CN109075608A - Wire breakage detector - Google Patents
Wire breakage detector Download PDFInfo
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- CN109075608A CN109075608A CN201680083400.0A CN201680083400A CN109075608A CN 109075608 A CN109075608 A CN 109075608A CN 201680083400 A CN201680083400 A CN 201680083400A CN 109075608 A CN109075608 A CN 109075608A
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- transformer
- communication function
- determination unit
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- H04W4/04—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Selective Calling Equipment (AREA)
Abstract
The purpose of the present invention is to provide a kind of wire breakage detectors, can accurately detect the broken string in distribution system.Wire breakage detector of the invention has: communication unit (12), receives the measurement data measured by the terminal of tabling look-up (7) with communication function by multi-hop wireless communication；Communication topology analysis portion (14) analyzes the communication topology of each terminal of tabling look-up (7) with communication function according to measurement data；And broken string determination unit (17), situation related with the broken string in distribution system is determined according to the communication conditions of communication unit (12), among the terminal of tabling look-up (7) with communication function that communication unit (12) can not receive measurement data, for being present in the terminal of tabling look-up (7) with communication function of the upper near communication unit (12) side in communication topology, communication topology analysis portion (14) is judged to having power failure possibility, the next terminal of tabling look-up (7) with communication function of the terminal of tabling look-up (7) with communication function of power failure possibility is judged as being present in, communication topology analysis portion (14) is determined as that state is unknown.
Description
Technical field
The present invention relates to wire breakage detectors, bear more particularly to from distribution substation via transformer to party in request
It carries equipment and carries out the wire breakage detector that the broken string in the distribution system of distribution is detected.
Background technique
From distribution substation, by the distribution system of power distribution to each party in request, the broken string of distribution wire is possible to lead
Cause the great failure of public disaster.The distribution wire cut off not in contact with to ground etc. situation or distribution wire be wrapped by
The case where it is inferior, be not in exception in the measured value of protective device, so the detection at the broken string position in distribution system is
Difficult.
As the countermeasure of the above problem, following method is proposed: flexibly coming with the intelligence instrument introduced in recent years
The presence or absence of detection broken string or broken string position.Here, intelligence instrument refers to, the prime of load equipment is set in each party in request
The terminal of tabling look-up (meter reading terminal) for having communication function of (transformer side).By remotely with Intelligent Instrument
Table is communicated, and can obtain electricity usage amount from the intelligence instrument.
If distribution wire breaks, decline (hereinafter referred to as voltage decline) in load side voltage from the position of broken string.Separately
Outside, since the voltage declines, the voltage value of intelligence instrument measurement also declines, if voltage value further declines, intelligence instrument
Movement itself stop.Such phenomenon, the detection flexibly broken with intelligence instrument can be utilized.
In the past, technology that the generation section to the broken string in high tension distribution system is determined is disclosed (referring for example to special
Sharp document 1).In patent document 1, it is set to the table look-up device (suitable with intelligence instrument) at the low party in request of distribution system
In the case that amount of power or the measured value of voltage are the range for indicating broken string possibility, sent from table look-up device to statistics center
Warning message determines set of terminal or column transformer belonging to relevant to warning message table look-up device, by these information and
Broken string number positional is compareed according to library, so that it is determined that the generation section of the broken string in high tension distribution system.
In addition, disclose in the communications break in the case where explore circuitous path come ensure communicate technology (referring for example to special
Sharp document 2).In patent document 2, in the Information Collection System for sending information to gateway server via cordless communication network
In, tilt detection sensor that state change corresponding with the inclination of electric pole is detected (although being equivalent to intelligence instrument,
But the not no measurement function of electric power) break in the communications in the case where explore circuitous path and ensure to communicate.
In addition, disclosing the technology that detection has a power failure (referring for example to patent document 3).In patent document 3, using occurring
The situation that information can not be sent when power failure from intelligence instrument, there is no as daily there is a situation where communication mistake will be because
Under, which is judged to having a power failure.
Existing technical literature
Patent document 1: Japanese Unexamined Patent Publication 2011-250580 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2006-217704 bulletin
Patent document 3: Japanese Unexamined Patent Publication 2013-146115 bulletin
Summary of the invention
In patent document 1, it in order to enable intelligence instrument to send warning message when having a power failure, needs to take intelligence instrument
Battery when having a power failure is carried, there are expense such problems.
In patent document 2, certain is needed in order to form the circuitous path for the multi-hop wireless communication for utilizing intelligence instrument
The time of degree, but in the case where the detection of the early stage as the detection for needing to break, the formation of circuitous path is unsuitable
's.
In multi-hop wireless communication, intelligence instrument is communicated via neighbouring other intelligence instruments with device is summarized,
But in the case where communicating the communication of intelligence instrument of upper (summarizing device side) is exception, via under the communication of the intelligence instrument
The intelligence instrument of position can not be communicated not having a power failure with device is summarized.In patent document 3, according to whether there is or not intelligence instruments
Communication determine whether to have a power failure, but due to not considering communication path (communication topology), so if the upper Intelligent Instrument of communication
Table can not communicate, then exist and be mistaken for power failure such problems the next intelligence instrument of communication normally works.
The present invention is to complete in order to solve the problems, and its purpose is to provide one kind accurately to detect
The wire breakage detector of broken string in distribution system.
In order to solve the above problems, wire breakage detector of the invention be to from distribution substation via transformer to multiple
The load equipment of party in request carries out the wire breakage detector that the broken string in the distribution system of distribution is detected, and has: communication unit,
It is connect in a manner of it can communicate with the terminal of tabling look-up with communication function set by the prime of load equipment of each party in request,
The survey measured by the terminal of tabling look-up with communication function is received by multi-hop wireless communication from the terminal of tabling look-up with communication function
Measure data；Communication topology analysis portion analyzes each terminal of tabling look-up with communication function according to the measurement data in multi-hop wireless communication
Communication topology；And broken string determination unit determines shape related with the broken string in distribution system according to the communication conditions of communication unit
Condition, among the terminal of tabling look-up with communication function that communication unit can not receive measurement data, for existing in communication topology
In the terminal of tabling look-up with communication function of the upper near communication unit side, communication topology analysis portion is judged to having power failure may
Property, the next the looking into communication function of the terminal of tabling look-up with communication function of power failure possibility is judged as being present in
Meter terminal, communication topology analysis portion are determined as that state is unknown.
