CN203632267U - Grid-connected access structure of distributed photovoltaic power station and power distribution station 380KV bus - Google Patents
Grid-connected access structure of distributed photovoltaic power station and power distribution station 380KV bus Download PDFInfo
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- CN203632267U CN203632267U CN201320812680.8U CN201320812680U CN203632267U CN 203632267 U CN203632267 U CN 203632267U CN 201320812680 U CN201320812680 U CN 201320812680U CN 203632267 U CN203632267 U CN 203632267U
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- 230000001012 protector Effects 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 13
- 230000010354 integration Effects 0.000 claims description 12
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 230000004888 barrier function Effects 0.000 description 5
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- 238000003912 environmental pollution Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
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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 380KV bus. The photovoltaic power station and the power distribution station 380KV bus are connected through a cable. The grid-connected access structure comprises a power station side protection device and a system side circuit breaker, wherein the power station side protection device is arranged on the cable line output from the photovoltaic power station, and the system side circuit breaker is arranged on the cable line accessing the power distribution station 380KV bus. The grid-connected access structure of the distributed photovoltaic power station and the power distribution station 380KV 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 380V bus, 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.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 380V 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 380V bus, described photovoltaic plant is connected by cable with power distribution station 380V 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 circuit breaker, described system side circuit breaker is arranged on the circuit of cable access power distribution station 380V 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.
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 380V bus;
Fig. 2 is the structured flowchart of the grid integration structure power station side protective device of the utility model a kind of distributed photovoltaic power station and power distribution station 380V 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 380V bus, described photovoltaic plant is connected by cable 3 with power distribution station 380V bus, comprise: power station side protective device 1, system side circuit 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, reduces power failure range; System side circuit breaker 2 is arranged on the circuit that cable 3 accesses 10kV electrical network overhead transmission line.
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 system side circuit 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 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 380V 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 (4)
1. a grid integration structure for distributed photovoltaic power station and power distribution station 380V bus, described photovoltaic plant is connected by cable (3) with power distribution station 380V 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 circuit breaker (2), described system side circuit breaker (2) is arranged on the circuit of cable (3) access power distribution station 380V bus.
2. the grid integration structure of distributed photovoltaic as claimed in claim 1 power station and power distribution station 380V 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 380V 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 380V 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320812680.8U CN203632267U (en) | 2013-12-12 | 2013-12-12 | Grid-connected access structure of distributed photovoltaic power station and power distribution station 380KV bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320812680.8U CN203632267U (en) | 2013-12-12 | 2013-12-12 | Grid-connected access structure of distributed photovoltaic power station and power distribution station 380KV bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632267U true CN203632267U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320812680.8U Expired - Lifetime CN203632267U (en) | 2013-12-12 | 2013-12-12 | Grid-connected access structure of distributed photovoltaic power station and power distribution station 380KV bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203632267U (en) |
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2013
- 2013-12-12 CN CN201320812680.8U patent/CN203632267U/en not_active Expired - Lifetime
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Granted publication date: 20140604 |
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| CX01 | Expiry of patent term |