CN105827016A - Mid and low-voltage distribution network intelligent monitoring system based on 3G communication network - Google Patents
Mid and low-voltage distribution network intelligent monitoring system based on 3G communication network Download PDFInfo
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- CN105827016A CN105827016A CN201510010069.7A CN201510010069A CN105827016A CN 105827016 A CN105827016 A CN 105827016A CN 201510010069 A CN201510010069 A CN 201510010069A CN 105827016 A CN105827016 A CN 105827016A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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Abstract
The invention discloses a mid and low-voltage distribution network intelligent monitoring system based on a 3G communication network, which comprises a remote monitoring main station, a monitoring substation and a communication system, wherein the remote monitoring main station is in the highest layer of the entire system and is in charge of graphic display, background processing, report output, remote power device control and interaction completion between an upper computer and the bottom monitoring substation; the monitoring substation is an execution layer of the entire system and is in charge of uploading various states of a field device, receiving various instructions issued by the upper computer and instructing a field intelligent terminal to complete a required command; and the communication system is used for remotely monitoring interaction of data between the monitoring main station and the monitoring substation. Through recording and analyzing the operation state of the power device in real time, the working state and the service life of the power device are reasonably judged for later reading and check. Based on the 3G communication network, the system of the invention realizes functions of telemetering, remote communication, remote control, remote vision, device health state detection, environmental detection, preliminary electricity analysis and the like.
Description
Technical field
The present invention relates to power system automatic field, a kind of low and medium voltage distribution network intelligent monitoring system based on 3G communication network.
Background technology
The construction of communication system is to realize one of distribution network automated emphasis and difficult point.There is a lot of drawback in cable that traditional remote monitoriong of electric power system is used, power line carrier, waveguide, optical cable etc., the most uneconomical also inconvenient.In recent years, public mobile communication technology and communication network thereof develop rapidly, price and the operation cost of communication equipment are more and more lower, information synthesis business service function from strength to strength.The high communication quality of the digital cellular network such as GPRS/3G, blind spot is seldom had in its coverage rate, it need not construction investment and the maintenance cost of communication rack simultaneously, and for the user, GPRS/3G has the features such as simple, easy-to-use as high speed, virtual data channel always online, transparent data transfer.Therefore, utilize GPRS/3G technology to realize power distribution automation and there is the advantage of self uniqueness.
Summary of the invention
It is an object of the invention to provide a kind of low and medium voltage distribution network intelligent monitoring system based on 3G communication network, it is achieved the functions such as four distant (remote measurement, remote signalling, remote control, remote viewings), the detection of equipment health status, environmental monitoring and electricity consumption preliminary analysis.
For achieving the above object, the present invention provides following technical scheme:
A kind of low and medium voltage distribution network intelligent monitoring system based on 3G communication network, including long-range master station, monitoring substation, communication system；Described long-range master station is in the top of whole system, is responsible for graphic software platform, background process, report output, remotely controls power equipment, completes host computer and bottom and monitor the mutual of substation；Described monitoring substation is the execution level of whole system, is responsible for uploading of the various state of field apparatus, receives the various instructions that host computer is assigned, and commands the intelligent terminal at scene to complete the order required；Described communication system is mutual for the data between long-range master station and monitoring substation.
As the further scheme of the present invention: described intelligent terminal includes in the middle main supervising device of pressure incoming line cabinet, the middle main supervising device of extrusion line cabinet, middle pressure cabinet temperature-humidity signal harvester, low-pressure line-outgoing monitor, low-voltage compensation capacitor supervising device, communication controler, image collecting device and indoor temperature and humidity signal picker in temperature-humidity signal harvester, the main supervising device of low voltage incoming line cabinet, the main supervising device of low-voltage capacitor box, low-voltage cabinet.
As the further scheme of the present invention: described intelligent terminal also includes digital signal processor DSP, analog-digital converter AD7606 and dual port RAM, digital signal processor DSP is responsible for analog signal data collection and computing, control analog-digital converter AD7606 and carry out analog digital conversion, after being corrected by conversion the data obtained, calculate three-phase voltage, three-phase current, three phases active power, three phase reactive power and power factor etc.；Then, the result calculated being stored in the appointment region of dual port RAM, the processor ARM controller for intelligent terminal reads.
