A station communication private network system based on power line carrier and interaction method

Abstract

The present invention relates to the technical field of power line carrier communication, and discloses a dedicated network system for in-station communication based on power line carrier and an interactive method. The dedicated network system includes a rack-mounted management machine, a distribution network / collection master station, a carrier communication host, a carrier communication slave, a terminal device, and a coupler, and includes the following steps: step 1, power on and time calibration; step 2, request login; step 3, request detection; step 4, report the detection result; step 5, report the request for networking; step 6, report the handover networking frequency band; step 7, report the switching networking frequency band; step 8, wait for the main management board command. Through the interactive communication between the main management board and the slave management board of the rack-mounted management machine, unified management of each line of the substation is achieved, and the networking frequency band used by each line is uniformly allocated, so as to avoid the problem of mutual interference between multiple lines when networking at the same time, so that multiple lines of the substation can be networked and operated normally under limited frequency band conditions, and the stability of power communication is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of power line carrier communication, and in particular to a communication system and an interaction method applied to a power line carrier of a substation. Background Art

[0002] In order to meet the communication needs in areas without signals or where optical fiber cannot be laid, power lines are used as information transmission media to achieve communication and data transmission functions without re-establishing the network. The traditional single-line power line carrier communication solution adopts a master / slave carrier communication method. A management machine is configured on the upstream side of the master carrier, which is responsible for receiving data sent by the master station, dispatching the master carrier to initiate communication with the slave carrier, and the slave carrier responds after receiving the command from the master carrier, or continues to transmit downward as a relay. This communication method allows only one sending device on the line, and there is no communication interference problem caused by using the same communication frequency band between devices. In the substation communication line, there are often multiple lines, and multiple lines have a common bus. The traditional single-line independent dispatching communication working mode is not suitable for this scenario. In the in-station communication solution, multiple lines are connected by a bus. During operation, interference problems of communications in the same frequency band will occur, resulting in a decrease in the communication success rate. Summary of the invention

[0003] The present invention aims at the deficiencies and defects of the traditional single-line communication scheme, and discloses a dedicated network system for in-station communication based on power line carrier and an interactive method. The present invention manages the substation lines in a unified manner through a rack-type management machine, uniformly allocates the networking frequency bands used by each line, realizes the simultaneous networking of multiple lines, ensures that each line operates in the optimal working frequency band, improves the operating stability of multiple lines, and avoids the problem of mutual interference when multiple lines are running simultaneously.

[0004] A dedicated network system for in-station communication based on power line carrier, including a distribution network / collection master station (hereinafter referred to as the master station), a rack-mounted management machine, a carrier host, a carrier slave, a coupler, a terminal device, etc. Among them:

[0005] Furthermore, the rack-mounted management machine includes a main board and a slave board, which are responsible for the carrier communication equipment networking scheduling and information interaction. The slave board is connected to the host through a network cable and connected to the carrier host through an optical fiber.

[0006] Furthermore, the main board card is the client, the slave board card is the server, the main board card and the slave board card are connected through a network port, the message sent from the slave board card to the main board card is an uplink message, and the message sent from the main board card to the slave board card is a downlink message; wherein, the slave board card is connected to the line carrier host, responsible for scheduling the communication between the carrier host and the carrier slave, and the main board card is responsible for scheduling the communication frequency band used by the line.

[0007] Furthermore, the carrier host is connected to the coupler through a carrier line and communicates with the carrier slave through the coupler. The carrier slave is connected to the terminal device through a serial line or a network cable. The terminal device realizes information exchange with the master station through the slave board, the carrier host, and the carrier slave.

[0008] Furthermore, the slave board completes the acquisition of the line networking frequency band responsible for the slave board by powering on and calibrating time, requesting login, requesting detection, reporting detection results, reporting requesting networking, reporting handing over networking frequency bands, reporting switching networking frequency bands, and waiting for the main board command to complete the acquisition and completion of line networking communication. Among them, requesting detection is to apply for an idle frequency band from the slave board to the main board and detect the communication success rate of the sub-card using the frequency band, and requesting networking is to apply for a networking frequency band from the slave board to the main board and start the line networking operation of the slave board.

