CN204206014U - A kind of 3KW photovoltaic combining inverter - Google Patents
A kind of 3KW photovoltaic combining inverter Download PDFInfo
- Publication number
- CN204206014U CN204206014U CN201420655946.7U CN201420655946U CN204206014U CN 204206014 U CN204206014 U CN 204206014U CN 201420655946 U CN201420655946 U CN 201420655946U CN 204206014 U CN204206014 U CN 204206014U
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- diode
- electrical network
- power tube
- bus capacitor
- switching tube
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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 kind of 3KW photovoltaic combining inverter, comprise boost inductance, diode, switching tube, photovoltaic array, bus capacitor, power tube, body diode, electrical network, one end of described boost inductance connects photovoltaic array, one end is connected with diode and switching tube, the side of described switching tube is provided with the bus capacitor of burning voltage, the side of described bus capacitor is provided with power tube and body diode, described electrical network is positioned at the side of power tube, and inverting output terminal is connected in parallel by relay and electrical network.The utility model adopts two-stage type structure, small in volume, also can start when illumination is weak, achieve making full use of of when low-light energy, be applicable to family to use, can save electric energy greatly, this inverter can have wall-hanging interface simultaneously, save floor space, there is autoboot function.
Description
Technical field
The utility model relates to inverter field, is specially a kind of 3KW photovoltaic combining inverter.
Background technology
Inverter is that direct current energy is transformed into alternating current, is widely used in, on air-conditioning, home theater, electric wheel, electric tool, computer, TV, playing an important role in all trades and professions.But volume is excessive, delivery efficiency is low puzzlement that present inverter also exists, is generally vertical shape, if placed in the family, takes up space very much, and there is no the function of autoboot, need people manually opened, bringing a lot of trouble for using inverter.
Utility model content
The technical problem that the utility model solves is to provide a kind of 3KW photovoltaic combining inverter, to solve the problem.
The technical problem that the utility model solves realizes by the following technical solutions:
A kind of 3KW photovoltaic combining inverter, comprise boost inductance, diode, switching tube, photovoltaic array, bus capacitor, power tube, body diode, electrical network, one end of described boost inductance connects photovoltaic array, one end is connected with diode and switching tube, the side of described switching tube is provided with the bus capacitor of burning voltage, the side of described bus capacitor is provided with power tube and body diode, and described electrical network is positioned at the side of power tube, and inverting output terminal is connected in parallel by relay and electrical network.
As preferably, described boost inductance and diode, switching tube constitute booster circuit.
As preferably, described bus capacitor is Large Copacity bus Support Capacitor.
As preferably, described power tube has 4, composition full bridge inverter, and the busbar voltage after boosting is reverse into the industrial frequency AC close with electrical network amplitude sinusoidal wave, inverter bridge power tube respectively carries body diode, composition afterflow protective loop.
As preferably, the workflow of described inverter is: before system starts, system enters wait state, in this condition, system carries out each parameter and control variables initialization, photovoltaic input voltage is carried out after completing initialization, line voltage, the detection of frequency, guarantee that system peripheral variable before startup normal operating conditions meets grid-connected work requirements, if break down, carry out fault type judgement and determine whether enter malfunction, this malfunction is divided into Critical breakdowns and nonessential fault, it is too high that Critical breakdowns mainly comprises photovoltaic input voltage, input current fault, external power grid overcurrent, leakage current, module failure etc., the type fault directly enters malfunction when occurring, but not Critical breakdowns to comprise input voltage too low, line voltage average is too high or too low, when such fault occurs, system turns back to peripheral workload and detects, if all states are normal, start flag bit set, BOOST pressure-increasning state is entered after then judging system operating mode, after pressure-increasning state is normal, system opens inversion, Unipolar SPWM modulation pulsewidth is adopted to make output current real-time tracking output voltage values, realize with homophase is grid-connected frequently, during normal operation, system carries out MPPT, and islanding detect.If emerged in operation failure system will judge to enter which kind of malfunction according to fault type, guarantee system safe and reliable, if system is due to intensity of illumination normal turn-off voluntarily, will reset automatically when intensity of illumination is recovered normal, realize autoboot function, do not need manual operation.
The utility model adopts two-stage type structure, small in volume, compare and adopt the inverter of transformer isolation structure to improve inversion efficiency, driving power adopts inverse-excitation converting structure, wide input voltage range is at about 100V-450V, ensure that and also can to start when illumination is weak, when low-light, energy makes full use of, be applicable to family to use, electric energy can be saved greatly, this inverter can have wall-hanging interface simultaneously, save floor space, there is autoboot function, as long as a normal boot-strap, inverter will realize automatic switching according to lighting change, automatically open for every day without the need to people.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is workflow diagram of the present utility model.
Embodiment
In order to make actualizing technology means of the present utility model, creation characteristic, reach object and effect is easy to understand, below in conjunction with concrete diagram, set forth the utility model further.
