Method and system for dynamically reconstructing diversified network topology based on virtuality and reality combination technology

Abstract

The invention discloses a virtuality and reality combined method and system for dynamically reconstructing diversified network topology, and belongs to the technical field of novel power systems, and the method comprises the following steps: virtualizing physical equipment in a power system business scene network by using NFV to obtain virtual equipment; constructing a network architecture for realizing a service scene network of the power system by adopting a virtualization mode; physical equipment and virtual equipment in the service scene network of the power system are controlled in a centralized manner based on the SDN; and the SDN controller dynamically reconstructs the service scene network of the power system according to a set strategy. According to the invention, dynamic allocation of network resources and real-time reconstruction of topology are realized through a virtuality and reality combination technology, a software defined network technology and a network function virtualization technology, and virtualized resources and resources of physical equipment can be effectively integrated so as to quickly respond to changes of application requirements.

Description

Technical Field

[0001] The present invention belongs to the technical field of novel power systems, and more specifically, relates to a method and system for dynamically reconstructing diversified network topologies using virtual-real combined technology. Background Art

[0002] With the surge in the number of intelligent devices in the power system, the diversification of device types and communication requirements, traditional hardware devices and topologies are difficult to flexibly respond to rapidly changing environmental requirements. Especially in some scenarios with high latency and bandwidth requirements, fixed topologies cannot be flexibly adjusted, which can easily lead to network congestion, transmission delays and resource waste. Traditional network topology construction methods cannot effectively integrate the advantages of virtualized resources and physical devices, resulting in insufficient flexibility and adaptability of network topology. Virtual devices usually play an important role in simulation and experimental environments, but in actual production networks, due to the difficulty of resource configuration and management, the integration of virtual and physical devices is insufficient, which limits the network's scalability, fault tolerance and optimization and adjustment capabilities.

[0003] Therefore, in order to solve the problem that the power grid system cannot flexibly adjust the network topology and cannot well realize the integration and scheduling of virtualized resources and physical equipment resources, the present invention innovatively proposes a method for dynamically reconstructing diversified network topologies by combining virtual and real technologies. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a method and system for dynamically reconstructing diversified network topologies by combining virtual and real technologies. By combining virtual and real technologies, software defined network technology (SDN) and network function virtualization (NFV) technologies, dynamic allocation of network resources and real-time reconstruction of topology are realized, and virtualized resources and physical device resources can be effectively integrated to quickly respond to changes in application requirements.

[0005] The present invention adopts the following technical solution. The first aspect of the present invention provides a method for dynamically reconstructing a diversified network topology by combining virtual and real, comprising the following steps:

[0006] Use NFV to virtualize physical devices in the power system business scenario network to obtain virtual devices;

[0007] Use virtualization to build a network architecture that implements the power system business scenario network;

[0008] Centrally control physical and virtual devices in the power system business scenario network based on SDN;

[0009] The SDN controller dynamically reconstructs the power system business scenario network according to the set strategy.

[0010] Preferably, using NFV to virtualize physical devices in the power system business scenario network includes:

[0011] Deploy NFV virtualization platform to provide virtual machine and container operating environment for network function virtualization;

[0012] Select and design the physical network functions that need to be virtualized, convert physical devices into virtual devices, and deploy and instantiate VNF instances on the NFV virtualization platform;

[0013] The different levels of the network hierarchy where the corresponding physical devices are located and the different segments of the network determine the different deployment locations of the virtual physical devices and build the target range components.

[0014] Preferably, the network architecture is constructed and implemented in a virtualized manner including:

[0015] Determine the business scenarios of the target range and build the network topology for the business scenarios;

[0016] Use the orchestration platform of the NFV virtualization platform to manage virtualized network functions, build a virtual-real hybrid network topology, and achieve seamless integration of virtual and physical devices.

[0017] Preferably, several typical network topology demos are pre-implanted, including star, tree, and hybrid, for customized operations based on the demos, and for establishing virtualized scenarios with draggable topology tools.

