CN207117195U - The anti-isolated island device of new-energy grid-connected power supply - Google Patents
The anti-isolated island device of new-energy grid-connected power supply Download PDFInfo
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- CN207117195U CN207117195U CN201721129920.9U CN201721129920U CN207117195U CN 207117195 U CN207117195 U CN 207117195U CN 201721129920 U CN201721129920 U CN 201721129920U CN 207117195 U CN207117195 U CN 207117195U
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- transformer
- isolated island
- power supply
- master controller
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The utility model discloses the anti-isolated island device of new-energy grid-connected power supply; distribution transformer including a 10kV/400V is used for normal power supply; anti- isolated island protection device is installed in outside grid entry point; the anti-isolated island protection device includes the input terminal being connected with the low-pressure side of the distribution transformer; the input terminal is connected with built-in transformer; the built-in transformer is connected with master controller, and the master controller gathers each phase current of low-pressure side, zero-sequence current and the supply side voltage signal of the distribution transformer by the built-in transformer；The master controller is also associated with liquid crystal display and the relay for controlling grid-connected switch on and off.The utility model in outside grid entry point by setting anti-isolated island to detect, protection device; distributed isolated island power supply still can be quickly cut out when island phenomenon occurs when inverter and wind-powered electricity generation, photovoltaic generating system carry anti-isolated island failure of apparatus, ensures safe operation of electric network.
Description
Technical field
It the utility model is related to the anti-isolated island device of the grid-connected power supply technique of clean energy resource, especially new-energy grid-connected power supply.
Background technology
With popularizing for the new energy technologies such as wind energy, solar energy, the distributed new generating for accessing power distribution network is set
It is standby more and more, due to the external cause or natural cause of grid-connected system, it is more likely that local power supply system islet operation is caused,
This endangers all very greatly for the generating equipment and system power network at scene, needs to carry out coherent detection, controls to prevent local
Electric power system island is run.
Utility model content
The anti-isolated island device of new-energy grid-connected power supply provided by the utility model, for entering to the low-pressure side of distribution transformer
Row monitors to prevent local power supply system islet operation in real time.
In order to solve the above problems, the anti-isolated island device of new-energy grid-connected power supply provided by the utility model, including one
10kV/400V distribution transformer is used for normal power supply, and anti-isolated island protection device, the anti-isolated island are provided with outside grid entry point
Protection device includes the input terminal being connected with the low-pressure side of the distribution transformer, and the input terminal is connected with built-in mutual inductance
Device, the built-in transformer include current transformer and voltage transformer, and the current transformer is that Integral three-phase electric current is mutual
Sensor, the built-in transformer are connected with master controller, and the master controller gathers the distribution by the built-in transformer
Each phase current of low-pressure side, zero-sequence current and the supply side voltage signal of transformer；The master controller is also associated with liquid crystal display
Device and the relay for controlling grid-connected switch on and off.
The anti-isolated island device of new-energy grid-connected power supply provided by the utility model also has following technical characteristic：
Further, the master controller is also associated with GSM transport modules or GPRS transmission module, and the master controller leads to
Cross the GSM transport modules or the GPRS transmission module communicates with remote server.
The utility model has the advantages that：The anti-isolated island device in outside grid entry point by setting anti-isolated island to examine
Survey, protection device, still isolated island can occur when inverter and wind-powered electricity generation, photovoltaic generating system carry anti-isolated island failure of apparatus
Distributed isolated island power supply is quickly cut out during phenomenon, ensures safe operation of electric network；Master controller can be adopted in real time by built-in transformer
Collect electric current, the information of voltage of distribution transformer low-pressure side, when island phenomenon occurs in time by the grid-connected switch of Control
Disconnect quickly to cut out distributed isolated island power supply, reliability height.
Brief description of the drawings
Fig. 1 is the schematic view of the mounting position of the anti-isolated island device of the utility model embodiment；
Fig. 2 is the internal structure schematic diagram of the anti-isolated island device of the utility model embodiment.
