CN106849077A - Island detection method based on electric power wireless private network - Google Patents
Island detection method based on electric power wireless private network Download PDFInfo
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- H02J13/0006—
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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
- 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
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
-
- 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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
It is each switching node configuration wireless communication data collector in distribution network line, and carry out network node configuration the invention discloses the island detection method based on electric power wireless private network；Topological structure initialization is carried out to distribution web area where photovoltaic power station, topological model is generated；Photovoltaic power station subscribes to switching-state information according to topological model to the relevant communications node in associated circuitry；Communication node on off state according to collection judges whether isolated island occurs.Using above-mentioned technical proposal, the line construction of network topology dynamic change is can adapt to；Compared with existing active detection method, the power network quality of power supply is had no effect；Compared with passive type detection method, the present invention uses wireless mode acquisition node state, in the absence of check frequency problem, judges that quick, reliability is high；Precision is high, practical.
Description
Technical field
The invention belongs to the technical field of power system security protection, it is related to the anti-isolated island of distributed new electricity generation grid-connecting
Protection technique.More particularly it relates to be based on the island detection method of electric power wireless private network.
Background technology
It is reply global environment and the dual-pressure of the energy, countries in the world are actively being readjusted the energy structure, distributed photovoltaic
Power station is developed rapidly in recent years as a kind of renewable and clean energy resource forms of electricity generation.
Islanding problem is always the research focus during distributed power source is incorporated into the power networks, islet operation can be divided into plan isolated island and
Unplanned isolated island, the running status of unplanned isolated island is accidental, and scope is uncertain, and islet operation certain hour can be to electricity
Net system, distributed power source and its power equipment cause damage.As DG (distributed generation, distributed (electricity
Source) generate electricity) in island operation state when, can because DG capacity and institute on-load are mismatched and caused by inverter end voltage, frequency
Fluctuated etc. electrical quantity.With being continuously increased for grid power source and generating capacity, problems can be highlighted more.
The detection of island state is the basis of whole islanding problem research.The island detection method commonly used at present, according to peace
Holding position can be divided into three kinds of grid side (also known as long-range method), inverter end and grid entry point；According to specific method classification be divided into again by
Dynamic detection method, active detecting method and hybrid detection method three major types.Passive detection method principle is relatively simple, additionally set without addition
It is standby, and the quality of power supply and grid stability are not influenceed, but there is larger check frequency, and the detection used time is long.Actively
Formula detection method is to detect isolated island by injecting disturbing signal to system, often produces influence, or multiple to disturb the quality of power supply
Dynamic signal source interferes and causes to judge by accident or examine not measuring island state.
The content of the invention
The present invention provides a kind of island detection method based on electric power wireless private network, and its technical problem to be solved is：Have
Effect judges island state, and effectively sends alarm when isolated island occurs.
To achieve these goals, the technical scheme taken of the present invention is：
Island detection method based on electric power wireless private network of the invention, described electric power wireless private network uses TD-LTE skills
Art；Described island detection method is applied to the distribution network line region belonging to photovoltaic power station (DG)；Described isolated island
Detection method is each switching node configuration wireless communication data collector in distribution network line, and carries out network node configuration；
Topological structure initialization is carried out to distribution web area where photovoltaic power station, topological model is generated；Photovoltaic power station
Switching-state information is subscribed to the relevant communications node in associated circuitry according to topological model；According to the communication node switch of collection
Whether condition adjudgement isolated island occurs.
The step of described island detection method is：
A. the electric power wireless private network based on TD-LTE technologies, the distribution network line belonging to covering photovoltaic power station are built
Region；
B. described distribution network line includes 35KV transformer stations, breaker and switch tool, segmentation under electric power wireless private network
Switching node and photovoltaic power station DG；And relative set 35KV power transformation tiny nodes S1, breaker and switch tool node K1
~Kn, block switch node DL；
C., power switch state acquisition device is installed on the association switching node in distribution network line, is communicated by TD-LTE
Module and the wireless telecommunications of DG ends；
D. node configuration initialization：Communication node hierarchical layered in wireless network range, each node are equipped with only
One mailing address, and a next stage node mailing address table is set simultaneously；Fig. 2 is single node schematic diagram, and K1 is by retrieval
Address table with carry out radio communication directly under downstream site K2~Kn；
E. when there is being initialized, it is necessary to re-start node configuration when increasing or decreasing for switching node physical location, more
New traffic address table；
F. network topology identification：S1 has the topological initialization command authority of initiation, and K1~Kn is successively by mailing address progression
DG ends are sent to, communication topology initialization is completed；Now, the grid-connected communicator in DG ends obtains one group of communication topology node address
S1, K1~Kn；
G. initialized according to network topology and recognized, model one is obtained when DL disconnects, closed when left side circuit sends failure DL
Model two is obtained during conjunction；
H. information subscribing and issue：The grid-connected communicator in DG ends uses hair with the communication mode of all topological nodes in model
Cloth person/subscriber's mechanism, DG ends (subscriber) sends according to the communication topology address for obtaining to relevant communications node (distribution person)
Subscribe to application；
I. island state logic judgment：DG ends obtain the communication of two groups of influence its island states and open up after communication topology initialization
Flutter model；By message subscribing, DG receives the switch state signal from two group model interior joints in real time, and to signal data
Treatment is analyzed, the island state of DG is judged；Switch closure is 1,；Switch off is 0；
X1=S1 ∩ K1 ∩ K2 ∩ K3 ∩ K4；
X2=S1 ∩ K5 ∩ K6 ∩ DL ∩ K3 ∩ K4；
Y=X1 ∩ X2；
Then judge that isolated island does not occur as Y=1, then judge that isolated island occurs as Y=0.
