A method and system for analyzing power network communication

Abstract

The present invention discloses a method and system for analyzing power network communication. First, a network architecture model from the substation end to the distribution network end and then to the power consumption end needs to be established. The substation end is divided into a three-layer structural model, namely, the station control layer, the interval layer, and the substation end process layer; then the distribution network end is divided into a three-layer model of the main station layer, the feeder layer, and the distribution network process layer, and then the network analysis device is connected to the switch of the distribution network end, and the normal operation of the distribution network end is realized through the network analysis device. The present invention fills the research gap in the analysis of power distribution networks. The remote transmission step is omitted by setting up a network analysis device, so that professionals can perform fault analysis and fault resolution in real time according to network message analysis. The bad data based on the mutation detection in the distribution network can be processed at the first time and the bad data can be identified in time, thereby improving the efficiency of identifying bad data.

Description

Technical Field

[0001] The present invention relates to the field of power station communications, and in particular to a power network communication analysis method and system thereof. Background Art

[0002] With the rapid development of smart substations, the selection and filtering of network messages, online recording, and network traffic statistics are effectively realized through the analysis of massive messages, which plays an important role in smart substations. However, with the large-scale access of new energy sources such as wind power and solar power generation with greater volatility and randomness, the operation mode of the active distribution network has become more complex and changes more rapidly. Since the current power distribution data mostly uses wireless networks to send data directly to the dispatching end for control, the data that needs to be analyzed is controlled and analyzed at the dispatching end. Often, the data analysis results cannot be transmitted to the data generation site in real time, making it impossible for professionals to perform fault analysis, fault resolution, field investigation, etc. based on network message analysis in real time. At the same time, the bad data based on mutation detection in the distribution network cannot be processed in the first time, and the bad data cannot be identified in time, etc., and the communication analysis efficiency of the power network is low. Summary of the invention

[0003] In order to solve the above problems, the present invention introduces network analysis from the distribution end to the power consumption end on the basis of constructing a power distribution network, analyzes the relevant information of communication within the network system, makes the operation status of the automation system transparent, and can timely discover power network communication anomalies by locally setting up a network analysis device, thereby improving the communication analysis efficiency of the power network.

[0004] On the one hand, a method for analyzing power network communication is provided, comprising the following steps:

[0005] Establishing a power distribution network architecture, wherein the power distribution network architecture includes a substation end, a distribution network end, and a power consumption end connected in sequence;

[0006] The substation end is divided into a three-layer structure model, which includes a station control layer, an interval layer, and a substation end process layer arranged in sequence; wherein the substation end process layer includes the terminal equipment of the substation end, the interval layer is used to transmit the information of the substation end process layer to the station control layer, the interval layer is connected to a first network analysis device, and the first network analysis device is used to perform real-time analysis on the information transmitted from the substation end process layer;

[0007] The distribution network end is divided into a three-layer model, which includes a master station layer, a feeder layer, and a distribution network process layer; wherein the distribution network process layer includes a feeder terminal device, a distribution transformer terminal device, and a switchgear terminal device arranged in sequence, the feeder layer is used to connect the master station layer and the distribution network process layer, the master station layer is used to receive information transmitted from the distribution network process layer, a second network analysis device is arranged between the master station layer and the feeder layer, and the second network analysis device is used to perform real-time analysis on the information transmitted from the distribution network process layer;

[0008] The power-consuming end is divided into a two-layer model, which includes a management layer and a field device layer; wherein the management layer is used to monitor the information transmitted by the field device layer, and a third network analysis device is set on the line connecting the field device layer and the management layer, and the third network analysis device is used to analyze the information transmitted by the field device layer in real time.

[0009] Optionally, information is transmitted inside the substation through a backbone optical communication network.

[0010] Optionally, the network connecting the substation end and the distribution network end is one of medium voltage PLC, OPPC, and WPLC networks.

[0011] Optionally, the network connecting the distribution network end and the power consumption end is one of low-voltage PLC, WSN, and RS485 networks.