[0009] A method for in-station communication private network interaction based on power line carrier, specifically including the following contents:

[0010] Electrical time calibration on the slave card: The slave card sends a time calibration request to the main card, so that the main card can reply with clock information and calibrate the slave card;

[0011] Log in from the board to the main board: send login information from the board to the main board and get a reply from the main board;

[0012] The slave card sends a detection request or a networking request to the master card based on whether the direct copy networking frequency band information is stored:

[0013] When sending a detection request, the main card replies with the frequency band information to the slave card, so that the slave card can detect and report the detection result to the main card, and the main card allocates the detection frequency band to the slave card according to the detection result and the frequency band information of each line;

[0014] When sending a networking request, the slave card adds the networking frequency band information to the uplink message, and the master card distributes the networking frequency band information to the slave card according to the frequency band information of each line;

[0015] Determine whether the slave board meets the network frequency band submission conditions;

[0016] Hand over the networking frequency band from the board to the main board;

[0017] Determine whether the slave board has successfully handed over the networking frequency band;

[0018] Determine whether the slave board needs to switch the networking frequency band;

[0019] The slave card reports the switching networking frequency band to the master card, and the master card reallocates the networking frequency band information to the slave card according to the frequency band information of each line.

[0020] Furthermore, when the slave board sends a detection request and the main board replies with frequency band information to the slave board, if the frequency band information is being used for detection by other slave boards, the main board replies to the slave board to wait for the detection command until the use of other slave boards is finished; if the frequency band information is being used for networking by other slave board lines, the main board requests the slave board to join the frequency band usage queue and replies to the slave board to wait for the main board to send the detection frequency band information; if the frequency band information does not have a detectable frequency band, the main board replies to the slave board that the detection is finished.

[0021] Furthermore, when the main board card allocates networking frequency band information to the slave board card, if the networking frequency band is not used by the line, the main board card replies to the slave board card to start networking operation, and the slave board card enters the networking operation state; if the networking frequency band is used for frequency band detection, the main board card replies to the slave board card waiting for networking, and the slave board card enters the waiting state for networking; if the networking frequency band is used for networking by the line, the main board card's request is added to the frequency band usage queue from the slave board, and the slave board is replied to waiting for the main board card to send the networking frequency band information.

[0022] Furthermore, judging whether the slave board has successfully handed over the networking frequency band includes the following:

[0023] If the frequency band usage queue corresponding to the reported networking frequency band only contains the reported slave board, a reply of submission failure is sent to the slave board; otherwise, a reply of submission success is sent to the slave board, and a slave board is selected from the frequency band usage queue according to the queue order to send the networking / detection frequency band information.

[0024] Furthermore, when the handover is successful, the slave board stops using the reported networking frequency band and waits for the main board to send the networking frequency band information; when the handover fails, the frequency band handover time is updated and the slave board continues to use the networking frequency band for networking operation.

[0025] Furthermore, the network frequency band is switched by sending a request for switching the network frequency band from the board to the main board, and obtaining the switched network frequency band:

[0026] If the networking frequency band is not used by other lines, reply "Start networking" to request the slave board, the slave board enters the networking operation state, and re-judges whether the slave board meets the networking frequency band submission conditions; if the networking frequency band is used by other lines for frequency band detection, reply "Wait for networking" to request the slave board, the slave board enters the waiting for networking state, and sends a networking request to the main board after the waiting time ends; if the networking frequency band is used for networking by other slave boards, the request management board is added to the frequency band usage queue, waiting for the main board to send the networking frequency band information.

