A distributed photovoltaic communication network multi-protocol application layer networking method, system, device and storage medium

Abstract

The application discloses a kind of distributed photovoltaic communication network multi-protocol application layer networking method, system, equipment and storage medium, the method comprises the following steps: distributed photovoltaic networking is respectively arranged in upper layer application communication network and lower layer communication network;Upper layer application communication network and lower layer communication network establish logical mapping relationship according to communication demand, and upper layer distributed photovoltaic networking service traffic is mapped to lower layer communication network;Upper layer application communication network and lower layer communication network are independent of each other;Upper layer application communication network and lower layer communication network utilize SDN software-defined network technology to communicate;The present application realizes upper and lower layer cross-layer data transmission.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of distributed photovoltaic systems, and particularly relates to a multi-protocol application layer networking method for a distributed photovoltaic communication network. BACKGROUND

[0002] In the face of high dynamics of multi-granularity slicing heterogeneous resources in a local resource-intensive area of distributed photovoltaics, the traditional network slicing resource adjustment mechanism for allocating fixed resources to network nodes and links cannot timely respond to traffic explosion and other sudden situations. The network state and business needs at future moments are unknown to upper decision makers, resulting in a lag in the response process of current network slicing resource allocation decisions to user behavior. Therefore, it is necessary to reconsider the adjustment strategy of the slice to effectively respond to traffic mutations and achieve precise and effective adjustment of slice resource allocation.

[0003] Distributed terminals have the characteristics of business diversification, communication diversification, and local high density. When carrying diversified businesses, the communication needs of different collection-type businesses and control-type businesses differ greatly, and differentiated communication services need to be provided. However, the traditional data communication method based on physical networks is disconnected from upper-layer application businesses and cannot achieve high-bandwidth, low-latency, flexible networking support for upper-layer businesses to achieve efficient scheduling of high-penetration distributed photovoltaic resources in high-density load areas and further optimize business latency to meet diversified business needs under high-load conditions. SUMMARY

[0004] The present application aims to provide a multi-protocol application layer networking method for a distributed photovoltaic communication network. By mapping upper-layer distributed photovoltaic networking business traffic to the lower-layer communication network, the upper-layer application network is independent of the lower-layer communication network in topology and uses SDN technology for communication traffic control. The two layers cooperate to achieve distributed photovoltaic logical networking and flexible communication.

[0005] The technical solution of the present application is a multi-protocol application layer networking method for a distributed photovoltaic communication network, which includes the following steps: setting distributed photovoltaic networking in the upper-layer application communication network and the lower-layer communication network; establishing a logical mapping relationship between the upper-layer application communication network and the lower-layer communication network according to communication needs, and mapping upper-layer distributed photovoltaic networking business traffic to the lower-layer communication network; the upper-layer application communication network and the lower-layer communication network are independent of each other; and the upper-layer application communication network and the lower-layer communication network use SDN software-defined network technology for communication.

[0006] Further, the upper application communication network includes: photovoltaic power station, remote machine, measurement and control device, AGC automatic power generation control substation, dispatching master station; the data transmitted includes: distributed photovoltaic system node power quality data, monitoring data, dispatching control instruction; the access communication protocol includes Modbus, TCP transmission control protocol, MQTT message queue telemetry transmission, OPC object linking and embedding process control, BacNet, IEC 60870-5-104, DL / T 698.45, Q / GW 1376.1 and DL / T 1867.

[0007] Further, the distributed photovoltaic system node power quality data includes: power supply frequency, power supply voltage, voltage imbalance, sudden rise, sudden drop, interruption, rapid voltage change, harmonic / interharmonic THD total harmonic distortion and flicker.

[0008] Further, the lower communication network access mode includes: node local communication access and upper link communication access.

[0009] Further, the node local communication access includes: optical fiber, Ethernet, serial port, PLC power line broadband carrier communication, WiFi wireless network communication technology, Lora long-distance radio, NB-IoT narrowband Internet of Things and Zigbee purple bee protocol.