[0012] Optionally, the station control layer includes a substation monitoring host, a communication server, a motion workstation, a time synchronization server, and a data server;

[0013] The spacing layer includes a measurement and control device, a switch of the spacing layer, and a protection device;

[0014] The substation-end process layer includes a merging unit, an intelligent terminal, an intelligent component, a mutual inductor, a circuit breaker, and a disconnector;

[0015] The substation monitoring host, the communication server, the motion workstation, the time synchronization server, the data server, the measurement and control device, the switch of the interval layer, and the protection device establish information service connections with each other through the MMS network;

[0016] The measurement and control device, the switch at the interval layer, the protection device, the merging unit, the intelligent terminal, the intelligent component, the mutual inductor, the circuit breaker, and the isolating switch establish information service connections with each other through the GOOSE network or the SV network.

[0017] Optionally, the master station layer includes at least two master station monitoring hosts;

[0018] The feeder layer includes two distribution substations adapted to the number of monitoring hosts at the master station;

[0019] Two network distribution end switches adapted to the number of master station monitoring hosts are arranged between the master station layer and the feeder layer;

[0020] Each of the master station monitoring hosts is connected to the corresponding distribution substation via the switches at the distribution network end, and information interaction is supported between the switches at the distribution network end, and energy transfer is supported between the two distribution substations;

[0021] The distribution network process layer includes feeder terminal equipment, distribution transformer terminal equipment, and switchgear terminal equipment;

[0022] The feeder terminal equipment is connected to one of the distribution substations, the switchgear terminal equipment is connected to another distribution substation, and the feeder terminal equipment and the switchgear terminal equipment are connected via the distribution transformer terminal equipment;

[0023] The switches at the two distribution network ends support information interaction;

[0024] Energy transfer is supported between the two power distribution substations.

[0025] Optionally, the management layer includes two management and monitoring hosts, and each of the management and monitoring hosts is configured with a switch at the power consumption end;

[0026] The field equipment layer includes load control terminals, distributed power generation and energy storage monitoring systems, and charging station monitoring and management systems;

[0027] The load control terminal is connected to a switch at one of the power consumption ends, and the monitoring and management system in the charging station is connected to a switch at another power consumption end;

[0028] The switches at the two power consumption ends both support collecting information of the distributed power generation and energy storage monitoring system.

[0029] Optionally, the first network analysis device is connected to a switch of the bay layer;

[0030] The number of the second network analysis devices is two, and each of the second network analysis devices is connected to one switch at each of the two distribution network ends;

[0031] The number of the third network analysis devices is two, and each of the third network devices is connected to a switch respectively connected to the two management layers.

[0032] Optionally, the second network analysis device analyzes the real-time network information, offline information, offline status information, power grid structure parameter information, and geographic information of the distribution network process layer, and marks abnormal data in the distribution network process layer, and locates the location where the abnormal data occurs;

[0033] The third network device analyzes the user information, service information, and communication network information in the management layer, and performs terminal detection and fault analysis based on abnormal data obtained after the analysis.

[0034] On the other hand, a power network communication analysis system is also provided, comprising a substation end, a distribution network end, and a power end connected in sequence; wherein:

[0035] The substation end includes a station control layer, a bay layer, and a substation end process layer which are arranged in sequence;

[0036] The substation end includes a station control layer, an interval layer, and a substation end process layer which are arranged in sequence; wherein the substation end process layer includes the terminal equipment of the substation end, the interval layer is used to transmit the information of the substation end process layer to the station control layer, the interval layer is connected to a first network analysis device, and the first network analysis device is used to perform real-time analysis on the information transmitted from the substation end process layer;

[0037] The distribution network end includes a master station layer, a feeder layer, and a distribution network process layer; wherein the distribution network process layer includes a feeder terminal device, a distribution transformer terminal device, and a switchgear terminal device arranged in sequence, the feeder layer is used to connect the master station layer and the distribution network process layer, the master station layer is used to receive information transmitted from the distribution network process layer, a second network analysis device is arranged between the master station layer and the feeder layer, and the second network analysis device is used to perform real-time analysis on the information transmitted from the distribution network process layer;

[0038] The power-consuming end includes a management layer and a field device layer; wherein the management layer is used to monitor the information transmitted by the field device layer, and a third network analysis device is set on the line connecting the field device layer and the management layer, and the third network analysis device is used to analyze the information transmitted by the field device layer in real time.

