CN115865641A - Double-master-station system and data transmission method suitable for double-master-station system - Google Patents
Double-master-station system and data transmission method suitable for double-master-station system Download PDFInfo
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- CN115865641A CN115865641A CN202211506638.3A CN202211506638A CN115865641A CN 115865641 A CN115865641 A CN 115865641A CN 202211506638 A CN202211506638 A CN 202211506638A CN 115865641 A CN115865641 A CN 115865641A
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Abstract
The invention belongs to the technical field of data communication of power systems, and particularly relates to a double-master-station system and a data transmission method suitable for the double-master-station system. The data transmission method suitable for the double-master-station system comprises the following steps: acquiring in-station real-time data and communication states of each bay level device, transmitting the acquired in-station real-time data to a corresponding host, and judging the communication states of each bay level device; and if the interlayer device with the abnormal communication state exists, acquiring the in-station real-time data of the interlayer device with the abnormal communication state through another data communication gateway machine and transmitting the in-station real-time data to the corresponding main station. The invention can simultaneously ensure the integrity of the real-time data in the station transmitted by the two data communication gateway machines and has higher reliability.
Description
Technical Field
The invention belongs to the technical field of data communication of power systems, and particularly relates to a double-master-station system and a data transmission method suitable for the double-master-station system.
Background
In the production and operation processes of a transformer substation, a power plant and a new energy plant, operation real-time monitoring data of a power grid and the power plant are required to be transmitted to a remote regulation and control center, a centralized control station and other master station systems, the operation real-time monitoring data mainly comprise remote measurement, remote signaling, remote control and remote pulse data, and the remote signaling data need to be prevented from being retransmitted and prevented from being missed.
The retransmission of the remote signaling data can aggravate the complexity of the maintenance and the use of the master station and the read-write load of the real-time database, and reduce the timeliness of the remote signaling data; the missing transmission of the remote signaling data can cause the state monitored by the master station system to be inconsistent with the actual equipment operation state. The two situations can cause misjudgment of operation and maintenance personnel on the current operation state of the intelligent substation, and then great potential safety hazards are brought to the operation of the power system.
The data communication gateway is used as a key device for remote monitoring of the power system, plays an important role in bridging data transmission processes of a master station system and stations such as a transformer substation and a power plant, is generally prepared in a double-layer mode, and in order to avoid retransmission and missing transmission of data, a method of double-machine synchronization is generally adopted at present: and synchronizing the data which is successfully forwarded by one data communication gateway machine to another data communication gateway machine, and ensuring that the other data communication gateway machine does not send the same data to the master station any more, namely the data is not retransmitted. Although the method effectively solves the problem of non-retransmission of data, the missed data transmission can only be solved through a dual redundancy mechanism, and the missed data transmission can not be effectively avoided.
In order to solve the problem of missed transmission, the chinese patent application publication No. CN108111355A discloses a method, an apparatus, and a medium for a data communication gateway and synchronizing data thereof, and particularly discloses that in a master-slave mode, when the communication between a host and a bay layer device is abnormal, corresponding remote signaling data is acquired by a slave and transmitted to a master station. The method effectively solves the problem of data missing when facing a master station. However, when the communication between the backup device and the bay level device is abnormal, the whole system is seriously affected, and the reliability is low.
Disclosure of Invention
The invention aims to provide a double-master-station system and a data transmission method suitable for the double-master-station system, which are used for solving the problem of low reliability of a data synchronization method in the prior art.
In order to achieve the above object, the present invention provides a data transmission method suitable for a dual master station system, where the dual master station system includes a first data communication gateway and a second data communication gateway, the first data communication gateway and the second data communication gateway are respectively in communication connection with each spacer layer device, the first data communication gateway is in communication connection with one master station, the second data communication gateway is in communication connection with another master station, and both the two data communication gateways execute the following steps:
acquiring in-station real-time data and communication states of each bay level device, transmitting the acquired in-station real-time data to a corresponding host, and judging the communication states of each bay level device;
and if the interlayer device with the abnormal communication state exists, acquiring the in-station real-time data of the interlayer device with the abnormal communication state through another data communication gateway machine and transmitting the in-station real-time data to the corresponding main station.
The beneficial effects are as follows: according to the data transmission method suitable for the double-master-station system, when communication abnormity exists, the interlayer device with the communication abnormity can be accurately determined, then the real-time data in the station of the interlayer device with the communication abnormity is obtained by using the other data communication gateway machine, the missing real-time data in the station of the two data communication gateway machines are finally supplemented, and the two data communication gateway machines are respectively sent to the master stations connected with the two data communication gateway machines, so that the problem of missed sending is effectively solved, the problem of system paralysis caused by the fault of the standby machine in the prior art is solved, and the reliability is high.
