CN112039035A - Optical fiber communication system and method based on 2M conventional channel - Google Patents
Optical fiber communication system and method based on 2M conventional channel Download PDFInfo
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- CN112039035A CN112039035A CN202010793631.9A CN202010793631A CN112039035A CN 112039035 A CN112039035 A CN 112039035A CN 202010793631 A CN202010793631 A CN 202010793631A CN 112039035 A CN112039035 A CN 112039035A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
- H02H1/0069—Details of emergency protective circuit arrangements concerning transmission of signals by means of light or heat rays
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Abstract
The invention discloses a fiber communication system and method based on 2M conventional channel, the system includes: the device comprises a 2M optical fiber network module, a delay measurable module, a sampling value resampling module, a quick forwarding module, a ring network multi-end protection module, a protection quick correct action module and a self-healing module, wherein the 2M optical fiber network module, the delay measurable module, the sampling value resampling module and the quick forwarding module are respectively in communication connection with the ring network multi-end protection module, and the ring network multi-end protection module is respectively in communication connection with the protection quick correct action module and the self-healing module. The multi-terminal differential protection of the looped network can realize the quick and correct protection and has certain network self-healing capability.
Description
Technical Field
The invention relates to a 2M conventional channel-based optical fiber communication system and a method, belonging to the technical field of optical fiber communication.
Background
The optical fiber channel is used as a medium for communication between devices and can transmit signals required by the protection devices on each side, wherein the signals comprise current, voltage analog quantity signals, latching signals, remote transmission remote tripping signals and the like. Fibre channel supports both dedicated channels and multiplexed channels. Each frame of the fiber optic communication channel of the device contains a separate digital signal for each sampling interval. Each frame of information received over the fibre channel is subjected to a security check to ensure the integrity of the information. Within the allowable transmission distance range, a special optical fiber is preferably adopted as a transmission mode. When the power does not satisfy the condition, "multiplexing channels" may be employed. When a dedicated channel is used, there is no theoretical limit to the transmission rate. With multiplexed channels, SDH traditionally only allocates 2M bandwidth.
The connection mode of the dedicated transmission channel is shown in fig. 1, and the connection mode of the multiplexing transmission channel is shown in fig. 2.
The double-end differential and three-end differential using the optical fiber channel have a great deal of application, along with the great access of the distributed power supply, the power is sent out in the forms of multi-branch dedicated lines, T connection and the like, and due to the limitation of land resources and line corridors, the requirement that a great amount of distributed power supplies are accessed into a system in a multi-point T connection mode is more and more urgent. The normal power transmission of other ends is influenced by the fault of any end of a multipoint T-shaped connection mode, so that the fast removal is required once the fault occurs, and due to the particularity of the multipoint T-shaped connection circuit, the distance protection and the zero sequence protection cannot meet the requirements of the speed and the selectivity, the multipoint circuit differential protection suitable for the multipoint T-shaped connection occasion is urgently needed, and the problem of relay protection configuration of the multipoint T-shaped connection circuit for transmitting distributed energy power is solved. The protection device communication configuration suitable for the multi-terminal system mainly comprises a star network and a ring network from the aspect of a topological structure.
The star networking is as shown in the following 3, a star communication topology is adopted, each side is respectively provided with a protection device, the slave machines are connected with the host machine through optical fibers, the host machine completes data acquisition and synchronization of the host machine and other sides, the calculation of differential protection is completed, after action conditions are met, differential protection acts, meanwhile, the host machine sends tripping signals to each side, and tripping is independently completed by each side. By adopting a star mode, the application requirements can be met by the conventional 2M channel, the action time is protected from increasing along with the increase of nodes, and the action time is only related to the maximum channel delay of each channel.
Disclosure of Invention
The invention aims to solve the technical problems of large communication data volume, data synchronization and the like of a ring network under the condition that a private network is not built and a 2M conventional channel is still used, and provides a 2M conventional channel-based optical fiber communication system and a method, which improve the existing 2M communication interface and enable the communication interface to be suitable for ring network communication.
The invention aims at the problem that the protection can not act quickly because the data delay of each sub-machine after synchronization of the existing ring network is increased along with the increase of nodes. Under the premise of not increasing investment for building a private communication network, data synchronization and controllable delay are realized by using a delay measurable sampling value resampling technology and a rapid forwarding technology, so that the action time of protection can be ensured, and the reliability of protection can be enhanced by using self-healing of a ring network.
