CN109713791B - Diagnosis method for abnormality of smart grid remote control command - Google Patents

Abstract

The invention relates to a method for diagnosing remote control command abnormity of an intelligent power grid, and belongs to the technical field of digital information transmission. The method comprises the steps of establishing a protocol information matching rule table of a remote control command transmission process among communication layers of a power grid, establishing a corresponding transmission process queue table, comparing a message monitored in real time with the matching rule table, extracting protocol information conforming to the message of the rule table to generate information of a remote control step, summarizing the information of the remote control step, comparing the summarized information with the matching rule table again, and storing the information of the remote control step into the transmission process queue table; then the information of all remote control steps is formed into the whole transmission process information of the remote control command; when a message containing failure information appears in a monitoring remote control command, the information of the whole transmission process of the remote control command is searched, the remote control step corresponding to the message, two adjacent communication layers associated with the remote control step and associated fault equipment are found, and therefore diagnosis is completed.

Description

Diagnosis method for abnormality of smart grid remote control command

technical field

The invention relates to a method for diagnosing abnormal remote control commands of a smart grid, and belongs to the technical field of digital information transmission.

Background technique

With the continuous advancement of smart grid construction, the construction of intelligent substations and smart grid control technical support systems have been completed one after another, providing important technical support for the integrated construction of regional dispatch and control of the "big operation" of regional power grids. In the power system, the dispatching master station executes a remote control command for components such as switches or switches, which is sent to the dispatching network through the front-end regulation, and multiple gateway machines (multiple regional dispatching substations) linked to the dispatching network receive the command from the dispatching network. After receiving the remote control command, it is transmitted to the measurement and control device and the intelligent terminal, and finally controls the equipment terminal (knife switch or switch) to perform actions. The remote control command starts from the dispatching master station and passes through multiple communication layers such as the control front, dispatching network, gateway machine, measurement and control device, and intelligent terminal. Each step of transmission between the communication layers is called a remote control step, and all remote control steps are called Remote control process, so the remote control process consists of multiple remote control steps, including selection request, selection response, operation request, operation response, tripping (closing), position information, etc. These remote control steps are based on remote control commands through the network in the form of messages For layer-by-layer communication transmission. The protocol standards followed by the network messages of each communication layer are different. For example, the communication between the control front-end and the dispatching network and the dispatching network to the gateway is 104 messages, and the communication between the gateway and the measurement and control device is MMS. Message, the communication between the measurement and control device and the smart terminal is a GOOSE message.

Massive 104, MMS, GOOSE and other data or messages are received and sent all the time between the above communication layers, especially in the case of multiple gateways connected to the dispatching network, the message data is even larger, The same remote control command is scattered and out of order among the messages of different communication layers, and it is impossible to clearly express which remote control step belongs to which remote control process; because the semantics in the messages of each layer are different, the current method is Extracting the messages of each layer and analyzing them separately is not only a heavy workload, but also cannot obtain the interactive data of power grid regulation in a timely and comprehensive manner. In particular, once the remote control command is abnormal (failed or lost), it cannot be traced back, so that the corresponding fault point and faulty device cannot be found.

Contents of the invention

The technical problem to be solved by the present invention is to quickly and effectively diagnose the abnormality of the remote control command of the smart grid, so as to provide strong support for the regulation and control of the grid.

The technical solution proposed by the present invention to solve the above technical problems is: a method for diagnosing the abnormality of the remote control command of the smart grid. Layer, the remote control command is issued by the dispatching master station and transmitted among the five communication layers sequentially with messages of three protocols: 104, MMS and GOOOSE; the messages are obtained in real time by the electric power communication protocol detector, The message monitored at the four communication layers of the scheduling network layer, the station control layer, the interval layer and the process layer is the first message. Said message is the second message; perform the following steps:

1) Establish a protocol information matching rule table for the entire process of transmitting the remote control command between the five communication layers according to the correspondence between the three protocols of the remote control command, the matching rule table includes the Remotely command the corresponding protocol information in the five communication layers and form a protocol information entry;