[0018] Preferably, the physical devices and virtual devices in the SDN-based centralized control of the power system business scenario network include:

[0019] Build an SDN control architecture and configure the types of devices that require centralized control;

[0020] Deploy SDN controller according to the constructed SDN control architecture;

[0021] Configure and connect virtual and physical devices;

[0022] Define network traffic control and policies in the SDN controller.

[0023] Preferably, configuring and connecting the virtual device and the physical device includes:

[0024] Physical devices and virtual devices are included in the centralized management of the SDN controller. Through the set protocol, switches and routers are connected to the SDN controller to configure the physical devices, and the communication method between the SDN controller and the physical devices is configured; the API of the NFV virtualization platform is used to integrate the virtual devices with the SDN controller.

[0025] Preferably, defining network traffic control and policies in the SDN controller includes:

[0026] Configure flow table rules in the SDN controller, define traffic processing rules for physical and virtual devices, configure different routing paths based on traffic type, destination address, and bandwidth requirements, define firewall rules at the SDN controller level, control traffic access between virtual and real devices, and use the SDN controller to centrally manage network bandwidth resources.

[0027] Preferably, the SDN controller implements dynamic reconstruction of the power system business scenario network according to the set strategy, including:

[0028] When the network load is high, the SDN controller can transfer data that should be scheduled to the virtual device to the physical device to improve processing capacity;

[0029] When the network load is low, SDN can dispatch traffic to virtual devices to reduce hardware costs;

[0030] Dynamically reconfigure network topology as network load performance changes.

[0031] Preferably, in the attack simulation and defense verification scenario: virtual devices simulate attack sources, victim hosts or attack traffic, and physical devices are used to simulate key network components to ensure the authenticity of attack and defense confrontation;

[0032] In load balancing and traffic forwarding scenarios: By exchanging virtual and real nodes, the performance differences between virtual devices and physical devices are tested respectively. By mixing virtual and physical devices, the performance changes of the network under different network loads and traffic forwarding strategies are tested.

[0033] In the multi-level security protection test scenario: virtual devices are used to create virtual network segments, and physical devices are deployed at the boundaries of network segments to perform network segmentation and isolation tests to evaluate the security and attack propagation paths under different network segments; virtual devices are used to simulate internal network traffic, and physical firewalls are used to perform traffic filtering and isolation tests to ensure that the firewall configuration can effectively isolate traffic in different areas, avoiding internal and external network data leakage and cross-regional attacks;

[0034] In high availability and disaster recovery test scenarios: When building a network topology with high availability, the combination of virtual and physical devices tests the system's ability to respond to device failures; virtual devices are used to simulate the disaster recovery process, and physical devices are used to detect the recovery of network services after network disconnection, device failure, or network attack.

[0035] The second aspect of the present invention provides a system for dynamically reconstructing a diversified network topology by combining virtual and real elements, and a method for dynamically reconstructing a diversified network topology by combining virtual and real elements, comprising:

[0036] NFV virtualization platform, which is used to provide virtual machine and container operating environment, virtualize physical devices in the power system business scenario network, and obtain virtual devices;

[0037] Drag-and-drop topology tools for building virtualized scenarios and implementing network architecture for power system business scenario networks;

[0038] The SDN controller is used to centrally control the physical and virtual devices in the power system business scenario network and dynamically reconstruct the power system business scenario network according to the set strategies.

[0039] Compared with the prior art, the beneficial effects of the present invention include at least:

[0040] 1. Flexible virtual and real device interchangeability

[0041] Through NFV, virtual devices and physical devices can coexist in the same network topology and can be dynamically switched according to scenarios such as network load, traffic demand, and fault recovery.

[0042] The centralized control capability of SDN can monitor traffic and load conditions in real time, automatically select virtual devices or physical devices in the network topology as nodes for traffic forwarding, and achieve seamless switching between virtual and real devices.

[0043] 2. Dynamic reconstruction and real-time network topology adjustment

[0044] The SDN controller can monitor traffic and other data in real time and automatically reconstruct the network topology.

[0045] NFV can quickly deploy and migrate virtual devices.

