CN214958723U - Distributed photovoltaic power generation access system - Google Patents
Distributed photovoltaic power generation access system Download PDFInfo
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- CN214958723U CN214958723U CN202120784539.6U CN202120784539U CN214958723U CN 214958723 U CN214958723 U CN 214958723U CN 202120784539 U CN202120784539 U CN 202120784539U CN 214958723 U CN214958723 U CN 214958723U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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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 distributed photovoltaic power generation access system relates to distributed generator technical field. The distributed photovoltaic power generation access system comprises a photovoltaic solar panel set, a grid-connected inverter, a metering cabinet, a main incoming line breaker and a user bus, wherein the photovoltaic solar panel set comprises a plurality of photovoltaic solar panels, a line concentration protection device, an online monitoring device, a UPS power supply, a distributed power supply feeder line breaker and a safety automatic device. The distributed photovoltaic power generation access system is provided with the UPS power supply independently in the photovoltaic solar panel set system, and the direct current of the photovoltaic system is utilized to supply power for the UPS on site, so that the UPS power supply mode is convenient and quick, an inverter is not required to be additionally arranged, and the investment cost of the system is reduced; in addition, the detection capability of the photovoltaic solar panel set system is greatly enhanced due to the addition of the UPS, and the photovoltaic solar panel set system cannot be lost when the system is powered off.
Description
Technical Field
The utility model relates to a distributed generator technical field specifically is a distributed photovoltaic power generation access system.
Background
The "distributed energy resources" refers to an energy comprehensive utilization system distributed at a user end. The primary energy is mainly gas fuel and is supplemented by renewable energy, and all available resources are utilized; the secondary energy is mainly combined by heat, electricity and cold (value) distributed at a user end, and is supplemented by other central energy supply systems, so that the cascade utilization of energy which directly meets various requirements of users is realized, and support and supplement are provided by the central energy supply system; in the aspect of environmental protection, part of pollution is dispersed and recycled, and the aim of realizing proper emission is strived for; the energy source conveying and utilizing device is arranged in a slicing mode, the loss of long-distance energy source conveying is reduced, and the safety and flexibility of energy source utilization are effectively improved.
The distributed photovoltaic power generation is particularly characterized in that the distributed photovoltaic power generation facility is built near a user site, the operation mode is characterized in that the user side automatically uses the power, the surplus electric quantity is on the internet, and the balance adjustment is carried out on a power distribution system. The distributed photovoltaic power generation follows the principles of local conditions, cleanness, high efficiency, scattered layout and near utilization, fully utilizes local solar energy resources, and replaces and reduces fossil energy consumption.
The distributed photovoltaic power generation refers in particular to a distributed power generation system which adopts photovoltaic components and directly converts solar energy into electric energy. The novel photovoltaic power station is a novel power generation and energy comprehensive utilization mode with wide development prospect, advocates the principles of near power generation, near grid connection, near conversion and near use, can effectively improve the generated energy of the photovoltaic power station with the same scale, and effectively solves the problem of loss of electric power in boosting and long-distance transportation.
The distributed photovoltaic power generation system which is most widely applied is a photovoltaic power generation project built on the roof of an urban building. The project has to be accessed to the public power grid, and the project and the public power grid supply power for nearby users.
Therefore, the distributed photovoltaic power generation has important significance for optimizing an energy structure, promoting energy conservation and emission reduction and realizing economic sustainable development.
A traditional photovoltaic power generation system can provide power for a power grid in an internet-surfing mode, but the load prediction difficulty of a region where the traditional photovoltaic power generation system is located is increased due to the fact that distributed photovoltaic is connected to the grid, and an existing load increase mode is changed. The access of a large number of distributed power sources makes the reconstruction and management of the power distribution network more complicated. Meanwhile, the capacity of the distributed photovoltaic power generation system is usually small, self-sufficiency can be achieved for power users to a certain extent, if the photovoltaic power is insufficient, power transmission from a power grid can be selected, and the power of the photovoltaic power generation system is not on line.
Traditional off-grid photovoltaic power generation access system does not have independent UPS power setting, is difficult to in time detect photovoltaic power generation system under the condition of system power loss, also is when photovoltaic power generation system operates again often when the system fault appears, and the degree of difficulty of troubleshooting and repairing of trouble this moment can greatly increased, and the technical staff is difficult to in time judge the fault point of system.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides a distributing type photovoltaic power generation access system has solved traditional off-grid photovoltaic power generation access system and has lost the problem that the back system breaks down and can not in time investigate, discover.
