Power distribution area-oriented power flux-inductance calculation network layered architecture and management and arrangement method of power distribution area-oriented power flux-inductance calculation network layered architecture

Abstract

The invention belongs to the technical field of power distribution network layered architecture design, and discloses a power distribution area-oriented power flux calculation network layered architecture and a management and arrangement method. An infrastructure layer, a virtualization layer, a function layer and an application layer of the architecture sequentially carry out data transmission; the infrastructure layer comprises a sensing unit, a communication unit and a calculation unit; the hardware resources of the virtualization layer comprise sensing hardware, network hardware, computing hardware and storage hardware; the function layer comprises a virtual network slice selection function, a virtual network storage function, a virtual network capability opening function, an application function, a strategy control function and the like; the application layer comprises equipment operation monitoring, topology automatic identification, distributed energy management, load prediction and optimization, and electric energy quality management. According to the invention, part of management functions are carried out between architecture layers, the complexity of transverse interaction with the NFV management arrangement module is reduced, and the management efficiency of the functional network element module can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution network layered architecture design, and in particular to a power communication computing network layered architecture and management arrangement method for distribution station areas. Background Art

[0002] As the trend of intelligent equipment development in distribution networks deepens, the coupling degree of the three domains of communication, perception, and computing increases, and the number of access devices increases, the problems of complex resources, numerous devices, individual heterogeneity, and inflexible resource management in distribution networks are gradually exposed. In particular, the heterogeneity between new and old equipment, different models, and manufacturers' equipment requires frequent replacement and maintenance of equipment during the construction of distribution networks, increasing construction costs. In addition, there are interface problems and resource interoperability problems between different devices in the three domains of communication, perception, and technology. The increasingly complex interface types and matching protocols have also increased the difficulty of actual distribution network networking.

[0003] Traditional research on distribution network architecture focuses only on the deployment modules of hardware facilities, and carries out hierarchical and modular network architecture design, which is committed to solving the problem of device heterogeneity in distribution networks in terms of interface protocols. However, traditional distribution network architecture design is gradually unable to solve the problem of deep integration of telecomputing and device heterogeneity. However, the emerging virtualization technology provides an effective solution to the above problems, that is, through virtualization technology, the reasonable splitting and logical recombination of underlying physical resources can be achieved, the physical hardware resources can be maximized, the complexity of resource management can be reduced, and the flexibility of resource management can be improved. By virtualizing the hardware facility resources in the distribution network into virtual resources, the interface heterogeneity problem at the hardware level can be converted into the interface problem at the software level, thereby solving the hardware heterogeneity problem and the interface problem.

[0004] Therefore, it is of great value to build an integrated network architecture for distribution network communication, sensing and computing that can solve the access problem of heterogeneous devices and has wide-area communication capabilities, multi-dimensional fusion perception capabilities and distributed collaborative computing capabilities. Summary of the invention

[0005] The purpose of the present invention is to propose a hierarchical architecture and management arrangement method of a power communication computing network for distribution stations.

[0006] A layered architecture of a power telecomputing network for distribution substations, including an infrastructure layer, a virtualization layer, a functional layer, and an application layer;

[0007] Among them, the infrastructure layer, virtualization layer, functional layer, and application layer carry out data transmission in sequence;

[0008] The infrastructure layer includes perception units, communication units, and computing units;

[0009] The hardware resources of the virtualization layer include perception hardware, network hardware, computing hardware, and storage hardware;

[0010] The sensing unit is connected to the sensing hardware, the communication unit is connected to the network hardware, and the computing hardware and the storage hardware are respectively connected to the computing unit;

[0011] The functional layer includes virtual network slice selection function, virtual network storage function, virtual network capability exposure function, application function, policy control function, general data management function, authentication service function, service communication proxy function, access and mobility management function, and session management function;

[0012] The application layer includes equipment operation monitoring, automatic topology identification, distributed energy management, load forecasting and optimization, and power quality management.

[0013] The sensing unit, communication unit, and computing unit perform data transmission in sequence.