[0046] By combining SDN with NFV, network topology reconstruction can be performed automatically based on business needs, traffic fluctuations, and fault recovery without manual intervention, thereby improving the network's response speed and flexibility.

[0047] 3. Improve resource utilization and network performance

[0048] NFV technology can flexibly allocate and adjust network resources, dynamically enable or release network functions according to demand, and avoid resource waste caused by idle equipment in traditional networks.

[0049] Through SDN's dynamic traffic scheduling, path selection can be optimized in real time to achieve flexible switching of physical and virtual devices. When a network bottleneck occurs, SDN can intelligently schedule traffic to devices with lower loads.

[0050] 4. Enhance network resilience and fault tolerance

[0051] When a physical device in the network fails, the SDN controller can immediately adjust the traffic path and switch to other devices or virtual nodes to ensure that the network is not affected.

[0052] The NFV platform supports dynamic migration of network functions. Even if a virtual node fails, SDN can instruct the controller to automatically direct traffic to a backup virtual node or physical device, greatly enhancing the fault tolerance of the network. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a principle diagram of a method for dynamically reconstructing a diversified network topology by combining virtuality and reality provided in accordance with an embodiment of the present invention;

[0054] Figure 2 is a schematic diagram of a NFV virtualized physical device provided according to an embodiment of the present invention;

[0055] Figure 3 It is a schematic diagram of SDN configuration and deployment provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0057] like Figures 1 to 3 As shown, embodiment 1 of the present invention provides a method for dynamically reconstructing a diversified network topology by combining virtual and real, comprising the following steps:

[0058] Step 1: Use NFV (Network Functions Virtualization) to virtualize the physical devices in the power system business scenario network to obtain virtual devices.

[0059] Preferably but not limiting, step 1 specifically comprises:

[0060] Step 1.1: Deploy the NFV virtualization platform and establish an infrastructure that supports virtualization functions. The infrastructure provides a virtual machine and container operating environment and supports the virtualization of network functions. With the help of the NFV virtualization platform, the functions of physical devices such as routers, switches, and isolation devices are converted into virtual device functions. By determining the exchange strategy between virtual devices and physical devices, virtual and real devices are effectively combined to maximize the utilization of network resources.

[0061] Install and configure the NFV virtualization platform in a general-purpose server or data center, and ensure that the NFV virtualization platform can support high-performance network function virtualization. Plan the allocation of virtualization resources, including computing power, storage resources, and network bandwidth, based on business needs and performance requirements to ensure that the virtualization functions of physical devices can run smoothly.

[0062] Step 1.2: Select and design the physical network functions that need to be virtualized, convert physical devices such as routers, firewalls, switches, and terminals into virtual devices, and deploy and instantiate VNF instances (Virtual Network Functions) on the NFV virtualization platform.

[0063] Each VNF instance acts as an independent virtual device with the same functions as a physical device, but runs in a virtualized environment. The network functions of the virtual device are configured and tested to ensure that the performance is consistent with that of the physical device.

[0064] For power systems, network functions such as throughput, latency, and fault tolerance are all important standards worth referring to. NFV in power systems can abstract network functions from dedicated hardware, implement these functions in a virtualized environment, deploy and run them in the form of software, and achieve flexible deployment and management of functions, thereby improving the flexibility, scalability, and manageability of the network. It breaks through the limitations of hardware dependence in the traditional network architecture of the power system, allowing network functions to be dynamically configured, migrated, and expanded in a software-based manner.

[0065] Step 1.3: Determine the different deployment locations of virtual physical devices according to the different levels of the network hierarchy and different segments of the network where the corresponding physical devices are located, and build the target range components.

[0066] By planning the virtual network segments in the network, you can configure the flow table on the SDN controller in the subsequent steps to plan the flow path of traffic in the network topology. Virtualize the devices in the virtualization platform and pool them, allocate devices on demand, configure the mapping relationship between physical resources and virtual resources, and ensure that physical resources can be flexibly allocated to the virtualized environment.