Further, the two data communication gateway machines execute the following steps:
if the interlayer device with the abnormal communication state exists, generating corresponding abnormal communication data;
sending abnormal communication data to the other data communication gateway machine, acquiring feedback data sent by the other data communication gateway machine, and transmitting the received feedback data to the corresponding master station; the feedback data is real-time data in the station of the interlayer device with abnormal communication;
and if the abnormal communication data sent by the other data communication gateway machine is received, determining corresponding feedback data according to the received abnormal communication data, and sending the feedback data to the other data communication gateway machine.
The beneficial effects are as follows: the data communication gateway machine can accurately know the interlayer device with abnormal communication state in the machine by sending abnormal communication data to another data communication gateway machine, and returns corresponding in-station real-time data, thereby further ensuring the reliability in the data transmission process.
Furthermore, the two data communication network switches are connected by adopting a synchronous private network.
The beneficial effects are as follows: the two data communication network closers are connected by adopting the synchronous private network, so that when the data transmission network at other positions of the data communication network closers is abnormal, the two data communication network closers can still normally operate to transmit information, and the stability of data transmission is further improved.
In order to achieve the above purpose, the present invention provides a dual master station system, which comprises a first data communication gateway machine, a second data communication gateway machine, a first master station, a second master station and a plurality of spacer layer devices, wherein the first data communication gateway machine is connected with the first master station, the second data communication gateway machine is connected with the second master station, and the first data communication gateway machine and the second data communication gateway machine are both connected with each spacer layer device; the first data communication gateway machine is connected with the second data communication gateway machine, and the two data communication gateway machines execute the following steps:
acquiring in-station real-time data and communication states of each bay level device, transmitting the acquired in-station real-time data to a corresponding host, and judging the communication states of each bay level device;
and if the interlayer device with the abnormal communication state exists, acquiring the in-station real-time data of the interlayer device with the abnormal communication state through another data communication gateway machine and transmitting the in-station real-time data to the corresponding main station.
The beneficial effects are as follows: according to the double-master-station system, the communication state of each connected spacer layer device is judged, the spacer layer device with abnormal communication and the missing in-station real-time data are accurately determined, then the in-station real-time data of the spacer layer device with abnormal communication are obtained by using the other data communication gateway machine, the missing in-station real-time data in the two data communication gateway machines are finally supplemented, and the two data communication gateway machines are respectively sent to the master station connected with the two data communication gateway machines, so that the problem of missed sending is effectively solved, the problem of system paralysis caused by the failure of the backup machine in the prior art is solved, and the reliability is high.
Further, the two data communication gateway machines execute the following steps:
if the interlayer device with the abnormal communication state exists, generating corresponding abnormal communication data;
sending abnormal communication data to another data communication gateway machine, acquiring feedback data sent by the other data communication gateway machine, and transmitting the received feedback data to a corresponding master station; the feedback data is real-time data in the station of the interlayer device with abnormal communication;
and if the abnormal communication data sent by the other data communication gateway machine is received, determining corresponding feedback data according to the received abnormal communication data, and sending the feedback data to the other data communication gateway machine.
The beneficial effects are as follows: the data communication gateway machine can accurately know the interlayer device with abnormal communication state in the machine by sending abnormal communication data to another data communication gateway machine, and returns corresponding in-station real-time data, thereby further ensuring the reliability in the data transmission process.
Furthermore, the two data communication network switches are connected by adopting a synchronous private network.
The beneficial effects are as follows: the two data communication network closers are connected by adopting the synchronous private network, so that when the data transmission network at other positions of the data communication network closers is abnormal, the two data communication network closers can still normally operate to transmit information, and the stability of data transmission is further improved.
Drawings
FIG. 1 is a schematic diagram of a dual master station system according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating dual-computer synchronization of two data communication gateways according to an embodiment of the present invention;
fig. 3 is a communication packet format diagram of the dual-computer communication service according to the embodiment of the system of the present invention.
Detailed Description
The embodiment of the system is as follows:
a schematic structural diagram of the dual master station system of this embodiment is shown in fig. 1, and includes a data communication gateway machine a, a data communication gateway machine B, a master station 1, a master station 2, and 4 spacer layer devices; the data communication gateway machine A is connected with the master station 1 through a link A1, the data communication gateway machine B is connected with the master station 2 through a link B2, and the data communication gateway machine and the master station communicate based on an IEC104 protocol; the data communication gateway machine A is connected with the 4 spacer layer devices through a network A, and the data communication gateway machine B is connected with the 4 spacer layer devices through a network B.
