CN104779641B - The island detection method of the distributed energy of automated security control system - Google Patents
The island detection method of the distributed energy of automated security control system Download PDFInfo
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- CN104779641B CN104779641B CN201510179773.5A CN201510179773A CN104779641B CN 104779641 B CN104779641 B CN 104779641B CN 201510179773 A CN201510179773 A CN 201510179773A CN 104779641 B CN104779641 B CN 104779641B
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- frequency
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- frequency difference
- net side
- electrical source
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
Abstract
The present invention relates to a kind of island detection method of the distributed energy of automated security control system, it includes：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 judges island phenomenon occurs more than a set action value；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 judge island phenomenon occurs.
Description
The application is Application No.：201210516878.1 invention and created name is《The distribution of automated security control system
The isolated island detection of the formula energy, control method》, the applying date is：The divisional application of the application for a patent for invention on December 05th, 2012.
Technical field
The present invention relates to technical field of electric power, the distribution of more particularly to a kind of automated security control system based on 3G network
The isolated island detection of the formula energy, control method.
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
Distributed energy island detection method.
In order to solve the above technical problems, the isolated island inspection of the distributed energy of the automated security control system of the offer of the present invention
Survey method, comprises the following steps：
When being installed in the control terminal-pair of the distributed electrical source distributed power source and synchronize measurement frequency, and stamping
Synchro measure frequency data are sent to public power net side by mark by 3G network；
The control terminal-pair utility network for being installed in public power net side synchronizes measurement frequency, and stamps markers, simultaneously
Receive the synchro measure frequency data sent on distributed electrical source；
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 judge island phenomenon occurs；If
The frequency difference is beyond a setting initiation value（Generally 0.1Hz, setting initiation value requirement are more than terminal acquisition precision）, but do not surpass
The set action value is crossed, then using equation below（1）Calculate frequency difference energy product score value Kdf：
…（1）
In formula, Df：Public network side and the frequency difference of distributed electrical source；
If KdfMore than a frequency difference energy integral setting value, then judge island phenomenon occurs.
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 network side and distributed electrical source difference on the frequency are calculated for public network lateral terminal；Fsys：For public network lateral terminal
Calculate public network frequency；Fdg：Distributed electrical source frequency；Fset1：Set action value, the given delays of Tset1；Kdf：Frequency difference energy
Integrated 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 isolated island detection of the distributed energy of the automated security control system of the present embodiment, control method, including following step
Suddenly：
When being installed in the control terminal-pair of the distributed electrical source distributed power source and synchronize measurement frequency, and stamping
Synchro measure frequency data are sent to public power net side by mark by 3G network；
The control terminal-pair utility network for being installed in public power net side synchronizes measurement frequency, and stamps markers, simultaneously
Receive the synchro measure frequency data sent on distributed electrical source；
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：Public network side and the frequency difference of 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 public power net side is received, tripping is grid-connected
Breaker, eliminate island operation state.
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. island detection method of the distributed energy of automated security control system, it is characterised in that including：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 the control terminal of 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 judges island phenomenon occurs more than a set action value；If the frequency difference sets initiation value beyond one, but not More 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 judge island phenomenon occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510179773.5A CN104779641B (en) | 2012-12-05 | 2012-12-05 | The island detection method of the distributed energy of automated security control system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210516878.1A CN103036250B (en) | 2012-12-05 | 2012-12-05 | Island detection and control method of distributed energy resource of safety automatic control system |
| CN201510179773.5A CN104779641B (en) | 2012-12-05 | 2012-12-05 | The island detection method of the distributed energy of automated security control system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201210516878.1A Division CN103036250B (en) | 2012-12-05 | 2012-12-05 | Island detection and control method of distributed energy resource of safety automatic control system |
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| CN104779641A CN104779641A (en) | 2015-07-15 |
| CN104779641B true CN104779641B (en) | 2017-11-21 |
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| CN201510178932.XA Active CN104764960B (en) | 2012-12-05 | 2012-12-05 | A kind of isolated island detection of distributed energy, control method |
| CN201510179630.4A Active CN104764961B (en) | 2012-12-05 | 2012-12-05 | A kind of island detection method of the distributed energy of automated security control system |
| CN201510179773.5A Active CN104779641B (en) | 2012-12-05 | 2012-12-05 | The island detection method of the distributed energy of automated security control system |
| CN201210516878.1A Active CN103036250B (en) | 2012-12-05 | 2012-12-05 | Island detection and control method of distributed energy resource of safety automatic control system |