[0010] Further, the upper link communication access includes: optical fiber, Ethernet, power wireless private network and mobile operator 4G / 5G network.

[0011] Further, the upper application communication network and the lower communication network establish a logical mapping relationship according to communication requirements, and the specific mapping relationship is as follows: the upper application node set is , the lower communication node set is , the communication is divided into different time slots, and a one-to-one determined mapping relationship is established in each time slot U and L . Wherein, when the upper node has communication capability, is set ; according to the communication requirement of the distributed photovoltaic node in the time slot T, the upper application node set that needs to communicate is determined, the lower node set is inquired, a logical link is established, and the upper application network communication requirement is mapped into the bottom network data communication; at the sending end, the upper application communication network data packet is taken as the data item of the lower data packet; at the receiving end, the upper application communication receiving node extracts the data item field from the lower data packet and obtains the data.

[0012] The distributed photovoltaic communication network multi-protocol application layer networking method provided by the application includes:

[0013] The setting module is configured to be arranged in the upper-layer application communication network and the lower-layer communication network respectively.

[0014] The mapping module is configured to establish a logical mapping relationship between the upper-layer application communication network and the lower-layer communication network according to communication requirements, and map the upper-layer distributed photovoltaic networking service flow to the lower-layer communication network.

[0015] The SDN module is configured to utilize SDN (Software Defined Network) technology to communicate between the upper-layer application communication network and the lower-layer communication network.

[0016] Further, in the setting module, the upper-layer application communication network includes a photovoltaic power station, a remote machine, a monitoring and control device, an AGC (Automatic Generation Control) substation, and a dispatching master station; the data transmitted includes distributed photovoltaic system node power quality data, monitoring data, and dispatching control instructions; and the access communication protocols include Modbus, TCP (Transmission Control Protocol), MQTT (Message Queue Telemetry Transport), OPC (Object Linking and Embedding Process Control), BacNet, IEC 60870-5-104, DL / T 698.45, Q / GW1376.1, and DL / T 1867.

[0017] Further, in the setting module, the distributed photovoltaic system node power quality data includes power supply frequency, power supply voltage, voltage imbalance, sudden rise, sudden drop, interruption, rapid voltage change, harmonic / inter-harmonic THD (Total Harmonic Distortion), and flicker.

[0018] Further, in the setting module, the lower-layer communication network access mode includes node local communication access and uplink communication access.

[0019] Further, in the setting module, the node local communication access includes optical fiber, Ethernet, serial port, PLC (Power Line Carrier) broadband carrier communication, WiFi (Wireless Fidelity) wireless network communication technology, Lora (Long Range Radio), NB-IoT (Narrow Band Internet of Things), and Zigbee (ZigBee Protocol).

[0020] Further, in the setting module, the uplink communication access system includes optical fiber, Ethernet, power wireless private network, and mobile operator 4G / 5G network.

[0021] Further, in the mapping module, the upper-layer application communication network and the lower-layer communication network establish a logical mapping relationship according to communication requirements, and the specific process is as follows: let the upper-layer application node set be , the lower-layer communication node set be , divide the communication into different time slots, and establish a one-to-one determined mapping relationship between each time slot U and L . , when the upper-layer node has communication capability, set Based on the communication requirements of the distributed photovoltaic nodes in time slot T, determine the set of upper-layer application nodes that need to communicate. Query the set of lower-level nodes A logical link is established to map the network communication requirements of upper-layer applications to the network data communication of lower-layer applications. At the sending end, the network data packets of upper-layer applications serve as data items of lower-layer data packets. At the receiving end, the receiving nodes of upper-layer applications extract data item fields from the lower-layer data packets to obtain the data.

[0022] An electronic device according to the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is loaded onto the processor, it implements a multi-protocol application layer networking method for a distributed photovoltaic communication network as described in any one of the present invention.

[0023] The present invention provides a storage medium storing a computer program, which, when executed by a processor, implements any of the following distributed photovoltaic communication network multi-protocol application layer networking methods.

