CN215300522U - Single-phase and three-phase parallel operation circuit for 110V photovoltaic inverter - Google Patents

Single-phase and three-phase parallel operation circuit for 110V photovoltaic inverter Download PDF

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CN215300522U
CN215300522U CN202120041659.7U CN202120041659U CN215300522U CN 215300522 U CN215300522 U CN 215300522U CN 202120041659 U CN202120041659 U CN 202120041659U CN 215300522 U CN215300522 U CN 215300522U
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phase
circuit
switch
capacitor
parallel operation
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周杨
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Shenzhen Tiandepu Energy Storage Technology Co ltd
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Shenzhen Kingsako Electric Co ltd
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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
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • 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 110V photovoltaic inverter is with single-phase and three-phase parallel operation circuit, it includes main control unit, single-phase and three-phase parallel operation system and the rectification system that steps up, main control unit with single-phase and three-phase parallel operation system and the rectification system that steps up connect, the rectification system that steps up is equipped with boost rectifier circuit, boost rectifier circuit is equipped with sharing current circuit, single-phase and three-phase parallel operation system are equipped with changes switch circuit. The utility model discloses a set up main control unit, single-phase and three-phase parallel operation system and boost the rectification system and realize the free fast switch-over to single-phase or three-phase output of photovoltaic inverter to carry out remote control through being equipped with remote control at main control unit, realize remote control, reduce artifical intensity of labour and cost.