According to the present invention, wire breakage detector is to set to from distribution substation via transformer to the load of multiple parties in request
The wire breakage detector that broken string in the standby distribution system for carrying out distribution is detected, has: communication unit, exists with each party in request
Terminal of tabling look-up set by the prime of load equipment with communication function connects in a manner of it can communicate, from communication function
Terminal of tabling look-up receives the measurement data measured by the terminal of tabling look-up with communication function by multi-hop wireless communication；Communication topology
Analysis portion analyzes the communication topology of each terminal of tabling look-up with communication function according to the measurement data in multi-hop wireless communication；And
Break determination unit, according to the communication conditions of communication unit, determines situation related with the broken string in distribution system, communication unit can not
It receives among the terminal of tabling look-up with communication function of measurement data, for being present in communication topology near communication unit side
Upper the terminal of tabling look-up with communication function, communication topology analysis portion is judged to having power failure possibility, for be present in by
The next terminal of tabling look-up with communication function for being judged to having the terminal of tabling look-up with communication function of power failure possibility, communication topology
Analysis portion is determined as that state is unknown, so the broken string in distribution system can be detected accurately.
The purpose of the present invention, feature, scheme and advantage will become brighter by detailed description below and attached drawing
Really.
Detailed description of the invention
Fig. 1 is the figure for showing an example of structure for distribution system involved in embodiments of the present invention 1.
Fig. 2 is the block diagram for showing an example of structure for wire breakage detector involved in embodiments of the present invention 1.
Fig. 3 is the figure for showing an example of distribution wire structured data involved in embodiments of the present invention 1.
Fig. 4 is the figure for showing an example of transformer data involved in embodiments of the present invention 1.
Fig. 5 is an example for showing the terminal data of tabling look-up with communication function involved in embodiments of the present invention 1
Figure.
Fig. 6 is illustrate that the terminal of tabling look-up with communication function involved in embodiments of the present invention 1 communication objective
The figure of one example of the data on ground.
Fig. 7 is the schematic diagram for showing an example of communication topology involved in embodiments of the present invention 1.
Fig. 8 is the process for showing an example of movement for wire breakage detector involved in embodiments of the present invention 1
Figure.
Fig. 9 is the communication topology shown in the case where communication mistake has occurred involved in embodiments of the present invention 1
The schematic diagram of one example.
Figure 10 is an example for showing the movement involved in embodiments of the present invention 1 by the state determination unit of transformer
The flow chart of son.
Figure 11 is the frame for showing an example of structure for wire breakage detector involved in embodiments of the present invention 3
Figure.
Figure 12 is the process for showing an example of movement for wire breakage detector involved in embodiments of the present invention 3
Figure.
(symbol description)
1: distribution substation；2: distribution wire；3: branch point；4: end；5: transformer；6: party in request；7: band communication function
Terminal of tabling look-up；8: load equipment；9: communication sink overall apparatus；10: optical link；11: wire breakage detector；12: communication unit；13:
Data storing unit；14: communication topology analysis portion；15: by the state determination unit of instrument；16: by the state determination unit of transformer；
17: broken string determination unit；18: input unit；19: output section；20: wire breakage detector；21: voltage decline distribution speculates when broken string
Portion.
Specific embodiment
Hereinafter, with reference to the accompanying drawings, illustrating embodiments of the present invention.
<embodiment 1>
<structure of distribution system>
Firstly, illustrating the structure of distribution system.Fig. 1 shows distribution system involved in embodiments of the present invention 1
The figure of one example of structure.
As shown in Figure 1,1 side (source side) of distribution substation 1 connect via power transmission line with power station (not shown).
Distribution wire 2 is connected with to 2 sides of distribution substation 1.Distribution wire 2 is provided at branch point 3 to multiple 2 branches of distribution wire
And it radially spreads.In this way, distribution system becomes radial construction, if from 1 side of distribution substation via branch point 3
Distribution wire 2 is tracked, then eventually arrives at end 4.To the transformer 5 there are many connections of distribution wire 2.2 sides of each transformer 5 and need
The side of asking 6 connects.
In addition, being set as branch point 3 and end 4 is electric pole in present embodiment 1.In addition, being set as transformer 5 is
The pole transformer being arranged on utility poles.
In distribution wire 2, distribution is carried out to electric power with 3 phases exchange (R, S, T).In present embodiment 1, it is set as transformer
5 source side (1 side of distribution substation) is connected with any 2 in 3 phases, to load-side (6 side of party in request) with single phase ac (i.e.
It is any in R-S, S-T, T-R) carry out electric power supply.
Each party in request 6 has the terminal 7 of tabling look-up with communication function in the prime (5 side of transformer) of load equipment 8.Here,
Terminal 7 of tabling look-up with communication function is so-called intelligence instrument, is that can wait to fill with the wire breakage detector 11 being remotely arranged
Set the table look-up device communicated with each other.As long as party in request 6 is supplied to electric power, and does not have communication failure, looking into communication function
Meter terminal 7 can be communicated with each other with wire breakage detector 11.
In addition, the communication about table look-up terminal 7 and wire breakage detector 11 with communication function, is set as passing through multi-hop wireless
Mode carries out as needed via other terminals 7 of tabling look-up with communication function of surrounding via communication sink overall apparatus 9.Communication
Summarizing device 9 can be communicated with multiple terminals 7 of tabling look-up with communication function, can be summarized by each tabling look-up with communication function
The information of power value and voltage value that terminal 7 measures and multi-hop wireless communication in each terminal 7 of tabling look-up with communication function
The information of communication topology, and wire breakage detector is sent via such as communication units such as optical link 10 by the information after summarizing
11。
<structure of wire breakage detector>
Next, illustrating the structure of wire breakage detector 11.Fig. 2 is an example for showing the structure of wire breakage detector 11
The block diagram of son.
