CN207652034U - A kind of aftercurrent action protecting equipment based on LORA wireless communication techniques - Google Patents
A kind of aftercurrent action protecting equipment based on LORA wireless communication techniques Download PDFInfo
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- CN207652034U CN207652034U CN201721905829.1U CN201721905829U CN207652034U CN 207652034 U CN207652034 U CN 207652034U CN 201721905829 U CN201721905829 U CN 201721905829U CN 207652034 U CN207652034 U CN 207652034U
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Abstract
The utility model is related to a kind of aftercurrent action protecting equipments based on LORA wireless communication techniques; including terminal device, LoRa gateways, distribution transformer terminals and main equipment; LoRa modules are respectively connected in multiple terminal devices; the LoRa modules are connect by built-in chip type or RS485 interfaces with terminal device; multiple terminal devices are carried out data transmission by LoRa wireless networks and LoRa gateways; carried out data transmission by RS485 networks between the LoRa gateways and distribution transformer terminals, is carried out data transmission by GPRS signals between the distribution transformer terminals and main equipment.The utility model is simple in structure, the high communication quality.
Description
Technical field
The utility model is related to a kind of aftercurrent action protecting equipments based on LORA wireless communication techniques.
Background technology
Power distribution station supply district is more dispersed at present, and supply path is long, and the responsible range of taiwan area manager is bigger,
When low-voltage equipment failure has a power failure, repair personnel requires a great deal of time and energy investigates fault point, greatly
Big reliability, safety and the stability for reducing residential electricity consumption.
With rural economy, culture, the continuous improvement of living standard, wast rural area is to power supply scale, power supply capacity, power supply
Quality has the demand of high quality, and the power supply quality in rural area is not singly a kind of market behavior, it is related to the steady of wast rural area
The problem of determining, being also related to Science in Future in China sustainable development, thus it is possible to which no safeguard rural power grids and be to rural area normal power supply
The Duty demands of power supply department.
Currently, there is also cannot find, locate in time in time for the unit exception of distribute-electricity transformer district, trouble shoot, maintenance management etc.
The problem of reason.It is mainly reflected in following several respects：
(1) electric network composition in rural area is weak.Rural power grids are mostly radiation network, and ring network power supply range is small, load transfer ability
Difference, accident, scope of power outage are big, and power supply reliability is poor.
(2) power quality is low.With rural power grids power load rapid development, existing medium voltage distribution network is because conducting wire is thin, returns
Road is few, and distribution transforming is layouted the factors such as insufficient, reactive compensation capacity shortcoming, and rate of qualified voltage is generally relatively low, and the low pressure of rural power grids is caused to set
It is standby to be not normally functioning, reduce the safety of electricity consumption.
(3) equipment is outmoded, the general level of the health is low, safety and poor reliability.Lack integrated management, management level is low.Due to
Management level is low, can not prejudge failure in advance, and Frequent Troubles cause certain economic loss.
(4) lack of long-term planning is busy with dealing with Problems Existing.It is planned due to lacking, the distribution transformer distribution of rural power grids is not
Rationally, low-pressure line-outgoing circuit is full of twists and turns, and the failure for directly contributing rural power grids electric power transmission line circuit is occurred frequently.
Controller switching equipment in distribute-electricity transformer district is acquired with distribution transformer terminals communication information mainly with GPRS/CDMA, carrier wave, small wireless
Collection, which is copied, to be waited based on communication modes, in existing communication modes, is responsible for acquiring the real time data of communication apparatus by trunk module, be passed through
GPRS transmission is cascaded to communication adapter, then by communication adapter and distribution transformer terminals, and master is transferred data to by distribution transformer terminals
It stands system.Leakage protects equipment with trunk module because using 485 communications such as in Zhejiang Province's residual current action protector monitoring system
Mode, warning information must be acquired by trunk module, be cannot achieve abnormal active alarm truly, affected system
Real-time；It is protected due to family and communication is not implemented, affect the implementation for communicating " last one kilometer " channel in low voltage electric network；Distribution transforming platform
The equipment such as temperature controller, access controller, intelligent capacitor controller in area are mainly based on wired RS485 communication modes.It is practical
In, collector communication failure is more, and installation and debugging are complicated, and trouble shoot difficulty is big, installs communication apparatus additional and causes in-site installation
Situations such as difficulty, field installation process unsightly, influence look of a village village looks, and O＆M difficulty is big.These communication modes, which exist simultaneously, to be made
Huge complicated at communication system, cumbersome, data acquisition success rate is not high, and data block seriously, and there is communication rate height
Drawback high, O＆M difficulty is big；The problems such as leakage protects equipment there are panel operation complexity, each producer's panel setting differentiation, increases
The use difficulty of basic staff, meanwhile, when leakage is protected, and tripping fault occurs, there are service personnel's fault location to expend duration,
The problems such as overhaul efficiency is low.