[0067] This step is the key foundation for the target range to achieve switching between virtual and real devices and real-time reconstruction of network topology. It requires the construction of target range components. Compared with physical equipment, target range components have the advantages of lower price and easier storage and maintenance.

[0068] Step 2: Use virtualization to build a network architecture that implements the power system business scenario network.

[0069] Preferably but not limiting, step 2 specifically comprises:

[0070] Step 2.1: Determine the business scenarios of the target range and build the business scenario network topology.

[0071] Determine the business scenarios of the target range. According to business scenarios such as attack and defense test scenarios, performance verification scenarios, equipment compatibility test scenarios, or multi-scenario drills, the constructed virtual components of the target range are layered according to different network layers. The virtual switches, routers, terminals, etc. are divided according to the network to construct the network topology.

[0072] In actual business scenarios, in order to reduce costs and enhance network flexibility, it is necessary to virtualize physical devices such as switches, routers, and isolation devices. By building draggable topology tools and establishing virtualization scenarios, physical devices or virtualized devices can be reasonably arranged in different business scenarios to ensure performance or flexibility. Therefore, according to the needs of different scenarios, users can build a set of business scenario topologies on demand, such as network topologies for security testing, attack simulation, and attack and defense confrontation scenarios.

[0073] The present invention will pre-implant several typical networking topology demos, such as star, tree, and hybrid, so that users can perform customized operations based on the demos.

[0074] Step 2.2: Network orchestration and management, including: Using the orchestration platform of the NFV virtualization platform to manage virtualized network functions. The NFV virtualization platform automatically deploys, monitors, manages, and optimizes VNF instances.

[0075] Use the NFV virtualization platform to build a virtual-real hybrid network topology and achieve seamless integration of virtual and physical devices, so that the network can be adaptively adjusted according to needs in different scenarios; through NFV, different types of devices can be mixed and work together in the same network to maximize the utilization of devices and resources.

[0076] Step 3: Centrally control the physical and virtual devices in the power system business scenario network based on SDN.

[0077] Preferably but not limiting, step 3 specifically comprises:

[0078] Step 3.1: Build the SDN control architecture, including: selecting the appropriate SDN control architecture based on the network scale, number of devices and requirements, confirming the types of devices that need to be centrally controlled and the control requirements, and ensuring that the existing virtualization platform, physical devices and network protocols are compatible with the SDN controller.

[0079] Device types include, but are not limited to, virtual devices and physical devices, and control requirements include, but are not limited to, traffic management, security control, bandwidth allocation, etc.

[0080] Step 3.2: Deploy the SDN controller based on the constructed SDN control architecture.

[0081] The SDN controller platform is the "brain" for building the network topology in the present invention, responsible for centralized management and configuration of virtual and physical devices. According to the network requirements of different business scenarios in the first step, a suitable SDN controller platform is selected. The SDN controller platform needs to have sufficient computing resources and network connections, be able to process the status information of network devices in real time, and issue control instructions.

[0082] After the network architecture design is completed, the SDN controller is deployed. After the interfaces of the virtual simulation devices and physical devices are connected to the SDN controller, the control functions of the network are centralized on the SDN controller to achieve unified management of network traffic, topology, and device configuration. At the same time, the flow table and policy are configured in the SDN controller, the flow path of the traffic in the network topology is set, and the traffic forwarding path is defined.

[0083] It is worth noting that the flow table in the SDN controller is a bridge between the control plane and the data plane, instructing devices on how to forward, modify or discard data packets. By controlling the flow table, the SDN controller can flexibly schedule traffic between virtual devices and physical devices, support different types of network topologies, and dynamically switch traffic from virtual nodes to physical nodes, or vice versa, as needed.

[0084] Step 3.3: Configure and connect virtual and real devices.

[0085] Through the deployed SDN controller, physical devices and virtual devices can be brought under centralized management. Physical devices such as switches and routers can be connected to the SDN controller through protocols such as OpenFlow, NETCONF, and REST API to configure physical devices and configure the communication method between the SDN controller and physical devices. By deploying virtual switches, virtual routers, virtual terminals, etc. in the NFV virtualization platform, they can be managed through the SDN controller, and the virtual devices can be integrated with the SDN controller using the API of the virtualization platform to ensure that the virtual devices can be configured and managed through the controller.

