CN113949606A - Power distribution network current differential protection communication system and method - Google Patents
Power distribution network current differential protection communication system and method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2869—Operational details of access network equipments
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/12—Reselecting a serving backbone network switching or routing node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W88/16—Gateway arrangements
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Abstract
The invention discloses a power distribution network current differential protection communication system and a method, wherein the communication system detects the on-off conditions of all links in advance through a detection module, switches after the detection result is met, and switches when a channel is intact, so that the communication stability and timeliness of power distribution network current differential protection are ensured; the communication system is structurally provided with a change-over switch, and the switching between the wired channel link and the wireless channel link is only dependent on routing selection and also depends on the detection result of the detection module; the switching operation is not only the convergence of the routing table, but also the physical switching can be carried out through the switch so as to ensure the switching efficiency.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a power distribution network current differential protection communication system and method.
Background
At present, current differential protection of a power distribution network mainly adopts an EPON (Ethernet passive optical network) special optical fiber channel, and the EPON special optical fiber channel adopts hand-in-hand protection, so that high-bandwidth service bearing can be realized, but the following defects also exist:
1. laying optical cables along a distribution line in a large scale, and cutting off and terminating the optical cables at service nodes, the process requirement is high, the construction cost is high, and the locations of distribution and utilization terminals in some places do not have optical fiber laying conditions;
2. because the ONU equipment in the EPON system has higher requirement on optical power, the number of the ONU equipment connected under a single PON port is limited, and the equipment networking cost is high;
3. in the communication mode of the EPON system, terminal data are transmitted to a distribution network master station for interaction, direct data interaction between terminals cannot be realized, and the terminal data interaction time delay is relatively high;
4. EPON adopts "hand in hand" mode networking, and the networking mode is more complicated, occupies more to the optical cable resource, and most terminals fail to realize "hand in hand" protection, and city construction operation can destroy distribution network communication optical cable often, leads to distribution network communication stability to receive very big challenge.
As shown in fig. 2, the switching of the communication link is directly controlled by the switching chip and the routing device, but when the 5G communication and the optical fiber communication are switched, the switching chip and the routing device mainly depend on the up state and the down state of the port, and have no on-off mechanism in the middle, and completely depend on the processing of the switching chip added by the CPU.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the traditional optical fiber channel communication mode special for the EPON has high construction cost and environment, and a communication system with a wireless and wired parallel mode has a complex switching process, cannot timely master the condition of the whole communication link, and influences the communication stability and timeliness of the current differential protection of a power distribution network; the present invention provides a power distribution network current differential protection communication system and method, so as to solve the above problems.
The invention is realized by the following technical scheme:
this scheme provides a distribution network current differential protection communication system, includes: switching a gateway, a wired channel link and a wireless channel link;
the handover gateway includes: the system comprises a detection module, a selector switch, an exchange module and a CPU;
the CPU controls the detection module to detect the link protocol state of the wired channel link or the wireless channel link;
the switching module controls the switch to switch from the wired channel link to the wireless channel link or from the wireless channel link to the wired channel link based on the link protocol state detection result.
The working principle of the scheme is as follows: although a traditional 5G communication system may be attached with an optical fiber communication channel, when the 5G communication is switched with the optical fiber communication, the traditional 5G communication system mainly depends on the up state and the down state of a port, has no on-off mechanism in the middle, completely depends on the processing of an exchange chip added by a CPU, and is crucial to the transmission and the punctual arrival of information in a power distribution network current differential protection system; the communication system provided by the scheme detects the on-off conditions of all links in advance through the detection module, switches after the detection result is met, and switches when the channel is intact, so that the communication stability and timeliness of the current differential protection of the power distribution network are ensured. The communication system is structurally provided with a change-over switch, and the switching between the wired channel link and the wireless channel link is only dependent on routing selection and also depends on the detection result of the detection module; the switching operation is not only the convergence of the routing table, but also the physical switching can be carried out through the switch so as to ensure the switching efficiency.
A further optimization scheme is that the switching gateway further comprises: a wired channel physical interface and a wireless channel physical interface;
the change-over switch is used for switching on or switching off a wired channel link through a wired channel physical interface; the switch switches on or off the wireless channel link through the wireless channel physical interface.
The independent change-over switch is used for physical switching when the switching condition is met, so that the problem that the switching time cannot meet the practical application due to overlong routing convergence time can be solved.