Monitoring device in rural power grids distribute-electricity transformer district includes mainly temperature controller, access controller, intelligent capacitor controller etc., this
A little equipment are mainly cascaded with wired RS485 and distribution transformer terminals, and distribution transformer terminals carry out data acquisition and teletransmission to these monitoring devices
Main station system.In practical application, because using wired mode, communication apparatus causes in-site installation difficult, and O＆M difficulty is big etc. is installed additional
Problem.
These communication modes exist simultaneously, and cause communication system huge complicated, cumbersome, and data acquire success rate not
Height, data block the problems such as serious, and there is the communication drawback that rate are high, O＆M difficulty is big.
Currently, the acquisition system of electric energy meter is to separate with rural power grids residual current action protector monitoring system, electric energy meter
Acquisition is mainly copied etc. with GPRS/CDMA, carrier wave, small wireless collection based on communication modes.In actual use, carrier communication be easy by
Power utilization environment interferes, and meter reading is caused to fail；And the small wireless collection that current market uses is copied mainly based on zigbee communication modes,
Because zigbee communication distances are limited, generally at 200 meters or so, practical ranges are seriously limited.GPRS/CDMA communication parties
Formula, there is also some drawbacks, such as in remote mountain areas, and signal may cover not exclusively or signal is weaker, also can all cause
Meter reading fails, and influences system function.Meanwhile using GPRS/CDMA communication modes, post and telecommunication tariff is also that a no small fund is paid
Go out.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of simple in structure, high communication quality
The aftercurrent action protecting equipment based on LORA wireless communication techniques.
To achieve the goals above, the utility model uses technical solution below：
A kind of aftercurrent action protecting equipment based on LORA wireless communication techniques, it is characterised in that：It is set including terminal
Standby, LoRa gateways, distribution transformer terminals and main equipment are respectively connected with LoRa modules in multiple terminal devices, and the LoRa modules pass through
Built-in chip type or RS485 interfaces are connect with terminal device, multiple terminal devices by LoRa wireless networks and LoRa gateways into
Row data transmission is carried out data transmission between the LoRa gateways and distribution transformer terminals by RS485 networks, the distribution transformer terminals and
Carried out data transmission by GPRS signals between main equipment.
Preferably：The terminal device include temperature controller, intelligent capacitor controller, protector, electric energy meter or
Access controller.
The utility model is LPWAN (low-power consumption wide area network) wireless communication technique using newest Internet of Things LORA, it goes out
It now changes and considers mode about the compromise of transmission range and power consumption in the past, long distance can simply be realized by providing one kind to the user
From, the system of long battery life, large capacity, and then extend sensing network.
Supply voltage quality can be improved in the implementation of the utility model, improves power supply reliability, power consumption management water is substantially improved
It is flat, while there is splendid economic benefit.1) power loss is reduced, can reduce the power loss of feeder ear and user terminal, 2) it carries
The power factor (PF) of high taiwan area, reduces the generation of low-voltage, 3) load capacity for improving circuit, for the lower line of capacity-load ratio
Road extends its service life, reduces improvement expenses, and 4) distribution transforming three-phase imbalance rate is reduced, and therefore reduce power distribution network
Running wastage, while improve low-voltage platform area operation safety, extend the service life of low-voltage platform area equipment.5) shorten circuit
Trouble shooting time substantially reduces labor intensity, improves power supply quality and reliability, reduces loss of outage.