[0086] Deploy an SDN controller between the virtual environment and the physical network so that virtual devices and physical devices can be interconnected, test cross-layer and cross-domain network security defense, and enable virtual and real devices to be centrally controlled by the SDN controller for traffic and network load.

[0087] Step 3.4: Define network traffic control and policies in the SDN controller.

[0088] Traffic control and policy management are key tasks in SDN controllers. SDN controllers adjust traffic routing according to policies and network status to ensure network efficiency and security, configure flow table rules in SDN controllers, define traffic processing rules for physical and virtual devices, configure different routing paths according to traffic type, destination address, bandwidth requirements, etc., define firewall rules at the controller level, control traffic access between virtual and real devices, use SDN controllers to centrally manage network bandwidth resources, prioritize important traffic, and ensure service quality.

[0089] Step 4: The SDN controller dynamically reconfigures the power system business scenario network according to the set strategy.

[0090] Preferably, but not restrictively, when the network load is high, the SDN controller can transfer the data that should be scheduled to the virtual device to the physical device to improve the processing capacity; when the network load is low, the SDN can schedule the traffic to the virtual device to reduce the hardware cost. Dynamic reconstruction of the network topology is achieved in the performance change of the network load.

[0091] The SDN controller can flexibly combine and schedule virtual devices and physical devices according to the needs of specific scenarios. By dynamically scheduling virtual devices and physical devices, the network topology can be guaranteed to support diverse needs.

[0092] Further preferably but not restrictively, based on SDN dynamic virtual and real devices, including: the SDN controller dynamically manages the connection between virtual devices and physical devices, so it makes judgments based on the communication conditions between the devices and the controller, dynamically adjusts network traffic based on load requirements, and forwards part of the traffic from the virtual switch to the physical switch, or from the physical router to the virtual router.

[0093] Further preferably but not restrictively, the real-time exchange of virtual and real device nodes based on SDN includes: when a network failure, attack or high load occurs, the SDN controller automatically forwards the traffic to the backup virtual or physical node to ensure the high availability of the network. During dynamic switching, the SDN controller can update the flow table in real time to maintain the continuity and consistency of the data flow.

[0094] Further preferably but not restrictively, the dynamic reconstruction and virtual-real node interchange based on NFV include: through the automated deployment and elastic scaling mechanism of NFV, virtual devices and physical devices can be dynamically interchanged or reconfigured to cope with the ever-changing network needs. In scenarios such as high traffic demand, fault recovery, and load balancing, the NFV platform can automatically choose to switch virtual devices to physical devices, or switch traffic to other virtual devices when a physical device fails. SDN provides a centralized control plane that can perform real-time and flexible control of all devices and traffic in the network. When combined with NFV, virtual devices (VNFs) can be flexibly deployed and adjusted under the instructions of the SDN controller, while NFV ensures the virtualization and rapid elastic scaling of network functions; the dynamic traffic control of SDN cooperates with the elastic resource scheduling of NFV, so that the switching and reconstruction between virtual devices and physical devices can be carried out automatically without human intervention.

[0095] It is worth noting that the present invention innovatively uses SDN to start from the real-time switching of physical nodes and virtual nodes. The advantages of physical nodes are strong processing capabilities and fast response speed, but the disadvantages are that in real scenarios, the maintenance cost of physical nodes is high, and they are not easy to move, and the networking form is single; while virtual nodes have a slower response speed and stability is limited by the network, but they have low maintenance costs, flexible networking, and are easy to deploy quickly. Through SDN technology, physical devices and virtual device resources are dynamically integrated to achieve seamless coordination and dynamic reconstruction of network topology.

[0096] It is worth noting that the present invention meets the real-time requirements of dynamic reconstruction of network topology. The SDN controller receives the device status information and current network status in real time. The controller can timely adjust the device access status and draw the topology map by calculating the traffic path, and send the new flow table to the relevant devices. When the network load is too high, the SDN controller instructs the NFV platform to migrate part of the traffic load of the physical device to other virtual nodes, and vice versa.