Description

Single-phase and three-phase parallel operation circuit for 110V photovoltaic inverter
Technical Field
The utility model relates to a photovoltaic inverter circuit's technical field, concretely relates to 110V photovoltaic inverter is with single-phase and three-phase parallel operation circuit.
Background
Energy is a power source for human development to live, and with the rapid development of the world, the demand of human for energy is increasing day by day. The increasing exhaustion of fossil energy sources such as petroleum and coal and the adverse effect on the environment make people urgently need to develop novel green renewable energy sources. Solar photovoltaic inverters are receiving more and more attention as a device for converting solar energy into electric energy. At present, a three-phase and single-phase inversion output structure is widely adopted in a photovoltaic inverter. Most photovoltaic inverters are only suitable for a single-phase or three-phase system, and can not be freely switched between the single phase and the three phase, so that great limitation is brought to subsequent use and management; and when high-power three-phase and single-phase different types of loads need to be switched, the loads are easily mismatched with the photovoltaic inverter, the capacity of the inverter is wasted or overloaded, the service performance and efficiency of the photovoltaic inverter are influenced, and the service life of the photovoltaic inverter is influenced. Meanwhile, in the product research and development process, as photovoltaic inverter manufacturers usually develop different products aiming at two different systems of single phase and three phase, the product research and development cost is increased, and the application range of the product is also reduced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a to present technique not enough, provide a 110V photovoltaic inverter is with single-phase and three-phase parallel operation circuit.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is:
the utility model provides a 110V photovoltaic inverter is with single-phase and three-phase parallel operation circuit, single-phase and three-phase parallel operation circuit include main control unit, single-phase and three-phase parallel operation system and boost rectifier system, main control unit with single-phase and three-phase parallel operation system and boost rectifier system are connected, boost rectifier system is equipped with boost rectifier circuit, boost rectifier circuit is equipped with sharing current circuit, single-phase and three-phase parallel operation system are equipped with changes switch circuit.
In a further improvement, the single-phase and three-phase parallel operation system comprises a direct-current power supply Vdc, a capacitor C1, a capacitor C2, a first bridge arm circuit, a second bridge arm circuit, a third bridge arm circuit, a filter inductor Lfa, a filter inductor Lfb, a filter inductor Lfc, a capacitor Cfa, a capacitor Cfb and a capacitor Cfc.
In a further refinement, the first leg circuit comprises: the diode is connected with the insulated gate bipolar transistor Q1 in parallel, the diode is connected with the insulated gate bipolar transistor Q2 in parallel, and the source electrode of the insulated gate bipolar transistor Q1 is connected with the drain electrode of the insulated gate bipolar transistor Q2; the second leg circuit includes: the diode is connected with the insulated gate bipolar transistor Q3 in parallel, the diode is connected with the insulated gate bipolar transistor Q4 in parallel, and the source electrode of the insulated gate bipolar transistor Q3 is connected with the drain electrode of the insulated gate bipolar transistor Q4; the third bridge arm circuit includes: the insulated gate bipolar transistor Q5 and a diode connected in parallel with the insulated gate bipolar transistor Q6 and a diode connected in parallel with the insulated gate bipolar transistor Q6 are connected, and the source electrode of the insulated gate bipolar transistor Q5 and the drain electrode of the insulated gate bipolar transistor Q6 are connected.
In a further improvement, the capacitor C1 is connected in series with the capacitor C2 and then connected in parallel with the dc power supply Vdc, the first bridge arm circuit, the second bridge arm circuit and the third bridge arm circuit, and the output terminal a, the output terminal B and the output terminal C are respectively led out from the midpoint a of the first bridge arm circuit, the midpoint B of the second bridge arm circuit and the midpoint C of the third bridge arm circuit through the filter inductor Lfa, the filter inductor Lfb and the filter inductor Lfc.
In a further improvement, the change-over switch circuit includes a switch S1, a switch S2 and a switch S3, the switch S1 is disposed between the output terminal a and the capacitor Cfa, the switch S2 is disposed between the output terminal B and the capacitor Cfb, the switch S3 is disposed between the output terminal C and the capacitor Cfc, the switch S1, the switch S2 and the switch S3 are all connected to the main control unit, when the single-phase and three-phase parallel operation circuit is applied to three-phase output, the main control unit controls the switch S1, the switch S2 and the switch S3 to be closed and closed, so that the output terminal a, the output terminal B and the output terminal C are respectively connected to the capacitor Cfa, the capacitor Cfb and the capacitor Cfc, and when the single-phase and three-phase parallel operation circuit is applied to single-phase output, the main control unit controls the switch S1, the switch S2 and the switch S3 to be opened.