The detection module is a BFD protocol detection module, and when the protocol state of a wired channel link or a wireless channel link is wrong, the exchange module controls the selector switch to switch from the wired channel link to the wireless channel link or from the wireless channel link to the wired channel link.
The further optimization scheme is that the protocol state judgment method of the wired channel link or the wireless channel link comprises the following steps:
each station in the power distribution network is regarded as a node, and the station comprises a power distribution master station and each power distribution substation connected with the power distribution master station;
the BFD protocol detection module takes any one node as an initial node and detects whether communication protocols from the initial node to other nodes are communicated or not;
the starting node traverses all the nodes, and when the communication protocols of any two nodes are not communicated, the protocol state of the wired channel link or the wireless channel link is judged to be wrong.
The BFD protocol detection module can detect the on-off states of all devices supporting the BFD protocol, namely the on-off states of all channels can be detected as long as monitoring is available, the on-off state of a target road can be known just like navigation, and the on-off state of all roads can also be detected.
In fact, in a communication system of power distribution network current differential protection, an optical fiber channel is used as a main channel, a wireless channel is used as a backup channel, and the BFD protocol detection module in the scheme can be suitable for both the optical fiber link and the wireless link. The change-over switch triggers operation as long as switching conditions are met, a traditional route switching mode needs data link establishment, switching consumption usually needs a second level, switching consumption can reach a millisecond level frequently, time delay of data link establishment can be greatly shortened, and switching timeliness is guaranteed.
The further optimization scheme is that the wireless channel link comprises a 4G/5G module, a multiplexing module and a ZigBee module;
the 4G module and the multiplexing module are connected with the CPU through a MiniPCie connector, and the 5G module is connected with the CPU through an m.2 connector;
the multiplexing module includes: a multiplexer and a plurality of SIM cards.
The SIM card is in a double-card single-band mode, the slot position of the SIM is switched by using the signal control multiplexer, the SIM card is not supported for hot plug, the card slot adopts a flip cover, the anti-vibration performance is good, and the SIM can be effectively prevented from falling off.
The further optimization scheme is that the switching gateway further comprises a storage module and an Ethernet port; the Ethernet port supports a LAN port and a WAN port. The requirements for ethernet ports in the communication system rules are 4 gigabit WAN ports and 6 gigabit LAN ports, where the WAN ports are electrical ports, the LAN ports support 2 optical ports and 4 electrical ports, the LAN ports support the line speed forwarding function, and these ethernet ports cannot be directly output from the CPU and are implemented by means of an external switch chip.
The further optimization scheme is that the CPU comprises: QSGMII interface and 2-path RGMII parallel interface;
the switching module includes: the device comprises a switching core, a first PHY chip and a second PHY chip;
the switching chip is matched with the first PHY chip and is connected with the CPU through 2 paths of RGMII parallel interfaces to support the LAN port, wherein the 1 path of RGMII parallel interface is connected with the CPU and the switching chip, and the other path of RGMII parallel interface is connected with the first PHY chip and the switching chip;
the second PHY chip is connected with the CPU through a QSGMII interface to support a WAN port.
The RGMII0 interface of the CPU is used for connecting the switching chip to realize data transmission between the switching chip and the CPU, and data forwarding can be realized between the WAN port and the LAN port.
The further optimization scheme is that the type of the switching chip is 88E6176, the type of the first PHY chip is 88E1512, and the type of the second PHY chip is 88E 1548.
The switching gateway is configured in a ring main unit and an open-close station, and the router equipment of the wired channel link and the wireless channel link is configured in a transformer substation.