As shown in Fig. 2, wire breakage detector 11 have communication unit 12, data storing unit 13, communication topology analysis portion 14, by
The state determination unit 15 of instrument, the state determination unit 16 by transformer, break determination unit 17, input unit 18 and output section 19.
Communication unit 12 is for example realized by Network Interface Unit.Communication unit 12 is via communication sink overall apparatus 9, for band logical
The terminal 7 of tabling look-up of telecommunication function carries out the hair of voltage value data and electric power Value Data (these data are also known as measurement data)
Send request, confirming voltage value data from the terminal 7 of tabling look-up with communication function and electric power Value Data received, whether there is or not (logical
Letter situation).
Data storing unit 13 is for example realized by disk set.Data storing unit 13 store distribution wire structured data,
It transformer data, the terminal data of tabling look-up with communication function, communication topology data and is surveyed by the terminal 7 of tabling look-up with communication function
It measures and the voltage value data received by communication unit 12 and electric current Value Data etc..In addition, about distribution wire structured data, transformer
Data, table look-up terminal data and communication topology data with communication function, are described below.
Communication topology analysis portion 14 for example have CPU (Central Processing Unit, central processing unit) and
DRAM (Dynamic Random Access Memory, dynamic random access memory).Communication topology analysis portion 14 is from by instrument
The state determination unit 15 of table receives the analysis request of communication topology.
Communication topology analysis portion 14 carries out the hair of communication topology data for each communication sink overall apparatus 9 via communication unit 12
Request is sent, the communication topology data of the subordinate of each communication sink overall apparatus 9 are received from each communication sink overall apparatus 9.In addition, communication topology
Analysis portion 14 according to the communication topology data received from communication sink overall apparatus 9 and by instrument state determination unit 15 from each band
The terminal 7 of tabling look-up of communication function receives the reception situation of voltage value data and electric power Value Data, carries out the analysis of communication topology,
For the tabling look-up with communication function of voltage value data and electric power Value Data can not be received by the state determination unit 15 of instrument
State is divided into some in " having power failure possibility " and " state is unknown " by terminal 7.
For example has CPU and DRAM by the state determination unit 15 of instrument.By the state determination unit 15 of instrument from by transformation
The state determination unit 16 of device receives the decision request of the state of each terminal 7 of tabling look-up with communication function.
By the state determination unit 15 of instrument via communication unit 12 and communication sink overall apparatus 9, for each with communication function
Terminal of tabling look-up 7 carries out the transmission request of voltage value data and electric power Value Data, receives from each terminal 7 of tabling look-up with communication function
Voltage value data and electric power Value Data.In addition, being led to by the state determination unit 15 of instrument for communication topology analysis portion 14
Believe topology analysis request, from communication topology analysis portion 14 receive each terminal 7 of tabling look-up with communication function terminal number and
State (" having power failure possibility ", " state is unknown ") is as analysis result.Then, by the state determination unit 15 of instrument according to reception
These data arrived carry out the judgement of the state of each terminal 7 of tabling look-up with communication function.
For example has CPU and DRAM by the state determination unit 16 of transformer.By the state determination unit 16 of transformer from disconnected
Line determination unit 17 receives the decision request of the state of each transformer 5.By the state determination unit 16 of transformer according to the shape for pressing instrument
The judgement of state determination unit 15 is as a result, carry out the judgement of the state of each transformer 5.
Broken string determination unit 17 for example has CPU and DRAM.Determination unit 17 break according to the state determination unit for pressing transformer
16 judgement result come determine broken string the presence or absence of and broken string position (situation related with the broken string in distribution system), will test
As a result it is output to output section 19.
Input unit 18 for example has monitor, keyboard and mouse.The fortune user of wire breakage detector 11 is (hereinafter referred to as
Fortune user) various data are inputted by operation inputting part 18.Data storage is stored by the data that input unit 18 inputs
Portion 13.In addition, in the case where input unit 18 has Network Interface Unit, such as can also be by the outside with progress equipment management
Device communicated and the data storage that receives is to data storing unit 13.
Output section 19 for example has display equipment, printing equipment, disk set, will be determined by broken string determination unit 17 disconnected
The information at the presence or absence of line and position of breaking for example is shown in display equipment.In addition, having network interface dress in output section 19
In the case where setting, the information of the presence or absence of broken string and broken string position can also be sent to external device.
<data mode of distribution system>
Next, illustrating the data mode for indicating construction of distribution system etc..Fig. 3 is show distribution wire structured data one
The figure of a example.
Distribution wire structured data refers to, distribution wire 2 is associated with the electric pole connecting at the both ends of the distribution wire 2
Data.As shown in figure 3, distribution wire structured data includes: distribution wire number, identification and the distribution for uniquely identifying distribution wire 2
The power side wire bar number of the electric pole of source side (1 side of the distribution substation) connection of line 2 and identification and the distribution wire 2
Load-side (6 side of party in request) connection electric pole load side wire bar number.
In Fig. 3, in the case where the source side of distribution wire 2 is not electric pole but distribution substation 1, source side electricity
Line bar number is represented as " S/S ".In addition, same power side wire bar number there are it is multiple in the case where, the source side electricity
The electric pole of line bar number is equivalent to branch point 3.The electric pole only occurred in load side wire bar number is equivalent to end 4.
Fig. 4 is the figure for showing an example of transformer data.
As shown in figure 4, transformer data include: uniquely identify transformer 5 transformer number, identification be provided with the change
The electric pole number of the electric pole of depressor 5 and the transformer 5 are directed to connection phase (the appointing in R-S, S-T, T-R of distribution wire 2
Meaning phase).
Fig. 5 is the figure for showing an example of the terminal data of tabling look-up with communication function.
As shown in figure 5, the terminal data of tabling look-up with communication function includes: to uniquely identify the terminal of tabling look-up with communication function
The transformer of the transformer 5 of 7 terminal number and identification and the connection of terminal 7 of tabling look-up with communication function is numbered.
