CN103618338B - The grid integration structure of a kind of distributed photovoltaic power station and power distribution station 10kV bus - Google Patents
The grid integration structure of a kind of distributed photovoltaic power station and power distribution station 10kV bus Download PDFInfo
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- CN103618338B CN103618338B CN201310671038.7A CN201310671038A CN103618338B CN 103618338 B CN103618338 B CN 103618338B CN 201310671038 A CN201310671038 A CN 201310671038A CN 103618338 B CN103618338 B CN 103618338B
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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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Abstract
The invention discloses the grid integration structure of a kind of distributed photovoltaic power station and power distribution station 10kV bus, described photovoltaic plant is connected by cable with power distribution station 10kV bus, comprise: side, power station protective device, described side, power station protective device is arranged on the circuit of the cable that photovoltaic plant exports; System side protective device, described system side protective device is arranged on the circuit of cable access power distribution station 10kV bus.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 is connected to the grid of generating electricity, the particularly grid integration structure of a kind of distributed photovoltaic power station and power distribution station 10kV bus, this distributed photovoltaic power generation single site capacity 300kW ~ 6MW.
Background technology
20th century, particularly since the seventies, along with the fast development of World Economics, the demand of the mankind to the energy was doubled and redoubled, and energy industry is also with unprecedented scale development.But some problems brought therefrom, also result in showing great attention to of many countries.Using coal, oil as the country of 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, cause global warming and day by day serious problem of environmental pollution directly to emission greenhouse gas and aerosol etc. in air, all serious threat is constituted to natural ecosystems, social economy and health.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, and predict the outcome according to Japan and Shell, page in this century, regenerative resource will reach 50% of energy total amount, and photovoltaic generation will reach about 15%.Therefore, study and be incorporated to existing electrical network by grid-connected for photovoltaic plant electricity, extremely urgent, but existing and in network process, there is reliability not high, fault report barrier inefficiency, easily cause and have a power failure on a large scale, and, compare after being out of order and be 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 power distribution station 10kV bus, the power supply reliability after barrier can be reported 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 power distribution station 10kV bus, described photovoltaic plant is connected by cable with power distribution station 10kV bus, comprises:
Side, power station protective device, described side, power station protective device is arranged on the circuit of the cable that photovoltaic plant exports;
System side protective device, described system side protective device is arranged on the circuit of cable access power distribution station 10kV bus.
Described side, power station 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.
Primary and backup overcurrent protector is comprised in described side, power station protective device.
Described system side protective device comprises and is connected in series:
High-tension fuse, described high-tension fuse is connected by circuit with the output of circuit breaker by circuit;
On-load switch, the input of described on-load switch is connected with the output of high-tension fuse, its output access power distribution station 10kV bus.
The present invention compared with prior art, has the following advantages:
Power supply reliability after barrier can be reported 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 a kind of distributed photovoltaic power station of the present invention and power distribution station 10kV bus;
Fig. 2 is the structured flowchart of side, the power station protective device of the grid integration structure of a kind of distributed photovoltaic power station of the present invention and power distribution station 10kV 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 power distribution station 10kV bus, described photovoltaic plant is connected by cable 3 with power distribution station 10kV bus, comprise: side, power station protective device 1, overhead transmission line protective device 2, wherein, side, power station protective device 1 is arranged on the circuit of the cable 3 that photovoltaic plant exports, and can ensure power supply reliability, reduces power failure range; System side protective device 2 is arranged on cable 3 and accesses on the circuit of power distribution station 10kV bus, in the present embodiment, system side protective device 2 is selected and is connected in series: high-tension fuse 21 and on-load switch 22, wherein, high-tension fuse 21 is connected by circuit by the output of circuit with side, power station protective device 1; The input of on-load switch 22 is connected with the output of high-tension fuse 21, its output access power distribution station 10kV bus.
As shown in Figure 2, side, power station 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 by the output of circuit with current sensor 11, and in the present embodiment, relaying protection should use 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; the configuration of primary and backup microcomputer protecting device is adopted in side, power station protective device 1; guarantee that main protection is not more than 20ms whole group of operate time; return time is not more than 30ms (returning to protection exit contact from failure removal); simultaneously at closing by hand or when 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 when 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 by the output of circuit with relay 14, and its output is connected with high-tension fuse 21.
