identification rate; after the carrier communication is finished, the module enters a dormant state, so that the energy consumption is reduced, and the line loss is reduced.
Description
Technical Field
The invention relates to a communication cabin of an electric energy meter, in particular to a built-in communication cabin for directly collecting an intelligent electric meter based on a 230MHz electric power wireless private network.
Background
At present there is the communication storehouse of two kinds of modes of microgrid or power line carrier based on state net smart electric meter, and network topology is shown in fig. 1, and this communication storehouse is used for local communication, and electric energy electric quantity information acquisition needs to be forwardded through the concentrator, realizes data passback main website, and the collection ring festival is long, and network structure is complicated, and collection efficiency is low, can't realize the management of main website to single ammeter, can't satisfy the demand that state net was used to smart electric meter deepening. The LoRa built-in module applied to the market is mainly used for local communication, the data is required to be forwarded to a service master station through a concentrator after being collected, the network structure is complex, more network devices are required, the network security is poor, and the communication performance is reduced due to multi-layer data transmission; the problems of limited transmission distance, poor anti-interference performance and the like exist when the power line carrier technology is adopted for data transmission. Meanwhile, wireless public network communication is adopted between the concentrator and the master station, so that the transmission safety is poor, and the time efficiency cannot be guaranteed.
Disclosure of Invention
The technical problem to be solved and the technical task to be solved by the invention are to perfect and improve the prior technical scheme, and provide a built-in communication cabin for direct collection of the intelligent electric meter based on a 230MHz electric power wireless private network so as to achieve the purpose of improving the collection efficiency. Therefore, the invention adopts the following technical scheme.
Based on built-in communication storehouse is directly adopted to 230MHz electric power wireless private network smart electric meter, its characterized in that: the intelligent ammeter communication bin is arranged in an ammeter and comprises a shell, an antenna module, a main control unit, a power module, a communication module, a carrier module and a safety chip module, wherein the main control unit, the power module, the communication module, the carrier module and the safety chip module are arranged in the shell; wherein:
a power supply module: the communication module is connected with the main control unit, the carrier module, the safety chip module and supplies low-voltage direct-current power to the main control unit, the carrier module, the communication module and the safety chip module;
a communication module: the main control unit is connected with the main control unit and used for sending the encrypted information sent by the main control unit to the service master station through the antenna so as to realize communication data state interaction;
a carrier module: the main control unit is connected with the transformer side station area phase transmitting device and used for receiving communication data of the transformer side station area phase transmitting device and transmitting the data to the main control unit; after receiving a state activation command sent by the main control unit, the carrier module is switched from a dormant state to a working state, starts to receive communication data of the transformer side transformer area phase sending device and transmits the data to the main control unit; after receiving a sleep command sent by the main control unit, the carrier module enters a sleep state;
an antenna module: the main control unit is connected with the main control unit and is communicated with a 230MHz electric power wireless private network based on a coupling mode;
a security chip module: the system is connected with the main control unit and used for encrypting the information sent by the main control unit by a service layer;
the main control unit: the communication module is connected with the carrier module, the communication module and the safety chip module; the main control unit comprises an acquisition module, a transformer area identification module and a power failure reporting module; the acquisition module is used for acquiring acquisition information through the service acquisition interface after receiving a data acquisition command sent by the service master station, sending the acquisition information to the encryption chip for data encryption, and sending the encrypted acquisition information to the communication module; the transformer area identification module is used for detecting current transformer area information after equipment is powered on, controlling the carrier module to enter a working state, enabling the carrier module to receive transformer area phase information data of a transformer side transformer area phase sending device, performing integrity confirmation after the data is received, comparing the integrity confirmation with originally stored data, locally storing the current transformer area phase information and sending the current transformer area phase information to the encryption chip for data encryption when the data is different, sending the encrypted transformer area information to the communication module, and then controlling the carrier module to enter a dormant state; and the power failure and restoration reporting module is used for sending the power failure and restoration information to the encryption chip for data encryption after detecting the power failure and restoration information of the power grid, and sending the encrypted power failure and restoration information to the communication module.
