CN203312781U - Integrated anti-islanding protection system for distributed power generation - Google Patents
Integrated anti-islanding protection system for distributed power generation Download PDFInfo
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- CN203312781U CN203312781U CN2013203002391U CN201320300239U CN203312781U CN 203312781 U CN203312781 U CN 203312781U CN 2013203002391 U CN2013203002391 U CN 2013203002391U CN 201320300239 U CN201320300239 U CN 201320300239U CN 203312781 U CN203312781 U CN 203312781U
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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Abstract
The utility model provides an integrated anti-islanding protection system for distributed power generation. An island detection device of the system is connected with a substation switch detection device and a distributed power grid-connection point control device through communication devices. The substation switch detection device is connected with a substation of a distributed power generation system. The distributed power grid-connection point control device is connected with a distributed power grid-connection point. Compared with the prior art, the anti-islanding protection system provided by the utility model can carry out local and remote island detection, and has the advantages of no detection blind area, reliable performance, wide application range and independence of the type of the distributed power source, thereby ensuring the normal operation of the power grid.
Description
Technical field
The utility model relates to a kind of anti-island protect system, specifically relates to a kind of distributed power generation Comprehensive Preventing island protect system.
Background technology
In recent years, the pressure that brings for reply energy crisis and energy-saving and emission-reduction of China had accelerated to advance the development of generation of electricity by new energy.In the development of generation of electricity by new energy, solar power generation, wind power generation, the generating of biomass power generation distributed have obtained swift and violent development; A large amount of distributed power source access power distribution networks, not only effectively improved the reliability of power distribution network, the quality of power supply of block supply, reduced simultaneously network loss, remarkable in economical benefits.Yet being incorporated into the power networks of distributed power generation also brought some new problems, and wherein the most serious problem is exactly the island effect of distributed power source; So-called isolated island refers to that electrical network is because of after network failure or the maintenance that has a power failure trip, the distributed power supply system of user side (Distributed Generation, DG) fail to detect power down mode in time and will self cut off main system, forming the isolated island of the self-energizing formed by DG system and load on every side.Island effect may cause adverse influence to the equipment of whole power distribution system equipment and user side, and the harm of island effect comprises:
1.: harm power equipment maintaining personnel's life security;
2.: affect the protection switch operation program on distribution system;
3.: the unstable character of the supply power voltage that the isolated island zone occurs and frequency can be brought destruction to power consumption equipment;
4.: the voltage-phase caused when service restoration is asynchronous will produce surge current, may cause tripping operation again or photovoltaic system, load and electric power system are brought to damage;
6.: grid-connected photovoltaic system is owed the phase powerup issue because of what single phase power supply caused the system threephase load.
The distributed power generation grid-connected system, the harm that must detect island effect and avoid it to bring in time, reliably; Therefore provide a kind of realization without isolated island detect blind area, the distributed power generation Comprehensive Preventing island protect system accurately and reliably that detects seems particularly important.
Summary of the invention
In order to meet the needs of prior art, the utility model provides a kind of distributed power generation Comprehensive Preventing island protect system, and described system comprises isolated island detecting device; Described isolated island detecting device is connected with distributed power source site measure and control device with the transformer substation switch checkout gear respectively by communicator; Described transformer substation switch checkout gear is connected with distributed generation system transformer station; Described distributed power source site measure and control device are connected with distributed power source site.
Preferably, described isolated island detecting device comprises data acquisition module, CPU module, I/O module and communication module; Described data acquisition module is connected with the distributed generation system points of common connection, be used to gathering three-phase voltage signal, three-phase current signal, frequency signal and the switch position signal of distributed generation system at the points of common connection place;
Preferably, described CPU module comprises central processing unit, static memory and dsp chip; Described dsp chip carries out the logic judgement to described three-phase voltage signal, described three-phase current signal, described frequency signal and described switch position signal, and sends distributed power source site switch closure or open command to described distributed power source site measure and control device;
Preferably, described communicator is the carrier terminal equipment be comprised of signal generator and signal receiver;
Preferably, the described signal generator of the communicator between described isolated island detecting device and described transformer substation switch checkout gear is installed in described distributed generation system transformer station; The described signal receiver of described communicator is installed on distributed generation system points of common connection place;
The described signal generator of the communicator between described isolated island detecting device and described power grid point measure and control device is installed on described distributed generation system points of common connection place; The described signal receiver of described communicator is installed on described distributed power source place, site;
Preferably, described transformer substation switch checkout gear is by the switch position signal in the described distributed generation system of hard contact collection transformer station; Described switch position signal comprises transformer station's high voltage side lead-in switch position signal, main transformer high side switch position signalling, main transformer low-side switch position signalling, bus-tie circuit breaker position signalling, feeder switch position signalling and low-pressure side bus block switch position signalling;
Preferably, described distributed power source site measure and control device comprise power insert, exchange and input plug-in unit, central authorities' processing plug-in unit, I/O plug-in unit; Described distributed power source site measure and control device are for measuring voltage, electric current, frequency and the switch position signal of distributed power source site, and the closed and disconnected of control distributed power source site switch.