About distribution wire structured data, transformer data and the tabling look-up with communication function illustrated in above-mentioned Fig. 3~5
Terminal data is set as fortune user and inputs and stored to data storing unit 13 from input unit 18.In addition, having network in input unit 18
It, can also (such as distribution supervisor control or distribution be set from the system of external distribution system in the case where interface arrangement
Standby management system) it obtains distribution wire structured data, transformer data and tabling look-up with communication function and terminal data and is stored into
Data storing unit 13.
In addition, for example due to construction etc. and the construction of distribution system be changed in the case where, user is from input unit 18 for fortune
Carry out addition/change of distribution wire structured data, transformer data and the terminal data of tabling look-up with communication function.In addition,
In the case that input unit 18 has Network Interface Unit, addition/change can also be obtained from the system of external distribution system
Distribution wire structured data, transformer data and the terminal data of tabling look-up with communication function.
<data mode of communication path>
Next, illustrating the data mode for indicating construction of communication path etc..Fig. 6 is to illustrate that looking into communication function
The figure of one example of the data of the communications destination of meter terminal 7.
As shown in fig. 6, the data for indicating the communications destination of the terminal 7 of tabling look-up with communication function include: to uniquely identify
The terminal number of terminal 7 of tabling look-up with communication function and to become the terminal 7 of tabling look-up with communication function communications destination
Other table look-up terminal 7 or communication sink overall apparatus 9 with communication function identified communications destination number.
Be shown below situation in the example of fig. 6: the terminal 7 of tabling look-up with communication function of terminal number P10000031 will
The data of itself are sent to the terminal 7 of tabling look-up with communication function of communications destination number P10000021, terminal number
The terminal 7 of tabling look-up with communication function of P10000021 is by the terminal 7 of tabling look-up with communication function of terminal number P10000031
Data are sent to the terminal 7 of tabling look-up with communication function of communications destination number P10000011, terminal number P10000011's
Terminal 7 of tabling look-up with communication function sends the data of the terminal 7 of tabling look-up with communication function of terminal number P10000031 to logical
Believe the communication sink overall apparatus 9 of destination number C10001.That is, the terminal 7 of tabling look-up with communication function of terminal number P10000031
By the data of itself, via table look-up terminal 7 and the terminal number with communication function of terminal number P10000021
The tabling look-up terminal 7 and being sent to communication sink overall apparatus 9 with communication function of P10000011.
In this way, above-mentioned multi-hop wireless mode is the terminal 7 of tabling look-up with communication function via other tabling look-up with communication function
Terminal 7 and the mode carried out wireless communication with communication sink overall apparatus 9.In Fig. 7, expression band communication function shown in fig. 6 is used
The data of communications destination of terminal 7 of tabling look-up schematically show communication topology.In Fig. 7, such as with communication function
Terminal of tabling look-up 7K sends the measurement data of the terminal 7K that tables look-up with communication function to the terminal 7E that tables look-up with communication function.It connects
Get off, the terminal 7E that tables look-up with communication function communicates function by the measurement data of the terminal 7K that tables look-up with communication function and via band
The information of the meaning of the terminal 7E that tables look-up of energy is sent to the terminal 7A that tables look-up with communication function.Next, looking into communication function
Meter terminal 7A by the measurement data of the terminal 7K that tables look-up with communication function, via the meaning of the terminal 7E that tables look-up with communication function
Information and communication sink overall apparatus 9 is sent to via the information of the meaning of the terminal 7A that tables look-up with communication function.Communication sink as a result,
Overall apparatus 9 receives the measurement data of the terminal 7K that tables look-up with communication function and the measurement of the terminal 7K that tables look-up with communication function
Data successively via table look-up terminal 7E and the terminal 7A that tables look-up with communication function with communication function the meaning information.In this way,
Communication sink overall apparatus 9 summarizes the communication topology of multi-hop wireless communication.
<movement>
Next, illustrating the movement of wire breakage detector 11.Fig. 8 is the detection for showing wire breakage detector 11 and breaking
Movement an example flow chart.In addition, being set as carrying out with predetermined period (such as every 10 minutes) shown in Fig. 8
Movement.
In step s 11, communication topology analysis portion 14 analyzes communication topology.Specifically, communication topology analysis portion 14
According to the communication topology data that are received from communication sink overall apparatus 9 and by instrument state determination unit 15 from each with communication function
Terminal of tabling look-up 7 receives the reception situation of voltage value data and electric power Value Data, analyzes communication topology.Then, communication topology is analyzed
Portion 14 is in the band logical that can not be communicated and (can not receive voltage value data and electric power Value Data by the state determination unit 15 of instrument)
Among the terminal 7 of tabling look-up of telecommunication function, determine in communication topology in the upper (communicate upper) nearest with communication sink overall apparatus 9
Locate the existing terminal 7 of tabling look-up with communication function.The state of the terminal 7 of tabling look-up with communication function determined at this time is judged as
" having power failure possibility ".In addition, being present in compared with the terminal 7 of tabling look-up with communication function for being judged as " having power failure possibility "
The communication the next terminal 7 of tabling look-up with communication function is it is not clear whether had a power failure, so the terminal 7 of tabling look-up with communication function
State is judged as " state is unknown ".
Fig. 9 is the schematic diagram for showing an example of the communication topology in the case where communication mistake has occurred.In Fig. 9,
The terminal 7E that tables look-up with communication function, the terminal 7J that tables look-up with communication function, tabling look-up with communication function of blacking expression are shown
Terminal 7K, the terminal 7Q and terminal 7R that tables look-up with communication function that tables look-up with communication function are the state determination units 15 by instrument
Voltage value data and electric power Value Data can not be received via communication unit 12 and communication sink overall apparatus 9, and (communication unit 12 can not be true
Recognize the reception of data) the terminal 7 of tabling look-up with communication function.