According to the technical scheme, the 230MHz power wireless private network is adopted, a concentrator is not required to be adopted for forwarding, the wireless private network is directly connected with a service master station, intermediate links are reduced, data acquisition efficiency is improved, and a network structure is flattened.
The station area phase identification is different from the existing bidirectional carrier communication mode, and the unidirectional carrier communication reduces the carrier interference and improves the data identification rate by adopting the annular identification technology combining the carrier communication and the wireless private network; after the carrier communication is finished, the module enters a dormant state, so that the energy consumption is reduced, and the line loss is reduced.
As a preferable technical means: the communication module is a pluggable communication module so as to adapt to IoT-G230 and LTE-G230 standards by replacing the communication module. The communication cabin is compatible with IoT-G230 and LTE-G230 systems through a pluggable communication module, and the universality is improved.
As a preferable technical means: the power supply module comprises a 12V power supply submodule and a backup power supply submodule; when the power supply is normal, the power supply is supplied by the 12V power supply submodule; when the power is cut off, the backup power supply submodule supplies power temporarily to report a short-time power-off event, and comprises a plurality of series capacitors. A backup power supply is arranged in the communication cabin, and when power is cut off, the function of reporting a short-time power-off event is realized.
As a preferable technical means: the shell is provided with an ammeter data interface, a 12V power interface and a 220V power line interface; the electric meter data interface is connected with the main control unit through a service acquisition interface circuit so as to transmit electric meter data to the main control unit; the 12V power interface is connected with the power module to supply power; the 220V power line interface is connected with the carrier module to obtain information sent by the transformer side transformer area phase sending device.
As a preferable technical means: the shell is square and comprises an upper shell and a lower shell, a first PCB, a second PCB and a third PCB are arranged in the shell, the positions below, in the middle and above the first PCB, the second PCB and the third PCB are superposed, and a carrier module and a power module are arranged on the first PCB; the second PCB board is provided with a main control unit and a safety chip module; the third PCB is provided with a communication module; the inner wall of the shell is provided with a metal sheet connected with the communication module. The first PCB, the second PCB and the third PCB are superposed, so that the space is fully utilized, and multifunctional integration is realized on the basis of not increasing the inner cavity of the shell. The first PCB, the second PCB and the third PCB can be positioned and communicated through the contact pins, and the PCB is high in reliability and compact in structure.
As a preferable technical means: the third PCB is arranged on the second PCB in an inserting mode; or the third PCB is fixedly connected to the second PCB, and the second PCB is arranged on the first PCB in an inserting mode. The third PCB board is convenient to replace, the cost is reduced, and the use is flexible.
As a preferable technical means: the third PCB and the second PCB are smaller than the first PCB in size. The up-and-down superposition of multiple plates is effectively realized.
As a preferable technical means: one corner of the first PCB is provided with 5 capacitors, the 5 capacitors are arranged in two rows, 3 capacitors are positioned on the outer side, 2 capacitors are positioned on the inner side of the 3 capacitors, and the capacitors are 2.7V 2F capacitors; the third PCB and the second PCB are positioned on one side of the capacitor to avoid the capacitor. The space is fully utilized, a plurality of capacitors are connected in series to form an important component of the backup power supply, and 5 capacitors fully utilize the space. If single electric capacity is big, then bulky, the scheduling problem can appear assembling not down, under the prerequisite of guaranteeing the electric capacity, if single electric capacity is little, then need be greater than 5 electricity, also can appear occupying PCB face board oversize, lead to the problem that other modules can not set up.
As a preferable technical means: the first PCB is provided with an ammeter data interface, a 12V power interface and a 220V power line interface; and the first PCB is provided with a separation groove to separate strong current from weak current.
As a preferable technical means: the first PCB board still be equipped with zero cross detection circuit, the carrier wave module include: the system comprises a carrier coupling circuit, a carrier receiving and filtering circuit, a carrier modulation and demodulation chip and a carrier sending circuit; and the first PCB board at the position of the carrier coupling circuit is provided with a separation groove.