The scheme also provides a power distribution network current differential protection communication method, which is applied to the power distribution network current differential protection communication system and comprises the following steps:
detecting the link protocol state of the wired channel link or the wireless channel link;
when the wired channel link or the wireless channel link has a protocol state that is wrong, the switch switches from the wired channel link to the wireless channel link or from the wireless channel link to the wired channel link.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention provides a power distribution network current differential protection communication system and a power distribution network current differential protection communication method, wherein the communication system detects the on-off conditions of all links in advance through a detection module, switches after the detection result is met, and switches when a channel is intact, so that the communication stability and timeliness of power distribution network current differential protection are ensured; the communication system is structurally provided with a change-over switch, and the switching between the wired channel link and the wireless channel link is only dependent on routing selection and also depends on the detection result of the detection module; the switching operation is not only the convergence of the routing table, but also the physical switching can be carried out through the switch so as to ensure the switching efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:
FIG. 1 is a schematic structural diagram of a current differential protection communication system of a power distribution network;
FIG. 2 is a diagram illustrating a conventional communication system;
fig. 3 is a schematic structural diagram of a current differential protection communication system of a power distribution network according to embodiment 3;
FIG. 4 is a diagram of MAC allocation in example 3;
FIG. 5 is a schematic diagram of the WAN port and LAN port design of embodiment 3;
fig. 6 is a schematic diagram of a wireless channel link principle according to embodiment 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
The current differential protection of the power distribution network adopts a traditional special optical fiber channel for the EPON, and in remote regions of the terrain, the optical fiber is difficult to lay, so that the data transmission stability cannot be ensured; as shown in fig. 2, the switching of the communication link is directly controlled by the switching chip and the routing device, but when the 5G communication and the optical fiber communication are switched, the switching chip and the routing device mainly depend on the up state and the down state of the port, and have no on-off mechanism in the middle, and completely depend on the processing of the switching chip added by the CPU, and in the switching process, the routing device needs to reestablish the link, which often causes high switching consumption; in view of this, the following embodiments are provided to solve the above technical problems according to the technical solutions of the present invention.
Example 1
The present embodiment provides a power distribution network current differential protection communication system, as shown in fig. 1, including: switching a gateway, a wired channel link and a wireless channel link;
the handover gateway includes: the system comprises a detection module, a selector switch, an exchange module and a CPU;
the CPU controls the detection module to detect the link protocol state of the wired channel link or the wireless channel link;
the switching module controls the switch to switch from the wired channel link to the wireless channel link or from the wireless channel link to the wired channel link based on the link protocol state detection result.
The handover gateway further comprises: a wired channel physical interface and a wireless channel physical interface;
the change-over switch is used for switching on or switching off a wired channel link through a wired channel physical interface; the switch switches on or off the wireless channel link through the wireless channel physical interface.
The detection module is a BFD protocol detection module, and when the protocol state of a wired channel link or a wireless channel link is judged to be wrong, the exchange module controls the selector switch to switch from the wired channel link to the wireless channel link or from the wireless channel link to the wired channel link.
The protocol state judging method of the wired channel link or the wireless channel link comprises the following steps:
each station in the power distribution network is regarded as a node, and the station comprises a power distribution master station and each power distribution substation connected with the power distribution master station;
the BFD protocol detection module takes any one node as an initial node and detects whether communication protocols from the initial node to other nodes are communicated or not;
the starting node traverses all the nodes, and when the communication protocols of any two nodes are not communicated, the protocol state of the wired channel link or the wireless channel link is judged to be wrong.
The wireless channel link comprises a 4G/5G module, a multiplexing module and a ZigBee module;
the 4G module and the multiplexing module are connected with the CPU through a MiniPCie connector, and the 5G module is connected with the CPU through an m.2 connector;
the multiplexing module includes: a multiplexer and a plurality of SIM cards.
The switching gateway also comprises a storage module and an Ethernet port; the Ethernet port supports a LAN port and a WAN port.
The CPU includes: QSGMII interface and 2-path RGMII parallel interface;
the switching module includes: the device comprises a switching core, a first PHY chip and a second PHY chip;
the switching chip is matched with the first PHY chip and is connected with the CPU through 2 paths of RGMII parallel interfaces to support the LAN port, wherein the 1 path of RGMII parallel interface is connected with the CPU and the switching chip, and the other path of RGMII parallel interface is connected with the first PHY chip and the switching chip;
the second PHY chip is connected with the CPU through a QSGMII interface to support a WAN port.
The type of the switching chip is 88E6176, the type of the first PHY chip is 88E1512, and the type of the second PHY chip is 88E 1548.
The switching gateway is arranged in the ring main unit and the switching station, and the router equipment of the wired channel link and the wireless channel link is arranged in the transformer substation.
Example 2
The present embodiment provides a power distribution network current differential protection communication method, which is applied to the power distribution network current differential protection communication system in the previous embodiment, and includes:
detecting the link protocol state of the wired channel link or the wireless channel link;
when the wired channel link or the wireless channel link has a protocol state that is wrong, the switch switches from the wired channel link to the wireless channel link or from the wireless channel link to the wired channel link.