As shown in figure 9, in the terminal of tabling look-up with communication function that can not receive voltage value data and electric power Value Data
7E, the terminal 7J that tables look-up with communication function, the terminal 7K that tables look-up with communication function, table look-up terminal 7Q and band with communication function
Among the terminal 7R that tables look-up of communication function, the terminal 7E that tables look-up with communication function is due to nearest with communication sink overall apparatus 9,
A possibility that power failure, is high, is determined as " having power failure possibility ".On the other hand, other table look-up terminal 7J, band logical with communication function
The terminal 7K that tables look-up of telecommunication function, the terminal 7Q and terminal 7R that tables look-up with communication function that tables look-up with communication function are due to wanting warp
It, all can not be into so whether having had a power failure by there is the terminal 7E that tables look-up with communication function for a possibility that having had a power failure to be communicated
Row communication.Therefore, the terminal 7J that tables look-up with communication function, the terminal 7K that tables look-up with communication function, tabling look-up end with communication function
The end 7Q and terminal 7R that tables look-up with communication function is determined as " state is unknown ".
Back to Fig. 8, in step s 12, each terminal 7 of tabling look-up with communication function is determined by the state determination unit 15 of instrument
State.Specifically, analyzing the voltage received from each terminal 7 of tabling look-up with communication function by the state determination unit 15 of instrument
Value Data determines that voltage drops to the predetermined threshold value terminal 7 of tabling look-up below with communication function, the band communication of the determination
The terminal 7 of tabling look-up of function is determined as " voltage decline ".In addition, being set as having been generally acknowledged that electric voltage exception in the setting of threshold value
The 90% of value, for example normal voltage value.Threshold value can both be previously set and (acquiescently set), can also be by transporting user from input
Portion 18 is as a parameter to inputting and setting.
It will not be judged to " having power failure can by communication topology analysis portion 14 in step s 11 by the state determination unit 15 of instrument
Can property " and " state is unknown " and it is not determined as that the terminal 7 of tabling look-up with communication function of above-mentioned " voltage decline " is determined as
" normal ".
According to the above, respectively the terminal 7 of tabling look-up with communication function is judged as " having power failure possibility ", " state is unknown ", " electricity
Free position in drops " or " normal ".
In step s 13, the state of each transformer 5 is determined by the state determination unit 16 of transformer.Specifically, pressing transformation
The state determination unit 16 of device according to the terminal data of tabling look-up (referring to Fig. 5) with communication function being stored in data storing unit 13,
Determine the terminal 7 of tabling look-up with communication function connecting with each transformer 5.Then, by the state determination unit 16 of transformer according to figure
It is acted shown in 10, determines the state of each transformer 5.
Figure 10 is the flow chart for showing an example of movement for the state determination unit 16 by transformer.
In the step s 21, judge by the state determination unit 16 of transformer in the looking into communication function being connect with transformer 5
The terminal 7 of tabling look-up with communication function of " normal " is judged as among meter terminal 7 even with the presence or absence of 1.It is being judged as " just
The terminal 7 of tabling look-up with communication function often " is transferred to step S22 even there are in the case where 1.On the other hand, it is being determined
For " normal " tabling look-up 71, terminal with communication function be all not present in the case where, be transferred to step S23.
In step S22, it is determined as and is judged as the band communication function of " normal " by the state determination unit 16 of transformer
Table look-up terminal 7 connection transformer 5 be " normal ".
In step S23, judge by the state determination unit 16 of transformer in the looking into communication function being connect with transformer 5
The terminal 7 of tabling look-up with communication function of " voltage decline " is judged as among meter terminal 7 even with the presence or absence of 1.It is being determined
For " voltage decline " the terminal 7 of tabling look-up with communication function even there are in the case where 1, be transferred to step S24.Another party
Face is transferred to step in the case where the tabling look-up 71, terminal with communication function for being judged as " voltage decline " is all not present
Rapid S25.
In step s 24, it is judged to communicating with the band for being judged as " voltage decline " by the state determination unit 16 of transformer
The transformer 5 " voltage decline " of the connection of terminal 7 of tabling look-up of function.
In step s 25, judge by the state determination unit 16 of transformer in the looking into communication function being connect with transformer 5
The terminal 7 of tabling look-up with communication function of " having power failure possibility " is judged as among meter terminal 7 even with the presence or absence of 1.In quilt
It is determined as that the terminal 7 of tabling look-up with communication function of " having power failure possibility " even there are in the case where 1, is transferred to step S26.
On the other hand, the case where 71, the terminal of tabling look-up with communication function for being judged as " having power failure possibility " is all not present
Under, it is transferred to step S27.
In step S26, it is determined as and is judged as the band of " having power failure possibility " by the state determination unit 16 of transformer
The transformer 5 " power failure " of the connection of terminal 7 of tabling look-up of communication function.
In step s 27, it is determined as that the state of transformer 5 is " unknown " by the state determination unit 16 of transformer.
Back to Fig. 8, in step S14, broken string determination unit 17 determines the broken string in distribution system.Specifically, broken string
Determination unit 17 makes in distribution system and stops according to the state of each transformer 5 determined by the state determination unit 16 of transformer
Electricity and the distribution map (or distribution table) of voltage decline, determine whether these distributions are as caused by breaking.
More specifically, broken string determination unit 17 is according to the connection phase for including in transformer data shown in Fig. 4, in distribution
The end side of a part of system, if (in Fig. 4, connection is mutually for R-S's or T-R for the transformer 5 being for example connected with R
Transformer 5) power failure or voltage decline is presented, then it is judged to breaking in the source side R phase of the transformer 5.
In addition, from the end side of above-mentioned a part present have a power failure or voltage decline transformer 5 among near
In the case that the transformer 5 of nearly source side has the normal transformer 5 of presentation to source side, broken string determination unit 17 is determined as 2
Between platform transformer 5 (transformer 5 of the most source side of power failure or voltage decline is presented and normal transformer 5 is presented)
In the presence of broken string position.
