CN105305629B - Method of work for the Automatic safety control system for island detection of distributed energy - Google Patents
Method of work for the Automatic safety control system for island detection of distributed energy Download PDFInfo
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- CN105305629B CN105305629B CN201510719147.0A CN201510719147A CN105305629B CN 105305629 B CN105305629 B CN 105305629B CN 201510719147 A CN201510719147 A CN 201510719147A CN 105305629 B CN105305629 B CN 105305629B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 title claims abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 230000000977 initiatory effect Effects 0.000 claims abstract description 10
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- 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
- H02J3/40—Synchronising a generator for connection to a network or to another generator
-
- 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
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention relates to a kind of method of work of the Automatic safety control system for island detection for distributed energy：It is installed in the control terminal-pair of the distributed electrical source distributed power source and synchronizes measurement frequency, and stamp markers, synchro measure frequency data is sent to public power net side by 3G network；The control terminal-pair utility network for being installed in public power net side synchronizes measurement frequency, and stamps markers, while receives the synchro measure frequency data sent on distributed electrical source；The control terminal of public power net side is installed according to markers, public power net side and the frequency difference of distributed electrical source are calculated, if the frequency difference sends trip signal after 150 millisecond time-delay more than a set action value to distributed electrical source；If the frequency difference not less than the set action value, then calculates frequency difference energy product score value K beyond a setting initiation valuedf；If KdfMore than a frequency difference energy integral setting value, then trip signal is sent to distributed electrical source.
Description
The application is Application No.：201210515888.3 invention and created name is《Isolated island for distributed energy is examined
The automated security control system of survey》, the applying date is：The divisional application of the application for a patent for invention on December 5th, 2012.
Technical field
The present invention relates to technical field of electric power, more particularly to a kind of isolated island for distributed energy based on 3G network is examined
The automated security control system of survey.
Background technology
So-called island phenomenon, refers in distributed generation system, when power network power supply is jumped because of failure accident or power failure maintenance
After lock, the distributed grid-connected electricity generation system of each user terminal fails to detect power down mode in time so as to which itself is cut off into utility grid
Network, ultimately form the isolated island generating system for a self-energizing being made up of distributed power station grid-connected system and its connected load
System.The generation of island effect can bring serious potential safety hazard to system equipment and related personnel, including：（1）Island effect makes
Voltage and frequency are out of hand, and larger fluctuation will occur for the voltage and frequency in islanded system, so as to power network and user
Equipment causes to damage；（2）When islanded system is accessed power network again, distributed power generation unit during due to reclosing in system can
Can be asynchronous with power network and release unit is damaged, and there may be very high dash current, so as to damage isolated island
Distributed power generation unit in system, even result in power network and trip again；（3）Island effect may cause failure to remove,
So as to cause the infringement of grid equipment, and the automatic or manual of power network normal power supply system is disturbed to recover；（4）Island effect makes
Obtaining some is considered as powered with the circuit of all power supplys disconnection, and this can bring the danger of electric shock to related personnel.Therefore exist
In distributed generation system, if in public power net side quick obtaining isolated island information and emergent control can be carried out, it can avoid
Personnel and equipment breakdown occur.
The isolated island protection of distributed generation system has two kinds, based on the local electrical quantities collected by monitoring grid-connecting apparatus
With the anti-islanding protection based on communication.Isolated island protection based on communication is divided into the protection of intertripping isolated island and the protection of carrier wave isolated island
Deng.Traditional intertripping isolated island protection wiring is complicated, it is necessary to connect substantial amounts of control cable.Isolated island based on local measurement is protected
Shield is protected comprising passive type and active alone island, and the protection of passive type isolated island is there is check frequency, and active alone island protection needs
Disturbing signal is added to system, and can only be installed in distributed electrical source.
The content of the invention
The technical problem to be solved in the present invention is to propose a kind of automated security control system suitable for anti-isolated island defencive function.