Embodiment
Describe the utility model in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that do not rushing
In the case of prominent, the feature in embodiment and embodiment in the utility model can be mutually combined.
In the embodiment of the anti-isolated island device of new-energy grid-connected of the present utility model power supply as shown in Figure 1 and Figure 2, this is new
The distribution transformer 10 that the anti-isolated island device of the grid-connected power supply of the energy includes a 10kV/400V is used for normal power supply, in outside simultaneously
Site is provided with anti-isolated island protection device 20, and anti-isolated island protection device 20 is defeated including being connected with the low-pressure side of distribution transformer 10
Entering terminal, the input terminal is connected with built-in transformer 21, and built-in transformer 21 includes current transformer and voltage transformer,
The current transformer is Integral three-phase current transformer, and the built-in transformer is connected with master controller 22, master controller
22 gather each phase current of low-pressure side, zero-sequence current and the supply side voltage signal of distribution transformer 10 by built-in transformer 21；
Master controller 22 is also associated with liquid crystal display 23 and the relay 24 for controlling grid-connected switch on and off.It is new in the embodiment
The anti-isolated island device of the grid-connected power supply of the energy, by setting anti-isolated island detection, protection device in outside grid entry point, in inverter and wind
Electricity, photovoltaic generating system still can quickly cut out distributed isolated island when carrying anti-isolated island failure of apparatus when island phenomenon occurs
Power supply, ensure safe operation of electric network；Master controller can be gathered in real time by built-in transformer distribution transformer low-pressure side electric current,
Information of voltage, switched off in time by the way that Control is grid-connected quickly to cut out distributed isolated island electricity when island phenomenon occurs
Source, reliability are high.
In the above-described embodiments, the anti-isolated island device of new-energy grid-connected power supply also has following technical characteristic：Master controller
22 are also associated with GSM transport modules or GPRS transmission module, and master controller 22 is passed by the GSM transport modules or the GPRS
Defeated module communicates with remote server 25, thus the too high more line of current value occurs in measurement point, can transmit messages police in liquid crystal display
Information, also warning message can be uploaded to remote server by communicating.The anti-isolated island device detects AC network in real time
(AC380V, 50Hz) current supply circuit three-phase voltage, electric current (measurement point), judge power flow direction and watt level and frequency height,
If the high-power of moment, which occurs, in system send phenomenon, the tripping operation of high level inverse probability fast tripping protection, the anti-locking system of grid entry point is cut off
There is island phenomenon.The device is configured with overvoltage protection tripping operation, low electric protection tripping operation, too high frequency protection tripping operation, low frequency guarantor
Shield tripping operation, prevent island phenomenon from making the influence of paired systems power network and the damage of equipment after occurring.The device can concentrate group screen
It can disperse to be arranged on high-tension switch cabinet on the spot, each interval function is independent, only common by network joint, information between each device
Enjoy, not only flexibility is very strong for such whole system, and its reliability has also obtained large increase, and any device failure only influences
One local element.Master controller employs high-performance processor and high-resolution A/D converter, per the point sampling of cycle 32,
With reference to special measurement CT, the high accuracy of remote measurement amount ensure that.Defencive function is completely independent of communication network, and whether not network paralysis
Influence protection normal operation.The device uses hermetically sealed design, plus well-designed anti-interference component, makes vibration resistance, resists
Electromagnetic interference capability improves a lot.The device is also devised with software and hardware double watchdogs function, make whole system and meanwhile have compared with
High measurement accuracy and antijamming capability.Communication modes use 485 interfaces, and its feature is：It is simple in construction, only both threads with it is outer
Portion is connected；Transmission speed reaches as high as 115200bps；Transmission range is farthest up to 1KM；Also can be required to be changed to optical fiber according to user
Communication.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the utility model technology
The spirit and scope of scheme.
