CN203632264U - Grid-connected access structure of distributed photovoltaic power station and power distribution station 10KV bus - Google Patents
Grid-connected access structure of distributed photovoltaic power station and power distribution station 10KV bus Download PDFInfo
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- CN203632264U CN203632264U CN201320812588.1U CN201320812588U CN203632264U CN 203632264 U CN203632264 U CN 203632264U CN 201320812588 U CN201320812588 U CN 201320812588U CN 203632264 U CN203632264 U CN 203632264U
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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 utility model discloses a grid-connected access structure of a distributed photovoltaic power station and a power distribution station 10KV bus. The photovoltaic power station and the power distribution station 10KV bus are connected through a cable. The grid-connected access structure comprises a power station side protection device and a system side protection device, wherein the power station side protection device is arranged on the cable line output from the photovoltaic power station, and the system side protection device is arranged on the cable line accessing the power distribution station 10KV bus. The grid-connected access structure of the distributed photovoltaic power station and the power distribution station 10KV bus is capable of ensuring the power supply reliability after the grid connection, reducing the power failure range and effectively realizing fault elimination after a failure.
Description
Technical field
The utility model relates to the grid connected structure that generating is connected to the grid, the particularly grid integration structure of a kind of distributed photovoltaic power station and power distribution station 10kV bus, the single and site capacity 300kW～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.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.
Utility model content
The purpose of this utility model is to provide the grid integration structure of a kind of distributed photovoltaic power station and power distribution station 10kV 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 utility model is achieved through 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:
Power station side protective device, described power station side protective device is arranged on the circuit of cable of photovoltaic plant output;
System side protective device, described system side protective device is arranged on the circuit of cable access power distribution station 10kV bus.
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.
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 utility model 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 utility model a kind of distributed photovoltaic power station and power distribution station 10kV bus;
Fig. 2 is the structured flowchart of the power station side protective device of the grid integration structure of the utility model a kind of distributed photovoltaic power station and power distribution station 10kV bus.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the utility model 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: power station side protective device 1, overhead transmission line protective device 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, reduces power failure range; System side protective device 2 is arranged on the circuit that cable 3 accesses 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 with the output of power station side protective device 1 by circuit; 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, 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 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, and its output is connected with high-tension fuse 21.
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 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 utility model a kind of distributed photovoltaic power station and power distribution station 10kV 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 utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.Read after foregoing those skilled in the art, for multiple modification of the present utility model and substitute will be all apparent.Therefore, protection range of the present utility model should be limited to the appended claims.
Claims (5)
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:
Power station side protective device (1), described power station side protective device is arranged on the circuit of cable (3) of photovoltaic plant output;
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.
2. the grid integration structure of distributed photovoltaic as claimed in claim 1 power station and power distribution station 10kV bus, is characterized in that, 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) 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 power distribution station 10kV bus, is characterized in that, described overcurrent protector (13) is microcomputer protecting device.
4. the grid integration structure of distributed photovoltaic power station and power distribution station 10kV bus 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).
5. the grid integration structure of distributed photovoltaic as claimed in claim 2 power station 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 with the output of circuit breaker (15) by circuit;
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320812588.1U CN203632264U (en) | 2013-12-12 | 2013-12-12 | Grid-connected access structure of distributed photovoltaic power station and power distribution station 10KV bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320812588.1U CN203632264U (en) | 2013-12-12 | 2013-12-12 | Grid-connected access structure of distributed photovoltaic power station and power distribution station 10KV bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632264U true CN203632264U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320812588.1U Withdrawn - After Issue CN203632264U (en) | 2013-12-12 | 2013-12-12 | Grid-connected access structure of distributed photovoltaic power station and power distribution station 10KV bus |
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| CN (1) | CN203632264U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618338A (en) * | 2013-12-12 | 2014-03-05 | 国网上海市电力公司 | Grid-connected access structure of distributed photovoltaic power station and 10-kV busbar of power distribution station |
-
2013
- 2013-12-12 CN CN201320812588.1U patent/CN203632264U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618338A (en) * | 2013-12-12 | 2014-03-05 | 国网上海市电力公司 | Grid-connected access structure of distributed photovoltaic power station and 10-kV busbar of power distribution station |
| CN103618338B (en) * | 2013-12-12 | 2016-03-23 | 国网上海市电力公司 | The grid integration structure of a kind of distributed photovoltaic power station and power distribution station 10kV bus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140604 Effective date of abandoning: 20160323 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |