Flexible and expandable substation network control system and method

Abstract

The invention relates to the field of power system network architecture, in particular to a flexible and expandable transformer substation network control system and method.The system comprises a sensing layer, a network layer and an application layer, and the sensing layer comprises transformer substation sensing equipment used for obtaining service data of a transformer substation; the network layer comprises a fusion terminal and a switch, the fusion terminal comprises at least one output virtual terminal, the switch is provided with at least one input virtual terminal, the output virtual terminals of the fusion terminal and the input virtual terminals on the switch are connected in a one-to-one correspondence mode to form transmission channels, and the fusion terminal is used for carrying out classification and priority ranking on service data; transmitting the classified and sorted service data to a switch through a corresponding transmission channel; the application layer comprises supervision equipment, a plurality of different transmission channels are formed through virtual terminal connection, classified and sorted data are forwarded respectively, and forwarding efficiency and expansibility are improved.

Description

Technical Field

[0001] The present invention relates to the field of power system network architecture, and in particular to a flexible and expandable substation network control system and method. Background Art

[0002] With the continuous advancement of intelligent substation construction and digital transformation, the demand for substation equipment applications is growing. However, the equipment and data transmission systems in substation network architectures face challenges such as insufficient information sharing, data transmission congestion, and inflexible node device adjustments. Traditional architectures, rooted in static, fixed network designs, rigid data transmission paths between devices, unable to dynamically adjust to actual business needs. They primarily rely on statically divided service subnets and fail to fully consider the differentiated needs of different power data types (such as measurement and control, metering, protection, and condition monitoring), resulting in a lack of flexibility and scalability at the network level. Furthermore, traditional substation network architectures are highly coupled between power hardware devices. Failure of some node devices in the network architecture disrupts data forwarding, paralyzing the entire substation network and preventing flexible device deployment and isolation. Traditional substation architectures lack dynamic adjustment and adaptability, preventing rapid data path reconstruction upon failure. This results in long recovery times and poor implementation of adaptive network topology real-time adjustment strategies, leading to limited scalability of substation IoT networks. Therefore, developing a flexible and scalable substation network architecture is of great practical significance.

[0003] Existing technologies for improving the scalability and flexibility of substation networks are primarily achieved by dividing substation business subnets. However, existing substation network architectures based on business subnets lack an effective separation design for protection services and measurement, control, and metering services. Key business data cannot be transmitted with priority, and the network's recovery capabilities cannot be effectively improved in fault scenarios. Node congestion and business backlogs exist in network-layer sensor devices, resulting in insufficient scalability of the substation network structure. Therefore, how to improve the scalability of wireless sensing while further reducing transmission latency has become one of the key issues that need to be addressed. Regarding the flexibility of wireless sensor networks, the existing business subnet division scheme, when applied to substation network architectures, fails in the event of a specific business subnet failure due to the lack of a flexible routing and forwarding strategy. Therefore, there is an urgent need to break through the limitations of static design and fixed paths and propose a new network architecture that supports dynamic routing, business priority scheduling, and fault self-recovery. Summary of the Invention

[0004] In order to solve the problems of data congestion, extended transmission time and inflexible expansion of node devices in the existing technology, the first aspect of the present invention proposes a flexible and scalable substation network control system, including a perception layer, a network layer and an application layer, wherein:

[0005] The perception layer includes a substation perception device, which is used to obtain business data of the substation;

[0006] The network layer includes a converged terminal and a switch. The converged terminal includes at least one output virtual terminal. The switch is provided with at least one input virtual terminal. The output virtual terminals of the converged terminal are connected to the input virtual terminals on the switch in a one-to-one correspondence to form a transmission channel. The converged terminal is used to classify and prioritize the service data, and transmit the classified and prioritized service data to the switch through the corresponding transmission channel.

[0007] The application layer includes a monitoring device, which is used to receive business data of the switch and monitor and manage the devices of the network layer and the perception layer based on the business data.

[0008] Preferably, the network layer also includes a narrowband wireless access node and a broadband wireless access node, the narrowband device in the substation sensing device is connected to the fusion terminal through the narrowband wireless access node; the broadband device in the substation sensing device is connected to the fusion terminal through the broadband wireless access node; the wired sensing device in the substation sensing device is directly connected to the fusion terminal.

[0009] Preferably, the network layer also includes a security access gateway, the input end of which is connected to the output end of the switch, and is used to verify the legitimacy of the substation sensing device, encrypt and decrypt the transmitted business data, and track and monitor the activities of the substation sensing device.

[0010] Preferably, the switch is provided with at least one output virtual terminal, and the secure access gateway is provided with at least one input virtual terminal. The output virtual terminal on the switch is connected to the input virtual terminal on the secure access gateway to form a transmission-independent service subnet.