Claims (2)
1. the anti-isolated island device of new-energy grid-connected power supply, including 10kV/400V distribution transformer are used for normal power supply, its
It is characterised by, anti-isolated island protection device is installed in outside grid entry point, the anti-isolated island protection device includes becoming with the distribution
The connected input terminal of the low-pressure side of depressor, the input terminal are connected with built-in transformer, and the built-in transformer includes electricity
Current transformer and voltage transformer, the current transformer are Integral three-phase current transformer, the built-in transformer connection
Have a master controller, the master controller gathered by the built-in transformer distribution transformer each phase current of low-pressure side,
Zero-sequence current and supply side voltage signal；The master controller is also associated with liquid crystal display and for controlling grid-connected switch on and off
Relay.
2. the anti-isolated island device of new-energy grid-connected power supply according to claim 1, it is characterised in that the master controller is also
GSM transport modules or GPRS transmission module are connected with, the master controller passes through the GSM transport modules or the GPRS transmission
Module communicates with remote server.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721129920.9U CN207117195U (en) | 2017-09-05 | 2017-09-05 | The anti-isolated island device of new-energy grid-connected power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721129920.9U CN207117195U (en) | 2017-09-05 | 2017-09-05 | The anti-isolated island device of new-energy grid-connected power supply |
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| Publication Number | Publication Date |
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| CN207117195U true CN207117195U (en) | 2018-03-16 |
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| CN201721129920.9U Active CN207117195U (en) | 2017-09-05 | 2017-09-05 | The anti-isolated island device of new-energy grid-connected power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066767A (en) * | 2018-07-09 | 2018-12-21 | 国网浙江省电力有限公司台州供电公司 | A kind of zero blind area anti-islanding protection system of low pressure distributed generation resource |
| CN109814500A (en) * | 2018-12-28 | 2019-05-28 | 中国电力科学研究院有限公司 | A kind of electric energy control method monitored based on low-voltage load with control integrated apparatus |
| WO2021258547A1 (en) * | 2020-06-22 | 2021-12-30 | 北京金风科创风电设备有限公司 | Method, apparatus, and system for monitoring islanding electricity generation unit |
-
2017
- 2017-09-05 CN CN201721129920.9U patent/CN207117195U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066767A (en) * | 2018-07-09 | 2018-12-21 | 国网浙江省电力有限公司台州供电公司 | A kind of zero blind area anti-islanding protection system of low pressure distributed generation resource |
| CN109066767B (en) * | 2018-07-09 | 2023-10-20 | 国网浙江省电力有限公司台州供电公司 | Zero blind area anti-island protection system of low-voltage distributed power supply |
| CN109814500A (en) * | 2018-12-28 | 2019-05-28 | 中国电力科学研究院有限公司 | A kind of electric energy control method monitored based on low-voltage load with control integrated apparatus |
| WO2021258547A1 (en) * | 2020-06-22 | 2021-12-30 | 北京金风科创风电设备有限公司 | Method, apparatus, and system for monitoring islanding electricity generation unit |
| CN113904358A (en) * | 2020-06-22 | 2022-01-07 | 北京金风科创风电设备有限公司 | Method, device and system for monitoring power generation unit in island operation |
| US11916395B2 (en) | 2020-06-22 | 2024-02-27 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd | Method, apparatus, and system for monitoring islanding electricity generation unit |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Ya Inventor after: Hu Baolin Inventor after: Zhang Jingchun Inventor after: Liu Jikun Inventor after: Wei Dong Inventor after: Li Chong Inventor after: Tian Wenxiang Inventor after: Liu Chunhui Inventor after: Wang Kai Inventor before: Sun Mu Inventor before: Hu Baolin Inventor before: Zhang Jingchun Inventor before: Liu Jikun Inventor before: Wei Dong Inventor before: Li Yu Inventor before: Tian Wenxiang Inventor before: Liu Chunhui |
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| CB03 | Change of inventor or designer information |