As the further scheme of the present invention: described intelligent terminal uses feature card, the version of plug-in unit is linked again by bus, the structure of described intelligent terminal is made up of 8 plug-in units, turns left from the right side and is followed successively by live detection plug-in unit, 2 DI/DO plug-in units, communication plug-in unit, 3 AC plug-in units and power module plug-in unit.
As the further scheme of the present invention: described communication plug-in unit, for the communication of terminal unit, is furnished with two RS-485 interfaces, a RS-422 interface, an optical fiber interface and a network interface.
As the further scheme of the present invention: the communication between described intelligent terminal uses RS-485 or RS-422 or fiber optic serial communication, communication protocol is self-defined or uses MODBUS agreement or the agreement of other user requirement.
As the further scheme of the present invention: what described communication system was selected is communication based on 3G.
Compared with prior art, the invention has the beneficial effects as follows:
(1) record energy storage motor operating current, voltage, the parameter such as the number of starts, cumulative operation time, by the data sampling to energy storage motor operating current, obtain energy storage motor and start and work wave, by running status and the life-span of the data assessment energy storage motor of acquisition.
(2) the same kind chopper that state is intact, the current waveform of divide-shut brake coil is similar, then time characteristic parameters should change within the specific limits.Therefore, the chopper just dispatched from the factory can be carried out characteristic parameter test, or the divide-shut brake coil current waveform of chopper when acquisition state is intact, to build original waveform data storehouse, as reference waveform or the reference of waveform comparison in the future, in the future by divide-shut brake coil current waveform during this breaker actuation is compared with reference waveform, reach the purpose of state analysis and failure predication.
(3) cumulative operation time and the total action frequency of chopper after record chopper regular event number of times and excision fault actions number of times, branch wire time, chopper put into, for host computer real time review and can check in the future, do basis for circuit-breaker status assessment.
(4) monitor bus three-phase voltage, electric current in real time, install temperature measuring equipment additional at busbar combination point simultaneously, monitor bus temperature in real time, thus the whole state for electric line is estimated.
(5) analyzed by above, by the real time record of power equipment running state and analysis, power equipment duty can be made reasonably judgement.The parameter obtained after signal processing is compared with canonical parameter, so that it is determined that the duty of power equipment, working life, whether there is fault and the type of fault and character etc..The trend that simultaneously may be able to develop according to current data predicted state, carries out fault trend analysis, should formulate rational criterion and strategy for this.
(6) monitoring camera is installed additional in smart machine erecting bed, can be with real-time watch device operation conditions and environmental aspect.Comprehensive can reflect site environment information in real time by photographic head, thus make Corresponding Countermeasures.
(7) in the complete set of equipments of substation, Temperature Humidity Sensor is installed additional, can the humiture numerical value of monitoring site in real time.User can arrange the bound of heating/dehumidifying/air draft output the most voluntarily.When ambient humidity is less than lower limit more than higher limit or its temperature, start heating；When humidity is more than higher limit less than lower limit or temperature, stop heating；When heater broken string or short circuit, output of reporting to the police.Simultaneously equipped with blower fan, open ventilating system when needed, strengthen heat radiation and the effect of dehumidifying.Which can on-line monitoring humidity sensor and the duty of electric heater, it is ensured that the safety of switchgear internal medium.
(8) according to power system " five prevent " requirement, installing high-voltage charge display device in high-tension switch cabinet, in order to show the electriferous state of high tension loop, warning runs and maintainer, not mistakenly entering charged chamber and hot line job high pressure equipment.
(9) in the monitoring substation equipped with SF6 equipment, at ordinary times because improper ventilation may lack fresh air, anoxia or pollute indoor environment because of the leakage of equipment SF6 gas, make the operator in entrance room, make an inspection tour, the health even life of maintainer by serious threat, run to electric power safety and bring challenges.Oxygen content in SF6 gas leakage situation in environment and air can be monitored by intelligent terminal in real time, and shows, staff can judge before entering switchgear house the need of carrying out forced ventilation according to this information.
