CN112422180B - Method for identifying consistency of multiplexed fiber channel route and differential protection device - Google Patents
Method for identifying consistency of multiplexed fiber channel route and differential protection device Download PDFInfo
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- CN112422180B CN112422180B CN202011181403.2A CN202011181403A CN112422180B CN 112422180 B CN112422180 B CN 112422180B CN 202011181403 A CN202011181403 A CN 202011181403A CN 112422180 B CN112422180 B CN 112422180B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
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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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- 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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- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The invention relates to a method for identifying routing consistency of a multiplexing optical fiber channel and a differential protection device, which are used for judging whether two optical fiber channels are input and at least one optical fiber channel is a multiplexing optical fiber channel, if so, judging whether the data reception of the two optical fiber channels is normal, and if so, selecting a reference optical fiber channel; the non-reference optical fiber channel is used as a virtual reference channel to complete sampling synchronization of the local terminal and the opposite terminal, and obtain non-reference optical fiber sampling time deviation; and comparing according to the sampling time deviation of the two optical fiber channels, and judging the consistency of the transceiving routes of the multiplexing optical fiber channels. The invention can realize real-time monitoring of the operation condition of the used multiplexing optical fiber channel by upgrading software for differential protection without adding additional channel equipment, and can give real-time early warning for the condition that the receiving and sending routes of the multiplexing optical fiber channel are inconsistent, thereby effectively improving the reliability of optical fiber current differential protection.
Description
Technical Field
The invention relates to the technical field of power relay protection, in particular to a multiplexing fiber channel route consistency identification method and a differential protection device.
Background
The optical fiber is used as a channel medium for relay protection, has the advantages of long transmission distance, low attenuation, large communication capacity, strong anti-interference capability and the like, and becomes the first choice of a current differential protection channel medium of a power line.
For the high-voltage optical fiber current differential protection, the power-on time of the protection devices at the two ends is different, the sampling crystal oscillator deviation is different, and the time delay for transmitting the sampling data from one end to the other end is added, so the sampling time of the current quantity at the two ends is usually inconsistent, and the differential calculation cannot be directly carried out. In order to make the sampling times of the two-terminal current quantities to be calculated consistent, the sampling time at one terminal needs to be set as a reference (master terminal), and the sampling time at the other terminal needs to be adjusted by referring to the reference (slave terminal), so that the process of adjusting the sampling times of the two-terminal protection is called synchronous adjustment. The common synchronous adjustment mode is a trapezoidal algorithm, the protection slave end firstly adopts the trapezoidal algorithm to calculate the sampling deviation of the protection devices at two sides; aligning sampling serial numbers at two ends by adjusting the sampling serial numbers; and after the slave end completes the synchronous adjustment, the master end is informed to enter a synchronous state, and the synchronous adjustment process is completed by the two sides. Because the calculation of the channel delay is based on the isosceles trapezoid principle, the receiving and sending route delays of the optical fiber channels are required to be consistent, otherwise, the synchronous calculation of the two sides is deviated, a difference current alarm can be reported for a long time when the load current is large, and the action reliability of the optical fiber current differential protection can be influenced when the load current is serious.
The extra-high voltage long-distance transmission becomes an important way for solving the problem that a resource energy center and an economic center are reversely distributed, the extra-high voltage transmission line is hundreds of kilometers frequently, and the long-distance transmission line protection optical fiber channel mostly adopts a multiplexing channel based on an SDH optical fiber communication system. The SDH optical transmission equipment has strong advantages of networking and self-healing, and becomes one of the indispensable means of the backbone transmission network of the modern power system architecture. However, the long-distance and complex-structure SDH multiplexing channel improves the rapidity and sensitivity of the line differential protection action, and also brings risks to the reliability of the differential protection.
For a special optical fiber channel, the synchronous adjustment principle based on channel transceiving route consistency can not be influenced by the channel all the time, but for a multiplexing SDH optical fiber channel, the risk of channel transceiving delay inconsistency exists in other network structures except for adopting a two-fiber bidirectional multiplexing section inversion ring in the actual operation process, for the risk, the existing channel technology and equipment can not be well solved except for optimizing a grid structure, and hidden danger is brought to the reliability of pilot current differential protection of the SDH network structure adopting the non-two-fiber bidirectional multiplexing section inversion ring.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for identifying the routing consistency of a multiplexing optical fiber channel and a differential protection device, which are used for monitoring the running condition of the multiplexing optical fiber channel in real time, eliminating the influence of the inconsistency of the receiving and sending routes of the multiplexing optical fiber channel on the differential protection in time and improving the poor reliability of the differential protection action.