Described transformer station is 35KV transformer stations.
Described TD-LTE electric power wireless private networks communications band selection 230MHz or 1.8GHz.
Hierarchical definition is carried out to switching node in step D, if there is block switch, interconnection switch equipment in circuit, it is opened
Off status can cause power distribution network topological structure dynamic change, then set described block switch node, interconnection switch node rank
Put higher than with layer adjacent lines node.
Message subscribing message transmissions mechanism described in rapid H is sent Node Switch state using heartbeat message pattern in real time
To photovoltaic power station DG ends (subscriber).
The present invention uses above-mentioned technical proposal, and the mode based on telecommunication gathers line switching node state, and with
This judges whether isolated island, and alarm is sent in time if isolated island occurs, and its advantage is：Can adapt to network topology dynamic
The line construction of change；Compared with existing active detection method, the power network quality of power supply is had no effect；With passive type
Detection method is compared, and the present invention uses wireless mode acquisition node state, in the absence of check frequency problem, judges quick, reliability
It is high；Precision is high, practical.
Brief description of the drawings
Fig. 1 is power circuit structure chart of the invention；
Fig. 2 is switch single node schematic diagram；
Fig. 3 is network topology initialization flowchart；
Fig. 4 is network topology model figure；
Fig. 5 is island detection method schematic flow sheet of the invention；
Fig. 6 (a) is line status figure when failure does not occur；
Fig. 6 (b) is line status figure after breaking down.
Marked in figure：
S1-transformer substation end node, K1~K6-breaker and switch tool node, DL-block switch node, DG-point
Cloth photovoltaic plant.
Specific embodiment
Below against accompanying drawing, by the description to embodiment, further details of is made to specific embodiment of the invention
Illustrate there is more complete, accurate and deep reason to inventive concept of the invention, technical scheme to help those skilled in the art
Solution.
Structure of the invention as shown in Figure 1, is a kind of isolated island detection structure based on electric power wireless private network.
In order to overcome the defect of prior art, realization effectively judges island state, and effectively send announcement when isolated island occurs
Alert goal of the invention, the technical scheme taken of the present invention is：
As shown in Figures 1 to 6, the island detection method based on electric power wireless private network of the invention, described electric power is wireless
Private network uses TD-LTE technologies；Described island detection method is applied to the distribution network line belonging to photovoltaic power station (DG)
Region；Described island detection method is each switching node configuration wireless communication data collector in distribution network line, is gone forward side by side
Row network node is configured；Topological structure initialization is carried out to distribution web area where photovoltaic power station, topological model is generated；
Photovoltaic power station subscribes to switching-state information according to topological model to the relevant communications node in associated circuitry；According to collection
Communication node on off state judge whether isolated island occurs.
The present invention relates to a kind of island detection method based on electric power wireless private network, it is included in photovoltaic power station institute
Electric power wireless private network is built in category distribution web area；It is each switching node configuration wireless communication data collection in distribution network line
Device, and carry out network node configuration；Topological structure initialization is carried out to distribution web area where photovoltaic power station, generation is opened up
Flutter model；Photovoltaic power station (DG) is subscribed on off state and is believed according to topological model to the relevant communications node in associated circuitry
Breath；Communication node on off state according to collection judges whether isolated island occurs.
