CN106602525B - Power distribution network differential protective system and method - Google Patents
Power distribution network differential protective system and method Download PDFInfo
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- CN106602525B CN106602525B CN201611024117.9A CN201611024117A CN106602525B CN 106602525 B CN106602525 B CN 106602525B CN 201611024117 A CN201611024117 A CN 201611024117A CN 106602525 B CN106602525 B CN 106602525B
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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
- H02H7/262—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 involving transmissions of switching or blocking orders
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Abstract
The invention discloses a kind of power distribution network differential protective system and method, which includes: differential protection host, collecting terminal, optical line terminal and optical network unit；The flexible expansion of differential protection can be achieved, adapt to distribution network systems flexible and changeable wiring and the method for operation, adapt to the flexible access of distributed energy, it is ensured that the selectivity of distribution network protection, rapidity, reliability and sensitivity realize the quick positioning and excision of failure；Simultaneously; using passive optical network; the flexible access of multiple terminals can be realized with a trunk optical fiber fibre core and several branch's fibre cores; fiber resource can largely be saved; and on the basis of guaranteeing net synchronization capability and the fast and reliable transmission of SMV, GOOSE message; MMS message can also be transmitted, realizes that the distal end configuration of collecting terminal and information are called, realizes the differential protection to the power distribution network of power network.
Description
Technical field
The present invention relates to Relay Protection Technology in Power System field, in particular to a kind of power distribution network differential protective system and side
Method.
Background technique
Conventional electrical distribution net does not consider that distributed energy accesses, and fault current exists only between power supply and fault point, usually
It is only that configuration is simple in the advantages of overcurrent protection of substation's 10kV line outlet configuration with direction, the program, the disadvantage is that selection
Property it is poor, even if installing overcurrent protective device for branched line, but since distribution line electrical distance is short, the exit 10kV and branch
Route overcurrent protection definite value size cannot be distinguished, and can only ensure to select by allowing the overcurrent protection deferred action of the exit 10kV
Property.On the other hand, it when backbone breaks down, is protected if do not installed in backbone section switch, will lead to and completely lose
Electricity；If section switch installs overcurrent protection, the selectivity of overcurrent protection still can only be ensured by being delayed, is segmented more
When, it is very slow to will lead to protection act speed at substation exit.
In order to meet the rapidity of failure removal and the accuracy of fault location, when the way of former mainstream is failure hair
When raw, failure is quickly cut off by substation exit breaker, then according to segment failure indicator positioning failure, i.e., before fault point
Fault detector fault-signal is provided by fault current triggering, fault-signal is then obtained by patrolman or networking, it is final really
Determine fault point.Fault point opposite can be accurately positioned using the program, but non-faulting section can also be caused to have a power failure, power off time is from rather
Clock is to dozens of minutes etc..
With the gradually popularization of distributed new, distribution network systems gradually develop into power network, failure by radial
When generation, not only there is the electric current for flowing to fault point from system side, also has the electric current from distributed generation resource effluent to fault point, this makes
It obtains in existing technology and determines that the method for fault point is no longer desirable for the power distribution network of power network according to fault detector.
Summary of the invention
Goal of the invention of the invention is to provide a kind of power distribution network differential protective system and method, to solve existing technology
The problem of middle method that fault point is determined according to fault detector is no longer desirable for the power distribution network of power network.
According to embodiments of the present invention in a first aspect, provide a kind of power distribution network differential protective system, main bus-bar, from bus with
And it is connected to the main bus-bar and the distribution line between bus, the main bus-bar is equipped with main circuit breaker, described from mother
Line is equipped with from breaker, and the system comprises: differential protection host, several collecting terminals, optical line terminals and several
Optical network unit；
The differential protection host is connect with the main bus-bar；
Several collecting terminals are connect with described from bus；
The optical line terminal is connect with the differential protection host；
Several optical network units are connect with several collecting terminals respectively；
The optical line terminal is connected with a trunk optical fiber fibre core, the trunk optical fiber fibre core and several passive optical splitters
Connection, several optical network units are connect with several passive optical splitters respectively；
The differential protection host is used to acquire the first electrical quantity according to the main bus-bar；It receives described from the second of bus
Electrical quantity；Difference current is calculated according to first electrical quantity and second electrical quantity；Sentenced according to the difference current
Whether the distribution line that breaks breaks down；If the distribution line breaks down, the differential protection host issues institute
State main circuit breaker and the trip signal from breaker；
The collecting terminal be used for according to described in from bus synchronous acquisition described in the second electrical quantity.