The more potential professions of guiding are carried out skill by the promotion and application of the utility model using LoRa wireless communication techniques
Art is reformed, and the replacement of a large amount of cables, collector, accessory power supply and tank material is saved, and realizes the " complete of intellective protector communication
Covering, full monitoring, full early warning, full guard ", in conjunction with fine work taiwan area construction, improves the aesthetics of low-voltage power facility, power-assisted village
Hold the rectification of village's looks, General Promotion rural safe electricity consumption level resident and living standard；Meanwhile reducing the wave of enterprise's raw material
Take, saved a large amount of energy and human cost, greatly improve the economic benefit of enterprise, will also promote the development of environmental protection cause,
Economy for electricity consumption, safety and reliability are promoted, the generation of the fire incident caused by low-voltage power supply failure is reduced, will produce
Raw huge social benefit.
Description of the drawings
Fig. 1 is the system structure diagram of the utility model.
Fig. 2 is the group-network construction schematic diagram of the utility model.
Fig. 3 is the topological structure schematic diagram that the utility model uses.
Specific implementation mode
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
LORA wireless communication techniques as shown in Figure 1, Figure 2 and Figure 3 are in the application process of low-voltage distribution transformer platform district, communication system
Including terminal device, LoRa gateways, distribution transformer terminals and main equipment, LoRa modules are respectively connected in multiple terminal devices, it is described
LoRa modules are connect by built-in chip type or RS485 interfaces with terminal device, and multiple terminal devices pass through LoRa wireless networks
Carry out data transmission with LoRa gateways, is carried out data transmission by RS485 networks between the LoRa gateways and distribution transformer terminals, institute
It states and is carried out data transmission by GPRS signals between distribution transformer terminals and main equipment, communication steps are as follows：
Networking certification, terminal must carry out an adition process before participating in data exchange with LoRa gateways, and terminal is set
Standby that primary new adition process must be carried out when losing session information every time, adition process needs terminal to carry out individual character setting,
Setting information includes DevEUI, AppEUI, AppKey, and DevEUI is the device addresses IEEE-EUI64, and AppEUI is IEEE-
EUI64 application address, AppKey are AES-128 application secret keys；
When network is added by over the air, OTA in equipment, AppKey is used for deriving AppSkey and NwkSKey to encrypt and test
Card transmission, terminal do not need the setting of any NwkSKey, just can be in the internetwork roaming of the network of different suppliers；
Terminal device is added network and needs two MAC information exchanging process：Join-Request and Jion-Accept；
Join-Request message is initiated from terminal, and the random number DevNonce of AppEUI, DevEUI and two bytes are included；LoRa
The specific random numbers sended over before gateway tracing equipment terminal, ignore that this terminal sends later with other with
Any addition of machine number is asked；
LoRa gateways can make replys, i.e. Jion-Accept message to application is added, Jion-Accept message and commonly
Downstream message it is the same, it is unique unlike replaced with JOIN_ACCEPT_DELAY1 and JOIN_ACCEPT_DELAY2
RECEIVE_DELAY1 and RECEIVE_DELAY2 is not allowed to if request is added, does not have Jion-Accept message；
Under electronic codebook mode pattern, LoRa gateways encrypt Jion-Accept message with AES decryption oprerations, and terminal is set
It is standby that message is just decrypted using AES encryption operation.
The terminal device includes temperature controller, intelligent capacitor controller, protector, electric energy meter or access controller.
LoRa is a kind of spread spectrum, is not Direct Sequence Spread Spectrum.Direct Sequence Spread Spectrum is passed by modulating carrier chip
Defeated more frequency spectrums, to improve coding gain.And LoRa modulation is similar with multimode FSK modulation, is come using unmodulated carrier
Linear frequency modulation is carried out, so that energy is distributed to wider frequency range, realizes telecommunication.
From the point of view of network structure, the LoRa network architectures are a typical star topologies, in this network architecture,
LoRa gateways are the relayings of a transparent transmission, connect terminal device and rear end central server.Pass through between gateway and server
Standard IP connections, terminal device is using single-hop and one or more gateway communications.It is two-way between all nodes and gateway
Letter, while also supporting the operations such as high in the clouds upgrading to reduce high in the clouds communication time.The Star Network structure that LoRa is used simplifies logical
The complexity of letter, the functions such as uplink and downlink channel selection, channel monitoring, retransmission mechanism that LoRa protocol layers are realized in addition carry significantly
The high stability of LoRa communications and pressure-resistant performance.
