CN106505534B - Multistage circuit longitudinal distance protection system and method - Google Patents
Multistage circuit longitudinal distance protection system and method Download PDFInfo
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- CN106505534B CN106505534B CN201611024725.XA CN201611024725A CN106505534B CN 106505534 B CN106505534 B CN 106505534B CN 201611024725 A CN201611024725 A CN 201611024725A CN 106505534 B CN106505534 B CN 106505534B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/70—Arrangements in the main station, i.e. central controller
- H04Q2209/75—Arrangements in the main station, i.e. central controller by polling or interrogating the sub-stations
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Abstract
The invention discloses a kind of multistage circuit longitudinal distance protection system and method, the multistage circuit includes：It is Bulk Supply Substation, several from substation, and it 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 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 longitudinal distance protection slave number; realize that the longitudinal distance protection of multiterminal transmission line of electricity, the distal end configuration of realization device and information call.
Description
Technical field
The present invention relates to Relay Protection Technology in Power System field, more particularly to a kind of multistage circuit longitudinal distance protection system
System and method.
Background technology
With the propulsion of Chinese Urbanization development process, urban land resource growing tension, transmit electricity gallery and switchyard choosing
Location is increasingly difficult, occurs more and more T circuits 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 both sides switch while fast trip when line failure,
It is the main protection of circuit.Longitudinal distance protection is using channel transfer block signal or to allow signal, is realized selectively fast
Speed excision all fronts failure.Pilot protection is different according to the effect of channel transmission signal, can be divided into two kinds of enclosed type and permissive type.
When for special enclosed type, the self-test logic in vertical unicom road is realized by protective device, and transceiver stops letter and transmits completely
It is controlled by protective device.For enclosed type, the interference on channel in order to prevent is provided with two-stage delay confirmation in protective device,
First, protective device must just allow to stop letter after the high-frequency signal for receiving offside；Second is that protective device will continuously be received not after stopping letter
High-frequency signal to offside could act outlet.When for permissive type, what protective device must continuously receive offside allows letter
Number it could act outlet.No matter using enclosed type or permissive type, it is positive and negative as judging to be all made of distancing element apart from pilot protection
The criterion in direction.
For traditional double line terminal, main protection usually configures Unit protection or longitudinal distance protection.The vertical connection of tradition
Distance protection generally use carrier channel or optical-fibre channel are as communication port.Since carrier channel anti-interference ability is poor, have
The trend gradually replaced by optical-fibre channel.But it is typically due to optical-fibre channel and uses point-to-point mode, if being used for multi-point circuit,
Scalability is relatively poor.
Invention content
The goal of the invention of the present invention is to provide a kind of multistage circuit longitudinal distance protection system and method, solution multi-section-line
The problem of road longitudinal distance protection autgmentability difference.
According to embodiments of the present invention in a first aspect, providing a kind of multistage circuit longitudinal distance protection system, the multistage
Circuit includes：Bulk Supply Substation equipped with main bus-bar and main circuit breaker, equipped with from busbar and from the several from substation of breaker, with
And it is 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, which is used to obtain the first range direction according to the main bus-bar, differentiates result；Receive second distance side
To differentiation result；Differentiate that result and the second distance discriminating direction result judge the multistage according to first range direction
Whether circuit breaks down；If the multistage line failure, the protected host sends out the main circuit breaker and institute
State the trip signal from breaker；
The protection slave is used to obtain the second distance discriminating direction result according to described synchronize from busbar.
Further, in the multistage circuit longitudinal distance protection system, the optical line terminal and the optical-fiber network
Unit only transmits commercial data.
Further, in the multistage circuit longitudinal distance 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 circuit longitudinal distance protection method, for above-mentioned
Multistage circuit longitudinal distance protection system, the described method comprises the following steps：
The protected host obtains the first range direction according to main bus-bar and differentiates result；
The protected host receives second distance discriminating direction as a result, the second distance discriminating direction is the result is that the guarantor
It protects slave and synchronizes acquisition from busbar according to described；
The protected host differentiates that result and the second distance discriminating direction result are sentenced according to first range direction
Whether the multistage circuit that breaks breaks down；
If the multistage line failure, the protected host sends out the main circuit breaker and described from breaker
Trip signal.