[0024] Beneficial Effects: Compared with existing technologies, this invention has the following significant advantages: It adopts an overlay network architecture, mapping the networking requirements of upper-layer application nodes in a distributed photovoltaic system for power services to the network communication traffic of lower-layer physical communication nodes, providing guidance for lower-layer network scheduling and achieving cross-layer optimization. It proposes an encapsulation format and mapping method for upper-lower layer data packets, realizing cross-layer data transmission. Attached Figure Description

[0025] Figure 1 This is the overall flowchart of the present invention. Detailed Implementation

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0027] like Figure 1 As shown, this embodiment of the invention provides a multi-protocol application layer networking method for a distributed photovoltaic (PV) communication network, comprising the following steps: the distributed PV network is respectively set up in an upper-layer application communication network and a lower-layer communication network; the upper-layer application communication network and the lower-layer communication network establish a logical mapping relationship according to communication requirements, and the service traffic of the upper-layer distributed PV network is mapped to the lower-layer communication network; the upper-layer application communication network and the lower-layer communication network are independent of each other; the upper-layer application communication network and the lower-layer communication network communicate using SDN (Software Defined Networking) technology; wherein,

[0028] The upper-layer application communication network comprises photovoltaic power stations, remote control machines, measurement and control devices, AGC automatic power generation control sub-stations and dispatching master stations; the data transmitted comprises distributed photovoltaic system node power quality data, monitoring data and dispatching control instructions; the access communication protocols comprise Modbus, TCP transmission control protocol, MQTT message queue telemetry transmission, OPC object linking and embedding process control, BacNet, IEC 60870-5-104, DL / T 698.45, Q / GW 1376.1 and DL / T 1867.

[0029] The distributed photovoltaic system node power quality data comprises power supply frequency, power supply voltage, voltage imbalance, sudden rise, sudden drop, interruption, rapid voltage change, harmonic / inter-harmonic THD total harmonic distortion and flicker.

[0030] The lower-layer communication network access mode comprises node local communication access and uplink communication access. The node local communication access comprises optical fiber, Ethernet, serial port, PLC power line broadband carrier communication, WiFi wireless network communication technology, Lora long-distance radio, NB-IoT narrowband Internet of Things and Zigbee purple bee protocol. The uplink communication access comprises optical fiber, Ethernet, power wireless private network and mobile operator 4G / 5G network.

[0031] The upper-layer application communication network and the lower-layer communication network establish a logical mapping relationship according to communication requirements as follows: let the upper-layer application node set be , the lower-layer communication node set be , divide the communication into different time slots, establish a one-to-one determined mapping relationship in each time slot U and L . When the upper-layer node has communication capability, set ; according to the distributed photovoltaic node communication requirement in the time slot T, determine the upper-layer application node set that needs to communicate, query the lower-layer node set , establish a logical link and map the upper-layer application network communication requirement into the bottom-layer network data communication; at the sending end, the upper-layer application communication network data packet is taken as the data item of the lower-layer data packet; at the receiving end, the upper-layer application communication network receiving node extracts the data item field from the lower-layer data packet and obtains the data.

[0032] The upper-layer application communication network data packet format is as follows:

[0033] .

[0034] The lower-layer network communication data packet format is as follows:

[0035] .

[0036] At the sending end, the upper-layer application communicates network data packet as the data item of the lower-layer data packet; at the receiving end, the upper-layer application communication network receiving node extracts the data item field from the lower-layer data packet to obtain data.