Has the advantages that:
the communication bin of the technical scheme is directly connected with a service master station through a 230MHz electric power wireless private network without adopting a concentrator for forwarding, so that intermediate links are reduced, the data acquisition efficiency is improved, the network structure is flattened, the data acquisition frequency is improved, and the fine management is realized.
And secondly, the communication cabin is compatible with IoT-G230 and LTE-G230 systems through a pluggable communication module, so that the universality is improved.
The station area phase identification is different from the existing bidirectional carrier communication mode, and a ring identification technology combining carrier communication and a wireless private network is adopted, so that the carrier interference is reduced by unidirectional carrier communication, and the data identification rate is improved; after the carrier communication is finished, the module enters a dormant state, so that the energy consumption is reduced, and the line loss is reduced.
And fourthly, a backup power supply is arranged in the communication cabin, and when power is cut off, the function of reporting the short-time power-off event is realized.
Drawings
Fig. 1 is a network topology diagram of a conventional microgrid and power line carrier communication cabin.
Fig. 2 is a schematic diagram of the present invention.
Fig. 3 is a schematic structural diagram of the present invention.
In the figure: 1. a housing; 101. an upper housing; 102. a lower housing; 2. A first PCB board; 3. a second PCB board; 4. A third PCB board; 5. and (4) a capacitor.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the drawings in the specification.
The smart electric meter communication bin is arranged in an electric meter, and comprises a shell 1, an antenna module, a main control unit, a power supply module, a communication module, a carrier module and a safety chip module, wherein the main control unit, the power supply module, the communication module, the carrier module and the safety chip module are arranged in the shell 1, as shown in fig. 2 and 3; wherein:
a power supply module: the communication module is connected with the main control unit, the carrier module, the safety chip module and supplies low-voltage direct-current power to the main control unit, the carrier module, the communication module and the safety chip module;
a communication module: the main control unit is connected with the main control unit and used for sending the encrypted information sent by the main control unit to the service master station through the antenna so as to realize communication data state interaction;
a carrier module: the main control unit is connected with the transformer side station area phase transmitting device and used for receiving communication data of the transformer side station area phase transmitting device and transmitting the data to the main control unit; after receiving a state activation command sent by the main control unit, the carrier module is switched from a dormant state to a working state, starts to receive communication data of the transformer side transformer area phase sending device and transmits the data to the main control unit; after receiving a sleep command sent by the main control unit, the carrier module enters a sleep state;
an antenna module: the main control unit is connected with the main control unit and is communicated with a 230MHz electric power wireless private network based on a coupling mode;
a security chip module: the system is connected with the main control unit and used for encrypting the information sent by the main control unit by a service layer;
the main control unit: the communication module is connected with the carrier module, the communication module and the safety chip module; the main control unit comprises an acquisition module, a transformer area identification module and a power failure reporting module; the acquisition module is used for acquiring acquisition information through the service acquisition interface after receiving a data acquisition command sent by the service master station, sending the acquisition information to the encryption chip for data encryption, and sending the encrypted acquisition information to the communication module; the transformer area identification module is used for detecting current transformer area information after equipment is powered on, controlling the carrier module to enter a working state, enabling the carrier module to receive transformer area phase information data of a transformer side transformer area phase sending device, performing integrity confirmation after the data is received, comparing the integrity confirmation with originally stored data, locally storing the current transformer area phase information and sending the current transformer area phase information to the encryption chip for data encryption when the data is different, sending the encrypted transformer area information to the communication module, and then controlling the carrier module to enter a dormant state; and the power failure and restoration reporting module is used for sending the power failure and restoration information to the encryption chip for data encryption after detecting the power failure and restoration information of the power grid, and sending the encrypted power failure and restoration information to the communication module.
According to the technical scheme, the 230MHz power wireless private network is adopted, a concentrator is not required to be adopted for forwarding, the wireless private network is directly connected with a service master station, intermediate links are reduced, data acquisition efficiency is improved, and a network structure is flattened.
