CN106788690B - Multistage route Unit protection system and method - Google Patents
Multistage route Unit protection system and method Download PDFInfo
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- CN106788690B CN106788690B CN201611019428.6A CN201611019428A CN106788690B CN 106788690 B CN106788690 B CN 106788690B CN 201611019428 A CN201611019428 A CN 201611019428A CN 106788690 B CN106788690 B CN 106788690B
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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
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
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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
- H04B10/25—Arrangements specific to fibre transmission
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Abstract
The invention discloses a kind of multistage route Unit protection system and methods.The multistage route includes: Bulk Supply Substation, several from substation, and is connected to Bulk Supply Substation and from the transmission line of electricity between substation, the system comprises: protected host, protection slave, optical line terminal, optical network unit and optical fiber；Protected host and optical line terminal are set in the Bulk Supply Substation；Slave and optical network unit is protected to be set to out of substation；Protected host is connect by optical line terminal with optical fiber；Protection slave is connect by optical network unit with optical fiber.The present invention utilizes the time-delay characteristics and network scalability of the fast and stable of the point-to-point communication of Ethernet passive optical network; one optical line terminal can be by being communicated between passive optical splitters and multiple optical network units; it can flexible expansion multi-point circuit Unit protection slave number; realize the Unit protection of multiterminal transmission line of electricity, the distal end configuration of realization device and information are called.
Description
Technical field
The present invention relates to Relay Protection Technology in Power System field, in particular to a kind of multistage route Unit protection system
System and method.
Background technique
With the propulsion of Chinese Urbanization development process, urban land resource growing tension, transmit electricity gallery and switchyard choosing
Location is increasingly difficult, more and more T routes occurs in urban power network planning construction, multistage T even occurs and connect (π connects) line
Road.The corresponding increasingly complicated mode of connection, route protection especially main protection need to reconfigure.
Longitudinal differential protection system is to make a kind of protective device of two sides switch while fast trip when line failure,
It is the main protection of route.Unit protection is the fault direction that alternative route both ends are respectively seen, is line-internal with judgement
Failure or external fault.If using the fault direction seen when protected circuit internal fault as positive direction, then when being protected
When route external fault, always there is side it is seen that opposite direction.
For traditional double line terminal, main protection usually configures differential protection or Unit protection.Traditional pilot direction
Protection generallys use carrier channel or optical-fibre channel as communication channel.Since carrier channel anti-interference ability is poor, have gradually
The trend replaced by optical-fibre channel.But optical-fibre channel is typically due to using point-to-point mode, if being used for multi-point circuit, can be expanded
Malleability is relatively poor.
Summary of the invention
Goal of the invention of the invention is to provide a kind of multistage route Unit protection system and method, solution multi-section-line
The problem of road Unit protection scalability difference.
According to embodiments of the present invention in a first aspect, providing a kind of multistage route Unit protection system, the multistage
Route includes: Bulk Supply Substation equipped with main bus-bar and main circuit breaker, equipped with from bus and from the several from substation of breaker, with
And be connected to the Bulk Supply Substation and the transmission line of electricity between substation, the system comprises: protected host, protection from
Machine, optical line terminal, optical network unit and optical fiber；
The protected host and the optical line terminal are set in the Bulk Supply Substation；
The protection slave and the optical network unit are set to described out of substation；
The protected host is connect by the optical line terminal with the optical fiber；
The protection slave is connect by the optical network unit with the optical fiber；
The optical fiber is made of a fibre core.
The protected host is used to obtain Fisrt fault discriminating direction result according to the main bus-bar；Receive the second failure side
To differentiation result；Differentiate that result judges the multistage according to the Fisrt fault discriminating direction result and second fault direction
Whether route breaks down；If the multistage line failure, the protected host issues the main circuit breaker and institute
State the trip signal from breaker；
The protection slave is used to differentiate result from synchronous acquisition second fault direction of bus according to described.
Further, in the multistage route Unit protection system, the optical line terminal and the optical-fiber network
Unit only transmits commercial data.
