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

Abstract

The invention discloses a multi-protocol application layer networking method, system and device for a distributed photovoltaic communication network and a storage medium. The method comprises the following steps that distributed photovoltaic networking is arranged in an upper-layer application communication network and a lower-layer communication network respectively; the upper-layer application communication network and the lower-layer communication network establish a logic mapping relation according to communication requirements, and upper-layer distributed photovoltaic networking service traffic is mapped to the lower-layer communication network; the upper-layer application communication network and the lower-layer communication network are mutually independent; the upper-layer application communication network and the lower-layer communication network communicate by using an SDN software defined network technology; according to the invention, upper and lower layer cross-layer data transmission is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of distributed photovoltaic systems, and in particular to a distributed photovoltaic communication network multi-protocol application layer networking method. Background Art

[0002] Faced with the high dynamics of multi-granularity sliced ​​heterogeneous resources of distributed photovoltaics in resource-intensive areas, the traditional network slice resource adjustment mechanism that allocates fixed resources to network nodes and links cannot respond to emergencies such as traffic explosions in a timely manner. The network status and business needs at future times are unknown to upper-level decision makers, resulting in a lag in the current network slice resource allocation decision-making in responding to user behavior. Therefore, it is necessary to reconsider the slice adjustment strategy to effectively respond to traffic mutations and achieve accurate and effective adjustment of slice resource allocation.

[0003] Distributed terminal access has the business characteristics of diversified services, diversified communications and local high density. When diversified services are carried, the communication requirements of different acquisition services and control services vary greatly, and differentiated communication services need to be provided. However, the traditional data communication method based on physical networks is disconnected from the upper-layer application services, making it difficult to achieve high-bandwidth, low-latency, and flexible networking upper-layer business support, and to achieve efficient scheduling of high-penetration distributed photovoltaic resources in high-density load areas, further optimize business latency, and ensure diversified business needs under high-load conditions. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a multi-protocol application layer networking method for a distributed photovoltaic communication network, in which the upper-layer distributed photovoltaic networking service traffic is mapped to the lower-layer communication network, the upper-layer application network is topologically independent of the lower-layer communication network, and the SDN technology is used to control the communication traffic. The two layers cooperate with each other to realize distributed photovoltaic logical networking and flexible communication.

[0005] Technical solution: The multi-protocol application layer networking method of a distributed photovoltaic communication network described in the present invention comprises the following steps: the distributed photovoltaic networking is respectively arranged 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 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 are independent of each other; the upper-layer application communication network and the lower-layer communication network communicate using SDN software-defined network technology.

[0006] Furthermore, the upper-layer application communication network includes: photovoltaic power stations, telemotors, measurement and control devices, AGC automatic power generation control substations, and dispatching master stations; the transmitted data includes: distributed photovoltaic system node power quality data, monitoring data, and dispatching control instructions; the access communication protocols include 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] Furthermore, the power quality data of the distributed photovoltaic system nodes include: power frequency, power voltage, voltage imbalance / swell / sag / interruption, rapid voltage change, harmonic / interharmonic THD total harmonic distortion, and flicker.

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

[0009] Furthermore, 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 protocol.

[0010] Furthermore, upstream communication access includes: optical fiber, Ethernet, power wireless private network, and mobile operator 4G / 5G network.

[0011] Furthermore, the upper layer application communication network and the lower layer communication network establish a logical mapping relationship according to the communication requirements as follows: Assume that the upper layer application node set is , the lower layer communication node set is , divide the communication into different time slots, and in each time slot U and L Establish a one-to-one mapping relationship: , where when the upper node has communication capability, set ; According to the communication requirements of distributed photovoltaic nodes in time slot T, determine the set of upper-layer application nodes that need to communicate , query the lower node set , establish a logical link, map the upper-layer application network communication requirements to the underlying network data communication; at the sending end, the upper-layer application communication network data packet is used 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 the data.

[0012] The present invention provides a distributed photovoltaic communication network multi-protocol application layer networking method, comprising: Setting module: used for distributed photovoltaic networking and setting up the upper application communication network and the lower communication network respectively; Mapping module: used to establish 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 network service traffic is mapped to the lower-layer communication network; SDN module: used for upper-layer application communication network and lower-layer communication network to communicate using SDN software-defined network technology.

[0013] Furthermore, in the setting module, the upper-level application communication network includes: photovoltaic power station, remote motor, measurement and control device, AGC automatic power generation control substation, and dispatching master station; the transmitted data includes: distributed photovoltaic system node power quality data, monitoring data, and dispatching control instructions; the access communication protocols include 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 / GW1376.1, and DL / T 1867.

[0014] Furthermore, in the setting module, the power quality data of the distributed photovoltaic system nodes include: power frequency, power voltage, voltage imbalance / swell / sag / interruption, rapid voltage change, harmonic / interharmonic THD total harmonic distortion, and flicker.

[0015] Furthermore, in the setting module, the lower layer communication network access mode includes: node local communication access and upper link communication access.

[0016] Furthermore, 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, and Zigbee protocol.