(II) technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a distributed photovoltaic power generation access system comprises a photovoltaic solar panel set, a grid-connected inverter, a metering cabinet, a total incoming line breaker and a user bus, wherein the photovoltaic solar panel set is connected with the input end of the grid-connected inverter, the output end of the grid-connected inverter is connected with the low-voltage side of a transformer, the high-voltage side of the transformer is connected with the input end of the metering cabinet, the output end of the metering cabinet is connected with the input end of the total incoming line breaker, the output end of the total incoming line breaker is connected with the input end of the user bus, the photovoltaic solar panel set comprises a plurality of photovoltaic solar panels, a line concentration protection device, an online monitoring device, a UPS power supply, a distributed power supply feeder breaker and a safety automatic device, the photovoltaic solar panels are connected with the input end of the line concentration protection device after being connected in parallel, and the output end of the line concentration protection device is respectively connected with the input end of the UPS power supply and the input end of the distributed power supply feeder breaker, distributed power feeder circuit breaker output is connected with the measurement cabinet input, UPS power output respectively with line concentration protection device, on-line monitoring device, distributed power feeder circuit breaker, grid-connected inverter, safe automatics electric connection, a plurality of photovoltaic solar energy electroplax, UPS power, line concentration protection device's device signal all with on-line monitoring device electric connection, line monitoring device's output signal and safe automatics electric connection, safe automatics and distributed power feeder circuit breaker electric connection.
Preferably, two meters are arranged in the metering cabinet.
Preferably, the two meters are connected in parallel with each other.
Preferably, the two meters are connected in series with each other.
Preferably, the two meters are of the same model.
Preferably, the two gauges are of different models.
Preferably, a reactive power compensation device is arranged on the user bus.
(III) advantageous effects
The utility model provides a distributing type photovoltaic power generation access system. The method has the following beneficial effects:
the distributed photovoltaic power generation access system is provided with the UPS power supply independently in the photovoltaic solar panel set system, and the direct current of the photovoltaic system is utilized to supply power for the UPS on site, so that the UPS power supply mode is convenient and quick, an inverter is not required to be additionally arranged, and the investment cost of the system is reduced; in addition, the detection capability of the photovoltaic solar panel set system is greatly enhanced due to the addition of the UPS, and the photovoltaic solar panel set system cannot be lost when the system is powered off.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
fig. 2 is a schematic structural diagram of a photovoltaic solar panel set system.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1: referring to fig. 1-2, the present invention provides a technical solution: a distributed photovoltaic power generation access system comprises a photovoltaic solar panel set, a grid-connected inverter, a metering cabinet, a main incoming line breaker and a user bus, wherein the photovoltaic solar panel set is connected with the input end of the grid-connected inverter, the output end of the grid-connected inverter is connected with the low-voltage side of a transformer, the high-voltage side of the transformer is connected with the input end of the metering cabinet, the output end of the metering cabinet is connected with the input end of the main incoming line breaker, the output end of the main incoming line breaker is connected with the input end of the user bus, the photovoltaic solar panel set comprises a plurality of photovoltaic solar panels, a line concentration protection device, an online monitoring device, a UPS power supply, a distributed power supply feeder breaker and a safety automatic device, the plurality of photovoltaic solar panels are connected with the input end of the line concentration protection device after being connected in parallel, the output end of the line concentration protection device is respectively connected with the input end of the UPS power supply and the input end of the distributed power supply feeder breaker, and the output end of the distributed power supply feeder breaker is connected with the input end of the metering cabinet, the UPS power output end is respectively electrically connected with the line concentration protection device, the on-line monitoring device, the distributed power feeder circuit breaker, the grid-connected inverter and the safety automatic device, device signals of the photovoltaic solar panels, the UPS power supply and the line concentration protection device are all electrically connected with the on-line monitoring device, an output signal of the line monitoring device is electrically connected with the safety automatic device, and the safety automatic device is electrically connected with the distributed power feeder circuit breaker.
Example 2: two meters are arranged in the metering cabinet.
Example 3: the two meters are connected in parallel.
Example 4: the two meters are connected in series.
Example 5: the two meters are of the same model.
Example 6: the two gauges are of different models.
Example 7: and a reactive power compensation device is arranged on the user bus.