Fig. 2 shows a schematic diagram of a dual-computer synchronization between a data communication gateway a and a data communication gateway B, where the data communication gateway a and the data communication gateway B both include: the system comprises a forwarding master station module, a double-machine synchronous communication module, an in-station data access module and a device communication state judgment module; the in-station data access module in the data communication gateway machine A and the interlayer device 3 are in a communication interruption state, namely the in-station data access module of the data communication gateway machine A cannot acquire in-station real-time data of the interlayer device 3; the in-station data access module in the data communication gateway machine B and the bay layer device 2 are in a communication interruption state, that is, the in-station data access module of the data communication gateway machine B cannot acquire the in-station real-time data of the bay layer device 2.
The dual-computer synchronous communication module in the data communication gateway machine a and the dual-computer synchronous communication module in the data communication gateway machine B are connected through a synchronous private network, communication is performed based on TCP protocol communication, the format of the communication packet is shown in fig. 3, and the communication packet includes a packet start character, a two-byte ASDU (application service data unit) length, a sending sequence number, a receiving sequence number, a packet type and an application service data field, and the packet type includes: testing a heartbeat frame, a message confirmation frame, a communication state frame, a remote signaling data synchronization frame and a remote measuring synchronization data frame; when the message type is a communication state frame, the application service data field of the communication message is as shown in table 1, and the communication state of each bay layer device occupies 1 byte:
TABLE 1
| Application service data field | Length of |
| Spacer |
1 byte |
When the message type is a remote signaling data synchronization frame, the application service data domain of the communication message is shown in table 2, each remote signaling data is 13 bytes, and the remote signaling data includes a unique identification index of 4 bytes, a remote signaling value of 1 byte, a remote signaling quality of 1 byte, and a remote signaling time scale of 7 bytes:
TABLE 2
When the message type is a telemetry data synchronization frame, the application service data field of the communication message is as shown in table 3, each telemetry data is 13 bytes, and includes a unique identification index of 4 bytes, a telemetry value of 1 byte, a telemetry quality of 1 byte, and a telemetry time scale of 7 bytes:
TABLE 3
The in-station data access module is respectively connected with the forwarding main station module, the double-machine synchronization module, the device communication state judgment module and the 4 spacer layer devices; the in-station data access module in the data communication gateway machine A is used for acquiring in-station real-time data (including remote signaling data and remote measuring data) and communication states of the spacer layer devices 1, 2 and 4, transmitting the in-station real-time data to the forwarding master station module and the double-machine synchronization module of the data communication gateway machine A, and sending the communication states to the device communication state judgment module; the in-station data access module in the data communication gateway machine B is used for acquiring in-station real-time data (including remote signaling data and remote measuring data) of the spacer layer devices 1, 3 and 4, transmitting the in-station real-time data to the forwarding main station module and the dual-computer synchronization module of the data communication gateway machine B, and sending the communication state to the device communication state judgment module.
The communication state is used for representing whether the communication between the bay level device and the data access module in the station is normal or not, and includes two situations of normal communication and communication interruption, specifically, the communication state in this embodiment is transmitted by testing a heartbeat frame.
The device communication state judgment module is connected with the double-computer synchronization module; the device communication state judgment module in the data communication gateway machine A is used for processing communication state data of the spacer layer devices 1-4, determining the spacer layer device 3 with communication interruption, generating abnormal communication data, and sending the abnormal communication data representing the communication interruption of the data communication gateway machine A and the spacer layer device 3 to the dual-machine synchronization module of the data communication gateway machine A; the device communication state judgment module in the data communication gateway machine B is used for processing communication state data of the spacer layer devices 1-4, determining the spacer layer device 2 with communication interruption, and sending abnormal communication data representing the communication interruption between the data communication gateway machine B and the spacer layer device 2 to the dual-computer synchronization module of the data communication gateway machine B.
The double-machine synchronous module is also respectively connected with the double-machine synchronous communication module and the forwarding master station module. The data communication gateway machine A is provided with a dual-machine synchronization module for: (1) The method comprises the steps that communication interruption abnormal communication data which are sent by a data communication gateway machine B and characterize the data communication gateway machine B and a spacer layer device 2 are received through a dual-machine synchronous communication module, in-station real-time data, namely feedback data, of the spacer layer device 2 are screened out, and the feedback data are sent to the data communication gateway machine B; (2) And sending abnormal communication data representing that the data communication gateway machine A and the spacer layer device 3 have communication interruption to the data communication gateway machine B through the dual-machine synchronous communication module, receiving feedback data sent by the data communication gateway machine B, and sending the feedback data to the forwarding main station module.