[0011] Preferably, the service subnet includes at least one of a data monitoring service subnet, an access control service subnet, and an energy metering management service subnet, wherein:

[0012] The data monitoring service subnet is used to detect anomalies in the substation network operation status and the health status of substation sensing equipment and send alarms, manage the power distribution system, and monitor and control power supply stability;

[0013] The access control service subnet is used to monitor and control the connection security of the substation sensing equipment;

[0014] The energy metering management service subnet is used to manage and store the service data.

[0015] Preferably, the data monitoring service subnet includes substation sensing equipment, fusion terminals and switches connected through virtual terminals.

[0016] Preferably, the access control service subnet includes substation sensing equipment, fusion terminals, switches and application layer monitoring equipment connected through virtual terminals.

[0017] Preferably, the energy metering management service subnet includes a converged terminal, a switch, and an application layer monitoring device connected via a virtual terminal.

[0018] Preferably, the fusion terminal includes a classification unit, a sorting unit, a transmission unit, and a service subnet division unit, wherein:

[0019] The classification unit is used to classify the business data and perform type identification;

[0020] The sorting unit is used to sort the classified business data and perform sorting identification;

[0021] The transmission unit is used to transmit the classified and sorted business data to the corresponding transmission channel;

[0022] The service subnet division unit is used to create virtual terminals based on service types and connect them to build a service subnet.

[0023] Preferably, the sorting unit sorts the classified business data based on the priority evaluation index and performs sorting identification.

[0024] Preferably, the sorting unit sorts the classified business data based on the priority evaluation index and performs sorting identification, specifically:

[0025] The sorting unit calculates a comprehensive score for the classified business data based on the priority evaluation index, sorts the comprehensive scores by size, and performs a sorting mark.

[0026] Preferably, the comprehensive score is calculated using the following formula:

[0027] F=α1x1+α2x2+…+α i x i +…+α n-1 x n-1 +α n x n

[0028] Among them, F is the comprehensive score, α i is the weight coefficient corresponding to the i-th priority evaluation index, xi is the i-th priority evaluation index.

[0029] Preferably, n is 3, x1 is the data usage score, x2 is the message type score, x3 is the voltage level score, and α1>α2>α3, α1+α2+α3=1.

[0030] Preferably, a network traffic control unit is provided in the switch, and the network traffic control unit is used to forward service data according to the order based on the queue scheduling mechanism and the bandwidth protection mechanism.

[0031] Preferably, the application layer specifically includes a firewall, an application layer switch, an integrated network management system and a bandwidth authentication server. The firewall is connected to the secure access gateway, the input end of the application layer switch is connected to the firewall, and the output end of the application layer switch is connected to the bandwidth authentication server and the integrated network management system.

[0032] Preferably, the secure access gateway accesses the firewall via a wired network channel HTTP, Kafka or Datahub protocol.

[0033] Preferably, an unsupervised learning algorithm is provided in the integrated network management system for real-time monitoring and analysis of the business data.

[0034] Preferably, an energy metering management unit is provided in the integrated network management for managing measurement data of the substation.

[0035] In a second aspect, the present invention provides a flexible and scalable substation network control method, which is implemented based on the above-mentioned flexible and scalable substation network control system. The method includes:

[0036] Using the substation sensing device to obtain business data of the substation;

[0037] Using the converged terminal to classify and prioritize the service data, and transmitting the classified and prioritized service data to the switch through the corresponding transmission channel;

[0038] Based on the business data, the supervision device is used to monitor and manage the devices at the network layer and the perception layer in real time.

[0039] Preferably, the classifying and prioritizing the service data using the converged terminal includes:

[0040] Using the fusion terminal to classify the service data and perform type identification;

[0041] The business data after type identification is prioritized and sorted.

[0042] Preferably, the business data after type identification is prioritized and sorted, specifically:

[0043] The classified business data is sorted and marked based on the priority evaluation index.

[0044] Preferably, the classified business data is sorted and marked based on the priority evaluation index, specifically:

[0045] The classified business data is comprehensively scored based on the priority evaluation index, the comprehensive scores are sorted, and a sort mark is provided.

[0046] Preferably, the comprehensive score is calculated using the following formula:

[0047] F=α1x1+α2x2+…+α i x i +…+α n-1 x n-1 +α n x n

[0048] Among them, F is the comprehensive score, α i is the weight coefficient corresponding to the i-th priority evaluation index, x i is the i-th priority evaluation index.

[0049] Preferably, n is 3, x1 is the data usage score, x2 is the message type score, x3 is the voltage level score, and α1>α2>α3, α1+α2+α3=1.

[0050] Preferably, the classified and sorted business data is transmitted to the switch through the corresponding transmission channel, specifically:

[0051] The classified and sorted business data is then transmitted to the switch through the corresponding transmission channel in the sorting order.