[0037] The embodiment of the application further provides a distributed photovoltaic communication network multi-protocol application layer networking method, comprising:

[0038] The setting module is used for setting the distributed photovoltaic networking in the upper-layer application communication network and the lower-layer communication network respectively; the upper-layer application communication network comprises a photovoltaic power station, a remote machine, a monitoring and control device, an AGC automatic power generation control substation and a dispatching master station; the data to be transmitted comprises distributed photovoltaic system node power quality data, monitoring data and dispatching control instructions; the access communication protocols comprise Modbus, TCP transmission control protocol, MQTT message queue telemetry transmission, OPC object linking and embedding process control, BacNet, IEC 60870-5-104, DL / T 698.45, Q / GW 1376.1 and DL / T 1867; the distributed photovoltaic system node power quality data comprises power supply frequency, power supply voltage, voltage imbalance, sudden rise, sudden drop, interruption, rapid voltage change, harmonic / interharmonic THD total harmonic distortion and flicker; the lower-layer communication network access mode comprises node local communication access and uplink communication access; the node local communication access comprises optical fiber, Ethernet, serial port, PLC power line broadband carrier communication, WiFi wireless network communication technology, Lora long-distance radio, NB-IoT narrowband Internet of Things and Zigbee purple bee protocol; the uplink communication access system comprises optical fiber, Ethernet, power wireless private network and mobile operator 4G / 5G network.

[0039] The mapping module is used for establishing a logical mapping relationship between the upper-layer application communication network and the lower-layer communication network according to communication requirements; the upper-layer distributed photovoltaic networking business flow is mapped to the lower-layer communication network; specifically, the upper-layer application node set is , the lower-layer communication node set is , the communication is divided into different time slots, and a one-to-one determined mapping relationship is established between each time slot U and L . , when the upper-layer node has communication capability, is set ; according to the distributed photovoltaic node communication requirement in the time slot T, the upper-layer application node set that needs to communicate is determined, and the lower-layer node set is inquired.The logical link is established, and network communication requirements of an upper layer application are mapped to bottom layer network data communication; at a sending end, network data packets of the upper layer application communication are taken as data items of lower layer data packets; and at a receiving end, a network receiving node of the upper layer application communication extracts data item fields from the lower layer data packets to obtain data.

[0040] The SDN module is used for the upper layer application communication network and the lower layer communication network to communicate by using SDN (Software Defined Network) technology.

[0041] The embodiment of the application further provides an electronic device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, and the computer program implements the distributed photovoltaic communication network multi-protocol application layer networking method when being loaded to the processor.

[0042] The embodiment of the application further provides a storage medium, which stores a computer program, and the computer program implements the distributed photovoltaic communication network multi-protocol application layer networking method when being executed by a processor.

Claims

1. A method for multi-protocol application layer networking of distributed photovoltaic communication networks, characterized in that, Comprise the following steps: The distributed photovoltaic networking is respectively arranged in the upper layer application communication network and the lower layer communication network; the upper layer application communication network and the lower layer communication network establish logical mapping relationship according to communication demand, and the upper layer distributed photovoltaic networking service flow is mapped to the lower layer communication network; the upper layer application communication network and the lower layer communication network utilize SDN software defined network technology to communicate; wherein, the upper layer application communication network comprises: photovoltaic power station, remote machine, measurement and control device, AGC automatic power generation control substation, dispatching master station; the data transferred comprises: distributed photovoltaic system node electric energy quality data, monitoring data, dispatching control instruction; the access communication protocol comprises Modbus, TCP transmission control protocol, MQTT message queue telemetry transmission, OPC object link and embedded process control, BacNet, IEC 60870-5-104, DL / T 698.45, Q / GW 1376.1, DL / T 1867; the distributed photovoltaic system node electric energy quality data comprises: power frequency, power voltage, voltage imbalance / rapid rise / fall / interruption, rapid voltage change, harmonic / interharmonic THD total harmonic distortion, flicker; the lower layer communication network access mode comprises: node local communication access, uplink communication access; the upper layer application communication network and the lower layer communication network establish logical mapping relationship according to communication demand as follows: Let the upper application node set be U = {U1, U2, …, U n}, the lower communication node set be L = {L1, L2, …, L n}, and the communication be divided into different time slots, a one-to-one determined mapping relationship R: <U i -L j > be established between U and L in each time slot, wherein when the upper node has communication capability, i = j is set; according to the distributed photovoltaic node communication demand in the time slot T, the upper application node set U T = {U1, U2, …, U k} needing communication is determined, the lower node set L T = {L1, L2, …, L k} is queried, a logical link is established, and the upper application application network communication demand is mapped to the bottom layer network data communication; at the sending end, the upper application communication network data packet is taken as the data item of the lower layer data packet; at the receiving end, the upper application communication network receiving node extracts the data item field from the lower layer data packet to obtain data.

