CN207232307U - A kind of cable-type fault location system - Google Patents
A kind of cable-type fault location system Download PDFInfo
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- CN207232307U CN207232307U CN201721121091.XU CN201721121091U CN207232307U CN 207232307 U CN207232307 U CN 207232307U CN 201721121091 U CN201721121091 U CN 201721121091U CN 207232307 U CN207232307 U CN 207232307U
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Abstract
The utility model discloses a kind of cable-type fault location system, including multiway cable circuit；Per the A phase, B phase, C phase of cable run, zero sequence, the A phase, B phase, C phase, zero sequence are respectively connected with a collecting unit all the way；Each described collecting unit is by a NB IOT wireless communication module and collects unit communication.The utility model, which can integrate, to be solved positioner collecting unit and collects unit in terms of communication distance and power consumption in the presence of the contradiction mutually restricted, the problems such as being connected up without the concern for the communication cable cabling in installation process, enormously simplify the process of installation and construction, it is cost-effective and meet power distribution network background monitoring system to fault locator data acquisition efficiently, big data, requirement of real time.Change communication structure and networking model so that collect unit and support the communication of multigroup collecting unit, and meet the low-power consumption demand of equipment operation.
Description
Technical field
Cable fault examination field is the utility model is related to, particularly a kind of cable-type fault location system.
Background technology
Intelligent grid is the inexorable trend of electric power network technique development, is the inevitable choice of socio-economic development, its proposition pushes away
The fast development of each correlation technique is moved.Intelligent power distribution network is also power grid intelligence important development stage.
Fault locator be the major product of power distribution network intelligent development one of, its major function in power grid is
Detection short circuit or earth fault, solve all standing, full collection and its distribution Internet of non-core regional distribution network operation collection
The problems such as tune, be part indispensable in intelligent distribution network system.Issued according to National Energy Board《Distribution network construction is transformed
Action plan (2015-2020)》, action plan is transformed by implementing distribution network construction, effectively increases power distribution network fund input.
2015-2020, distribution network construction investment for trnasforming urban land are not less than 2 trillion yuans, wherein investment was not less than 300,000,000,000 yuan, " ten in 2015
Three or five " accumulative investment is not less than 1.7 trillion yuans during.It is big to the year two thousand twenty, key city (area) intelligent construction and application level
Width improves, and power supply reliability reaches 99.99%, when the average annual power off time of user is small no more than 1, and power supply quality reaches international advanced
It is horizontal；Urban Areas power supply capacity and power supply safety level are obviously improved, and power supply reliability reaches more than 99.88%, Yong Hunian
When power off time is small no more than 10, ensure that regional economy society is fast-developing；Rural area and comprehensively solve power grid from far-off regions are thin
Weak problem, substantially eliminates long-term " low-voltage ", and capacity of distribution transform is not less than 2 kilovolt-amperes per family, the effective guarantee people's livelihood.
Internet of Things has been developed for many years in China, either intelligent industrial, car networking, smart home, wearable device
Etc. the trend for all suffering from breaking out comprehensively.Internet of Things has three key elements：Perceive, interconnect, intelligence, internet is in perception and intelligence
Existing new progress in terms of key element, and in another key element Internet of Things, but still rely on and be suitable for internet and mobile interchange
The internetwork connection mode of net, such as 3G, 4G, WIFI, bluetooth；But in the networking in face of user's portable and low energy consumption party in request
Face, even Internet of Things network users are also still not suitable with to the demand that is connected towards thing and the Zigbee network that thing is connected, so mutually
Connection has become the factor that Internet of Things is popularized on a large scale that restricts.
Since nearly 2 years, based on cellular arrowband Internet of Things --- NB-IoT, Full Name in English are (Narrow Band
Internet of Things, NB-IoT), it is a kind of digital modulation techniques realized based on spread spectrum, using Star Network
Framework, the simple network structure with lowest latency.Because its covering, power consumption, cost, connection number, connection efficiently etc.
Advantage has become an important branch of all things on earth internet.
Distribution line failure positioner in distribution network automated process of construction, increasingly obtains the attention of grid company,
Especially become the optimal of power distribution network intelligent construction in the suburb of load relative distribution and Rural Power Distribution Network, fault locator
Selection.