[0052] Preferably, enabling the switch to forward the service data is specifically:

[0053] The switch forwards the service data in order based on the queue scheduling mechanism and the bandwidth protection mechanism.

[0054] According to a third aspect of the present invention, there is provided an electronic device comprising: at least one processor and a memory;

[0055] The memory is used to store one or more programs;

[0056] When the one or more programs are executed by the one or more processors, a flexible and scalable substation network control method as described above is implemented.

[0057] On the other hand, the present invention further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed, the flexible and scalable substation network control method as described above is implemented.

[0058] Compared with the prior art, the present invention has the following beneficial effects:

[0059] The present invention provides a flexible and scalable substation network control system and method, comprising a perception layer, a network layer, and an application layer, wherein: the perception layer includes a substation perception device, which is used to obtain business data of the substation; the network layer includes a fusion terminal and a switch, the fusion terminal includes at least one output virtual terminal, and the switch is provided with at least one input virtual terminal. The output virtual terminal of the fusion terminal is connected to the input virtual terminal on the switch in a one-to-one correspondence to form a transmission channel, and the fusion terminal is used to classify and prioritize the business data, and transmit the classified and sorted business data to the switch through the corresponding transmission channel; the application layer includes a supervision device, which is used to receive the business data of the switch and monitor and manage the devices of the network layer and the perception layer based on the business data; the present invention forms multiple different transmission channels by connecting virtual terminals, forwards the classified and sorted data separately, improves forwarding efficiency, and can also forward data sequentially based on its importance. The virtual terminal connection constructs the transmission channel, which is reconfigurable, so the transmission channel can be reconstructed based on the type of business data to form different business subnets, and has strong network scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 This is a schematic diagram of the structure of the flexible and scalable substation network control system proposed by the present invention;

[0061] Figure 2 A schematic diagram of the structure of the service subnet proposed in the present invention;

[0062] Figure 3 A schematic diagram of the workflow of the service subnet division unit proposed in the present invention;

[0063] Figure 4 This is a flow chart of the flexible and scalable substation network control system proposed by the present invention;

[0064] Figure 5 This is a schematic structural diagram of the electronic device proposed by the present invention. DETAILED DESCRIPTION

[0065] The present invention proposes a flexible and scalable substation network control system and method, which breaks through the limitations of static design and fixed paths and proposes a new network architecture that supports dynamic routing, service priority scheduling and fault self-recovery. It realizes the effective isolation and hierarchical transmission of various business types of data, dynamically allocates network resources, and ensures low-latency and highly reliable transmission of important messages, thereby further improving the flexibility of the substation network structure.

[0066] Example 1:

[0067] A flexible and scalable substation network control system, such as Figure 1 As shown, it includes the perception layer, network layer and application layer.

[0068] The perception layer is the lowest layer and is mainly used to deploy substation sensing equipment, including narrowband sensing equipment, broadband sensing equipment, broadband mobile terminals and other equipment, which are used to collect real-time business data such as temperature, humidity, voltage and other parameters of the substation.

[0069] The network layer includes a fusion terminal and a switch. The fusion terminal includes at least one output virtual terminal. The switch is provided with at least one input virtual terminal. The output virtual terminals of the fusion terminal are connected to the input virtual terminals on the switch in a one-to-one correspondence to form a transmission channel. The fusion terminal is used to classify and prioritize the business data, and transmit the classified and sorted business data to the switch through the corresponding transmission channel.

[0070] In a further preferred embodiment, the network layer further includes narrowband wireless access nodes (narrowband APs) and broadband wireless access nodes (broadband APs). The narrowband devices in the substation sensing devices are connected to the fusion terminal via the narrowband wireless access nodes; the broadband devices in the substation sensing devices are connected to the fusion terminal via the broadband wireless access nodes; and the wired sensing devices in the substation sensing devices are directly connected to the fusion terminal. The wireless access nodes are connected to the fusion terminal via the Ethernet interface. For example, wired sensors are connected to the fusion terminal via the serial port or Ethernet port; wireless sensors are first connected to the narrowband wireless access node and then to the fusion terminal; smart terminals such as smart helmets, mobile operation terminals, mobile control balls, wireless cameras, and inspection robots are first connected to the broadband wireless access node and then to the fusion terminal. In the network layer, the fusion terminal is connected to the subnet switch via a standardized wired network channel, using protocols and interface standards adapted to the transmission of power system services.

[0071] In a further preferred solution, the network layer further includes a secure access gateway, through which the switch accesses the application layer. The switch accesses the secure access gateway and the broadband authentication server and integrated network management in the application layer through a wired network.

