CN109831246A - A kind of route equation of light synchronous method based on HSR - Google Patents
A kind of route equation of light synchronous method based on HSR Download PDFInfo
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- CN109831246A CN109831246A CN201910145080.2A CN201910145080A CN109831246A CN 109831246 A CN109831246 A CN 109831246A CN 201910145080 A CN201910145080 A CN 201910145080A CN 109831246 A CN109831246 A CN 109831246A
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Abstract
The invention discloses a kind of route equation of light synchronous method based on HSR, comprising the following steps: establish bidirectional redundancy Crossed Circle network structure；Looped network Time delay measurement；Sampling data synchronization processing；Ring-network topology monitoring；State quantity data transmission.The present invention is using mature HSR technology, and sample-synchronous scheme does not depend on synchronous clock source, and synchronization accuracy height is, it can be achieved that N(N >=2) end is differential.Do not consider communication channel delay, when device node is not more than 16 in looped network, delay time of the message in looped network is not more than 1ms.Using the Network Connection of HSR, the self-cure type looped network of long range, and network node flexible configuration may be implemented, it is easy to maintain.
Description
Technical field
The present invention relates to a kind of route equation of light synchronous method based on HSR.
Background technique
For optical fiber differential protective, it is key problem that data, which synchronize,.Time adjusting method and sampled data are mainly used at present
Adjusting method.The former uses slave mode, and host calculates channel as synchronous end, by table tennis algorithm as reference end, slave
Delay, and sampling instant is adjusted by the sampling instant of main side, to achieve the purpose that two side datas are synchronous.It is poor in synchronizing process
Dynamic protection automatically exits from.Due to only doing small stride adjustment every time, synchronizing process is longer.When especially host has frequency adjustment.Frequency
It adjusts excessive, will cause a moment step-out.The latter is regardless of slave, and respective independent sample, each frame data are all according to communication channel delay
Data correction is carried out, to achieve the purpose that two side datas are synchronous.It can be extensive quickly after communication because of interference is interrupted or lost and synchronizes
It is multiple.Because transmitting vector rather than sampled instantaneous value, it is only applicable to steady-state quantity current differential, is not suitable for the difference based on fault component
Dynamic protection.Both the above mode is to calculate communication channel delay using table tennis algorithm, has dedicated HDLC protocol to realize the transmission of data
With synchronous, the neither synchronization differential suitable for multiterminal.
Using time adjusting method and sampled data adjusting method, independent of external clock, but it is differential to be applied to multiterminal.
The differential synchronization of multiterminal may be implemented in GPS Synchronos method, and precision is high, but is limited by external environment, due to protective relaying device
Particularity, this method cannot function as the unique synchronous method of protective device.Therefore, realize that the mode of multiterminal DG synchro needs
Research.
It is domestic at present differential to two ends and three ends by the way of point-to-point direct connection, to four ends or more it is differential not yet
Preferable solution.Realizing that multiterminal are differential not only will externally interact sampled data, it is also necessary to swap status amount data, to guarantee
Reliability should be able to realize channel redundancy.Therefore, it requires study suitable for the external interface mode and network topology of multiterminal data.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, a kind of route light based on HSR is provided
Poor synchronous method carries out the synchronization and transmission of data between more devices, realizes self-cure type looped network.HSR is site element protection
Process layer interconnection technique, realize that GOOSE net, SV net and looped network manage message using gigabit Ethernet, HSR realizes multiterminal dress
The synchronization and data interaction set.
