CN108233344A - Power distribution network WAMS communications protections and feeder automation method based on multicast - Google Patents
Power distribution network WAMS communications protections and feeder automation method based on multicast Download PDFInfo
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Classifications
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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
- H02H7/263—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 measured values
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- H02J13/0013—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/15—Flow control; Congestion control in relation to multipoint traffic
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a kind of power distribution network WAMS communications protections based on multicast and feeder automation method, it is characterized in that the power distribution network WAMS traffic models based on multicast are set, for carrying power distribution network WAMS communication services；The communication reliability of power distribution network WAMS is improved using cast communication；Distribution line PDC and distribution line PMU based on multicast is set to realize intelligent distribution type feeder automation；Distribution line PMU and distributed generation resource access controller based on multicast is set to realize the grid-connected protection of distributed generation resource.The method of the present invention can effectively enhance the communication reliability of power distribution network WAMS, reduce fault location, Fault Isolation and perfect the time that area restores electricity, improve the reliability of feeder automation, reduce the risk that the grid-connected safe operation to power distribution network of distributed generation resource is brought.
Description
Technical field
The present invention relates to the communication pattern of power distribution network WAMS and feeder automation method, specifically a kind of matching based on multicast
Power grid WAMS communications protections and feeder automation method.
Background technology
Power distribution network WAMS (Wide Area Measurement System, wide-area monitoring systems) is to be applied to power distribution network
Wide-area monitoring systems, using synchronized phasor measurement technology, by arranging distribution line PDC in each distribution line outlet head end
(Phasor Data Concentrator, phasor data concentrator), in each section of arrangement distribution line PMU of distribution line
(Phasor Measurement Unit, synchronous phasor measurement unit), is realized main to distribution line synchronized phasor and power distribution network
The real time high-speed rate acquisition of data.
Distribution line PMU should have the functions such as acquisition, upload and the time synchronization of synchronized phasor data of traditional PMU,
Distant control function is extended simultaneously, the function of having distribution power automation terminal.
Distribution line PDC, should have the data summarization of traditional PDC, forwarding, Delay computing, communication protocol conversion and when
Between the functions such as synchronous, be provided simultaneously with the functions such as the file storage of a specified time, accident analysis and processing, have based on phasor information
Realize the function of feeder automation.
Power distribution network WAMS main websites should have the number of traditional WAMS main websites as city's level-one or the other WAMS main websites of even lower level
According to functions such as storage, file storage, fault location, publication orders.
BDS (BeiDou Navigation Satellite System, Beidou satellite navigation system), can be in the world
Interior round-the-clock, round-the-clock provides high-precision, highly reliable positioning, navigation, time service service, 10 nanosecond of time service precision for all types of user.
GBT 26865.2-2011 Real-Time Dynamic Monitoring System of Power system part 2s：Data Transport Protocol.
At present, there are the following problems for processing of the main station system to feeder fault in power distribution automation：When circuit breaks down
When, substation's wire-outgoing breaker tripping causes completely to have a power failure, and power failure range is big, reclosing after the short time, if unsuccessful reclosing,
It tripping again, main website carries out fault location according to the information that distribution terminal uploads, so as to carry out Fault Isolation, then order contact
Switch closes a floodgate, substation wire-outgoing breaker closes a floodgate, this process completes network reconfiguration and takes longer, and increases the dynamic of switch
Make number, reduce switch service life.In communication aspects, networking mode mostly " is handed in hand " networking, i.e. chain type networking, and communicate mould
Formula is mostly the point-to-point connection between client and server, if communication line section breaks down, causes faulty section downstream extremely
The problems such as communication of main website is all interrupted, loss of data, communication reliability is relatively low.In terms of the grid-connected protection of distributed generation resource, by
In distributed generation resource with tradition centralization power generation have very big difference, due to distributed power generation (Distributed Generation,
DG the new energy) used, such as solar energy and wind energy, have the characteristics that uncertain and discontinuous, while distributed generation resource has
There is the characteristics of capacity is small, quantity is more, power grid operation personnel do not have directly controls ability to distributed generation resource, this gives power distribution network
Running equipment safety, system safety and power quality bring risk.
