CN103606961A - Distributed photovoltaic power station/transformer substation 10kV bus grid-integration structure - Google Patents
Distributed photovoltaic power station/transformer substation 10kV bus grid-integration structure Download PDFInfo
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- CN103606961A CN103606961A CN201310671049.5A CN201310671049A CN103606961A CN 103606961 A CN103606961 A CN 103606961A CN 201310671049 A CN201310671049 A CN 201310671049A CN 103606961 A CN103606961 A CN 103606961A
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- bus
- power station
- photovoltaic power
- distributed photovoltaic
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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/transformer substation 10kV bus grid-integration structure. The photovoltaic power station is connected with a transformer substation 10kV bus through a cable. The structure comprises two protectors connected on the cable line between the transformer substation 10kV bus and the photovoltaic power station, wherein the two protectors are respectively arranged at the bus side and the photovoltaic power station side. 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 a kind of generating is connected to the grid, the particularly grid integration structure of a kind of distributed photovoltaic power station and the 10kV of transformer station bus, the single and site capacity 1 MW～6MW 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 the 10kV of transformer station bus, 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:
The grid integration structure of a kind of distributed photovoltaic power station and the 10kV of transformer station bus; described photovoltaic plant is connected by cable with transformer station 10kV bus; comprise: be arranged on two cover protective devices on the cable line that connects the 10kV of transformer station bus and photovoltaic plant, two described cover protective devices are separately positioned on bus bar side and photovoltaic plant side.
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 every cover protective device, comprise primary and backup overcurrent protector.
The present invention compared with prior art, has the following advantages:
Power supply reliability after can 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 the 10kV of transformer station bus;
Fig. 2 is the structured flowchart of protective device of the grid integration structure of the present invention a kind of distributed photovoltaic power station and the 10kV of transformer station bus.
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 the 10kV of transformer station bus; described photovoltaic plant is connected by cable 2 with the 10kV of transformer station bus; comprise: two cover protective device 1, the two cover protective devices 1 that are arranged on the cable line that connects the 10kV of transformer station bus and photovoltaic plant are separately positioned on bus bar side and photovoltaic plant side.
As shown in Figure 2, every cover 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 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 the 10kV of transformer station bus, 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. the grid integration structure of a distributed photovoltaic power station and the 10kV of transformer station bus; described photovoltaic plant is connected by cable (2) with the 10kV of transformer station bus; it is characterized in that; comprise: be arranged on two cover protective devices (1) on the cable line that connects the 10kV of transformer station bus and photovoltaic plant, two described cover protective devices (1) are separately positioned on bus bar side and photovoltaic plant side.
2. the grid integration structure of distributed photovoltaic as claimed in claim 1 power station and the 10kV of transformer station bus, is characterized in that, described every cover 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) 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 the 10kV of transformer station bus, is characterized in that, described overcurrent protector (13) is microcomputer protecting device.
4. the grid integration structure of distributed photovoltaic power station and the 10kV of transformer station bus as claimed in claim 2 or claim 3, is characterized in that, in described every cover protective device (1), comprises primary and backup overcurrent protector (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671049.5A CN103606961A (en) | 2013-12-12 | 2013-12-12 | Distributed photovoltaic power station/transformer substation 10kV bus grid-integration structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671049.5A CN103606961A (en) | 2013-12-12 | 2013-12-12 | Distributed photovoltaic power station/transformer substation 10kV bus grid-integration structure |
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| CN103606961A true CN103606961A (en) | 2014-02-26 |
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| CN201310671049.5A Pending CN103606961A (en) | 2013-12-12 | 2013-12-12 | Distributed photovoltaic power station/transformer substation 10kV bus grid-integration structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201174571Y (en) * | 2008-03-31 | 2008-12-31 | 林龙杰 | Micro circuit breaker having micro-computer protection and liquid crystal display |
| JP2011223852A (en) * | 2010-03-26 | 2011-11-04 | Tempearl Ind Co Ltd | Distributed power supply system |
| CN102623973A (en) * | 2012-03-31 | 2012-08-01 | 上海电力学院 | Online failure positioning and isolation method for cable in new energy electric field |
| CN203632263U (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 transformer substation 10KV bus |
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2013
- 2013-12-12 CN CN201310671049.5A patent/CN103606961A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201174571Y (en) * | 2008-03-31 | 2008-12-31 | 林龙杰 | Micro circuit breaker having micro-computer protection and liquid crystal display |
| JP2011223852A (en) * | 2010-03-26 | 2011-11-04 | Tempearl Ind Co Ltd | Distributed power supply system |
| CN102623973A (en) * | 2012-03-31 | 2012-08-01 | 上海电力学院 | Online failure positioning and isolation method for cable in new energy electric field |
| CN203632263U (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 transformer substation 10KV bus |
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Application publication date: 20140226 |