In addition, from the end side of above-mentioned a part present have a power failure or voltage decline transformer 5 among near
For the transformer 5 of nearly source side to source side there is no in the case where the normal transformer 5 of presentation, broken string determination unit 17 is determined as phase
Than there is broken string position in source side in the transformer 5 near source side that power failure or voltage decline is presented.
It will be apparent from the above that according to the present embodiment 1, the use in load equipment 8 can be collected using party in request 6
Amount of power and the terminal of tabling look-up with communication function being arranged accurately detect the presence or absence of broken string in distribution system and broken string
Position.In addition, according to whether there is or not the communication response from the terminal of tabling look-up with communication function come detect broken string position, so without pair
Terminal of tabling look-up with communication function carries the battery for being communicated when having a power failure.Therefore, disconnection portion can inexpensively be carried out
The detection of position.In the case where wire breakage detector 11 is judged to having broken string, fortune user can quickly send for broken string position
Operator or in order to get an electric shock or the public disasters such as fire are prevented trouble before it happens and shutter is made to open a way or with other means
The periphery at investigation broken string position in more detail.
<embodiment 2>
Embodiments of the present invention 2 are characterized in that, preassigned transformer 5 is excluded from the determine object of state.
Other structures are identical as embodiment 1, so in this description will be omitted.Hereinafter, being set as burn out detection involved in present embodiment 2
Device is wire breakage detector 11 shown in Fig. 2 and is illustrated.
For example, will identify the transformation of the transformer 5 about the transformer 5 for becoming to have a power failure due to failure or construction etc.
Device number is prestored to data storing unit 13 as transformer data in stopping.
Next, illustrating the movement of wire breakage detector 11 involved in present embodiment 2.In addition, 2 institute of present embodiment
The movement for the wire breakage detector 11 being related to is characterized in that the processing of the step S13 of Fig. 8, the step S13's of following explanatory diagram 8
Processing.Other processing (step S11, the step S12 and step S14 of Fig. 8) are identical as embodiment 1, say so omitting herein
It is bright.
In the step S13 of Fig. 8, state determination unit 16 by transformer is referring to being stored in advance in data storing unit 13
Transformer data in stopping exclude the transformer 5 of known power failure from the determine object of state.
In addition, the case where transformer 5 of transformer data becomes charged state in being stored as stopping is (that is, from power failure
The case where recovery) under, identify that the transformer of the transformer 5 is numbered from deleting in transformer data in stopping.
It will be apparent from the above that according to the present embodiment 2, by excluding from the determine object of state due to construction or failure
Deng and the transformer 5 of previously known power failure, so as to prevent broken string erroneous judgement.Therefore, it can be improved the detection accuracy of broken string.
<embodiment 3>
<structure>
Firstly, illustrating the structure of wire breakage detector involved in embodiments of the present invention 3.Figure 11 is to show this implementation
The block diagram of one example of the structure of wire breakage detector 20 involved in mode 3.
As shown in figure 11, wire breakage detector 20 involved in present embodiment 3 is characterized in that, voltage when having broken string
Decline distribution estimating unit 21.Other structures are identical as wire breakage detector 11 involved in embodiment 1 (referring to Fig. 2), so
In this description will be omitted.
Voltage decline distribution estimating unit 21 for example has CPU and DRAM when broken string.Voltage decline distribution speculates when broken string
Portion 21 according to be stored in data storing unit 13 immediately in front of normal when voltage declines (do not have a power failure and) band
The electric power Value Data of the terminal 7 of tabling look-up of communication function, thus it is speculated that the voltage decline in the case where each position of distribution system is broken
Distribution.
<movement>
Next, illustrating the movement of wire breakage detector 20.Figure 12 is the inspection for showing wire breakage detector 20 and breaking
The flow chart of one example of the movement of survey.In addition, being set as shown in Figure 12 movement with (such as every 10 points of the predetermined period
Clock) it carries out.In addition, step S31~step S33 of Figure 12 is corresponding with the step of Fig. 8 S11~step S13, said so omitting herein
It is bright.Hereinafter, illustrating step S34 and step S35.
In step S34, voltage decline distribution estimating unit 21 speculates the feelings to break at each position of distribution system when broken string
The distribution of voltage decline under condition.Specifically, voltage decline distribution estimating unit 21 is according to being stored in data storing unit when broken string
Distribution wire structured data (referring to Fig. 3), transformer data (referring to Fig. 4) in the 13, (ginseng of the terminal data of tabling look-up with communication function
According to Fig. 5), the electric power Value Datas of communication topology data and the terminal 7 of tabling look-up with communication function when immediately in front of normal,
Speculate the distribution of the voltage decline in the case where each position of distribution system is broken.
Here, an example of the estimation method of the distribution of account for voltage decline.For example, becoming in the end of distribution wire 2
It, should if broken in source side R phase in the case that R phase and S in 3 line of the phase of depressor 5 and 3 (R phase, S phase, T-phase) are connected
Transformer 5 (transformer 5 being connected with R phase and S, hereinafter referred to as R-S transformer 5) has a power failure.But in R-S transformer 5
There is the transformer 5 (hereinafter referred to as R-T transformer 5) connecting with R phase and T-phase in load-side (direction opposite with source side)
In the case of, even if breaking in source side R phase, the voltage between S phase and T-phase is still remained, though so the R-T transformer 5 sometimes
Right voltage declines but does not have a power failure.Such phenomenon is speculated immediately in electric power Value Data before using in each transformer 5.
This will be set as by each the total of power value that terminal 7 is measured of tabling look-up with communication function connecting with transformer 5
The power value of transformer 5.For example, be set as in above-mentioned R-S transformer 5 immediately in power value before be 20kW, and R-T transformation
In device 5 immediately in power value before be 30kW.At this time, it is assumed that the load of same resistance is according to the ratio of power value and by simultaneously
The connection of connection ground.That is, being set as that the negative of same resistance is connected in parallel with the ratio of R-S transformer 5:R-T transformer 5=20:30
It carries.
