CN107359698A - A kind of distribution web area intelligent terminal - Google Patents
A kind of distribution web area intelligent terminal Download PDFInfo
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- CN107359698A CN107359698A CN201610305608.4A CN201610305608A CN107359698A CN 107359698 A CN107359698 A CN 107359698A CN 201610305608 A CN201610305608 A CN 201610305608A CN 107359698 A CN107359698 A CN 107359698A
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- H02J13/0017—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The embodiments of the invention provide a kind of distribution web area intelligent terminal, including control chip and uplink communication module；The uplink communication module includes LTE230 modules, Wifi modules, GPRS module, 4G modules and optical communications module；The control chip is used for the power dispatching data for receiving controller switching equipment, and selects different uplink communication modules, sends the power dispatching data to long-range power distribution automation main station.The distribution web area intelligent terminal of the embodiment of the present invention, different zones power distribution communication terminal group network topological structure is adjusted flexibly according to distribution terminal deployed environment, realize different zones, the seamless access of different type distribution terminal, it has been obviously improved various wireless communication access technology composite communication, fiber radio integration access efficiency, reduce and build O＆M cost with network communication system, improve with network communication system comprehensive utilization ratio.
Description
Technical field
The present invention relates to the wireless access technology field of power distribution network, more particularly to a kind of distribution web area intelligent terminal.
Background technology
Because power distribution network terminal node is more, distribution is wide, access is changed frequently, with Network Communication frequently with optical fiber, carrier wave etc.
Communication, causes to exist with network communication system that technical standard is various, networking structure is complicated, transmission performance difference
The problems such as property is larger.Show with network communication system process of construction, wireless communication access has networking flexibility, access
The many advantages such as cost is low, operation maintenance is simple, it is solve the access of a large amount of distribution service terminals and business transmission important
Technology.
Research of the developed countries such as Europe, the U.S., Australia in terms of external self-built radio network technique is carried out with
Product development.Such as：2010, the insertion of WiMAX communication modules was adopted by Canadian Hydro One Utilities Electric Co.s
The power equipment terminal such as storage, concentrator, and carry out networking test under practical circumstances.2011, Americanologist
With electrically being completed jointly based on wireless in Michigan with second largest Utilities Electric Co. of American Electric Power and Michigan
The electricity consumption operational trials of WiMAX technologies.2012, Motorola Inc. and Charles Rangel company were the new energy of Australia
Source network company build the power communication private network based on WiMAX technologies, support business include adapted electric equipment monitoring and
The service applications such as control, power information collection.At present, Italy is developing the power network for possessing GPRS abilitys to communicate
Framework, power transmission situation can be known in real time by each power system monitor node using GPRS technologies.
Self-built wireless network domestic at present is related to polytype, mainly using 230MHz data radio stations, McWiLL,
The technologies such as TD-LTE.Such as the McWiLL systems of Beijing Xin Wei companies exploitation are in Liaoning Electric Power company, Beijing electric power
The Utilities Electric Co.s such as company, Ningxia electric power company have carried out Demonstration Application, and Huawei proposes on WiMAX technical foundation
1.8G systems tested and tested in Zhejiang electric power company, Liaoning Electric Power company, the exploitation of wireless oasis company
EWIN systems complete regional application system in Shandong Electric Power Group company construction, Nan Rui groups are responsible for what research and development were completed
TD-LTE 230MHz novel electric powers Wireless Broadband Communication Systems are in Zhejiang sea salt, Ji Bei great Chang Deng Di Utilities Electric Co.s
Build and complete experimental network.
Above-mentioned technical research and product belong to the small-scale pilot application stage, and there is an urgent need to one kind in market to push away on a large scale
The electric power multi-mode radio communication access product of wide mature and reliable.
The content of the invention
Various wireless communication access technology and controller switching equipment scene access demand, design one be present for power distribution network in the present invention
The new distribution web area intelligent terminal of kind.