Invention content
The present invention is to avoid the deficiency present in the above-mentioned prior art, providing a kind of power distribution network WAMS based on multicast and lead to
Letter protection and feeder automation method to improve communication reliability and communication efficiency in Distribution Automation Construction, are reduced in communication
The problem of disconnected and loss of data；Power failure range is big present in the feeder fault processing of improvement hubbed mode, completes network reconfiguration consumption
When longer, switch motion often the problem of；The enhancing monitoring grid-connected to distributed generation resource, reduction distributed generation resource is grid-connected to be matched
The risk that equipment safety, system safety and power quality in operation of power networks are brought.
The present invention is adopted the following technical scheme that solve technical problem：
Power distribution network WAMS communications protections the present invention is based on multicast are with the characteristics of feeder automation method：
Power distribution network WAMS traffic models based on multicast are set, for carrying power distribution network WAMS communication services；
The communication reliability of power distribution network WAMS is improved using cast communication；
Distribution line PDC and distribution line PMU based on multicast is set to realize intelligent distribution type feeder automation；
Distribution line PMU and distributed generation resource access controller based on multicast is set to realize the grid-connected guarantor of distributed generation resource
Shield.
Power distribution network WAMS communications protections the present invention is based on multicast are lain also in the characteristics of feeder automation method：Described
In power distribution network WAMS traffic models based on multicast, in each one distribution line PDC of substation installation, to monitor and manage change
Distribution line PMU on a plurality of distribution line of power station outlet equips multiple distribution line PMU on every distribution line；Each
The distributed generation resource for accessing distribution line equips a distribution line PMU, and the distribution line PMU of distributed generation resource equipment belongs to point
The distribution line of cloth plant-grid connection；Power distribution network WAMS main websites, distribution line PDC and distribution line PMU are awarded by BDS or GPS
When, each distribution line PMU corresponds to one switch of control, and the switch includes breaker and interconnection switch, the interconnection switch
For being attached between the distribution line of different substation outlet, connected two distribution lines is made to become a contact
Circuit；It is primary distribution line that power distribution network WAMS main websites, which set one of distribution line PDC at an interconnector both ends,
PDC, another distribution line PDC are spare distribution line PDC；Feeder line fault and communication line do not occur in interconnector
During the failure of road, it is responsible for the feeder automation task of whole interconnector by the primary distribution line PDC；Occur in interconnector
After feeder line fault and communication line failure, primary distribution line PDC and spare distribution line PDC automatically take on different distribution
The feeder automation task of part of path；The distribution line PDC undertakes the distribution wire section of feeder automation task for it, together
When undertake the management of distribution line PMU and data forwarding task on the distribution wire section.
Power distribution network WAMS communications protections the present invention is based on multicast are lain also in the characteristics of feeder automation method：It is described to adopt
The communication reliability that power distribution network WAMS is improved with cast communication refers to：In the power distribution network WAMS based on multicast, the interconnection
The distribution line PMU of road sends the data to distribution line PDC and distributed generation resource access controller by multicast；One is matched
Electric line PMU sends a data to its preset multicast address, and interchanger is with forwarding the data to multiple addition multicasts
The distribution line PDC of location realizes that some transmission communicates to connect multipoint reception between distribution line PMU and distribution line PDC,
The system resource of distribution line PMU and the bandwidth of communication line are saved, communication network is reduced and the possibility of congestion occurs, is improved logical
Believe efficiency；All distribution line PDC for adding in distribution line PMU multicast address preserve a few days for received data information,
Realize that distribution line PMU uploads the redundancy backup of data；When the communication line of an interconnector breaks down, primary distribution wire
Road PDC fails to receive the upload data of fault zone downstream distribution line PMU, and spare distribution line PDC fails to receive event
Hinder the upload data of region upstream distribution line PMU, judge that communication line breaks down by distribution line PDC, primary distribution wire
Road PDC exits the feeder automation task of fault zone downstream line, by spare distribution line PDC taking over fault region downstream line
The feeder automation task on road is then uploaded the fault zone downstream distribution line PMU's after failure by spare distribution line PDC
Data are uploaded, enable all distribution after failure on the interconnector that power distribution network WAMS main websites completion communication line breaks down
The upload data of circuit PMU.