In order to solve the above technical problems, the present invention provides a kind of route equation of light synchronous method based on HSR, characterized in that
The following steps are included:
Bidirectional redundancy Crossed Circle network structure is established, two loop networks are independent mutually；In each group of looped network, node and node it
Between join end to end to form bidirectional redundancy ring by Ethernet sequence；
Looped network Time delay measurement: looped network introduces the concept in message delay amendment domain, carries its delay time by message itself；Pass through report
The sending time stamp and receiving time stamp that the delayed data and link delay message that text carries are recorded, are returned based on link transmit-receive
Link delay is calculated using balanced method under the premise of road delay is consistent；
Sampling data synchronization processing: by each handset on looped network according to unified fixed sample rate but the SV number of respective asynchronous-sampling
It is calculated according to delay accurate compensation；
Ring-network topology monitoring: management message traverses all link and nodes, in open loop or is switched to single net net operation Shi Nengfa
It alerts out；
State quantity data transmission: the position of the switch, differential permission, remote jump, CT are broken and is sent to each handset by GOOSE net.
Further, in the bidirectional redundancy ring each node be peer-to-peer, be responsible for ring in message forwarding, filtering and
The broadcast transmission of this nodal information.
Further, each handset external interface on the loop network includes data message and management message.
Further, the data message include the transmission of local sample data, the forwarding of other handset sampled datas with
It receives, the exchange of state quantity data.
Further, the transmission of the sampled data is transmitted using IEC61850-9-2 specification, and state quantity data uses
GOOSE mode is transmitted.
Further, the management message includes the request and response, looped network monitoring frame of delay time message.
Further, the SV data delay accurate compensation calculates method particularly includes: with the data sampling of place node
On the basis of, it is 24 point protection logic data by received 80 point SV data resamplings according to link delay.
Further, the sample rate of the handset is 80 points of every cycle.
Advantageous effects of the invention: using mature HSR technology, sample-synchronous scheme does not depend on synchronised clock
Source, synchronization accuracy height, it can be achieved that N(N >=2) end it is differential.Do not consider communication channel delay, device node is not more than 16 in looped network
When, delay time of the message in looped network is not more than 1ms.Have the advantage that engineer application is flexible and compatibility is strong, has extensively
Dissemination.Using the Network Connection of HSR, the self-cure type looped network of long range may be implemented, and network node is flexibly matched
It sets, it is easy to maintain.
Specific embodiment
The invention will be further described below.Following embodiment is only used for clearly illustrating technical side of the invention
Case, and not intended to limit the protection scope of the present invention.
The present invention use HSR network topology structure and communication mechanism, adopt HSR type of message and format and other
Mature technology realizes N(N >=2) end optical fiber differential protective.It is specific as follows:
1. establishing bidirectional redundancy Crossed Circle network structure, two loop networks are independent mutually；In each group of looped network, node and node
Between join end to end to form bidirectional redundancy ring by Ethernet sequence.Each node is peer-to-peer in ring, is responsible for message in ring
The broadcast transmission of forwarding, filtering and this nodal information.
2. the path delay of time and residence time can be accurate to ns using the looped network Time delay measurement technology of HSR.Looped network introduces message
The concept of delay amendment domain (FTCF), carries its delay time by message itself；The delayed data and chain carried by message
The sending time stamp and receiving time stamp that road delay message (i.e. latency request and delayed response message) is recorded, are received based on link
Send back to road delay it is consistent under the premise of link delay calculated using balanced method.
3. using the sampling value synchronization technology of HSR, that is, make full use of aforementioned delay can survey technology, by each handset according to unified
The SV data delay accurate compensation calculating of fixed sample rate but respectively asynchronous-sampling, is substantially a kind of point-to-point sampling skill
The networked instruments of art.What SV data delay accurate compensation calculated method particularly includes: on the basis of the data sampling of place node,
It is 24 point protection logic data by received 80 point SV data resamplings according to link delay.
4. can quickly and accurately reflect each device node two sides in looped network using the ring-network topology surveillance technology of HSR
The on-off system state of port.When looped network exception occurs and is switched to single net operation, defencive function is unaffected, and reception can
Issue alarm.
5. such as position of the switch, differential permission is remote to jump using the state quantity data transmission mode of HSR, CT broken string etc. passes through
GOOSE net is sent to each handset.