Further, in the multistage route Unit protection system, the optical line terminal and the optical-fiber network
Unit is made of special chip or field programmable gate array.
Second aspect according to embodiments of the present invention provides a kind of multistage route Unit protection method, for above-mentioned
Multistage route Unit protection system, the described method comprises the following steps:
The protected host obtains Fisrt fault discriminating direction result according to main bus-bar；
The protected host receives the second fault direction and differentiates as a result, second fault direction differentiates the result is that the guarantor
It protects slave and synchronizes acquisition from bus according to described；
The protected host differentiates that result is sentenced according to the Fisrt fault discriminating direction result and second fault direction
Whether the multistage route that breaks breaks down；
If the multistage line failure, the protected host issues the main circuit breaker and described from breaker
Trip signal.
Further, in the multistage route Unit protection method, the protected host receives the second fault direction
Differentiate as a result, specifically: sentenced between the optical line terminal and the optical network unit by proprietary protocol exchange trouble direction
Other result information, or SMV, GOOSE message and MMS message are exchanged by 61850 agreement of IEC.
Further, in the multistage route Unit protection method, the optical line terminal and the optical-fiber network list
SMV, GOOSE message and MMS message are exchanged by 61850 agreement of IEC between member, specifically: the SMV, the GOOSE report
The literary and described MMS message bandwidth allocation is using the method for fixing polling cycle and Dynamic Bandwidth Allocation.
Further, in the multistage route Unit protection method, the SMV, GOOSE message and MMS message band
The method that width distribution uses fixed polling cycle and Dynamic Bandwidth Allocation, specifically:
A kind of new REPORT is arranged to upload and/or GATE issuing mechanism, upstream bandwidth is divided into the SMV, described
Three priority, the SMV highest priority are arranged in GOOSE message, the MMS message three classes, and the GOOSE message is taken second place,
The MMS message is minimum.
Further, in the multistage route Unit protection method, second fault direction differentiates the result is that institute
It states protection slave and synchronizes acquisition from bus according to described, specifically: use 1588 clock synchronization mode of compensation of delay means or IEEE
Realize that sample information is synchronous.
Further, described to use compensation of delay means or IEEE in the multistage route Unit protection method
1588 clock synchronization modes realize that sample information is synchronous, specifically:
The optical line terminal according to internal crystal oscillator, be synchronized with external GPS or big dipper clock, export pulse per second (PPS) or to Times
Text is to the protected host；
The sampling pulse of the protected host is synchronized with pulse per second (PPS) or the clock synchronization message of the optical line terminal；
The optical network unit is realized by the pulse per second (PPS) of compensation of delay means or IEEE 1588 and the optical line terminal
Synchronous clock synchronization, and export pulse per second (PPS) or clock synchronization message；
The sampling pulse of the protection slave is synchronized with pulse per second (PPS) or the clock synchronization message of the optical network unit.
From the above technical scheme, a kind of multistage route Unit protection system and method provided by the invention.Institute
Stating multistage route includes: Bulk Supply Substation equipped with main bus-bar and main circuit breaker, equipped with from bus and from the several from change of breaker
Power station, and it is connected to the Bulk Supply Substation and the transmission line of electricity between substation, the system comprises: protection master
Machine, protection slave, optical line terminal, optical network unit and optical fiber；The protected host and the optical line terminal are set to described
In Bulk Supply Substation, the protection slave and the optical network unit are set to described out of substation, and the protected host passes through institute
It states optical line terminal to connect with the optical fiber, the protection slave is connect by the optical network unit with the optical fiber, described
Optical fiber is made of a fibre core.The described method includes: protected host obtains Fisrt fault discriminating direction result according to main bus-bar；Institute
State protected host receive the second fault direction differentiate as a result, second fault direction differentiate the result is that the protection slave according to
It is described to synchronize acquisition from bus；The protected host is according to the Fisrt fault discriminating direction result and the second failure side
Judge whether the multistage route breaks down to differentiation result.The present invention utilizes the point-to-point communication of Ethernet passive optical network
Fast and stable time-delay characteristics and network scalability, an optical line terminal can pass through passive optical splitters and multiple light nets
Communicated between network unit, the present invention can flexible expansion multi-point circuit Unit protection slave number, realize multiterminal transmission of electricity
The Unit protection of route；And on the basis of the fast and reliable transmission of SMV, GOOSE message, moreover it is possible to MMS message is transmitted, it is real
The distal end configuration of existing device and information are called.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of multistage route Unit protection system structure diagram exemplified according to implementation；
Fig. 2 is another multistage route Unit protection system structure diagram exemplified according to implementation；
Fig. 3 is a kind of multistage route Unit protection method flow diagram exemplified according to implementation；
Fig. 4 is according to the schematic diagram for implementing the fixation polling cycle exemplified and dynamic bandwidth allocation mechanism.