The station area phase identification is different from the existing bidirectional carrier communication mode, and the unidirectional carrier communication reduces the carrier interference and improves the data identification rate by adopting the annular identification technology combining the carrier communication and the wireless private network; after the carrier communication is finished, the module enters a dormant state, so that the energy consumption is reduced, and the line loss is reduced.
In order to improve the universality and reduce the cost, the communication module is a pluggable communication module so as to adapt to IoT-G230 and LTE-G230 modes by replacing the communication module. The communication cabin is compatible with IoT-G230 and LTE-G230 systems through a pluggable communication module, and the universality is improved.
In order to realize the report of the short-time power-off event, the power supply module comprises a 12V power supply submodule and a backup power supply submodule; when the power supply is normal, the power supply is supplied by the 12V power supply submodule; when the power is cut off, the backup power supply submodule supplies power temporarily to report a short-time power-off event, and comprises a plurality of series capacitors 5. A backup power supply is arranged in the communication cabin, and when power is cut off, the function of reporting a short-time power-off event is realized.
In order to be conveniently and reliably connected with the electric energy meter, the shell 1 is provided with an electric meter data interface, a 12V power interface and a 220V power line interface; the electric meter data interface is connected with the main control unit through a service acquisition interface circuit so as to transmit electric meter data to the main control unit; the 12V power interface is connected with the power module to supply power; the 220V power line interface is connected with the carrier module to obtain information sent by the transformer side transformer area phase sending device.
In order to realize the integrated installation of multiple modules, the shell 1 is square, a notch which is convenient to take and place is arranged on the shell 1 to be used as a handheld part, the shell 1 comprises an upper shell 101 and a lower shell 102, a first PCB 2, a second PCB 3 and a third PCB 4 are arranged in the shell 1, the positions below, in the middle and above the first PCB 2, the second PCB 3 and the third PCB 4 are superposed, and a carrier module and a power module are arranged on the first PCB 2; the second PCB 3 is provided with a main control unit and a safety chip module; the third PCB 4 is provided with a communication module; the inner wall of the housing 1 is provided with a metal sheet connected with the communication module. The first PCB board 2, the second PCB board 3 and the third PCB board 4 are superposed, so that the space is fully utilized, and on the basis of not increasing the inner cavity of the shell 1, multifunctional integration is realized. The first PCB board 2, the second PCB board 3 and the third PCB board 4 can be positioned and communicated through the contact pins, and the PCB is high in reliability and compact in structure.
To improve the flexibility of use and to reduce costs. The third PCB 4 is arranged on the second PCB 3 in a plugging way; or the third PCB 4 is fixedly connected to the second PCB 3, and the second PCB 3 is arranged on the first PCB 2 in an inserting mode. The third PCB 4 is convenient to replace, the cost is reduced, and the use is flexible.
The third PCB 4 and the second PCB 3 are smaller than the first PCB 2. The upper and lower superpose of many boards is effectively realized to the handheld portion is effectively avoided.
In order to fully utilize the limited space, 5 capacitors 5 are arranged at one corner of the first PCB 2, the 5 capacitors 5 are arranged in two rows, 3 capacitors 5 are positioned at the outer side, 2 capacitors 5 are positioned at the inner side of the 3 capacitors 5, and the capacitors 5 are 2.7V 2F capacitors 5; the third PCB 4 and the second PCB 3 are located at one side of the capacitor 5 to avoid the capacitor 5. The space is fully utilized, a plurality of capacitors 5 are connected in series to form an important component of the backup power supply, and the 5 capacitors 5 fully utilize the space. If single electric capacity 5 is capacious, then bulky, the scheduling problem can appear assembling not down, under the prerequisite of guaranteeing 5 volumes of electric capacity, if single electric capacity 5 volume is little, then need be greater than 5 electricity, also can appear occupying PCB face board too big, lead to the problem that other modules can not set up.
In order to improve the working reliability and avoid interference, the first PCB 2 is provided with an ammeter data interface, a 12V power interface and a 220V power line interface; the first PCB 2 is formed with a spacer to isolate strong current from weak current.
