CN103606963A - Distributed photovoltaic power station/380V user distributor box grid-integration structure - Google Patents
Distributed photovoltaic power station/380V user distributor box grid-integration structure Download PDFInfo
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- CN103606963A CN103606963A CN201310671227.4A CN201310671227A CN103606963A CN 103606963 A CN103606963 A CN 103606963A CN 201310671227 A CN201310671227 A CN 201310671227A CN 103606963 A CN103606963 A CN 103606963A
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- power station
- user
- distributed photovoltaic
- integration structure
- photovoltaic power
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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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
Abstract
The invention discloses a distributed photovoltaic power station/380V user distributor box grid-integration structure. The photovoltaic power station is connected with a power distribution station 380V bus through a cable. The structure comprises a power station side protector, wherein the power station side protector is arranged on the line of an output cable of the photovoltaic power station. The structure can ensure the power supply reliability after grid integration, reduce the power cut range and effectively implement failure removal.
Description
Technical field
The present invention relates to the grid connected structure that is connected to the grid of generating, the particularly grid integration structure of a kind of distributed photovoltaic power station and 380V user's distribution box, the single and site capacity≤100kW of this distributed photovoltaic power generation.
Background technology
20th century, particularly since the seventies,, along with the fast development of World Economics, the mankind were doubled and redoubled to the demand of the energy, and energy industry is also with unprecedented scale development.But some problems of bringing therefrom, have also caused showing great attention to of many countries.Using coal, the oil country as main primary energy, not only be faced with the problem of conventional energy resource exhaustion, and due to a large amount of uses of fossil energy, directly to emission greenhouse gas in atmosphere and aerosol etc., caused and global warming and day by day serious problem of environmental pollution natural ecosystems, social economy and health have all been formed to serious threat.Develop new forms of energy and become world energy sources strategy of sustainable development important component part.The status of regenerative resource will obtain tremendous increase in this century, according to Japan and Shell, predicts the outcome, and page in this century, regenerative resource will reach 50% of energy total amount, and photovoltaic generation will reach 15% left and right.Therefore, research is incorporated to existing electrical network by photovoltaic plant electricity is grid-connected, extremely urgent, but in existing and network process, exist reliability not high, fault report barrier inefficiency, easily cause on a large scale and have a power failure, and, after being out of order, be relatively difficult to effectively excise fault.
Summary of the invention
The grid integration structure that the object of this invention is to provide a kind of distributed photovoltaic power station and 380V user's distribution box, can report the power supply reliability of barrier after grid-connected, reduces power failure range, and excises fault after effectively realizing fault.
In order to realize above object, the present invention is achieved by the following technical solutions:
A grid integration structure for distributed photovoltaic power station and 380V user's distribution box, described photovoltaic plant is connected by cable with 380V user's distribution box, comprises:
Power station side protective device, described power station side protective device is arranged on the circuit of cable of photovoltaic plant output.
Described power station side protective device comprises:
Current sensor, described current sensor is arranged on cable;
Current transformer, described current transformer is connected with the output of current sensor by circuit;
Overcurrent protector, the input of described overcurrent protector is connected with current transformer;
Relay, the input of described relay is connected with the output of overcurrent protector;
Circuit breaker, the control signal input of described circuit breaker is connected with the output of relay by circuit.
Described overcurrent protector is microcomputer protecting device.
In described power station side protective device, comprise primary and backup overcurrent protector.
The present invention compared with prior art, has the following advantages:
Power supply reliability after reporting barrier grid-connected, reduces power failure range, and excises fault after effectively realizing fault.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the grid integration structure of the present invention a kind of distributed photovoltaic power station and 380V user's distribution box;
Fig. 2 is the structured flowchart of the grid integration structure power station side protective device of the present invention a kind of distributed photovoltaic power station and 380V user's distribution box.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
As shown in Figure 1; the grid integration structure of a kind of distributed photovoltaic power station and 380V user's distribution box; described photovoltaic plant is connected by cable 2 with 380V user's distribution box, comprises: power station side protective device 1, it is arranged on the circuit of cable 2 of photovoltaic plant output.
As shown in Figure 2, power station side protective device 1 comprises: current sensor 11, current transformer 12, overcurrent protector 13, relay 14, circuit breaker 15, and wherein, current sensor 11 is arranged on cable 3; Current transformer 12 is connected with the output of current sensor 11 by circuit, and in the present embodiment, relaying protection should be used the secondary winding of special-purpose current transformer, and its class of accuracy should adopt 5P, 10P level; The input of overcurrent protector 13 is connected with current transformer 12; in the present embodiment; overcurrent protector 13 is microcomputer protecting device; in order to ensure can and Times barrier; in power station side protective device 1, adopt the configuration of primary and backup microcomputer protecting device; guarantee that main protection is not more than 20ms whole group of operate time; return time is not more than 30ms (returning to protection outlet contact from failure removal); simultaneously, at closing by hand or while coinciding with on faulty line, protection should be able to reliable instantaneous three-phase tripping operation.Closing by hand or should reliably be failure to actuate while coinciding with fault-free circuit; The input of relay 14 is connected with the output of overcurrent protector 13; The control signal input of circuit breaker 15 is connected with the output of relay 14 by circuit.