[0039] Beneficial effects: The present invention fills the gap in the research of power distribution network analysis. It divides the distribution network end and the power consumption end into models, and configures network analysis devices at the substation end, the distribution network end, and the power consumption end. In this way, the substation end, the distribution network end, and the power consumption end can perform real-time network analysis locally. The data that needs to be analyzed will be timely controlled and analyzed locally, eliminating the remote transmission step, so that professionals can perform fault analysis and fault resolution in real time based on network message analysis. Bad data based on mutation detection in the distribution network can be processed in the first time to identify bad data in a timely manner, thereby improving the efficiency of identifying bad data and the efficiency of communication analysis of the power consumption network. This method is conducive to coping with the increasingly complex active distribution network. The network analysis device analyzes the characteristics of the data packets flowing in the increasingly complex distribution network, so that the local network system can be understood more comprehensively and accurately, and the hidden dangers and risks in the distribution network can be detected.

[0040] The present invention divides the distribution network end into three-layer models and introduces a network analysis device to each layer to perform real-time analysis on the information uploaded by its terminal equipment. For example, the network analysis device analyzes the data messages passing through the switch on the basis of establishing a communication network to find hidden dangers and abnormalities, and analyzes and diagnoses network operation failures. Therefore, setting up network analysis devices at the substation, distribution network end, and power consumption end respectively can make the operation of the system more stable, which is beneficial to the debugging system and the monitoring system security. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a flow chart of the power network communication analysis method provided by the present invention;

[0042] Figure 2 It is a structural model from the substation end to the power consumption end provided by the present invention;

[0043] Figure 3 It is a schematic diagram of the network architecture of the power network communication analysis system provided by the present invention;

[0044] Figure 4 It is the substation end network structure model provided by the present invention;

[0045] Figure 5 It is the network structure model of the distribution network end provided by the present invention;

[0046] Figure 6 It is the network structure model of the power consumption end provided by the present invention;

[0047] Figure 7 It is an architecture diagram of the network analysis device provided by the present invention. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms first, second, third, etc. are used herein to describe various components or parts, but these components or parts are not limited by these terms. These terms are only used to distinguish one component or part from another component or part. Terms such as "first", "second" and other numerical items do not imply order or sequence when used herein unless clearly indicated by the context. For ease of description, spatial relative terms such as "interior", "exterior", "upper end", "lower end", "left side", "right side", "upper", "left", "right", etc. are used herein to describe the orientation relationship of components or parts in this embodiment, but these spatial relative terms do not limit the orientation of technical features in practical applications.

[0050] like Figure 1 to Figure 2 As shown, a method for analyzing power network communication in an embodiment of the present invention includes the following steps:

[0051] A distribution network architecture is established, which includes a substation end, a distribution network end, and a power consumption end connected in sequence.

[0052] The substation end is divided into a three-layer structure model, which includes a station control layer, an interval layer, and a substation end process layer which are arranged in sequence; wherein the substation end process layer includes terminal equipment at the substation end, the interval layer is used to transmit information of the substation end process layer to the station control layer, the interval layer is connected to a first network analysis device, and the first network analysis device is used to analyze information transmitted from the substation end process layer.

[0053] The distribution network end is divided into a three-layer model, which includes a master station layer, a feeder layer, and a distribution network process layer; wherein the distribution network process layer includes feeder terminal equipment, distribution transformer terminal equipment, and switchgear terminal equipment arranged in sequence, the feeder layer is used to connect the master station layer and the distribution network process layer, the master station layer is used to receive information transmitted from the distribution network process layer, and a second network analysis device is arranged between the master station layer and the feeder layer, and the second network analysis device is used to perform real-time analysis on the information transmitted from the distribution network process layer.