It illustrates:
Wherein, 1- Bulk Supply Substation, 2- main bus-bar, 3- main circuit breaker, 4- protected host, 5- transmission line of electricity, 6- optical fiber, 7- from
Substation, 8- protect slave, 11- optical line terminal, 12- optical network unit from breaker, 10- from bus, 9-.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
According to the first aspect of the invention, a kind of multistage route Unit protection system is provided.
Embodiment one
Referring to Fig. 1, present embodiments providing a kind of multistage route Unit protection system, the multistage route packet
It includes: Bulk Supply Substation 1 equipped with main bus-bar 2 and main circuit breaker 3, equipped with from bus 8 and from the several from substation 7 of breaker 9, with
And it is connected to the Bulk Supply Substation 1 and the transmission line of electricity 5 between substation 7, and the system comprises: protected host 4 is protected
Protect slave 10, optical line terminal 11, optical network unit 12 and optical fiber 6；
The protected host 4 and the optical line terminal 11 are set in the Bulk Supply Substation 1；
The protection slave 10 and the optical network unit 12 are set to described out of substation 7；
The protected host 4 is connect by the optical line terminal 11 with optical fiber 6；
The protection slave 10 is connect by the optical network unit 12 with optical fiber 6；
The optical fiber 6 is made of a fibre core；
The protected host 4 is used to obtain Fisrt fault discriminating direction result according to main bus-bar 2；Receive the second fault direction
Differentiate result；Differentiate that result judges the multi-section-line according to the Fisrt fault discriminating direction result and second fault direction
Whether break down on road；If the multistage line failure, the protected host 4 issues the main circuit breaker 3 and institute
State the trip signal from breaker 9；
The protection slave 10 is used to differentiate result from synchronous second fault direction that obtains of bus 8 according to described.
The course of work of a kind of multistage route Unit protection system of the invention are as follows: protection slave 10 is obtained by synchronizing
It takes and is differentiated from the second fault direction of bus 8 as a result, and it is sent to protected host 4 by passive optical network in real time.Protection master
The second fault direction that the Fisrt fault discriminating direction result and light protection slave 10 that machine 4 is acquired according to main bus-bar 2 transmit differentiates
As a result to judge whether the multistage route breaks down.If multistage line failure, main circuit breaker 3 is jumped and from breaker 9
With isolated fault.
The present invention can be expanded using the time-delay characteristics and network of the fast and stable of the point-to-point communication of Ethernet passive optical network
Malleability, an optical line terminal can be by being communicated between passive optical splitters and multiple optical network units, and the present invention can spirit
Extension multi-point circuit Unit protection slave number living, realizes the Unit protection of multiterminal transmission line of electricity；And SMV,
On the basis of the fast and reliable transmission of GOOSE message, moreover it is possible to transmit MMS message, the distal end configuration of realization device and information are called.
Further, in the multistage route Unit protection system, the optical line terminal 11 and the light net
12 transmission commercial datas of network unit.The optical line terminal 11 and optical network unit 12 for supporting Ethernet passive optical network are different from
It is conventionally used to family online, only transmits the optical line terminal 11 and optical network unit 12 of commercial data, management function can phase
To simplification, quick, the reliable transmission of the high-precise synchronization and message between optical line terminal 11 and optical network unit 12 are realized.