The step of described island detection method is：
A. the electric power wireless private network based on TD-LTE technologies, the distribution network line belonging to covering photovoltaic power station are built
Region；
B. described distribution network line includes 35KV transformer stations, breaker and switch tool, segmentation under electric power wireless private network
Switching node and photovoltaic power station DG；And relative set 35KV power transformation tiny nodes S1, breaker and switch tool node K1
~Kn, block switch node DL；
Fig. 1 is the line assumption diagram of one embodiment of the invention, including 35KV transformer stations S1 nodes under electric power wireless private network, disconnected
Road device and switch tool (K1~K6 nodes), block switch (node DL) and photovoltaic power station (DG).
C., power switch state acquisition device is installed on the association switching node in distribution network line, is communicated by TD-LTE
Module and the wireless telecommunications of DG ends；
D. node configuration initialization, by the communication node hierarchical layered in wireless network range, each node is equipped with only
One mailing address, and a next stage node mailing address table is set simultaneously.Fig. 2 is single node schematic diagram, and node K1 passes through
Search address table can carry out radio communication with directly under downstream site K2~Kn.
E. when there is being initialized, it is necessary to re-start node configuration when increasing or decreasing for switching node physical location, more
New traffic address table；
F. network topology identification：By taking the circuit of Fig. 1 left sides as an example, Fig. 3 is network topology initialization flowchart, transformer substation end S1
With topological initialization command authority is initiated, mailing address progression is sent to DG ends by K1~K4 successively, at the beginning of completing communication topology
Beginningization.Now, the grid-connected communicator in DG ends obtains one group of communication topology node address S1, K1~K4.
G. Fig. 4 is topological model figure, is initialized according to network topology and recognized, model one is obtained when DL disconnects, and works as left side
Circuit sends when failure DL is closed and obtains model two；
H. information subscribing and issue：The grid-connected communicator in DG ends uses hair with the communication mode of all topological nodes in model
Cloth person/subscriber's mechanism, DG ends (subscriber) sends according to the communication topology address for obtaining to relevant communications node (distribution person)
Subscribe to application；
I. island state logic judgment：DG ends obtain the communication of two groups of influence its island states and open up after communication topology initialization
Flutter model；By message subscribing, DG receives the switch state signal from two group model interior joints in real time, and to signal data
Treatment is analyzed, the island state of DG is judged；Switch closure is 1,；Switch off is 0；
X1=S1 ∩ K1 ∩ K2 ∩ K3 ∩ K4；
X2=S1 ∩ K5 ∩ K6 ∩ DL ∩ K3 ∩ K4；
Y=X1 ∩ X2；
Then judge that isolated island does not occur as Y=1, then judge that isolated island occurs as Y=0.
Described transformer station is 35KV transformer stations.
Described TD-LTE electric power wireless private networks communications band selection 230MHz or 1.8GHz.
Hierarchical definition is carried out to switching node in step D, if there is block switch, interconnection switch equipment in circuit, it is opened
Off status can cause power distribution network topological structure dynamic change, then set described block switch node, interconnection switch node rank
Put higher than with layer adjacent lines node.
Message subscribing message transmissions mechanism described in rapid H is sent Node Switch state using heartbeat message pattern in real time
To photovoltaic power station DG ends (subscriber).
The present invention is exemplarily described above in conjunction with accompanying drawing, it is clear that the present invention is implemented and do not receive aforesaid way
Limitation, as long as employing the improvement of various unsubstantialities that method of the present invention design and technical scheme are carried out, or without changing
Enter and design of the invention and technical scheme are directly applied into other occasions, within protection scope of the present invention.
Claims (6)
1. the island detection method of electric power wireless private network is based on, it is characterised in that：Described electric power wireless private network uses TD-LTE
Technology；Described island detection method is applied to the distribution network line region belonging to photovoltaic power station；Described isolated island inspection
Survey method is each switching node configuration wireless communication data collector in distribution network line, and carries out network node configuration；It is right
Distribution web area where photovoltaic power station carries out topological structure initialization, generates topological model；Photovoltaic power station root
According to topological model switching-state information is subscribed to the relevant communications node in associated circuitry；According to the communication node switch shape of collection
State judges whether isolated island occurs.