Cable-type line fault positioner is filled by cable-type fault locator collecting unit and cable-type fault location
Put and collect unit composition, data acquisition and fault location for cable run.Cable-type fault locator collecting unit is pacified
Loaded on single-phase cable run, possessing complete remote signalling, remote measurement, remote control, remote regulating four remote control function, and load electricity can be monitored
The real time datas such as stream, cell voltage.It is short that collecting unit selects adaptive load current mutation method or quick-break current ration method to judge
Road failure, judges earth fault using ground connection transient current, line-to-earth voltage method.Collect unit, be distribution main website and failure
Communication bridge between indicator, plays the role of the upload of data and assigns.Under normal conditions, its by communication cable mode come
The nearby action message of the collecting unit of installation, load current, short action electric current, first half-wave peak current/ground connection is collected to move
Make the data such as electric current, then by communication modes such as GPRS or optical fiber by the data sending being collected into backstage main website.
Due to cable run Relatively centralized, cable-type fault location system is typically mounted in switching station and ring main unit；It is logical
Reason condition can be configured according to ring main unit size or the scale of switching station 1~6 group (every group of four collecting units, including A, B, C phase and
Its zero sequence) and above fault locator collecting unit, every group of collecting unit communicated by communication cable with terminal, terminal
Again by the data set of collection, be in real time transmitted in the main website of power distribution network backstage.
Switching station and ring main unit due to the characteristic of the multiple-limb of cable run, one group collect unit usually require to gather it is multigroup
Collecting unit information, and between data interaction realized by cable routing；Therefore in cable run installation fault location system
Just need to think about the arrangement and cabling of communication cable the early period of system, and it is relatively complicated in implementation process is installed.To the greatest extent
Pipe, has by wireless Zigbee modes to realize that collect unit and collecting unit communication sets so as to remove communication cable circuit from present
That counts is cumbersome, still, on the one hand due to the high characteristic of its Zigbee modes short distance, power consumption so that whole communication network is inadequate
Stablize (distance collect unit farther out collecting unit communication off and on), on the other hand, due to cable run high current and
Its ring main unit metallic shield characteristic so that the interference of network is larger, and whole communication network quality is poor.
Existing cable-type fault locator network structure is as shown in Figure 1, under wire communication pattern, it is generally the case that
Cable-type fault locator collects unit by one and 8 groups of collecting units carry out networking (according to branch's way of cable run
Determine how many groups of collecting units), every group of collecting unit includes four collecting units such as A phase, B phase, C phase, zero sequence.It is actual at the scene
In environment, collect unit in ring main unit or switching station, collecting unit is installed in cable run branch.Collect unit
Data communication is carried out by serial ports or optical fiber with collecting unit, collects unit and passes the information that downlink gathers by GPRS communications
It is sent to background monitoring system.
Said structure is clearly present problems with：
1. the collecting unit of cable-type positioner is communicated between unit with collecting by serial ports or fibre circuit,
Since one is collected unit and usually requires to couple several or even tens (most 64) collecting units, implemented in installation
, it is necessary to take into full account the wiring problem of communication line in journey, the cost of design and construction is higher.
2. in switching station's ring main unit transformation project, if cable-type fault locator is installed additional, due to communication pattern
Limitation, to ensure the quality of construction, it usually needs have a power failure installation, it is impossible to realizes powered installation.
3. cable-type fault location system, which collects unit, uses alternating current 220V Alternating Current Power Supplies；Collecting unit is installed on cable
Lu Shang, its power supply mode take electricity and battery powered to be coil-induced, and main power supply takes electricity to be coil-induced, and battery powered supplies for auxiliary
Electricity.Under normal conditions if collecting unit and collecting unit installation site farther out, generally using fiber optic communication, luminous power module meeting
Increase the power consumption of collecting unit, therefore, when collecting unit is with collecting unit telecommunication, also need to consider collection
The power problems of unit, to ensure to consume battery capacity as little as possible, so as to increase the service life of collecting unit.
Utility model content
The utility model aims to provide a kind of cable-type fault location system, reduces design and construction cost, realizes powered
Installation, consumes battery capacity, so as to increase the service life of collecting unit as little as possible.
In order to solve the above technical problems, technical solution is used by the utility model：A kind of cable-type fault location system
System, including multiway cable circuit；Per the A phase, B phase, C phase of cable run, zero sequence all the way, the A phase, B phase, C phase, zero sequence respectively with
One collecting unit connection；Each described collecting unit is by a NB-IOT wireless communication module and collects unit communication.
The collecting unit includes MCU module；The MCU module is sent with stepper motor, NB-IOT wireless communication modules
End, Signal-regulated kinase, energy supply control module, logic processing module connection；It is the energy supply control module and power module, spare
Power supply, electricity taking coil connection；The logic processing module is connected with sampling coil；The electricity taking coil, sampling coil series connection.