In order to achieve the above object, the present invention provides a method for identifying routing consistency of a multiplexing fibre channel, comprising the following steps:
(1) judging whether two optical fiber channels are input and at least one optical fiber channel is a multiplexing optical fiber channel, if so, entering the step (2), and if not, finishing the identification;
(2) judging whether the data reception of the two optical fiber channels is normal or not, if so, entering the step (3), and if not, finishing the identification;
(3) selecting a reference optical fiber channel;
(4) the method comprises the steps that sampling synchronization of a local terminal and an opposite terminal is completed through a reference optical fiber channel, reference optical fiber sampling time deviation is obtained, a non-reference optical fiber channel is used as a virtual reference channel to perform virtual synchronization of the local terminal and the opposite terminal, synchronous sampling is performed, and non-reference optical fiber sampling time deviation is obtained;
(5) and comparing according to the sampling time deviation of the two optical fiber channels, and judging the consistency of the receiving and sending routes of the multiplexing optical fiber channels.
Further, selecting a reference fiber channel comprises:
if the channel mode is set as a special mode, the channel is accessed into an optical fiber channel with fixed and consistent transmitting and receiving routes, and the channel is a special mode optical fiber channel or a two-fiber bidirectional multiplexing section switching ring; if the channel mode is set as a multiplexing mode, the channel is accessed to a fiber channel with unfixed and consistent transmitting and receiving routes;
if one special optical fiber channel and the other optical fiber channel are multiplexed, selecting the special optical fiber channel as a reference optical fiber channel;
if the two are both multiplexing optical fiber channels, preferentially selecting the multiplexing optical fiber channel where the two-fiber bidirectional multiplexing section switching ring with better routing consistency is located as a reference optical fiber channel;
if the two channel grid structures are the same or the grid structure is ambiguous, the fiber channel with the shorter channel delay is preferentially selected as the reference fiber channel.
Further, after the fiber current differential protection device is powered on or the channel delay variation exceeds a set threshold, the fiber current differential protection device executes a method for identifying the inconsistency of the multiplexed fiber channel receiving and sending routes.
Further, the method for judging whether the two fiber channels are put into use and at least one fiber channel is a multiplexing fiber channel comprises the following steps: reading the input channel fixed value, judging whether the channel fixed value comprises a multiplexing optical fiber channel, reading the control word to determine the quantity of the input optical fiber channels, and reading the on-off condition of the pressing plate to determine the input multiplexing optical fiber channel.
Further, the judging whether the data reception of the two optical fiber channels is normal includes: and monitoring data receiving and sending of the two optical fiber channels, when no channel is interrupted in receiving, no channel is in mixed connection, no device is in mixed connection, and the channel delay length meets the requirement of a threshold value, indicating that the data receiving is normal, otherwise, judging that the data receiving is abnormal, and outputting alarm information.
Further, if the consistency of the two fiber channels does not meet the requirement: when the reference channel selects a channel which fixedly meets the consistency of the receiving and sending routes, the inconsistency of the receiving and sending routes of the non-reference optical fiber channel is alarmed; and if the reference channel selects a channel which is not fixed and meets the consistency of the receiving and sending routes, the receiving and sending routes of the multiplexing optical fiber channel are not consistent.
Furthermore, when the reference channel selects and fixes a channel which meets the consistency of the receiving and sending routes, after the receiving and sending routes of the non-reference optical fiber channel are not consistent, the non-reference optical fiber channel can be locked by selecting the differential protection device; when the reference channel selects a channel which is not fixed and meets the consistency of the receiving and sending routes, the differential protection device can be selected to lock the two multiplexing optical fiber channels after the receiving and sending routes of the alarm multiplexing optical fiber channels are inconsistent.
The invention provides a differential protection device with a multiplexing optical fiber channel route consistency identification method function, which comprises a reading unit, a monitoring unit and a main control unit, wherein the reading unit is used for reading the routing information of the multiplexing optical fiber channel;
the reading unit reads the input channel fixed value, judges whether the channel fixed value comprises a multiplexing optical fiber channel, reads the control word to determine the number of the input optical fiber channels, reads the on-off condition of the pressing plate to determine the input multiplexing optical fiber channel, and sends the multiplexing optical fiber channel to the main control unit;
the monitoring unit monitors data receiving and sending of the two optical fiber channels, judges whether the data receiving of the two optical fiber channels is normal or not, and sends a judgment result to the main control unit;
the main control unit judges whether two optical fiber channels are input and at least one optical fiber channel is a multiplexing optical fiber channel, and if the two optical fiber channels are not input, the identification is finished; if the data is not received normally, the identification is finished, and if the data is not received normally, a reference optical fiber channel is selected; the main control unit controls the reference optical fiber channel to complete sampling synchronization of a local terminal and an opposite terminal, and acquires reference optical fiber sampling time deviation; the main control unit controls the non-reference optical fiber channel to serve as a virtual reference channel to perform virtual synchronization of a local terminal and an opposite terminal, synchronous sampling is performed, and non-reference optical fiber sampling time deviation is obtained; and the main control unit controls comparison according to the sampling time deviation of the two optical fiber channels and judges the consistency of the receiving and sending routes of the multiplexing optical fiber channels.