In a further improvement, the boost rectifying circuit comprises an output end Vout, an input end Vin, an input filter capacitor C3, a filter capacitor C4, an output filter capacitor C5, a first rectifying diode D1, a second rectifying diode D2, a third rectifying diode D3, a fourth rectifying diode D4, a power switch tube S, a first power inductor L1 and a second power inductor L2.
In a further improvement, the output terminal Vout is connected to the output filter capacitor C5, the input terminal Vin is connected to the input filter capacitor C3, the input terminal Vin is connected to the input terminal of the main control unit and a power supply, and the output terminal Vout is connected to the single-phase and three-phase parallel operation systems.
In a further improvement, the third rectifier diode D3 is connected in series with the power switch tube S and then connected in parallel in the middle of the boost rectifier circuit, one end of the filter capacitor C4 is connected with one end of the power switch tube S, the other end of the filter capacitor C4 is connected with the anode of the first rectifier diode D1, the third rectifier diode D3 is connected in series with the power switch tube S, the first rectifier diode D1 is connected in series with the second rectifier diode D2, the second power inductor L2 is connected in series with the fourth rectifier diode D4 and the output filter capacitor C5, the first power inductor L1 is connected in series with the input filter capacitor C3, and the first rectifier diode D1 and the second rectifier diode D2 are connected in series and then connected in parallel between the first power inductor L1 and the input filter capacitor C3 to form a current sharing circuit.
The improved structure is characterized in that the main control unit is a single chip microcomputer control unit and is provided with a remote control module.
The utility model has the advantages that: the utility model discloses a set up main control unit, single-phase and three-phase parallel operation system and boost the rectification system and realize the free fast switch-over to single-phase or three-phase output of photovoltaic inverter to carry out remote control through being equipped with remote control at main control unit, realize remote control, reduce artifical intensity of labour and cost. The utility model discloses realize simply, the compatibility is strong, is applicable to single-phase and three-phase system, can be used for high-power occasion, great expansion photovoltaic inverter's application range, improved the reusability of device, the effectual product development cost that has reduced. The utility model discloses a set up boost rectifier circuit and carry out active power factor regulating circuit, can effectively reduce the harmonic of inverter circuit input side, optimize the electric energy quality, carry out the optimization of electric current through setting up the apportionment current circuit, improve the optimization rate of electric quantity greatly, improve the electric energy availability factor.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
Fig. 1 is a schematic diagram of a single-phase and three-phase parallel operation circuit module for a 110V photovoltaic inverter of the present embodiment;
FIG. 2 is a schematic circuit diagram of the boost rectifying system of the present embodiment;
fig. 3 is a circuit schematic diagram of the single-phase and three-phase parallel operation system of the embodiment.
In the figure: 1. the system comprises a single-phase parallel machine circuit and a three-phase parallel machine circuit, 2, a main control unit, 3, a single-phase parallel machine system and a three-phase parallel machine system, 4, a boost rectifying system, 40, a boost rectifying circuit, 400, a current sharing circuit, 30, a switching circuit changing circuit and 20, and a remote control module.
Detailed Description
The following description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention.
In an embodiment, referring to fig. 1 to 3, a single-phase and three-phase parallel operation circuit 1 for a 110V photovoltaic inverter includes a main control unit 2, a single-phase and three-phase parallel operation system 3 and a boost rectification system 4, the main control unit 2 is connected with the single-phase and three-phase parallel operation system 3 and the boost rectification system 4, the boost rectification system 4 is provided with a boost rectification circuit 40, the boost rectification circuit 40 is provided with a shared current circuit 400, and the single-phase and three-phase parallel operation system 3 is provided with a change switch circuit 30.
The single-phase and three-phase parallel operation system 3 comprises a direct-current power supply Vdc, a capacitor C1, a capacitor C2, a first bridge arm circuit, a second bridge arm circuit, a third bridge arm circuit, a filter inductor Lfa, a filter inductor Lfb, a filter inductor Lfc, a capacitor Cfa, a capacitor Cfb and a capacitor Cfc.
The first leg circuit includes: the diode is connected with the insulated gate bipolar transistor Q1 in parallel, the diode is connected with the insulated gate bipolar transistor Q2 in parallel, and the source electrode of the insulated gate bipolar transistor Q1 is connected with the drain electrode of the insulated gate bipolar transistor Q2; the second leg circuit includes: the diode is connected with the insulated gate bipolar transistor Q3 in parallel, the diode is connected with the insulated gate bipolar transistor Q4 in parallel, and the source electrode of the insulated gate bipolar transistor Q3 is connected with the drain electrode of the insulated gate bipolar transistor Q4; the third bridge arm circuit includes: the insulated gate bipolar transistor Q5 and a diode connected in parallel with the insulated gate bipolar transistor Q6 and a diode connected in parallel with the insulated gate bipolar transistor Q6 are connected, and the source electrode of the insulated gate bipolar transistor Q5 and the drain electrode of the insulated gate bipolar transistor Q6 are connected.