Further, in the multistage route Unit protection system, the optical line terminal 11 and the light net
Network unit 12 is made of special chip or field programmable gate array.12 management function phase of optical line terminal 11 and optical network unit
To simplification, quick, the reliable transmission of high-precise synchronization and message between existing optical line terminal 11 and optical network unit 12.
Embodiment two
Referring to Fig. 2, another multistage route Unit protection system is present embodiments provided, in optical line terminal 11
It is placed in the protected host 4；Optical network unit 12 is built in the protection slave 10；Multistage circuit longitudinal provided in this embodiment
The multistage route Unit protection system that the other structures of direction protection system are provided referring to embodiment one, it is no longer superfluous herein
It states.
From the above technical scheme, a kind of multistage route Unit protection system provided by the invention.The multistage
Route includes: Bulk Supply Substation 1 equipped with main bus-bar 2 and main circuit breaker 3, equipped with from bus 8 and from the several from power transformation of breaker 9
It stands 7, and is connected to the Bulk Supply Substation 2 and the transmission line of electricity 5 between substation 7, the system comprises: protection master
Machine 4, protection slave 10, optical line terminal 11, optical network unit 12 and optical fiber 6；The protected host 4 and the optical line terminal
11 are set in the Bulk Supply Substation 1；The protection slave 10 and the optical network unit 12 are set to described out of substation 7；Institute
Protected host 4 is stated to connect by the optical line terminal 11 with optical fiber 6；The protection slave 10 passes through the optical network unit 12
It is connect with optical fiber 6；The optical fiber 6 is made of a fibre core.The present invention utilizes the point-to-point communication of Ethernet passive optical network
The time-delay characteristics and network scalability of fast and stable, an optical line terminal can pass through passive optical splitters and multiple optical-fiber networks
Communicated between unit, the present invention can flexible expansion multi-point circuit Unit protection slave number, realize multiterminal power transmission line
The Unit protection on road；And on the basis of the fast and reliable transmission of SMV, GOOSE message, moreover it is possible to transmit MMS message, realize
The distal end configuration of device and information are called.
According to the second aspect of the invention, a kind of multistage route Unit protection method is provided.
Referring to Fig. 3, a kind of multistage route Unit protection method is present embodiments provided, for of the invention first
The multistage route Unit protection system that aspect provides, the described method comprises the following steps:
Step S1, the described protected host obtains Fisrt fault discriminating direction result according to main bus-bar；
Step S2, the described protected host receives the second fault direction and differentiates as a result, second fault direction differentiates result
It is that the protection slave is obtained according to described from bus is synchronous；
Step S3, the described protected host differentiates according to the Fisrt fault discriminating direction result and second fault direction
As a result judge whether the multistage route breaks down；
If the multistage line failure, executes S4；
Step S4, the described protected host issues the main circuit breaker and the trip signal from breaker.
The present invention can be expanded using the time-delay characteristics and network of the fast and stable of the point-to-point communication of Ethernet passive optical network
Malleability, an optical line terminal can be by being communicated between passive optical splitters and multiple optical network units, and the present invention can spirit
Extension multi-point circuit Unit protection slave number living, realizes the Unit protection of multiterminal transmission line of electricity；And SMV,
On the basis of the fast and reliable transmission of GOOSE message, moreover it is possible to transmit MMS message, the distal end configuration of realization device and information are called.
Further, in the multistage route Unit protection method, the protected host 4 receives the second fault direction
Differentiate as a result, specifically: between the optical line terminal 11 and the optical network unit 12 pass through proprietary protocol exchange trouble side
SMV, GOOSE message and MMS message are exchanged to differentiation result information, or by 61850 agreement of IEC.Route protection host and from
With 61850 agreement of IEC exchange SMV, GOOSE message and MMS message between machine, realize that line fault direction is sentenced with above-mentioned message
Other result transmitting realizes that the configuration of a route protection distant place and information are called.