[0054] The power consumption end is divided into a two-layer model, which includes a management layer and a field device layer; wherein the management layer is used to monitor the information transmitted by the field device layer, and a third network analysis device is set on the line connecting the field device layer and the management layer, and the third network analysis device is used to analyze the information transmitted by the field device layer.

[0055] This method mainly includes: first, it is necessary to establish a network architecture model from the substation end to the distribution network end and then to the power consumption end. The substation end is divided into a three-layer structure model, that is, the station control layer-interval layer-substation process layer; then the distribution network end is divided into a three-layer model of the main station layer-feeder layer-distribution network process layer, and then the second network analysis device is connected to the switch of the distribution network end, and the normal operation of the distribution network end and the detection, protection, control and distribution management in the event of an accident are realized through network analysis; then the power consumption end is divided into the management layer and the field equipment layer, and the third network analysis device is connected to the switch of the power consumption end to monitor and analyze user information, business information, communication network, etc. The communication network includes an information transmission part, an information exchange part, and a terminal equipment part.

[0056] The present invention mainly establishes a model for the communication system of the power grid, establishes a three-layer model for the substation end, and the work instructions are transmitted from top to bottom (station control layer → interval layer → substation end process layer), and information transmission and information analysis are from bottom to top (substation end process layer → interval layer → station control layer); establishes a three-layer model for the distribution network end, and the work instructions are also from top to bottom (master station layer → feeder layer → distribution network process layer), and information transmission and information analysis are from bottom to top (distribution network process layer → feeder layer → master station layer), and the same is true for the power consumption end, the work instructions are from top to bottom (management layer → field equipment layer), and information transmission and information analysis are from bottom to top. The present invention divides the power consumption network by establishing a three-layer model and a two-layer model, so that in the process of network analysis, the location of the problem can be clearly understood. The network analysis devices at the substation end, the power consumption end, and the distribution network end respectively analyze the data messages passing through their respective switches and find hidden dangers and anomalies to achieve normal operation of the power grid.

[0057] Among them, the second network analysis device analyzes the real-time information of the network situation, offline status information, grid structure parameters, and geographic information of the distribution network process layer, and marks the abnormal data in the distribution network process layer and locates the location of the abnormal data; the third network device analyzes the user information, business information, and communication network in the management layer, and performs detection and fault analysis on the abnormal data obtained after the analysis. For example, the power user terminal analyzes whether there is line loss based on the business information combined with the power consumption information in the user information, and locates the location of the line loss based on the geographic information; or the distribution network terminal analyzes whether its terminal equipment cannot operate based on the grid parameters, offline data, etc., and determines the location of the terminal equipment that cannot operate based on the geographic information; or the staff integrates the analysis results of the second network analysis device and the third network analysis device, compares the power consumption of the same time end every day, month, and year, analyzes the local energy consumption according to the working conditions of the equipment, or observes whether there are problems such as equipment aging. The second network analysis device and the first network analysis device collect and analyze the terminal equipment data. The analysis results of the present invention are not limited to the above analysis results, and they are not listed one by one here.

[0058] like Figure 3 In a possible implementation, information is transmitted inside the substation through a backbone optical communication network. The network connected between the substation and the distribution network is one of the medium voltage PLC (Power Line Communication), OPPC (Optical Phase Conductor), and WPLC (Wide Power Line Carrier) networks.

[0059] The network connecting the distribution network and the power consumption end is one of the low-voltage PLC, WSN, and RS485 networks. Among them, WSN is a wireless sensor network, and the RS485 communication network generally adopts the master-slave communication mode, that is, one host with multiple slaves, which can realize point-to-point communication and networking functions.

[0060] The existing backbone optical communication network can be used from the power distribution dispatching end to the substation end, a medium-voltage PLC, OPPC or WPLC network can be built from the substation end to the distribution network end, and a low-voltage PLC or WSN or RS485 network can be built from the distribution network end to the power consumption end (the power consumption end is the user end). The above networks can be selected based on local existing equipment, construction environment and other factors.