When using; when photovoltaic plant circuit is short-circuited fault; current sensor 11 detects overcurrent; send it to overcurrent protector 13; after overcurrent protector 13 failure judgement, send to circuit breaker 15, make its quick acting; instantaneous tripping circuit breaker 15, the requirement of fast and reliable excision fault while meeting all fronts fault.
In sum, the grid integration structure of the present invention a kind of distributed photovoltaic power station and 380V user's distribution box, can report the power supply reliability of barrier after grid-connected, reduces power failure range, and excises fault after effectively realizing fault.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Those skilled in the art, read after foregoing, for multiple modification of the present invention with to substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (4)
1. a grid integration structure for distributed photovoltaic power station and 380V user's distribution box, described photovoltaic plant is connected by cable (2) with 380V user's distribution box, it is characterized in that, comprises:
Power station side protective device (1), described power station side protective device (1) is arranged on the circuit of cable (2) of photovoltaic plant output.
2. the grid integration structure of distributed photovoltaic as claimed in claim 1 power station and 380V user's distribution box, is characterized in that, described power station side protective device (1) comprises:
Current sensor (11), described current sensor (11) is arranged on cable (2);
Current transformer (12), described current transformer (12) is connected with the output of current sensor (11) by circuit;
Overcurrent protector (13), the input of described overcurrent protector (13) is connected with current transformer (12);
Relay (14), the input of described relay (14) is connected with the output of overcurrent protector (13);
Circuit breaker (15), the control signal input of described circuit breaker (15) is connected with the output of relay (14) by circuit.
3. the grid integration structure of distributed photovoltaic as claimed in claim 2 power station and 380V user's distribution box, is characterized in that, described overcurrent protector (13) is microcomputer protecting device.
4. the grid integration structure of distributed photovoltaic power station and 380V user's distribution box as claimed in claim 2 or claim 3, is characterized in that, in described power station side protective device (1), comprises primary and backup overcurrent protector (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671227.4A CN103606963B (en) | 2013-12-12 | 2013-12-12 | The grid integration structure of a kind of distributed photovoltaic power station and 380V user's distribution box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671227.4A CN103606963B (en) | 2013-12-12 | 2013-12-12 | The grid integration structure of a kind of distributed photovoltaic power station and 380V user's distribution box |
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| Publication Number | Publication Date |
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| CN103606963A true CN103606963A (en) | 2014-02-26 |
| CN103606963B CN103606963B (en) | 2016-05-11 |
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| CN201310671227.4A Active CN103606963B (en) | 2013-12-12 | 2013-12-12 | The grid integration structure of a kind of distributed photovoltaic power station and 380V user's distribution box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034583A (en) * | 2019-04-26 | 2019-07-19 | 南京软核科技有限公司 | A kind of distributed photovoltaic island state multi-source monitoring system and monitoring method |
| CN113346364A (en) * | 2021-04-30 | 2021-09-03 | 华能湖北新能源有限责任公司 | Cable terminal explosion-proof system and method |
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| CN102082419A (en) * | 2009-11-28 | 2011-06-01 | 湖北省电力公司襄樊供电公司 | Large-current medium-voltage switch cabinet capable of realizing arc light protection |
| CN201910750U (en) * | 2010-09-29 | 2011-07-27 | 龙驰幕墙工程有限公司 | Novel BIPV solar photovoltaic power station system |
| EP2367252A2 (en) * | 2010-03-19 | 2011-09-21 | National Taiwan University of Science and Technology | Overcurrent relay |
| CN102487193A (en) * | 2010-12-06 | 2012-06-06 | 西安远征智能软件有限公司 | Self-powered overcurrent protection device |
| CN203674730U (en) * | 2013-12-12 | 2014-06-25 | 国网上海市电力公司 | Distributed-type grid-connected access structure of photovoltaic power stations and 380V user power distribution boxes |
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2013
- 2013-12-12 CN CN201310671227.4A patent/CN103606963B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102082419A (en) * | 2009-11-28 | 2011-06-01 | 湖北省电力公司襄樊供电公司 | Large-current medium-voltage switch cabinet capable of realizing arc light protection |
| EP2367252A2 (en) * | 2010-03-19 | 2011-09-21 | National Taiwan University of Science and Technology | Overcurrent relay |
| CN201910750U (en) * | 2010-09-29 | 2011-07-27 | 龙驰幕墙工程有限公司 | Novel BIPV solar photovoltaic power station system |
| CN102487193A (en) * | 2010-12-06 | 2012-06-06 | 西安远征智能软件有限公司 | Self-powered overcurrent protection device |
| CN203674730U (en) * | 2013-12-12 | 2014-06-25 | 国网上海市电力公司 | Distributed-type grid-connected access structure of photovoltaic power stations and 380V user power distribution boxes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034583A (en) * | 2019-04-26 | 2019-07-19 | 南京软核科技有限公司 | A kind of distributed photovoltaic island state multi-source monitoring system and monitoring method |
| CN113346364A (en) * | 2021-04-30 | 2021-09-03 | 华能湖北新能源有限责任公司 | Cable terminal explosion-proof system and method |
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| Publication number | Publication date |
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| CN103606963B (en) | 2016-05-11 |
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