Further, the main control unit selecting the reference fiber channel comprises:
the main control unit supports mode parameters of externally input optical fiber channels, and obtains the operation modes of two accessed optical fiber channels by reading the input channel mode parameters; if the channel mode is set as a special mode, the channel is accessed into an optical fiber channel with fixed and consistent transmitting and receiving routes, and the channel is a special mode optical fiber channel or a two-fiber bidirectional multiplexing section switching ring; if the channel mode is set as a multiplexing mode, the channel is accessed to a fiber channel with unfixed and consistent transmitting and receiving routes;
if one special optical fiber channel and the other optical fiber channel are multiplexed, selecting the special optical fiber channel as a reference optical fiber channel;
if the two are both multiplexing optical fiber channels, preferentially selecting the multiplexing optical fiber channel where the two-fiber bidirectional multiplexing section switching ring with better routing consistency is located as a reference optical fiber channel;
if the two channel grid structures are the same or the grid structure is ambiguous, the fiber channel with the shorter channel delay is preferentially selected as the reference fiber channel.
Further, if the master control unit judges that the consistency of the two optical fiber channels does not meet the requirement, then: if the reference optical fiber channel selects a channel with fixed and consistent receiving and transmitting routes, the non-reference optical fiber channel is alarmed that the receiving and transmitting routes are inconsistent; and if the reference optical fiber channel transceiving routes cannot be fixed to the same channel, selecting the optical fiber channel with shorter channel delay as the reference optical fiber channel, and alarming that the multiplexing optical fiber channel transceiving routes are not the same.
Further, when the reference channel selects a channel with fixed and consistent receiving and transmitting routes, the main control unit selects the differential protection device to lock the non-reference optical fiber channel after the main control unit alarms that the receiving and transmitting routes of the non-reference optical fiber channel are inconsistent; when the reference channel selects the channel whose receiving and sending routes can not be fixed to be consistent, after the alarm multiplexing optical fiber channel receiving and sending routes are inconsistent, the differential protection device is selected to lock the two multiplexing optical fiber channels.
Further, the main control unit controls the reference optical fiber channel to complete sampling synchronization of the local terminal and the opposite terminal, including:
selecting one end of a main control unit at two ends of a reference optical fiber channel as a main end and the other end of the main control unit as a slave end; the main control unit of the main end sends sampling data and sampling labels through a reference optical fiber channel and simultaneously sends a synchronous instruction; and the slave end main control unit performs deviation calculation of sampling moments at two sides according to the master end synchronous instruction, the sampling label and the sampling data acquired from the optical fiber channel, adjusts the sampling moments of the slave ends in a sampling deviation adjusting mode to achieve synchronization of the two ends, and informs the master end main control unit to enter a synchronization state after the synchronization adjustment is completed.
Further, the main control unit controls the non-reference optical fiber channel to complete virtual synchronization between the local terminal and the opposite terminal, including: selecting one end of a main control unit at two ends of a non-reference optical fiber channel as a main end and the other end of the main control unit as a slave end; the main control unit of the main end sends sampling data and sampling labels through an optical fiber channel and sends a virtual synchronization instruction at the same time; and the slave end main control unit performs deviation calculation of sampling moments at two sides according to the master end synchronous instruction, the sampling label and the sampling data acquired from the optical fiber channel, and calculates time deviation required to be adjusted to achieve synchronization of the two ends, but does not perform actual synchronization adjustment.
The technical scheme of the invention has the following beneficial technical effects:
(1) based on the current situation that the protection of the high-voltage and extra-high-voltage lines is configured according to double optical fiber channels at present, no additional channel equipment is needed to be added, the real-time monitoring of the operation condition of the used multiplexing optical fiber channel can be realized by upgrading software for the optical fiber current differential protection, the real-time early warning is given to the condition that the receiving and sending routes of the multiplexing optical fiber channel are inconsistent, and the reliability of the optical fiber current differential protection can be effectively improved.
(2) The realization method of the invention has simple process, and can finish the identification of the routing consistency of the multiplexing optical fiber channel without changing the existing optical fiber channel architecture and hardware facilities, thereby improving the action reliability of the optical fiber current differential protection device.
(3) The invention automatically identifies the adopted double-optical-fiber channel mode, and the identification criterion is input only when the multiplexing optical-fiber channel is input, thereby increasing the operation reliability.
(4) The invention adopts the self-adaptive principle to select the reference channel for synchronous adjustment for the two adopted optical fiber channels, preferentially selects the special channel or the multiplexing optical fiber channel with shorter time delay as the reference channel, and takes the other channel as the virtual reference channel, thereby increasing the identification accuracy.
(5) The invention compares the synchronous adjustment results of the reference channel and the virtual reference channel in real time, completes the identification of the consistency of the receiving and sending routes of the multiplexing channel according to the comparison result and realizes the identification of the consistency of the receiving and sending routes.
Drawings
FIG. 1 is a flow chart of an identification method of the present invention;
FIG. 2 is a schematic diagram of a fibre channel architecture of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In the national network enterprise symbol Q/GDW 1161-.
