CN103606962B - The grid integration structure of a kind of distributed photovoltaic power station and 380V electrical network overhead transmission line - Google Patents
The grid integration structure of a kind of distributed photovoltaic power station and 380V electrical network overhead transmission line Download PDFInfo
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- CN103606962B CN103606962B CN201310671110.6A CN201310671110A CN103606962B CN 103606962 B CN103606962 B CN 103606962B CN 201310671110 A CN201310671110 A CN 201310671110A CN 103606962 B CN103606962 B CN 103606962B
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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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Abstract
The invention discloses the grid integration structure of a kind of distributed photovoltaic power station and 380V electrical network overhead transmission line, described photovoltaic plant is connected by cable with 380V electrical network overhead transmission line, comprise: power station side protective device, described power station side protective device is arranged on the circuit of cable of photovoltaic plant output; Overhead transmission line breaker, described overhead transmission line breaker is arranged on the circuit of cable access 380V electrical network overhead transmission line. Power supply reliability after the present invention can report barrier grid-connected, reduces power failure range, and excises fault after effectively realizing fault.
Description
Technical field
The present invention relates to the grid connected structure that a kind of generating is connected to the grid, the particularly grid integration structure of a kind of distributed photovoltaic power station and 380V electrical network overhead transmission line, the single and site capacity 20kW～300kW 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. Country using coal, oil 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 cause 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 to emission greenhouse gas in atmosphere and aerosol etc. 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, predicts the outcome according to Japan and Shell, 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 grid-connected photovoltaic plant electricity, 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 object of this invention is to provide the grid integration structure of a kind of distributed photovoltaic power station and 380V electrical network overhead transmission line, can report the power supply reliability of barrier after grid-connected, reduce power failure range, and excise 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 electrical network overhead transmission line, described photovoltaic plant is connected by cable with 380V electrical network overhead transmission line, comprises:
Power station side protective device, described power station side protective device is arranged on the circuit of cable of photovoltaic plant output;
Overhead transmission line breaker, described overhead transmission line breaker is arranged on the circuit of cable access 380V electrical network overhead transmission line.
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;
Breaker, the control signal input of described 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.
Brief description of the drawings
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 electrical network overhead transmission line;
Fig. 2 is the structured flowchart of the power station side protective device of the grid integration structure of the present invention a kind of distributed photovoltaic power station and 380V electrical network overhead transmission line.
Detailed description of the invention
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 electrical network overhead transmission line, described photovoltaic plant is connected by cable 3 with 380V electrical network overhead transmission line, comprise: power station side protective device 1, overhead transmission line breaker 2, wherein, power station side protective device 1 is arranged on the circuit of cable 3 of photovoltaic plant output, can ensure power supply reliability, reduce power failure range, for forming 10kVT link; Overhead transmission line breaker 2 is arranged on the circuit that cable 3 accesses 380V electrical network overhead transmission line, and its input is connected with the output of power station side protective device 1.
As shown in Figure 2, power station side protective device 1 comprises: current sensor 11, current transformer 12, overcurrent protector 13, relay 14, 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, relay protection should be used the Secondary Winding of special 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 actuation time; time of return 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 breaker 15 is connected with the output of relay 14 by circuit, and its output is connected with overhead transmission line breaker 2.
In the time 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 breaker 15, make its quick acting; instantaneous tripping 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 electrical network overhead transmission line, 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. Read after foregoing those skilled in the art, for multiple amendment of the present invention and substitute will be all apparent. Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (3)
1. a grid integration structure for distributed photovoltaic power station and 380V electrical network overhead transmission line, described photovoltaic plant is connected by cable (3) with 380V electrical network overhead transmission line, it is characterized in that, comprises:
Power station side protective device (1), described power station side protective device is arranged on the circuit of cable (3) of photovoltaic plant output;
Overhead transmission line breaker (2), described overhead transmission line breaker (2) is arranged on the circuit of cable (3) access 380V electrical network overhead transmission line;
Described power station side protective device (1) comprises:
Current sensor (11), described current sensor (11) is arranged on cable (3);
Current transformer (12), described current transformer (12) is connected with the output of current sensor (11);
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);
Breaker (15), the control signal input of described breaker (15) is connected with the output of relay (14).
2. the grid integration structure of distributed photovoltaic as claimed in claim 1 power station and 380V electrical network overhead transmission line, is characterized in that, described overcurrent protector (13) is microcomputer protecting device.
3. the grid integration structure of distributed photovoltaic as claimed in claim 1 or 2 power station and 380V electrical network overhead transmission line, is characterized in that, in described power station side protective device (1), comprises primary and backup overcurrent protector (13).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671110.6A CN103606962B (en) | 2013-12-12 | 2013-12-12 | The grid integration structure of a kind of distributed photovoltaic power station and 380V electrical network overhead transmission line |
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| CN201310671110.6A CN103606962B (en) | 2013-12-12 | 2013-12-12 | The grid integration structure of a kind of distributed photovoltaic power station and 380V electrical network overhead transmission line |
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| Publication Number | Publication Date |
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| CN103606962A CN103606962A (en) | 2014-02-26 |
| CN103606962B true CN103606962B (en) | 2016-05-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203632265U (en) * | 2013-12-12 | 2014-06-04 | 国网上海市电力公司 | Grid-connected access structure of distributed photovoltaic power station and 380KV power grid overhead line |
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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 |
| US8422184B2 (en) * | 2010-03-19 | 2013-04-16 | 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 |
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| CN203632265U (en) * | 2013-12-12 | 2014-06-04 | 国网上海市电力公司 | Grid-connected access structure of distributed photovoltaic power station and 380KV power grid overhead line |
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