[0072] In a further preferred solution, the secure access gateway is used to verify the legitimacy of the substation sensing equipment, encrypt and decrypt the transmitted business data, and track and monitor the activities of the substation sensing equipment. The secure access gateway accesses the firewall of the application layer through the wired network channel HTTP, Kafka or Datahub protocol. Specifically, a network security unit can be deployed in the secure access gateway for the secure access of the substation sensing layer equipment, responsible for ensuring its secure connection to the narrowband / broadband control center and ensuring the security and reliability of the network. At the same time, the module can also monitor the network security status and network traffic in real time, promptly detect and respond to security threats, and improve the security of the substation Internet of Things.

[0073] The application layer includes a monitoring device, which is used to receive business data of the switch and monitor and manage the devices of the network layer and the perception layer based on the business data.

[0074] In a further preferred solution, the application layer specifically includes a firewall, an application layer switch, an integrated network management system, and a bandwidth authentication server, which are used to centrally monitor and manage resources in the substation Internet of Things network. The firewall is connected to the secure access gateway, the input end of the application layer switch is connected to the firewall, and the output end of the application layer switch is connected to the bandwidth authentication server and the integrated network management system.

[0075] The substation network is divided into different business subnets based on business type, and each business subnet is assigned a globally unique business identifier. The corresponding business data can also be assigned a priority identifier. The priority of each business type is determined based on the message type, voltage level, data usage, etc., to achieve effective control of the substation IoT network. The business subnet technology based on priority identification segments and isolates the wireless sensor network according to business type, and dynamically adjusts the priority of the business subnet according to business needs to achieve rapid response to changes in the substation IoT system. By adding virtual terminals, creating new transmission channels, and dynamically adding new business subnets, the scalability requirements of the wireless sensor network are met. Traffic control is implemented based on business priority through the subnet switches and application layer network management equipment in the substation network, achieving efficient subnet management of the circulation station network functions.

[0076] The fusion terminal and subnet switch are both equipped with virtual terminals. The two ends of the transmission channel are connected to the virtual terminals of the fusion terminal and the subnet switch, respectively, to form multiple logically independent service subnets. Different service identifiers are assigned to different service subnets to transmit different service types. In other words, by creating a service subnet channel on the physical interface of the substation sensing device, the physical interface and the virtual service subnet corresponding to the service identifier are mutually corresponded; wherein, different service subnet channels under the same physical interface have independent queue scheduling mechanisms and bandwidth guarantee mechanisms, so that service forwarding in different service subnet channels is isolated from each other. Therefore, the service subnet based on the global service identifier realizes the isolation and management of different services, and dynamically creates new service subnets according to the new service requirements of the substation wireless sensor network to meet the changes in the substation service requirements.

[0077] In a further preferred solution, the service subnet preferably includes at least one of a data monitoring service subnet, an access control service subnet, and an energy metering management service subnet.

[0078] Specifically, such as Figure 2 As shown, the data monitoring service subnet is used to detect anomalies in the substation network operation status and the health status of the substation sensing equipment and send alarms, manage the distribution system, and monitor and control the power supply stability. The data monitoring service subnet includes substation sensing equipment, fusion terminals and switches connected through virtual terminals. For example, the substation sensing layer equipment includes narrowband sensing equipment, broadband sensing equipment, wired sensing equipment, broadband mobile terminals and other sensing layer sensing equipment and acquisition control terminals, as well as network layer subnet switches and secure access gateways. By monitoring the substation network operation status and equipment health status, abnormal situations are detected and alarms are sent, while ensuring that these alarms reach the operator in the shortest time interval and appropriate measures are taken; the network layer subnet switch equipment manages the distribution system based on the real-time collected data and executes control instructions to maintain stable power supply.

[0079] The access control service subnet is used to monitor and control the connection security of substation sensing devices. The access control service subnet includes substation sensing devices, integrated terminals, switches, and application layer devices connected through virtual terminals. For devices connected to the substation sensing layer, it is responsible for ensuring their secure connection to the narrowband / broadband control center and supporting security services for devices connected to the substation sensing layer. The security services include:

[0080] Identity authentication: Verify the legitimacy of devices connected to the substation's sensing layer through a security algorithm, effectively preventing unauthorized access to wireless sensor network devices and ensuring that access is limited to authorized sensing devices.

[0081] Data encryption: Encrypt and decrypt data before sending and when receiving to ensure data integrity and confidentiality, and ensure that data will not be stolen or tampered with by attackers during transmission and storage.

[0082] Operation Audit: By enabling wireless sensor network administrators to track the activities of various network devices, detect unauthorized operations, and provide detailed log information, administrators can quickly resolve problems when necessary.