The flow of identifying consistency of the routing of the multiplexing fiber channel by the dual fiber channels is shown in fig. 1.
Step 1, carrying out self-adaptive input of the identification method according to the actual input condition of the optical fiber channel, if only one optical fiber channel is input, or two special optical fiber channels are input, the identification method is not input, and the identification method is input only under the condition that two optical fiber channels are input and at least one optical fiber channel is a multiplexing optical fiber channel. Reading the input channel fixed value, judging whether the channel fixed value comprises a multiplexing optical fiber channel, reading the control word to determine the quantity of the input optical fiber channels, and reading the on-off condition of the pressing plate to determine the input multiplexing optical fiber channel.
And 2, detecting the channel condition of the two input optical fiber channels, entering the step 3 if the data reception of the two optical fiber channels is normal, namely no channel reception interruption, no channel mixed connection, no device mixed connection, no channel delay time and other abnormalities exist, and otherwise, finishing the identification.
And 3, selecting the reference optical fiber channel after whether the data reception of the two optical fiber channels is normal or not. The selection principle is that if one special mode optical fiber channel and one multiplexing mode optical fiber channel exist, the special mode optical fiber channel is fixedly selected as a reference optical fiber channel because the receiving and sending routes of the special mode optical fiber channel are naturally consistent; if the two channels are optical fiber channels in a multiplexing mode, the multiplexing optical fiber channel where the two-fiber bidirectional multiplexing segment reverse ring with better routing consistency is located is preferentially selected as a reference optical fiber channel, and if the space truss structures of the two channels are the same or the space truss structures are not clear, the optical fiber channel with shorter channel delay is preferentially selected as the reference optical fiber channel in consideration of the general correlation between the delay of the multiplexing channel and the complexity of the space truss structures.
And 4, the reference optical fiber channel completes sampling synchronization of the local terminal and the opposite terminal to acquire reference optical fiber sampling time deviation, and the non-reference optical fiber channel serves as a virtual reference channel to complete sampling synchronization of the local terminal and the opposite terminal to acquire non-reference optical fiber sampling time deviation.
After the reference optical fiber channel is determined, the channel selected as the reference optical fiber channel is still subjected to the synchronous adjustment process of the side and the opposite side according to the original synchronous adjustment method such as an isosceles trapezoid algorithm, a master (M) and a slave (S) are arranged on the two sides, the master end M is a reference end and is freely sampled, the slave end S is a synchronous end, and the slave end firstly adopts a trapezoid algorithm to calculate the sampling deviation of the protection devices on the two sides; the slave end achieves the purpose of synchronous sampling with the master end device by adjusting the sampling time; and after the synchronous adjustment is finished, the slave end informs the master end to enter a synchronous state, so that the synchronous adjustment process is finished at the two sides, and the sampling time of the current amount for carrying out differential current calculation can be kept consistent only by protecting the two ends after the synchronous adjustment is finished.
In the process of synchronous adjustment of the reference optical fiber channel, the non-reference optical fiber channel is used as a virtual reference optical fiber channel to perform virtual synchronous adjustment, that is, only the synchronous adjustment process is performed, but the result of the synchronous adjustment is not used as the basis for actual synchronization of the device. The virtual synchronization method is completely the same as the synchronization method of the reference channel, for example, the isosceles trapezoid algorithm principle is adopted. Because the actual sampling deviation of the devices on the two sides does not change due to the channel, if the transceiving routes of the virtual reference optical fiber channel are consistent, the deviation of the sampling time on the two sides obtained by virtual synchronous adjustment calculation of the channel is consistent with the reference channel; if the consistency of the transceiving routes of the virtual reference optical fiber channel is damaged due to the change of the grid structure, the difference between the sampling time deviation of the two sides obtained by the virtual synchronization adjustment of the channel and the reference channel occurs, and the greater the difference is, the greater the degree of inconsistency of the transceiving routes of the channel is proved.
And 5, comparing according to the sampling time deviation of the two optical fiber channels, and judging the consistency of the receiving and sending routes of the multiplexing optical fiber channels.
Further, when the reference optical fiber channel adopts a special optical fiber channel or a two-fiber bidirectional multiplexing segment switching ring multiplexing channel mode, the receiving and sending routes of the channel of the reference channel are not inconsistent, and the receiving and sending route consistency of the non-reference optical fiber channel can be accurately identified according to the step 5 under the condition; when the reference fiber channel adopts a multiplexing fiber channel mode of other network architectures, the reference channel has the possibility of inconsistent receiving and sending routes, and considering that the two fiber channels cannot have the inconsistent routes simultaneously in the actual operation process, therefore, if only the condition that the receiving and sending routes of the reference channel are inconsistent is generated, the synchronous adjustment results of the two channels still have difference, and at the moment, the virtual reference channel still plays a checking role.
Considering that actually used fiber channel transceiving routes generally do not have mutation, the condition that the fiber channel transceiving routes are inconsistent generally occurs when a newly-built fiber channel test or a multiplexing fiber channel grid structure changes, and the identification method can be put into use only after the device is powered on or when the channel delay changes greatly.