The capacitor C1 is connected with the capacitor C2 in series and then connected with the direct-current power supply Vdc, the first bridge arm circuit, the second bridge arm circuit and the third bridge arm circuit in parallel, and the output terminal A, the output terminal B and the output terminal C are led out from a first bridge arm circuit midpoint a, a second bridge arm circuit midpoint B and a third bridge arm circuit midpoint C through the filter inductor Lfa, the filter inductor Lfb and the filter inductor Lfc.
The change switch circuit 30 includes a switch S1, a switch S2, and a switch S3, the switch S1 is disposed between the output terminal a and the capacitor Cfa, the switch S2 is disposed between the output terminal B and the capacitor Cfb, the switch S3 is disposed between the output terminal C and the capacitor Cfc, the switch S1, the switch S2, and the switch S3 are all connected to the main control unit, when the single-phase and three-phase parallel operation circuit 1 is applied to three-phase output, the main control unit 2 controls the switch S1, the switch S2, and the switch S3 to be turned on, so that the output terminal a, the output terminal B, and the output terminal C are turned on with the capacitor Cfa, the capacitor Cfb, and the capacitor Cfc, respectively, and when the single-phase and three-phase parallel operation circuit 1 is applied to single-phase output, the switch 2 controls the switch S1, the switch S2, and the switch S3 to be turned off.
The boost rectifying circuit 40 comprises an output end Vout, an input end Vin, an input filter capacitor C3, a filter capacitor C4, an output filter capacitor C5, a first rectifying diode D1, a second rectifying diode D2, a third rectifying diode D3, a fourth rectifying diode D4, a power switch tube S, a first power inductor L1 and a second power inductor L2.
The output terminal Vout is connected to the output filter capacitor C5, the input terminal Vin is connected to the input filter capacitor C3, the input terminal Vin is connected to the input terminal of the main control unit 2 and a power supply, and the output terminal Vout is connected to the single-phase and three-phase parallel operation system 3.
The third rectifier diode D3 is connected in series with the power switch tube S and then connected in parallel between the boost rectifier circuit, one end of the filter capacitor C4 is connected with one end of the power switch tube S, the other end of the filter capacitor C4 is connected with the anode of the first rectifier diode D1, the third rectifier diode D3 is connected in series with the power switch tube S, the first rectifier diode D1 is connected in series with the second rectifier diode D2, the second power inductor L2 is connected in series with the fourth rectifier diode D4 and the output filter capacitor C5, the first power inductor L1 is connected in series with the input filter capacitor C3, and the first rectifier diode D1 and the second rectifier diode D2 are connected in series and then connected in parallel between the first power inductor L1 and the input filter capacitor C3 to form a shared current circuit.
The main control unit 2 is a single chip microcomputer control unit, and the main control unit 2 is provided with a remote control module 20.
The utility model discloses a set up main control unit, single-phase and three-phase parallel operation system and boost the rectification system and realize the free fast switch-over to single-phase or three-phase output of photovoltaic inverter to carry out remote control through being equipped with remote control at main control unit, realize remote control, reduce artifical intensity of labour and cost. The utility model discloses realize simply, the compatibility is strong, is applicable to single-phase and three-phase system, can be used for high-power occasion, great expansion photovoltaic inverter's application range, improved the reusability of device, the effectual product development cost that has reduced. The utility model discloses a set up boost rectifier circuit and carry out active power factor regulating circuit, can effectively reduce the harmonic of inverter circuit input side, optimize the electric energy quality, carry out the optimization of electric current through setting up the apportionment current circuit, improve the optimization rate of electric quantity greatly, improve the electric energy availability factor.
The utility model discloses a theory of operation: when single-phase output is needed, the main control unit controls the switch S1, the switch S2 and the switch S3 to be disconnected, the load is in short circuit with the output terminal A, the output terminal B and the output terminal C, when three-phase output is needed, the remote control module feeds back signals to the main control unit, the main control unit drives the switch S1, the switch S2 and the switch S3 to be closed, the output terminal A, the output terminal B and the output terminal C are respectively connected with the capacitor Cfa, the capacitor Cfb and the capacitor Cfc, and meanwhile, the boost rectification system is driven to perform boost rectification to the input power supply, and then the three phases are transmitted to the load for use.
The utility model discloses be not limited to above-mentioned embodiment, adopt and the utility model discloses the same or approximate structure or device of above-mentioned embodiment, and the other that obtain is used for 110V photovoltaic inverter to use single-phase and three-phase parallel operation circuit, all is within the protection scope of the utility model.