[0027] The beneficial effects of the present invention are as follows: a power line carrier-based in-station communication private network system and an interaction method are disclosed, which realizes unified management of various lines of the substation through the rack-mounted management machine main board and slave board information interaction, and uniformly allocates the networking frequency bands used by various lines, further realizes simultaneous networking of multiple lines, ensures that each line operates in the optimal working frequency band, improves the stability of multi-line networking, avoids mutual interference problems in simultaneous networking of multiple lines, enables multiple lines of the substation to be networked and operated normally under limited frequency band conditions, and ensures the stability of power communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The overall architecture of the dedicated network system for in-station communications.

[0029] Figure 2 The method of in-station communication private network interaction starts from the process of powering on the board and establishing the network.

[0030] Figure 3 Frequency band detection process for inbound communication private network interaction method.

[0031] Figure 4 The networking application process for the dedicated network interaction method for in-station communication.

[0032] Figure 5 The in-station communication private network interaction method networking operation event triggering process.

[0033] Figure 6 The station communication private network system changes from the board card status. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the present invention.

[0035] like Figure 1 As shown, a dedicated network system for in-station communication based on power line carrier is shown. The carrier host communicates with the communication slave through the carrier line. The carrier slave is connected to the terminal device through a serial port line or a network cable. The terminal device realizes information exchange with the main station through the management machine, the carrier host and the carrier slave.

[0036] A method for in-station communication dedicated network interaction based on power line carrier, wherein a rack-mounted management machine is responsible for carrier communication equipment networking scheduling and information interaction with a main station.

[0037] like Figure 2 As shown, the networking scheduling interaction process includes the following steps.

[0038] Step 1: The slave card sends a time calibration request to the main card. After receiving the request, the main card obtains the clock information and replies the clock information to the slave card. The slave card receives the clock information and performs clock calibration, and then proceeds to step 2.

[0039] like Figure 6 As shown, after receiving the clock information from the board and completing the time calibration, it enters the waiting for login state.

[0040] Step 2: Determine whether the login conditions are met from the board, including whether the carrier communication protocol type conforms to the rack management machine protocol, whether the board and carrier host are connected, and whether the carrier slave file has been established from the board. If so, send login information to the main board and jump to step 3. Otherwise, stay in step 2 and continue to judge the login conditions.

[0041] Step 3: The slave board sends a login application to the main board. The main board replies to the slave board according to the file information of the slave board. If the line file responsible for the slave board is valid, it replies with login confirmation information to the slave board, otherwise it replies with denial. When the slave board receives the confirmation reply from the main board, it jumps to step 4, otherwise it stays at step 3, waits for one minute, and continues to send the login application.

[0042] like Figure 6 As shown, the system enters the logged-in state after receiving the login confirmation from the board.

[0043] Step 4: The slave card sends a detection request or networking request to the master card based on whether the direct copy networking frequency band information is stored. If there is no networking frequency band information, jump to step 5 and make a detection frequency band request, such as Figure 6 As shown, the board enters the detection request state; if there is networking frequency band information, jump to step 7 to apply for networking, such as Figure 6 As shown, the board enters the networking application state.

[0044] Step 5: The slave card sends a detection request to the main card, and the main card responds to the slave card based on the frequency band information used by each line, such as Figure 3 shown.

[0045] If there is an available detection frequency band, the detection frequency band information is replied to the slave board. After the slave board receives the detection frequency band information, the frequency band detection phase is carried out. Figure 6 As shown in the figure, the slave board enters the detection state. After the frequency band detection is completed, jump to step 5 and enter the detection request. If the detection frequency band is being used for detection by other slave board lines, the slave board will reply to the detection waiting. After the slave board receives the waiting information, Figure 6 Enter the detection waiting state as shown, wait for ten seconds and then jump to step five to enter the detection request; if the detection frequency band is being used by other slave card lines for networking, reply to the slave card to wait for the main card command, such as Figure 6As shown in FIG. 1 , when the slave board receives the command from the main board, it jumps to step nine and enters the state of waiting for the main card command; if there is no available detection frequency band, the slave board replies that the detection phase is over, and the slave board receives the detection phase is over, such as Figure 6 The system enters the state of reporting detection results and jumps to step 6.