Furthermore, after the judgment of the consistency of the transceiving time delay of the multiplexing optical fiber channel is finished, the optical fiber current differential protection device takes corresponding measures according to the judgment result. When the reference optical fiber channel adopts a special mode optical fiber channel or a two-fiber bidirectional multiplexing section reverse ring multiplexing channel mode, if the receiving and sending routes of the virtual reference channel are identified to be inconsistent, the receiving and sending routes of the virtual reference channel are alarmed to be inconsistent, and the differential protection of the channel can be locked by selection; when the reference optical fiber channel adopts a multiplexing optical fiber channel mode of other network architectures, the specific channel which is inconsistent cannot be judged, and if the receiving and sending routes of the multiplexing optical fiber are identified to be inconsistent, the receiving and sending routes of the multiplexing optical fiber channel are alarmed to be inconsistent.
In short, when the high-voltage line optical fiber current differential protection adopts the double optical fiber channels, when the two optical fiber channels are put into operation, the method can detect whether the used multiplexing optical fiber channels have inconsistent receiving and transmitting routes, and particularly when one of the double optical fiber channels is a special optical fiber channel or a two-fiber bidirectional multiplexing section switching ring multiplexing channel, the detection accuracy is higher.
The invention also provides a differential protection device with the function of the identification method for the consistency of the multiplex fibre channel route, which is actually equipment with data processing capability such as a computer and the like, and the equipment comprises a processor, wherein the processor can be a general processor, a digital signal processor, an application specific integrated circuit and the like.
Referring to fig. 2, the SDH is a differential protection device, which includes a reading unit, a monitoring unit, and a main control unit;
the reading unit reads the input channel fixed value, judges whether the channel fixed value comprises a multiplexing optical fiber channel, reads the control word to determine the number of the input optical fiber channels, reads the on-off condition of the pressing plate to determine the input multiplexing optical fiber channel, and sends the multiplexing optical fiber channel to the main control unit;
the monitoring unit monitors data receiving and sending of the two optical fiber channels, judges whether the data receiving of the two optical fiber channels is normal or not, and sends a judgment result to the main control unit;
the main control unit judges whether two optical fiber channels are input and at least one optical fiber channel is a multiplexing optical fiber channel, and if the two optical fiber channels are not input, the identification is finished; if the data is not received normally, the identification is finished, and if the data is not received normally, a reference optical fiber channel is selected; the main control unit controls the reference optical fiber channel to complete sampling synchronization of a local terminal and an opposite terminal, and acquires reference optical fiber sampling time deviation; the main control unit controls the non-reference optical fiber channel to serve as a virtual reference channel to complete sampling synchronization of a local terminal and an opposite terminal, and obtains the non-reference optical fiber sampling time deviation; and the main control unit controls comparison according to the sampling time deviation of the two optical fiber channels and judges the consistency of the receiving and sending routes of the multiplexing optical fiber channels.
Further, the main control unit selecting the reference fiber channel comprises:
the main control unit supports mode parameters of externally input optical fiber channels, and obtains the operation modes of the two accessed optical fiber channels by reading the input channel mode parameters. If the channel mode is set as a special mode, the channel is accessed into an optical fiber channel with fixed and consistent transmitting and receiving routes, and the channel is a special mode optical fiber channel or a two-fiber bidirectional multiplexing section switching ring; if the channel mode is set as the multiplexing mode, the channel is accessed by the optical fiber channel with the inconsistent transmitting and receiving routes.
If one special optical fiber channel and the other optical fiber channel are multiplexed, selecting the special optical fiber channel as a reference optical fiber channel;
if the two are both multiplexing optical fiber channels, preferentially selecting the multiplexing optical fiber channel where the two-fiber bidirectional multiplexing section switching ring with better routing consistency is located as a reference optical fiber channel;
if the two channel grid structures are the same or the grid structure is ambiguous, the fiber channel with the shorter channel delay is preferentially selected as the reference fiber channel.
Further, if the master control unit judges that the consistency of the two optical fiber channels does not meet the requirement, then: if the reference optical fiber channel adopts a special optical fiber channel or a two-fiber bidirectional multiplexing section reverse ring multiplexing channel, the inconsistency of the receiving and sending routes of the non-reference optical fiber channel is warned; and if the reference optical fiber channel selects the optical fiber channel with shorter channel delay as the reference optical fiber channel, the receiving and sending routes of the alarm multiplexing optical fiber channels are inconsistent.
Further, after the master control unit alarms that the receiving and sending routes of the non-reference optical fiber channels are inconsistent, if the reference channel adopts a special mode, the differential protection device is selected to lock the non-reference optical fiber channels; if the reference channel selects the multiplexing mode, the differential protection device is selected to lock the multiplexing optical fiber channel after the alarm multiplexing optical fiber channel receiving and sending routes are inconsistent.