The optical line terminal and the optical network unit only transmit commercial data.
The optical line terminal and the optical network unit special chip or FPGA are realized, are independently transported as isolated system
Row.
Second aspect according to embodiments of the present invention provides a kind of power distribution network differential protecting method, poor for above-mentioned power distribution network
Dynamic protection system, described method includes following steps:
The differential protection host acquires the first electrical quantity according to main bus-bar；
The differential protection host receives the second electrical quantity, and second electrical quantity is the collecting terminal according to institute
It states and is obtained from bus synchronous acquisition；
Difference current is calculated according to first electrical quantity and second electrical quantity in the differential protection host；Root
Judge whether the distribution line breaks down according to the difference current；If the distribution line breaks down, the difference
Dynamic protected host issues the main circuit breaker and the trip signal from breaker.
The differential protection host receives the second electrical quantity, specifically: the optical line terminal and the optical network unit
Between electric quantity information exchanged by proprietary protocol, or SMV, GOOSE message and MMS message are exchanged by 61850 agreement of IEC.
SMV, GOOSE message are exchanged by 61850 agreement of IEC between the optical line terminal and the optical network unit
With MMS message, specifically: the SMV, the GOOSE message and the MMS message bandwidth allocation using fixed polling cycle and
The method of Dynamic Bandwidth Allocation.
The SMV, GOOSE message and MMS message bandwidth allocation are using the side for fixing polling cycle and Dynamic Bandwidth Allocation
Method, 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.
The collecting terminal according to described from bus synchronous acquisition, specifically: use compensation of delay means or IEEE
Standard clock synchronization mode realizes that sample information is synchronous.
It is described to realize that sample information is synchronous using compensation of delay means or ieee standard clock synchronization mode, 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 differential protection host；
The sampling pulse of the differential protection 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 and the optical line terminal
Synchronous clock synchronization, and export pulse per second (PPS) or clock synchronization message；
The sampling pulse of the collecting terminal is synchronized with pulse per second (PPS) or the clock synchronization message of the optical network unit.
From the above technical scheme, power distribution network differential protective system of the invention and method, the power distribution network include: master
Bus from bus and is connected to the main bus-bar and the distribution line between bus, and the main bus-bar is equipped with main disconnected
Road device, it is described to be equipped with from bus from breaker, main bus-bar, from bus and be connected to main bus-bar and between bus with cable
Road, main bus-bar are equipped with main circuit breaker, are equipped with from bus from breaker, and system includes: differential protection host, several intelligent acquisitions end
End, optical line terminal and several optical network units；Differential protection host is connect with main bus-bar；Several collecting terminals with from
Bus connection；Optical line terminal is connect with differential protection host；Several optical network units connect with several collecting terminals respectively
It connects；Optical line terminal is connected with a trunk optical fiber fibre core, and trunk optical fiber fibre core is connect with several passive optical splitters, several light nets
Network unit is connect with several passive optical splitters respectively；Differential protection host is used to acquire the first electrical quantity according to main bus-bar；It receives
From the second electrical quantity of bus；Difference current is calculated according to the first electrical quantity and the second electrical quantity；Sentenced according to difference current
Whether disconnected distribution line breaks down；If distribution line breaks down, differential protection host issues main circuit breaker and from disconnected
The trip signal of road device；Collecting terminal is used for basis from the second electrical quantity of bus synchronous acquisition；Differential protection can be achieved
Flexible expansion adapts to distribution network systems flexible and changeable wiring and the method for operation, adapts to the flexible access of distributed energy, it is ensured that match
Selectivity, the rapidity, reliability and sensitivity for netting protection realize the quick positioning and excision of failure；Meanwhile using passive light
Network can realize the flexible access of multiple terminals with a trunk optical fiber fibre core and several branch's fibre cores, can largely save optical fiber
Resource, and on the basis of guaranteeing net synchronization capability and 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 collecting terminal and information are called, and realize the differential protection to the power distribution network of power network.