The beneficial effects of the utility model are:
1, in technical solutions of the utility model, adopt carrier terminal equipment to communicate connection, save telecommunication cable cost and communication efficiency and be not subjected to landform and environmental limit;
2, in technical solutions of the utility model, isolated island detecting device not only can gather voltage, electric current, frequency and the switch position signal of distributed generation system points of common connection, can also receive the switch position signal in distributed generation system transformer station, make described anti-island protect system can realize that the local and remote mode combined carries out comprehensive isolated island detection, without detecting blind area, dependable performance;
3, a kind of distributed power generation Comprehensive Preventing island protect system of providing of the utility model, can carry out the isolated island detection to the inverter of single or multiple distributed power sources, and irrelevant with the type of distributed power source, guarantees the normal operation of electrical network;
4, a kind of distributed power generation Comprehensive Preventing island protect system of providing of the utility model, can tackle the various dead electricity situations of electrical network, applied range, safe and reliable.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 shows the structural representation of a kind of distributed power generation Comprehensive Preventing island protect system that the utility model provides;
Fig. 2 shows the isolated island detecting device structural representation;
Fig. 3 shows the structure connection layout of a kind of distributed power generation Comprehensive Preventing island protect system that the utility model provides;
Fig. 4 shows the logic judgement schematic diagram of isolated island detecting device.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described.
Fig. 1 shows the structural representation of a kind of distributed power generation Comprehensive Preventing island protect system that the utility model provides.Transformer substation switch checkout gear, communicator, isolated island detecting device, communicator and distributed power source site measure and control device are connected between distributed generation system transformer station and distributed power source site successively; Isolated island detecting device is arranged on distributed generation system points of common connection place (Point of Common Coupling, PCC); The signal generator of the communicator between isolated island detecting device and transformer substation switch checkout gear is installed in described distributed generation system transformer station; The signal receiver of described communicator is installed on distributed generation system points of common connection place (Point of Common Coupling, PCC); The signal generator of the communicator between isolated island detecting device and described power grid point measure and control device is installed on distributed generation system points of common connection place; The signal receiver of described communicator is installed on described distributed power source place, site;
The transformer substation switch checkout gear gathers the switch position signal in distributed generation system transformer station by hard contact; Described switch position signal comprises transformer station's high voltage side lead-in switch position signal, main transformer high side switch position signalling, main transformer low-side switch position signalling, bus-tie circuit breaker position signalling and feeder switch position signalling;
Fig. 2 shows the structural representation of described isolated island detecting device.Described isolated island detecting device comprises data acquisition module, CPU module, I/O module and communication module; Data acquisition module is connected with the distributed generation system points of common connection, gathers three-phase voltage signal, three-phase current signal, frequency signal and the switch position signal of distributed generation system at the points of common connection place; The CPU module comprises central processing unit, static memory and dsp chip; Dsp chip carries out the logic judgement to three-phase voltage signal, three-phase current signal, frequency signal and switch position signal, and sends distributed power source site switch closure or open command to distributed power source site measure and control device.