[0061] In one possible implementation, the station control layer includes a substation monitoring host, a communication server, a motion workstation, a timing server, and a data server; the interval layer includes a measurement and control device, a switch at the interval layer, and a protection device; the substation end process layer includes a merging unit, an intelligent terminal, an intelligent component, a mutual inductor, a circuit breaker, and a disconnector; wherein the substation monitoring host, the communication server, the motion workstation, the timing server, the data server, the measurement and control device, the switch at the interval layer, and the protection device establish information service contacts with each other through MMS (Multimedia Message Management System); the measurement and control device, the switch at the interval layer, the protection device, the merging unit, the intelligent terminal, the intelligent component, the mutual inductor, the circuit breaker, and the disconnector establish information service contacts with each other through the GOOSE network or the SV network.

[0062] like Figure 4 , the first network analysis device mainly acts on the station control layer and analyzes all communication messages in the network system. Make the operation status of the automation system transparent, discover abnormal operation status in time and perform alarm processing. The model at the substation end includes the station control layer, the interval layer and the substation process layer. The station control layer includes the substation monitoring host, the communication server, the telecontrol workstation, the time server and the data server. The interval layer includes the measurement and control device and the protection device. The process layer includes the merging unit, the intelligent terminal, the intelligent component, the mutual inductor, the circuit breaker and the disconnector. Among them, the first network analysis device performs data analysis on the data in the switch connected to the MMS network, the GOOSE network and the SV network. The network analysis at the substation end is responsible for receiving, recording and storing messages for the entire process of the communication network of the substation end automation system, analyzing faults and providing powerful means for the debugging, operation and analysis of the intelligent substation end.

[0063] This substation adopts the IEC61850 standard. The standard application technology of IEC61850 enables many devices from different manufacturers to interoperate with each other due to its clear and unified hierarchical information model. It eliminates the traditional operation method of using a large number of protocol converters in the substation to simplify the network layer. In addition, the standard application technology of IEC61850 is an open protocol.

[0064] like Figure 5, the master station layer includes at least two master station monitoring hosts, the feeder layer includes a distribution substation adapted to the number of master station monitoring hosts, and a switch adapted to the number of master station monitoring hosts is set between the master station layer and the feeder layer; for example, the master station layer includes two master station monitoring hosts. The feeder layer includes two distribution substations; two switches at the distribution network end are set between the master station layer and the feeder layer; each master station monitoring host is connected to its corresponding distribution substation through its respective switch at the distribution network end; the distribution network process layer includes feeder terminal equipment, distribution transformer terminal equipment, and switchgear terminal equipment; the feeder terminal equipment is connected to one of the distribution substations, the switchgear terminal equipment is connected to another distribution substation, and the feeder terminal equipment is connected to the switchgear terminal equipment through the distribution transformer terminal equipment; the switches at the two distribution network ends support information interaction; and the two distribution substations support energy transfer.

[0065] Similar to the substation network structure model, the distribution network is divided into three layers, among which the master station layer is used to realize control, monitor fault points, locate fault points, isolate and restore power supply to fault points; the feeder layer is used to monitor medium-voltage feeders and multiple terminal devices for information exchange; the substation process layer includes feeder terminal equipment (FTU), distribution transformer terminal equipment (TTU) and switchgear terminal equipment (DTU), and the substation process layer is used to implement detection and operation information and ensure the driving and execution of control instructions. The access of centralized photovoltaic, small thermal power, small hydropower, wind power and other energy sources makes the distribution network more complex. Modern electronic technology, communication technology, computer and network technology are used to safely integrate the real-time information, offline status information, grid structure parameters and geographic information of the distribution network to form a complete automation and management system. The second network analysis device is connected to the switch of the distribution network, and the normal operation of the distribution network and the detection, protection, control and distribution management in the event of an accident are realized through the second network analysis device.