Power distribution network WAMS communications protections the present invention is based on multicast are lain also in the characteristics of feeder automation method：The base
Realize that intelligent distribution type feeder automation carries out as follows in the distribution line PDC and distribution line PMU of multicast：
Step 1, when feeder line fault occurs for interconnector, distribution line PMU is uploaded by multicast comprising faulty
The synchronized phasor data of information are to primary distribution line PDC and spare distribution line PDC；The primary distribution line PDC and standby
Pass through data analysis positioning failure region with distribution line PDC；
Step 2 controls the distribution line PMU on corresponding position by primary distribution line PDC, makes to be in fault zone both ends
Switch disconnect, to complete Fault Isolation；And by the distribution line PMU on primary distribution line PDC control corresponding positions, make connection
Network switch closes a floodgate, and to complete restoration, completes intelligent distribution type feeder automation task；If primary distribution wire
Road PDC fails to remove failure in the setting time after line fault occurs, by spare distribution line PDC control corresponding positions
Distribution line PMU, the switch for making to be in fault zone both ends disconnects；And by spare distribution line PDC control corresponding positions
Distribution line PMU, interconnection switch is made to close a floodgate, complete intelligent distribution type feeder automation task；Primary distribution line PDC is exited
The feeder automation task of fault zone downstream line；The feeder line of spare distribution line PDC taking over fault region downstream circuit is certainly
Dynamicization task.
Power distribution network WAMS communications protections the present invention is based on multicast are lain also in the characteristics of feeder automation method：The base
Realize that the grid-connected protection of distributed generation resource refers in the distribution line PMU and distributed generation resource access controller of multicast：Distributed electrical
Source access controller adds in the multicast address of distributed generation resource grid entry point both sides distribution line PMU, receives and analyzes distribution line
The upload data of PMU, judge whether distributed generation resource grid entry point both sides meet combined floodgate condition, when judging to meet combined floodgate condition,
By the switch on distributed plant-grid connection controller control corresponding position, switch is made to close a floodgate；When distribution wire trackside and divide
When cloth mains side is abnormal situation, distributed generation resource access controller receives and analyzes the upload data of distribution line PMU,
Judge that distribution wire trackside and distributed electrical source are abnormal situation, control corresponding position upper switch, make switch separating brake.
Compared with prior art, the present invention has the advantages that：
1st, the present invention is matched using the communication service of the traffic model carrying power distribution network WAMS of the power distribution network WAMS based on multicast
Electric line PMU sends the data to multiple distribution line PDC, PDC points of the distribution line at same interconnector both ends by multicast
It is not set as primary and backup equipment, primary and backup distribution line PDC can carry out interconnection road distribution line PMU
Control, and the upload data of the distribution line PMU of reception are stored, it realizes on the redundancy protecting and distribution line PMU of communication network
The redundancy backup of data is passed, improves the communication efficiency and reliability of power distribution network WAMS.
2nd, the present invention is provided with a kind of method that the power distribution network WAMS based on multicast realizes intelligent distribution type feeder automation,
Using methods of the distribution line PDC as power distribution network substation, the upload data of distribution line PMU are analyzed by distribution line PDC, from
And the distribution line PMU on corresponding position is controlled to operate the switch on corresponding position, it realizes and failure is rapidly completed determines
Position, Fault Isolation and perfect area and restore electricity, avoid that power failure range present in the processing of hubbed mode feeder fault is big, completes
The problem of network reconfiguration takes longer, switch motion often.
3rd, the present invention is provided with distribution line PMU and distributed generation resource access controller realization distributed electrical based on multicast
A kind of method of the grid-connected protection in source by arranging distribution line PMU in distributed electrical source, acquires the synchronization of distributed electrical source
Phasor realizes the monitoring to distributed generation resource；Distributed generation resource access controller is by adding in distributed generation resource grid entry point both sides
The multicast address of distribution line PMU receives and analyzes the upload data of distribution line PMU, in distributed generation resource networking, control
Corresponding position upper switch is closed a floodgate, and when distribution wire trackside and distributed electrical source are abnormal situation, are controlled and is opened on corresponding position
Close separating brake, realize the grid-connected protection to distributed generation resource, reduce distributed generation resource it is grid-connected to the running equipment safety of power distribution network,
The risk that system safety and power quality are brought.