Example 3
In this embodiment, an intelligent gateway 5G/optical fiber dual uplink communication system is designed based on the above embodiments, and on a distribution network line with optical cable resources, an optical cable (wired channel link) is used as a primary communication medium, and 5G communication (wireless channel link) is used as a backup link, and when the optical cable is interrupted, the communication link can be quickly switched to 5G, so as to implement wired/wireless link backup; on a power distribution network line without optical cable resources, 5G mode communication can be directly adopted.
Hardware technology route:
the switching gateway complete machine is designed according to industrial grade requirements, meets the working temperature range of-40 ℃ to +85 ℃, meets the dustproof and waterproof requirements of IP40, and can reach the dust three-level explosion-proof requirements and the national standard of industrial 4-level EMC electromagnetic protection. The intelligent switching gateway equipment series complete machine adopts a master control card adding mode, realizes the butt joint work of various industrial field interfaces by configuring different task modules, and meets the requirements of various industrial buses on equipment interfaces.
The switching gateway complete machine is divided into a CPU unit, a 5G network access unit, an artificial intelligence acceleration unit, a storage unit, a safety encryption unit, a power supply unit, a network communication unit, a short-distance internet of things technical unit, an industrial bus acquisition unit and a protective shell unit, the free combination function is realized, the cost can be effectively reduced, and deep customized adaptation of different scenes can be realized.
And developing firmware software of the intelligent gateway. A gateway software architecture for decoupling software and hardware based on the independent intellectual property rights of the Rui-kang is developed, and a multi-service fusion operation environment including an IT/OT/CT function can be realized by adopting micro-service and containerization technologies through different hardware system architectures. The innovative multi-core automatic scheduling technology can give consideration to the advantages of a real-time operating system and a non-real-time operating system, and dynamically loads industrial field bus data acquisition application, data forwarding and message distribution application, flow identification and shaping application, deep learning inference application, safety protection and encryption application and the like according to different application scenes. And finally, conversion between up to 30 industrial field buses or industrial Ethernet protocols and 5G protocols can be realized. The flow identification technology based on big data and deep learning can identify various industrial field buses and provide consistent network SLA quality assurance for the industrial field buses according to the requirements of a network scheduling platform. By combining the real-time kernel, DPDK fast forwarding and TSN technologies, the processing and forwarding delay of the 5G network equipment is reduced to be within 4ms, and the wired and wireless full-link low-delay transmission capability under the industrial Internet +5G full-network environment is realized by matching with 3GPP R16. The whole system realizes a multi-level system safety and protection system through a safety identity recognition chip and a national cryptographic algorithm, performs safety protection on transmitted and stored data, and can effectively resist the problems of hacker attack and information leakage.
And developing an intelligent gateway cloud management system. In order to solve the problems of multi-device management and service scheduling of an industrial 5G gateway in the implementation process of the fragmentation application, a cloud management platform supporting IT/CT/OT fusion is developed. By means of the accumulation of the Rascondard on a software defined industrial network and an industrial internet platform, the integrated management based on end-to-end service logic is realized through a cloud docking platform fusion technology: firstly, an equipment management interface supports hierarchical management of a 5G access gateway, an industrial field terminal and a 5G bearer layer management protocol; a service management interface supports remote programming and debugging of a gateway industrial protocol library, and realizes graphical configuration programming development and debugging; application management interface-supporting gateway container management and edge computing resource management functions; and fourthly, a network management interface is used for realizing network resource scheduling coordination and scheduling service defined by SDN software of the industrial intranet.
As shown in fig. 3, the switching gateway hardware system uses a CPU as a control center, and is composed of a storage module, a wireless module, an ethernet interface, a bus interface, a peripheral circuit, and the like. The storage module comprises a memory DDR and an internal storage. The wireless module comprises 4/5G, WIFI and ZigBee, the 4/5G module supports double-card single-band, and the WIFI supports 2.4G/5G double-frequency. The Ethernet port supports 6-way 1G LAN port and 4-way 1G WAN. The bus interface supports RS232/485 bus, debugging interface and the like. The peripheral circuit comprises an input power supply and protection, a small power supply module on the board, a clock circuit, a reset and watchdog circuit, an indicator light circuit and the like.
As shown in fig. 4, the CPU has 2 RGMII parallel interfaces and 4 Serdes interfaces, which can be extended to ethernet ports according to requirements. But there is a limit to the scalable number because the CPU has a total of 7 MACs, as shown in the following figure for MAC allocation.
