CN106972521A - The soft straight control model recognition methods of power network - Google Patents
The soft straight control model recognition methods of power network Download PDFInfo
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- CN106972521A CN106972521A CN201710308981.XA CN201710308981A CN106972521A CN 106972521 A CN106972521 A CN 106972521A CN 201710308981 A CN201710308981 A CN 201710308981A CN 106972521 A CN106972521 A CN 106972521A
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- Prior art keywords
- direct current
- network
- transmission system
- flexible direct
- soft
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Classifications
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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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- 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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
- H02J2003/365—Reducing harmonics or oscillations in HVDC
-
- 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]
-
- 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
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Abstract
A kind of soft straight control model recognition methods of power network, according to PMU provide power network multiple spot various dimensions information, the soft direct line system network topology model of multiterminal is built based on Object-oriented Technique, it is theoretical using the topological tracking of advanced quick indexing and statistical analysis, to the whole network or the topological tracking of local progress.When the soft lineal system membership of multiterminal changes, this method is by analyzing the similar sex differernce between the electrical quantity such as the on off state in system, node voltage and each branch current, quickly tracking and identification network state change, the method for operation of the soft lineal system of adjustment multiterminal.Topological structure of electric parameter information can be provided for the soft straight control system of multiterminal simultaneously, change of current station control system carries out Load flow calculation and accident analysis according to the parameter information, basic data is provided for the stable state control of current conversion station.
Description
Technical field
The invention belongs to direct current transportation control technology field, and in particular to (i.e. multiterminal are soft based on complex control network for one kind
Straight main electrical scheme network) under soft straight control model automatic identification technology, the technology can be according to straight-flow system network topology knot
Structure determines the method for operation of the soft lineal system of multiterminal, and can be to the quick change for recognizing network state, the soft lineal system of adjust automatically
The method of operation.Improve the economy and stability of soft straight system operation.
Background technology
Flexible DC power transmission has independent control active power and reactive power, and can keep straight when trend is inverted
Flow polarity of voltage constant, the characteristics of DC current direction is inverted.Soft straight current conversion station for DC side equivalent to current source, very
Be conducive to constituting multi-terminal direct current transmission system in parallel.Due to the control feature of soft lineal system, determine that the soft lineal system of multiterminal can be with
There are a variety of methods of operation.The MTDC transmission system method of operation is relevant with the control mode of power transmission direction and straight-flow system, together
When with the straight-flow system mode of connection also have very important relation.In the case that the straight-flow system mode of connection changes, such as
Fruit adjusts the method for operation of soft lineal system not in time, and the stable operation of soft lineal system will be impacted.So multiterminal are flexible
DC transmission system can select the rational method of operation, to Multi-end flexible direct current transmission system according to grid topological relation
The stable operation of system is most important.
Summary content, the present invention proposes a kind of soft straight control model recognition methods automatic identification technology of power network, should
Technology can carry out soft straight Network Topology Analysis according to the on off state of AC system and straight-flow system, effective in real time
Tracking and the running status change of identification power network.For the stable state calculating of soft lineal system, direction of tide differentiate, operational mode judges
Topological structure of electric parameter information is provided with accident analysis etc..Multiterminal flexible direct current control system according to the parameter information, it is determined that
The method of operation of Multi-end flexible direct current transmission system, coordinates each current conversion station operation of soft straight internal system, meets soft straight transmission system
Control is required.
The content of the invention
To solve problem above present in prior art, the invention discloses a kind of Multi-end flexible direct current transmission system level
Cooperative control device.Realize the coordination control of Multi-end flexible direct current transmission system.
The present invention specifically uses following technical scheme：
A kind of soft straight control model recognition methods of power network, it is characterised in that：Methods described is according to straight-flow system network topology knot
Structure determines the method for operation of the soft lineal system of multiterminal, the change of quick identification straight-flow system network state, the soft lineal system of adjust automatically
The method of operation, ensure the stable operation of the soft lineal system of multiterminal.
The soft straight control model recognition methods of a kind of power network, it is characterised in that the recognition methods comprises the following steps：
Step 1：The multiple spot various dimensions information of Multi-end flexible direct current transmission system network, bag are gathered by phasor measurement unit PMU
Include breaker, disconnecting link, transformer, transverter, bus and line state information and the Multi-end flexible direct current transmission system network operation
Parameter；Wherein, multiple spot refers to multiple data acquisition nodes in system, the as state point of all devices and route survey point.Dimension
Degree is defined according to system architecture, and different levels and the equipment in region can be divided into different dimensions in straight-flow system network
Spend scope.