Further, in the multistage route Unit protection method, the optical line terminal 11 and the optical-fiber network
SMV, GOOSE message and MMS message are exchanged by 61850 agreement of IEC between unit 12, specifically: it is the SMV, described
GOOSE message and the MMS message bandwidth allocation are using the method for fixing polling cycle and Dynamic Bandwidth Allocation.Using fast pulley
It is quick for communicating that the method for inquiry period and Dynamic Bandwidth Allocation solves SMV, GOOSE and MMS message in IEC61850 agreement
Property, the coordination problem of reliability；Ensure that 4000 points per second of SMV transmit at equal intervals, whether GOOSE message switching value conjugates with dynamic
It is spaced reliable transmission, while ensuring the efficiency of transmission of MMS message.
Further, in the multistage route Unit protection method, the SMV, GOOSE message and MMS message band
The method that width distribution uses fixed polling cycle and Dynamic Bandwidth Allocation, specifically:
A kind of new REPORT is arranged to upload and/or GATE issuing mechanism, upstream bandwidth is divided into the SMV, described
Three priority, the SMV highest priority are arranged in GOOSE message, the MMS message three classes, and the GOOSE message is taken second place,
The MMS message is minimum.
Referring to Fig. 4, optical line terminal issues GATE twice to each optical network unit and awards in each polling cycle
Power, the GATE authorization issued for the first time includes highest priority traffic (SMV) bandwidth authorizing, such as G1, G2, G'1, G'2, second
The GATE authorization issued includes the bandwidth authorizing of middle priority service (GOOSE message) and low priority traffice (MMS message), such as
Gs1, Gs2, Gs'1 and Gs'2.
Optical network unit 1 (ONU1) is in G1 authorized window, upload SMV first, and one is and then uploaded after SMV
REPORT message when optical network unit bandwidth application, is separately applied for that optical line terminal receives ONU1 upload by three priority levels
REPORT message when, the application of SMV bandwidth is allocated immediately first, and issue an authorization G'1 to ONU1；Similarly, light
Network unit 2 (ONU2) does same processing in G2 authorized window；Receive what all optical network units uploaded in optical line terminal
After REPORT message, count in all optical network units, low priority bandwidth application, plan as a whole bandwidth allocation, and will in, it is low excellent
The bandwidth of first grade traffic assignments is issued by Gs'1, Gs'2 authorization and reports to corresponding optical network unit.
This algorithm is according to the REPORT message received in n-th polling cycle, to band in (N+1) a polling cycle
Width is dynamically distributed.It can be seen that dynamic bandwidth allocation algorithm calculating treatmenting time from above-mentioned principles illustrated, and be not take up band
Any idle bandwidth waste is not present in wide resource in the entire Dynamic Bandwidth Allocation period.
This algorithm uses three sub-distribution of bandwidth issuing mechanism twice: optical line terminal is preferential by tri- kinds of SMV, GOOSE and MMS
Grade is sequentially completed the bandwidth allocation to three types business；High priority SMV service bandwidth individually uses a GATE entitlement message
It issues；In, low priority GOOSE, MMS service bandwidth, cause to occupy excessive downlink in order to avoid frequently issuing GATE message excessively
Bandwidth resources, GOOSE, MMS service bandwidth are merged into a GATE authorization and are issued.
Each dynamic bandwidth polling cycle is artificially divided into two sections: SMV upload part Tup and GOOSE, MMS by this algorithm
Part Tdown is uploaded, Tdba=Tup+Tdown, it is schematically illustrate such as Fig. 1 institute that when initialization sets Tup=TN/2, Tup and Tdown
Show.Within the Tup period, when optical line terminal receives the REPORT message of optical network unit upload, immediately in REPORT
Highest priority traffic (SMV) bandwidth application of application is authorized, and issues an authorization GATE to optical network unit, and more
Tup value in new polling cycle once；At the end of Tup window, optical line terminal starts to count all optical network units uploads
GOOSE, MMS bandwidth application, first successively to middle priority service (GOOSE message) bandwidth of all optical network unit applications
Application carries out bandwidth allocation, then again successively to low priority traffice (MMS message) bandwidth of the application of all optical network units
Application carries out bandwidth allocation, and finally GOOSE, MMS bandwidth authorizing are merged into an authorization GATE and are handed down to corresponding light
Network unit.