2. according to the island detection method based on electric power wireless private network described in claim 1, it is characterised in that：Described isolated island
The step of detection method is：
A. the electric power wireless private network based on TD-LTE technologies, the distribution network line area belonging to covering photovoltaic power station are built
Domain；
B. described distribution network line includes the transformer station under electric power wireless private network, breaker and switch tool, block switch section
Point and photovoltaic power station DG；And relative set power transformation tiny node S1, breaker and switch tool node K1~Kn, segmentation are opened
Artis DL；
C., power switch state acquisition device is installed, by TD-LTE communication modules on the association switching node in distribution network line
With the wireless telecommunications of DG ends；
D. node configuration initialization：Communication node hierarchical layered in wireless network range, each node are equipped with uniquely
Mailing address, and a next stage node mailing address table is set simultaneously；Fig. 2 is single node schematic diagram, and K1 passes through search address
Table with carry out radio communication directly under downstream site K2~Kn；
E. when there is being initialized, it is necessary to re-start node configuration when increasing or decreasing for switching node physical location, update logical
Letter address table；
F. network topology identification：S1 has the topological initialization command authority of initiation, and K1~Kn successively transmits mailing address progression
To DG ends, communication topology initialization is completed；Now, the grid-connected communicator in DG ends obtains one group of communication topology node address S1, K1
~Kn；
G. initialized according to network topology and recognized, model one is obtained when DL disconnects, when left side circuit sends failure DL to be closed
Obtain model two；
H. information subscribing and issue：The grid-connected communicator in DG ends uses issue with the communication mode of all topological nodes in model
Person/subscriber's mechanism, DG ends are subscriber, are sent to relevant communications node i.e. distribution person according to the communication topology address for obtaining and ordered
Read application；
I. island state logic judgment：DG ends obtain two groups of communication topology moulds of influence its island state after communication topology initialization
Type；By message subscribing, DG receives the switch state signal from two group model interior joints in real time, and signal data is carried out
Analyzing and processing, judges the island state of DG；Switch closure is 1,；Switch off is 0；
X1=S1 ∩ K1 ∩ K2 ∩ K3 ∩ K4；
X2=S1 ∩ K5 ∩ K6 ∩ DL ∩ K3 ∩ K4；
Y=X1 ∩ X2；
Then judge that isolated island does not occur as Y=1, then judge that isolated island occurs as Y=0.
3. according to the island detection method based on electric power wireless private network described in claim 2, it is characterised in that：Described power transformation
It is 35KV transformer stations to stand.
4. according to the island detection method based on electric power wireless private network described in claim 2, it is characterised in that：Described TD-
LTE electric power wireless private networks communications band selects 230MHz or 1.8GHz.
5. according to the island detection method based on electric power wireless private network described in claim 2, it is characterised in that right in step D
Switching node carries out hierarchical definition, if there is block switch, interconnection switch equipment in circuit, its on off state can cause power distribution network
Topological structure dynamic change, then it is higher than with layer adjacent lines to set described block switch node, interconnection switch node rank
Node.
6. according to the island detection method based on electric power wireless private network described in claim 2, it is characterised in that institute in step H
Node Switch state is sent to distributed photovoltaic electricity by the message subscribing message transmissions mechanism stated in real time using heartbeat message pattern
Stand DG ends.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401566A (en) * | 2019-07-24 | 2019-11-01 | 国电南瑞南京控制系统有限公司 | A kind of power distribution network node state real-time delivery method |
| CN112650891A (en) * | 2020-12-30 | 2021-04-13 | 广西大学 | Method capable of rapidly detecting and preventing distributed power supply island effect generation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545919A (en) * | 2013-09-05 | 2014-01-29 | 昆明理工大学 | Island topology recognition method for active power distribution network |
| CN105098762A (en) * | 2014-05-09 | 2015-11-25 | 国家电网公司 | Island dividing method for power distribution network having distributed power sources |
| CN107064678A (en) * | 2017-04-06 | 2017-08-18 | 国网安徽省电力公司芜湖供电公司 | A kind of island detection method based on electric power wireless private network |
-
2017
- 2017-04-18 CN CN201710251857.4A patent/CN106849077A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545919A (en) * | 2013-09-05 | 2014-01-29 | 昆明理工大学 | Island topology recognition method for active power distribution network |
| CN105098762A (en) * | 2014-05-09 | 2015-11-25 | 国家电网公司 | Island dividing method for power distribution network having distributed power sources |
| CN107064678A (en) * | 2017-04-06 | 2017-08-18 | 国网安徽省电力公司芜湖供电公司 | A kind of island detection method based on electric power wireless private network |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401566A (en) * | 2019-07-24 | 2019-11-01 | 国电南瑞南京控制系统有限公司 | A kind of power distribution network node state real-time delivery method |
| CN110401566B (en) * | 2019-07-24 | 2022-03-29 | 国电南瑞南京控制系统有限公司 | Method for transmitting node state of power distribution network in real time |
| CN112650891A (en) * | 2020-12-30 | 2021-04-13 | 广西大学 | Method capable of rapidly detecting and preventing distributed power supply island effect generation |
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Application publication date: 20170613 |
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