The MCU module is also connected with indicator light.
The unit that collects includes main control unit；The main control unit and power module, display module, key-press module, NB-
IOT wireless communication modules receiving terminal, uplink communication module, super capacitor connection.
The main control unit includes master control borad and the sim card slot being arranged on the master control borad.
The cable circuit quantity is four tunnels.
The unit that collects is in ring main unit or switching station.
The collecting unit is installed in cable run branch.
The logic processing module includes RC filter circuits；The RC filter circuits input terminal connects with the sampling coil
Connect；Described one output terminal of RC filter circuits is connected with comparator, described another output terminal of RC filter circuits and signal condition
Module connects；The comparator is connected with the MCU module.Line load electric current is by electromagnetic induction, the shape in sampling coil
The induced voltage (about millivolt level) of linear scale, which first passes through RC filter circuits after entering logic processing module
High frequency filter is carried out, on the one hand filtered signal carries out fault logic judgement by comparator circuit, export fault message, and
This information is transmitted to MCU module with interrupt mode；On the other hand, Signal-regulated kinase is transferred directly to, as simulation-number
Word signal is changed.
Compared with prior art, had the beneficial effect that possessed by the utility model：The utility model can integrate solution and determine
Position device collecting unit and collect unit and there is the contradiction that mutually restricts in terms of communication distance and power consumption, it is not necessary to which consideration is being pacified
The problems such as communication cable cabling wiring during dress, it enormously simplify the process of installation and construction, it is cost-effective and meet
Power distribution network background monitoring system is efficient to fault locator data acquisition, big data, requirement of real time.Change communication structure and group
Net pattern so that collect unit and support the communication of multigroup collecting unit, and meet the low-power consumption demand of equipment operation.
Brief description of the drawings
Fig. 1 is cable-type fault locator signal flow and installation site figure；
Fig. 2 is the utility model fault detector signal flow and installation site figure；
Fig. 3 is the utility model collecting unit structure chart；
Fig. 4 is to collect cellular construction figure；
Fig. 5 is logic processing module structure chart of the present invention.
Embodiment
As shown in Fig. 2, the utility model in cable-type fault location system by using NB-IOT networkings, it can be achieved that low
Power consumption, remote, efficient communication requirement：One is collected unit and is responsible for gathering all collecting unit data, then by GPRS or
Person's other modes transfer data to monitoring backstage.Under normal operation circumstances, it can meet the NB-IOT's of required communication rate
Coverage is quite wide.Unit can be collected by one to collect the data message of other collecting units, so that simplification is whole
A system group network structure.During the installation of cable-type fault location system, eliminate the wiring of communication line, connect
The complicated processes of line, cabling, support powered installation, enormously simplify the process of installation, save installation cost.
Cable-type fault locator mainly by collecting unit and is collected unit and is formed, collecting unit and collect unit it
Between realize NB-IOT networking models, it is necessary in collecting unit and collect NB-IOT wireless communication modules are added in unit.
1) NB-IOT networking models collecting unit structure is as shown in Figure 2；
Collecting unit composition module includes logic processing module, failure indication module, NB-IOT wireless communication modules, MCU
Module, power module, Signal-regulated kinase etc..Logic processing module mainly carries out event by hardware circuit to being detected circuit
Barrier differentiates, if fault-signal, then fault-signal directly is transmitted to MCU module；Power module includes main electricity with after
Stand-by power source, main power source take electricity by electromagnetic induction, and backup power supply uses high-performance lithium battery powered, main power supply and backup power supply
Independently of each other, when main power supply cannot maintain device global function to work, backup power supply automatically engages.When main power supply recovers
When, automatic switchback main power supply power supply；MCU module uses STM32L476 series monolithics, 32 low-power consumption, high-precision ADC
Sample and quickly calculate disposal ability；Failure indication module is mainly that control output circuit includes stepper motor board turning circuit and refers to
Indication lamp circuit；Signal-regulated kinase, mainly includes A/D samplings and filter circuit, after filtering and analog sampling, eventually enters into
MCU simultaneously measures load current amount；On the one hand NB-IOT communication modules carry out intercommunication by SPI and MCU, on the other hand logical
Cross wireless NB-IOT communication modes and collect unit and carry out information exchange.