Further, in the multistage circuit longitudinal distance protection method, the protected host receives second distance direction
Differentiate as a result, being specially：Range direction is exchanged between the optical line terminal and the optical network unit by proprietary protocol to sentence
Other result information, or SMV, GOOSE message and MMS messages are exchanged by 61850 agreements of IEC.
Further, in the multistage circuit longitudinal distance protection method, the optical line terminal and the optical-fiber network list
SMV, GOOSE message and MMS messages are exchanged by 61850 agreements of IEC between member, specially：The SMV, the GOOSE are reported
The literary and described MMS message bandwidth allocations are using the method for fixing polling cycle and Dynamic Bandwidth Allocation.
Further, in the multistage circuit longitudinal distance protection method, the SMV, GOOSE message and MMS message bands
Width distribution is using the method for fixing polling cycle and Dynamic Bandwidth Allocation, specially：
A kind of new REPORT is arranged to upload and/or GATE issuing mechanisms, upstream bandwidth is divided into the SMV, described
Three priority, the SMV highest priorities are arranged in GOOSE message, the MMS messages three classes, and the GOOSE message is taken second place,
The MMS messages are minimum.
Further, in the multistage circuit longitudinal distance protection method, the second distance discriminating direction is the result is that institute
It states protection slave and synchronizes acquisition from busbar according to described, specially：Using 1588 clock synchronization mode of compensation of delay means or IEEE
Realize that sample information synchronizes.
Further, described to use compensation of delay means or IEEE in the multistage circuit longitudinal distance protection method
1588 clock synchronization modes realize that sample information synchronizes, specially：
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.
By above technical scheme it is found that a kind of multistage circuit longitudinal distance protection system and method provided by the invention.Institute
Stating multistage circuit includes：Bulk Supply Substation equipped with main bus-bar and main circuit breaker several is equipped with from busbar and from breaker from change
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 method includes：The protected host obtains the first range direction according to main bus-bar and differentiates knot
Fruit；The protected host receive second distance discriminating direction as a result, the second distance discriminating direction the result is that the protection from
Machine synchronizes acquisition according to described from busbar；The protected host differentiates result and described second according to first range direction
Range direction differentiates that result judges whether the multistage circuit breaks down.The present invention utilizes the point pair of Ethernet passive optical network
The time-delay characteristics and network scalability of the fast and stable of point communication, optical line terminal can be by passive optical splitters and more
Communicated between a optical network unit, the present invention can flexible expansion multi-point circuit longitudinal distance protection slave number, realize it is more
Hold the longitudinal distance protection of transmission line of electricity；And on the basis of the fast and reliable transmission of SMV, GOOSE message, moreover it is possible to transmit MMS
Message, the distal end configuration of realization device and information are called.
Description of the drawings
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 present 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 circuit longitudinal distance protection system structure diagram exemplified according to implementation；
Fig. 2 is another multistage circuit longitudinal distance protection system structure diagram exemplified according to implementation；
Fig. 3 is a kind of multistage circuit longitudinal distance protection method flow diagram exemplified according to implementation；
Fig. 4 is the schematic diagram according to the fixation polling cycle and dynamic bandwidth allocation mechanism for implementing to exemplify.
It illustrates：
Wherein, 1- Bulk Supply Substations, 2- main bus-bars, 3- main circuit breakers, 4- protected hosts, 5- transmission lines of electricity, 6- optical fiber, 7- from
Substation, 8- protect slave, 11- optical line terminals, 12- optical network units from busbar, 9- from breaker, 10-.
Specific implementation mode
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 circuit longitudinal distance protection system is provided.
Embodiment one
Referring to Fig. 1, present embodiments providing a kind of multistage circuit longitudinal distance protection system, the multistage circuit packet
It includes：Bulk Supply Substation 1 equipped with main bus-bar 2 and main circuit breaker 3, equipped with from busbar 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, 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, which is used to obtain the first range direction according to the main bus-bar 2, differentiates result；Receive second distance
Discriminating direction result；It is described more to differentiate that result and the second distance discriminating direction result judge according to first range direction
Whether section circuit breaks down；If the multistage line failure, the protected host 4 send out the main circuit breaker 3
And the trip signal from breaker 9；
The protection slave 10 is used to obtain the second distance discriminating direction result according to described synchronize from busbar 8.