Accompanying drawing explanation
Fig. 1 is the structure chart of a kind of low and medium voltage distribution network intelligent monitoring system based on 3G communication network；
Fig. 2 is that the intelligent terminal system of a kind of low and medium voltage distribution network intelligent monitoring system based on 3G communication network constitutes schematic diagram；
Fig. 3 is intelligent terminal's feature card composition schematic diagram of a kind of low and medium voltage distribution network intelligent monitoring system based on 3G communication network；
Fig. 4 is the intelligent terminal hardware block diagram of a kind of low and medium voltage distribution network intelligent monitoring system based on 3G communication network；
Fig. 5 is DSP and the related device annexation of a kind of low and medium voltage distribution network intelligent monitoring system based on 3G communication network；
Fig. 6 is ARM and the related device annexation of a kind of low and medium voltage distribution network intelligent monitoring system based on 3G communication network；
Fig. 7 is the communication system composition schematic diagram of a kind of low and medium voltage distribution network intelligent monitoring system based on 3G communication network.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
Referring to Fig. 1, in the embodiment of the present invention, a kind of low and medium voltage distribution network intelligent monitoring system based on 3G communication network, including long-range master station, monitoring substation, communication system.
Described long-range master station is in the top of whole system, is the nerve centre of whole system, i.e. Surveillance center, is responsible for graphic software platform, background process, report output, remotely controls power equipment, completes host computer and bottom and monitor the mutual of substation.Remotely the function of monitoring host computer includes distribution system long-distance monitor and control and data acquisition (data acquisition and the function of supervisor control), running Optimization, system protection and self-healing control, equipment working condition supervision, equipment operating environment supervision, equipment health state evaluation and prediction etc..The function that client software can realize mainly has: data acquisition and monitoring function, data sharing function, electricity consumption form and curve drafting function, emergency review function, method of operation assessment and optimization function, equipment control and remote maintenance functions and network reconfiguration function.
Described monitoring substation is primarily referred to as user's power distribution station substation, and monitoring substation is the execution level of whole system, is responsible for uploading of the various state of field apparatus, receives the various instructions that host computer is assigned, and commands the intelligent terminal at scene to complete the order required.The substation complete set of equipments of monitoring substation mainly includes being pressed into complete equipment and intelligent terminal, intelligent low voltage complete set and intelligent terminal, the device for temperature-humidity monitoring and regulation, the image collecting device for environmental surveillance and remote communication interface equipment in intellectuality.The running state monitoring of the functional packet enclosed tool station complete set of equipments of described intelligent terminal and data acquisition, operating condition detection and equipment intelligent diagnosis, running environment monitoring, relay protection and data communication etc..
Described communication system, can be according to the requirement of use occasion, traffic rate, real-time, reliability and data volume, it is possible to treatment in accordance with local conditions comprehensively uses the combination of communication in line with the principle of " reliability, advance combine with economy ".Remotely can be based on scene existing communication network work between master station and monitoring substation, also exist in view of distribution terminal that dispersion, data volume be many, distance, set up the uneconomic problem of wire communication, in the case of there is no ready-made communication network, telecommunications network can be built based on public 3G cordless communication network.The present invention realizes remotely monitoring based on 3G network.Remote switch data include up detection data, view data, video data and descending control command.
Referring to Fig. 2, described intelligent terminal mainly includes in the middle main supervising device of pressure incoming line cabinet, the middle main supervising device of extrusion line cabinet, middle pressure cabinet temperature-humidity signal harvester, low-pressure line-outgoing monitor, low-voltage compensation capacitor supervising device, communication controler, image collecting device and indoor temperature and humidity signal picker etc. in temperature-humidity signal harvester, the main supervising device of low voltage incoming line cabinet, the main supervising device of low-voltage capacitor box, low-voltage cabinet.Communication between intelligent terminal uses RS-485 or RS-422 or fiber optic serial communication, and communication protocol is self-defined or uses MODBUS agreement or the agreement of other user requirement.Teledata exchanges by communication controler control, communication controler is connected with intelligent terminal by communication interface, another communication interface of communication controler is connected with data transmission unit DTU, and data transmission unit DTU is then by wireless link 3G/GPRS and long-range monitoring host computer communication.