Claims (9)

1. The utility model provides a 110V photovoltaic inverter is with single-phase and three-phase parallel operation circuit which characterized in that: the single-phase and three-phase parallel operation circuit comprises a main control unit, a single-phase and three-phase parallel operation system and a boosting rectification system, wherein the main control unit is connected with the single-phase and three-phase parallel operation system and the boosting rectification system, the boosting rectification system is provided with a boosting rectification circuit, the boosting rectification circuit is provided with a sharing current circuit, and the single-phase and three-phase parallel operation system is provided with a change switch circuit.
2. The single-phase and three-phase parallel operation circuit for the 110V photovoltaic inverter according to claim 1, wherein: the single-phase and three-phase parallel operation system comprises a direct-current power supply Vdc, a capacitor C1, a capacitor C2, a first bridge arm circuit, a second bridge arm circuit, a third bridge arm circuit, a filter inductor Lfa, a filter inductor Lfb, a filter inductor Lfc, a capacitor Cfa, a capacitor Cfb and a capacitor Cfc.
3. The single-phase and three-phase parallel operation circuit for the 110V photovoltaic inverter according to claim 2, wherein: the first leg circuit includes: the diode is connected with the insulated gate bipolar transistor Q1 in parallel, the diode is connected with the insulated gate bipolar transistor Q2 in parallel, and the source electrode of the insulated gate bipolar transistor Q1 is connected with the drain electrode of the insulated gate bipolar transistor Q2; the second leg circuit includes: the diode is connected with the insulated gate bipolar transistor Q3 in parallel, the diode is connected with the insulated gate bipolar transistor Q4 in parallel, and the source electrode of the insulated gate bipolar transistor Q3 is connected with the drain electrode of the insulated gate bipolar transistor Q4; the third bridge arm circuit includes: the insulated gate bipolar transistor Q5 and a diode connected in parallel with the insulated gate bipolar transistor Q6 and a diode connected in parallel with the insulated gate bipolar transistor Q6 are connected, and the source electrode of the insulated gate bipolar transistor Q5 and the drain electrode of the insulated gate bipolar transistor Q6 are connected.
4. The single-phase and three-phase parallel operation circuit for the 110V photovoltaic inverter according to claim 3, wherein: the capacitor C1 is connected with the capacitor C2 in series and then connected with the direct-current power supply Vdc, the first bridge arm circuit, the second bridge arm circuit and the third bridge arm circuit in parallel, and the output terminal A, the output terminal B and the output terminal C are led out from a first bridge arm circuit midpoint a, a second bridge arm circuit midpoint B and a third bridge arm circuit midpoint C through the filter inductor Lfa, the filter inductor Lfb and the filter inductor Lfc.
5. The single-phase and three-phase parallel operation circuit for the 110V photovoltaic inverter according to claim 4, wherein: the change switch circuit comprises a switch S1, a switch S2 and a switch S3, wherein the switch S1 is arranged between the output terminal A and the capacitor Cfa, the switch S2 is arranged between the output terminal B and the capacitor Cfb, the switch S3 is arranged between the output terminal C and the capacitor Cfc, the switch S1, the switch S2 and the switch S3 are all connected with the main control unit, when the single-phase and three-phase parallel machine circuit is applied to three-phase output, the main control unit controls the switch S1, the switch S2 and the switch S3 to be closed and turned on, so that the output terminal A, the output terminal B and the output terminal C are respectively connected with the capacitor Cfa, the capacitor Cfb and the capacitor Cfc, and when the single-phase and three-phase parallel machine circuit is applied to single-phase output, the main control unit controls the switch S1, the switch S2 and the switch S3 to be turned off.
6. The single-phase and three-phase parallel operation circuit for the 110V photovoltaic inverter according to claim 5, wherein: the boost rectifying circuit comprises an output end Vout, an input end Vin, an input filter capacitor C3, a filter capacitor C4, an output filter capacitor C5, a first rectifying diode D1, a second rectifying diode D2, a third rectifying diode D3, a fourth rectifying diode D4, a power switch tube S, a first power inductor L1 and a second power inductor L2.
7. The single-phase and three-phase parallel operation circuit for the 110V photovoltaic inverter according to claim 6, wherein: the output end Vout is connected with the output filter capacitor C5, the input end Vin is connected with the input filter capacitor C3, the input end Vin is connected with the input end of the main control unit and a power supply, and the output end Vout is connected with the single-phase and three-phase parallel operation system.
8. The single-phase and three-phase parallel operation circuit for the 110V photovoltaic inverter according to claim 7, wherein: the third rectifier diode D3 is connected in series with the power switch tube S and then connected in parallel between the boost rectifier circuit, one end of the filter capacitor C4 is connected with one end of the power switch tube S, the other end of the filter capacitor C4 is connected with the anode of the first rectifier diode D1, the third rectifier diode D3 is connected in series with the power switch tube S, the first rectifier diode D1 is connected in series with the second rectifier diode D2, the second power inductor L2 is connected in series with the fourth rectifier diode D4 and the output filter capacitor C5, the first power inductor L1 is connected in series with the input filter capacitor C3, and the first rectifier diode D1 and the second rectifier diode D2 are connected in series and then connected in parallel between the first power inductor L1 and the input filter capacitor C3 to form a shared current circuit.
9. The single-phase and three-phase parallel operation circuit for the 110V photovoltaic inverter according to claim 8, wherein: the main control unit is a single chip microcomputer control unit and is provided with a remote control module.
CN202120041659.7U 2021-01-08 2021-01-08 Single-phase and three-phase parallel operation circuit for 110V photovoltaic inverter Active CN215300522U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120041659.7U CN215300522U (en) 2021-01-08 2021-01-08 Single-phase and three-phase parallel operation circuit for 110V photovoltaic inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120041659.7U CN215300522U (en) 2021-01-08 2021-01-08 Single-phase and three-phase parallel operation circuit for 110V photovoltaic inverter

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CN215300522U true CN215300522U (en) 2021-12-24

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Effective date of registration: 20230331

Address after: 518000 608, Building C, Hexi Huanggangling Industrial Park, Hangcheng Industrial Zone, Taoyuan Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong Province

Patentee after: Shenzhen Tiandepu Energy Storage Technology Co.,Ltd.

Address before: 518000 room 605, building C, huanggangling Industrial Park, Hangcheng Industrial Zone, Taoyuan community, Xixiang street, Bao'an District, Shenzhen City, Guangdong Province

Patentee before: SHENZHEN KINGSAKO ELECTRIC CO.,LTD.

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