The requirements for ethernet ports in the specification are 4 gigabit WAN ports and 6 gigabit LAN ports, wherein the WAN ports are in the form of electrical ports, the LAN ports support 2 optical ports and 4 electrical ports, and the LAN ports support the line speed forwarding function.
These ethernet ports cannot all be output from the CPU and are implemented by means of an external switch chip. 88E6176 in the device library is 1 port switching chip with 7 ends, which is matched with a single-port gigabit PHY 88E1512, and can realize LAN design. 88E1548 is a 4-port PHY chip, which can be configured in Combo mode, and can implement WAN design, and its functional block diagram is shown in FIG. 5.
The RGMII0 interface of the CPU is used for connecting the switching chip to realize data transmission between the switching chip and the CPU, and data forwarding can be realized between the WAN port and the LAN port. The 4-path Serdes interface of the CPU can be configured into a plurality of modes, considering that the wireless module reserves a 2-path PCIe interface, and referring to the configuration mode of the following figure, RCW [128:143] can be configured into 3455, Serdes0 can be configured into a QSGMII interface connected with a PHY chip, and the rest Serdes interfaces are used as PCIe or SGMII interfaces. The Serdes of the CPU maximally supports 10G forwarding for large packet messages, needs software configuration and occupies larger CPU efficiency, and when the WAN port is used as a routing function in the design, the soft forwarding performance of the WAN port temporarily does not need a particularly high rate.
The 5G technology is a new generation mobile communication system and is a revolutionary technical innovation. In order to meet the increase of the explosive demand of mobile data, the mobile data is the mainstream technology of future mobile communication, the automatic driving and the telemedicine which are developed therewith are better applied, and meanwhile, the internet of things is the main application field of 5G.
In the scheme, the interfaces of the golden finger connectors of the 5G module are MiniPCie and m.2 respectively, and the uplink bus interface of the module comprises USB2.0/USB3.0/Pcie2.0 and the like, which are specifically shown in the following table.
| Golden finger interface | m.2 | m.2 |
| Bus line | USB3.0/Pcie2.0 | USB3.0/Pcie2.0 |
The 1-way Serdes (Serdes2) using the CPU is configured into a PCIe2.0 interface, and the 1-way USB interface is configured into a USB3.0 for connecting the m.2 connector of the 5G module. The USB3.0 interface is also compatible with the USB2.0 interface and is connected to the MiniPCie connector of the 4G module. Only one communication module is reserved in the system, and the corresponding module is selected and matched according to the actual application scene. This requires a relationship in the form of the connector while retaining only one type of connector and selectively soldering one type of connector. The connector is placed as close as possible without interference, and the bus wiring is daisy-chained as possible to reduce the branching of the high-speed bus. The 4G module needs 2 antennas, the Hua 5G module needs 4 antennas, the Longshang 5G module needs 6 antennas at most, and the 4 antennas can also meet the coverage relation of all frequency bands under the condition of not needing full speed. Therefore, 4 SMA interfaces are structurally reserved, and the layout positions are arranged on the side face of the case and are on the same plane with the power supply input terminal. The application circuit of the module is shown in fig. 6. The SIM card is in a double-card single-band mode, the slot position of the SIM is switched by using the signal control multiplexer, and the hot plug of the SIM card is not supported. The card slot adopts a flip cover, so that the anti-vibration performance is good, and the SIM can be effectively prevented from falling off. The supported SIM card model is a Micro SIM model, and the small card occupies small space and is flexible and common in installation. The window for installing the SIM is designed on the side face of the structure, the cover plate is sealed with the structure, and a professional tool is needed to disassemble the cover plate. The detailed circuits such as the protection of the SIM card interface recommended by the module are shown in the following figures, the TVS protection is added to the signal line, and the parasitic capacitance of the device is less than 10 pF.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A power distribution network current differential protection communication system, comprising: switching a gateway, a wired channel link and a wireless channel link;
the handover gateway includes: the system comprises a detection module, a selector switch, an exchange module and a CPU;
the CPU controls the detection module to detect the link protocol state of the wired channel link or the wireless channel link;
the switching module controls the switch to switch from the wired channel link to the wireless channel link or from the wireless channel link to the wired channel link based on the link protocol state detection result.
2. The power distribution network current differential protection communication system of claim 1, wherein the switching gateway further comprises: a wired channel physical interface and a wireless channel physical interface;
the change-over switch is used for switching on or switching off a wired channel link through a wired channel physical interface; the switch switches on or off the wireless channel link through the wireless channel physical interface.