Fig. 3 shows the structure connection layout of distributed power generation Comprehensive Preventing island protect system; Fig. 4 shows the logic judgement schematic diagram of isolated island detecting device; In the present embodiment, distributed generation system transformer station comprises 1# main transformer and two main transformers of 2# main transformer; Isolated island detecting device by communication module receive in the distributed generation system transformer station that the transformer substation switch checkout gear sends switch position signal and to distributed power source site measure and control device sending controling instruction; Described isolated island detecting device comprises that long-range isolated island detects and local isolated island detects two kinds of mode of operations, is specially:
(1) local isolated island detects:
The CPU module is carried out the logic judgement to three-phase voltage signal, three-phase current signal, frequency and the switch position signal of data distributed generation system at the points of common connection place, if three-phase voltage signal, three-phase current signal and frequency amplitude surpass/and lower than setting threshold or switch position signal during for minute position signal, distributed generation system transformer station enters the islet operation state; The backward distributed power source of isolated island detecting device time delay t site measure and control device issue the switch open command, excision distributed power source (i.e. anti-island protect action).
(2) long-range isolated island detects:
Switch position signal in the distributed generation system transformer station that CPU module reception transformer substation switch checkout gear sends; When described switch position signal was following situation, distributed generation system transformer station entered the islet operation state; The backward distributed power source of isolated island detecting device time delay t site measure and control device issue the switch open command, excision distributed power source (i.e. anti-island protect action):
1.: the arbitrary switch position signal in feeder switch and transformer station's high voltage side lead-in switch is a minute position signal;
2.: in 1# main transformer high side switch and 1# main transformer low-side switch, arbitrary switch position signal is a minute position signal for any one switch position signal in minute position signal and 2# main transformer high side switch, 2# main transformer low-pressure side and 3 switches of low-pressure side bus block switch;
3.: the distributed generation system transformer station of single transformer, if the arbitrary switch position signal in feeder switch, high voltage side of transformer switch, step down side switch, transformer station's high voltage side lead-in switch is for minute position during signal, distributed generation system transformer station enters the islet operation state;
In isolated island detecting device 500ms, can not receive the handshake that carrier terminal equipment sends, carrier terminal equipment communication abnormality, the long-range isolated island measuring ability of locking.
The anti-island protect system that the utility model provides, can realize that the local and remote isolated island that combines detects, and without detecting blind area, dependable performance, applied range and irrelevant with the type of distributed power source, guarantees the normal operation of electrical network.
Finally should be noted that: described embodiment is only the application's part embodiment, rather than whole embodiment.Based on the embodiment in the application, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all belong to the scope of the application's protection.
Claims (7)
1. distributed power generation Comprehensive Preventing island protect system, described system comprises isolated island detecting device, it is characterized in that, described isolated island detecting device is connected with distributed power source site measure and control device with the transformer substation switch checkout gear respectively by communicator; Described transformer substation switch checkout gear is connected with distributed generation system transformer station; Described distributed power source site measure and control device are connected with distributed power source site.
2. a kind of distributed power generation Comprehensive Preventing island protect system as claimed in claim 1, is characterized in that, described isolated island detecting device comprises data acquisition module, CPU module, I/O module and communication module; Described data acquisition module is connected with the distributed generation system points of common connection, be used to gathering three-phase voltage signal, three-phase current signal, frequency signal and the switch position signal of distributed generation system at the points of common connection place.
3. a kind of distributed power generation Comprehensive Preventing island protect system as claimed in claim 2, is characterized in that, described CPU module comprises central processing unit, static memory and dsp chip; Described dsp chip carries out the logic judgement to described three-phase voltage signal, described three-phase current signal, described frequency signal and described switch position signal, and sends distributed power source site switch closure or open command to described distributed power source site measure and control device.
4. a kind of distributed power generation Comprehensive Preventing island protect system as claimed in claim 1, is characterized in that, described communicator is the carrier terminal equipment be comprised of signal generator and signal receiver.
5. a kind of distributed power generation Comprehensive Preventing island protect system as claimed in claim 4, it is characterized in that, the described signal generator of the communicator between described isolated island detecting device and described transformer substation switch checkout gear is installed in described distributed generation system transformer station; The described signal receiver of described communicator is installed on distributed generation system points of common connection place;
The described signal generator of the communicator between described isolated island detecting device and described power grid point measure and control device is installed on described distributed generation system points of common connection place; The described signal receiver of described communicator is installed on described distributed power source place, site.
6. a kind of distributed power generation Comprehensive Preventing island protect system as claimed in claim 1, is characterized in that, described transformer substation switch checkout gear is by the switch position signal in the described distributed generation system of hard contact collection transformer station; Described switch position signal comprises transformer station's high voltage side lead-in switch position signal, main transformer high side switch position signalling, main transformer low-side switch position signalling, bus-tie circuit breaker position signalling, feeder switch position signalling and low-pressure side bus block switch position signalling.