2) according to the matching rule table and its statute information entries, establish the transmission whole-process queue table of the remote control command at the five communication layers of the control front layer, dispatching network layer, station control layer, interval layer and process layer, Set up the first transmission process queue table of the remote control command at the four communication layers of the dispatching network layer, the station control layer, the interval layer and the process layer, and set up the remote control command at the second layer of the control front layer and the dispatching network layer The second transmission process queue table of a communication layer;

3) filtering and classifying the message according to the three protocols, and extracting the protocol information of the message after performing syntax and semantic analysis;

4) comparing the statute information of the first message and the second message with the statute information entry of the matching rule table, and if the statute information entry matches the statute information entry, the first message or the second message A one-way transmission of the two messages between its corresponding communication layers is used as a qualified remote control step, and the protocol information of the first message or the second message is extracted and stored in the first transmission process queue table or the second message. Transmitting the information in the process queue table as the remote control step, otherwise discarding the message;

5) After summarizing the information of the remote control step, compare it again with the protocol information entry of the matching rule table, if the protocol information contained in the information of the remote control step matches the protocol information entry, store it in the transmission In the queue list of the whole process, otherwise discard the information of the remote control step;

6) sort the information of each remote control step in the queue table of the whole transmission process according to time, and calculate the time interval between the information of the first remote control step and the information of the last remote control step, if the time interval exceeds Set the time, then extract the information of each remote control step in the queue table of the whole transmission process to form the whole process information of the transmission of the remote control command, store and display it;

7) When a message containing failure information appears during the monitoring of the remote control command, the remote control step corresponding to the message is found by searching the entire transmission process information of the remote control command, and then the remote control step corresponding to the remote control step is found according to the information of the remote control step. The associated two adjacent communication layers are finally located to the faulty equipment associated with the two adjacent communication layers to complete the diagnosis.

Further, the protocol information entry is a queue formed by arranging the protocol information of the corresponding relationship between the remote control command and the communication layer in the matching rule, the first transmission process queue table, the second transmission process queue table and The entire transmission process queue table is an empty table completely corresponding to the rows and columns of the matching rule table.

Further, the set time range is 5-30 seconds.

Further, the matching rule table is a semantic association table of different protocols.

Further, the message is a 104 message from the control front layer to the dispatching network layer, a 104 message from the dispatching network layer to the station control layer, and a 104 message from the station control layer to the interval layer The MMS message and the GOOSE message from the interval layer to the process layer.

The beneficial effect of the present invention is: owing to form the matching rule table of correspondence relation by the different protocol of remote control command between different communication layers, and establish the whole process queue table of all remote control command according to the entry of matching rule table, will pass existing The power communication protocol detector captures different protocol messages formed by remote control commands in different communication layers in real time, classifies and analyzes and extracts the protocol information, and extracts the protocol information of the messages that match the matching rule table to form the information of the remote control step and store it in the first, The second transmission queue table, and then compare the information of the remote control steps with the matching rule table for the second time, and then store the information of the remote control steps matching the protocol information with the matching rule table in the queue table of the whole transmission process , and finally establish and save the transmission process information of the remote control command transmitted in time series between different communication layers after it is sent from the dispatching master station; It is easy to quickly find the corresponding communication layer transmission location through the established remote control command to transmit the information of the whole process, so as to find the faulty device at the specific communication layer and complete the diagnosis. In turn, it provides rapid and effective help for fault clearing. It not only realizes the whole-process closed-loop monitoring management and analysis of remote control commands, but also quickly eliminates equipment faults, thereby providing strong support for further power grid regulation and control.

Description of drawings

The method for diagnosing abnormal smart grid remote control commands of the present invention will be further described below in conjunction with the accompanying drawings.

FIG. 1 is a schematic diagram of a remote control command transmission process in an embodiment of the present invention.

FIG. 2 is a schematic diagram of an abnormality in the transmission process of the remote control command in FIG. 1 .