As shown in Figure 1-2, a kind of 3KW photovoltaic combining inverter, comprise boost inductance 1, diode 2, switching tube 3, photovoltaic array 4, bus capacitor 5, power tube 6, body diode 7, electrical network 8, one end of described boost inductance 1 connects photovoltaic array 4, one end is connected with diode 2 and switching tube 3, the side of described switching tube 3 is provided with the bus capacitor 5 of burning voltage, the side of described bus capacitor 5 is provided with power tube 6 and body diode 7, described electrical network 8 is positioned at the side of power tube 6, and inverting output terminal is connected in parallel by relay and electrical network 8.
As preferably, described boost inductance 1 and diode 2, switching tube 3 constitute booster circuit.
As preferably, described bus capacitor 5 is Large Copacity bus Support Capacitor.
As preferably, described power tube 6 has 4, composition full bridge inverter, and the busbar voltage after boosting is reverse into the industrial frequency AC close with electrical network amplitude sinusoidal wave, inverter bridge power tube respectively carries body diode 8, composition afterflow protective loop.
As preferably, the workflow of described inverter is: before system starts, system enters wait state, in this condition, system carries out each parameter and control variables initialization, photovoltaic input voltage is carried out after completing initialization, electric current input power value and line voltage frequency detecting, guarantee that system peripheral variable before startup normal operating conditions meets grid-connected work requirements, if break down, carry out fault type judgement and determine whether enter malfunction, this malfunction is divided into Critical breakdowns and nonessential fault, it is too high that Critical breakdowns mainly comprises photovoltaic input voltage, input current fault, external power grid overcurrent, leakage current, module failure etc., the type fault directly enters malfunction when occurring, but not Critical breakdowns to comprise input voltage too low, line voltage average is too high or too low, when such fault occurs, system turns back to peripheral workload and detects, if all states are normal, start flag bit set, BOOST pressure-increasning state is entered after then judging system operating mode, after pressure-increasning state is normal, system opens inversion, Unipolar SPWM modulation pulsewidth is adopted to make output current real-time tracking electrical network, realize with homophase is grid-connected frequently, during normal operation, system carries out MPPT, and islanding detect.If emerged in operation failure system will judge to enter which kind of malfunction according to fault type, guarantee system safe and reliable, if system is due to intensity of illumination normal turn-off voluntarily, will reset automatically when intensity of illumination is recovered normal, realize autoboot function, do not need manual operation.
The utility model adopts two-stage type structure, small in volume, compare and adopt the inverter of transformer isolation structure to improve inversion efficiency, driving power adopts inverse-excitation converting structure, wide input voltage range is at about 100V-450V, ensure that and also can to start when illumination is weak, when low-light, energy makes full use of, be applicable to family to use, can save electric energy greatly, this inverter can have wall-hanging installation simultaneously, saves floor space, have autoboot function, inverter will realize automatic switching according to lighting change.
More than show and describe general principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.Claimed scope of the present utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. a 3KW photovoltaic combining inverter, comprise boost inductance, diode, switching tube, photovoltaic array, bus capacitor, power tube, body diode, electrical network, it is characterized in that: one end of described boost inductance connects photovoltaic array, one end is connected with diode and switching tube, the side of described switching tube is provided with the bus capacitor of burning voltage, the side of described bus capacitor is provided with power tube and body diode, described electrical network is positioned at the side of power tube, and inverting output terminal is connected in parallel by relay and electrical network.
2. a kind of 3KW photovoltaic combining inverter according to claim 1, is characterized in that: described boost inductance and diode, switching tube constitute booster circuit.
3. a kind of 3KW photovoltaic combining inverter according to claim 1, is characterized in that: described bus capacitor is Large Copacity bus Support Capacitor.
4. a kind of 3KW photovoltaic combining inverter according to claim 1, is characterized in that: described power tube has 4, composition full bridge inverter, and inverter bridge power tube respectively carries body diode, composition afterflow protective loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420655946.7U CN204206014U (en) | 2014-11-06 | 2014-11-06 | A kind of 3KW photovoltaic combining inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420655946.7U CN204206014U (en) | 2014-11-06 | 2014-11-06 | A kind of 3KW photovoltaic combining inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204206014U true CN204206014U (en) | 2015-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420655946.7U Expired - Fee Related CN204206014U (en) | 2014-11-06 | 2014-11-06 | A kind of 3KW photovoltaic combining inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204206014U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681895A (en) * | 2017-09-07 | 2018-02-09 | 国网北京市电力公司 | Combined type booster converter and its parameter determination method |
-
2014
- 2014-11-06 CN CN201420655946.7U patent/CN204206014U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681895A (en) * | 2017-09-07 | 2018-02-09 | 国网北京市电力公司 | Combined type booster converter and its parameter determination method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20151106 |
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| EXPY | Termination of patent right or utility model |