[0083] The energy metering management service subnet is used to manage and store the service data. The energy metering management service subnet includes converged terminals, switches, and application-layer devices connected via virtual terminals, such as narrowband sensing devices, broadband sensing devices, and mobile bandwidth sensing devices. It also includes computing and storage facilities for managing the measurement data of the entire smart energy system. First, the narrowband sensing devices, broadband sensing devices, and mobile bandwidth sensing devices are used to monitor various devices within the system in real time. Second, the power usage of these devices is calculated and stored in the integrated network management system at the application layer for in-depth analysis to determine pricing strategies, power outage responses, and demand response.

[0084] Based on the above business subnet technology, the physical network shared by the substation is virtualized into multiple logical subnets to provide services for different access point sensing devices, thereby improving the flexibility and scalability of the substation network architecture.

[0085] In a further preferred solution, the fusion terminal includes a classification unit, a sorting unit, a transmission unit, and a service subnet division unit, wherein:

[0086] The classification unit is used to classify the business data and perform type identification;

[0087] The sorting unit is used to sort the classified business data and perform sorting identification;

[0088] The transmission unit is used to transmit the classified and sorted service data to the corresponding subnet switch, and the service subnet division unit is used to construct a service subnet based on the service type.

[0089] The service subnet division unit is used to achieve flexible network resource allocation and management. Based on service type, the entire substation network is divided into multiple independent, customizable service subnets, providing customized network services for different application scenarios. By assigning a globally unique service identifier to each service subnet, effective management and control of the substation wireless sensor network is achieved.

[0090] like Figure 3 As shown, the specific workflow of the service subnet division unit is as follows:

[0091] Step 1: Plan different service subnets and service subnet identifiers based on the type of service data, so that each service subnet transmits one type of service data.

[0092] Step 2: Based on the type of service data, a virtual terminal is constructed on the device to be transmitted and a connection is established to create a service subnet. Different service subnet channels have independent queue scheduling mechanisms and bandwidth guarantee mechanisms to ensure that service forwarding in different service subnet channels does not affect each other.

[0093] In a further preferred solution, the sorting unit sorts the classified business data based on the priority evaluation index and performs sorting identification. Therefore, the representation of the business data includes a type identification and a priority identification.

[0094] In a further preferred solution, the sorting unit calculates a comprehensive score for the classified business data based on the priority evaluation index, sorts the comprehensive scores by size, and performs a sorting mark.

[0095] In a further preferred solution, the comprehensive score is calculated using the following formula:

[0096] F=α1x1+α2x2+…+α i x i +…+α n-1 x n-1 +α n x n

[0097] Among them, F is the comprehensive score, α i is the weight coefficient corresponding to the i-th priority evaluation index, x i is the i-th priority evaluation index.

[0098] In this embodiment, n is 3, x1 is the data usage score, x2 is the message type score, x3 is the voltage level score, and α1>α2>α3, α1+α2+α3=1.

[0099] Among them, the data usage scoring setting is: messages related to the safe operation, protection and fault recovery of the power grid need to have the highest priority and therefore have a higher score. The messages contain key information such as the handling of emergency events, the operation of protection equipment and the recovery operation of power grid faults. In contrast, routine sampling messages such as metering and management belong to routine tasks and have the lowest priority and lower scores.

[0100] Message type scoring setting: GOOSE (generic object oriented substation event) message data of narrowband sensing monitoring points involving control and sensitivity has a higher priority and a higher score. Among them, the control and sensitive equipment at the perception layer contains key information of the real-time monitoring and control network, and its GOOSE message data needs to have a higher priority than other types of message data.

[0101] Voltage level scoring setting: High-voltage level data messages have higher priority and higher scores. Among them, the high-voltage level equipment and lines of the substation carry a larger load and more important tasks, such as transmitting key information, control information and emergency operations. In order to ensure the safe operation and stability of the high-voltage equipment in the circulation station, high-voltage level data messages need to have a higher priority.

[0102] In summary, when applying the service subnet division scheme with priority service identifiers to the substation network architecture, messages related to safe operation, protection and fault recovery of the power grid need to have the highest priority, followed by GOOSE messages for control and sensitive equipment at the perception layer, and then high-voltage data messages.

[0103] In a further preferred embodiment, the switch is equipped with a network traffic control unit, which is used to forward service data according to the order based on the queue scheduling mechanism and bandwidth protection mechanism, thereby achieving efficient traffic control for the substation wireless sensor network. The switch identifies service priorities and automatically adjusts service subnet parameters such as bandwidth and QoS based on different service requirements and network traffic, thereby improving network utilization, service availability, and reliability. The switch is also equipped with a precision timing device to achieve time synchronization for the entire system.