The invention specifically adopts the following technical scheme: a fiber optic communication system based on 2M conventional channels, comprising: the device comprises a 2M optical fiber network module, a delay measurable module, a sampling value resampling module, a quick forwarding module, a ring network multi-end protection module, a protection quick correct action module and a self-healing module, wherein the 2M optical fiber network module, the delay measurable module, the sampling value resampling module and the quick forwarding module are respectively in communication connection with the ring network multi-end protection module, and the ring network multi-end protection module is respectively in communication connection with the protection quick correct action module and the self-healing module.
As a preferred embodiment, the 2M optical fiber network module is configured to: 2M fibre channel networking is adopted.
As a preferred embodiment, the delay measurable module is configured to perform: the delay added to the message information can be measured.
In a preferred embodiment, the sampling value resampling module is configured to: and realizing the synchronization of the message data by using a resampling technology.
As a preferred embodiment, the fast forwarding module is configured to: and the message is forwarded by adopting the FPGA technology to realize the rapid forwarding of the message information.
As a preferred embodiment, the ring network multi-terminal protection module is configured to: and constructing a ring network topology structure.
As a preferred embodiment, the ring network topology structure includes a protection device 1, a protection device 2, a protection device 3, a protection device 4, and a protection device 5, where the protection device 1 is in communication connection with the protection device 5 through an optical fiber, the protection device 1 is in communication connection with the protection device 2 through an optical fiber, the protection device 2 is in communication connection with the protection device 3 through an optical fiber, the protection device 3 is in communication connection with the protection device 4 through an optical fiber, and the protection device 4 is in communication connection with the protection device 5 through an optical fiber.
As a preferred embodiment, the protection fast correct action module is configured to: the multi-terminal differential protection is completed based on the ring network topology structure of the ring network multi-terminal protection module.
As a preferred embodiment, the self-healing module is configured to: each node in the ring network topological structure based on the ring network multi-terminal protection module is in a peer-to-peer relationship, and because the communication is bidirectional, when any channel is abnormal, the protection device can still work, and self-healing is realized.
The invention also provides a 2M conventional channel-based optical fiber communication method, which is characterized by comprising the following steps of:
step SS 1: the method comprises the following steps of controllable delay and data synchronization, and specifically comprises the following steps: adopting a 2M optical fiber channel for networking; adding delay into message information can be measured; realizing the synchronization of message data by using a resampling technology; the message is forwarded by adopting the FPGA technology to realize the rapid forwarding of the message information;
step SS 2: the looped network multi-end protection step specifically comprises: constructing a ring network topology structure; the ring network topology structure comprises a device 1, a device 2, a device 3, a device 4 and a device 5, wherein the device 1 is in communication connection with the device 5 through optical fibers, the device 1 is in communication connection with the device 2 through optical fibers, the device 2 is in communication connection with the device 3 through optical fibers, the device 3 is in communication connection with the device 4 through optical fibers, and the device 4 is in communication connection with the device 5 through optical fibers;
step SS 3: the step of protecting the quick and correct action specifically comprises the following steps: the multi-terminal differential protection is completed based on the ring network topology structure of the ring network multi-terminal protection module.
Step SS 4: the self-healing step specifically comprises the following steps: each node in the ring network topological structure based on the ring network multi-terminal protection module is in a peer-to-peer relationship, and because the communication is bidirectional, when any channel is abnormal, the protection device can still work, and self-healing is realized.
The invention achieves the following beneficial effects: because the 2M optical fiber network is used, the delay of the transmission time cannot be avoided, and the message is forwarded through the FPGA so that the residence time of the message is delayed to the lowest; the delay measurement technology provides conditions for the synchronization of sampling values of all nodes; the invention solves the problem of long time delay of looped network synchronous data, and the looped network multi-terminal differential protection built by the technology can ensure quick action and also can enhance the reliability of protection by utilizing the self-healing of the looped network.
Drawings
Fig. 1 is a schematic diagram of a connection mode of a conventional dedicated transmission channel.
Fig. 2 is a schematic diagram of a connection method of a conventional multiplexing transmission channel.
Fig. 3 is a schematic diagram of a conventional star networking.
Fig. 4 is a connection diagram of a 2M conventional channel-based fiber optic communication system of the present invention.