Herein, it is contemplated that the case where R phase breaks at the front of R-S transformer 5.Assuming that from the broken string position to load-side
It is that (imagine R is from broken string to 3/5R by the resistance of 2 sides of the R-S transformer 5 that 2/5 in whole power value 50kW consumes
Position to load-side resistance value), residual voltage be 3/5V (voltage when V is normal).On the other hand, it is assumed that from broken string position
Resistance to 2 sides of the R-T transformer 5 for consuming 3/5 in whole power value 50kW of load-side is 2/5R, remaining
Voltage is 2/5V.Utilize such simple hypothesis, thus it is speculated that 1 line broken string is produced in each phase at each position of distribution system
In the case of voltage decline distribution.But the electric power about the terminal 7 of tabling look-up with communication function utilized in the supposition
Value, need using will generate power failure or voltage decline before it is normal in the state of value.
Among the above, to put it more simply, to be connected from broken string and connect mutually different transformers 5 compared to disconnection portion
Position and respectively to there is 1 the case where in end side be that an example is illustrated, but there are 2 or more in the transformer of same phase 5
In the case where, each transformer 5 for being set as same phase connects parallel with one another, summarizes the transformer 5 of same phase and is considered as 1 transformer 5
It calculates, thus allows for supposition similar to the above.
In step s 35, broken string determination unit 17 determines the broken string in distribution system.Specifically, determination unit 17, broken string
According to the state of each transformer 5 determined by the state determination unit 16 of transformer, the power failure in distribution system and voltage are made
The distribution table (hereinafter referred to as distribution table) of decline.In addition, broken string determination unit 17 is according to the voltage decline point in step S34 interrupt line
The distribution of voltage that cloth estimating unit 21 deduces decline, under voltage when making the broken string under each phase at each position of distribution system
The distribution of drop speculates table (hereinafter referred to as distribution speculates table).Then, broken string determination unit 17 compares distribution table and distribution speculates table, root
The presence or absence of broken string and broken string position are determined according to the similar degree of the two.
But power failure is due to caused by voltage decline, so the case where some transformer 5 is compareed
Under, if indicating to have a power failure in distribution table, speculating in distribution indicates voltage decline in table, then is determined as the state of the transformer 5
Unanimously.
Broken string determination unit 17 in, about some transformer 5 by distribution table and distribution supposition table compareed as a result,
It, will if more than consistent or similar extremely predetermined threshold value being determined as there is broken string (if similar degree is threshold value or more)
With it is consistent or it is most similar broken string situation it is corresponding break position as break position the first candidate and be presented to output section
19.In addition, broken string determination unit 17 rearranges other broken string situations according to the sequence of similar degree from high to low, and according to similar
Degree sequence from high to low, as broken string position candidate and be presented to output section 19.
In addition, broken string determination unit 17 is determined as no broken string in the case where the similar degree of all broken string situations is less than threshold value.
In addition, can both be previously set and (acquiescently set) about threshold value, it can also be by fortune user from input unit 18 as a parameter to defeated
Enter and sets.
It will be apparent from the above that according to the present embodiment 3,1 is produced in each phase at each position of distribution system by speculating
The distribution of voltage decline in the case where line broken string, can be improved the detection accuracy of broken string.In addition, sentencing in wire breakage detector 20
It is set in the case where having broken string, fortune user can quickly send operator or for broken string position in order to get an electric shock or fire
Equal public disasters prevent trouble before it happens and make shutter open circuit or investigate the periphery at broken string position in more detail with other means.
In addition, the present invention can freely combine each embodiment or within the scope of the invention to each embodiment
It is suitably deformed, omits.
Although the present invention is described in detail, above description only illustrates in all respects, and the invention is not limited thereto.Ying Li
Solution for do not depart from the scope of the present invention and it is conceivable that the countless variations not illustrated.
Claims (13)
1. a kind of wire breakage detector is to the load from distribution substation (1) via transformer (5) to multiple parties in request (6)
Equipment (8) carries out the wire breakage detector (11) that the broken string in the distribution system of distribution is detected, which is characterized in that has:
Communication unit (12), with each party in request (6) with communication function set by the prime of the load equipment (8)
Terminal of tabling look-up (7) connects in a manner of it can communicate, passes through multi-hop wireless communication from the terminal of tabling look-up (7) with communication function
The measurement data measured come the terminal of tabling look-up (7) received by described with communication function；
Communication topology analysis portion (14) analyzes each band communication according to the measurement data in the multi-hop wireless communication
The communication topology of the terminal of tabling look-up (7) of function；And
Break determination unit (17), according to the communication conditions of the communication unit (12), judgement has with the broken string in the distribution system
The situation of pass,
Among the terminal of tabling look-up (7) with communication function that the communication unit (12) can not receive the measurement data,
For being present in the looking into communication function of the upper near the communication unit (12) side in the communication topology
Meter terminal (7), the communication topology analysis portion (14) are judged to having power failure possibility, for be present in be judged as it is described have stop
The next terminal of tabling look-up (7) with communication function of the terminal of tabling look-up (7) with communication function of electric possibility, it is described
Communication topology analysis portion (14) is determined as that state is unknown.
2. wire breakage detector according to claim 1, which is characterized in that
In the distribution system, the power transmission from the distribution substation (1) to the transformer (5) is carried out with 3 intersection streams,
The distribution substation (1) side of the transformer (5) is connected with any 2 in 3 phases.
3. wire breakage detector according to claim 2, which is characterized in that
The wire breakage detector is also equipped with the state determination unit (15) by instrument, should be by state determination unit (15) basis of instrument
It the voltage value data that includes in the measurement data that the communication unit (12) receives and is analyzed by the communication topology
The communication topology that portion (14) provides analyzes the state as a result, each terminal of tabling look-up (7) with communication function of judgement,
The state determination unit (15) by instrument is according to the voltage value data, for measuring predetermined threshold value or less
Voltage the terminal of tabling look-up (7) with communication function, be determined as voltage decline.
4. wire breakage detector according to claim 3, which is characterized in that
The state determination unit (15) by instrument is not for being determined as the voltage decline and being analyzed by the communication topology
Portion (14) is not judged to having the power failure possibility and the unknown terminal of tabling look-up (7) with communication function of the state,
It is determined as normal.