In order to realize the collection of multidata and reduce mutual interference, this first PCB 2 still is equipped with zero cross detection circuit, and this carrier module includes: the system comprises a carrier coupling circuit, a carrier receiving and filtering circuit, a carrier modulation and demodulation chip and a carrier sending circuit; the first PCB 2 where the carrier coupling circuit is arranged is provided with a separation groove. The strong current is basically arranged on the first PCB 2 and is separated from the communication module positioned on the third PCB 4, which is beneficial to improving the working stability.
The direct-acquisition built-in communication cabin of the smart meter based on the 230MHz power wireless private network shown in fig. 2-3 is a specific embodiment of the present invention, has embodied substantial features and advances of the present invention, and can be modified equivalently in shape, structure and the like according to practical use requirements and under the teaching of the present invention, which are within the scope of protection of the present solution.
Claims (9)
1. Based on built-in communication storehouse is directly adopted to 230MHz electric power wireless private network smart electric meter, its characterized in that: the intelligent ammeter communication bin is arranged in an ammeter and comprises a shell (1), an antenna module, a main control unit, a power supply module, a communication module, a carrier module and a safety chip module, wherein the main control unit, the power supply module, the communication module, the carrier module and the safety chip module are arranged in the shell (1); wherein:
a power supply module: the communication module is connected with the main control unit, the carrier module, the safety chip module and supplies low-voltage direct-current power to the main control unit, the carrier module, the communication module and the safety chip module;
a communication module: the main control unit is connected with the main control unit and used for sending the encrypted information sent by the main control unit to the service master station through the antenna so as to realize communication data state interaction;
a carrier module: the main control unit is connected with the transformer side station area phase transmitting device and used for receiving communication data of the transformer side station area phase transmitting device and transmitting the data to the main control unit; after receiving a state activation command sent by the main control unit, the carrier module is switched from a dormant state to a working state, starts to receive communication data of the transformer side transformer area phase sending device and transmits the data to the main control unit; after receiving a sleep command sent by the main control unit, the carrier module enters a sleep state;
an antenna module: the main control unit is connected with the main control unit and is communicated with a 230MHz electric power wireless private network based on a coupling mode;
a security chip module: the system is connected with the main control unit and used for encrypting the information sent by the main control unit by a service layer;
the main control unit: the communication module is connected with the carrier module, the communication module and the safety chip module; the main control unit comprises an acquisition module, a transformer area identification module and a power failure reporting module; the acquisition module is used for acquiring acquisition information through the service acquisition interface after receiving a data acquisition command sent by the service master station, sending the acquisition information to the encryption chip for data encryption, and sending the encrypted acquisition information to the communication module; the transformer area identification module is used for detecting current transformer area information after equipment is powered on, controlling the carrier module to enter a working state, enabling the carrier module to receive transformer area phase information data of a transformer side transformer area phase sending device, performing integrity confirmation after the data is received, comparing the integrity confirmation with originally stored data, locally storing the current transformer area phase information and sending the current transformer area phase information to the encryption chip for data encryption when the data is different, sending the encrypted transformer area information to the communication module, and then controlling the carrier module to enter a dormant state; the power failure and restoration reporting module is used for sending power failure and restoration information to the encryption chip for data encryption after detecting the power failure and restoration information of the power grid, and sending the encrypted power failure and restoration information to the communication module;
the intelligent electric meter communication bin is directly connected with the service master station through a 230MHz electric power wireless private network, and a concentrator is not needed for forwarding, so that intermediate links are reduced, the data acquisition efficiency is improved, and the network structure is flattened;
the station area phase identification adopts an annular identification mode combining carrier communication and a wireless private network, and the unidirectional carrier communication is used for reducing carrier interference and improving the data identification rate; after the carrier communication is finished, the carrier module enters a dormant state to reduce energy consumption and reduce line loss;
the communication module is a pluggable communication module, so that the communication module can be adapted to IoT-G230 and LTE-G230 systems in a mode of replacing the communication module and is compatible with the IoT-G230 and LTE-G230 systems.