Description of the drawings
Fig. 1 is that the present invention is based on multicast power distribution network WAMS communications protections and feeder automation structure under the simply connected network mode of connection
Figure；
Fig. 2 is that the present invention is based on multicast power distribution network WAMS communications protections and feeder automation structure under the multi-joint network mode of connection
Figure；
Fig. 3 is that the present invention realizes the method collaboration diagram for improving power distribution network WAMS communication reliabilities；
Fig. 4 is the method collaboration diagram that the present invention realizes intelligent distribution type feeder automation；
Fig. 5 is the method collaboration diagram that the present invention realizes distributed generation resource networking；
Fig. 6 is the method collaboration diagram that the present invention realizes distributed generation resource error protection；
Fig. 7 is the work flow diagram that the present invention realizes primary distribution line PDC in intelligent distribution type feeder automation.
Specific embodiment
Power distribution network WAMS communications protections in the present embodiment based on multicast are with feeder automation method：
Power distribution network WAMS traffic models based on multicast are set, for carrying power distribution network WAMS communication services；Referring to Fig. 1 and
Fig. 2, equipment of the present invention include distribution line PDC, distribution line PMU, interchanger, all kinds of switches of distribution line and divide
Cloth plant-grid connection controller, main website, distribution line PDC and distribution line PMU are by BDS/GPS time services；Based on multicast
In power distribution network WAMS traffic models, in each one distribution line PDC of substation installation, to monitor and manage substation's outlet
Distribution line PMU on a plurality of distribution line equips multiple distribution line PMU on every distribution line, referring to Fig. 1 and Fig. 2, compiles
Several distribution line PMU are arranged on the circuit of three substation's outlets of number A, B, D, one is arranged in the head end of circuit
A distribution line PDC is numbered according to the difference of substation, distribution line PDC and distribution line PMU is numbered, such as A power transformations
The distribution line PDC numbers stood on a distribution line of outlet are PDCa, and distribution line PMU is referred to as PMUa, PMUa press away from
Distance number from distribution line head end, closest number is PMUa1, the number PMUa2 of next, successively recursion, and A, B become
Distribution line PMU number of the power station respectively at the interconnection switch of two distribution lines of outlet is PMUab；Each access distribution wire
The distributed generation resource on road equips a distribution line PMU, and the distribution line PMU of distributed generation resource equipment belongs to distributed generation resource and connects
Distributed generation resource number is DG referring to Fig. 1 and Fig. 2 by the distribution line entered, and the distribution line PMU numbers for monitoring DG are PMUc,
Distributed generation resource access controller number is DGC；Power distribution network WAMS main websites, distribution line PDC and distribution line PMU are by BDS
Or GPS time services, each distribution line PMU correspond to one switch of control, switch includes block switch breaker and interconnection switch breaks
Road device as depicted in figs. 1 and 2, row number is put into, such as the corresponding switches of PMUa1 are compiled according to the number of distribution line PMU is split
Number for ka1, interconnection switch makes connected two distribution for being attached between the distribution line of different substation outlet
Circuit become an interconnector, as depicted in figs. 1 and 2, A, B substation distinguish outlet two distribution lines be connected after into
For an interconnector, it is ab to be numbered；Power distribution network WAMS main websites set one of distribution at an interconnector both ends
Circuit PDC is primary distribution line PDC, another distribution line PDC is spare distribution line PDC, as shown in Figure 1, Figure 3 and Figure 4
Shown, the PDCa of main website setting ab interconnectors is primary distribution line PDC, and PDCb is spare distribution line PDC；Such as Fig. 1 and
Shown in Fig. 2, switch is distributed on interconnector, and interconnector is divided into a section distribution wire section, distribution line PMU, is matched
Data transmission basis is formed by using interchanger Switch and fibre circuit between electric line PDC and main website, in interconnector not
When feeder line fault and communication line failure occurs, the feeder line for being responsible for whole interconnector by primary distribution line PDC is automatic
Change task, with reference to GBT 26865.2-2011, main website is to the order connection of distribution line PDC, the number of distribution line PDC to main website
It is TCP (Transmission Control that the order of distribution line PMU, which is connected, with distribution line PDC according to connection
Protocol transmission control protocols) it connects, TCP has the advantages that reliable and stablizes；Feeder line fault occurs in interconnector
After communication line failure, primary distribution line PDC and spare distribution line PDC automatically take on the feeder line in different distribution wire sections
Automation task；Distribution line PDC undertakes the distribution wire section of feeder automation task, while undertake distribution wire section for it
The management of upper distribution line PMU and data forwarding task as shown in Figure 1, Figure 2, Fig. 3 and Fig. 4, are matched when PDCa exits fault zone downstream
After the feeder automation task in electric wire section, the upload of PMUa, PMUb on the distribution wire section of fault zone downstream are no longer forwarded
Data after the feeder automation task in PDCb taking over fault region downstream distribution wires section, start that fault zone downstream is forwarded to match
The upload data of PMUa, PMUb on electric wire section.