3. The system according to claim 1, wherein the detection module is a BFD protocol detection module, and the switching module controls the switch to switch from the wired channel link to the wireless channel link or from the wireless channel link to the wired channel link when the protocol status of the wired channel link or the wireless channel link determines that the protocol status is incorrect.
4. The power distribution network current differential protection communication system according to claim 3, wherein the protocol state determination method of the wired channel link or the wireless channel link is as follows:
each station in the power distribution network is regarded as a node, and the station comprises a power distribution master station and each power distribution substation connected with the power distribution master station;
the BFD protocol detection module takes any one node as an initial node and detects whether communication protocols from the initial node to other nodes are communicated or not;
the starting node traverses all the nodes, and when the communication protocols of any two nodes are not communicated, the protocol state of the wired channel link or the wireless channel link is judged to be wrong.
5. The power distribution network current differential protection communication system of claim 1, wherein the wireless channel link comprises a 4G/5G module, a multiplexing module and a ZigBee module;
the 4G module and the multiplexing module are connected with the CPU through a MiniPCie connector, and the 5G module is connected with the CPU through an m.2 connector;
the multiplexing module includes: a multiplexer and a plurality of SIM cards.
6. The power distribution network current differential protection communication system of claim 1, wherein the switching gateway further comprises a memory module and an ethernet port; the Ethernet port supports a LAN port and a WAN port.
7. The power distribution network current differential protection communication system according to claim 6, wherein the CPU comprises: QSGMII interface and 2-path RGMII parallel interface;
the switching module includes: the device comprises a switching core, a first PHY chip and a second PHY chip;
the switching chip is matched with the first PHY chip and is connected with the CPU through 2 paths of RGMII parallel interfaces to support the LAN port, wherein the 1 path of RGMII parallel interface is connected with the CPU and the switching chip, and the other path of RGMII parallel interface is connected with the first PHY chip and the switching chip;
the second PHY chip is connected with the CPU through a QSGMII interface to support a WAN port.
8. The distribution network current differential protection communication system of claim 1, wherein the switch chip is 88E6176, the first PHY chip is 88E1512, and the second PHY chip is 88E 1548.
9. The power distribution network current differential protection communication system according to claim 1, wherein the switching gateway is disposed in a ring main unit, a switching station, and router devices of a wired channel link and a wireless channel link are disposed in a substation.
10. A power distribution network current differential protection communication method, which is applied to the power distribution network current differential protection communication system according to any one of claims 1 to 8, and comprises the following steps:
detecting the link protocol state of the wired channel link or the wireless channel link;
when the wired channel link or the wireless channel link has a protocol state that is wrong, the switch switches from the wired channel link to the wireless channel link or from the wireless channel link to the wired channel link.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008095127A2 (en) * | 2007-01-31 | 2008-08-07 | Advanced Technologues Holdings, Inc. | A hybrid wired and wireless universal access network |
| CN107453849A (en) * | 2017-07-31 | 2017-12-08 | 中国南方电网有限责任公司电网技术研究中心 | Power distribution communication network wire link and the mutually standby interlock method of Radio Link and system, vacant lot are mutually for integrated apparatus |
| CN213937960U (en) * | 2020-12-16 | 2021-08-10 | 五邑大学 | Multi-frequency-band communication gateway and power monitoring system thereof |
| CN113517940A (en) * | 2021-04-25 | 2021-10-19 | 海南电网有限责任公司 | Intelligent switching system for electric power optical fiber private network and 5G public network |
-
2021
- 2021-11-25 CN CN202111411402.7A patent/CN113949606A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008095127A2 (en) * | 2007-01-31 | 2008-08-07 | Advanced Technologues Holdings, Inc. | A hybrid wired and wireless universal access network |
| CN107453849A (en) * | 2017-07-31 | 2017-12-08 | 中国南方电网有限责任公司电网技术研究中心 | Power distribution communication network wire link and the mutually standby interlock method of Radio Link and system, vacant lot are mutually for integrated apparatus |
| CN213937960U (en) * | 2020-12-16 | 2021-08-10 | 五邑大学 | Multi-frequency-band communication gateway and power monitoring system thereof |
| CN113517940A (en) * | 2021-04-25 | 2021-10-19 | 海南电网有限责任公司 | Intelligent switching system for electric power optical fiber private network and 5G public network |
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