Further, the main control unit controls the reference optical fiber channel to complete sampling synchronization of the local terminal and the opposite terminal, including:
the two-end main control unit of the reference optical fiber channel selects one end as a main end and the other end as a slave end according to the sampling stability of the two ends; the main control unit of the master end sends sampling data and sampling labels through the optical fiber channel and simultaneously sends synchronous instructions, the master control unit of the slave end carries out deviation calculation of sampling moments at two sides according to the synchronous instructions of the master end, the sampling labels and the sampling data obtained from the optical fiber channel, the sampling moments of the slave end are adjusted in a mode of adjusting the sampling deviations, and finally, synchronization of two ends is achieved, and the master end is informed to enter a synchronization state after the synchronization adjustment is completed, so that the synchronous data calculation of differential protection of the two ends is realized.
The main control unit controls the non-reference optical fiber channel to complete the virtual synchronization of the local terminal and the opposite terminal, and comprises: the main control units at two ends of the non-reference optical fiber channel and the reference optical fiber channel are kept consistent, one end of the main control unit is selected as a main end, and the other end of the main control unit is selected as a slave end; the main control unit of the main end sends sampling data and sampling labels through the optical fiber channel and simultaneously sends virtual synchronous instructions, the main control unit of the auxiliary end carries out deviation calculation of sampling moments at two sides according to the main synchronous instructions, the sampling labels and the sampling data acquired from the optical fiber channel, calculates time deviation required to be adjusted when synchronization at two ends is achieved, and does not carry out actual synchronous adjustment process.
In summary, the present invention relates to a method for identifying routing consistency of a multiplexed fiber channel and a differential protection device, which determine whether two fiber channels are required to be input and at least one is a multiplexed fiber channel, and if the two fiber channels are required to be input, determine whether data reception of the two fiber channels is normal, if the two fiber channels are normal, select a reference fiber channel; the method comprises the steps that a reference optical fiber channel completes sampling synchronization of a local terminal and an opposite terminal to obtain reference optical fiber sampling time deviation, a non-reference optical fiber channel serves as a virtual reference channel to complete sampling synchronization of the local terminal and the opposite terminal to obtain non-reference optical fiber sampling time deviation; and comparing according to the sampling time deviation of the two optical fiber channels, and judging the consistency of the receiving and sending routes of the multiplexing optical fiber channels. The invention can realize the real-time monitoring of the operation condition of the used multiplexing optical fiber channel by upgrading software for differential protection without adding extra channel equipment, and can give real-time early warning for the condition that the receiving and sending routes of the multiplexing optical fiber channel are inconsistent, thereby effectively improving the reliability of the optical fiber current differential protection.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (11)
1. A method for identifying routing consistency of a multiplexing fiber channel is characterized by comprising the following steps:
(1) judging whether two optical fiber channels are input and at least one optical fiber channel is a multiplexing optical fiber channel, if so, entering the step (2), and if not, finishing the identification;
(2) judging whether the data reception of the two optical fiber channels is normal or not, if so, entering the step (3), and if not, finishing the identification;
(3) selecting a reference optical fiber channel;
(4) the method comprises the steps that sampling synchronization of a local terminal and an opposite terminal is completed through a reference optical fiber channel, reference optical fiber sampling time deviation is obtained, a non-reference optical fiber channel is used as a virtual reference channel to perform virtual synchronization of the local terminal and the opposite terminal, synchronous sampling is performed, and non-reference optical fiber sampling time deviation is obtained;
(5) comparing according to the sampling time deviation of the two optical fiber channels, and judging the consistency of the receiving and sending routes of the multiplexing optical fiber channels;
selecting a reference fiber channel includes:
if the channel mode is set as a special mode, the channel is accessed into an optical fiber channel with fixed and consistent transmitting and receiving routes, and the channel is a special mode optical fiber channel or a two-fiber bidirectional multiplexing section switching ring; if the channel mode is set as a multiplexing mode, the channel is accessed to a fiber channel with unfixed and consistent transmitting and receiving routes;
if one special optical fiber channel and the other optical fiber channel are multiplexed, selecting the special optical fiber channel as a reference optical fiber channel;
if the two are both multiplexing optical fiber channels, preferentially selecting the multiplexing optical fiber channel where the two-fiber bidirectional multiplexing section switching ring with better routing consistency is located as a reference optical fiber channel;
if the two channel grid structures are the same or the grid structure is ambiguous, the fiber channel with the shorter channel delay is preferentially selected as the reference fiber channel.
2. The method according to claim 1, wherein the fiber current differential protection device performs the identification of the inconsistency of the routing of the transmission and reception of the multiplexed fiber channel after the fiber current differential protection device is powered on or the change of the channel delay exceeds a predetermined threshold.
3. The method of claim 1, wherein the step of determining whether two fibre channels are put into use and at least one of the two fibre channels is a multiplexed fibre channel comprises: reading the input channel fixed value, judging whether the channel fixed value comprises a multiplexing optical fiber channel, reading the control word to determine the quantity of the input optical fiber channels, and reading the on-off condition of the pressing plate to determine the input multiplexing optical fiber channel.