The communication reliability of power distribution network WAMS is improved using cast communication, is referred to：In the power distribution network WAMS based on multicast,
Distribution line PMU on interconnector sends the data to distribution line PDC and distributed generation resource access controller by multicast,
Since multicast is using UDP (User Datagram Protocol, User Datagram Protocol) transmission mode, there is no error correction machine
System, is difficult to make up after packet loss mistake packet occurs, so the present invention is connected by the order based on TCP connection, expands PMU data weight
The function of hair increases certain fault tolerant mechanism, and referring to Fig. 3, Fig. 4, Fig. 5 and Fig. 6, TCP connection is solid line, and UDP is connected as dotted line；
One distribution line PMU sends a data to its preset multicast address, and multicast address is selected from local management multicast address
It takes, only in specific local scope effectively, interchanger forwards the data to multiple distribution line PDC for adding in multicast address,
It realizes a little to send between distribution line PMU and distribution line PDC and multipoint reception is communicated to connect, such as Fig. 1 and Fig. 3, with
For PMUa1, PMUa1 one-shot measurement obtained quantity framing into a data frame, send out by the multicast address that data frame is set to it
It send once, it, will by Switch after data frame reaches Switch since PDCa and PDCb adds the multicast address of PMUa1
Data frame is transmitted to PDCa and PDCb, and PDCa and PDCb can receive the data frame of PMUa1, the system for saving distribution line PMU
The bandwidth of resource and communication line reduces communication network and the possibility of congestion occurs, improves communication efficiency；All addition distribution wires
The distribution line PDC of road PMU multicast address preserves a few days for received data information, realizes that distribution line PMU uploads number
According to redundancy backup, such as Fig. 1 and Fig. 3, PDCa, PDCb store the data frame of the PMUa of reception and PMUb, data preserve
At least 7 days；When the communication line of an interconnector breaks down, primary distribution line PDC fails to receive under fault zone
The upload data of distribution line PMU are swum, spare distribution line PDC fails to receive the upper of fault zone upstream distribution line PMU
Data are passed, judge that communication line breaks down by distribution line PDC, primary distribution line PDC exits fault zone downstream line
Feeder automation task, by the feeder automation task of spare distribution line PDC taking over fault region downstream circuit, then by
The upload data of fault zone downstream distribution line PMU after spare distribution line PDC uploads failure, make power distribution network WAMS main websites
The upload data of all distribution line PMU after failure are able on the interconnector that completion communication line breaks down.Such as Fig. 1 and
Fig. 3, when communication line is normal, PDCa and PDCb can receive all upload data of PMUa and PMUb, if PMUa2 and PMUa3
Between communication line disconnection fault occurs suddenly, after breaking down, PDCa be only capable of receive PMUa1 and PMUa2 data frame, nothing
Method receives the data frame of remaining PMUa and PMUb, and PDCa is by ordering connection to the PMUa and PMUb in addition to PMUa1 and PMUa2
Send command frame, it is desirable that retransmission data, but since communication line interrupt will not be replied, PDCb can not receive PMUa1 and
The data frame of PMUa2 can receive the data frame of remaining PMUa and PMUb, and PDCb is by ordering connection to except PMUa1 and PMUa2
Send command frame, it is desirable that retransmission data, but since communication line interrupt will not be replied；Reference GBT26865.2-2011,
PDCa is when by the data frame set of PMUa1 and PMUa2 to a data frame, by the status word STAT words of remaining PMUa and PMUb
The Bit15 of section puts 1 expression data exception, and PDCb is when by the data frame framing received, by the STAT fields of PMUa1 and PMUa2
Bit 15 put 1 expression data exception；PDCa sends the data frame after gathering, main website as primary distribution line PDC to main website
After the data frame for receiving PDCa, DC_IDCODE is identified according to the Bit 15 of each STAT fields of data frame and data concentrator
Field with reference to the power distribution network topology diagram that main website stores, judges that the part PMU data of ab interconnectors is lost；Failure occurs
After a certain period of time, replies of the PDCa and PDCb due to repeatedly cannot get corresponding PMUa and PMUb, judges that communication line breaks down,
PDCa exits PMUa3 to the feeder automation task in PMUb1 distribution wires section, by PDCb take overs PMUa3 to PMUb1 distribution lines
The feeder automation task of section is then uploaded the upload data of the PMUa3 to PMUb1 after failure by PDCb；Main website receives PDCb
Data frame after, judge to have lost data according to the DC_IDCODE fields of data frame, century second SOC fields and STAT fields
Polishing, while can be confirmed that communication line failure occurs for ab interconnectors, it is fault zone between positioning PMUa2 and PMUa3.