[0104] To achieve effective control of substation network traffic, an intelligent substation network system is created by deploying unsupervised learning algorithms in the substation application layer network management equipment, combining sensor networks and cloud computing technologies. Unsupervised learning methods are used to monitor and analyze the massive monitoring data generated in the substation IoT perception layer and network layer in real time, thereby achieving intelligent management and control of the wireless sensor network and improving service availability and equipment reliability.

[0105] Specifically, unsupervised learning methods are used to achieve intelligent network management and optimization. Through machine learning and big data analysis, generated power data is analyzed and mined to achieve dynamic scheduling and optimization of the unlimited sensor network. Furthermore, by collecting and analyzing data from sensing devices, automated management and maintenance of the equipment is achieved, further improving system service availability and equipment reliability. Sensor networks and cloud computing technologies are combined to achieve real-time monitoring and control of the network. Sensor devices at the sensor layer collect real-time data on substation parameters such as temperature, humidity, and voltage, enabling real-time monitoring and early warning of equipment. This collected data is then uploaded to the cloud for analysis and processing using cloud computing, reducing end-to-end transmission latency within the substation IoT system.

[0106] Through the supervision equipment at the application layer, the wireless sensor network equipment is monitored and analyzed in real time. When a network failure or abnormality occurs, the network monitoring system can detect and handle it in time to ensure the normal operation of the network. At the same time, the network maintenance system is used to regularly maintain and optimize the network to ensure efficient operation.

[0107] In a further preferred solution, an energy metering management unit is provided in the integrated network management system for managing the measurement data of the substation, specifically for managing wired and wireless sensing devices as well as computing and storage devices, and for conducting in-depth analysis to determine pricing strategies, power outage reactions and demand responses based on the strategic data storage formed by the substation.

[0108] The present invention proposes a flexible and scalable substation network architecture, which breaks through the limitations of existing substation network architecture in terms of business management and resource utilization. It focuses on optimizing the design according to the requirements of high real-time performance, business diversity and network scalability of substations, and solves the problems of substation sensor networks lacking an overall design and inflexible structure, resulting in high end-to-end transmission delay and low node reliability.

[0109] First, based on the business subnet division, the present invention proposes a business priority identification mechanism, which performs fine-grained management and traffic scheduling on different businesses through priority identification, ensuring that key businesses can be given priority, and flexibly creating, adjusting and expanding business subnets according to real-time business needs. The present invention realizes a dynamic business subnet creation and expansion mechanism, which is different from the static subnet division of existing substation networks. It can dynamically increase or adjust subnet resources according to real-time changes in business needs, improve the scalability of the substation network architecture, and realize refined management of the substation network, better control the operating status of the substation, and improve operating efficiency and stability.

[0110] Secondly, the present invention realizes service priority identification and traffic control through switches and network management equipment, and optimizes the network layer data transmission path in combination with the data characteristics of different service types, realizes fine-grained dynamic identification and scheduling of service priorities, improves the flexibility of substation network architecture, and improves the high latency and low reliability problems of substation Internet of Things systems, thereby providing reliable solutions and technical support for power fields such as substations, and providing guidance for technologies such as reliability, security and intelligence of substation wireless sensor networks.

[0111] Example 2:

[0112] The present invention based on the same inventive concept also provides a flexible and scalable substation network control method, which is implemented based on the above-mentioned flexible and scalable substation network control system, such as Figure 4 As shown, the method includes:

[0113] S1: using the substation sensing device to obtain the substation's business data;

[0114] S2: using the converged terminal to classify and prioritize the service data, and transmitting the classified and prioritized service data to the switch through the corresponding transmission channel;

[0115] S3: Based on the business data, the supervision device is used to monitor and manage the devices at the network layer and the perception layer in real time.

[0116] In a further preferred solution, the classifying and prioritizing the service data using the converged terminal includes:

[0117] Using the fusion terminal to classify the service data and perform type identification;

[0118] The business data after type identification is prioritized and sorted.

[0119] In a further preferred solution, the business data after type identification is prioritized and sorted, specifically:

[0120] The classified business data is sorted and marked based on the priority evaluation index.

[0121] In a further preferred solution, the classified business data is sorted and marked based on the priority evaluation index, specifically:

[0122] The classified business data is comprehensively scored based on the priority evaluation index, the comprehensive scores are sorted, and a sort mark is provided.

[0123] In a further preferred solution, the comprehensive score is calculated using the following formula:

[0124] F=α1x1+α2x2+…+α i x i +…+α n-1 x n-1 +α n x n

[0125] Among them, F is the comprehensive score, α i is the weight coefficient corresponding to the i-th priority evaluation index, x i is the i-th priority evaluation index.

[0126] In a further preferred solution, n is 3, x1 is the data usage score, x2 is the message type score, x3 is the voltage level score, and α1>α2>α3, α1+α2+α3=1.