Detailed ways

Example

In the method for diagnosing the abnormality of the remote control command of the smart grid in this embodiment, the communication of the smart substation is divided into five layers of communication layers: the pre-regulation layer, the dispatching network layer, the station control layer, the interval layer, and the process layer. The communication layer transmits messages formed by different protocols. The specific messages include: 104 messages from the control front layer to the dispatching network layer, 104 messages from the dispatching network layer to the station control layer, and MMS from the station control layer to the interval layer. Messages and GOOSE messages from the interval layer to the process layer, the messages are obtained in real time through the power communication protocol detector. As shown in Figure 1, the specific monitoring method implementation steps are as follows:

1) According to the corresponding relationship between remote control commands among the three protocols, establish a protocol information matching rule table for the whole process of remote control command transmission among the five communication layers. The matching rule table is shown in Table 1 below:

Table 1

Table 1 is an extract of four remote control commands of a smart substation in Nanjing, namely Baixin 4R74 switch synchronization, Shishi 24F2 switch synchronization, 1# main transformer 220kV switch on and off, and Xingao 1999 switch on and off. Each remote control command forms the corresponding protocol information corresponding to the five-layer communication layer between the control pre-layer, dispatching network layer, station control layer, interval layer and process layer, and arranges in the matching rule table to form a protocol information entry (i.e. The rows and columns in the rule table, for example, an entry formed by the first row and each column in Table 1 is: Baixin 4R74kai-24577-CL2201CTRL/CBSynCSW-CL2201CTRL/LLN0$BR-001A:1/001A:1/00B1:3) , so as to establish the protocol information matching rule table for the whole process of these four remote control commands being transmitted between the five communication layers.

2) According to the matching rule table and its statute information entries, establish the transmission whole process queue table of these four remote control commands in the five communication layers of control front layer, dispatching network layer, station control layer, interval layer and process layer, and establish this The four remote control commands are in the first transmission process queue table of the four communication layers of the dispatching network layer, the station control layer, the interval layer and the process layer, and these four remote control commands are established in the two communication layers of the control front layer and the dispatching network layer. The second transmission process queue table, the first transmission process queue table, the second transmission process queue table and the entire transmission process queue table are empty tables completely corresponding to the rows and columns of the matching rule table.

3) Filter and classify each monitored message according to three protocols, and extract the protocol information of each message after performing syntax and semantic analysis. For example, for the 104 message, extract the 104 remote point number as the protocol information, for the MMS message, extract the MMS reference as the protocol information, and for the GOOSE message, extract the GOOSE virtual terminal as the protocol information.

4) compare the statute information of each message of the first message and the second message with the statute information entry of the matching rule table, if the statute information of the message matches the statute information entry, then the message ( A one-way transmission judgment between the first message or the second message) between its corresponding communication layers is regarded as a qualified remote control step, and the protocol information of the message (the first message or the second message) is extracted and stored in Information in the first transmission process queue table or the second transmission process queue table as the remote control step, otherwise the message (the first message or the second message) is discarded.

For example: the power communication protocol detector detects an MMS message from the station control layer to the interval layer in real time, and compares the protocol information entries in the matching rule table. If it matches, it can be judged that this is a transfer from the station control layer to the interval layer. The qualified remote control step extracts the protocol information of the control reference ykdesc and the report reference ykref in the MMS message and stores them in the queue table of the second transmission process as the information of the qualified remote control step.

5) After summarizing the information of the remote control step generated in step 4) and comparing it with the protocol information entry in the matching rule table again, if the protocol information contained in the information of the remote control step matches the protocol information entry, it is stored in the queue table of the whole transmission process , otherwise discard the information of the remote control step;

6) sort the information of each remote control step in the queue table of the whole process according to time, calculate the time interval between the information of the first remote control step and the information of the last remote control step, if the time interval exceeds the set time, Then extract the information of each remote control step in the queue table of the whole process of transmission to form the information of the whole process of transmission of the remote control command, store and display it.

7) When a message containing failure information appears during monitoring of a certain remote control command, the remote control step corresponding to the message can be found by searching the entire transmission process information of the remote control command, and then the remote control step associated with the remote control step can be found according to the information of the remote control step. The two adjacent communication layers, and finally locate the faulty equipment associated with the two adjacent communication layers, and complete the diagnosis.

For example: when a message containing "MMS operation response, failure" appears, by searching the transmission process information of the established remote control command, it is found that "MMS operation response" corresponds to the remote control step between the station control layer and the interval layer (Confirm the specific remote control steps by specifically searching the information of the remote control steps corresponding to the MMS operation response in the information of each remote control step), that is, the gateway machine receives the message of "MMS operation response, failure" information from the measurement and control device, and then It is judged that the abnormality of the remote control command is caused by the failure of the measurement and control device, so as to provide powerful help for further troubleshooting the failure of the measurement and control device.

