CN204465446U - A kind of photovoltaic generating system topological structure based on direct current photovoltaic module - Google Patents
A kind of photovoltaic generating system topological structure based on direct current photovoltaic module Download PDFInfo
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- CN204465446U CN204465446U CN201520097954.9U CN201520097954U CN204465446U CN 204465446 U CN204465446 U CN 204465446U CN 201520097954 U CN201520097954 U CN 201520097954U CN 204465446 U CN204465446 U CN 204465446U
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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
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The utility model relates to a kind of photovoltaic generating system topological structure based on direct current photovoltaic module, belongs to technical field of photovoltaic power generation.This structure comprises direct current photovoltaic module, GPRS module, DC bus, inverter, energy storage device, energy storage device converter, ac bus, two-way ammeter, AC load.Described direct current photovoltaic module is connected with described DC bus, and is connected with described GPRS module; Described energy storage device converter one end is connected with described DC bus, and the other end is connected with described energy storage device; Described inverter one end is connected with described DC bus, and the other end is connected with described ac bus; Described AC load is connected with described ac bus; Described two-way ammeter one end is connected with described ac bus, and the other end is connected with electrical network.The utility model thoroughly can solve the hot spot effect that shade etc. is formed, and under achieving any illumination condition, photovoltaic system generating efficiency maximizes, and structure is simply easy to construction, is especially applicable to distributed photovoltaic power station.
Description
Technical field
The utility model relates to a kind of photovoltaic generating system, and especially a kind of photovoltaic generating system topological structure based on direct current photovoltaic module, belongs to technical field of photovoltaic power generation.
Background technology
Photovoltaic generating system topological structure conventional at present has centralized, tandem, multiple branch circuit formula.Wherein, centralized configuration, according to the electric pressure designed and capacity, is connected to header box a large amount of photovoltaic module by the mode of series and parallel connections, then through a centralized inverter, the direct current energy that photovoltaic array exports is transformed to AC energy; Multiple photovoltaic module series connection is formed photovoltaic module string by tandem and multiple branch circuit formula structure, and each component string is by after DC/DC converter boost, and another mistake becomes output AC electric energy.The common drawback of these three kinds of topological structures is: the serial or parallel connection that there is photovoltaic module in system, the MPPT maximum power point tracking of system is for whole connection in series-parallel photovoltaic array or component string, cannot ensure that each assembly all operates in maximum power point, anti-shade ability, even may form hot spot, cause assembly to damage, system reliability is low, greatly reduce the effciency of energy transfer of system, be also difficult to the state information obtaining each assembly simultaneously.
For above-mentioned shortcoming, document is had to point out to adopt AC module formula structure.So-called AC module formula structure is that each photovoltaic module is equipped with a Miniature inverter (MI), forms an AC module, is then parallel on ac bus.Although this structure can overcome other structure heat resistanceheat resistant spot and shade ability, power mismatch, be difficult to effectively realize the problem of MPPT maximum power point tracking (MPPT), but owing to being parallel on ac bus after each AC module inversion, thus each AC module all needs to consider cutting-in control problem, there is the deficiencies such as cutting-in control complexity, cost is high, reliability is low.
For above-mentioned deficiency, existing document is pointed out to adopt DC Module formula structure.CN102158094B discloses a kind of photovoltaic generation DC/DC converter and control method thereof, the method is that several DC/AC inverters are connected a high frequency transformer respectively, one end of the secondary side of all high frequency transformers connects together, the other end connects a single-phase diode respectively and realizes rectification, composition photovoltaic generation DC/DC converter.But there is system configuration complexity, control difficult, construction difficulty, high in cost of production problem in this photovoltaic generation DC/DC converter and control method thereof, does not also relate to the communication issue of each converter.
Summary of the invention
Main purpose of the present utility model is: the shortcoming and defect existed for above-mentioned prior art, there is provided structure simple, control flexible and convenient more, be easy to construct, a kind of photovoltaic generating system topological structure based on direct current photovoltaic module of economical, thus easy to utilize.
The utility model solves this technical problem adopted technical scheme: a kind of photovoltaic generating system topological structure based on direct current photovoltaic module, comprises direct current photovoltaic module, GPRS module, DC bus, inverter, energy storage device converter, energy storage device, ac bus, intelligent two-way ammeter, AC load.Described direct current photovoltaic module is connected with described DC bus; Described energy storage device converter one end is connected with described DC bus, and the other end is connected with described energy storage device; Described inverter one end is connected with described DC bus, and the other end is connected with described ac bus; Described AC load is connected with described ac bus; Described intelligence two-way ammeter one end is connected with described ac bus, and the other end is connected with electrical network.