In order to achieve the above object, the embodiment of the present invention provides a kind of distribution web area intelligent terminal, including control chip
With uplink communication module；The uplink communication module includes LTE230 modules, Wifi modules, GPRS module, 4G
Module and optical communications module；The control chip is used to receive the power dispatching data of controller switching equipment, and selects different upper
Row communication module, send the power dispatching data to long-range power distribution automation main station.
Further, the control chip is connected to the controller switching equipment by network interface and/or serial ports, realizes that data are handed over
Mutually.
Further, the uplink and downlink communication protocol massages form of the distribution web area intelligent terminal is：Head, main frame
Location, slave addresses, control code, function code, data length, valid data and check code.
Further, the control chip receives the power dispatching data of controller switching equipment, and selects different uplink communication modules,
Including：Detect the current signal strength RSS for the access point that the distribution web area intelligent terminal currently connectscur；Work as institute
State current signal strength RSScurLess than minimum signal strength RSSminWhen, perform scan channel；Carrying out the channel
During scanning, if detecting the current signal strength RSScurMore than maximum signal RSSmax, then stop channel and sweep
Retouch, and using current access point as new wireless communication access point, associated again.
Further, when the current signal strength for detecting access point that the distribution web area intelligent terminal currently connects
RSScurLess than the signal threshold value RSS of settingresWhen, it is not responding to scan channel.
Further, the control chip is Freescale MK60 chips.
Further, the LTE230 modules, Wifi modules are connected by wireless network with public network base station, described
Public network base station is communicated by Ethernet with the long-range power distribution automation main station.
Further, the GPRS module, 4G modules are connected by wireless network with private network base station, described special
Net base station is communicated by Ethernet with the long-range power distribution automation main station.
Further, the optical communications module is by fiber medium and the long-range power distribution automation main station direct communication,
Carry out the transmission of the power dispatching data.
The distribution web area intelligent terminal of the embodiment of the present invention, different zones are adjusted flexibly according to distribution terminal deployed environment
Power distribution communication terminal group network topological structure, different zones, the seamless access of different type distribution terminal are realized, is significantly carried
Various wireless communication access technology composite communication, fiber radio integration access efficiency have been risen, has been reduced with network communication system
O＆M cost is built, is improved with network communication system comprehensive utilization ratio.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present invention, for those skilled in the art, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the distribution web area intelligent terminal of the embodiment of the present invention；
Fig. 2 is the uplink and downlink communication pattern diagram of the distribution web area intelligent terminal of the embodiment of the present invention；
Fig. 3 is the uplink and downlink communication protocol massages form of the distribution web area intelligent terminal of the embodiment of the present invention；
Fig. 4 is the software implementation method flow chart of the control chip of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.
Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
Fig. 1 is the structural representation of the distribution web area intelligent terminal of the embodiment of the present invention.As illustrated, including control
Chip 1 and uplink communication module 2.The uplink communication module 2 include LTE230 modules 21, Wifi modules 22,
GPRS module 23,4G modules 24 and optical communications module 25.
The control chip 1 is used for the power dispatching data for receiving controller switching equipment, and selects different uplink communication modules 2,
Send the power dispatching data to long-range power distribution automation main station.When it is implemented, control chip can select to fly to think card
That MK60 chips.
In the present embodiment, the uplink and downlink communication pattern of distribution web area intelligent terminal is illustrated in fig. 2 shown below, it up
Tetra- kinds of GPRS, 4G, LTE230 radio communication (wireless Mesh netword), Wifi communication patterns are supported in communication,
It is connected by wireless network with public network base station (GPRS, 4G) and private network base station (Wireless Mesh, Wifi),
Public network base station and private network base station are communicated by Ethernet with long-range power distribution automation main station, transmit remote measurement, remote signalling,
Remote-control data.Distribution web area intelligent terminal can be also connected by fiber medium with long-range power distribution automation main station, be completed
The transmission of power dispatching data.
When it is implemented, the LTE230 modules 21, Wifi modules 22 are connected by wireless network with public network base station
Connect, the public network base station is communicated by Ethernet with the long-range power distribution automation main station；The GPRS module
23rd, 4G modules 24 are connected by wireless network with private network base station, the private network base station by Ethernet with it is described remote
Journey power distribution automation main station is communicated；The optical communications module 25 is automatic by fiber medium and the long-range distribution
Change main website direct communication, carry out the transmission of the power dispatching data.