The dual-computer synchronization module in the data communication gateway B is used for: (1) Receiving abnormal communication data which is used for representing communication interruption between the data communication gateway machine A and the spacer layer device 3 and is sent by the data communication gateway machine A through the dual-machine synchronous communication module, screening out real-time data in a station of the spacer layer device 3, namely feedback data, and sending the feedback data to the data communication gateway machine A; (2) And sending abnormal communication data representing that the data communication gateway machine B and the spacer layer device 2 have communication interruption to the data communication gateway machine A through the dual-machine synchronous communication module, receiving feedback data sent by the data communication gateway machine A, and sending the feedback data to the forwarding main station module.
The forwarding master station module of the data communication gateway machine A is connected with the master station 1 and is used for sending the in-station real-time data of the spacer layer devices 1, 2 and 4 sent by the in-station data access module and the in-station real-time data of the spacer layer device 3 sent by the dual-machine synchronization module to the master station; the forwarding master station module of the data communication gateway machine B is connected to the master station 2, and is configured to send the in-station real-time data of the bay layer devices 1, 3, and 4 sent by the in-station data access module and the in-station real-time data of the bay layer device 2 sent by the dual-machine synchronization module to the master station together.
The method comprises the following steps:
the embodiment of the method is directed to the dual master station system in the above system embodiment, and the connection mode and the operation principle between each component included in the system and each component have been described in detail in the system embodiment. The basic idea of the data dual-computer synchronization method based on the data communication gateway adopted by the system is as follows: the two data communication gateway machines execute the following steps: acquiring in-station real-time data and communication states of each bay level device, transmitting the acquired in-station real-time data to a corresponding host, and judging the communication states of each bay level device; and if the interlayer device with the abnormal communication state exists, acquiring the in-station real-time data of the interlayer device with the abnormal communication state through another data communication gateway machine and transmitting the in-station real-time data to the corresponding main station. The specific implementation process of the method has been described in detail in the system embodiment, and the embodiment of the method is not described again.
Claims (6)
1. A data transmission method suitable for a dual-master station system is characterized in that: the dual-master-station system comprises a first data communication gateway machine and a second data communication gateway machine which are respectively in communication connection with each interlayer device, the first data communication gateway machine is in communication connection with one master station, the second data communication gateway machine is in communication connection with the other master station, and the two data communication gateway machines execute the following steps:
acquiring in-station real-time data and communication states of each bay level device, transmitting the acquired in-station real-time data to a corresponding host, and judging the communication states of each bay level device;
and if the interlayer device with the abnormal communication state exists, acquiring the in-station real-time data of the interlayer device with the abnormal communication state through another data communication gateway machine and transmitting the in-station real-time data to the corresponding main station.
2. The data transmission method for a dual master station system according to claim 1, wherein: the two data communication network switches execute the following steps:
if the interlayer device with the abnormal communication state exists, generating corresponding abnormal communication data;
sending the abnormal communication data to another data communication gateway machine, acquiring feedback data sent by the other data communication gateway machine, and transmitting the received feedback data to a corresponding master station; the feedback data is in-station real-time data of the interlayer device with abnormal communication;
and if the abnormal communication data sent by the other data communication gateway machine is received, determining corresponding feedback data according to the received abnormal communication data, and sending the feedback data to the other data communication gateway machine.
3. The data transmission method for a dual master station system according to claim 1 or 2, wherein: the two data communication network closers are connected by adopting a synchronous private network.
4. A double-master-station system comprises a first data communication gateway machine, a second data communication gateway machine, a first master station, a second master station and a plurality of spacer layer devices, wherein the first data communication gateway machine is connected with the first master station, the second data communication gateway machine is connected with the second master station, and the first data communication gateway machine and the second data communication gateway machine are both connected with the spacer layer devices; the method is characterized in that: the first data communication gateway machine is connected with the second data communication gateway machine, and the two data communication gateway machines execute the following steps:
acquiring in-station real-time data and communication states of each bay level device, transmitting the acquired in-station real-time data to a corresponding host, and judging the communication states of each bay level device;
and if the interlayer device with the abnormal communication state exists, acquiring the in-station real-time data of the interlayer device with the abnormal communication state through another data communication gateway machine and transmitting the in-station real-time data to the corresponding main station.
5. The dual master station system of claim 4, wherein: the two data communication network switches execute the following steps:
if the interlayer device with the abnormal communication state exists, generating corresponding abnormal communication data;
sending the abnormal communication data to another data communication gateway machine, acquiring feedback data sent by the other data communication gateway machine, and transmitting the received feedback data to a corresponding master station; the feedback data is real-time data in the station of the interlayer device with abnormal communication;
and if the abnormal communication data sent by the other data communication gateway machine is received, determining corresponding feedback data according to the received abnormal communication data, and sending the feedback data to the other data communication gateway machine.
6. The dual master station system according to claim 4 or 5, wherein: the two data communication network closers are connected by adopting a synchronous private network.
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