[0127] In a further preferred solution, the classified and sorted business data is transmitted to the switch through the corresponding transmission channel, specifically:

[0128] The classified and sorted business data is then transmitted to the switch through the corresponding transmission channel in the sorting order.

[0129] In a further preferred solution, enabling the switch to forward the service data is specifically as follows:

[0130] The switch forwards the service data in order based on the queue scheduling mechanism and the bandwidth protection mechanism.

[0131] Example 3

[0132] like Figure 5 As shown, the present invention also provides an electronic device, which may be a computer, a single-chip microcomputer, a smart mobile device, or the like. The electronic device in this embodiment may include a processor, a memory, a transceiver component, and the like. The memory, processor, and transceiver component are connected via a bus; the memory may be used to store an execution program, which may include instructions; and the processor may be used to execute the instructions stored in the memory. The memory may also be used to store data, which may be accessed and / or modified during the execution of the instructions.

[0133] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), or application-specific integrated circuits.

[0134] (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., which are the computing core and control core of the terminal, and are suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in the storage medium to implement the corresponding method flow or corresponding function, so as to realize the steps of a flexible and scalable substation network control method in the above embodiment.

[0135] Example 4

[0136] Based on the same inventive concept, the present invention also provides a readable storage medium, specifically an electronic device readable storage medium (Memory), which is a memory device in the electronic device for storing programs and data. It can be understood that the storage medium here can include both the built-in storage medium in the electronic device and, of course, the extended storage medium supported by the electronic device. The storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space. These instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor loads and executes one or more instructions stored in the storage medium, which can implement the steps of a flexible and expandable substation network control method in the above embodiment.

[0137] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0138] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0139] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0140] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0141] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A flexible and scalable substation network control system, characterized by: It includes the perception layer, network layer and application layer, among which: The perception layer includes a substation perception device, which is used to obtain business data of the substation; The network layer includes a converged terminal and a switch. The converged terminal includes at least one output virtual terminal. The switch is provided with at least one input virtual terminal. The output virtual terminals of the converged terminal are connected to the input virtual terminals on the switch in a one-to-one correspondence to form a transmission channel. The converged terminal is used to classify and prioritize the service data, and transmit the classified and prioritized service data to the switch through the corresponding transmission channel. The application layer includes a monitoring device, which is used to receive business data of the switch and monitor and manage the devices of the network layer and the perception layer based on the business data.

2. The flexible and scalable substation network control system according to claim 1 is characterized in that: The network layer also includes narrowband wireless access nodes and broadband wireless access nodes. The narrowband devices in the substation sensing device are connected to the fusion terminal through the narrowband wireless access nodes; the broadband devices in the substation sensing device are connected to the fusion terminal through the broadband wireless access nodes; and the wired sensing devices in the substation sensing device are directly connected to the fusion terminal.

3. The flexible and scalable substation network control system according to claim 1, characterized in that: The network layer also includes a secure access gateway, the input end of which is connected to the output end of the switch, and is used to verify the legitimacy of the substation sensing device, encrypt and decrypt the transmitted business data, and track and monitor the activities of the substation sensing device.

4. The flexible and scalable substation network control system according to claim 3 is characterized in that: The switch is provided with at least one output virtual terminal, and the secure access gateway is provided with at least one input virtual terminal. The output virtual terminal on the switch is connected to the input virtual terminal on the secure access gateway to form an independent service subnet for transmission.

5. The flexible and scalable substation network control system according to claim 4 is characterized in that: The service subnet includes at least one of a data monitoring service subnet, an access control service subnet, and an energy metering management service subnet, wherein: The data monitoring service subnet is used to detect anomalies in the substation network operation status and the health status of substation sensing equipment and send alarms, manage the power distribution system, and monitor and control power supply stability; The access control service subnet is used to monitor and control the connection security of the substation sensing equipment; The energy metering management service subnet is used to manage and store the service data.

6. The flexible and scalable substation network control system according to claim 5, characterized in that: The data monitoring service subnet includes substation sensing equipment, fusion terminals and switches connected through virtual terminals.

7. The flexible and scalable substation network control system according to claim 5, characterized in that: The access control service subnet includes substation sensing equipment, fusion terminals, switches and application layer monitoring equipment connected through virtual terminals.

8. The flexible and scalable substation network control system according to claim 5, characterized in that: The energy metering management service subnet includes a converged terminal, a switch and an application layer monitoring device connected through a virtual terminal.

9. The flexible and scalable substation network control system according to claim 1, characterized in that: The fusion terminal includes a classification unit, a sorting unit, a transmission unit, and a service subnet division unit, wherein: The classification unit is used to classify the business data and perform type identification; The sorting unit is used to sort the classified business data and perform sorting identification; The transmission unit is used to transmit the classified and sorted business data to the corresponding transmission channel; The service subnet division unit is used to create virtual terminals based on service types and connect them to build a service subnet.