[0046] Step 5 is described in conjunction with a specific embodiment. It is assumed that there are three frequency bands in the rack management machine, namely , and , there are 3 valid slave boards , and , from the board Use frequency band Network operation, from the board Use frequency band Perform frequency band detection from the board Send a detection request to the main board, and the main board combines the frequency band information used by the line to send a detection request to the slave board. Reply to the frequency band used Probe; from the board Complete frequency band After detection, continue to apply for detection frequency band from the main board, and give it to the slave board based on the line frequency band information. Reply to the detection wait, wait for ten seconds and then initiate the detection request again. During the waiting process, Frequency Band After the detection, the main board sends the signal to the slave board. Reply to the frequency band used Probe; from the board Complete frequency band After detection, continue to apply for detection frequency band from the main board, and give it to the slave board based on the line frequency band information. Reply to wait for the main board card command and send the Join Band Using the queue, from the board Upward network frequency band After that, the main board gives the slave board Send detection frequency band ; From the board Complete frequency band After detection, continue to apply for detection frequency band from the main board, and give it to the slave board based on the line frequency band information. Reply frequency band detection is completed, from the board After receiving the frequency band detection end reply, the frequency band detection result is reported.

[0047] Step 6: The slave card reports the detection result to the master card based on the frequency band detection information. After receiving the reported detection result, the master card stores the frequency band detection result information of the slave card and replies to the slave card for confirmation. After receiving the confirmation information, the slave card jumps to step 7. Figure 6 As shown, after receiving the confirmation reply of the reported detection result from the board, the state jumps to the networking application state.

[0048] Step 7: The slave card sends a networking application to the management card based on the stored networking frequency band information, such as Figure 4 If there is networking frequency band information, it is added to the uplink message; if not, the main board is requested to allocate the networking frequency band according to the reported frequency band detection result.

[0049] The main board receives the networking application from the slave board and determines whether it carries the networking frequency band information. If so, it replies to the slave board according to the frequency band information of each line. If not, it allocates the networking frequency band to the slave board according to the frequency band detection result reported by the slave board and the frequency band information of each line.

[0050] If the network frequency band required by the slave board is not used by other lines, the slave board will reply to start the network, such as Figure 6 As shown in the figure, the slave board enters the networking operation state and jumps to step 8; if the frequency band is used by other lines for frequency band detection, the slave board will reply to the networking waiting state. After the slave board receives the waiting information, Figure 6 As shown, the slave board enters the waiting state for networking, and after waiting for ten seconds, jumps to step 7; if the frequency band is used for networking by other lines, the line is added to the frequency band usage queue, and the slave board is replied to wait for the main board command, such as Figure 6 As shown, after receiving the command from the board, it enters the state of waiting for the command from the main card and jumps to step nine.

[0051] Step 7 is described in conjunction with a specific embodiment. It is assumed that there are three frequency bands in the rack management machine, namely , and , there are 3 valid slave boards , and , from the board Use frequency band Network operation, from the board Use frequency band Perform frequency band detection from the board After completing the detection result report, send a network request to the main board. If the main board The reported frequency band detection results and frequency band information of each line are given to the slave card Allocate network frequency band , the main board gives the slave board Reply to use the networking frequency band Start networking; if the main board is based on the slave board The reported frequency band detection results and frequency band information of each line are given to the slave card Allocate network frequency band , the main board gives the slave board Reply to network waiting, wait for ten seconds and then initiate network request again. During the waiting process, Frequency Band After the detection, the main board sends the signal to the slave board. Reply to the frequency band used Start networking; if the main board is based on the slave board The reported frequency band detection results and frequency band information of each line are given to the slave card Allocate network frequency band , to the slave board Reply to wait for the main board card command and send the Join Band Using the queue, from the board Upward network frequency band After that, the main board gives the slave board Send networking frequency band Enable networking.