Referring to Fig. 3, described intelligent terminal uses feature card, then is linked the version of plug-in unit by bus.This version has the advantages that plug is laborsaving, plug-in unit is convenient for changing, retaining mechanism is solid and reliable.One cabinet can put into a cpu motherboard, and this mainboard is held concurrently the effect of bus simultaneously, and plug-in unit uses back plug-in type.Each signal is all accessed by connector terminals, is followed by into mainboard through plug-in unit signal processing.Each feature card must be according to specific bit placement location in mainboard relevant position.The structure of described intelligent terminal is made up of 8 plug-in units, turns left from the right side and is followed successively by live detection plug-in unit, 2 DI/DO plug-in units, communication plug-in unit, 3 AC plug-in units and power module plug-in unit.Wherein, live detection plug-in unit is used for detecting that low-voltage equipment is the most charged and busbar joint temperature is the most out-of-limit；DI/DO plug-in unit is for the input and output of switching value, the switching value such as including working state of circuit breaker, circuit breaker position, earthed switch position, cabinet door position and remote control locking；Communication plug-in unit, for the communication of terminal unit, is furnished with two RS-485 interfaces, a RS-422 interface, an optical fiber interface and a network interface；AC plug-in unit is used for analog measurement, measures including voltage x current, the measurement of protection voltage x current and the measurement of circuit-breaker switching on-off coil current, energy storage motor operating current；Power module plug-in unit is Switching Power Supply, for providing working power for the equipment in intelligent terminal.
Referring to Fig. 4, described intelligent terminal's governor circuit is made up of various hardware.Electrification in high voltage detection and locking thereof " inform " the charged situation of intelligent terminal's high voltage bus by relay normally open contact.In cabinet, Temperature Humidity Sensor, gas sensor, busbar joint temperature transducer are all connected with intelligent terminal by communication interface.Each outlet state detection unit of low-pressure line-outgoing cabinet is connected with intelligent terminal also by communication interface.Teledata exchanges by communication controler control, and another communication interface of communication controler is connected with data transmission unit DTU, and data transmission unit DTU is then by wireless link (CDMA) and long-range monitoring host computer communication.But, intelligent terminal can also double as communication controler.In this case, data transmission unit DTU is connected with another communication interface of intelligent terminal, to realize teledata exchange.
Refer to Fig. 5, described intelligent terminal also includes digital signal processor DSP, analog-digital converter AD7606 and dual port RAM, digital signal processor DSP is responsible for analog signal data collection and computing, control analog-digital converter AD7606 and carry out analog digital conversion, after being corrected by conversion the data obtained, calculate three-phase voltage, three-phase current, three phases active power, three phase reactive power and power factor etc..Then, the result calculated being stored in the appointment region of dual port RAM, the processor ARM controller for intelligent terminal reads.
Referring to Fig. 6, the processor ARM (model is STM32F103) of described intelligent terminal is responsible for the control of peripheral circuit, including display and the control of man-machine interface；The coordination of telecommunication controls；Read relay protection setting initial value, no-load voltage ratio etc. to judge, calculate required numerical value and send digital signal processor DSP to；The data after digital signal processor DSP processes are read from dual port RAM; realize analog quantity monitoring; and gather on-off model voluntarily, according to the function such as environmental surveillance and regulation control, busbar joint temperature monitoring in monitoring, voltage & var control, relay protection (standby), fault recorder data (standby), circuit-breaker status detection and diagnosis, the switch cubicle of predetermined functional realiey.
The design of described intelligent terminal's communication interface, it is contemplated that the versatility of intelligent terminal, configures multiple communication interface in the terminal, can select suitable communication interface according to fielded system demand.
Described intelligent terminal's man-machine interface design includes that button operation, LCD liquid crystal display, LED lamplight show and sound source output etc..
Referring to Fig. 7, described communication system is mainly used in multi-point and wide-ranging low and medium voltage distribution network, and communication data is more, and communication system builds complexity, and select the most here is communication based on 3G.In monitoring substation, each controller switching equipment is each equipped with intelligent terminal, these intelligent terminal had both needed to carry out data communication with on-scene communication controller, it is also required to communication the most each other, in conventional communication mode, according to device location, the distance of communication and traffic rate etc., the communication modes such as optical fiber, Ethernet or twisted-pair feeder can be used, native system is applied in power distribution station, communication distance is limited, and equipment is more, uses Shielded Twisted Pair RS485 communication mode.Also dependent on the existing factor such as communication system and communication distance of power distribution network, it is considered to use the communication mode such as optical fiber, Ethernet.Owing to low pressure line feed terminals quantity is many, equipment is concentrated, and communication data traffic is big, and communicating requirement is high, relatively near with communication controler geographical position, selects Shielded Twisted Pair RS485 bus mode to communicate.Each low pressure line feed terminals is carried out unique ID numbering, uses cyclic query communication mode, utilize the time that communication controler communicate with host computer, and line feed terminals carries out issuing of data exchange and control command.The primary clustering of image monitoring system includes high performance network photographic head and microcomputer, and IP Camera is responsible for image acquisition, owing to image information data is relatively big, higher to transmission rate request, therefore selects Ethernet to be connected with industrial computer.