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 the schematic diagram that a kind of power distribution network differential protective system exemplified is preferably implemented according to one；
Fig. 2 is the flow chart that a kind of power distribution network differential protecting method exemplified is preferably implemented according to one；
Fig. 3 is improved fixed polling cycle dynamic bandwidth allocation algorithm schematic illustration.
It illustrates:
Wherein, 1- differential protection host, 2- collecting terminal, 3- trunk optical fiber fibre core, 10- main bus-bar, the main open circuit of 11-
Device, 20- is from bus, and 21- is from breaker, 201- optical line terminal, 202- optical network unit, 30- distribution line.
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.
Referring to Fig. 1, according to the present invention example in a first aspect, provide a kind of power distribution network differential protective system, it is described to match
Power grid includes: main bus-bar 10, from bus 20 and is connected to the main bus-bar 10 and the distribution line between bus 20
30, the main bus-bar 10 is equipped with main circuit breaker 11, described to be equipped with from bus 20 from breaker 21, the system comprises: differential guarantor
Protect host 1, several collecting terminals 2, optical line terminal (English: Optical Line Terminal, abbreviation: OLT) 201
And several optical network units (English: Optical Network Unit, abbreviation: ONU) 202；
The differential protection host 1 is connect with the main bus-bar 10；
Several collecting terminals 2 are connect with described from bus 20；
The optical line terminal 201 is connect with the differential protection host 1；
Several optical network units 202 are connect with several collecting terminals 2 respectively；
The optical line terminal 201 is connected with a trunk optical fiber fibre core 3, the trunk optical fiber fibre core 3 with it is several passive
Optical splitter connection, several optical network units 202 are connect with several passive optical splitters respectively；
The differential protection host 1 is used to acquire the first electrical quantity according to the main bus-bar 10；It receives described from bus 20
The second electrical quantity；Difference current is calculated according to first electrical quantity and second electrical quantity；According to described differential
Electric current judges whether the distribution line 30 breaks down；If the distribution line 30 breaks down, the differential protection
Host 1 issues the main circuit breaker 11 and the trip signal from breaker 21；
The collecting terminal 2 be used for according to described in from 20 synchronous acquisition of bus described in the second electrical quantity.
The optical line terminal 201 and the optical network unit 202 only transmit commercial data.
The optical line terminal 201 and the special chip of the optical network unit 202 or FPGA are realized, as isolated system
Independent operating.
Referring to Fig. 2, the second aspect of example according to the present invention, provides a kind of power distribution network differential protecting method, for
Power distribution network differential protective system is stated, described method includes following steps:
Step S1, the described differential protection host acquires the first electrical quantity according to main bus-bar；
Step S2, the described differential protection host receives the second electrical quantity from bus, and second electrical quantity is the intelligence
Energy acquisition terminal is obtained according to described from bus synchronous acquisition；
Step S3, the described differential protection host is calculated differential according to first electrical quantity and second electrical quantity
Electric current；
Step S4, judge whether the distribution line breaks down according to the difference current；
If step S5, the described distribution line breaks down, the optical line terminal issues the main circuit breaker and institute
State the trip signal from breaker.
The differential protection host 1 receives the second electrical quantity, specifically: the optical line terminal 201 and the optical-fiber network
Between unit 202 by proprietary protocol exchange electric quantity information, or by 61850 agreement of IEC exchange SMV, GOOSE message and
MMS message.
Between the optical line terminal 201 and the optical network unit 202 by 61850 agreement of IEC exchange SMV,
GOOSE message and MMS message, specifically: the SMV, the GOOSE message and the MMS message bandwidth allocation are using fixation
The method of polling cycle and Dynamic Bandwidth Allocation.