| CN201510179759.5A Active CN104764962B (en) | 2012-12-05 | 2012-12-05 | The isolated island detection of distributed energy, control method |
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| CN201510179630.4A Active CN104764961B (en) | 2012-12-05 | 2012-12-05 | A kind of island detection method of the distributed energy of automated security control system |
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| CN201510179759.5A Active CN104764962B (en) | 2012-12-05 | 2012-12-05 | The isolated island detection of distributed energy, control method |
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| CN104764960B (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 isolated island detection of distributed energy, control method |
| 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 |
| CN103944160B (en) * | 2014-04-09 | 2015-10-07 | 国家电网公司 | A kind of distribution network protection based on distributed power generation characteristic and automatics fitting method |
| CN105372529B (en) * | 2015-11-24 | 2019-03-19 | 国网甘肃省电力公司 | For the power grid isolated island detection of large-scale wind power and anti-isolated island guard method |
| CN105391033B (en) * | 2015-11-24 | 2018-06-26 | 国网甘肃省电力公司 | Layering for large-scale wind power generation divides domain anti-isolated island guard method |
| CN106684844B (en) * | 2017-02-21 | 2018-12-04 | 国网山东省电力公司电力科学研究院 | A kind of power distribution network isolated island recognition methods |
| CN111769560B (en) * | 2020-07-17 | 2022-01-25 | 国家电网公司西南分部 | Emergency drop risk control method for power system with photovoltaic power generation |
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| US7106564B2 (en) * | 2002-01-16 | 2006-09-12 | Ballard Power Systems Corporation | Devices and methods for detecting islanding operation of a static power source |
| JP4085843B2 (en) * | 2003-03-03 | 2008-05-14 | 株式会社大林組 | Power supply system and method of operating power supply system |
| KR101015802B1 (en) * | 2008-08-27 | 2011-02-18 | 창원대학교 산학협력단 | Single Phase Photovoltaic Power Generation System For Anti-islanding Driver |
| CN201438201U (en) * | 2009-04-03 | 2010-04-14 | 江苏省电力公司苏州供电公司 | Secondary loop circuit voltage drop synchronous detection device for voltage mutual inductor |
| CN101794988B (en) * | 2010-03-30 | 2012-07-04 | 华中科技大学 | Method for detecting piconet island state |
| CN101834431A (en) * | 2010-05-21 | 2010-09-15 | 深圳市科陆电子科技股份有限公司 | Method for preventing grid-connected island effect of distributed power source |
| CN102157961A (en) * | 2011-03-02 | 2011-08-17 | 云南电力试验研究院(集团)有限公司 | Micro-net control device |
| CN202042911U (en) * | 2011-03-02 | 2011-11-16 | 云南电力试验研究院(集团)有限公司 | Micro grid control device |
| CN102694381B (en) * | 2011-03-25 | 2014-07-23 | 珠海优特电力科技股份有限公司 | Multistage electrical-network self-healing control method |
| CN102255330A (en) * | 2011-04-19 | 2011-11-23 | 河南电力试验研究院 | Device and method for detecting island of micro power grid system |
| CN102270844B (en) * | 2011-07-27 | 2013-07-31 | 西藏电力有限公司 | Novel low-frequency unloading setting method aiming at isolated power grid |
| CN102684175B (en) * | 2012-06-05 | 2015-11-18 | 国家电网公司 | A kind of implementation method of micro-capacitance sensor protection |
| CN202940577U (en) * | 2012-12-05 | 2013-05-15 | 江苏省电力公司常州供电公司 | Safe automatic control system for islanding detection of distributed energy |
| CN105305629B (en) * | 2012-12-05 | 2017-11-21 | 江苏省电力公司常州供电公司 | Method of work for the Automatic safety control system for island detection of distributed energy |
| CN104764960B (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 isolated island detection of distributed energy, control method |
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- 2012-12-05 CN CN201510179630.4A patent/CN104764961B/en active Active
- 2012-12-05 CN CN201510179773.5A patent/CN104779641B/en active Active
- 2012-12-05 CN CN201210516878.1A patent/CN103036250B/en active Active
- 2012-12-05 CN CN201510179759.5A patent/CN104764962B/en active Active
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| Publication number | Publication date |
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| CN103036250A (en) | 2013-04-10 |
| WO2014086147A1 (en) | 2014-06-12 |
| CN103036250B (en) | 2015-05-13 |
| CN104764960A (en) | 2015-07-08 |
| CN104764962B (en) | 2017-11-21 |
| CN104764961A (en) | 2015-07-08 |
| CN104764961B (en) | 2017-11-21 |
| CN104779641A (en) | 2015-07-15 |
| CN104764960B (en) | 2017-11-21 |
| CN104764962A (en) | 2015-07-08 |
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Address after: 213003 No. 27, West Front Street, Changzhou, Jiangsu Applicant after: STATE GRID CHANG ZHOU CURRENT SUPPLY COMPANY OF JIANGSU ELECTRIC POWER Co. Applicant after: STATE GRID JIANGSU ELECTRIC POWER Co. Applicant after: State Grid Corporation of China Address before: 213003 Jiangsu province Changzhou City Tianning District Bureau Street No. 27 Applicant before: CHANG ZHOU CURRENT SUPPLY COMPANY OF JIANGSU ELECTRIC POWER Co. Applicant before: JIANGSU ELECTRIC POWER Co. Applicant before: State Grid Corporation of China |
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Address after: No. 27, front street, Changzhou Municipal Bureau, Jiangsu Province, Jiangsu Co-patentee after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. Patentee after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. CHANGZHOU POWER SUPPLY BRANCH Co-patentee after: State Grid Corporation of China Address before: No. 27, front street, Changzhou Municipal Bureau, Jiangsu Province, Jiangsu Co-patentee before: STATE GRID JIANGSU ELECTRIC POWER Co. Patentee before: STATE GRID CHANG ZHOU CURRENT SUPPLY COMPANY OF JIANGSU ELECTRIC POWER Co. Co-patentee before: State Grid Corporation of China |
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Effective date of registration: 20181211 Address after: 210024 No. 215 Shanghai Road, Nanjing City, Jiangsu Province Co-patentee after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. CHANGZHOU POWER SUPPLY BRANCH Patentee after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. Co-patentee after: State Grid Corporation of China Address before: No. 27, front street, Changzhou Municipal Bureau, Jiangsu Province, Jiangsu Co-patentee before: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. Patentee before: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. CHANGZHOU POWER SUPPLY BRANCH Co-patentee before: State Grid Corporation of China |