The invention have the characteristics that:
(1) record energy storage motor operating current, voltage, the parameter such as the number of starts, cumulative operation time, by the data sampling to energy storage motor operating current, obtain energy storage motor and start and work wave, by running status and the life-span of the data assessment energy storage motor of acquisition.
(2) the same kind chopper that state is intact, the current waveform of divide-shut brake coil is similar, then time characteristic parameters should change within the specific limits.Therefore, the chopper just dispatched from the factory can be carried out characteristic parameter test, or the divide-shut brake coil current waveform of chopper when acquisition state is intact, to build original waveform data storehouse, as reference waveform or the reference of waveform comparison in the future, in the future by divide-shut brake coil current waveform during this breaker actuation is compared with reference waveform, reach the purpose of state analysis and failure predication.
(3) cumulative operation time and the total action frequency of chopper after record chopper regular event number of times and excision fault actions number of times, branch wire time, chopper put into, for host computer real time review and can check in the future, do basis for circuit-breaker status assessment.
(4) monitor bus three-phase voltage, electric current in real time, install temperature measuring equipment additional at busbar combination point simultaneously, monitor bus temperature in real time, thus the whole state for electric line is estimated.
(5) analyzed by above, by the real time record of power equipment running state and analysis, power equipment duty can be made reasonably judgement.The parameter obtained after signal processing is compared with canonical parameter, so that it is determined that the duty of power equipment, working life, whether there is fault and the type of fault and character etc..The trend that simultaneously may be able to develop according to current data predicted state, carries out fault trend analysis, should formulate rational criterion and strategy for this.
(6) monitoring camera is installed additional in smart machine erecting bed, can be with real-time watch device operation conditions and environmental aspect.Comprehensive can reflect site environment information in real time by photographic head, thus make Corresponding Countermeasures.
(7) in the complete set of equipments of substation, Temperature Humidity Sensor is installed additional, can the humiture numerical value of monitoring site in real time.User can arrange the bound of heating/dehumidifying/air draft output the most voluntarily.When ambient humidity is less than lower limit more than higher limit or its temperature, start heating；When humidity is more than higher limit less than lower limit or temperature, stop heating；When heater broken string or short circuit, output of reporting to the police.Simultaneously equipped with blower fan, open ventilating system when needed, strengthen heat radiation and the effect of dehumidifying.Which can on-line monitoring humidity sensor and the duty of electric heater, it is ensured that the safety of switchgear internal medium.
(8) according to power system " five prevent " requirement, installing high-voltage charge display device in high-tension switch cabinet, in order to show the electriferous state of high tension loop, warning runs and maintainer, not mistakenly entering charged chamber and hot line job high pressure equipment.
(9) in the monitoring substation equipped with SF6 equipment, at ordinary times because improper ventilation may lack fresh air, anoxia or pollute indoor environment because of the leakage of equipment SF6 gas, make the operator in entrance room, make an inspection tour, the health even life of maintainer by serious threat, run to electric power safety and bring challenges.Oxygen content in SF6 gas leakage situation in environment and air can be monitored by intelligent terminal in real time, and shows, staff can judge before entering switchgear house the need of carrying out forced ventilation according to this information.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and without departing from the spirit or essential characteristics of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is limited by claims rather than described above, it is intended that all changes fallen in the implication of equivalency and scope of claim included in the present invention.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should can also be formed, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that as an entirety, the technical scheme in each embodiment by those skilled in the art.
Claims (7)
1. a low and medium voltage distribution network intelligent monitoring system based on 3G communication network, it is characterised in that include long-range master station, monitoring substation, communication system；Described long-range master station is in the top of whole system, is responsible for graphic software platform, background process, report output, remotely controls power equipment, completes host computer and bottom and monitor the mutual of substation；Described monitoring substation is the execution level of whole system, is responsible for uploading of the various state of field apparatus, receives the various instructions that host computer is assigned, and commands the intelligent terminal at scene to complete the order required；Described communication system is mutual for the data between long-range master station and monitoring substation.