[0014] The sensing unit includes dancing sensor, smart meter, partial discharge sensor, temperature sensor, FTU terminal, distributed fault indicator, video monitor, meter box and data collector.

[0015] The communication protocols of the communication unit include ZigBee, RS485, LoRa, Ethernet, EPON, WiFi, RS232, and HPLC.

[0016] The computing unit includes edge base stations and cloud servers.

[0017] The virtualized resources obtained after virtualization of the hardware resources of the virtualization layer include: virtual sensor nodes, TAP / TUN, virtual CPU, virtual machine disk, virtual sensor, virtual switch, virtual memory, virtual hard disk;

[0018] Virtualized resources have virtual network slice selection function, virtual network storage function, and virtual network capability exposure function.

[0019] The functional layer also includes user terminals, wireless access networks, user plane functions, and data networks; the user terminals and wireless access networks are connected to the mobility management function through the N1 interface and the N2 interface respectively; the user terminals are connected to the wireless access network; the wireless access network is connected to the user plane function through the N3 interface; the user plane function is connected to the user plane function, the session management function, and the data network through the N9 interface, the N4 interface, and the N6 interface respectively;

[0020] The virtual network slice selection function accesses the bus through Nvnssf, the virtual network storage function accesses the bus through Nvnre, the virtual network capability exposure function accesses the bus through Nvnef, the application function accesses the bus through Naf, the policy control function accesses the bus through Npcf, the general data management function accesses the bus through Nudm, the authentication service function accesses the bus through Nausf, the service communication agent function accesses the bus, the access and mobility management function accesses the bus through Namf, and the session management function accesses the bus through Nsmf.

[0021] A management and arrangement method for a hierarchical architecture of a power communication computing network for a distribution substation area includes the following steps:

[0022] Step S101: before creating a management network element module, the NFV orchestrator sends a request to the VNF management module to create a basic management network element module and waits for feedback information on whether the module can be created;

[0023] Step S102: After the VNF management module receives the request sent by the NFV orchestrator, it calculates the hardware and virtual resources consumed by creating the required network element module according to the sent request information;

[0024] Step S103: After the VNF management module calculates the creation resource consumption, it transmits the information of whether the creation can be done and the calculation result to the NFV orchestrator;

[0025] Step S104: After the NFV orchestrator receives the network element creation information and resource occupancy estimate fed back by the VNF management module, the NFV orchestrator transmits this information to the resource management module;

[0026] Step S105: The resource management module transmits virtual resource information required by the management network element function module to the infrastructure layer;

[0027] Step S106: The infrastructure layer submits corresponding network, computing, and storage resource virtualization requests to the virtualization layer;

[0028] Step S107: the virtualization layer creates a virtual machine according to the request information;

[0029] Step S108: the virtualization layer directly feeds back the virtual resource allocation result to the resource management module;

[0030] Step S109: The resource management module reports to the NFV orchestrator that the virtual machine has been created;

[0031] Step S110: The NFV orchestrator notifies the VNF management module to create a management network element function module on the created virtual machine;

[0032] Step S111: The VNF management module creates a function layer network element management module on the configured virtual machine;

[0033] Step S112: After creating the function layer network element management module, the VNF management module reports to the NFV orchestrator that the function layer management network element module has been created;

[0034] Step S113: Check the end-to-end topology of the created virtual machine;

[0035] Step S114: The NFV orchestrator sends a request to create a functional network element module to the VNF management module;

[0036] Step S115: The VNF management module calculates the resources required to create the functional network element module;

[0037] Step S116: presetting the parameter configurations such as access and session of the newly added functional network element module;

[0038] Step S117: The VNF management module feeds back the virtual machine and computing resource information required to create the functional network element module to the NFV orchestrator;

[0039] Step S118: After the NFV orchestrator receives the network element creation information and resource occupancy estimate fed back by the VNF management module, the NFV orchestrator transmits this information to the resource management module;

[0040] Step S119: the resource management module transmits the virtual resource information required by the management network element function module to the infrastructure layer;