And (3) during normal operation: the electric energy of a plurality of photovoltaic solar panels is collected to a line concentration protection device after being connected in parallel, the line concentration protection device is connected with a grid-connected inverter through a distributed power feeder circuit breaker, the electric energy is converted into alternating current from direct current, then the alternating current is led into a transformer, the voltage is boosted to 10kv from 0.4kv, and finally the alternating current passes through a metering cabinet and is connected to a user bus through a main incoming line circuit breaker; meanwhile, the line concentration protection device inputs part of electric energy into the UPS power supply to charge the UPS power supply, and the UPS power supply respectively supplies power for the line concentration protection device, the online monitoring device, the distributed power feeder circuit breaker, the grid-connected inverter and the safety automatic device;
the line concentration protection device detects the state of each photovoltaic solar panel in time, if a photovoltaic solar panel fails, the failed photovoltaic solar panel can be isolated in time without affecting the whole system;
the online monitoring device detects a plurality of photovoltaic solar panels, UPS power supplies and line concentration protection devices in the system, if a large fault exists, a signal can be sent to the safety automatic device, and the safety automatic device opens the distributed power supply feeder circuit breaker to protect the whole system from being influenced.
When the system loses power: due to the arrangement of the UPS, the line concentration protection device, the online monitoring device, the distributed power feeder circuit breaker, the grid-connected inverter and the safety automatic device can still be in a working state and can continuously detect the devices which are detected respectively.
In summary, the distributed photovoltaic power generation access system independently sets a UPS power supply in the photovoltaic solar panel system, and supplies power to the UPS by using the direct current of the photovoltaic system on site, so that the UPS power supply mode is convenient and fast, an inverter is not required to be additionally set, and the investment cost of the system is reduced; in addition, the detection capability of the photovoltaic solar panel set system is greatly enhanced due to the addition of the UPS, and the photovoltaic solar panel set system cannot be lost when the system is powered off.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a distributed photovoltaic power generation access system, includes photovoltaic solar panel group, grid-connected inverter, measurement cabinet, total inlet wire circuit breaker and user's generating line, photovoltaic solar panel group is connected with the grid-connected inverter input, the grid-connected inverter output is connected with the transformer low pressure side, the transformer high pressure side is connected with measurement cabinet input, measurement cabinet output is connected with total inlet wire circuit breaker input, total inlet wire circuit breaker output is connected with user's generating line input, its characterized in that: the photovoltaic solar panel group comprises a plurality of photovoltaic solar panels, a line concentration protection device, an online monitoring device, a UPS power supply, a distributed power supply feeder circuit breaker and a safety automatic device, wherein the photovoltaic solar panels are connected in parallel and then connected with the input end of the line concentration protection device, the output end of the line concentration protection device is respectively connected with the input end of the UPS power supply and the input end of the distributed power supply feeder circuit breaker, the output end of the distributed power supply feeder circuit breaker is connected with the input end of a metering cabinet, the output end of the UPS power supply is respectively electrically connected with the line concentration protection device, the online monitoring device, the distributed power supply feeder circuit breaker, a grid-connected inverter and the safety automatic device, device signals of the photovoltaic solar panels, the UPS power supply and the line concentration protection device are all electrically connected with the online monitoring device, and the output signal of the line monitoring device is electrically connected with the safety automatic device, and the safety automatic device is electrically connected with the distributed power supply feeder circuit breaker.
2. The distributed photovoltaic power generation access system of claim 1, wherein: two meters are arranged in the metering cabinet.
3. The distributed photovoltaic power generation access system of claim 2, wherein: the two meters are connected in parallel.
4. The distributed photovoltaic power generation access system of claim 2, wherein: the two meters are connected in series.
5. The distributed photovoltaic power generation access system according to any one of claims 2 to 4, wherein: the two meters are of the same type.
6. The distributed photovoltaic power generation access system according to any one of claims 2 to 4, wherein: the two gauge models are different.
7. The distributed photovoltaic power generation access system of claim 6, wherein: and a reactive power compensation device is arranged on the user bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120784539.6U CN214958723U (en) | 2021-04-16 | 2021-04-16 | Distributed photovoltaic power generation access system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120784539.6U CN214958723U (en) | 2021-04-16 | 2021-04-16 | Distributed photovoltaic power generation access system |
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| Publication Number | Publication Date |
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| CN214958723U true CN214958723U (en) | 2021-11-30 |
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| CN202120784539.6U Active CN214958723U (en) | 2021-04-16 | 2021-04-16 | Distributed photovoltaic power generation access system |
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2021
- 2021-04-16 CN CN202120784539.6U patent/CN214958723U/en active Active
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