Fig. 5 is a schematic diagram of a topology of a ring network constructed by the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1: as shown in fig. 4, the present invention provides a fiber optic communication system based on 2M conventional channel, comprising: the device comprises a 2M optical fiber network module, a delay measurable module, a sampling value resampling module, a quick forwarding module, a ring network multi-end protection module, a protection quick correct action module and a self-healing module, wherein the 2M optical fiber network module, the delay measurable module, the sampling value resampling module and the quick forwarding module are respectively in communication connection with the ring network multi-end protection module, and the ring network multi-end protection module is respectively in communication connection with the protection quick correct action module and the self-healing module.
Optionally, the 2M optical fiber network module is configured to: 2M fibre channel networking is adopted.
Optionally, the delay measurable module is configured to perform: the delay added to the message information can be measured.
Optionally, the sampling value resampling module is configured to: and realizing the synchronization of the message data by using a resampling technology. By using sampling value synchronization technology, namely fully using the delay measurable technology, each device accurately compensates and calculates the delay of the respective asynchronous sampling data at a uniform fixed sampling rate
Optionally, the fast forwarding module is configured to: and the message is forwarded by adopting the FPGA technology to realize the rapid forwarding of the message information.
Optionally, the ring network multi-end protection module is configured to: and constructing a ring network topology structure.
Optionally, as shown in fig. 5, the ring network topology includes a protection device 1, a protection device 2, a protection device 3, a protection device 4, and a protection device 5, the protection device 1 is in communication connection with the protection device 5 through an optical fiber, the protection device 1 is in communication connection with the protection device 2 through an optical fiber, the protection device 2 is in communication connection with the protection device 3 through an optical fiber, the protection device 3 is in communication connection with the protection device 4 through an optical fiber, and the protection device 4 is in communication connection with the protection device 5 through an optical fiber.
Ring networking is shown in fig. 4. By adopting a ring communication mode, along with the enlargement of a loop and the increase of communication nodes, transmission data can be increased, a conventional 2M channel cannot meet the application requirement, and a special channel is required to carry out network topology. In addition, the increase of the communication nodes may cause the communication delay of the whole ring network to increase, which may result in a longer action time of the protection device. Each node in the ring network is in a peer-to-peer relationship, and because the communication is bidirectional, when any channel is abnormal, the protection device can still work, and self-healing is realized. And the star-type network can be locked and protected when any channel is abnormal.
Optionally, the protection fast correct action module is configured to: the multi-terminal differential protection is completed based on the ring network topology structure of the ring network multi-terminal protection module.
Optionally, the self-healing module is configured to: each node in the ring network topological structure based on the ring network multi-terminal protection module is in a peer-to-peer relationship, and because the communication is bidirectional, when any channel is abnormal, the protection device can still work, and self-healing is realized.
Example 2: the invention also provides a 2M conventional channel-based optical fiber communication method, which is characterized by comprising the following steps of:
step SS 1: the method comprises the following steps of controllable delay and data synchronization, and specifically comprises the following steps: adopting a 2M optical fiber channel for networking; adding delay into message information can be measured; realizing the synchronization of message data by using a resampling technology; the message is forwarded by adopting the FPGA technology to realize the rapid forwarding of the message information;
step SS 2: the looped network multi-end protection step specifically comprises: constructing a ring network topology structure; the ring network topology structure comprises a device 1, a device 2, a device 3, a device 4 and a device 5, wherein the device 1 is in communication connection with the device 5 through optical fibers, the device 1 is in communication connection with the device 2 through optical fibers, the device 2 is in communication connection with the device 3 through optical fibers, the device 3 is in communication connection with the device 4 through optical fibers, and the device 4 is in communication connection with the device 5 through optical fibers;
step SS 3: the step of protecting the quick and correct action specifically comprises the following steps: the multi-terminal differential protection is completed based on the ring network topology structure of the ring network multi-terminal protection module.
Step SS 4: the self-healing step specifically comprises the following steps: each node in the ring network topological structure based on the ring network multi-terminal protection module is in a peer-to-peer relationship, and because the communication is bidirectional, when any channel is abnormal, the protection device can still work, and self-healing is realized.