Described direct current photovoltaic module is by photovoltaic module, DC micro converter, communication module forms, described DC micro converter one end is connected with described photovoltaic module, the other end is connected with described DC bus, described DC micro converter is boosting loop, directly the output voltage of described photovoltaic module can be increased to required voltage (as 800V or 400V), it is connected with self control loop, described control loop is connected with described communication module, realize DC boosting, MPPT maximum power point tracking (MPPT) and communication function, the hot spot effect that thorough solution shade etc. are formed, greatly improve generating efficiency.
Further, described direct current photovoltaic modules all in photovoltaic generating system is carried out parallel connection as elementary cell, and is all connected with described DC bus, by power delivery, converge to described DC bus.
Further, described direct current photovoltaic modules all in photovoltaic generating system is divided into some groups; Often group is containing n described direct current photovoltaic module (wherein n≤255) and a described GPRS module, and each described direct current photovoltaic module is all connected with the described GPRS module of this group by its communication module; Described GPRS module and host computer realize radio communication, gather and upload the state information of direct current photovoltaic module, realizing the monitoring and fault diagnosis of direct current photovoltaic module, facilitate system maintenance.
Described energy storage device converter is reversible transducer, realizes management of charging and discharging and the DC bus voltage stabilizing function of energy storage device, and realizes communicating with host computer by RS485 bus.
Described inverter realize DC bus voltage stabilizing and photovoltaic generating system from network operation and the handoff functionality between state that is incorporated into the power networks, and realize communicating with host computer by RS485 bus.
The beneficial effects of the utility model are: 1) output voltage of photovoltaic module is directly increased to required voltage (as 800V or 400V) by direct current photovoltaic module, directly be connected with DC bus, then directly direct current energy is transformed to AC energy by inverter, without the need to header box; 2) adopt wireless and wire communication mode to gather the state information of each direct current photovoltaic module, to realize each direct current photovoltaic module status monitoring and fault diagnosis, facilitate system maintenance; 3) have system reliability high, control flexible and convenient, anti-local shades and assembly electric parameter mismatch ability is strong, energy conversion efficiency is high, the advantage such as applied widely more, thoroughly can solve the hot spot effect that shade etc. is formed, greatly improve the generating efficiency of whole photovoltaic generating system, under achieving any illumination condition, under particularly not mating illumination condition, power generation efficiency of photovoltaic power generation maximizes; 4) structure simple, be easy to construction, economical, easy to utilize, be particularly suitable for distributed photovoltaic power station.
Accompanying drawing explanation
Accompanying drawing is the schematic diagram of the utility model topological structure.
Wherein, 1-direct current photovoltaic module; 2-GPRS module; 3-DC bus; 4-inverter; 5-energy storage device converter; 6-energy storage device; 7-ac bus; The two-way ammeter of 8-intelligence; 9-AC load; 10-AC network.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in drawings, a kind of photovoltaic generating system topological structure based on direct current photovoltaic module of the utility model, comprises direct current photovoltaic module 1, GPRS module 2, DC bus 3, inverter 4, energy storage device converter 5, energy storage device 6, ac bus 7, intelligent two-way ammeter 8, AC load 9.Direct current photovoltaic module 1 is connected with DC bus 3; Energy storage device converter 5 one end is connected with DC bus 3, and the other end is connected with energy storage device 6; One end of inverter 4 is connected with DC bus 3, and the other end is connected with ac bus 7, and direct current energy is transformed to AC energy, and is delivered to ac bus 7; AC load 9 is connected with ac bus 7 and obtains electric energy; One end of the two-way ammeter 8 of intelligence is connected with ac bus 7, and the other end is connected with electrical network 10, realizes the bidirectional measuring of electric energy.First photovoltaic generating system is guaranteed to power to AC load 9, if the energy output of photovoltaic generating system is higher than the power consumption of AC load 9, then unnecessary electric energy can be fed electrical network 10; If energy output is lower than the power consumption of AC load 9, then supplemented by electrical network 10, to AC load 9 feed.
Described direct current photovoltaic module 1 is by photovoltaic module PV, DC micro converter MC, communication module forms, described DC micro converter MC one end is connected with described photovoltaic module PV, the other end is connected with DC bus 3, described DC micro converter MC is boosting loop, directly the output voltage of photovoltaic module PV can be increased to required voltage (as 800V or 400V), it is connected with self control loop, described control loop is connected with described communication module, realize DC boosting, MPPT maximum power point tracking (MPPT) and communication function, the hot spot effect that thorough solution shade etc. are formed, greatly improve systems generate electricity efficiency.