Low and medium voltage distribution network intelligent monitoring system based on 3G communication network the most according to claim 1, it is characterized in that, described intelligent terminal includes in the middle main supervising device of pressure incoming line cabinet, the middle main supervising device of extrusion line cabinet, middle pressure cabinet temperature-humidity signal harvester, low-pressure line-outgoing monitor, low-voltage compensation capacitor supervising device, communication controler, image collecting device and indoor temperature and humidity signal picker in temperature-humidity signal harvester, the main supervising device of low voltage incoming line cabinet, the main supervising device of low-voltage capacitor box, low-voltage cabinet.
3. according to the arbitrary described low and medium voltage distribution network intelligent monitoring system based on 3G communication network of claim 1-2, it is characterized in that, described intelligent terminal also includes digital signal processor DSP, analog-digital converter AD7606 and dual port RAM, digital signal processor DSP is responsible for analog signal data collection and computing, control analog-digital converter AD7606 and carry out analog digital conversion, after being corrected by conversion the data obtained, calculate three-phase voltage, three-phase current, three phases active power, three phase reactive power and power factor etc.；Then, the result calculated being stored in the appointment region of dual port RAM, the processor ARM controller for intelligent terminal reads.
Low and medium voltage distribution network intelligent monitoring system based on 3G communication network the most according to claim 1, it is characterized in that, described intelligent terminal uses feature card, the version of plug-in unit is linked again by bus, the structure of described intelligent terminal is made up of 8 plug-in units, turns left from the right side and is followed successively by live detection plug-in unit, 2 DI/DO plug-in units, communication plug-in unit, 3 AC plug-in units and power module plug-in unit.
Low and medium voltage distribution network intelligent monitoring system based on 3G communication network the most according to claim 4, it is characterized in that, described communication plug-in unit, for the communication of terminal unit, is furnished with two RS-485 interfaces, one RS-422 interface, an optical fiber interface and a network interface.
Low and medium voltage distribution network intelligent monitoring system based on 3G communication network the most according to claim 1, it is characterized in that, communication between described intelligent terminal uses RS-485 or RS-422 or fiber optic serial communication, and communication protocol is self-defined or uses MODBUS agreement or the agreement of other user requirement.
Low and medium voltage distribution network intelligent monitoring system based on 3G communication network the most according to claim 1, it is characterised in that what described communication system was selected is communication based on 3G.
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| CN108270286A (en) * | 2016-12-30 | 2018-07-10 | 孙麓轩 | Low-voltage distribution system and control method |
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| CN109738754A (en) * | 2018-12-17 | 2019-05-10 | 江苏方天电力技术有限公司 | A kind of intelligent low-pressure branch monitoring device |
| CN111884334A (en) * | 2020-07-01 | 2020-11-03 | 南京合纵电力设备有限公司 | Monitoring method and system suitable for unattended low-voltage cabinet |
| CN111917182A (en) * | 2020-07-07 | 2020-11-10 | 贵州电网有限责任公司 | Method and system for directly transmitting data of double main stations of low-voltage distribution network |
| CN111987800A (en) * | 2020-08-19 | 2020-11-24 | 贵州电网有限责任公司 | Remote centralized state evaluation system and evaluation method of ice melting device |
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| CN107482781A (en) * | 2017-09-25 | 2017-12-15 | 深圳市智源光通讯技术有限公司 | A kind of LV Distribution Monitoring System |
| CN109507924A (en) * | 2018-11-28 | 2019-03-22 | 北京迈斯康特测控技术有限公司 | Remote monitoring system for oil field operation equipment |
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| CN111884334A (en) * | 2020-07-01 | 2020-11-03 | 南京合纵电力设备有限公司 | Monitoring method and system suitable for unattended low-voltage cabinet |
| CN111917182A (en) * | 2020-07-07 | 2020-11-10 | 贵州电网有限责任公司 | Method and system for directly transmitting data of double main stations of low-voltage distribution network |
| CN111917182B (en) * | 2020-07-07 | 2021-09-24 | 贵州电网有限责任公司 | Method and system for directly transmitting data of double main stations of low-voltage distribution network |
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