Wherein, Tup is that SMV uploads part；Tdown is GOOSE, and MMS uploads part；SV1, SV2 are respectively ONU1, ONU2
SMV in n-th BDA polling cycle；R1, R2 are respectively the REPORT report of ONU1, ONU2 in n-th BDA polling cycle
Text；G1, G2 are respectively that OLT is handed down to ONU1, ONU2 in the N+1 BDA polling cycle in n-th BDA polling cycle
The authorized window for being used for transmission SV1, SV2；GOOSE1, MMS1, GOOSE2, MMS2 are respectively ONU1, ONU2 in n-th BDA
GOOSE message and MMS message in polling cycle；Gs1, Gs2 are respectively that OLT is handed down in n-th BDA polling cycle
ONU1, ONU2 are for the authorized window for being used for transmission GOOSE1, MMS1, GOOSE2, MMS2 in the N+1 BDA polling cycle.
Using two kinds of bandwidth authorizings, three kinds of different bandwidth priority distribution；Wherein first bandwidth authorizing is used for IEC
61850 SMV transmission, GOOSE message and MMS message transmission of second bandwidth authorizing for 61850 agreement of IEC, the two punching
Preferential bandwidth allocation is to GOOSE message when prominent.Why two kinds of bandwidth authorizings are used, is in order to ensure each polling cycle first
Interior, all optical network units can obtain window authorization, guarantee real-time and reliability that each SMV is uploaded.By GOOSE and MMS
Authorization unification, be to improve communication efficiency to reduce authorization expense, in second authorization, when GOOSE and MMS bandwidth Shen
When please conflict, band preference is distributed into GOOSE message, is the requirement in order to ensure GOOSE message to real-time.
Further, in the multistage route Unit protection method, second fault direction differentiates the result is that institute
It states protection slave 10 and synchronizes acquisition from bus 8 according to described, specifically: use compensation of delay means or ieee standard clock synchronization side
Formula realizes that sample information is synchronous.Event can be made by realizing that sample information synchronizes using compensation of delay means or ieee standard clock synchronization mode
It is more acurrate to hinder discriminating direction result, avoids generating error since the time is inaccurate.
Further, described to use compensation of delay means or IEEE in the multistage route Unit protection method
1588 clock synchronization modes realize that sample information is synchronous, specifically:
The optical line terminal 11 according to internal crystal oscillator, be synchronized with external GPS or big dipper clock, export pulse per second (PPS) or clock synchronization
Message is to the protected host 4；
The sampling pulse of the protected host 4 is synchronized with pulse per second (PPS) or the clock synchronization message of the optical line terminal 11；
The pulse per second (PPS) that the optical network unit 12 passes through compensation of delay means or ieee standard and the optical line terminal 11
It realizes synchronous clock synchronization, and exports pulse per second (PPS) or clock synchronization message；
The sampling pulse of the protection slave 10 is synchronized with pulse per second (PPS) or the clock synchronization message of the optical network unit 12.