In order to solve the above technical problems, the automated security control system of the offer of the present invention, including：
The control terminal of distributed electrical source is installed in, for synchronizing measurement frequency to the distributed power source, and is beaten
Upper markers, synchro measure frequency data are sent to public power net side by 3G network；
The control terminal of public power net side is installed in, for synchronizing measurement frequency to utility network, and stamps markers,
Receive the synchro measure frequency data sent on distributed electrical source simultaneously；
The control terminal of public power net side is installed according to markers, calculates the frequency of public power net side and distributed electrical source
Difference, if the frequency difference is more than a set action value（The set action value is generally ± 0.5Hz, and concrete numerical value refers to national grid
Incorporated business standard Q/GDW617-2011：Photovoltaic plant access electric power network technique regulation）, by given delay（Generally less than
160 milliseconds）Backward distributed electrical source sends trip signal；If the frequency difference is beyond a setting initiation value（Generally
0.1Hz, setting initiation value requirement are more than terminal acquisition precision）, but not less than the set action value, then using equation below
（1）Calculate frequency difference energy product score value Kdf：
…（1）
In formula, Df：The frequency difference of public power net side and distributed electrical source；
If KdfMore than a frequency difference energy integral setting value, then trip signal is sent to distributed electrical source.
The control terminal of distributed electrical source is installed in, in the trip signal for the control terminal for receiving public power net side
Afterwards, the grid-connected breaker of tripping, island operation state is eliminated.
The method of work of the automated security control system, including：
The control terminal of distributed electrical source is installed in, for synchronizing measurement frequency to the distributed power source, and is beaten
Upper markers, synchro measure frequency data are sent to public power net side by 3G network；
The control terminal of public power net side is installed in, for synchronizing measurement frequency to utility network, and stamps markers,
Receive the synchro measure frequency data sent on distributed electrical source simultaneously；
The control terminal of public power net side is installed according to markers, calculates the frequency of public power net side and distributed electrical source
Difference, if the frequency difference is more than a set action value（The set action value is generally ± 0.5Hz, and concrete numerical value refers to national grid
Incorporated business standard Q/GDW617-2011：Photovoltaic plant access electric power network technique regulation）, then to distribution after 150 millisecond time-delay
Formula mains side sends trip signal；If the frequency difference is beyond a setting initiation value（Generally 0.1Hz, the setting initiation value will
Ask and be more than terminal acquisition precision）, but not less than the set action value, then using equation below（1）Calculate frequency difference energy integral
Value Kdf：
…（1）
In formula, Df：The frequency difference of public power net side and distributed electrical source；
If KdfMore than a frequency difference energy integral setting value, then trip signal is sent to distributed electrical source.
The control terminal of distributed electrical source is installed in, in the trip signal for the control terminal for receiving public power net side
Afterwards, the grid-connected breaker of tripping, island operation state is eliminated.
Relative to prior art, technique effect that the solution of the present invention has：（1）The present invention is by gathering public power net side
Frequency and distributed electrical source frequency, method is simple and reliable, and the mode of connection is simple, is easy to engineering construction, realizes from grid-connected
Detection of the breaker to isolated island in the range of utility network side bus.When frequency difference exceeds setting initiation value, not less than set action value
When, differentiated using frequency difference method of energy integral, be effectively reduced check frequency, effectively ensured the isolated island inspection of distributed energy
Survey rate, isolated island detection range is expanded, improves safe operation of electric network.（2）The isolated island for distributed energy of the present invention
Detecting system includes：Synchro measure and control terminal based on 3G network of distributed electrical source, transformer substation side.Transformer substation side
Terminal and the terminal of distributed electrical source beat is unified by global clock synchronization system, carry out strange land high-speed synchronous sampling, adopt
Current collection air volume calculation frequency, the frequency data with absolute time mark are formed, distributed electrical source is by the dynamic frequency with absolute time mark
Data are sent to transformer substation side terminal by 3G wireless networks.Transformer station's terminal is according to distributed electrical source and transformer substation side frequency
Data, distributed power source running status is differentiated using frequency difference energy integral principle, by 3G network to distributed electrical source side termination
The corresponding command is sent, solves the grid-connected derivative islanding problem of distributed power source.