The SMV, GOOSE message and MMS message bandwidth allocation are using the side for fixing polling cycle and Dynamic Bandwidth Allocation
Method, 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.
The collecting terminal 2 according to described from 20 synchronous acquisition of bus, specifically: using compensation of delay means or
Ieee standard clock synchronization mode realizes that sample information is synchronous.
It is described to realize that sample information is synchronous using compensation of delay means or ieee standard clock synchronization mode, specifically:
The optical line terminal 201 according to internal crystal oscillator, be synchronized with external GPS or big dipper clock, export pulse per second (PPS) or right
When message to the differential protection host 1；
The sampling pulse of the differential protection host 1 is synchronized with pulse per second (PPS) or the clock synchronization message of the optical line terminal 201；
The optical network unit 202 passes through compensation of delay means or the second arteries and veins of ieee standard and the optical line terminal 201
Synchronous clock synchronization is realized in punching, and exports pulse per second (PPS) or clock synchronization message；
The sampling pulse of the collecting terminal 2 is synchronized with pulse per second (PPS) or the clock synchronization message of the optical network unit 202.
The real-time key point of the present invention is to realize two sides sample-synchronous, high-speed data communication with EPON.Realize that each side is synchronous
The specific embodiment of sampling is as follows: the optical line terminal 201 being connected with differential protection host 1 according to a local clock or when
Between counter, generate a cycle sampling instant sequence by sampling period, and will comprising sampling instant, the sampling period,
The synchronized sampling information of trip path time delay or downlink path time delay is handed down to the optical network unit 202 with collecting terminal 2,
2 sampling instant of collecting terminal is all generated and is issued, collecting terminal 2 by the optical line terminal 201 of differential protection host 1
Periodic samples pulse is generated according to this synchronized sampling information；It realizes that the specific embodiment of high-speed data communication is as follows: passing through
The method combined using fixed polling cycle and Dynamic Bandwidth Allocation, solves SMV, GOOSE and MMS in IEC61850 agreement
Message is for communicating rapidity, the coordination problem of reliability；Ensure that 4000 points per second of SMV transmit at equal intervals, GOOSE message switch
Whether amount conjugates with dynamic interval reliable transmission, while ensuring the efficiency of transmission of MMS message.
As shown in figure 3, OLT issues GATE authorization twice to each ONU in each polling cycle, issue for the first time
GATE authorization include highest priority traffic (SMV, such as SV1, SV2) bandwidth authorizing, such as G1, G2, G'1, G'2, under second
The GATE authorization of hair includes middle priority service (GOOSE message, such as GOOSE1, GOOSE2) and low priority traffice (MMS report
Text, such as MMS1, MMS2) bandwidth authorizing, such as Gs1, Gs2, Gs'1, Gs'2.ONU1 is in G1 authorized window, upload SMV first,
And a REPORT message (such as R1, R2) is and then uploaded after SMV, when ONU bandwidth application, separated by three priority levels
Application is first allocated the application of SMV bandwidth, and issue an authorization G' immediately when OLT receives the REPORT of ONU1 upload
1 to ONU1；Similarly, ONU2 does same processing in G2 authorized window；After the REPORT that OLT receives that all ONU are uploaded, statistics
In all ONU, low priority bandwidth application, plan as a whole bandwidth allocation, and by, low priority traffice distribution bandwidth pass through
Gs'1, Gs'2 authorization, which issue, reports to corresponding ONU.
This algorithm is according to the REPORT message received in n-th polling cycle, (such as to (N+1) a polling cycle
T1) interior bandwidth is dynamically distributed.It can be seen that dynamic bandwidth allocation algorithm calculating treatmenting time from above-mentioned principles illustrated, and
Bandwidth resources are not take up, any idle bandwidth waste is not present in the entire Dynamic Bandwidth Allocation period.This algorithm uses bandwidth
Three sub-distribution issuing mechanism twice: OLT is sequentially completed the bandwidth to three types business by tri- kinds of priority of SMV, GOOSE, MMS
Distribution；High priority SMV service bandwidth is individually issued with a GATE entitlement message；In, low priority GOOSE, MMS business band
Width causes to occupy excessive downlink bandwidth resource in order to avoid frequently issuing GATE message excessively, and GOOSE, MMS service bandwidth are merged into
It is issued in one GATE authorization.