In embodiments of the present invention, the downlink communication of distribution web area intelligent terminal possesses two kinds of network interface, serial ports interfaces,
To realize the data interaction with existing controller switching equipment.When it is implemented, 232 serial ports and RJ network interface forms can be used.
In the present embodiment, as shown in figure 3, the uplink and downlink communication protocol massages form of distribution web area intelligent terminal is：
Head, host address, slave addresses, control code, function code, data length, valid data and check code.Wherein,
The concrete meaning of each section is as follows：
Head is 2 bytes：0x55,0xAA.
Host address is 2 bytes：0xSS, 0x00.First character section SS is host address label, second word
It is immutable to save 0x00 data.
Slave addresses are 2 bytes：0x00, oxTT.Second byte TT is slave addresses label, first character
It is immutable to save 0x00 data.
It is 1 byte that control code, which is four kinds,：0x00 (represents registration), or 0x01 (expression read operation), or
Person 0x02 (expression write operation), or 0x03 (expression is exited).
Function code is 1 byte, and when control code is 0x00 or 0x01, function code difference then represents different implications.
When control code is 0x00, under function code 0x00 represents that the offline search of up machine, function code 0x80 represent
The registration request of row machine；Function code 0x01 represents that the registered address of descending machine, function code are distributed in the transmission of up machine
0x81 represents the registered address that the confirmation of descending machine is distributed；Function code 0x02 represents that the erasing of up machine is distributed to
The registered address of descending machine, function code 0x81 represent that distributed registered address is wiped in the confirmation of descending machine；Function code
0x03 represents up machine from the new descending machine for connecting erased registered address；Function code 0x04 represents up machine from new
Register the descending machine of erased registered address.
When control code is 0x01, function code 0x00 represents the reading description request of up machine, and function code 0x80 is represented
Descending machine confirms to read description request；Function code 0x01 represents that the description that reads or writes of up machine is asked, function code 0x81
Represent that descending machine confirms that the description that reads or writes of up machine is asked；Function code 0x02 represents the up machine-readable survey for removing row machine
Data command is measured, function code 0x81 represents that descending machine sends specific measurement data according to instruction is read；Function code 0x03
Represent that up machine inquires about the address information of descending machine, function code 0x83 represents that descending machine answers up machine inquiry address letter
Breath request.Function code 0x04 represents the configuration information of up machine-readable descending machine, and function code 0x84 represents descending machine response
It is up machine-readable to take configuration information to ask.
Data length is total byte number of valid data, such as valid data have 10 bytes, then data length
Numerical value is 0x10.
Check code is 2 bytes.It uses CRC check method, Ji Jiangtou, host address, slave addresses, control
This several summation that all 16 binary values are added of code processed, function code, data length, valid data.
In embodiments of the present invention, designing new communication protocol message format can realize that different zones, different type are matched somebody with somebody
The seamless access of electric terminals, almost all of controller switching equipment scene access demand can be met.
In the present invention, communication strategy selection is rationally designed, is that can distribution web area intelligent terminal access power distribution network into
One of key link of work(operation.Communication strategy selection gist：Economic rationality, prioritizing selection is wired, LTE230
Power private network carries out data transmission；GPRS, 3G, LTE230 signal quality；Protected by various wireless communication standard
Barrier and background communication.Communication strategy system of selection is：The optimal access way of each node in network is calculated, and will
They are combined into various types of networks, and realize the interconnection between heterogeneous network.
In embodiments of the present invention, the control chip 1 receives the power dispatching data of controller switching equipment, and selects different upper
Row communication module, is specifically included：The current signal strength RSS for the access point that detection intelligent terminal currently connects firstcur；
As the current signal strength RSScurLess than minimum signal strength RSSminWhen, perform scan channel；Progress described in
During scan channel, if detecting signal intensity RSScurMore than maximum signal RSSmax, then stop scan channel,
And using current access point as new wireless communication access point, associated again.Wherein, when detecting intelligent terminal
The current signal strength RSS of the access point currently connectedcurLess than the signal threshold value RSS of settingresWhen, it is not responding to channel
Scanning, this does unnecessary probe response also for preventing distribution web area intelligent terminal.