[0041] Step S120: The infrastructure layer submits corresponding network, computing, and storage resource virtualization requests to the virtualization layer;

[0042] Step S121: the virtualization layer creates a virtual machine according to the request information;

[0043] Step S122: the virtualization layer directly feeds back the virtual resource allocation result to the resource management module;

[0044] Step S123: The resource management module reports to the NFV orchestrator that the virtual machine has been created;

[0045] Step S124: the NFV orchestrator notifies the VNF management module to create a management network element function module on the created virtual machine;

[0046] Step S125: The VNF management module creates a functional network element module on the newly created virtual machine;

[0047] Step S126: The VNF management module transmits the functional network element module creation completion information to the functional layer management network element module, and the functional layer management network element module configures the authentication and data path management rules for the newly created network element, and delegates the management function of the VNF management module for the newly created functional network element to the management network element module;

[0048] Step S127: The VNF management module notifies the NFV orchestrator functional layer that the newly added functional network element module has been created.

[0049] The beneficial effects of the present invention are:

[0050] 1. The architecture proposed in the present invention sorts out the communication, perception, and computing infrastructure involved in the transmission, transformation, distribution, and use of the distribution network to the users in the substation area, and has intuitive distribution network scenario targeting;

[0051] 2. Clarify the resource classification of each infrastructure after virtualization. In addition to the virtualization of conventional computing, storage, and communication resources, sensor resources in the distribution network should also be included in the virtualization module;

[0052] 3. Introducing a virtualization layer into the architecture, transforming the heterogeneity of hardware facilities and physical interface problems into virtual resource software interface problems, can effectively deal with the problem of distribution network heterogeneity and improve system flexibility;

[0053] 4. At the functional layer, it is proposed to use a similar SBA architecture to realize the intercommunication between the management network element module and the functional network element module between virtual network elements, and partially delegate the VNF management and orchestration functions from the NFV orchestrator to the functional layer, so as to realize the partial management functions between the architecture layers, reduce the complexity of horizontal interaction with the NFV management and orchestration modules, and improve the management efficiency of the functional network element modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a hierarchical architecture diagram of the power telecomputing network for distribution stations based on virtualization technology in the present invention;

[0055] Figure 2 A flowchart of the NFV management and orchestration method of the present invention;

[0056] Figure 3 This is a diagram of the hierarchical architecture of the power communication network in the distribution network area according to an embodiment of the present invention. DETAILED DESCRIPTION

[0057] The present invention proposes a power communication network hierarchical architecture and management arrangement method for distribution station areas, and the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0058] Figure 1This is a hierarchical architecture diagram of the power telecomputing network for distribution stations based on virtualization technology in the present invention, which is mainly divided into four layers and three domains, specifically:

[0059] 1. Three domains: perception domain, communication domain, and computing domain.

[0060] 1) Perception domain. This domain mainly includes perception, sensing equipment and data acquisition equipment in the transmission, transformation, distribution and use of the distribution network to the distribution station area, such as dancing sensors, partial discharge sensors, temperature sensors, FTU terminals, distributed fault indicators, etc. These perception devices cover all aspects of the power grid, such as transmission, distribution, use and user side. By combining with the communication domain, they realize data collection and control interaction of power grid electrical quantities, equipment status quantities, environmental quantities, etc., and have the characteristics of complex business scenarios, diverse technical systems, and a wide range of covered terminals.

[0061] 2) Communication domain. This domain mainly includes access communication technologies for devices in the distribution network perception domain, such as EPON, industrial Ethernet, power line carrier and other technologies to achieve large-scale access to perception devices, providing a basis for realizing distribution automation, electricity consumption information collection and other services; in the power transmission and transformation link, power wireless private network, 4G public network, 5G network, WiFi, LoRa and other technologies are used to realize and apply the Internet of Things of perception devices.