In this embodiment, generally speaking, the set time range is 5-30 seconds; the matching rule table is a semantic association table formed by associating the semantics of different protocols.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and all equivalent replacements or changes according to the technical solutions of the present invention and the concept of the present invention should be covered by the protection scope of the present invention within.

Claims (5)

1. A diagnostic method for the abnormity of a remote control command of an intelligent power grid is disclosed, wherein the intelligent power grid comprises five communication layers of a regulation and control preposition layer, a scheduling network layer, a station control layer, a spacing layer and a process layer, the remote control command is sent by a scheduling master station and is transmitted among the five communication layers in sequence by messages of three protocols of 104, MMS and GOOSE; the messages are obtained in real time through a power communication protocol detector, the messages monitored in the four communication layers of the scheduling network layer, the station control layer, the spacer layer and the process layer are first messages, and the messages monitored in the two communication layers of the regulation and control front layer and the scheduling network layer are second messages; the method is characterized by comprising the following steps:

1) Establishing a protocol information matching rule table of the whole process of transmitting the remote control command between the five communication layers according to the corresponding relation of the remote control command between the three protocols, wherein the matching rule table comprises corresponding protocol information of the remote control command on the five communication layers and forms protocol information items;

2) Establishing transmission whole process queue lists of the remote control commands in five communication layers of the regulation and control preposition layer, the scheduling network layer, the station control layer, the spacing layer and the process layer according to the matching rule table and protocol information items thereof, establishing first transmission process queue lists of the remote control commands in four communication layers of the scheduling network layer, the station control layer, the spacing layer and the process layer, and establishing second transmission process queue lists of the remote control commands in two communication layers of the regulation and control preposition layer and the scheduling network layer;

3) Filtering and classifying the messages according to the three protocols, and extracting protocol information of the messages after syntactic and semantic analysis;

4) Comparing the protocol information of the first message and the second message with the protocol information items of the matching rule table respectively, if the protocol information items are matched with the protocol information items, taking one-way transmission of the first message or the second message between corresponding communication layers as a qualified remote control step, extracting the protocol information of the first message or the second message, storing the protocol information into the first transmission process queue list or the second transmission process queue list as the information of the remote control step, and if not, discarding the message;

5) Summarizing the information of the remote control step, comparing the information with the protocol information items of the matching rule table again, if protocol information contained in the information of the remote control step is matched with the protocol information items, storing the information into the transmission whole-process queue list, otherwise, discarding the information of the remote control step;

6) Sorting the information of each remote control step in the transmission whole-process queue list according to time, calculating the time interval from the information of the first remote control step to the information of the last remote control step, and if the time interval exceeds the set time, extracting the information of each remote control step in the transmission whole-process queue list to form the transmission whole-process information of the remote control command, and storing and displaying the transmission whole-process information;

7) When the remote control command is monitored to generate a message containing failure information, a remote control step corresponding to the message is found by searching the whole transmission process information of the remote control command, two adjacent communication layers associated with the remote control step are found according to the information of the remote control step, and finally, the fault equipment associated with the two adjacent communication layers is positioned to complete diagnosis.

2. The method for diagnosing the abnormality of the remote control command of the smart grid according to claim 1, wherein: the protocol information entry is a row and column formed by arranging the protocol information of the corresponding relation of the remote control command in the communication layer in the matching rule table, and the first transmission process queue table, the second transmission process queue table and the transmission whole process queue table are all empty tables completely corresponding to the row and column of the matching rule table.

3. The smart grid remote control command abnormality diagnosis method according to claim 1 or 2, characterized in that: the set time range is 5-30 seconds.

4. The smart grid remote control command abnormality diagnosis method according to claim 1 or 2, characterized in that: the matching rule table is a semantic association table of different conventions.

5. The smart grid remote control command abnormality diagnosis method according to claim 1 or 2, characterized in that: the messages are 104 messages from the regulation and control front layer to the scheduling network layer, 104 messages from the scheduling network layer to the station control layer, MMS messages from the station control layer to the spacing layer and GOOSE messages from the spacing layer to the process layer.

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