The ring network delay measurable function of the invention comprises: under normal conditions, the communication channel transmits analog quantity signals such as switching value, current, voltage and the like, and main protection of different principles such as optical fiber distance/direction, optical fiber differential and the like is formed. Any node in the ring network needs to transmit sampling data, forward and receive sampling data of other submachine, exchange state quantity data and the like. Meanwhile, a link delay message is added for calculating the link transmission delay between adjacent nodes in the ring network. The FPGA instantaneously forwards other submachine messages, so that the residence time approaches zero. And resampling according to the received sampling message and the corresponding channel delay to realize data synchronization. Any node can obtain the synchronous data of all nodes. Since the channel transmission rate is 2Mbit/s, approximately 65 16-bit words can be transmitted every 1 ms. And (3) the delay is about 3.5ms when the node reaches 9 by integrating the transmission delay, the residence time and the packing and unpacking time. Under the condition, the differential protection action meets the requirements of Q/GDW 1076610 kV-110 (66) kV line protection and auxiliary device standardized design specifications: and under the condition of 2 times of setting value, the action time is not more than 40 ms. In consideration of the practical situation of the power grid, the differential motion larger than 9 ends is unlikely to occur, and thus can meet the practical requirement.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The optical fiber communication system and method based on the 2M conventional channel are characterized by comprising the following steps: the device comprises a 2M optical fiber network module, a delay measurable module, a sampling value resampling module, a quick forwarding module, a ring network multi-end protection module, a protection quick correct action module and a self-healing module, wherein the 2M optical fiber network module, the delay measurable module, the sampling value resampling module and the quick forwarding module are respectively in communication connection with the ring network multi-end protection module, and the ring network multi-end protection module is respectively in communication connection with the protection quick correct action module and the self-healing module.
2. A 2M conventional channel-based fiber optic communication system as claimed in claim 1, wherein the 2M fiber optic network module is configured to: 2M fibre channel networking is adopted.
3. A 2M conventional channel-based fiber optic communication system as claimed in claim 1 wherein the delay measurable module is configured to perform: the delay added to the message information can be measured.
4. The fiber optic communication system according to claim 1, wherein the sample value resampling module is configured to: and realizing the synchronization of the message data by using a resampling technology.
5. The fiber optic communication system according to claim 1, wherein the fast forwarding module is configured to: and the message is forwarded by adopting the FPGA technology to realize the rapid forwarding of the message information.
6. A fiber optic communication system according to claim 1 wherein the ring network multi-port protection module is configured to: and constructing a ring network topology structure.
7. The optical fiber communication system based on the 2M conventional channel as claimed in claim 6, wherein the ring topology structure comprises a protection device 1, a protection device 2, a protection device 3, a protection device 4 and a protection device 5, the protection device 1 is communicatively connected with the protection device 5 through an optical fiber, the protection device 1 is communicatively connected with the protection device 2 through an optical fiber, the protection device 2 is communicatively connected with the protection device 3 through an optical fiber, the protection device 3 is communicatively connected with the protection device 4 through an optical fiber, and the protection device 4 is communicatively connected with the protection device 5 through an optical fiber.
8. A 2M conventional channel-based fiber optic communication system as claimed in claim 1 wherein the protection fast correct action module is configured to: the multi-terminal differential protection is completed based on the ring network topology structure of the ring network multi-terminal protection module.
9. The fiber optic communication system according to claim 6, wherein the self-healing module is configured to: each node in the ring network topological structure based on the ring network multi-terminal protection module is in a peer-to-peer relationship, and because the communication is bidirectional, when any channel is abnormal, the protection device can still work, and self-healing is realized.
10. The optical fiber communication method based on the 2M conventional channel is characterized by comprising the following steps:
step SS 1: the method comprises the following steps of controllable delay and data synchronization, and specifically comprises the following steps: adopting a 2M optical fiber channel for networking; adding delay into message information can be measured; realizing the synchronization of message data by using a resampling technology; the message is forwarded by adopting the FPGA technology to realize the rapid forwarding of the message information;
step SS 2: the looped network multi-end protection step specifically comprises: constructing a ring network topology structure; the ring network topology structure comprises a device 1, a device 2, a device 3, a device 4 and a device 5, wherein the device 1 is in communication connection with the device 5 through optical fibers, the device 1 is in communication connection with the device 2 through optical fibers, the device 2 is in communication connection with the device 3 through optical fibers, the device 3 is in communication connection with the device 4 through optical fibers, and the device 4 is in communication connection with the device 5 through optical fibers;
step SS 3: the step of protecting the quick and correct action specifically comprises the following steps: the multi-terminal differential protection is completed based on the ring network topology structure of the ring network multi-terminal protection module.
Step SS 4: the self-healing step specifically comprises the following steps: each node in the ring network topological structure based on the ring network multi-terminal protection module is in a peer-to-peer relationship, and because the communication is bidirectional, when any channel is abnormal, the protection device can still work, and self-healing is realized.
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Cited By (1)
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