2. The method of claim 1, wherein the method further comprises: The node local communication access comprises: optical fiber, Ethernet, serial port, PLC power line broadband carrier communication, WiFi wireless network communication technology, Lora long-distance radio, NB-IoT narrowband Internet of Things, Zigbee purple bee protocol.

3. The method of claim 1, wherein the method further comprises: The uplink communication access comprises: optical fiber, Ethernet, power wireless private network, mobile operator 4G / 5G network.

4. A distributed photovoltaic communication network multi-protocol application layer networking system, characterized in that, Comprise: The setting module is used for the distributed photovoltaic networking to be respectively arranged in the upper layer application communication network and the lower layer communication network; The upper layer application communication network comprises: photovoltaic power station, remote machine, measurement and control device, AGC automatic power generation control substation, dispatching master station; the data transferred comprises: distributed photovoltaic system node electric energy quality data, monitoring data, dispatching control instruction; the access communication protocol comprises Modbus, TCP transmission control protocol, MQTT message queue telemetry transmission, OPC object link and embedded process control, BacNet, IEC 60870-5-104, DL / T 698.45, Q / GW 1376.1, DL / T 1867; the distributed photovoltaic system node electric energy quality data comprises: power frequency, power voltage, voltage imbalance / rapid rise / fall / interruption, rapid voltage change, harmonic / interharmonic THD total harmonic distortion, flicker; the lower layer communication network access mode comprises: node local communication access, uplink communication access; The mapping module is used for the upper layer application communication network and the lower layer communication network to establish logical mapping relationship according to communication demand; the upper layer distributed photovoltaic networking service flow is mapped to the lower layer communication network; the upper layer application communication network and the lower layer communication network establish logical mapping relationship according to communication demand as follows: Let the upper application node set be U = {U1, U2, …, U n}, the lower communication node set be L = {L1, L2, …, L n}, and the communication be divided into different time slots, a one-to-one determined mapping relationship R: <U i -L j > be established between U and L in each time slot, wherein when the upper node has communication capability, i = j is set; according to the distributed photovoltaic node communication demand in the time slot T, the upper application node set U T = {U1, U2, …, U k} needing communication is determined, the lower node set L T = {L1, L2, …, L k} is queried, a logical link is established, and the upper application application network communication demand is mapped to the bottom layer network data communication; at the sending end, the upper application communication network data packet is taken as the data item of the lower layer data packet; at the receiving end, the upper application communication network receiving node extracts the data item field from the lower layer data packet to obtain data; SDN module: for the upper layer application communication network and the lower layer communication network to communicate by using SDN software defined network technology.

5. The distributed photovoltaic communication network multi-protocol application layer networking system according to claim 4, characterized in that, In the setting module, the node local communication access includes optical fiber, Ethernet, serial port, PLC power line broadband carrier communication, WiFi wireless network communication technology, Lora long-distance radio, NB-IoT narrowband Internet of Things, Zigbee purple bee protocol.

6. The method of claim 4, wherein the method further comprises: In the setting module, the upper connection communication access system includes optical fiber, Ethernet, power wireless private network and mobile operator 4G / 5G network.

7. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The computer program is loaded into the processor to realize the distributed photovoltaic communication network multi-protocol application layer networking method according to any one of claims 1-3.

8. A storage medium storing a computer program, characterized by The computer program is executed by the processor to realize the distributed photovoltaic communication network multi-protocol application layer networking method according to any one of claims 1-3.

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