Above-mentioned communication line failure is happened at the communication line between distribution line PMU, and communication line failure may also be sent out
Life is between distribution line PDC and main website, if disconnection fault occurs suddenly for the communication line of PDCa to main website, main website can not receive
The data frame and heartbeat signal of PDCa, after a certain period of time main station judging and PDCa disconnect, main website sends command frame to PDCb,
PDCb is ordered to open data transmission, PDCb starts to upload data frame to main website, and main website is according to the SOC fields of data frame, to PDCb
Command frame is sent, the PMU of main website missing stored in PDCb is transferred and uploads data, so as to which data are lost in completion.
Distribution line PDC and distribution line PMU based on multicast is set to realize intelligent distribution type feeder automation, is by such as
Lower step carries out：
Step 1, when feeder line fault occurs for interconnector, distribution line PMU is uploaded by multicast comprising faulty
The synchronized phasor data of information are to primary distribution line PDC and spare distribution line PDC；Primary distribution line PDC and spare match
Electric line PDC passes through data analysis positioning failure region.As shown in Fig. 1, Fig. 4 and Fig. 7, when power circuit is normal, PMUa, PMUb
Obtained quantity framing will be measured and be sent to PDCa, PDCb into data frame, after PDCa, PDCb receive data frame, analyze data frame, reference
GBT 26865.2-2011, STAT fields and fixed point phasor data PHASORS fields in data frame judge that circuit is normal；
If short trouble occurs suddenly for the power circuit between PMUa2 and PMUa3, after breaking down, PMUa measures the phasor number of gained
According to that will contain fault message, PMUa, PMUb are sent to PDCa, PDCb by obtained quantity framing is measured into data frame, and PDCa, PDCb connect
After receiving data frame, data buffer storage is carried out first, then analyzes data frame, the PMU mark PMU_IDCODE words in data frame
Section, STAT fields and PHASORS fields judge that short trouble and positioning failure region occur for circuit, and PDCa is proceeded by failure
Reason.
Step 2 controls the distribution line PMU on corresponding position by primary distribution line PDC, makes to be in fault zone both ends
Switch disconnect, to complete Fault Isolation；And by the distribution line PMU on primary distribution line PDC control corresponding positions, make connection
Network switch closes a floodgate, and to complete restoration, completes intelligent distribution type feeder automation task；If primary distribution wire
Road PDC fails to remove failure in the setting time after line fault occurs, by spare distribution line PDC control corresponding positions
Distribution line PMU, the switch for making to be in fault zone both ends disconnects；And by spare distribution line PDC control corresponding positions
Distribution line PMU, interconnection switch is made to close a floodgate, complete intelligent distribution type feeder automation task；Primary distribution line PDC is exited
The feeder automation task of fault zone downstream line；The feeder line of spare distribution line PDC taking over fault region downstream circuit is certainly
Dynamicization task.Such as Fig. 1, Fig. 4 and Fig. 7, PDCa sends command frame to the PMUa2 and PMUa3 at failure both ends, order PMUa2 and
PMUa3 is disconnected to inductive switch, and command frame is sent to PMUab, order PMUab combined floodgate interconnection switches kab, PMUa2, PMUa3 and
PMUab performs the corresponding command after receiving command frame, realizes Fault Isolation and perfects area and restores electricity, and completes intelligent distributed feeder line
Automation task；Since the message transmission rate of distribution line PMU to distribution line PDC is optional rate, by taking 50 frames/s as an example,
It is primary that distribution line PMUa per 20ms sends the data to distribution line PDCa, measures failure phasor data from PMUa and is sent to
PDCa includes the data of fault message to PDCa receptions, the corresponding command frame is beamed back after analysis, then receive command frame to corresponding PMUa
And complete to order, including considering network delay, in total time-consuming 100ms, if the data of distribution line PMU to distribution line PDC pass
Defeated rate selects higher level, and taking can be shorter；If judging line failure after a certain period of time in PDCb, PDCb according to
The data frame for including fault message of PMUa uploads is so received, PDCb judges that PDCa is not timely completed feeder automation task,
PDCb sends command frame to the PMUa2 and PMUa3 at failure both ends, and PMUa2 and PMUa3 is ordered to disconnect to inductive switch, is sent out to PMUab
Command frame is sent, order PMUab combined floodgate interconnection switches kab, PMUa2, PMUa3 and PMUab perform the corresponding command after receiving command frame,
It realizes Fault Isolation and perfects area and restore electricity, complete intelligent distribution type feeder automation task；PDCa exits PMUa3 extremely
The feeder automation task in PMUb1 distribution wires section, by PDCb take overs PMUa3 to the feeder automation in PMUb1 distribution wires section
Task.