[0062] 3) Computing domain, which mainly includes edge servers and cloud servers responsible for providing computing power. Edge servers are located at the edge of the network, close to where data is generated, and are deployed at the location closest to the data source, such as substations or data collection points in the substation area. Cloud servers are located in cloud computing centers to provide stronger computing and storage capabilities. They are usually distributed and deployed in the grid above the substation area, or deployed separately in larger distribution units.

[0063] 2. Four layers: infrastructure layer - virtualization layer - function layer - application layer

[0064] 1) The infrastructure layer mainly includes the basic hardware facilities in the distribution network, which are horizontally divided into the three modules of communication, perception, and computing mentioned above. On the basis of these three modules, they are further subdivided into various equipment modules. The perception module equipment communicates with the computing module resources through the communication technology within the communication module.

[0065] 2) Virtualization layer, mainly divided into virtualization resource module and virtualization technology module, where the virtualization resource module is the correspondence between hardware resources and virtual resources before and after virtualization by the virtualization layer. The hardware resources before virtualization correspond to the perception hardware accessed by the infrastructure layer through communication technology, the network hardware responsible for communication, and the computing hardware and storage hardware for data processing and storage. After the virtualization layer virtualizes the hardware resources of the infrastructure layer, the corresponding virtual perception, network, computing, and storage resources are obtained, such as virtual perception resources: virtual sensor nodes, virtual sensors, etc.

[0066] The virtualization technology module is mainly the virtualization method of hardware resources adopted by the architecture proposed in the present invention. In full virtualization, the virtual machine monitor (Hypervisor) creates a virtual hardware environment on the physical hardware, and needs to fully simulate the underlying hardware devices, including CPU, memory, clock, I / O devices, interrupts, etc., so that each virtual machine can run a complete operating system instance, and these operating system instances do not need to be modified. In semi-virtualization, the operating system kernel is modified and communicates with the Hypervisor through a set of application programming interfaces (API, Application Programming Interface). Hardware-assisted virtualization is mainly represented by kernel-based virtual machines (KVM, Kernel-based Virtual Machine), which only realizes the virtualization of CPU and memory. CPU instructions can be directly run without translation, which greatly improves the running speed. The virtualization software is responsible for the virtualization of external devices, and KVM is responsible for the virtualization of the underlying execution engine and memory. The two can complement each other. In the architecture proposed in the present invention, hardware-assisted virtualization technology with high efficiency and good performance will be preferentially used to virtualize hardware resources, while full virtualization and semi-virtualization will be used as backup means when hardware facilities fail or are damaged.

[0067] 3) Functional layer

[0068] In the design of the functional layer, the SBA-like architecture is mainly adopted. The functions of the control plane are integrated and unified, and the control plane functions are also decomposed into multiple independent network services. These independent network services can be flexibly combined according to business needs. Each network service is decoupled from other services in terms of business functions, and provides the same type of service-oriented interface to the outside world, providing services to other callers, and converting multiple coupled interfaces into the same type of service-oriented interface, effectively reducing the number of interfaces, unifying the service calling method, and improving the flexibility of the network.

[0069] In this architecture, the policy control function, general data management function, session management function, access and mobility management function and other network element management function modules in the functional layer are divided into part of the architecture management orchestration, and the creation and management of the remaining functional network element functions are jointly controlled by the management network element and the VNF management module.