4. The method of claim 1, wherein determining whether the data reception of the two fibre channels is normal comprises: and monitoring data receiving and sending of the two optical fiber channels, when no channel is interrupted in receiving, no channel is in mixed connection, no device is in mixed connection, and the channel delay length meets the requirement of a threshold value, indicating that the data receiving is normal, otherwise, judging that the data receiving is abnormal, and outputting alarm information.
5. The identification method for consistency of routing of multiplexed fibre channel as recited in claim 1, wherein if consistency of two fibre channels does not meet requirements, then: when the reference channel selects a channel which fixedly meets the consistency of the receiving and sending routes, the inconsistency of the receiving and sending routes of the non-reference optical fiber channel is alarmed; and if the reference channel selects a channel which is not fixed and meets the consistency of the receiving and sending routes, the receiving and sending routes of the multiplexing optical fiber channel are not consistent.
6. The method according to claim 5, wherein when the reference channel selects a channel that is fixed to satisfy the consistency of the transceiving routes, and the non-reference fiber channel is reported to be inconsistent in transceiving routes, the differential protection device can be selected to lock the non-reference fiber channel; when the reference channel selects a channel which is not fixed and meets the consistency of the receiving and sending routes, the differential protection device can be selected to lock the two multiplexing optical fiber channels after the receiving and sending routes of the alarm multiplexing optical fiber channels are inconsistent.
7. A differential protection device with a multiplexing fiber channel route consistency identification method function is characterized by comprising a reading unit, a monitoring unit and a main control unit;
the reading unit reads the input channel fixed value, judges whether the channel fixed value comprises a multiplexing optical fiber channel, reads the control word to determine the number of the input optical fiber channels, reads the on-off condition of the pressing plate to determine the input multiplexing optical fiber channel, and sends the multiplexing optical fiber channel to the main control unit;
the monitoring unit monitors data receiving and sending of the two optical fiber channels, judges whether the data receiving of the two optical fiber channels is normal or not, and sends a judgment result to the main control unit;
the main control unit judges whether two optical fiber channels are input and at least one optical fiber channel is a multiplexing optical fiber channel, and if the two optical fiber channels are not input, the identification is finished; if the data is not received normally, the identification is finished, and if the data is not received normally, a reference optical fiber channel is selected; the main control unit controls the reference optical fiber channel to complete sampling synchronization of a local terminal and an opposite terminal, and acquires reference optical fiber sampling time deviation; the main control unit controls the non-reference optical fiber channel to serve as a virtual reference channel to perform virtual synchronization of a local terminal and an opposite terminal, synchronous sampling is performed, and non-reference optical fiber sampling time deviation is obtained; the main control unit controls the comparison according to the sampling time deviation of the two optical fiber channels and judges the consistency of the receiving and sending routes of the multiplexing optical fiber channels;
the main control unit selects a reference optical fiber channel and comprises:
the main control unit supports mode parameters of externally input optical fiber channels, and obtains the operation modes of two accessed optical fiber channels by reading the input channel mode parameters; if the channel mode is set as a special mode, the channel is accessed into an optical fiber channel with a fixed and consistent transmitting-receiving route, and the channel is an optical fiber channel in the special mode or a two-fiber bidirectional multiplexing section switching ring; if the channel mode is set as a multiplexing mode, the channel is accessed to a fiber channel with unfixed and consistent transmitting and receiving routes;
if one special optical fiber channel and the other optical fiber channel are multiplexed, selecting the special optical fiber channel as a reference optical fiber channel;
if the two are both multiplexing optical fiber channels, preferentially selecting the multiplexing optical fiber channel where the two-fiber bidirectional multiplexing section switching ring with better routing consistency is located as a reference optical fiber channel;
if the two channel grid structures are the same or the grid structure is ambiguous, the fiber channel with the shorter channel delay is preferentially selected as the reference fiber channel.
8. The differential protection device with the identification method function of the routing consistency of the multiplexing optical fiber channels according to claim 7, wherein if the master control unit determines that the consistency of the two optical fiber channels does not meet the requirement, the master control unit: if the reference optical fiber channel selects a channel with fixed and consistent receiving and transmitting routes, the non-reference optical fiber channel is alarmed that the receiving and transmitting routes are inconsistent; and if the reference optical fiber channel transceiving routes cannot be fixed to the same channel, selecting the optical fiber channel with shorter channel delay as the reference optical fiber channel, and alarming that the multiplexing optical fiber channel transceiving routes are not the same.
9. The differential protection device with the identification method function of routing consistency of multiplexing optical fiber channels according to claim 8, wherein when the reference channel selects the channel with fixed and consistent routing, the main control unit selects the differential protection device to lock the non-reference optical fiber channel after the non-reference optical fiber channel is alarmed by the main control unit that the routing is inconsistent; when the reference channel selects the channel whose receiving and sending routes can not be fixed to be consistent, after the alarm multiplexing optical fiber channel receiving and sending routes are inconsistent, the differential protection device is selected to lock the two multiplexing optical fiber channels.