2. The 230 MHz-based wireless private network smart meter direct-sampling built-in communication cabin of claim 1, wherein: the power supply module comprises a 12V power supply submodule and a backup power supply submodule; when the power supply is normal, the power supply is supplied by the 12V power supply submodule; when the power is cut off, the backup power supply submodule supplies power temporarily to report a short-time power-off event, and comprises a plurality of series capacitors (5).
3. The 230 MHz-based wireless private network smart meter direct-sampling built-in communication cabin of claim 1, wherein: an ammeter data interface, a 12V power interface and a 220V power line interface are arranged on the shell (1); the electric meter data interface is connected with the main control unit through a service acquisition interface circuit so as to transmit electric meter data to the main control unit; the 12V power interface is connected with the power module to supply power; the 220V power line interface is connected with the carrier module to obtain information sent by the transformer side transformer area phase sending device.
4. The 230MHz electric power wireless private network-based smart meter direct acquisition built-in communication bin as claimed in any one of claims 1 to 3, wherein: the casing (1) is square and comprises an upper casing (101) and a lower casing (102), a first PCB (2), a second PCB (3) and a third PCB (4) are arranged in the casing (1), the positions below, in and above the first PCB (2), the second PCB (3) and the third PCB (4) are superposed, and a carrier module and a power module are arranged on the first PCB (2); the second PCB (3) is provided with a main control unit and a safety chip module; a communication module is arranged on the third PCB (4); the inner wall of the shell (1) is provided with a metal sheet connected with the communication module.
5. The 230 MHz-based wireless private network smart meter direct-sampling built-in communication cabin of claim 4, wherein: the third PCB (4) is arranged on the second PCB (3) in an inserting way; or the third PCB (4) is fixedly connected to the second PCB (3), and the second PCB (3) is arranged on the first PCB (2) in an inserting mode.
6. The 230 MHz-based wireless private network smart meter direct-sampling built-in communication cabin of claim 5, wherein: the sizes of the third PCB (4) and the second PCB (3) are smaller than that of the first PCB (2).
7. The 230 MHz-based wireless private network smart meter direct-sampling built-in communication cabin of claim 6, wherein: one corner of the first PCB (2) is provided with 5 capacitors (5), the 5 capacitors (5) are arranged in two rows, 3 capacitors (5) are positioned at the outer side, 2 capacitors (5) are positioned at the inner side of the 3 capacitors (5), and the capacitors (5) are 2.7V 2F capacitors (5); and the third PCB (4) and the second PCB (3) are positioned on one side of the capacitor (5) to avoid the capacitor (5).
8. The 230 MHz-based wireless private network smart meter direct-sampling built-in communication cabin of claim 7, wherein: the first PCB (2) is provided with an ammeter data interface, a 12V power interface and a 220V power line interface; and the first PCB (2) is provided with a separation groove to separate strong current from weak current.
9. The 230 MHz-based wireless private network smart meter direct-sampling built-in communication cabin of claim 8, wherein: first PCB board (2) still be equipped with zero cross detection circuit, carrier wave module include: the system comprises a carrier coupling circuit, a carrier receiving and filtering circuit, a carrier modulation and demodulation chip and a carrier sending circuit; the first PCB (2) where the carrier coupling circuit is arranged is provided with a separation groove.
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| CN201910670177.5A CN110491111B (en) | 2019-07-24 | 2019-07-24 | Built-in communication storehouse is directly adopted to smart electric meter based on wireless private network of 230MHz electric power |
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| CN201910670177.5A CN110491111B (en) | 2019-07-24 | 2019-07-24 | Built-in communication storehouse is directly adopted to smart electric meter based on wireless private network of 230MHz electric power |
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| CN112200276B (en) * | 2020-08-21 | 2023-02-24 | 云南电网有限责任公司德宏供电局 | Cloud platform based electric power pointer instrument test equipment management and control system and method |
| CN112769577B (en) * | 2020-12-11 | 2022-07-15 | 山东电工电气集团新能科技有限公司 | Electric power thing networking intelligent communication unit with back-up source |
| CN113784303A (en) * | 2021-09-28 | 2021-12-10 | 广东电网有限责任公司 | Electric power wireless Internet of things system |
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