[0097] The application fields of the present invention include at least:

[0098] Attack simulation and defense verification: In attack and defense drills, the hybrid networking method of virtual and real devices is often used to build a diverse test environment. Virtual devices can simulate a large number of attack sources, victim hosts or attack traffic, while physical devices are used to simulate key network components (such as firewalls, intrusion detection systems, etc.) to ensure the authenticity of attack and defense confrontation; by combining virtual nodes with physical devices, large-scale attack and defense confrontation experiments can be carried out at a lower cost.

[0099] Load balancing and traffic forwarding: By interchanging virtual and real nodes, researchers can test the performance differences between virtual devices and physical devices respectively. By mixing virtual and physical devices, they can test the performance changes of the network under different network loads and traffic forwarding strategies.

[0100] Multi-level security protection test: Virtual devices can be used to create virtual network segments, while physical devices can be deployed at the boundaries of these network segments to perform network segmentation and isolation tests. By combining virtualization with physical devices, the security and attack propagation paths under different network segments can be evaluated. Virtual devices can be used to simulate internal network traffic, and physical firewalls can be used for traffic filtering and isolation testing to ensure that the firewall configuration can effectively isolate traffic in different areas, avoid internal and external network data leakage and cross-regional attacks.

[0101] High availability and disaster recovery testing: When building a network topology with high availability, the combination of virtual and physical devices can test the system's ability to respond to device failures; virtual devices can be used to simulate the disaster recovery process to detect how to restore network services through physical devices after network disconnection, device failure, or network attack. Mixed device configuration can effectively evaluate the fault tolerance and recovery capabilities of the network.

[0102] Embodiment 2 of the present invention provides a system for dynamically reconstructing a diversified network topology by combining virtual and real elements, and the method for dynamically reconstructing a diversified network topology by combining virtual and real elements described in Embodiment 1 includes:

[0103] NFV virtualization platform, which is used to provide virtual machine and container operating environment, virtualize physical devices in the power system business scenario network, and obtain virtual devices;

[0104] Drag-and-drop topology tools for building virtualized scenarios and implementing network architecture for power system business scenario networks;

[0105] The SDN configuration platform is used to centrally control the physical and virtual devices in the power system business scenario network, and dynamically reconstruct the power system business scenario network according to the set strategies.

[0106] Embodiment 3 of the present invention provides an electronic device, comprising 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 method for dynamically reconstructing a diversified network topology combining virtual and real elements according to Embodiment 1 is implemented.

[0107] Embodiment 4 of the present invention provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the method for dynamically reconstructing a diversified network topology by combining virtual and real elements according to Embodiment 1 is implemented.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for dynamically reconstructing diversified network topology by combining virtual and real, characterized in that: The following steps are involved: Use NFV to virtualize physical devices in the power system business scenario network to obtain virtual devices; Use virtualization to build a network architecture that implements the power system business scenario network; Centrally control physical and virtual devices in the power system business scenario network based on SDN; The SDN controller dynamically reconstructs the power system business scenario network according to the set strategy.

2. According to claim 1, a method for dynamically reconstructing a diversified network topology by combining virtual and real elements, characterized in that: Using NFV to virtualize physical devices in the power system business scenario network includes: Deploy NFV virtualization platform to provide virtual machine and container operating environment for network function virtualization; Select and design physical network functions that need to be virtualized, convert physical devices into virtual devices, and deploy and instantiate VNF instances on the NFV virtualization platform; The different levels of the network hierarchy where the corresponding physical devices are located and the different segments of the network determine the different deployment locations of the virtual physical devices and build the target range components.

3. According to claim 1, a method for dynamically reconstructing a diversified network topology by combining virtual and real, characterized in that: The network architecture implemented by virtualization includes: Determine the business scenarios of the target range and build the network topology for the business scenarios; Use the orchestration platform of the NFV virtualization platform to manage virtualized network functions, build a virtual-real hybrid network topology, and achieve seamless integration of virtual and physical devices.