The optical line terminal being connected with protected host is according to a local clock or time counter, by a sampling period
When generating a cycle sampling instant sequence, and will include sampling instant, sampling period, trip path time delay or downlink path
The synchronized sampling information prolonged is handed down to and protects the optical network unit of slave, and slave sampling instant is all produced by host optical line terminal
It gives birth to and issues, slave generates periodic samples pulse according to this synchronized sampling information；
From the above technical scheme, a kind of multistage route Unit protection system and method provided by the invention.Institute
Stating multistage route includes: Bulk Supply Substation 1 equipped with main bus-bar 2 and main circuit breaker 3, equipped with from bus 8 and from the several of breaker 9
From substation 7, and it is connected to the Bulk Supply Substation 2 and the transmission line of electricity 5 between substation 7, the system comprises:
Protected host 4, protection slave 10, optical line terminal 11, optical network unit 12 and optical fiber 6；The protected host 4 and the light
Road terminal 11 is set in the Bulk Supply Substation 1；The protection slave 10 and the optical network unit 12 are set to described from substation 7
It is interior；The protected host 4 is connect by the optical line terminal 11 with optical fiber 6；The protection slave 10 passes through the optical-fiber network
Unit 12 is connect with optical fiber 6；The optical fiber 6 is made of a fibre core.The described method includes: the protected host 4 is according to main mother
Line 2 obtains Fisrt fault discriminating direction result；The protected host 4 receives the second fault direction and differentiates as a result, second event
Hinder discriminating direction the result is that the protection slave 10 synchronizes acquisition from bus 8 according to described；The protected host 4 is according to described
Fisrt fault discriminating direction result and second fault direction differentiate that result judges whether the multistage route breaks down.This
Time-delay characteristics and network scalability of the invention using the fast and stable of the point-to-point communication of Ethernet passive optical network, a light
Line terminal can be by being communicated between passive optical splitters and multiple optical network units, and the present invention can flexible expansion multi-point circuit
Road Unit protection slave number realizes the Unit protection of multiterminal transmission line of electricity；And it is quick in SMV, GOOSE message
On the basis of reliable transmission, moreover it is possible to transmit MMS message, the distal end configuration of realization device and information are called.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (6)
1. a kind of multistage route Unit protection system, the multistage route includes: the master equipped with main bus-bar and main circuit breaker
Substation, equipped with from bus and from the several from substation of breaker, and be connected to the Bulk Supply Substation and described from power transformation
Transmission line of electricity between standing, which is characterized in that the system comprises: protected host, protection slave, optical line terminal, optical-fiber network
Unit and optical fiber；
The protected host and the optical line terminal are set in the Bulk Supply Substation；
The protection slave and the optical network unit are set to described out of substation；
The protected host is connect by the optical line terminal with the optical fiber；
The protection slave is connect by the optical network unit with the optical fiber；
The optical fiber is made of a fibre core；
Protected host obtains Fisrt fault discriminating direction result according to main bus-bar；
The protected host receives the second fault direction and differentiates as a result, second fault direction differentiates the result is that protection slave root
Acquisition is synchronized according to from bus；
The protected host differentiates that result judges institute according to the Fisrt fault discriminating direction result and second fault direction
State whether multistage route breaks down；
If the multistage line failure, the protected host issues main circuit breaker and the trip signal from breaker；
The protected host receive the second fault direction differentiate as a result, specifically: the optical line terminal and the optical-fiber network list
By proprietary protocol exchange trouble discriminating direction result information between member, or SMV, GOOSE are exchanged by 61850 agreement of IEC and reported
Text and MMS message；
SMV, GOOSE message and MMS are exchanged by 61850 agreement of IEC between the optical line terminal and the optical network unit
Message, specifically: the SMV, the GOOSE message and the MMS message bandwidth allocation are using fixed polling cycle and dynamic
The method of bandwidth allocation；
The method of the SMV, GOOSE message and MMS message bandwidth allocation using fixed polling cycle and Dynamic Bandwidth Allocation, tool
Body are as follows:
The new REPORT upload of one kind is set and/or GATE issuing mechanism, upstream bandwidth are divided into the SMV, the GOOSE report
Three priority, the SMV highest priority are arranged in literary, the described MMS message three classes, and the GOOSE message is taken second place, the MMS
Message is minimum；
In each polling cycle, optical line terminal issues GATE authorization twice to each optical network unit, issues for the first time
GATE authorization include highest priority traffic SMV bandwidth authorizing issue for the second time GATE authorization include middle priority service
The bandwidth authorizing of GOOSE message and low priority traffice MMS message；
When optical network unit bandwidth application, separately apply by three priority levels, optical line terminal receives optical network unit upload
REPORT message when, the application of SMV bandwidth is allocated immediately first, and issue one authorization to optical network unit in light
After road terminal receives the REPORT message that all optical network units upload, count in all optical network units, low priority band
Width application, plans as a whole bandwidth allocation, and by, the bandwidth of low priority traffice distribution issues and reports to corresponding optical network unit.