[0066] like Figure 6The management layer includes two management and monitoring hosts, each of which is equipped with a switch at the power consumption end; the field equipment layer includes a load control terminal, a distributed power generation and energy storage monitoring system, and a monitoring and management system in the charging station; the load control terminal is connected to the switch at one of the power consumption ends, and the monitoring and management system in the charging station is connected to the switch at the other power consumption end; the load control terminal is collected by the corresponding switch at the power consumption end and transmitted to the third network analysis device and the monitoring host adapted thereto respectively, and the monitoring system in the charging station is also collected by the corresponding switch and the information is packaged and transmitted to the third network analysis device and the monitoring host adapted thereto respectively; in addition, the distributed power generation and energy storage monitoring system can be collected by the switch at the power consumption end of the load control terminal, or by the switch at the other power consumption end, or the switches at both power consumption ends can collect information of the distributed power generation and energy storage monitoring system, and each switch transmits the collected information to the corresponding monitoring host and the third network analysis device.

[0067] The power consumption model divides the power consumption network into the management layer and the field equipment layer. The management layer is mainly the monitoring host.

[0068] The field device layer includes:

[0069] Load control terminal, mainly including information collection of electric meters and household appliances;

[0070] Distributed power generation and energy storage monitoring systems, including batteries, distributed wind power, and distributed photovoltaics;

[0071] The monitoring and management system in the charging station mainly includes electric vehicles, charging piles, etc.

[0072] The access of new services has made the traditional power-user network unable to meet the needs. By connecting a third network analysis device at the switch at the power-user end, user information, service information, communication network, etc. can be effectively monitored and fault analyzed.

[0073] The first network analysis device is connected to the switch of the interval layer; the number of the second network analysis devices is two and each is connected to a switch at the distribution network end; the number of the third network analysis devices is each connected to a switch at the management layer. This method fills the research gap of power distribution network analysis and is conducive to coping with the increasingly complex active power distribution network. The characteristics of the data packets flowing in the increasingly complex power distribution network are analyzed, so as to fully and accurately understand one's own network system and detect the hidden dangers and risks in the power distribution network.

[0074] Figure 7 The first network analysis device, the second network analysis device, and the third network analysis device follow Figure 7The analysis process of the network analysis device in the network analysis device. The network analysis device includes IEC1588 time processing module, message diagnosis and statistics, fault record analysis module, and IEC61850. IEC1588 is used to realize the synchronous processing of network messages and the synchronous processing of power system fault data; the most important function of message diagnosis and statistics is to monitor, capture, analyze, count and store all kinds of network messages (fast messages, medium-speed messages, low-speed messages, original data messages, file transfer function messages, time synchronization messages, access control command messages, etc.) of the entire intelligent substation, and to monitor and evaluate the network communication status of the intelligent substation online; it can realize message recording and analysis, complete the calculation of power system data, and the fault record analysis module can query the corresponding message information according to the analysis results of the power system data, and conduct a comprehensive analysis of the two, which is more conducive to the analysis and location of the fault; IEC61850 is a communication module based on IEC61850. The function of the communication software module is mainly to transmit the data of the device to other monitoring or information management systems, and the data transmission protocol follows IEC61850. The process of implementing the IEC61850 communication protocol is the process of completing data modeling in accordance with the requirements of the IEC61850 standard. The IEC61850 standard is the only global universal standard in the field of power system automation. The network analysis device in the present invention analyzes the data packets passing through the switch on the basis of establishing a communication network to find hidden dangers and anomalies, analyzes and diagnoses network operation failures, counts network traffic from global to node, understands the composition of traffic applications and how they are used, and understands the operation of various application systems in the network; monitors network bandwidth utilization and automatically diagnoses network faults based on the number of connections, handshake time, number of connections, number of rejections, etc., provides fault location, captures network data packets, and detects all data transmitted on the network; the data detected by the network analysis device can be used to stress test network performance.