Brief description of the drawings
Fig. 1 is the isolated island testing process schematic diagram of the embodiment of the present invention；
In figure：Df：Public power net side and distributed electrical source difference on the frequency are calculated for utility network lateral terminal；Fsys：For public affairs
Public network frequency is calculated with grid side terminal；Fdg：Distributed electrical source frequency；Fset1：Set action value, the given delays of Tset1；
Kdf：Frequency difference energy product score value, Kset2 frequency difference energy set-points；
Fig. 2 is the distributed power source access system automated security control system and its terminal device layout drawing of the present invention.
Embodiment
The automated security control system of the present embodiment, including：
The control terminal of distributed electrical source is installed in, for synchronizing measurement frequency to the distributed power source, and is beaten
Upper markers, synchro measure frequency data are sent to public power net side by 3G network；
The control terminal of public power net side is installed in, for synchronizing measurement frequency to utility network, and stamps markers,
Receive the synchro measure frequency data sent on distributed electrical source simultaneously；
The control terminal of public power net side is installed according to markers, calculates the frequency of public power net side and distributed electrical source
Difference, if the frequency difference is more than a set action value（The set action value is generally ± 0.5Hz, and concrete numerical value reference may also be made to country
Grid company company standard Q/GDW617-2011：Photovoltaic plant access electric power network technique regulation）, by given delay（Typically
Less than 160 milliseconds）Backward distributed electrical source sends trip signal；If the frequency difference is beyond a setting initiation value（Generally
0.1Hz, setting initiation value requirement are more than terminal acquisition precision）, but not less than the set action value, then using equation below
（1）Calculate frequency difference energy product score value Kdf：
…（1）
In formula, Df：The frequency difference of public power net side and distributed electrical source；
If KdfMore than a frequency difference energy integral setting value, then trip signal is sent to distributed electrical source.
The control terminal of distributed electrical source is installed in, in the trip signal for the control terminal for receiving public power net side
Afterwards, the grid-connected breaker of tripping, island operation state is eliminated.
When frequency difference beyond setting initiation value, not less than set action value when, using frequency difference method of energy integral differentiate, effectively
Reduce check frequency, effectively ensured the isolated island verification and measurement ratio of distributed energy, expanded isolated island detection range, improve electricity
Network operation security.
The terminal of transformer substation side and the terminal of distributed electrical source unify beat by global clock synchronization system, carry out strange land
High-speed synchronous samples, and collection electrical quantity calculates frequency, forms the frequency data with absolute time mark, and distributed electrical source will be with absolute
When target dynamic frequency data transformer substation side terminal is sent to by 3G wireless networks.Transformer station's terminal is according to distributed electrical source
With transformer substation side frequency data, distributed power source running status is differentiated using frequency difference energy integral principle, by 3G network to dividing
Cloth power source side terminal sends the corresponding command, solves the grid-connected derivative islanding problem of distributed power source.