Each handset external interface on looped network includes data message and management message.Data message includes: local sample
The transmission of data, the forwarding and reception of other handset sampled datas, the exchange etc. of state quantity data.Management message includes: delay
The request and response of time message, looped network monitor frame etc..The transmission of sampled data is transmitted using IEC61850-9-2 specification, state
Amount data are transmitted using GOOSE mode.
The analog data of each handset acquisition is gradually transmitted to all handsets by next stage handset, receives other sons
The data of machine will appear different degrees of delay.Processing must be synchronized to the sampled data of each handset, after eliminating delay
For differential protection operation.The own sampling of each handset, it is synchronous by the laggard row interpolation of amendment sampling time delay.Due to interpolation to be carried out
It is synchronous, usually every cycle 80 point more demanding to the sample rate of handset.Since site route protection is actually integrated with this
The combining unit and intelligent terminal function at interval, 80 point sampling data of transmission are possibly realized.Since each handset sample rate is high, SV report
The data traffic of text is larger, causes the traffic load in HSR bidirectional loop network network very big.It therefore must be logical using special optic fibre
Road, transmission speed and transmission data volume can be infinity.
For each handset without master-slave, software and hardware structure is identical.Above-mentioned most of function is realized by FPGA, such as: ADC analog quantity
High speed acquisition and SV message transmission, the synchronization process of each handset sampled data, the communication process of each network interface, gigabit ring
Network control system, network storm processing are managed with message, process layer packet parsing, data storage and forwarding etc..CPU obtains same from FPGA
The sampled data of step carries out relay protective scheme calculating.Therefore, although workload increase is very compared with traditional differential protection
More, the load factor of CPU is but without increase.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of route equation of light synchronous method based on HSR, characterized in that the following steps are included:
Bidirectional redundancy Crossed Circle network structure is established, two loop networks are independent mutually；In each group of looped network, node and node it
Between join end to end to form bidirectional redundancy ring by Ethernet sequence；
Looped network Time delay measurement: looped network introduces the concept in message delay amendment domain, carries its delay time by message itself；Pass through report
The sending time stamp and receiving time stamp that the delayed data and link delay message that text carries are recorded, are returned based on link transmit-receive
Link delay is calculated using balanced method under the premise of road delay is consistent；
Net topology monitoring: management message traverses all link and nodes, in open loop or is switched to when single net nets operation and can issue
Alarm；
State quantity data transmission: the position of the switch, differential permission, remote jump, CT are broken and is sent to each handset by GOOSE net.
2. a kind of route equation of light synchronous method based on HSR according to claim 1, characterized in that the bidirectional redundancy
Each node is peer-to-peer in ring, the forwarding, filtering of message and the broadcast transmission of this nodal information in responsible ring.
3. a kind of route equation of light synchronous method based on HSR according to claim 1, characterized in that the loop network
On each handset external interface include data message and management message.
4. a kind of route equation of light synchronous method based on HSR according to claim 3, characterized in that the data message
The forwarding of transmission, other handset sampled datas including local sample data and reception, state quantity data exchange.
5. a kind of route equation of light synchronous method based on HSR according to claim 4, characterized in that the sampled data
Transmission transmitted using IEC61850-9-2 specification, state quantity data is transmitted using GOOSE mode.
6. a kind of route equation of light synchronous method based on HSR according to claim 3, characterized in that the management message
Request and response, looped network including delay time message monitor frame.
7. a kind of route equation of light synchronous method based on HSR according to claim 1, characterized in that the SV data are prolonged
When accurate compensation calculate method particularly includes: on the basis of the data sampling of place node, according to link delay, by what is received
80 point SV data resamplings are 24 point protection logic data.
8. a kind of route equation of light synchronous method based on HSR according to claim 1, characterized in that the handset is adopted
Sample rate is 80 points of every cycle.
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Cited By (1)
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| CN112039035A (en) * | 2020-08-10 | 2020-12-04 | 南京电研电力自动化股份有限公司 | Optical fiber communication system and method based on 2M conventional channel |
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