7. a kind of distributed power generation Comprehensive Preventing island protect system as claimed in claim 1, is characterized in that, described distributed power source site measure and control device comprise power insert, exchange and input plug-in unit, central authorities' processing plug-in unit, I/O plug-in unit; Described distributed power source site measure and control device are for measuring voltage, electric current, frequency and the switch position signal of distributed power source site, and the closed and disconnected of control distributed power source site switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013203002391U CN203312781U (en) | 2013-05-29 | 2013-05-29 | Integrated anti-islanding protection system for distributed power generation |
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| CN2013203002391U CN203312781U (en) | 2013-05-29 | 2013-05-29 | Integrated anti-islanding protection system for distributed power generation |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762565A (en) * | 2014-01-20 | 2014-04-30 | 国家电网公司 | Branch line protection controller |
| CN105137221A (en) * | 2015-07-17 | 2015-12-09 | 国家电网公司 | Anti-islanding protection time measuring device |
| CN105262067A (en) * | 2015-10-08 | 2016-01-20 | 南京南瑞继保电气有限公司 | Anti-islanding protection system and method |
| CN105391033A (en) * | 2015-11-24 | 2016-03-09 | 国网甘肃省电力公司 | Layered domain-partitioned anti-islanding protection method for large-scale wind power generation |
| CN105703341A (en) * | 2015-11-24 | 2016-06-22 | 国网甘肃省电力公司 | Layered and domain-partitioned island protection method with non-fault-trip preventing function aiming at large-scale wind power plant |
| CN105762938A (en) * | 2016-04-27 | 2016-07-13 | 国网安徽省电力公司金寨县供电公司 | Distributed photovoltaic distribution network monitoring system and control method thereof |
| CN108054785A (en) * | 2018-01-27 | 2018-05-18 | 丘健兴 | A kind of circuit for preventing wind power plant island-grid |
| CN108169604A (en) * | 2018-01-30 | 2018-06-15 | 上海君世电气科技有限公司 | Distributed generation resource electricity generation grid-connecting safety monitoring method and monitoring system |
| CN111579932A (en) * | 2020-05-29 | 2020-08-25 | 海宁科茂微电网技术有限公司 | Island detection method for distributed power generation system |
-
2013
- 2013-05-29 CN CN2013203002391U patent/CN203312781U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762565A (en) * | 2014-01-20 | 2014-04-30 | 国家电网公司 | Branch line protection controller |
| CN105137221A (en) * | 2015-07-17 | 2015-12-09 | 国家电网公司 | Anti-islanding protection time measuring device |
| CN105262067A (en) * | 2015-10-08 | 2016-01-20 | 南京南瑞继保电气有限公司 | Anti-islanding protection system and method |
| 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 |
| CN105703341B (en) * | 2015-11-24 | 2018-01-19 | 国网甘肃省电力公司 | There is the layering point domain isolated island guard method of anti-jump function for large-scale wind power |
| CN105703341A (en) * | 2015-11-24 | 2016-06-22 | 国网甘肃省电力公司 | Layered and domain-partitioned island protection method with non-fault-trip preventing function aiming at large-scale wind power plant |
| CN105391033A (en) * | 2015-11-24 | 2016-03-09 | 国网甘肃省电力公司 | Layered domain-partitioned anti-islanding protection method for large-scale wind power generation |
| 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 |
| CN105762938A (en) * | 2016-04-27 | 2016-07-13 | 国网安徽省电力公司金寨县供电公司 | Distributed photovoltaic distribution network monitoring system and control method thereof |
| CN105762938B (en) * | 2016-04-27 | 2018-06-29 | 国网安徽省电力公司金寨县供电公司 | A kind of distributed photovoltaic monitoring system of distribution network and its control method |
| CN108054785A (en) * | 2018-01-27 | 2018-05-18 | 丘健兴 | A kind of circuit for preventing wind power plant island-grid |
| CN108169604A (en) * | 2018-01-30 | 2018-06-15 | 上海君世电气科技有限公司 | Distributed generation resource electricity generation grid-connecting safety monitoring method and monitoring system |
| CN111579932A (en) * | 2020-05-29 | 2020-08-25 | 海宁科茂微电网技术有限公司 | Island detection method for distributed power generation system |
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Granted publication date: 20131127 |