Claims (1)
- A kind of 1. method of work of Automatic safety control system for island detection for distributed energy, it is characterised in that bag Include：It is installed in the control terminal-pair of the distributed electrical source distributed power source and synchronizes measurement frequency, and stamps markers, will Synchro measure frequency data are sent to public power net side by 3G network；The control terminal-pair utility network for being installed in public power net side synchronizes measurement frequency, and stamps markers, receives simultaneously The synchro measure frequency data sent on distributed electrical source；The control terminal of public power net side is installed according to markers, calculates public power net side and the frequency difference of distributed electrical source, such as The fruit frequency difference then sends trip signal after 150 millisecond time-delay more than a set action value to distributed electrical source；It is if described Frequency difference sets initiation value beyond one, but not less than the set action value, then using equation below（1）Calculate frequency difference energy integral Value Kdf：…（1）In formula, Df：The frequency difference of public power net side and distributed electrical source；If KdfMore than a frequency difference energy integral setting value, then trip signal is sent to distributed electrical source；The control terminal of distributed electrical source is installed in, after the trip signal of control terminal of public power net side is received, is jumped Grid-connected breaker is opened, eliminates island operation state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510719147.0A CN105305629B (en) | 2012-12-05 | 2012-12-05 | Method of work for the Automatic safety control system for island detection of distributed energy |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210515888.3A CN102969794B (en) | 2012-12-05 | 2012-12-05 | For the automated security control system of the islanding detect of distributed energy |
| CN201510719147.0A CN105305629B (en) | 2012-12-05 | 2012-12-05 | Method of work for the Automatic safety control system for island detection of distributed energy |
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| CN201210515888.3A Division CN102969794B (en) | 2012-12-05 | 2012-12-05 | For the automated security control system of the islanding detect of distributed energy |
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| CN105305629A CN105305629A (en) | 2016-02-03 |
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| CN201510719197.9A Active CN105375531B (en) | 2012-12-05 | 2012-12-05 | Method of work for Automatic safety control system for island detection |
| CN201510719732.0A Active CN105305630B (en) | 2012-12-05 | 2012-12-05 | One kind is used for Automatic safety control system for island detection |
| CN201510719147.0A Active CN105305629B (en) | 2012-12-05 | 2012-12-05 | Method of work for the Automatic safety control system for island detection of distributed energy |
| CN201510716859.7A Active CN105281437B (en) | 2012-12-05 | 2012-12-05 | For Automatic safety control system for island detection |
| CN201510719486.9A Active CN105245008B (en) | 2012-12-05 | 2012-12-05 | A kind of Automatic safety control system for island detection for distributed energy |
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| CN201510719197.9A Active CN105375531B (en) | 2012-12-05 | 2012-12-05 | Method of work for Automatic safety control system for island detection |
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Families Citing this family (5)
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| CN104764961B (en) * | 2012-12-05 | 2017-11-21 | 国网江苏省电力公司常州供电公司 | A kind of island detection method of the distributed energy of automated security control system |
| CN103296643B (en) * | 2013-03-19 | 2017-02-22 | 昆明理工大学 | Comparative isolated island detection and protection method based on wide range information phase difference |
| US9520819B2 (en) | 2014-02-28 | 2016-12-13 | General Electric Company | System and method for controlling a power generation system based on a detected islanding event |
| CN105262067B (en) * | 2015-10-08 | 2018-02-02 | 南京南瑞继保电气有限公司 | A kind of anti-isolated island protection system and method |
| CN106443501B (en) * | 2016-10-27 | 2017-10-20 | 广东电网有限责任公司茂名供电局 | Distributed generator islanding detection method and system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105281437A (en) | 2016-01-27 |
| CN105305630B (en) | 2017-11-21 |
| CN105245008B (en) | 2017-11-21 |
| CN102969794B (en) | 2015-11-18 |
| CN102969794A (en) | 2013-03-13 |
| CN105281437B (en) | 2017-11-21 |
| CN105375531A (en) | 2016-03-02 |
| CN105305629A (en) | 2016-02-03 |
| CN105305630A (en) | 2016-02-03 |
| CN105245008A (en) | 2016-01-13 |
| CN105375531B (en) | 2017-11-21 |
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Inventor after: Wang Yiping Inventor after: Yan Yizhen Inventor after: Liu Shaodong Inventor after: Cao Liang Inventor before: Cao Liang |
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Address after: 213003 No. 27, West Front Street, Changzhou, Jiangsu Co-patentee after: STATE GRID JIANGSU ELECTRIC POWER COMPANY Patentee after: State Grid Jiangsu Electric Power Company, Changzhou Power Supply Company Co-patentee after: State Grid Corporation of China Address before: 213003 Jiangsu province Changzhou City Tianning District Bureau Street No. 27 Co-patentee before: Jiangsu Electric Power Company Patentee before: Changzhou Power Supply Co, Jiangsu Provincial Power Corp. Co-patentee before: State Grid Corporation of China |
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