2. multistage route Unit protection system according to claim 1, which is characterized in that the optical line terminal and
The optical network unit only transmits commercial data.
3. multistage route Unit protection system according to claim 1, which is characterized in that the optical line terminal and
The optical network unit is made of special chip or field programmable gate array.
4. a kind of multistage route Unit protection method is used for multistage route Unit protection system described in claim 1
System, which is characterized in that the described method comprises the following steps:
Protected host obtains Fisrt fault discriminating direction result according to main bus-bar；
The protected host receives the second fault direction and differentiates as a result, second fault direction differentiates the result is that protection slave root
Acquisition is synchronized according to from bus；
The protected host differentiates that result judges institute according to the Fisrt fault discriminating direction result and second fault direction
State whether multistage route breaks down；
If the multistage line failure, the protected host issues main circuit breaker and the trip signal from breaker；
The protected host receive the second fault direction differentiate as a result, specifically: the optical line terminal and the optical-fiber network list
By proprietary protocol exchange trouble discriminating direction result information between member, or SMV, GOOSE are exchanged by 61850 agreement of IEC and reported
Text and MMS message；
SMV, GOOSE message and MMS are exchanged by 61850 agreement of IEC between the optical line terminal and the optical network unit
Message, specifically: the SMV, the GOOSE message and the MMS message bandwidth allocation are using fixed polling cycle and dynamic
The method of bandwidth allocation；
The method of the SMV, GOOSE message and MMS message bandwidth allocation using fixed polling cycle and Dynamic Bandwidth Allocation, tool
Body are as follows:
The new REPORT upload of one kind is set and/or GATE issuing mechanism, upstream bandwidth are divided into the SMV, the GOOSE report
Three priority, the SMV highest priority are arranged in literary, the described MMS message three classes, and the GOOSE message is taken second place, the MMS
Message is minimum；
In each polling cycle, optical line terminal issues GATE authorization twice to each optical network unit, issues for the first time
GATE authorization include highest priority traffic SMV bandwidth authorizing issue for the second time GATE authorization include middle priority service
The bandwidth authorizing of GOOSE message and low priority traffice MMS message；
When optical network unit bandwidth application, separately apply by three priority levels, optical line terminal receives optical network unit upload
REPORT message when, the application of SMV bandwidth is allocated immediately first, and issue one authorization to optical network unit in light
After road terminal receives the REPORT message that all optical network units upload, count in all optical network units, low priority band
Width application, plans as a whole bandwidth allocation, and by, the bandwidth of low priority traffice distribution issues and reports to corresponding optical network unit.
5. according to the method described in claim 4, it is characterized in that, second fault direction differentiates the result is that protection slave root
Acquisition is synchronized according to from bus, specifically: realize that sample information is synchronous using compensation of delay means or ieee standard clock synchronization mode.
6. according to the method described in claim 5, it is characterized in that, described use compensation of delay means or ieee standard clock synchronization side
Formula realizes that sample information is synchronous, specifically:
The optical line terminal according to internal crystal oscillator, be synchronized with external GPS or big dipper clock, export pulse per second (PPS) or clock synchronization message extremely
The protected host；
The sampling pulse of the protected host is synchronized with pulse per second (PPS) or the clock synchronization message of the optical line terminal；
The optical network unit is realized by the pulse per second (PPS) of compensation of delay means or ieee standard mode and the optical line terminal
Synchronous clock synchronization, and export pulse per second (PPS) or clock synchronization message；
The sampling pulse of the protection slave is synchronized with pulse per second (PPS) or the clock synchronization message of the optical network unit.
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