Step 2：Based on Object-oriented Technique by the equipment with same operation characteristic, it is divided into same equipment group；Will
Multimode device map is multinode, and the parent object of each node is this device object, by Multi-end flexible direct current transmission system
It is connection cable node and annexation that equipment in network, which is connected abstract, and all abstract electric attribute of every kind of equipment is node
Attribute and annexation attribute, are built into current conversion station model, then constitute multiterminal flexible direct current by current conversion station model by device model
Transmission system network topology model；
Step 3：The Multi-end flexible direct current transmission system network topology model generated according to step 2, using BFS plan
Slightly the network topology model is traveled through, while completing identification and the network partition of branch type；Opened up by quick indexing
Tracking is flutterred to carry out Multi-end flexible direct current transmission system network state (network state refers to the topological structure of multi-terminal system)
Real-time tracking, the method for operation of Multi-end flexible direct current transmission system is changed according to the change of the topological structure of straight-flow system network.
The soft straight control model recognition methods of the power network can provide topological structure of electric for the soft straight control system of multiterminal
Parameter information.Multiterminal flexible direct current control system carries out Load flow calculation and accident analysis, is current conversion station according to the parameter information
Stable state control provide basic data.
The soft straight control model recognition methods of the power network is using the topological tracking of quick indexing, soft straight to multiterminal
While system initial network structure carries out static traversal, the judgement and network structure for completing each current conversion station method of operation are drawn
Point.When the soft lineal system branch of a network state of multiterminal changes, this method is using quick indexing search rule to network topology
It is updated, and the soft lineal method of operation united of multiterminal is generated according to new topological structure.
Brief description of the drawings
Fig. 1 is the soft straight system converter station model of multiterminal；
Fig. 2 is the soft straight system converter station topological model of multiterminal.
Embodiment
Technical scheme is described in further detail with reference to explanation accompanying drawing.
It is multiterminal flexiblesystem current conversion station model as shown in Figure 1.The soft straight control model automatic identification technology of multiterminal is the change of current
Model of standing is equivalent into one group of cluster tool being made up of some connecting lines being mutually related between equipment and equipment, including disconnected
Road device, disconnecting link, transformer, transverter, bus and circuit etc..With reference to IEC61970 standards, current conversion station model is provided.According to changing
Stream station model is the set of one group of interrelated equipment, divides each current conversion station equipment that is mutually related when dividing current conversion station
To together, while to consider the characteristic of equipment, the equipment with identical device characteristics is divided into same equipment group.To be many
Status devices are mapped as multinode, and the parent object of each node is this device object, and it is connection cable that equipment, which is connected abstract,
Node and annexation, the electric attribute of every kind of equipment are all abstract for node and the attribute of relation.In view of answering for analysis process
Equipment in miscellaneous program, each current conversion station can not be excessive, otherwise state that may be present can be caused excessive.Current conversion station model is built
After vertical, then by current conversion station model with constituting Multi-end flexible direct current transmission system network model, and the topology information of network is put in storage
Afterwards, the base reference data inquired about, analyze and judged as multiterminal flexible direct current system operational mode.
It is illustrated in figure 2 multiterminal flexiblesystem current conversion station topological model.The soft straight control model automatic identification technology of multiterminal will
The soft lineal system of multiterminal is connected with each other by each end points of current conversion station model turns into connecting node, and topology is constituted by topological analysis
Node, topological node is connected with each other current conversion station to be connected to by circuit forms topological island together.It is the soft lineal system of multiterminal first
Topology Analysis Based, its function is how many topological node, multiterminal connected into by close circuit breaker for the DC line for analyzing the soft lineal system in end
The result of soft lineal system Topology Analysis Based is that each current conversion station is divided into several topological nodes, is referred to as node analysis.
The connecting node of current conversion station is analyzed, these end points are divided into the branch road of connection.Next to that the soft lineal system network topology point of multiterminal
Analysis, task is that the topological node for analyzing whole system connects into how many topological islands by branch road.Analysis result is that will have electrical link
Topological node be divided into a topological island, by the connection status of current conversion station in many topological islands of analysis, and and current conversion station
The current conversion station running status preserved in model analysis is compared, so as to obtain the legal method of operation of current conversion station.This method is by one
Individual complicated catenet is decomposed into current conversion station one by one, and each current conversion station is analyzed, and then passes through these current conversion stations
Specific connection unit<Circuit) link together, so that the analysis of whole complex network is completed, can be fast by topological analysis
The fast method of operation for accurately determining the soft lineal system of multiterminal, it is ensured that soft lineal system is safely and steadily run.