[0070] 4) Architecture Management and Orchestration

[0071] In the layered architecture of the power sensing and computing network for distribution areas based on virtualization technology proposed by the present invention, the infrastructure layer and the virtualization layer jointly constitute a resource management module, and the hardware resources of the three domains of sensing and computing in the infrastructure layer correspond to network hardware, perception (power distribution) hardware, computing, and storage hardware respectively. The virtualization layer corresponds to the virtual resource module in the resource management module, and the perception resources, computing resources, storage resources, and network resources are hardware resources shared among multiple virtual machines in the form of virtual resources through the virtualization layer. The hardware resources and virtual resources under the same module are divided into layers and jointly accept the resource management module. The VNF module (virtualized network element function module) is the core component for realizing the overall architecture function. It is mainly responsible for providing specific network functions similar to hardware network middleware, corresponding to the network element modules of the functional layer in the architecture of this article. In the NFV management and orchestration function module, the VNF management module is the core module of the management function. This component is mainly responsible for expanding, terminating and updating virtualized network functions. When this component needs to update resources for virtualized network functions, it will interact with the resource management module, and then the resource management module will forward the resource configuration adjustment request to the infrastructure layer and the virtualization layer. The infrastructure layer will make adjustments such as deployment, expansion, and termination of hardware resources according to the updated resource requirements, and the virtualization layer will make adjustments such as allocation and scheduling of virtual resources according to the updated requirements. The VNF management module corresponds to the network element function control module composed of the policy control function, general data management function, access and mobility management function, session management function and other functional modules in this architecture. In addition to being responsible for virtualizing hardware resources using virtualization technology and providing virtual resources to implement VNF, the resource management module is also responsible for checking the connectivity between different VNFs, VNF performance problems or any physical failures. In addition, all other functional modules communicate with the resource management module to meet the infrastructure requirements of the overall architecture. Finally, as another core component of the entire architecture management, the NFV orchestrator can orchestrate and manage the network topology created by the VNF and monitor all resources managed by the infrastructure management module.

[0072] 5) Communication protocol selection under the framework of the present invention

[0073] Under the architecture proposed in the present invention, the power communication protocol and the Internet of Things transmission protocol should be mainly considered. The existing power communication protocols include IEC101 / 104, Modbus, DL / T645 and other protocols. The IEC101 / 104 protocol is generally used in the higher-configured distribution terminals and automation master stations in the architecture, and the Modbus and DL / T645 protocols are generally used in terminal devices with lower distribution.

[0074] The main IoT transmission protocols are MQTT and CoAP. MQTT is a lightweight proxy-based transmission protocol, and its main design concept is simplicity and lightness. The CoAP protocol is based on the REST architecture of the retransmission mechanism, which makes up for the shortcomings of HTTP and meets the needs of resource-constrained devices. Compared with MQTT, the CoAP protocol has a lower deployment cost, and also has good technical characteristics and a reliable transmission mechanism.

[0075] The communication protocol comparison table considered by the architecture proposed by the present invention is shown in Table 1.

[0076] Table 1 Comparison of communication protocols considered in the architecture proposed by the present invention

[0077]

[0078]

[0079] Figure 2 This is a flow chart of the NFV management and orchestration method of the present invention. The management method is mainly aimed at the creation and management of functional network elements in the architecture of the present invention, including two parts: the construction of basic management network element modules and the construction of subsequent functional network element modules. The specific steps include:

[0080] (1) Construction of basic management network element modules

[0081] Step S101: Manage network element creation request

[0082] Before creating a management network element module, the NFV orchestrator needs to send a request to the VNF management module to create a basic management network element module and wait for feedback on whether the module can be created.

[0083] Step S102: Calculate required resources

[0084] After the VNF management module receives the request from the NFV orchestrator, it will calculate the hardware and virtual resources consumed to create the required network element modules based on the request information.

[0085] Step S103: Feedback of estimated resource occupancy results

[0086] After the VNF management module calculates the resource consumption for creation, it will pass the information on whether creation is possible and the calculation results to the NFV orchestrator.

[0087] Step S104: Transmit resource scheduling information

[0088] After the NFV orchestrator receives the network element creation information and resource occupancy estimate from the VNF management module, it passes this information to the resource management module, which schedules the hardware resources and virtual resources in the architecture.

[0089] Steps S105-S108: Resource management module performs resource scheduling

[0090] As described in the first aspect, in the framework of the present invention, the hardware resources and virtual resources are hierarchically divided and managed under the resource management module. In steps S105 to S108, the resource scheduling method between the infrastructure layer and the virtualization layer under the resource management module is mainly completed.

[0091] Step S105: The resource management module transmits the virtual resource information required by the management network element function module to the infrastructure layer.

[0092] Step S106: The infrastructure layer submits corresponding network, computing, and storage resource virtualization requests to the virtualization layer.