IP Security is ensured using only network key (EU164) in terms of safety, using uniquely using key
(EU164) and ensure application layer end-by-end security, equipment access safety is ensured using the special key of equipment (EUI128).It is all
The content of equipment is encrypted using encryption polymerization methods, ensure that the safety of data transmission.User uses in order to prevent simultaneously
Electric data are analyzed, and user power utilization data need to have secret protection ability.
For networking certification, terminal must carry out an adition process before participating in data exchange with LoRa gateways.Eventually
End equipment must carry out primary new adition process when losing session information every time.Adition process needs terminal progress individual character to set
It sets, setting information includes DevEUI, AppEUI, AppKey.DevEUI is the device addresses IEEE-EUI64.AppEUI is IEEE-
EUI64 application address.AppKey is AES-128 application secret keys.
When network is added by over the air, OTA in equipment, AppKey is used for deriving AppSkey and NwkSKey to encrypt and test
Card transmission.Therefore, terminal does not need the setting of any NwkSKey, so terminal becomes in the internetwork roaming of the network of different suppliers
It must be easy.
Terminal device is added network and needs two MAC information exchanging process：Join-Request and Jion-Accept.
Join-Request message is initiated from terminal, and the random number DevNonce of AppEUI, DevEUI and two bytes are included.LoRa
The specific random numbers sended over before gateway tracing equipment terminal, ignore that this terminal sends later with other with
Any addition of machine number is asked.This mechanism can prevent Replay Attack (Replay Attracts).Such as：Before transmission
The addition information of record, it is intended that disconnect each node from network.
Join-Request message is not encrypted, and message integrity code MIC value computational methods are as follows：
Cmac=aes128_cmac (AppKey, MHDR | AppEUI | DevEUI | DevNonce)
MIC=cmac [0..3]
LoRa gateways can make reply, i.e. Jion-Accept message to application is added.Jion-Accept message and common
Downstream message it is the same, it is unique unlike replaced with JOIN_ACCEPT_DELAY1 and JOIN_ACCEPT_DELAY2
RECEIVE_DELAY1 and RECEIVE_DELAY2.If request is added not to be allowed to, Jion-Accept message is not had.
AppNonce is that the random number that LoRa gateways provide or some ID, terminal device derive network session with it
It is as follows to generate algorithm for secret key (NwkSKey) and utility cession secret key (AppSKey)：
NwkSKey=aes128_encrypt (AppKey, 0x01 | AppNonce | NetID | DevNonce | pad16)
AppSKey=aes128_encrypt (AppKey, 0x02 | AppNonce | NetID | DevNonce | pad16)
The computational methods of MIC are as follows：
Cmac=aes128_cmac (AppKey, MHDR | AppNonce | NetID | DevAddr | RFU | RxDelay |
CFList)
MIC=cmac [0..3]
The message of Jion-Accept is encrypted with AppKey, and Encryption Algorithm is as follows：
aes128_decrypt(AppKey,AppNonce|NetID|DevAddr|RFU|RxDelay|CFList|MIC)
Under ECB (electronic codebook mode) pattern, LoRa gateways encrypt Jion-Accept message, institute with AES decryption oprerations
Message can be decrypted with terminal device with AES encryption operation.By this method, terminal device only needs to execute cryptographic operation
Without executing decryption oprerations.
Realize LoRa over long distances, the cordless communication network of low-power consumption.Only network key is used in terms of safety
(EU164) ensure IP Security, using uniquely using key (EU164) and ensureing application layer end-by-end security, using setting
Standby special key (EUI128) ensures equipment access safety.The content of all devices is encrypted using ES128 modes, ensure that
The safety of data transmission.System architecture design based on Internet of Things, needs the system and national grid that meet Internet of Things simultaneously
Specification.