[0075] In addition, based on the same inventive concept, the present invention also provides a power network communication analysis system, such as Figure 2 As shown, the system includes a substation end, a distribution network end, and a power consumption end connected in sequence; wherein:

[0076] The substation end includes a station control layer, a bay layer, and a substation end process layer which are arranged in sequence;

[0077] The substation end includes a station control layer, an interval layer, and a substation end process layer which are arranged in sequence; wherein the substation end process layer includes the terminal equipment of the substation end, the interval layer is used to transmit the information of the substation end process layer to the station control layer, and the interval layer is connected to a first network analysis device, and the first network analysis device is used to perform real-time analysis on the information transmitted from the substation end process layer.

[0078] The distribution network end includes a master station layer, a feeder layer, and a distribution network process layer; wherein the distribution network process layer includes feeder terminal equipment, distribution transformer terminal equipment, and switchgear terminal equipment arranged in sequence, the feeder layer is used to connect the master station layer and the distribution network process layer, the master station layer is used to receive information transmitted from the distribution network process layer, and a second network analysis device is arranged between the master station layer and the feeder layer, and the second network analysis device is used to perform real-time analysis on the information transmitted from the distribution network process layer.

[0079] The power-consuming end includes a management layer and a field device layer; wherein the management layer is used to monitor the information transmitted by the field device layer, and a third network analysis device is set on the line connecting the field device layer and the management layer, and the third network analysis device is used to analyze the information transmitted by the field device layer in real time.

[0080] For the description of the power network communication analysis system in the embodiment of the present invention, reference may be made to the description of the embodiment of the power network communication analysis method described above, which will not be repeated here.

[0081] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, 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 disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0082] 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 flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, 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 flowchart and / or block diagram. 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.

[0083] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate 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 1A function specified in one or more boxes.

[0084] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0085] 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 method for analyzing power network communication, characterized in that: The steps include: Establishing a power distribution network architecture, wherein the power distribution network architecture includes a substation end, a distribution network end, and a power consumption end connected in sequence; The substation end is divided into a three-layer structure model, which includes a station control layer, an interval layer, and a substation end process layer arranged in sequence; wherein the substation end process layer includes the terminal equipment of the substation end, the interval layer is used to transmit the information of the substation end process layer to the station control layer, the interval layer is connected to a first network analysis device, and the first network analysis device is used to analyze the information transmitted from the substation end process layer; The distribution network end is divided into a three-layer model, which includes a master station layer, a feeder layer, and a distribution network process layer; wherein the distribution network process layer includes a feeder terminal device, a distribution transformer terminal device, and a switchgear terminal device arranged in sequence, the feeder layer is used to connect the master station layer and the distribution network process layer, the master station layer is used to receive information transmitted from the distribution network process layer, a second network analysis device is arranged between the master station layer and the feeder layer, and the second network analysis device is used to analyze the information transmitted from the distribution network process layer; The power consumption end is divided into a two-layer model, wherein the two-layer model includes a management layer and a field device layer; wherein the management layer is used to monitor the information transmitted by the field device layer, and a third network analysis device is set on the line connecting the field device layer and the management layer, and the third network analysis device is used to analyze the information transmitted by the field device layer; The network analysis devices at the substation, power consumption, and distribution network end analyze the data packets passing through their respective switches and find hidden dangers and anomalies to ensure the normal operation of the power grid; The first network analysis device is connected to the switch of the bay layer; The number of the second network analysis devices is two, and each of the second network analysis devices is connected to a switch at the distribution network end; The number of the third network analysis devices is two, and each of the third network analysis devices is connected to a switch of the management layer.

2. A method for analyzing power network communication according to claim 1, characterized in that: The substation terminal transmits information internally via a backbone optical communication network.

3. A method for analyzing power network communication according to claim 1, characterized in that: The network connecting the substation end and the distribution network end is one of medium voltage PLC, OPPC and WPLC networks.

4. A method for analyzing power network communication according to claim 1, characterized in that: The network connecting the distribution network end and the power consumption end is one of low-voltage PLC, WSN, and RS485 networks.