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. 3 institute that when initialization sets Tup=TN/2, Tup and Tdown
Show.It is preferential to the highest applied in REPORT immediately when OLT receives the REPORT message of ONU upload within the Tup period
Grade business (SMV) bandwidth application is authorized, and issues an authorization GATE to ONU, and update the Tup in polling cycle
Value；At the end of Tup window, OLT starts to count GOOSE, MMS bandwidth application that all ONU are uploaded, first successively to all
Middle priority service (GOOSE) the bandwidth application of ONU application carries out bandwidth allocation, then again successively to the application of all ONU
Low priority traffice (MMS) bandwidth application carries out bandwidth allocation, and GOOSE, MMS bandwidth authorizing are finally merged into an authorization
In GATE and it is handed down to corresponding ONU.
From the above technical scheme, power distribution network differential protective system of the invention and method, the power distribution network include: master
Bus from bus and is connected to the main bus-bar and the distribution line between bus, and the main bus-bar is equipped with main disconnected
Road device, it is described to be equipped with from bus from breaker, main bus-bar, from bus and be connected to main bus-bar and between bus with cable
Road, main bus-bar are equipped with main circuit breaker, are equipped with from bus from breaker, and system includes: differential protection host, several intelligent acquisitions end
End, optical line terminal and several optical network units；Differential protection host is connect with main bus-bar；Several collecting terminals with from
Bus connection；Optical line terminal is connect with differential protection host；Several optical network units connect with several collecting terminals respectively
It connects；Optical line terminal is connected with a trunk optical fiber fibre core, and trunk optical fiber fibre core is connect with several passive optical splitters, several light nets
Network unit is connect with several passive optical splitters respectively；Differential protection host is used to acquire the first electrical quantity according to main bus-bar；It receives
From the second electrical quantity of bus；Difference current is calculated according to the first electrical quantity and the second electrical quantity；Sentenced according to difference current
Whether disconnected distribution line breaks down；If distribution line breaks down, differential protection host issues main circuit breaker and from disconnected
The trip signal of road device；Collecting terminal is used for basis from the second electrical quantity of bus synchronous acquisition；Differential protection can be achieved
Flexible expansion adapts to distribution network systems flexible and changeable wiring and the method for operation, adapts to the flexible access of distributed energy, it is ensured that match
Selectivity, the rapidity, reliability and sensitivity for netting protection realize the quick positioning and excision of failure；Meanwhile using passive light
Network can realize the flexible access of multiple terminals with a trunk optical fiber fibre core and several branch's fibre cores, can largely save optical fiber
Resource, and on the basis of guaranteeing net synchronization capability and 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 collecting terminal and information are called, and realize the differential protection to the power distribution network of power network.
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 (9)
1. a kind of power distribution network differential protective system, the power distribution network includes: main bus-bar, from bus and is connected to the main bus-bar
And the distribution line between bus, the main bus-bar is equipped with main circuit breaker, and it is described to be equipped with from bus from breaker, it is special
Sign is, the system comprises: differential protection host, several collecting terminals, optical line terminal and several optical-fiber network lists
Member；
The differential protection host is connect with the main bus-bar；
Several collecting terminals are connect with described from bus；
The optical line terminal is connect with the differential protection host；
Several optical network units are connect with several collecting terminals respectively；
The optical line terminal is connected with a trunk optical fiber fibre core, and the trunk optical fiber fibre core and several passive optical splitters connect
It connects, several optical network units are connect with several passive optical splitters respectively；
The differential protection host is used to acquire the first electrical quantity according to the main bus-bar；It receives described electrical from the second of bus
Amount；Difference current is calculated according to first electrical quantity and second electrical quantity；Institute is judged according to the difference current
State whether distribution line breaks down；If the distribution line breaks down, the differential protection host issues the master
Breaker and the trip signal from breaker；
The collecting terminal be used for according to described in from bus synchronous acquisition described in the second electrical quantity.