That is, its Computing Principle is：Define four signal intensities：RSScur, RSSmin, RSSmax, RSSres。
RSScurRepresent the access point signals intensity that distribution web area intelligent terminal currently connects, RSSminRepresent the distribution of setting
The minimum signal intensity of web area intelligent terminal access, RSSmaxRepresent the distribution web area intelligent terminal access of setting
Maximum signal intensity, RSSresRepresent the cutoff threshold of the distribution web area intelligent terminal access of setting.
When detecting RSScur<RSSminShi Zhihang scan channels；If detect that signal intensity is big in channel scan phase
In RSSmaxThen stop scanning, in this, as new wireless communication access point.For example, the data of controller switching equipment are first
Selecting Wifi passages, if now detecting, the signal intensity of this access point is less than RSS as access pointminWhen, then enter
Row scan channel, if in sweep phase, detect that the signal intensity of the access point of 4G passages is more than RSSmaxThen stop
Only scan, by 4G passages as new access point, that is, select 4G module transfer power dispatching datas.
Fig. 4 is the software implementation method flow chart of the control chip of the embodiment of the present invention.As shown in figure 4, including：
Step S401, initialize serial ports and RTC, flash.It is if first first using MK60FN1M0 circuit boards
Its 6 serial ports of beginningization, clock module and storage flash module.
Step S402, the registration request message of serial ports 0 is sent to controller switching equipment；
Step S403, after controller switching equipment receives the registration request message of serial ports 0, registered, and registration is believed
Breath returns to serial ports 0, that is, receives the return log-on message of serial ports 0；
Step S404, judgement register whether error；If error, is back to step S402, resends serial ports 0
Registration request message to controller switching equipment, if do not malfunctioned, carry out step S405；
Step S405, read the parameter species message of controller switching equipment.Such message includes temperature, switching value, mutual inductance
The parameter informations such as device voltage, electric current；
Step S406, after reading message, carry out parameter species index and the numerical value of each parameter；
Step S407, a parameter values is stored into flash；
Step S408, send serial ports 1-5 registration request message；
Step S409, receive serial ports 1-5 return log-on message；
Step S410, judgement register whether error, if error, is back to step S408, resends serial ports 1-5
Registration request message to controller switching equipment, if do not malfunctioned, carry out step S411；
Step S411, by each parameter real time data, that the historical data being stored in flash is sent to long-range distribution is automatic
Change main website.
It can be obtained by above example, the distribution web area intelligent terminal of the embodiment of the present invention, according to distribution terminal
Different zones power distribution communication terminal group network topological structure is adjusted flexibly in deployed environment, realizes that different zones, different type are matched somebody with somebody
The seamless access of electric terminals, various wireless communication access technology composite communication, fiber radio integration access have been obviously improved it
Efficiency, reduce and build O＆M cost with network communication system, improve with network communication system comprehensive utilization ratio.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer journey
Sequence product.Therefore, the present invention can use complete hardware embodiment, complete software embodiment or with reference to software and hardware
The form of the embodiment of aspect.Moreover, the present invention can use wherein includes computer available programs in one or more
The computer-usable storage medium (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.) of code
The form of the computer program product of upper implementation.
The present invention is the stream with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Journey figure and/or block diagram describe.It should be understood that can be by computer program instructions implementation process figure and/or block diagram
Each flow and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These can be provided
Computer program instructions are set to the processing of all-purpose computer, special-purpose computer, Embedded Processor or other programmable datas
Standby processor is to produce a machine so that is held by the processor of computer or other programmable data processing devices
Capable instruction is produced for realizing in one flow of flow chart or multiple flows and/or one square frame of block diagram or multiple sides
The device for the function of being specified in frame.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory produces bag
The manufacture of command device is included, the command device is realized in one flow of flow chart or multiple flows and/or block diagram one
The function of being specified in individual square frame or multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as to calculate
The instruction performed on machine or other programmable devices provide for realizing in one flow of flow chart or multiple flows and/or
The step of function of being specified in one square frame of block diagram or multiple square frames.