[0017] Furthermore, in the setting module, the upstream communication access system includes optical fiber, Ethernet, power wireless private network, and mobile operator 4G / 5G network.

[0018] Furthermore, in the mapping module, the upper layer application communication network and the lower layer communication network establish a logical mapping relationship according to the communication requirements as follows: Assume that the upper layer application node set is , the lower layer communication node set is , divide the communication into different time slots, and in each time slot U and L Establish a one-to-one mapping relationship: , where when the upper node has communication capability, set ; According to the communication requirements of distributed photovoltaic nodes in time slot T, determine the set of upper-layer application nodes that need to communicate , query the lower node set , establish a logical link, map the upper-layer application network communication requirements to the underlying network data communication; at the sending end, the upper-layer application communication network data packet is used 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 the data.

[0019] An electronic device described in 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 into the processor, any one of the multi-protocol application layer networking methods for a distributed photovoltaic communication network is implemented.

[0020] A storage medium described in the present invention stores a computer program, and when the computer program is executed by a processor, it implements any one of the multi-protocol application layer networking methods for a distributed photovoltaic communication network.

[0021] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: using an overlay network architecture, the upper-layer application nodes of the distributed photovoltaic system are mapped to the network communication traffic of the lower-layer physical communication nodes, providing guidance for the lower-layer network scheduling, and realizing cross-layer optimization. The encapsulation format and mapping method of the upper-layer and lower-layer data packets are proposed, realizing cross-layer data transmission between the upper and lower layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the overall flow chart of the present invention. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0024] like Figure 1 As shown, the embodiment of the present invention provides a distributed photovoltaic communication network multi-protocol application layer networking method, including the following steps: the distributed photovoltaic network is respectively set up in the upper application communication network and the lower communication network; the upper application communication network and the lower communication network establish a logical mapping relationship according to the communication requirements, and the upper distributed photovoltaic networking service flow is mapped to the lower communication network; the upper application communication network and the lower communication network are independent of each other; the upper application communication network and the lower communication network communicate using SDN software defined network technology; wherein, The upper-layer application communication network includes: photovoltaic power stations, telemotors, measurement and control devices, AGC automatic generation control substations, and dispatching master stations; the transmitted data includes: distributed photovoltaic system node power quality data, monitoring data, and dispatching control instructions; the access communication protocols include 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.

[0025] The power quality data of distributed photovoltaic system nodes include: power frequency, power voltage, voltage imbalance / swell / sag / interruption, rapid voltage change, harmonic / interharmonic THD total harmonic distortion, and flicker.

[0026] The lower layer communication network access methods include: node local communication access and upper link communication access. Among them, 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 protocol. Upper link communication access includes: optical fiber, Ethernet, power wireless private network, mobile operator 4G / 5G network.

[0027] The upper layer application communication network and the lower layer communication network establish a logical mapping relationship based on communication requirements as follows: Assume that the upper layer application node set is , the lower layer communication node set is , divide the communication into different time slots, and in each time slot U and L Establish a one-to-one mapping relationship: , where when the upper node has communication capability, set ; According to the communication requirements of distributed photovoltaic nodes in time slot T, determine the set of upper-layer application nodes that need to communicate , query the lower node set , establish a logical link, map the upper-layer application network communication requirements to the underlying network data communication; at the sending end, the upper-layer application communication network data packet is used 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 the data.

[0028] Among them, the upper layer application communication network data packet format is as follows: ; The format of the lower layer network communication data packet is as follows: ; At the sending end, the upper-layer application communication network data packet is used 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 the data.

[0029] The embodiment of the present invention also provides a distributed photovoltaic communication network multi-protocol application layer networking method, including: Setting module: used for distributed photovoltaic networking, which is set up in the upper application communication network and the lower communication network respectively; the upper application communication network includes: photovoltaic power station, telemotors, measurement and control devices, AGC automatic generation control substation, and dispatching master station; the transmitted data includes: distributed photovoltaic system node power quality data, monitoring data, and dispatching control instructions; the access communication protocols include 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 includes: power frequency, power voltage, voltage imbalance / swell / sag / interruption, rapid voltage change, harmonic / interharmonic THD total harmonic distortion, and flicker. The lower communication network access methods include: node local communication access and upper communication access. Among them, 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 protocol. Uplink communication access system: including optical fiber, Ethernet, power wireless private network, mobile operator 4G / 5G network.

[0030] Mapping module: used to establish 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 network service flow is mapped to the lower-layer communication network; the details are as follows: Assume that the upper-layer application node set is , the lower layer communication node set is , divide the communication into different time slots, and in each time slot U and L Establish a one-to-one mapping relationship: , where when the upper node has communication capability, set ; According to the communication requirements of distributed photovoltaic nodes in time slot T, determine the set of upper-layer application nodes that need to communicate , query the lower node set , establish a logical link, map the upper-layer application network communication requirements to the underlying network data communication; at the sending end, the upper-layer application communication network data packet is used 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 the data.

[0031] SDN module: used for upper-layer application communication network and lower-layer communication network to communicate using SDN software-defined network technology.

[0032] An embodiment of the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the computer program is loaded into the processor, the computer program implements any one of the multi-protocol application layer networking methods for a distributed photovoltaic communication network.