[0052] Step 8: Determine whether the slave card meets the conditions for handing over the networking frequency band. If so, the line stops using the networking frequency band and reports the handing over networking frequency band to the master card. If not, repeat step 8. Figure 5 shown.

[0053] If the frequency band usage queue corresponding to the reported networking frequency band only contains the reported slave board, a reply of submission failure is sent to the slave board; otherwise, a reply of submission success is sent to the slave board, and a slave board is selected from the frequency band usage queue according to the queue order to send the networking / detection frequency band information.

[0054] The slave board receives a reply from the main board that the submission is successful, enters the waiting state for the main board command, and jumps to step nine; receives a reply that the submission fails, updates the frequency band submission time, and the slave board continues to use the networking frequency band for networking operation, enters the networking operation state, and repeats step eight.

[0055] If the slave card fails to go online and needs to switch the networking frequency band, the slave card reports to the main card, enters the frequency band switching state, and jumps to step 10. Figure 5 shown.

[0056] Step 9: Wait for the main board to send the networking / detection frequency band information. Figure 6As shown, the slave board is in the state of waiting for the master card command. If the network frequency band information is received from the main board, it will jump to step eight and the slave board will enter the networking operation state; if the detection frequency band information is received from the main board, it will jump to step five and the slave board will enter the frequency band detection state.

[0057] Step 10: Figure 6 As shown, the slave board reports to the main board in the frequency band switching state to apply for switching the frequency band. If the networking frequency band is not used by other lines, the slave board replies to the request to start networking, the slave board enters the networking running state, and jumps to step eight; if the frequency band is used by other lines for frequency band detection, the slave board enters the waiting state for networking, and jumps to step seven; if the frequency band is used by other lines for networking, the line is added to the frequency band use queue, the slave board is replied to wait for the main board command, the slave board is waiting for the main card command state, and jumps to step nine.

[0058] Through the above steps, the rack management machine allocates networking frequency bands for each line. Each slave card performs networking operation of each line according to the networking frequency band allocated by the master card, meeting the communication needs of the power field such as power distribution automation control in signal-free areas and data collection and reporting.

[0059] The above embodiments are descriptions of specific implementation methods of the present invention rather than limitations of the present invention. Technical personnel in the relevant technical field can make various changes and modifications to obtain corresponding equivalent technical solutions without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should be included in the patent protection scope of the present invention.

Claims

1. A dedicated network system for in-station communication based on power line carrier, including a rack-mounted management machine, a distribution network / collection master station, a carrier communication host, a carrier communication slave, a terminal device, and a coupler, characterized in that: The rack-mounted management machine includes a master management board and a slave management board; The slave management board is connected to the carrier communication host through optical fiber, responsible for scheduling the communication between the carrier communication host and the carrier communication slave, and performing information exchange; The master management board communicates with the slave management boards and is responsible for the centralized scheduling of the networking frequency bands of multiple slave management boards; The carrier communication host is connected to the coupler through a carrier line and communicates with the carrier communication slave through the coupler. The carrier communication slave is connected to the terminal device through a serial port line or a network cable. The terminal device realizes information interaction with the distribution network / collection master station through the management board, the carrier communication host, and the carrier communication slave.

2. According to claim 1, a power line carrier-based inbound communication private network system is characterized in that: The centralized scheduling of the networking frequency bands of the multiple slave management boards, the slave management boards interact with the main management board by powering on and calibrating time, requesting login, requesting detection, reporting detection results, reporting networking requests, reporting networking frequency bands, reporting switching networking frequency bands, and waiting for commands from the main management board. The main management board allocates networking frequency bands to the multiple slave management boards based on the interaction results of the multiple slave management boards, completes the acquisition of networking frequency bands for the lines that the multiple slave management boards are responsible for, and completes the line networking communication.