2) it is as shown in Figure 3 to collect cellular construction for NB-IOT networking models；
Collecting unit comprising modules includes AC power supply module, LCD MODULE, key-press module, NB-IOT wireless communications
The components such as module, uplink communication module, ultracapacitor, main control unit form.The terminal is received by NB-IOT communication modes
The action message of all collecting units of collection cable run installation, load current, short action electric current, first half-wave spike electricity
The data such as stream/landing operation electric current, line-to-ground electric field, are on the one hand come out data real-time display by Liquid Crystal Module, another
Aspect is by uplink communication module by the data sending being collected into main website.It is multiple that the inquiry of main website link, link can be received at the same time
Position, always call the orders such as data, remote regulating (communication and fault detector parameter), remote control (board turning of fault detector and involution) together.Press
Key module carries out data query and its messaging parameter write-in for user；Power module major function is to convert alternating current AC220V
DC5V the and 12V power supplys needed for device, ensure lasting power supply supply；Ultracapacitor major function is to collect unit friendship
When ensureing that continuous service 1 is small after stream power cut-off, the fault data of collection is preserved and reported.
Main control unit includes master control borad, sim card slot, and sim card slot is mainly used for installing SIM Internet of Things network interface cards, and master control borad is remittance
Collect unit core control panel, pass through two-way serial peripheral SPI communication mode and GPRS module and its NB-IOT wireless communication modules
Communicate, in addition, the also reserved serial ports all the way of master control borad, for debugging.
Such as Fig. 5, logic processing module includes RC filter circuits；The RC filter circuits input terminal connects with the sampling coil
Connect；Described one output terminal of RC filter circuits is connected with comparator, described another output terminal of RC filter circuits and signal condition
Module connects；The comparator is connected with the MCU module.Line load electric current is by electromagnetic induction, the shape in sampling coil
The induced voltage (about millivolt level) of linear scale, which first passes through RC filter circuits after entering logic processing module
High frequency filter is carried out, on the one hand filtered signal carries out fault logic judgement by comparator circuit, export fault message, and
This information is transmitted to MCU module with interrupt mode；On the other hand, Signal-regulated kinase is transferred directly to, as simulation-number
Word signal is changed.
Claims (9)
1. a kind of cable-type fault location system, including multiway cable circuit；Per the A phase, B phase, C phase of cable run, zero all the way
Sequence, the A phase, B phase, C phase, zero sequence are respectively connected with a collecting unit；It is characterized in that, each described collecting unit passes through
One NB-IOT wireless communication module is with collecting unit communication.
2. cable-type fault location system according to claim 1, it is characterised in that the collecting unit includes MCU moulds
Block；The MCU module and stepper motor, NB-IOT wireless communication modules transmitting terminal, Signal-regulated kinase, energy supply control module,
Logic processing module connects；The energy supply control module is connected with power module, stand-by power supply, electricity taking coil；At the logic
Reason module is connected with sampling coil；The electricity taking coil, sampling coil series connection.
3. cable-type fault location system according to claim 2, it is characterised in that the MCU module also with indicator light
Connection.
4. cable-type fault location system according to claim 1, it is characterised in that the unit that collects includes master control list
Member；The main control unit and power module, display module, key-press module, NB-IOT wireless communication modules receiving terminal, uplink communication
Module, super capacitor connection.
5. cable-type fault location system according to claim 4, it is characterised in that the main control unit includes master control borad
With the sim card slot being arranged on the master control borad.
6. cable-type fault location system according to claim 1, it is characterised in that the cable circuit quantity is four
Road.
7. cable-type fault location system according to claim 1, it is characterised in that the unit that collects is installed on looped network
In cabinet or switching station.
8. cable-type fault location system according to claim 1, it is characterised in that the collecting unit is installed on cable
In lines branch.
9. cable-type fault location system according to claim 2, it is characterised in that the logic processing module includes RC
Filter circuit；The RC filter circuits input terminal is connected with the sampling coil；Described one output terminal of RC filter circuits with than
Connected compared with device, described another output terminal of RC filter circuits is connected with Signal-regulated kinase；The comparator and the MCU module
Connection.
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| CN201721121091.XU CN207232307U (en) | 2017-09-04 | 2017-09-04 | A kind of cable-type fault location system |
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| CN201721121091.XU CN207232307U (en) | 2017-09-04 | 2017-09-04 | A kind of cable-type fault location system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058106A (en) * | 2019-03-05 | 2019-07-26 | 柳州和利时科技有限责任公司 | A kind of spare core line monitoring system based on NBIoT Internet of Things |
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2017
- 2017-09-04 CN CN201721121091.XU patent/CN207232307U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058106A (en) * | 2019-03-05 | 2019-07-26 | 柳州和利时科技有限责任公司 | A kind of spare core line monitoring system based on NBIoT Internet of Things |
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