Distribution line PMU and distributed generation resource access controller based on multicast is set to realize the grid-connected guarantor of distributed generation resource
Shield, refers to：Distributed generation resource access controller adds in the multicast address of distributed generation resource grid entry point both sides distribution line PMU, connects
The upload data of distribution line PMU are received and analyzed, judge whether distributed generation resource grid entry point both sides meet combined floodgate condition, work as judgement
When meeting combined floodgate condition, by matching the switch on distributed plant-grid connection controller control corresponding position, switch is made to close a floodgate, such as Fig. 1
And Fig. 5, distributed generation resource access controller DGC add in the multicast address of PMUb2, PMUb3 and PMUc, receive and analyze PMUb2,
The data frame that PMUb3 and PMUc is uploaded, judges whether the mains frequency, voltage magnitude, voltage-phase of grid entry point both sides reach conjunction
Lock condition, when reaching combined floodgate condition, DGC controls kc closes a floodgate, DG networkings, and otherwise DGC is failure to actuate；When distribution wire trackside and distribution
When formula mains side is abnormal situation, distributed generation resource access controller receives and analyzes the upload data of distribution line PMU, sentences
Break and distribution wire trackside and distributed electrical source is abnormal situation, control corresponding position upper switch, make switch separating brake, referring to figure
1 and Fig. 6, DGC add in PMUb2, PMUb3 and PMUc multicast address, receive and analyze PMUb2, PMUb3 and PMUc upload number
According to frame, when grid entry point both sides fault-free occurs, the data frame that PMUb2, PMUb3 and PMUc are uploaded does not include fault message, and DGC is not
Action；If feeder line fault occurs in distribution line, the data frame packet that PMUb2, PMUb3 are uploaded receives simultaneously containing fault message, DGC
After analyzing the data frame that PMUb2, PMUb3 and PMUc are uploaded, kc separating brakes are controlled, DG is avoided to continue to provide short circuit electricity to trouble point
Stream；The data frame that DGC can also be uploaded by receiving and analyzing PMUb2, PMUb3 and PMUc realizes anti-isolated island protection.
Claims (5)
1. a kind of power distribution network WAMS communications protections based on multicast and feeder automation method, it is characterised in that：
Power distribution network WAMS traffic models based on multicast are set, for carrying power distribution network WAMS communication services；
The communication reliability of power distribution network WAMS is improved using cast communication；
Distribution line PDC and distribution line PMU based on multicast is set to realize intelligent distribution type feeder automation；
Distribution line PMU and distributed generation resource access controller based on multicast is set to realize the grid-connected protection of distributed generation resource.
2. the power distribution network WAMS communications protections according to claim 1 based on multicast and feeder automation method, feature
It is：In the power distribution network WAMS traffic models based on multicast, in each one distribution line PDC of substation installation, with
The distribution line PMU on a plurality of distribution line of substation's outlet is monitored and managed, multiple distribution are equipped on every distribution line
Circuit PMU；The distributed generation resource of each access distribution line equips a distribution line PMU, the distribution of distributed generation resource equipment
Circuit PMU belongs to the distribution line of distributed generation resource access；Power distribution network WAMS main websites, distribution line PDC and distribution line PMU are equal
By BDS or GPS time services, each distribution line PMU corresponds to one switch of control, and the switch includes breaker and interconnection switch,
The interconnection switch makes connected two distribution lines for being attached between the distribution line of different substation outlet
As an interconnector；Power distribution network WAMS main websites are set based on one of distribution line PDC at an interconnector both ends
With distribution line PDC, another distribution line PDC is spare distribution line PDC；Power circuit event does not occur in interconnector
When barrier and communication line failure, it is responsible for the feeder automation task of whole interconnector by the primary distribution line PDC；Joining
After feeder line fault and communication line failure occur for winding thread road, primary distribution line PDC and spare distribution line PDC are held automatically
Carry on a shoulder pole the feeder automation task in different distribution wire sections；The distribution line PDC undertakes matching for feeder automation task for it
Electric wire section, while undertake the management of distribution line PMU and data forwarding task on the distribution wire section.