3. A method for inbound communication private network interaction based on power line carrier, characterized in that: The master management board is connected to multiple slave management boards. The slave management board is responsible for scheduling the communication between the carrier communication host and the carrier communication slave. The master management board is responsible for the centralized scheduling of the networking frequency bands of multiple slave management boards. The interaction method includes: The slave management board is powered on to request the master management board to calibrate the time; Log in from the management board to the main management board; The slave management board sends a frequency band detection request or a networking request to the master management board based on whether the direct copy networking frequency band information is stored: When sending a frequency band detection request, the master management board replies the frequency band information to the slave management board, so that the slave management board performs detection and reports the detection result to the master management board. The master management board allocates the detection frequency band to the slave management board according to the detection result and the networking frequency band information of the line that other slave management boards are responsible for; When sending a networking request, the slave management board adds the networking frequency band information to the uplink message, and the master management board allocates the networking frequency band information to the slave management boards according to the networking frequency band information of the lines that other slave management boards are responsible for; Determine whether the slave management board meets the conditions for handing over the networking frequency band; Hand over the networking frequency band from the management board to the main management board; Determine whether the network frequency band is successfully handed over from the management board; Determine whether the network frequency band needs to be switched from the management board; The slave management board reports the switching networking frequency band to the master management board, and the master management board reallocates the networking frequency band information to the slave management board according to the frequency band information of each line.

4. The method for inbound communication private network interaction based on power line carrier according to claim 3 is characterized in that: When the slave management board sends a detection request and the master management board replies with frequency band information to the slave management board, if the frequency band information is being used for detection by other slave management boards, the master management board replies to the slave management board to wait for commands until the other slave management boards finish using it; if the frequency band information is being used for networking by other slave management board lines, wait for the master management board to send the detection frequency band information; if the frequency band information does not contain a detectable frequency band, the master management board replies to the slave management board that the detection is over.

5. The method for inbound communication private network interaction based on power line carrier according to claim 3 is characterized in that: When the master management board allocates networking frequency band information to the slave management board, if the networking frequency band is not used by the slave management board, the slave management board is requested to enter the networking running state; if the networking frequency band is used for frequency band detection, the slave management board is requested to enter the waiting networking state; If the networking frequency band is used by the slave management board for networking, the request is added to the frequency band use queue by the slave management board, waiting for the master management board to send the networking frequency band information.

6. The method for inbound communication private network interaction based on power line carrier according to claim 3 is characterized in that: The following are the steps to determine whether the network frequency band has been successfully handed over from the management board: If the frequency band usage queue corresponding to the reported networking frequency band only contains the reported slave management board, a reply of submission failure is sent to the slave management board; otherwise, a reply of submission success is sent to the slave management board, and a slave management board is selected from the frequency band usage queue according to the queue order to send the networking or detection frequency band information.

7. The method for inbound communication private network interaction based on power line carrier according to claim 6 is characterized in that: When the handover is successful, the slave management board stops using the reported networking frequency band and waits for the master management board to send down the networking frequency band information; when the handover fails, the frequency band handover time is updated and the slave management board continues to use the networking frequency band for networking operation.

8. The method for inbound communication private network interaction based on power line carrier according to claim 3 is characterized in that: The network frequency band is switched by sending a request to switch the network frequency band from the management board to the main management board, and obtaining the switched network frequency band: If the networking frequency band is not used by other lines, reply to start networking to request the slave management board, the slave management board enters the networking operation state, and re-judges whether the slave management board meets the conditions for handing over the networking frequency band; If the networking frequency band is used by other lines for frequency band detection, the slave management board will be replied with "waiting for networking" and the slave management board will enter the waiting for networking state. After the waiting time is over, a networking request will be sent to the master management board. If the networking frequency band is used by other slave management boards for networking, the requesting management board will be added to the frequency band usage queue and wait for the master management board to send the networking frequency band information.

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