It is to carry out data to add to protect the integrality of the privacy and data of user in intelligent grid, most straightforward approach
It is close, however, this will cause to carry out a large amount of decryption calculating in control centre.Polymerization technique can substantially reduce in power grid communication,
It calculates and storage overhead, the aggregation scheme in conjunction with secret protection is solve the problems, such as mass data secure communication in intelligent grid one
A method, currently existing scheme are based primarily upon safety signal processing mostly, are based on homomorphism and multi-party computations, less efficient.This
Scheme is quasi- using the encryption aggregation scheme with secret protection so that mass data reaches control centre safe efficiently, simultaneously
Protect user data privacy.
Concrete scheme is described as follows：
Key generates：System generates series of parameters (p, q), obtains n=pq and λ=lcm (p-1, q-1), defines one
A power functionμ=(L (gλmodn2))-1modn.Wherein, public key is pk=(n, g), and private key is
Sk=(λ, μ).
Data encryption：The intelligent terminals such as intelligence instrument are to electricity consumption data m ∈ ZnIt is encrypted.A number is generated at randomThen ciphertext c=E (m)=g is generatedm·rnmodn2。
Data aggregate：Gateway passes to control centre after being polymerize the encryption electricity consumption data of reception.
Data after being polymerize are
Data deciphering:Ciphertext of the control centre to acquisitionIt is decrypted, obtains plaintext m=D (c)=L (cλ
modn2)·μmodn.Control centre can obtain the summation of residential quarter electricity consumption data in this way, without knowing each family user's
Electricity consumption data.This programme is capable of confidentiality, the integrality of effective protection user power utilization data, while improving the efficiency of encryption and decryption.
It should be pointed out that above example is only the representative example of the utility model.The utility model can also there are many
Deformation.Every essence according to the utility model is to any simple modification, equivalent change and modification made by above example,
It is considered as belonging to the scope of protection of the utility model.
Claims (2)
1. a kind of aftercurrent action protecting equipment based on LORA wireless communication techniques, it is characterised in that：Including terminal device,
LoRa gateways, distribution transformer terminals and main equipment are respectively connected with LoRa modules in multiple terminal devices, and the LoRa modules pass through chip
Built-in or RS485 interfaces are connect with terminal device, and multiple terminal devices are by LoRa wireless networks and LoRa gateways into line number
According to transmission, carried out data transmission by RS485 networks between the LoRa gateways and distribution transformer terminals, the distribution transformer terminals and master set
Carried out data transmission by GPRS signals between standby.
2. a kind of aftercurrent action protecting equipment based on LORA wireless communication techniques according to claim 1, special
Sign is：The terminal device includes temperature controller, intelligent capacitor controller, protector, electric energy meter or access controller.
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| CN201721905829.1U CN207652034U (en) | 2017-12-29 | 2017-12-29 | A kind of aftercurrent action protecting equipment based on LORA wireless communication techniques |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305458A (en) * | 2020-12-30 | 2021-02-02 | 南京斯泰恩智慧能源技术有限公司 | Wave recording type platform area residual current detection terminal and early warning system |
| CN115633376A (en) * | 2022-11-22 | 2023-01-20 | 天津七一二通信广播股份有限公司 | Radio station communication method and system based on LoRa |
-
2017
- 2017-12-29 CN CN201721905829.1U patent/CN207652034U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305458A (en) * | 2020-12-30 | 2021-02-02 | 南京斯泰恩智慧能源技术有限公司 | Wave recording type platform area residual current detection terminal and early warning system |
| CN112305458B (en) * | 2020-12-30 | 2021-04-16 | 南京斯泰恩智慧能源技术有限公司 | Wave recording type platform area residual current detection terminal and early warning system |
| CN115633376A (en) * | 2022-11-22 | 2023-01-20 | 天津七一二通信广播股份有限公司 | Radio station communication method and system based on LoRa |
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Effective date of registration: 20210528 Address after: 311300 No.158, Baojin Road, Jinbei street, Lin'an City, Hangzhou City, Zhejiang Province Patentee after: Yu Zhiwei Address before: 311300 No. 2 Longshan Road, Jinbei Street, Linan City, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG YIAN ELECTRIC POWER ELECTRONIC TECHNOLOGY Co.,Ltd. |
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