A kind of course of work of multistage circuit longitudinal distance protection system of the present invention is：Protection slave 10 is obtained by synchronizing
It takes from the second distance discriminating direction of busbar 8 as a result, and it is sent to protected host 4 by passive optical network in real time.Protection master
Machine 4 differentiates result and the second distance discriminating direction that light protection slave 10 transmits according to the first range direction that main bus-bar 2 acquires
As a result to judge whether the multistage circuit 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 longitudinal distance protection slave number living, realizes the longitudinal distance 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 messages, the distal end configuration of realization device and information are called.
Further, in the multistage circuit longitudinal distance 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 transmitting of the high-precise synchronization and message between optical line terminal 11 and optical network unit 12 are realized.
Further, in the multistage circuit longitudinal distance 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 transmitting of existing high-precise synchronization and message between optical line terminal 11 and optical network unit 12.
Embodiment two
Referring to Fig. 2, another multistage circuit longitudinal distance 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 circuit longitudinal distance protection system that the other structures of distance protection system are provided with reference to embodiment one, it is no longer superfluous herein
It states.
By above technical scheme it is found that a kind of multistage circuit longitudinal distance protection system provided by the invention.The multistage
Circuit includes：Bulk Supply Substation 1 equipped with main bus-bar 2 and main circuit breaker 3, equipped with from busbar 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 with optical fiber 6 by the optical line terminal 11；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 longitudinal distance protection slave number, realize multiterminal power transmission line
The longitudinal distance protection on road；And on the basis of the fast and reliable transmission of SMV, GOOSE message, moreover it is possible to transmit MMS messages, realize
The distal end configuration of device and information are called.
According to the second aspect of the invention, a kind of multistage circuit longitudinal distance protection method is provided.
Referring to Fig. 3, a kind of multistage circuit longitudinal distance protection method is present embodiments provided, first for the present invention
The multistage circuit longitudinal distance protection system that aspect provides, the described method comprises the following steps：
Step S1, the described protected host obtains the first range direction according to main bus-bar and differentiates result；
Step S2, the described protected host receives second distance discriminating direction as a result, the second distance discriminating direction result
It is that the protection slave is obtained according to described synchronized from busbar；
Step S3, the described protected host differentiates result and the second distance discriminating direction according to first range direction
As a result judge whether the multistage circuit breaks down；
If the multistage line failure, executes S4；
Step S4, the described protected host sends out 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 longitudinal distance protection slave number living, realizes the longitudinal distance 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 messages, the distal end configuration of realization device and information are called.
Further, in the multistage circuit longitudinal distance protection method, the protected host 4 receives second distance direction
Differentiate as a result, being specially：Distance side is exchanged by proprietary protocol between the optical line terminal 11 and the optical network unit 12
To differentiation result information, or passes through 61850 agreements of IEC and exchange SMV, GOOSE message and MMS messages.Route protection host and from
SMV, GOOSE message and MMS messages are exchanged with 61850 agreements of IEC between machine, realize that circuit range direction is sentenced with above-mentioned message
Other result is transmitted, and realizes that the configuration of a route protection distant place and information are called.
Further, in the multistage circuit longitudinal distance protection method, the optical line terminal 11 and the optical-fiber network
SMV, GOOSE message and MMS messages are exchanged by 61850 agreements of IEC between unit 12, specially：It is the SMV, described
GOOSE message and the MMS messages 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 agreements
Property, the coordination problem of reliability；Ensure that 4000 points per second of SMV is transmitted at equal intervals, whether GOOSE message switching value conjugates with dynamic
It is spaced transmitting, while ensuring the efficiency of transmission of MMS messages.
Further, in the multistage circuit longitudinal distance protection method, the SMV, GOOSE message and MMS message bands
Width distribution is using the method for fixing polling cycle and Dynamic Bandwidth Allocation, specially：
A kind of new REPORT is arranged to upload and/or GATE issuing mechanisms, upstream bandwidth is divided into the SMV, described
Three priority, the SMV highest priorities are arranged in GOOSE message, the MMS messages three classes, and the GOOSE message is taken second place,
The MMS messages are minimum.