10. The differential protection device with the identification method for routing consistency of a multiplexing optical fiber channel according to claim 7, wherein the main control unit controls the reference optical fiber channel to complete sampling synchronization between the local terminal and the opposite terminal, and comprises:
selecting one end of a main control unit at two ends of a reference optical fiber channel as a main end and the other end of the main control unit as a slave end; the main control unit of the main end sends sampling data and sampling labels through a reference optical fiber channel and simultaneously sends a synchronous instruction; and the slave end main control unit performs deviation calculation of sampling moments at two sides according to the master end synchronous instruction, the sampling label and the sampling data acquired from the optical fiber channel, adjusts the sampling moments of the slave ends in a sampling deviation adjusting mode to achieve synchronization of the two ends, and informs the master end main control unit to enter a synchronization state after the synchronization adjustment is completed.
11. The differential protection device with the identification method for routing consistency of multiplexing optical fiber channels according to claim 7, wherein the main control unit controls the non-reference optical fiber channels to complete virtual synchronization between the home terminal and the opposite terminal, and comprises: selecting one end of a main control unit at two ends of a non-reference optical fiber channel as a main end and the other end of the main control unit as a slave end; the main control unit of the main end sends sampling data and sampling labels through an optical fiber channel and sends virtual synchronization instructions at the same time; and the slave end main control unit performs deviation calculation of sampling moments at two sides according to the master end synchronous instruction, the sampling label and the sampling data acquired from the optical fiber channel, and calculates time deviation required to be adjusted to achieve synchronization of the two ends, but does not perform actual synchronization adjustment.
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| CN114050559A (en) * | 2021-11-18 | 2022-02-15 | 南京南瑞继保电气有限公司 | Method and device for judging inconsistency of receiving and transmitting delays of differential channel and differential protection communication system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6104732A (en) * | 1997-10-24 | 2000-08-15 | G-2 Networks, Inc. | Integrated signal routing circuit |
| US6631134B1 (en) * | 1999-01-15 | 2003-10-07 | Cisco Technology, Inc. | Method for allocating bandwidth in an optical network |
| CN1565098A (en) * | 2001-08-10 | 2005-01-12 | 马科尼通讯有限公司 | Communications network |
| CN101540500A (en) * | 2009-04-28 | 2009-09-23 | 南京中德保护控制系统有限公司 | Data synchronization method of digital optical fiber differential protective clock by relay method |
| CN104701826A (en) * | 2015-03-16 | 2015-06-10 | 国家电网公司 | Optical fiber bidirectional time delay inconsistency discriminating and differentiating method |
| CN204464977U (en) * | 2015-03-02 | 2015-07-08 | 国家电网公司 | A kind ofly realize the transmitting-receiving of current differential protection passage with the self-healing device in path |
| CN111030066A (en) * | 2019-12-18 | 2020-04-17 | 南京国电南自电网自动化有限公司 | Line differential protection method based on switching of optical fiber channel and wireless channel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680427B (en) * | 2016-03-16 | 2019-02-22 | 华中电网有限公司 | The transmission line of electricity optical fibre differential protection method more adapted to |
-
2020
- 2020-10-29 CN CN202011181403.2A patent/CN112422180B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6104732A (en) * | 1997-10-24 | 2000-08-15 | G-2 Networks, Inc. | Integrated signal routing circuit |
| US6631134B1 (en) * | 1999-01-15 | 2003-10-07 | Cisco Technology, Inc. | Method for allocating bandwidth in an optical network |
| CN1565098A (en) * | 2001-08-10 | 2005-01-12 | 马科尼通讯有限公司 | Communications network |
| CN101540500A (en) * | 2009-04-28 | 2009-09-23 | 南京中德保护控制系统有限公司 | Data synchronization method of digital optical fiber differential protective clock by relay method |
| CN204464977U (en) * | 2015-03-02 | 2015-07-08 | 国家电网公司 | A kind ofly realize the transmitting-receiving of current differential protection passage with the self-healing device in path |
| CN104701826A (en) * | 2015-03-16 | 2015-06-10 | 国家电网公司 | Optical fiber bidirectional time delay inconsistency discriminating and differentiating method |
| CN111030066A (en) * | 2019-12-18 | 2020-04-17 | 南京国电南自电网自动化有限公司 | Line differential protection method based on switching of optical fiber channel and wireless channel |
Non-Patent Citations (2)
| Title |
|---|
| Distance Adaptive Routing, Core and Spectrum Allocation in Space Division Multiplexing Optical Networks with Multi-Core Fibers;Yuanlong Tan;《 2016 Asia Communications and Photonics Conference (ACP)》;20190404;全文 * |
| 光纤复用保护通道传输时延差指标研究;滕玲;《电信科学》;20101210;全文 * |
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