4. The method for dynamically reconstructing a diversified network topology by combining virtual and real elements according to claim 3, characterized in that: Several typical network topology demos are pre-implanted, including star, tree, and hybrid. They are used to perform customized operations based on the demos and to establish virtualized scenarios with draggable topology tools.

5. The method for dynamically reconstructing a diversified network topology by combining virtual and real elements according to claim 1, characterized in that: The physical and virtual devices in the network of the SDN-based centralized control power system business scenario include: Build an SDN control architecture and configure the types of devices that require centralized control; Deploy SDN controller according to the constructed SDN control architecture; Configure and connect virtual and physical devices; Define network traffic control and policies in the SDN controller.

6. The method for dynamically reconstructing a diversified network topology by combining virtual and real elements according to claim 5, characterized in that: Configuring and connecting virtual and physical devices includes: Physical devices and virtual devices are included in the centralized management of the SDN controller. Through the set protocol, switches and routers are connected to the SDN controller to configure the physical devices, and the communication method between the SDN controller and the physical devices is configured; the API of the NFV virtualization platform is used to integrate the virtual devices with the SDN controller.

7. The method for dynamically reconstructing a diversified network topology by combining virtual and real elements according to claim 5, characterized in that: Defining network traffic control and policies in the SDN controller includes: Configure flow table rules in the SDN controller, define traffic processing rules for physical and virtual devices, configure different routing paths based on traffic type, destination address, and bandwidth requirements, define firewall rules at the SDN controller level, control traffic access between virtual and real devices, and use the SDN controller to centrally manage network bandwidth resources.

8. The method for dynamically reconstructing a diversified network topology by combining virtual and real elements according to claim 7, characterized in that: The SDN controller dynamically reconfigures the power system business scenario network according to the set strategy, including: When the network load is high, the SDN controller can transfer data that should be scheduled to the virtual device to the physical device to improve processing capacity; When the network load is low, SDN can dispatch traffic to virtual devices to reduce hardware costs; Dynamically reconfigure network topology as network load performance changes. During dynamic switching, the SDN controller updates the flow table in real time to maintain the continuity and consistency of the data flow.

9. A method for dynamically reconstructing a diversified network topology by combining virtual and real elements according to any one of claims 1 to 9, characterized in that: In attack simulation and defense verification scenarios: virtual devices simulate attack sources, victim hosts, or attack traffic, and physical devices are used to simulate key network components to ensure the authenticity of attack and defense confrontation; In load balancing and traffic forwarding scenarios: By exchanging virtual and real nodes, the performance differences between virtual devices and physical devices are tested respectively. By mixing virtual and physical devices, the performance changes of the network under different network loads and traffic forwarding strategies are tested. In the multi-level security protection test scenario: virtual devices are used to create virtual network segments, and physical devices are deployed at the boundaries of network segments to perform network segmentation and isolation tests to evaluate the security and attack propagation paths under different network segments; virtual devices are used to simulate internal network traffic, and physical firewalls are used to perform traffic filtering and isolation tests to ensure that the firewall configuration can effectively isolate traffic in different areas, avoiding internal and external network data leakage and cross-regional attacks; In high availability and disaster recovery test scenarios: When building a network topology with high availability, the combination of virtual and physical devices tests the system's ability to respond to device failures; virtual devices are used to simulate the disaster recovery process, and physical devices are used to detect the recovery of network services after network disconnection, device failure, or network attack.

10. A system for dynamically reconstructing a diversified network topology by combining virtual and real elements, running a method for dynamically reconstructing a diversified network topology by combining virtual and real elements according to any one of claims 1 to 9, characterized in that: include: NFV virtualization platform, which is used to provide virtual machine and container operating environment, virtualize physical devices in the power system business scenario network, and obtain virtual devices; Drag-and-drop topology tools for building virtualized scenarios and implementing network architecture for power system business scenario networks; The SDN controller is used to centrally control the physical and virtual devices in the power system business scenario network and dynamically reconstruct the power system business scenario network according to the set strategies.

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