2. system according to claim 1, which is characterized in that the optical line terminal and the optical network unit only transmit
Commercial data.
3. system according to claim 2, which is characterized in that the optical line terminal and the optical network unit are with dedicated
Chip or FPGA are realized, as isolated system independent operating.
4. a kind of power distribution network differential protecting method is used for power distribution network differential protective system described in claim 1, the method packet
Include following steps:
The differential protection host acquires the first electrical quantity according to main bus-bar；
The differential protection host receives the second electrical quantity, second electrical quantity be the collecting terminal according to from
Bus synchronous acquisition obtains；
Difference current is calculated according to first electrical quantity and second electrical quantity in the differential protection host；According to institute
It states difference current and judges whether the distribution line breaks down；If the distribution line breaks down, the differential guarantor
Shield host issues the main circuit breaker and the trip signal from breaker.
5. method according to claim 4, which is characterized in that the differential protection host receives the second electrical quantity, specifically:
Electric quantity information is exchanged by proprietary protocol between the optical line terminal and the optical network unit, or passes through IEC 61850
Agreement exchanges SMV, GOOSE message and MMS message.
6. method according to claim 5, which is characterized in that pass through between the optical line terminal and the optical network unit
61850 agreement of IEC exchanges SMV, GOOSE message and MMS message, specifically: the SMV, the GOOSE message and the MMS
Message bandwidth allocation is using the method for fixing polling cycle and Dynamic Bandwidth Allocation.
7. method according to claim 6, which is characterized in that the SMV, GOOSE message and MMS message bandwidth allocation use
The method of fixed polling cycle and Dynamic Bandwidth Allocation, specifically:
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.
8. method according to claim 4, which is characterized in that the collecting terminal is adopted according to described synchronize from bus
Collection, specifically: realize that sample information is synchronous using compensation of delay means or ieee standard clock synchronization mode.
9. method according to claim 8, which is characterized in that described to use compensation of delay means or ieee standard clock synchronization mode
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 clock synchronization message extremely
The differential protection host；
The sampling pulse of the differential protection host is synchronized with pulse per second (PPS) or the clock synchronization message of the optical line terminal；
The optical network unit is realized synchronous by the pulse per second (PPS) 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 collecting terminal is synchronized with pulse per second (PPS) or the clock synchronization message of the optical network unit.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677183A (en) * | 2008-09-16 | 2010-03-24 | 河南省电力公司许昌供电公司 | Self-adaptive master-slave positioning method for three-terminal differential protection |
| CN204559113U (en) * | 2015-04-30 | 2015-08-12 | 国家电网公司 | Power distribution network multistage loop grid vertical connection phase segregated differential protection device |
| CN105896489A (en) * | 2016-05-11 | 2016-08-24 | 许继集团有限公司 | Differential protection method and system for multi-end T connected transmission line |
| CN106099879A (en) * | 2016-08-09 | 2016-11-09 | 深圳供电局有限公司 | Differential protection system and differential protection implementation method for flexible direct current distribution network line |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101350520B (en) * | 2008-09-17 | 2010-10-06 | 中国南方电网有限责任公司 | Protection control system and method base on electric network synthesis information |
| CN101938117B (en) * | 2010-10-14 | 2012-10-31 | 山东大学 | Current differential protection method for smart distribution network |
-
2016
- 2016-11-17 CN CN201611024117.9A patent/CN106602525B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677183A (en) * | 2008-09-16 | 2010-03-24 | 河南省电力公司许昌供电公司 | Self-adaptive master-slave positioning method for three-terminal differential protection |
| CN204559113U (en) * | 2015-04-30 | 2015-08-12 | 国家电网公司 | Power distribution network multistage loop grid vertical connection phase segregated differential protection device |
| CN105896489A (en) * | 2016-05-11 | 2016-08-24 | 许继集团有限公司 | Differential protection method and system for multi-end T connected transmission line |
| CN106099879A (en) * | 2016-08-09 | 2016-11-09 | 深圳供电局有限公司 | Differential protection system and differential protection implementation method for flexible direct current distribution network line |
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