CN202721616U - Photovoltaic grid-connected inverter control unit energy storage circuit - Google Patents
Photovoltaic grid-connected inverter control unit energy storage circuit Download PDFInfo
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- CN202721616U CN202721616U CN 201220400768 CN201220400768U CN202721616U CN 202721616 U CN202721616 U CN 202721616U CN 201220400768 CN201220400768 CN 201220400768 CN 201220400768 U CN201220400768 U CN 201220400768U CN 202721616 U CN202721616 U CN 202721616U
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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 provides a photovoltaic grid-connected inverter control unit energy storage circuit. The energy storage circuit comprises a full-wave rectifying circuit, a charging loop and a discharging circuit. The full-wave rectifying circuit comprises diodes D1-D4. An input terminal is connected with an anode and a cathode respectively. A capacitor C1 and a load 1 are connected in parallel in an output terminal of the full-wave rectifying circuit. A current-limiting resistor R1 is connected between the output terminal of the full-wave rectifying circuit and a capacitor C2. A discharging diode D5 is connected between the load 1and a load 2. The load 2 is connected in parallel with the capacitor C2. The circuit of the utility model possesses a low voltage crossing function. Cost is low and a service life is long. Maintenance is not needed. Reliable power supply of a grid-connected power generation system control unit during a grid fault can be effectively increased.
Description
Technical field:
The utility model belongs to field of photovoltaic power generation, and particularly a kind of have a photovoltaic combining inverter control unit accumulator.
Background technology:
Along with the continuous exhaustion of petrochemical industry resource and the continuous rising of world energy sources demand, the regenerative resources such as wind energy and solar energy are utilized on a large scale, increasing renewable energy system access industrial electrical network.Because it is unstable that regenerative resource electric power is supplied with, caused very large impact for the safe and stable operation of electrical network.When electrical network breaks down, if the renewable energy system off-grid will further worsen the operation of power networks state, need renewable energy system off-grid not when electrical network generation short trouble this moment badly, and certain meritorious and reactive power support is provided.
At first, will guarantee the control unit continued power of grid-connected system.For guaranteeing during electric network fault, the control unit reliable power supply, grid-connected system adopts UPS(Uninterruptible Power System mostly at present, be uninterrupted power supply) ensure the power supply of control unit, adopt non-maintaining sealed lead acid storage battery as energy storage device because present UPS is general, life-span is about 3 years, operating ambient temperature is required harsh.UPS is because linking to each other with civil power for a long time in addition, and storage battery is in the floating charge state, the maintenance work that also will discharge and recharge at set intervals.These have all increased the later maintenance cost of grid-connected system.
The utility model content:
Technical problem to be solved in the utility model is the problems referred to above that exist for UPS, a kind of photovoltaic combining inverter control unit accumulator has been proposed, has low voltage ride-through function, and cost is low, the life-span is long, non-maintaining, can the Effective Raise electric network fault during the reliable power supply of grid-connected system control unit.
The technical solution adopted in the utility model is that the utility model provides a kind of photovoltaic combining inverter control unit accumulator, this accumulator comprises full-wave rectifying circuit, charge circuit and discharge loop, wherein full-wave rectifying circuit comprises diode D1-D4, its input connects respectively positive pole and negative pole, and capacitor C 1 and load are connected in the output of full-wave rectifying circuit in the lump; Current-limiting resistance R1 is connected between the output and capacitor C 2 of full-wave rectifying circuit, and discharge diode D5 is connected between load one and the load two, load two and capacitor C 2 parallel connections.
Further, described load one and load two are grid-connected system control units.
Further, the capacity of described capacitor C 2 is much larger than the capacity of described capacitor C 1.
Further, diode D5 is not conducting during the normal operation of described accumulator, only has when AC-input voltage reduces diode D5 conducting.
The beneficial effects of the utility model are that this circuit structure is simple, have abandoned traditional lead acid accumulator, cleanliness without any pollution, and cost is low, and the life-span is long, and is non-maintaining, is applicable to complicated abominable power grid environment.
Description of drawings:
Fig. 1 is that the utility model accumulator and load distribute schematic diagram;
Accumulator charging and work schematic diagram when Fig. 2 is the utility model normal operation;
Accumulator discharge schematic diagram when Fig. 3 is the decline of the utility model AC-input voltage.
Embodiment:
As shown in Figure 1, this photovoltaic combining inverter control unit accumulator comprises full-wave rectifying circuit, charge circuit and discharge loop, full-wave rectifying circuit comprises diode D1-D4, input connects respectively L and the N utmost point (positive pole and negative pole), capacitor C 1 and load are connected in the output of full-wave rectifying circuit in the lump, current-limiting resistance R1 is connected between the output and capacitor C 2 of full-wave rectifying circuit, discharge diode D5 is connected on and plays a decoupling function between load one and the load two, diode D5 is not conducting during normal operation, only has when AC-input voltage reduces diode D5 conducting; Load two and capacitor C 2 parallel connections; Load one and load two are grid-connected system control units.Load one consumed power is constant; capacitor C 2 capacity are large and load two instantaneous starting power are large and after starting holding power very little; therefore be connected on after the whole telegram in reply of the all-wave road by resistance R 1; when this circuit start and load two when starting; resistance R 1 plays metering function, can protect input can not transship the normal operation that also can not have influence on simultaneously load one.