Referring to Fig. 4, in each polling cycle, optical line terminal issues GATE twice to each optical network unit and awards
Power, the GATE mandates issued for the first time include highest priority traffic (SMV) bandwidth authorizing, such as G1, G2, G'1, G'2, for the second time
The GATE mandates issued include the bandwidth authorizing of middle priority service (GOOSE message) and low priority traffice (MMS messages), such as
Gs1, Gs2, Gs'1 and Gs'2.
Optical network unit 1 (ONU1) uploads SMV, and one is and then uploaded after SMV first in G1 authorized windows
REPORT messages when optical network unit bandwidth application, are separately applied for that optical line terminal receives ONU1 uploads by three priority levels
REPORT messages when, the application of SMV bandwidth is allocated immediately first, and issue one mandate G'1 to ONU1；Similarly, light
Network element 2 (ONU2) does same processing in G2 authorized windows；Receive what all optical network units uploaded in optical line terminal
After REPORT messages, 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 mandate and reports to corresponding optical network unit.
This algorithm is according to the REPORT messages received in n-th polling cycle, to band in (N+1) a polling cycle
Width is dynamically distributed.Dynamic bandwidth allocation algorithm calculating treatmenting time is can be seen that from above-mentioned principles illustrated, and is 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 bandwidths are individually with 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 messages excessively
Bandwidth resources, GOOSE, MMS service bandwidth are merged into during a GATE is authorized and are issued.
Each dynamic bandwidth polling cycle is artificially divided into two sections by this algorithm：SMV uploads part Tup and GOOSE, MMS
Part Tdown is uploaded, Tdba=Tup+Tdown, it is schematically illustrate such as Fig. 1 institutes that when initialization sets Tup=TN/2, Tup and Tdown
Show.Within the Tup periods, when optical line terminal receives the REPORT messages of optical network unit upload, immediately in REPORT
Highest priority traffic (SMV) bandwidth application of application is authorized, and is issued one and authorized GATE to optical network unit, and more
Tup values in new polling cycle once；At the end of Tup windows, 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 messages) bandwidth of the application of all optical network units
Application carries out bandwidth allocation, and finally GOOSE, MMS bandwidth authorizing are merged into a mandate GATE and are handed down to corresponding light
Network element.
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 cycles；R1, R2 are respectively the REPORT reports of ONU1, ONU2 in n-th BDA polling cycles
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 cycles
The authorized window for being used for transmission SV1, SV2；GOOSE1, MMS1, GOOSE2, MMS2 are respectively ONU1, ONU2 in n-th BDA
GOOSE message in polling cycle and MMS messages；Gs1, Gs2 are respectively that OLT is handed down in n-th BDA polling cycles
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 agreements 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 mandate, ensure real-time and reliability that each SMV is uploaded.By GOOSE and MMS
Mandate unification, be to improve communication efficiency to reduce mandate expense, authorized at second in, 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 circuit longitudinal distance protection method, the second distance discriminating direction is the result is that institute
It states protection slave 10 and synchronizes acquisition from busbar 8 according to described, specially：Using compensation of delay means or ieee standard clock synchronization side
Formula realizes that sample information synchronizes.Using compensation of delay means or ieee standard clock synchronization mode realize sample information synchronize can make away from
It is more acurrate from discriminating direction result, it avoids generating error since the time is inaccurate.