The soft straight control model recognition methods of power network disclosed by the invention comprises the following steps：
Step 1：Algorithm for pattern recognition is simulated interior all equipment states to current conversion station first and analyzed, using breadth First
All devices in Multi-end flexible direct current transmission system network are scanned for inquiry, set up all devices object by searching method
Electric attribute annexation, and complete identification and the network partition of branch type.Generate original current conversion station model and multiterminal are soft
Property DC transmission system network model.Determine the initial control model of the current conversion station of each in Multi-end flexible direct current transmission system.
Step 2：The analysis influenceed according to various equipment faults on soft straight system operation mode, with reference to network topology matrix,
The method of operation operation of influence and required progress of the various failures to system is obtained, parameter information storage is carried out, for subsequent analysis
Inquiry and reference.
Step 3：Algorithm for pattern recognition timing detects the change of Multi-end flexible direct current transmission system internal segment dotted state, works as detection
After being changed to Multi-end flexible direct current transmission system internal segment dotted state, generated according to the change of network structure, and in step 2
Storage information be compared, the parameter information that selection meets condition generates the new method of operation, and update current conversion station model and
Multi-end flexible direct current transmission system network model.
Herein using node class and the bi-directional association relation of branch road class, initial network is opened up based on breadth first search
Put oneself into and gone traversal, and realize identification and the network partition of branch type simultaneously.According to various equipment faults to soft lineal system
The analysis of method of operation influence, with reference to network topology matrix, obtains the operation of influence and required progress of the various failures to system
Mode is operated, and is carried out parameter information storage and is inquired about and refer to for subsequent analysis.Pattern-recognition passes through the topological track side of quick indexing
Method carries out fast search tracking to the equipment state in soft straight grid, using the means abstract and simplified to network progress,
With reference to network failure situation, realize the topology tracking of network, to after equipment fault because network structure change is soft to multistage straight
The influence of system operation mode is judged, soft straight current conversion station control model is adjusted in time.This method can be applied to arbitrarily complicated
The soft straight distribution network of independence of structure, the need for disclosure satisfy that the soft lineal system operational management of multiterminal, for improving the soft direct line of multiterminal
The operation level of system has preferable theory significance and practical value.
Claims (1)
1. the soft straight control model recognition methods of a kind of power network, it is characterised in that the recognition methods comprises the following steps：
Step 1：The multiple spot various dimensions information of Multi-end flexible direct current transmission system network, bag are gathered by phasor measurement unit PMU
Include breaker, disconnecting link, transformer, transverter, bus and line state information and the Multi-end flexible direct current transmission system network operation
Parameter；
Step 2：The equipment with same operation characteristic is divided into same equipment group based on Object-oriented Technique；By many shapes
State device map is multinode, and the parent object of each node is this device object, by Multi-end flexible direct current transmission system network
It is connection cable node and annexation that interior equipment connection is abstract, the electric attribute of every kind of equipment it is all abstract for nodal community and
Annexation attribute, is built into current conversion station model, then constitute Multi-end flexible direct current transmission system by current conversion station model by device model
System network topology model；
Step 3：The Multi-end flexible direct current transmission system network topology model generated according to step 2, using BFS plan
Slightly the network topology model is traveled through, while completing identification and the network partition of branch type；Opened up by quick indexing
Tracking is flutterred to carry out the topological structure of the i.e. Multi-end flexible direct current transmission system of Multi-end flexible direct current transmission system network state
Real-time tracking, Multi-end flexible direct current transmission system is changed according to the change of the topological structure of Multi-end flexible direct current transmission system
The method of operation.
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| CN201710308981.XA CN106972521A (en) | 2017-05-04 | 2017-05-04 | The soft straight control model recognition methods of power network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687501A (en) * | 2018-12-30 | 2019-04-26 | 全球能源互联网研究院有限公司 | Flexible multimode power electronic equipment protection and failure restorat ion method and device |
| CN112600203A (en) * | 2020-12-16 | 2021-04-02 | 卡斯柯信号有限公司 | Power grid wiring diagram topology analysis method based on dynamic region division |
-
2017
- 2017-05-04 CN CN201710308981.XA patent/CN106972521A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687501A (en) * | 2018-12-30 | 2019-04-26 | 全球能源互联网研究院有限公司 | Flexible multimode power electronic equipment protection and failure restorat ion method and device |
| CN109687501B (en) * | 2018-12-30 | 2020-09-08 | 全球能源互联网研究院有限公司 | Flexible multi-state power electronic device protection and fault recovery method and device |
| CN112600203A (en) * | 2020-12-16 | 2021-04-02 | 卡斯柯信号有限公司 | Power grid wiring diagram topology analysis method based on dynamic region division |
| CN112600203B (en) * | 2020-12-16 | 2022-07-26 | 卡斯柯信号有限公司 | Power grid wiring diagram topology analysis method based on dynamic region division |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170721 |
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| WD01 | Invention patent application deemed withdrawn after publication |