5. The method for analyzing power network communication according to claim 1, characterized in that: The station control layer includes a substation monitoring host, a communication server, a motion workstation, a time synchronization server, and a data server; The spacing layer includes a measurement and control device, a switch of the spacing layer, and a protection device; The substation-end process layer includes a merging unit, an intelligent terminal, an intelligent component, a mutual inductor, a circuit breaker, and a disconnector; The substation monitoring host, the communication server, the motion workstation, the time synchronization server, the data server, the measurement and control device, the switch of the interval layer, and the protection device establish information service connections with each other through the MMS network; The measurement and control device, the switch at the interval layer, the protection device, the merging unit, the intelligent terminal, the intelligent component, the mutual inductor, the circuit breaker, and the isolating switch establish information service connections with each other through the GOOSE network or the SV network.

6. A method for analyzing power network communication according to claim 5, characterized in that: The master station layer includes at least two master station monitoring hosts, the feeder layer includes distribution substations adapted to the number of master station monitoring hosts, and switches adapted to the number of master station monitoring hosts are arranged between the master station layer and the feeder layer; wherein each of the master station monitoring hosts is connected to the corresponding distribution substation via a corresponding switch at the distribution network end, information interaction is supported between the two switches at the distribution network end, and energy transfer is supported between the two distribution substations; The feeder terminal equipment is connected to one of the distribution substations, the switchgear terminal equipment is connected to another distribution substation, and the feeder terminal equipment and the switchgear terminal equipment are connected via the distribution transformer terminal equipment.

7. A method for analyzing power network communication according to claim 6, characterized in that: The management layer includes two management and monitoring hosts, each of which is configured with a switch at the power consumption end; The field equipment layer includes load control terminals, distributed power generation and energy storage monitoring systems, and charging station monitoring and management systems; The load control terminal is connected to a switch at one of the power consumption ends, and the monitoring and management system in the charging station is connected to a switch at another power consumption end; The switches at the two power consumption ends both support collecting information of the distributed power generation and energy storage monitoring system.

8. A method for analyzing power network communication according to claim 1, characterized in that: The second network analysis device analyzes the real-time network information, offline status information, grid structure parameter information, and geographic information of the distribution network process layer, and marks the abnormal data in the distribution network process layer and locates the location where the abnormal data occurs; The third network analysis device analyzes the user information, service information, and communication network information in the management layer, and performs terminal detection and fault analysis based on abnormal data obtained after the analysis.

9. A power network communication analysis system, characterized in that: It includes the substation end, distribution network end and power consumption end connected in sequence; among which: The substation end includes a station control layer, an interval layer, and a substation end process layer which are arranged in sequence; the substation end includes a station control layer, an interval layer, and a substation end process layer which are arranged in sequence; wherein the substation end process layer includes a terminal device at the substation end, the interval layer is used to transmit information of the substation end process layer to the station control layer, the interval layer is connected to a first network analysis device, and the first network analysis device is used to perform real-time analysis on information transmitted from the substation end process layer; The distribution network end includes a master station layer, a feeder layer, and a distribution network process layer; wherein the distribution network process layer includes a feeder terminal device, a distribution transformer terminal device, and a switchgear terminal device arranged in sequence, the feeder layer is used to connect the master station layer and the distribution network process layer, the master station layer is used to receive information transmitted from the distribution network process layer, a second network analysis device is arranged between the master station layer and the feeder layer, and the second network analysis device is used to perform real-time analysis on the information transmitted from the distribution network process layer; The power consumption end includes a management layer and a field device layer; wherein the management layer is used to monitor the information transmitted by the field device layer, and a third network analysis device is set on the line connecting the field device layer and the management layer, and the third network analysis device is used to analyze the information transmitted by the field device layer in real time; The network analysis devices at the substation, power consumption, and distribution network end analyze the data packets passing through their respective switches and find hidden dangers and anomalies to ensure the normal operation of the power grid; The first network analysis device is connected to the switch of the bay layer; The number of the second network analysis devices is two, and each of the second network analysis devices is connected to a switch at the distribution network end; The number of the third network analysis devices is two, and each of the third network analysis devices is connected to a switch of the management layer.

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