[0093] Step S107: the virtualization layer completes the creation of the virtual machine according to the request information.

[0094] Step S108: the virtualization layer directly feeds back the virtual resource allocation result to the resource management module.

[0095] Step S109: The resource management module reports to the NFV orchestrator that the virtual machine has been created.

[0096] Step S110: The NFV orchestrator notifies the VNF management module to create a management network element function module on the created virtual machine.

[0097] Step S111: The VNF management module creates a function layer network element management module on the configured virtual machine.

[0098] Step S112: After creating the function layer network element management module, the VNF management module reports to the NFV orchestrator that the function layer management network element module has been created.

[0099] At this point, the first part of the NFV orchestration method has completed the creation of the functional layer management network element. After that, the functional layer functional network elements are created and managed according to actual needs. Since the management network element carries part of the network element management function, the steps for creating the functional network element are different from those for creating the management network element. The details are as follows:

[0100] (2) Construction of functional network element modules

[0101] Step S113: View the end-to-end topology of the created virtual machine.

[0102] Before creating functional network elements, the NFV orchestrator needs to view the end-to-end topology of the created virtual machines to ensure resource allocation and redundancy reliability.

[0103] Step S114: The NFV orchestrator sends a request to the VNF management module to create a functional network element module.

[0104] Step S115: The VNF management module calculates the resources required to create the functional network element module.

[0105] Step S116: presetting the parameter configurations such as access and session of the newly added functional network element module.

[0106] When creating a functional network element, step S116 specifically refers to the VNF management module receiving the functional network element creation request from the NFV orchestrator, calculating the creation resources, and sending the access, session and other parameter configuration requirements of the newly added network element to the functional layer management network element module to complete the pre-configuration.

[0107] Step S117: The VNF management module feeds back the virtual machine and other computing resource information required to create the functional network element module to the NFV orchestrator.

[0108] Steps S118 to S124 are basically the same as steps S104 to S110 and will not be described in detail.

[0109] Step S125: The VNF management module creates a functional network element module on the newly created virtual machine.

[0110] Step S126: configure management rules such as authentication and data path of the newly created functional network element module.

[0111] In this step, the VNF management module passes the functional network element module creation completion information to the functional layer management network element module, which configures authentication, data path and other management rules for the newly created network elements, and delegates the management function of the VNF management module for the newly created functional network elements to the management network element module.

[0112] Step S127: The VNF management module notifies the NFV orchestrator that the newly added functional network element module of the functional layer has been created.

[0113] Figure 3 This is a diagram of the hierarchical architecture of the power communication computing network in the distribution network substation of the embodiment of the present invention. The following will further illustrate the embodiment of applying this architecture and managing the distribution substation in the distribution network.

[0114] In this embodiment, the infrastructure layer mainly includes the facilities in various links from the distribution station in the distribution area to the household smart meters of the residential users. Referring to the design of the infrastructure layer of the aforementioned architecture, the infrastructure layer facilities are divided into three modules: perception, communication, and computing. The perception module is a low-voltage perception terminal, a terminal monitoring terminal, etc.; the communication module is RS 485, LoRa, power line carrier, etc.; the computing module is the main station / cloud platform.

[0115] In the virtualization layer of the embodiment, the perception module facilities are virtualized into virtual perception and data collection nodes using container technology to achieve faster startup and response speed. The communication and computing modules are virtualized into network, computing, and storage resource modules using hardware-assisted virtualization.

[0116] In the functional layer of the embodiment, the SBA-like architecture form in the proposed architecture design is adopted, and the network element functions can be divided into three modules: perception network elements, computing network elements, and communication network elements. Among them, the network management function and the service orchestration function are management network element functions, and they and the network elements are functional network element functions.

[0117] In the NFV management and orchestration module of the embodiment, the module design is consistent with the proposed architecture design, and is divided into NFV orchestrator, VNF management module, and resource management module. The resource management module manages the virtualization layer and the infrastructure layer; the aforementioned functional layer management network element module carries part of the management and orchestration functions of the VNF management module, and together realizes the management of virtualized network elements; the NFV orchestrator is the core of the entire management module.