5. wire breakage detector according to claim 4, which is characterized in that
The wire breakage detector is also equipped with the state determination unit (16) by transformer, should be by the state determination unit (16) of transformer
According to the judgement by the terminal of tabling look-up (7) with communication function provided by the state determination unit (15) of instrument as a result,
Determine the state of each transformer (5).
6. wire breakage detector according to claim 5, which is characterized in that
The state determination unit (16) by transformer for by it is described be determined as by the state determination unit (15) of instrument it is described
The transformer (5) of normal terminal of tabling look-up (7) connection with communication function, is determined as normal.
7. wire breakage detector according to claim 6, which is characterized in that
The state determination unit (16) by transformer is not for being determined as institute by the state determination unit (15) of instrument with by described
The transformer (5) for stating terminal of tabling look-up (7) connection with communication function that is normal and being determined as the voltage decline, sentences
It is set to voltage decline.
8. wire breakage detector according to claim 7, which is characterized in that
The state determination unit (16) by transformer is not for being determined as institute by the state determination unit (15) of instrument with by described
It states the normal and described voltage decline and is judged to having the terminal of tabling look-up (7) with communication function of the power failure possibility to connect
The transformer (5) connect, is judged to having a power failure.
9. wire breakage detector according to claim 8, which is characterized in that
The state determination unit (16) by transformer is not for being determined as institute by the state determination unit (15) of instrument with by described
It states normal, the described voltage decline and has the terminal of tabling look-up with communication function of the free position in the power failure possibility
(7) transformer (5) connected, is determined as unknown.
10. wire breakage detector according to claim 8, which is characterized in that
Broken string determination unit (17) is based on according to the transformer determined by the state determination unit (16) by transformer
(5) distribution of state and the power failure and voltage decline in the distribution system that makes, determines the distribution
The presence or absence of broken string in system and broken string position.
11. wire breakage detector according to claim 5, which is characterized in that
The state for not determining the predetermined transformer (5) by the state determination unit (16) of transformer.
12. wire breakage detector according to claim 10, which is characterized in that
Voltage decline distribution estimating unit (21) when the wire breakage detector is also equipped with broken string, voltage decline distribution pushes away when the broken string
It is wrapped in the newest measurement data according to the terminal of tabling look-up (7) with communication function when described normal in survey portion (21)
The electric power Value Data contained, thus it is speculated that in the distribution system in the case where making the predetermined position of the distribution system break
Voltage decline distribution.
13. wire breakage detector according to claim 12, which is characterized in that
Broken string determination unit (17) is according to the transformer (5) determined by the state determination unit (16) by transformer
State and the distribution of the power failure and voltage decline in the distribution system that makes with by electric when the broken string
Similar degree between the distribution of voltage decline in the distribution system that drops distribution estimating unit (21) deduces is preparatory
In the case where more than determining threshold value, it is determined as there is the broken string.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016053260 | 2016-03-17 | ||
| JP2016-053260 | 2016-03-17 | ||
| PCT/JP2016/083545 WO2017158921A1 (en) | 2016-03-17 | 2016-11-11 | Disconnection detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109075608A true CN109075608A (en) | 2018-12-21 |
Family
ID=59850792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680083400.0A Pending CN109075608A (en) | 2016-03-17 | 2016-11-11 | Wire breakage detector |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6552715B2 (en) |
| CN (1) | CN109075608A (en) |
| MY (1) | MY180522A (en) |
| WO (1) | WO2017158921A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019161859A (en) * | 2018-03-13 | 2019-09-19 | オムロン株式会社 | Distribution network monitoring system |
| JP6896149B2 (en) * | 2018-03-16 | 2021-06-30 | 三菱電機株式会社 | Voltage deviation detector |
| CN113762414B (en) * | 2021-10-13 | 2023-11-03 | 国网福建省电力有限公司营销服务中心 | Time-sharing shunt power-off transformer area topology checking method |
| JP7420324B1 (en) | 2022-08-09 | 2024-01-23 | 三菱電機株式会社 | Distribution system management device, distribution system management method, and distribution system management system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009118541A (en) * | 2007-11-01 | 2009-05-28 | Chugoku Electric Power Co Inc:The | Power supply state collection system |
| CN102213740A (en) * | 2011-04-13 | 2011-10-12 | 朱珂 | Middle-high voltage electric power circuit fault detection method and system of unilateral power supply under power failure state |
| WO2014024665A1 (en) * | 2012-08-08 | 2014-02-13 | 株式会社日立製作所 | Method of detecting disconnection accident in distribution system, and distribution facility management system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5854953B2 (en) * | 2012-08-29 | 2016-02-09 | 三菱電機株式会社 | Disconnection detector |
| JP2014150640A (en) * | 2013-01-31 | 2014-08-21 | Chugoku Electric Power Co Inc:The | Detection system of accident power outage and distribution facility fault |
-
2016
- 2016-11-11 CN CN201680083400.0A patent/CN109075608A/en active Pending
- 2016-11-11 JP JP2018505233A patent/JP6552715B2/en not_active Expired - Fee Related
- 2016-11-11 WO PCT/JP2016/083545 patent/WO2017158921A1/en active Application Filing
- 2016-11-11 MY MYPI2018703075A patent/MY180522A/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009118541A (en) * | 2007-11-01 | 2009-05-28 | Chugoku Electric Power Co Inc:The | Power supply state collection system |
| CN102213740A (en) * | 2011-04-13 | 2011-10-12 | 朱珂 | Middle-high voltage electric power circuit fault detection method and system of unilateral power supply under power failure state |
| WO2014024665A1 (en) * | 2012-08-08 | 2014-02-13 | 株式会社日立製作所 | Method of detecting disconnection accident in distribution system, and distribution facility management system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6552715B2 (en) | 2019-07-31 |
| MY180522A (en) | 2020-12-01 |
| JPWO2017158921A1 (en) | 2018-09-27 |
| WO2017158921A1 (en) | 2017-09-21 |
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