[0033] An embodiment of the present invention further provides a storage medium storing a computer program, wherein the computer program, when executed by a processor, implements any one of the multi-protocol application layer networking methods for a distributed photovoltaic communication network.

Claims

1. A distributed photovoltaic communication network multi-protocol application layer networking method, characterized in that: The following steps are involved: Distributed photovoltaic networking is set up in the upper-layer application communication network and the lower-layer communication network respectively; the upper-layer application communication network and the lower-layer communication network establish a logical mapping relationship according to communication requirements, and the upper-layer distributed photovoltaic networking service traffic is mapped to the lower-layer communication network; the upper-layer application communication network and the lower-layer communication network communicate using SDN software-defined network technology.

2. A distributed photovoltaic communication network multi-protocol application layer networking method according to claim 1, characterized in that: The upper-layer application communication network includes: photovoltaic power stations, telemotors, measurement and control devices, AGC automatic generation control substations, and dispatching master stations; the transmitted data includes: distributed photovoltaic system node power quality data, monitoring data, and dispatching control instructions; the access communication protocols include 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.

3. A distributed photovoltaic communication network multi-protocol application layer networking method according to claim 2, characterized in that: The power quality data of distributed photovoltaic system nodes include: power frequency, power voltage, voltage imbalance / swell / sag / interruption, rapid voltage change, harmonic / interharmonic THD total harmonic distortion, and flicker.

4. A distributed photovoltaic communication network multi-protocol application layer networking method according to claim 1, characterized in that: The lower layer communication network access methods include: node local communication access and upper link communication access.

5. A distributed photovoltaic communication network multi-protocol application layer networking method according to claim 4, characterized in that: 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 protocol.

6. A distributed photovoltaic communication network multi-protocol application layer networking method according to claim 4, characterized in that: Uplink communication access includes: optical fiber, Ethernet, power wireless private network, and mobile operator 4G / 5G network.

7. A distributed photovoltaic communication network multi-protocol application layer networking method according to claim 1, characterized in that: The upper layer application communication network and the lower layer communication network establish a logical mapping relationship based on communication requirements as follows: Assume that the upper layer application node set is , the lower layer communication node set is , divide the communication into different time slots, and in each time slot U and L Establish a one-to-one mapping relationship: , where when the upper node has communication capability, set ; According to the communication requirements of distributed photovoltaic nodes in time slot T, determine the set of upper-layer application nodes that need to communicate , query the lower node set , establish a logical link, map the upper-layer application network communication requirements to the underlying network data communication; at the sending end, the upper-layer application communication network data packet is used 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 the data.

8. A distributed photovoltaic communication network multi-protocol application layer networking method, characterized in that: include: Setting module: used for setting distributed photovoltaic networking in upper application communication network and lower communication network respectively; Mapping module: used to establish 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 network service traffic is mapped to the lower-layer communication network; SDN module: used for upper-layer application communication network and lower-layer communication network to communicate using SDN software-defined network technology.

9. A distributed photovoltaic communication network multi-protocol application layer networking system according to claim 8, characterized in that: In the setting module, the upper-layer application communication network includes: photovoltaic power station, telemotors, measurement and control devices, AGC automatic power generation control substation, and dispatching master station; the transmitted data includes: distributed photovoltaic system node power quality data, monitoring data, and dispatching control instructions; the access communication protocols include 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.

10. A distributed photovoltaic communication network multi-protocol application layer networking system according to claim 9, characterized in that: In the setting module, the power quality data of the distributed photovoltaic system nodes include: power frequency, power voltage, voltage imbalance / swell / sag / interruption, rapid voltage change, harmonic / interharmonic THD total harmonic distortion, and flicker.

11. A distributed photovoltaic communication network multi-protocol application layer networking system according to claim 8, characterized in that: In the setting module, the lower-layer communication network access methods include: node local communication access and upper-link communication access.

12. A distributed photovoltaic communication network multi-protocol application layer networking system according to claim 11, characterized in that: In the setting module, 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 protocol.

13. A distributed photovoltaic communication network multi-protocol application layer networking method according to claim 11, characterized in that: In the setting module, the upstream communication access system includes optical fiber, Ethernet, power wireless private network, and mobile operator 4G / 5G network.

14. A distributed photovoltaic communication network multi-protocol application layer networking system according to claim 8, characterized in that: In the mapping module, the upper layer application communication network and the lower layer communication network establish a logical mapping relationship according to the communication requirements as follows: Assume that the upper layer application node set is , the lower layer communication node set is , divide the communication into different time slots, and in each time slot U and L Establish a one-to-one mapping relationship: , where when the upper node has communication capability, set ; According to the communication requirements of distributed photovoltaic nodes in time slot T, determine the set of upper-layer application nodes that need to communicate , query the lower node set , establish a logical link, map the upper-layer application network communication requirements to the underlying network data communication; at the sending end, the upper-layer application communication network data packet is used 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 the data.

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

16. A storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, a distributed photovoltaic communication network multi-protocol application layer networking method according to any one of claims 1 to 7 is implemented.

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