Further, direct current photovoltaic modules 1 all in system is carried out parallel connection as elementary cell, and is all connected with DC bus 3, by power delivery, converge to DC bus 3.
Further, direct current photovoltaic modules 1 all in system are divided into N group; Often group is containing n direct current photovoltaic module 1(wherein n≤255) and a GPRS module 2, each direct current photovoltaic module 1 is all connected with the GPRS module 2 of this group by its communication module; Described GPRS module 2 and host computer realize radio communication, gather and upload the state information of direct current photovoltaic module 1, realizing direct current photovoltaic module 1 monitoring and fault diagnosis, facilitate system maintenance.
Energy storage device converter 5 is reversible transducer, realizes management of charging and discharging and DC bus 3 voltage stabilizing function of energy storage device 6, and realizes communicating with host computer by RS485 bus.
Inverter 4 realize DC bus 3 voltage stabilizing and photovoltaic generating system from network operation and the handoff functionality between state that is incorporated into the power networks, and realize communicating with host computer by RS485 bus.
In addition to the implementation, the utility model can also have other execution mode.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of the utility model requirement.
Claims (5)
1. the photovoltaic generating system topological structure based on direct current photovoltaic module, comprise direct current photovoltaic module, GPRS module, DC bus, inverter, energy storage device converter, energy storage device, ac bus, intelligent two-way ammeter, AC load, it is characterized in that: described direct current photovoltaic module is connected with described DC bus; Described energy storage device converter one end is connected with described DC bus, and the other end is connected with described energy storage device; Described inverter one end is connected with described DC bus, and the other end is connected with described ac bus; Described AC load is connected with described ac bus; Described intelligence two-way ammeter one end is connected with described ac bus, and the other end is connected with electrical network.
2. a kind of photovoltaic generating system topological structure based on direct current photovoltaic module according to claim 1, it is characterized in that: described direct current photovoltaic module is by photovoltaic module, DC micro converter, communication module forms, described DC micro converter one end is connected with described photovoltaic module, the other end is connected with DC bus, described DC micro converter is connected with self control loop, described control loop is connected with described communication module, realize DC boosting, MPPT maximum power point tracking (MPPT) and communication function, the hot spot effect that thorough solution shade is formed, greatly improve generating efficiency.
3. a kind of photovoltaic generating system topological structure based on direct current photovoltaic module according to claim 1, it is characterized in that: described direct current photovoltaic modules all in photovoltaic generating system carries out parallel connection as elementary cell, and be all connected with described DC bus, by power delivery, converge to described DC bus.
4. a kind of photovoltaic generating system topological structure based on direct current photovoltaic module according to claim 1, it is characterized in that: described direct current photovoltaic modules all in system is divided into some groups, often group is containing no more than 255 described direct current photovoltaic modules and a described GPRS module, and each described direct current photovoltaic module is all connected with the described GPRS module of this group by its communication module; Described GPRS module and host computer realize radio communication, gather and upload the state information of direct current photovoltaic module, realizing the monitoring and fault diagnosis of direct current photovoltaic module, facilitate system maintenance.
5. a kind of photovoltaic generating system topological structure based on direct current photovoltaic module according to claim 1, it is characterized in that: described energy storage device converter is reversible transducer, realize management of charging and discharging and the DC bus voltage stabilizing function of energy storage device, and realize communicating with host computer by RS485 bus.
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| CN201520097954.9U CN204465446U (en) | 2015-02-12 | 2015-02-12 | A kind of photovoltaic generating system topological structure based on direct current photovoltaic module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682859A (en) * | 2015-02-12 | 2015-06-03 | 曲阜师范大学 | Topological structure of photovoltaic power generation system based on DC photovoltaic module |
| CN106788140A (en) * | 2017-01-20 | 2017-05-31 | 合肥聚能新能源科技有限公司 | A kind of modularization common DC bus photovoltaic energy storage system |
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2015
- 2015-02-12 CN CN201520097954.9U patent/CN204465446U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682859A (en) * | 2015-02-12 | 2015-06-03 | 曲阜师范大学 | Topological structure of photovoltaic power generation system based on DC photovoltaic module |
| CN106788140A (en) * | 2017-01-20 | 2017-05-31 | 合肥聚能新能源科技有限公司 | A kind of modularization common DC bus photovoltaic energy storage system |
| CN106788140B (en) * | 2017-01-20 | 2018-08-28 | 合肥聚能新能源科技有限公司 | A kind of modularization common DC bus photovoltaic energy storage system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20210212 |