When deployed; photovoltaic plant circuit be short-circuited fault time; 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 during satisfied fault completely.
In sum, the grid integration structure of a kind of distributed photovoltaic power station of the present invention and power distribution station 10kV bus, the power supply reliability after barrier can be reported grid-connected, reduces power failure range, and excises fault after effectively realizing fault.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, 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 (4)
1. a grid integration structure for distributed photovoltaic power station and power distribution station 10kV bus, described photovoltaic plant is connected by cable (3) with power distribution station 10kV bus, it is characterized in that, comprises:
Side, power station protective device (1), described side, power station protective device is arranged on the circuit of the cable (3) that photovoltaic plant exports;
System side protective device (2), described system side protective device (2) is arranged on the circuit of cable (3) access power distribution station 10kV bus;
Described side, power station 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 by the output of circuit with 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);
Circuit breaker (15), the control signal input of described circuit breaker (15) is connected by the output of circuit with relay (14).
2. the grid integration structure of distributed photovoltaic power station as claimed in claim 1 and power distribution station 10kV bus, it is characterized in that, described overcurrent protector (13) is microcomputer protecting device.
3. the grid integration structure of distributed photovoltaic power station as claimed in claim 1 or 2 and power distribution station 10kV bus, is characterized in that, comprise primary and backup overcurrent protector (13) in described side, power station protective device (1).
4. the grid integration structure of distributed photovoltaic power station as claimed in claim 1 and power distribution station 10kV bus, is characterized in that, described system side protective device (2) comprises and is connected in series:
High-tension fuse (21), described high-tension fuse (21) is connected by circuit by the output of circuit with circuit breaker (15);
On-load switch (22), the input of described on-load switch (22) is connected with the output of high-tension fuse (21), its output access power distribution station 10kV bus.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671038.7A CN103618338B (en) | 2013-12-12 | 2013-12-12 | The grid integration structure of a kind of distributed photovoltaic power station and power distribution station 10kV bus |
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|---|---|---|---|
| CN201310671038.7A CN103618338B (en) | 2013-12-12 | 2013-12-12 | The grid integration structure of a kind of distributed photovoltaic power station and power distribution station 10kV bus |
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| Publication Number | Publication Date |
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| CN103618338A CN103618338A (en) | 2014-03-05 |
| CN103618338B true CN103618338B (en) | 2016-03-23 |
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| CN201310671038.7A Active CN103618338B (en) | 2013-12-12 | 2013-12-12 | The grid integration structure of a kind of distributed photovoltaic power station and power distribution station 10kV bus |
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| CN103928944B (en) * | 2014-05-07 | 2016-03-09 | 国家电网公司 | Photovoltaic DC-to-AC converter power stage combined adjuster |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202333772U (en) * | 2011-11-04 | 2012-07-11 | 天宝电子（惠州）有限公司 | Input protection device for photovoltaic grid-connected inverter |
| 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 |
| CN203205731U (en) * | 2013-04-18 | 2013-09-18 | 山东五洲电气股份有限公司 | Street lamp illumination intelligent power distribution device |
| CN203632264U (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 power distribution station 10KV bus |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202333772U (en) * | 2011-11-04 | 2012-07-11 | 天宝电子（惠州）有限公司 | Input protection device for photovoltaic grid-connected inverter |
| 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 |
| CN203205731U (en) * | 2013-04-18 | 2013-09-18 | 山东五洲电气股份有限公司 | Street lamp illumination intelligent power distribution device |
| CN203632264U (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 power distribution station 10KV bus |
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Effective date of registration: 20200714 Address after: 200131 4 / F and 5 / F, building 1, No. 251 libing road and 28 Faraday Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee after: China Online Shanghai Energy Internet Research Institute Co.,Ltd. Address before: 200002 Nanjing East Road, Shanghai, No. 181, No. Patentee before: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. |