[0118] In terms of the communication protocol of the embodiment, referring to the comparative analysis in Table 1, the traditional power communication protocol does not support the self-description function, and still requires point meter configuration. The workload of equipment installation and adjustment is very large, and it cannot meet the needs of substation topology identification based on the power distribution Internet of Things. Unlike the existing power communication protocols, MQTT and CoAP support the device self-description function and meet security requirements, and are suitable for distribution substations. Compared with MQTT, CoAP is more suitable for low-cost and low-performance terminal devices. Therefore, in this example architecture, it is proposed to use the MQTT protocol between the distribution master station and the distribution terminal, and the CoAP protocol between the distribution terminal and the terminal device.

[0119] In the NFV management and orchestration method of the embodiment, the function layer network management function and the service orchestration function are management network element functions that need to be created first when they are created. Figure 2 The basic management network element module construction part of steps S101 to S112 is mainly the creation process of network management function and service orchestration function network element. Figure 2 In the functional network element module construction part, steps S113 to S127 are mainly for the creation of functional network elements such as low voltage sensing function and terminal monitoring function.

[0120] The present invention studies the network architecture of power communication and computing in distribution networks, and proposes a layered network architecture design of power communication and computing based on virtualization technology for distribution substations and a corresponding management and orchestration method, which realizes the reduction of the complexity of horizontal interaction with NFV management and orchestration modules in some management functions between architecture layers, and can improve the management efficiency of functional network element modules.

[0121] The embodiment is only an implementation example of the scenario from a distribution station in a distribution station area to a user's home smart meter, which is only a preferred specific implementation method of the present invention. When designing according to the three-domain, four-layer architecture, it is necessary to pay attention to the specific applicable virtualization methods and the corresponding resource scheduling and management orchestration methods. However, the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A hierarchical architecture of power communication computing network for distribution substations, characterized in that: Includes infrastructure layer, virtualization layer, function layer, and application layer; Among them, the infrastructure layer, virtualization layer, functional layer, and application layer carry out data transmission in sequence; The infrastructure layer includes a sensing unit, a communication unit, and a computing unit; The hardware resources of the virtualization layer include perception hardware, network hardware, computing hardware, and storage hardware; The sensing unit is connected to the sensing hardware, the communication unit is connected to the network hardware, and the computing hardware and the storage hardware are respectively connected to the computing unit; The functional layer includes a virtual network slice selection function, a virtual network storage function, a virtual network capability exposure function, an application function, a policy control function, a general data management function, an authentication service function, a service communication proxy function, an access and mobility management function, and a session management function; The application layer includes equipment operation monitoring, automatic topology identification, distributed energy management, load forecasting and optimization, and power quality management.

2. According to claim 1, the hierarchical architecture of the power communication network for distribution stations is characterized in that: The sensing unit, communication unit, and computing unit perform data transmission in sequence.

3. The hierarchical architecture of the power communication network for distribution substations according to claim 2 is characterized in that: The sensing unit includes a dancing sensor, a smart meter, a partial discharge sensor, a temperature sensor, an FTU terminal, a distributed fault indicator, a video monitor, a metering box, and a data collector.

4. The power communication network hierarchical architecture for distribution substations according to claim 2 or 3 is characterized in that: The communication protocols of the communication unit include ZigBee, RS485, LoRa, Ethernet, EPON, WiFi, RS232, and HPLC.

5. The hierarchical architecture of the power communication network for distribution substations according to claim 2 is characterized in that: The computing unit includes an edge base station and a cloud server.

6. The hierarchical architecture of the power communication network for distribution substations according to claim 1 is characterized in that: The virtualized resources obtained after the hardware resources of the virtualization layer are virtualized include: virtual sensor nodes, TAP / TUN, virtual CPU, virtual machine disk, virtual sensor, virtual switch, virtual memory, virtual hard disk; The virtualized resources have virtual network slice selection function, virtual network storage function, and virtual network capability opening function.