10. The flexible and scalable substation network control system according to claim 9, characterized in that: The sorting unit sorts the classified business data based on the priority evaluation index and performs sorting identification.

11. The flexible and scalable substation network control system according to claim 10, characterized in that: The sorting unit sorts the classified business data based on the priority evaluation index and performs sorting identification, specifically: The sorting unit calculates a comprehensive score for the classified business data based on the priority evaluation index, sorts the comprehensive scores by size, and performs a sorting mark.

12. The flexible and scalable substation network control system according to claim 11, characterized in that: The comprehensive score is calculated using the following formula: F=α1x1+α2x2+…+α i x i +…+a n-1 x n-1 +a n x n Among them, F is the comprehensive score, α i is the weight coefficient corresponding to the i-th priority evaluation index, x i is the i-th priority evaluation index.

13. The flexible and scalable substation network control system according to claim 12, characterized in that: n is 3, x1 is the data usage score, x2 is the message type score, x3 is the voltage level score, and α1>α2>α3, α1+α2+α3=1.

14. The flexible and scalable substation network control system according to claim 1, characterized in that: The switch is provided with a network traffic control unit, which is used to forward service data according to the order based on the queue scheduling mechanism and the bandwidth protection mechanism.

15. The flexible and scalable substation network control system according to claim 3, characterized in that: The application layer specifically includes a firewall, an application layer switch, an integrated network management system and a bandwidth authentication server. The firewall is connected to the secure access gateway, the input end of the application layer switch is connected to the firewall, and the output end of the application layer switch is connected to the bandwidth authentication server and the integrated network management system.

16. The flexible and scalable substation network control system according to claim 15, characterized in that: The secure access gateway accesses the firewall via a wired network channel HTTP, Kafka or Datahub protocol.

17. The flexible and scalable substation network control system according to claim 15, characterized in that: An unsupervised learning algorithm is provided in the integrated network management system for real-time monitoring and analysis of the business data.

18. The flexible and scalable substation network control system according to claim 15, characterized in that: The integrated network management is provided with an energy metering management unit for managing the measurement data of the substation.

19. A flexible and scalable substation network control method, characterized in that: Based on the flexible and scalable substation network control system according to any one of claims 1 to 18, the method includes: Using the substation sensing device to obtain business data of the substation; Using the converged terminal to classify and prioritize the service data, and transmitting the classified and prioritized service data to the switch through a corresponding transmission channel, so that the switch forwards the service data; Based on the business data, the supervision device is used to monitor and manage the devices at the network layer and the perception layer in real time.

20. The flexible and scalable substation network control method according to claim 19, characterized in that: The classifying and prioritizing the service data using the converged terminal includes: Using the fusion terminal to classify the service data and perform type identification; The business data after type identification is prioritized and sorted.

21. The flexible and scalable substation network control method according to claim 20, characterized in that: The business data after type identification is prioritized and sorted, specifically: The classified business data is sorted and marked based on the priority evaluation index.

22. The flexible and scalable substation network control method according to claim 21, characterized in that: The classified business data is sorted and marked based on the priority evaluation index, specifically: The classified business data is comprehensively scored based on the priority evaluation index, the comprehensive scores are sorted, and a sort mark is provided.

23. The flexible and scalable substation network control method according to claim 22, characterized in that: The comprehensive score is calculated using the following formula: F=α1x1+α2x2+…+α i x i +…+a n-1 x n-1 +a n x n Among them, F is the comprehensive score, α i is the weight coefficient corresponding to the i-th priority evaluation index, x i is the i-th priority evaluation index.

24. The flexible and scalable substation network control method according to claim 23, characterized in that: n is 3, x1 is the data usage score, x2 is the message type score, x3 is the voltage level score, and α1>α2>α3, α1+α2+α3=1.

25. The flexible and scalable substation network control method according to claim 19, characterized in that: The classified and sorted business data is transmitted to the switch through the corresponding transmission channel, specifically: The classified and sorted business data is then transmitted to the switch through the corresponding transmission channel in the sorting order.

26. The flexible and scalable substation network control method according to claim 19, characterized in that: The step of enabling the switch to forward the service data is specifically as follows: The switch forwards the service data in order based on the queue scheduling mechanism and the bandwidth protection mechanism.

27. An electronic device, characterized in that: include: at least one processor and memory; The memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, the flexible and scalable substation network control method according to any one of claims 19 to 26 is implemented.

28. A computer-readable storage medium, characterized in that An execution program is stored thereon, and when the execution program is executed, the flexible and scalable substation network control method as described in any one of claims 19 to 26 is implemented.

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