3. the power distribution network WAMS communications protections according to claim 2 based on multicast and feeder automation method, feature
It is：The communication reliability that power distribution network WAMS is improved using cast communication is referred to：In the power distribution network WAMS based on multicast,
Distribution line PMU on the interconnector sends the data to distribution line PDC and distributed generation resource access control by multicast
Device processed；One distribution line PMU sends a data to its preset multicast address, and interchanger forwards the data to multiple additions
The distribution line PDC of the multicast address realizes that some transmission connects multiple spot between distribution line PMU and distribution line PDC
Communication connection is received, saves the system resource of distribution line PMU and the bandwidth of communication line, that reduces that congestion occurs in communication network can
Energy property, improves communication efficiency；All distribution line PDC for adding in distribution line PMU multicast address believe received data
Breath preserves a few days, realizes that distribution line PMU uploads the redundancy backup of data；When event occurs for the communication line of an interconnector
Barrier, primary distribution line PDC fail to receive the upload data of fault zone downstream distribution line PMU, spare distribution line PDC
Fail to receive the upload data of fault zone upstream distribution line PMU, by distribution line PDC judge communication line occur therefore
Barrier, primary distribution line PDC exit the feeder automation task of fault zone downstream line, are taken over by spare distribution line PDC
The feeder automation task of fault zone downstream line is then uploaded by spare distribution line PDC under the fault zone after failure
The upload data of distribution line PMU are swum, are enable on the interconnector that power distribution network WAMS main websites completion communication line breaks down
The upload data of all distribution line PMU after failure.
4. the power distribution network WAMS communications protections according to claim 2 based on multicast and feeder automation method, feature
It is：The distribution line PDC and distribution line PMU based on multicast realize intelligent distribution type feeder automation as follows
It carries out：
Step 1, interconnector occur feeder line fault when, distribution line PMU by multicast upload includes fault message
Synchronized phasor data to primary distribution line PDC and spare distribution line PDC；The primary distribution line PDC and spare match
Electric line PDC passes through data analysis positioning failure region；
Step 2 controls the distribution line PMU on corresponding position by primary distribution line PDC, makes to be in opening for fault zone both ends
Shutdown is opened, to complete Fault Isolation；And by the distribution line PMU on primary distribution line PDC control corresponding positions, open contact
Lock is closed, to complete restoration, completes intelligent distribution type feeder automation task；If primary distribution line
PDC fails to remove failure in the setting time after line fault occurs, by spare distribution line PDC control corresponding positions
Distribution line PMU disconnects the switch for being in fault zone both ends；And by spare distribution line PDC control corresponding positions
Distribution line PMU, makes interconnection switch close a floodgate, and completes intelligent distribution type feeder automation task；Primary distribution line PDC exits event
Hinder the feeder automation task of region downstream circuit；The feeder line of spare distribution line PDC taking over fault region downstream circuit is automatic
Change task.
5. the power distribution network WAMS communications protections according to claim 1 based on multicast and feeder automation method, feature
It is：The distribution line PMU and distributed generation resource access controller based on multicast realize that the grid-connected protection of distributed generation resource is
Refer to：Distributed generation resource access controller adds in the multicast address of distributed generation resource grid entry point both sides distribution line PMU, receives and divides
The upload data of distribution line PMU are analysed, judge whether distributed generation resource grid entry point both sides meet combined floodgate condition, are closed when judging to meet
During lock condition, by the switch on distributed plant-grid connection controller control corresponding position, switch is made to close a floodgate；Work as distribution wire
When trackside and distributed electrical source are abnormal situation, distributed generation resource access controller receives and analyzes distribution line PMU's
Data are uploaded, judges that distribution wire trackside and distributed electrical source are abnormal situation, controls corresponding position upper switch, make switch
Separating brake.
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