7. The power communication network hierarchical architecture for distribution substations according to claim 1 or 6, characterized in that: The functional layer also includes a user terminal, a wireless access network, a user plane function, and a data network; wherein the user terminal and the wireless access network are connected to the mobility management function through the N1 interface and the N2 interface respectively; the user terminal is connected to the wireless access network; the wireless access network is connected to the user plane function through the N3 interface; the user plane function is connected to the user plane function, the session management function, and the data network through the N9 interface, the N4 interface, and the N6 interface respectively; The virtual network slice selection function accesses the bus through Nvnssf, the virtual network storage function accesses the bus through Nvnre, the virtual network capability exposure function accesses the bus through Nvnef, the application function accesses the bus through Naf, the policy control function accesses the bus through Npcf, the general data management function accesses the bus through Nudm, the authentication service function accesses the bus through Nausf, the service communication agent function accesses the bus, the access and mobility management function accesses the bus through Namf, and the session management function accesses the bus through Nsmf.

8. A method for managing and arranging a hierarchical architecture of a power communication network for distribution substations as claimed in claim 7, characterized in that: The following steps are involved: Step S101: before creating a management network element module, the NFV orchestrator sends a request to the VNF management module to create a basic management network element module and waits for feedback information on whether the module can be created; Step S102: After the VNF management module receives the request sent by the NFV orchestrator, it calculates the hardware and virtual resources consumed by creating the required network element module according to the sent request information; Step S103: After the VNF management module calculates the creation resource consumption, it transmits the information of whether the creation can be done and the calculation result to the NFV orchestrator; Step S104: After the NFV orchestrator receives the network element creation information and resource occupancy estimate fed back by the VNF management module, the NFV orchestrator transmits this information to the resource management module; Step S105: The resource management module transmits virtual resource information required by the management network element function module to the infrastructure layer; Step S106: The infrastructure layer submits corresponding network, computing, and storage resource virtualization requests to the virtualization layer; Step S107: the virtualization layer creates a virtual machine according to the request information; Step S108: the virtualization layer directly feeds back the virtual resource allocation result to the resource management module; Step S109: The resource management module reports to the NFV orchestrator that the virtual machine has been created; Step S110: The NFV orchestrator notifies the VNF management module to create a management network element function module on the created virtual machine; Step S111: The VNF management module creates a function layer network element management module on the configured virtual machine; Step S112: After creating the function layer network element management module, the VNF management module reports to the NFV orchestrator that the function layer management network element module has been created; Step S113: Check the end-to-end topology of the created virtual machine; Step S114: The NFV orchestrator sends a request to create a functional network element module to the VNF management module; Step S115: The VNF management module calculates the resources required to create the functional network element module; Step S116: presetting the parameter configurations such as access and session of the newly added functional network element module; Step S117: The VNF management module feeds back the virtual machine and computing resource information required to create the functional network element module to the NFV orchestrator; Step S118: After the NFV orchestrator receives the network element creation information and resource occupancy estimate fed back by the VNF management module, the NFV orchestrator transmits this information to the resource management module; Step S119: the resource management module transmits the virtual resource information required by the management network element function module to the infrastructure layer; Step S120: The infrastructure layer submits corresponding network, computing, and storage resource virtualization requests to the virtualization layer; Step S121: the virtualization layer creates a virtual machine according to the request information; Step S122: the virtualization layer directly feeds back the virtual resource allocation result to the resource management module; Step S123: The resource management module reports to the NFV orchestrator that the virtual machine has been created; Step S124: the NFV orchestrator notifies the VNF management module to create a management network element function module on the created virtual machine; Step S125: The VNF management module creates a functional network element module on the newly created virtual machine; Step S126: The VNF management module transmits the functional network element module creation completion information to the functional layer management network element module, and the functional layer management network element module configures the authentication and data path management rules for the newly created network element, and delegates the management function of the VNF management module for the newly created functional network element to the management network element module; Step S127: The VNF management module notifies the NFV orchestrator functional layer that the newly added functional network element module has been created.

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