Apply specific embodiment in the present invention to be set forth the principle and embodiment of the present invention, above example
Explanation be only intended to help understand the present invention method and its core concept；Meanwhile for the general technology of this area
Personnel, according to the thought of the present invention, there will be changes in specific embodiments and applications, in summary,
This specification content should not be construed as limiting the invention.
Claims (9)
1. a kind of distribution web area intelligent terminal, it is characterised in that including control chip and uplink communication module；
The uplink communication module is led to including LTE230 modules, Wifi modules, GPRS module, 4G modules and light
Believe module；
The control chip is used for the power dispatching data for receiving controller switching equipment, and selects different uplink communication modules, by institute
State power dispatching data and send long-range power distribution automation main station to.
2. distribution web area intelligent terminal according to claim 1, it is characterised in that the control chip leads to
Cross network interface and/or serial ports is connected to the controller switching equipment, realize data interaction.
3. distribution web area intelligent terminal according to claim 1, it is characterised in that the distribution web area
The uplink and downlink communication protocol massages form of intelligent terminal is：
Head, host address, slave addresses, control code, function code, data length, valid data and check code.
4. distribution web area intelligent terminal according to claim 1, it is characterised in that the control chip connects
The power dispatching data of controller switching equipment is received, and selects different uplink communication modules, including：
Detect the current signal strength RSS for the access point that the distribution web area intelligent terminal currently connectscur；
As the current signal strength RSScurLess than minimum signal strength RSSminWhen, perform scan channel；
When carrying out the scan channel, if detecting the current signal strength RSScurMore than maximum signal
RSSmax, then scan channel is stopped, and using current access point as new wireless communication access point, associated again.
5. distribution web area intelligent terminal according to claim 4, it is characterised in that when detecting described match somebody with somebody
The current signal strength RSS for the access point that Grid intelligent terminal currently connectscurLess than the signal threshold value of setting
RSSresWhen, it is not responding to scan channel.
6. the distribution web area intelligent terminal according to any one of claim 1 to 5, it is characterised in that described
Control chip is Freescale MK60 chips.
7. the distribution web area intelligent terminal according to any one of claim 1 to 5, it is characterised in that described
LTE230 modules, Wifi modules are connected by wireless network with public network base station, and the public network base station passes through Ethernet
Communicated with the long-range power distribution automation main station.
8. the distribution web area intelligent terminal according to any one of claim 1 to 5, it is characterised in that described
GPRS module, 4G modules are connected by wireless network with private network base station, the private network base station by Ethernet with
The long-range power distribution automation main station is communicated.
9. the distribution web area intelligent terminal according to any one of claim 1 to 5, it is characterised in that described
Optical communications module carries out the power dispatching data by fiber medium and the long-range power distribution automation main station direct communication
Transmission.
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| CN201610305608.4A CN107359698B (en) | 2016-05-10 | 2016-05-10 | A kind of distribution web area intelligent terminal |
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| CN107359698B CN107359698B (en) | 2019-08-02 |
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| CN108039041A (en) * | 2018-01-30 | 2018-05-15 | 北京博望华科科技有限公司 | A kind of high speed 4G concentrators communication module, power information acquisition system and method |
| CN109475012A (en) * | 2018-11-20 | 2019-03-15 | 广西电网有限责任公司南宁供电局 | A kind of double card bilateral safe distribution of electric power communication terminal, system and its communication means |
| CN109525273A (en) * | 2018-11-20 | 2019-03-26 | 广西电网有限责任公司南宁供电局 | A kind of double card bilateral power distribution communication terminal and its communication means |
| CN109548200A (en) * | 2018-12-17 | 2019-03-29 | 深圳市奥克多普科技有限公司 | A kind of local microcellulor signal covering micro-base station device |
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