Further, described to use compensation of delay means or IEEE in the multistage circuit longitudinal distance protection method
1588 clock synchronization modes realize that sample information synchronizes, specially：
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, slave sampling instant all to be produced by host optical line terminal
It gives birth to and issues, slave generates periodic samples pulse according to this synchronized sampling information；
By above technical scheme it is found that a kind of multistage circuit longitudinal distance protection system and method provided by the invention, institute
Stating multistage circuit includes：Bulk Supply Substation 1 equipped with main bus-bar 2 and main circuit breaker 3 several is equipped with from busbar 8 and from 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 method includes：The protected host 4 is according to main mother
Line 2 obtains the first range direction and differentiates result；The protected host 4 receive second distance discriminating direction as a result, described second away from
From discriminating direction the result is that the protection slave 10 synchronizes acquisition according to described from busbar 8；The protected host 4 is according to described
First range direction differentiates that result and the second distance discriminating direction result judge whether the multistage circuit breaks down.This
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, 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 longitudinal distance protection slave number realizes the longitudinal distance protection of multiterminal transmission line of electricity；And it is quick in SMV, GOOSE message
On the basis of transmitting, moreover it is possible to transmit MMS messages, 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 its of the present invention
Its embodiment.This application is intended to cover the present invention any variations, uses, or adaptations, these modifications, purposes or
Person's adaptive change follows the general principle of the present invention and includes undocumented common knowledge in the art of the 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 invention is not limited in the precision architectures for being described above and being 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 (9)
1. a kind of multistage circuit longitudinal distance protection system, the multistage circuit include：Master equipped with main bus-bar and main circuit breaker
Substation, equipped with from busbar and from the several from substation of breaker, and be connected to the Bulk Supply Substation with it is 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；
The protected host, which is used to obtain the first range direction according to the main bus-bar, differentiates result；Second distance direction is received to sentence
Other result；Differentiate that result and the second distance discriminating direction result judge the multistage circuit according to first range direction
Whether break down；If the multistage line failure, the protected host send out the main circuit breaker and it is described from
The trip signal of breaker；
The protection slave is used to obtain the second distance discriminating direction result according to described synchronize from busbar.
2. multistage circuit longitudinal distance 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 circuit longitudinal distance 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 circuit longitudinal distance protection method is used for multistage circuit longitudinal distance protection system described in claim 1
System, which is characterized in that the described method comprises the following steps：
Protected host obtains the first range direction according to main bus-bar and differentiates result；
The protected host receives second distance discriminating direction as a result, the second distance discriminating direction is the result is that protection slave root
It is obtained according to described synchronized from busbar；
The protected host differentiates that result and the second distance discriminating direction result judge institute according to first range direction
State whether multistage circuit breaks down；
If the multistage line failure, the protected host sends out main circuit breaker and the trip signal from breaker.
5. according to the method described in claim 4, it is characterized in that, the protected host receives second distance discriminating direction knot
Fruit, specially：Range direction is exchanged by proprietary protocol between the optical line terminal and the optical network unit and differentiates result
Information, or SMV, GOOSE message and MMS messages are exchanged by 61850 agreements of IEC.
6. according to the method described in claim 5, it is characterized in that, leading between the optical line terminal and the optical network unit
It crosses 61850 agreements of IEC and exchanges SMV, GOOSE message and MMS messages, specially：The SMV, the GOOSE message and described
MMS message bandwidth allocations are using the method for fixing polling cycle and Dynamic Bandwidth Allocation.
7. according to the method described in claim 6, it is characterized in that, the SMV, GOOSE message and MMS message bandwidth allocations are adopted
With the method for fixed polling cycle and Dynamic Bandwidth Allocation, specially：
It is arranged that a kind of new REPORT is uploaded and/or GATE issuing mechanisms, upstream bandwidth are divided into the SMV, the GOOSE report
Three priority, the SMV highest priorities are arranged in literary, the described MMS message three classes, and the GOOSE message is taken second place, the MMS
Message is minimum.
8. according to the method described in claim 4, it is characterized in that, the second distance discriminating direction the result is that it is described protection from
Machine is obtained according to described synchronized from busbar, specially：Sampling letter is realized using compensation of delay means or ieee standard clock synchronization mode
Breath synchronizes.
9. according to the method described in claim 8, it is characterized in that, described use compensation of delay means or ieee standard clock synchronization side
Formula realizes that sample information synchronizes, specially：
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 synchronous by the pulse per second (PPS) realization of compensation of delay means or ieee standard and the optical line terminal
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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| CN116527138A (en) * | 2023-07-04 | 2023-08-01 | 常州镭斯尔通讯技术有限公司 | Optical communication method |
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| WO2011060578A1 (en) * | 2009-11-18 | 2011-05-26 | Abb Research Ltd. | Method and apparatus for ground distance protection |
| CN101764396A (en) * | 2009-12-30 | 2010-06-30 | 深圳南瑞科技有限公司 | Method for realizing longitudinal distance protection at adaptive weak power side |
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