As shown in Figure 2, during circuit start, the output current of full-wave rectifying circuit is given on the one hand capacitor C 1 charging and to load one power supply, is given on the one hand capacitor C 2 chargings, and when treating that capacitor C 1 and C2 electric capacity are full of, circuit start is finished.When the load two that instantaneous starting power is larger starts, provide required instantaneous energy by capacitor C 2, voltage segment on the capacitor C 2 descends and is lower than the full-wave rectifying circuit output voltage, full-wave rectifying circuit charges to C2 by resistance R 1, because the power of maintenance work was very little after load two started, the voltage on the capacitor C 2 returns to the voltage levvl before load two starts very soon.Owing to the reverse blocking of diode D5 and the metering function of resistance R 1, the start-up course of load two can not impact the normal operation of load one simultaneously.
As shown in Figure 3, when AC-input voltage descends, full-wave rectifying circuit quits work, load one causes capacitor C 1 voltage drop very fast from capacitor C 1 power taking, it is very little that the work power demand is kept in load two, and the voltage drop on the capacitor C 2 slowly and be higher than capacitor C 1 voltage, diode D5 conducting, capacitor C 2 rapidly to the C1 charging, is kept the work of C1 voltage and load one by diode D5.
In sum, full-wave rectifying circuit with the AC energy rectification be behind the direct current energy to C1 charging and can be by resistance R 1 to the C2 charging, C1 is to load one power supply, C2 is to load two power supplies; The capacity of capacitor C 2 is much larger than the capacity of capacitor C 1, and instantaneous power was very large when load two started, and required electric energy is provided by capacitor C 2, and load two can not cause interference to the work of load one when starting, and required holding power is very little during load two normal operation; When AC-input voltage descends suddenly, voltage on the capacitor C 1 is higher than AC-input voltage, full-wave rectifying circuit quits work, the electric energy that stores on the capacitor C 1 continues to load one power supply, the electric energy minimizing that capacitor C 1 stores causes voltage drop on the capacitor C 1, and capacitor C 2 is charged to capacitor C 1 by diode D5 when giving load two power supplies, replenish electric energy, proof load one and load two normal operation within a certain period of time that capacitor C 1 consumes.
This circuit has low voltage ride-through function owing to adopted electric capacity as energy-storage units, and cost is low, and the life-span is long, and environmental suitability is strong, Maintenance free.Above content is in conjunction with the embodiment further detailed description of the utility model, can not assert that implementation of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (3)
1. photovoltaic combining inverter control unit accumulator, it is characterized in that, this accumulator comprises full-wave rectifying circuit, charge circuit and discharge loop, wherein full-wave rectifying circuit comprises diode D1-D4, its input connects respectively positive pole and negative pole, and capacitor C 1 and load are connected in the output of described full-wave rectifying circuit in the lump; Current-limiting resistance R1 is connected between the output and capacitor C 2 of full-wave rectifying circuit, and discharge diode D5 is connected between load one and the load two, load two and capacitor C 2 parallel connections.
2. accumulator according to claim 1 is characterized in that, described load one and load two are grid-connected system control units.
3. accumulator according to claim 1 is characterized in that, the capacity of described capacitor C 2 is much larger than the capacity of described capacitor C 1.
3, accumulator according to claim 1 is characterized in that, diode D5 is not conducting during the normal operation of described accumulator, only has when AC-input voltage reduces diode D5 conducting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220400768 CN202721616U (en) | 2012-08-13 | 2012-08-13 | Photovoltaic grid-connected inverter control unit energy storage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220400768 CN202721616U (en) | 2012-08-13 | 2012-08-13 | Photovoltaic grid-connected inverter control unit energy storage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202721616U true CN202721616U (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220400768 Expired - Fee Related CN202721616U (en) | 2012-08-13 | 2012-08-13 | Photovoltaic grid-connected inverter control unit energy storage circuit |
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| CN (1) | CN202721616U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600831A (en) * | 2015-01-23 | 2015-05-06 | 南京南瑞继保电气有限公司 | Inverter auxiliary power supply system and method |
-
2012
- 2012-08-13 CN CN 201220400768 patent/CN202721616U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600831A (en) * | 2015-01-23 | 2015-05-06 | 南京南瑞继保电气有限公司 | Inverter auxiliary power supply system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: XU ZHENGGUO Free format text: FORMER OWNER: JIANGSU SOLRUN SCIENCE + TECHNOLOGY CO., LTD. Effective date: 20130521 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130521 Address after: 223800 Taihang Mountain Road, Suyu Economic Development Zone, Jiangsu, Suqian 77, China Patentee after: Xu Zhengguo Address before: 223800 Taihang Mountain Road, Suyu Economic Development Zone, Jiangsu, Suqian 77, China Patentee before: Jiangsu Solrun Science & Technology Co.,Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU SOLRUN SCIENCE + TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: XU ZHENGGUO Effective date: 20131205 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 223800 SUQIAN, JIANGSU PROVINCE TO: 223801 SUQIAN, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131205 Address after: 223801 Taihang Mountain Road, Suyu Economic Development Zone, Jiangsu, Suqian 77, China Patentee after: JIANGSU SOLRUN SCIENCE & TECHNOLOGY Co.,Ltd. Address before: 223800 Taihang Mountain Road, Suyu Economic Development Zone, Jiangsu, Suqian 77, China Patentee before: Xu Zhengguo |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20210813 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |