CN211209310U - Three-phase inverter based on inverse control integration - Google Patents
Three-phase inverter based on inverse control integration Download PDFInfo
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- CN211209310U CN211209310U CN201922263312.2U CN201922263312U CN211209310U CN 211209310 U CN211209310 U CN 211209310U CN 201922263312 U CN201922263312 U CN 201922263312U CN 211209310 U CN211209310 U CN 211209310U
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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
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The utility model discloses a three-phase inverter based on inverse control integration, which relates to the technical field of photovoltaic off-grid three-phase power generation, and comprises a photovoltaic panel, a storage battery, a three-phase commercial power supply and three working modes, and further comprises a photovoltaic controller module which is used for controlling the input of photovoltaic energy of the photovoltaic panel; the DC/AC converter is used for converting the direct current processed by the photovoltaic controller module and the direct current of the storage battery into alternating current required by a load; the commercial power bypass module is used for switching commercial power to supply power to a load or charge a storage battery. The utility model discloses combine three-phase inverter and photovoltaic controller together, and support the complementary input of commercial power, still support unbalanced three-phase area to carry, have the three kinds of mode that can freely switch of commercial power priority mode, battery priority mode and energy-conserving mode simultaneously to reach the intellectuality of photovoltaic off-grid three-phase power generation system, provide systematic compatibility greatly, satisfy different users' power demand, reduce system cost.
Description
Technical Field
The utility model relates to photovoltaic is from net three-phase power generation technical field, in particular to three-phase inverter based on it is integrative to contrary accuse.
Background
In the field of traditional solar photovoltaic off-grid three-phase power generation, a solar photovoltaic off-grid three-phase power generation system generally comprises a solar photovoltaic module, a photovoltaic controller, a three-phase inverter, a storage battery pack and the like. The working mode is generally as follows: when the photovoltaic energy is sufficient, the photovoltaic supplies power to the load and charges the battery; when the photovoltaic energy is insufficient, the load is powered by the photovoltaic and the battery together; when the photovoltaic does not have the power generation energy, the battery supplies power to the load, and when the photovoltaic does not have the power generation energy and the battery does not have the power, the whole system is shut down, and the load cannot be used. However, the solar photovoltaic off-grid three-phase power generation system has the following problems:
1. the photovoltaic controller and the three-phase inverter are separated (namely, a photovoltaic controller and a three-phase inverter are needed), and the method has the disadvantages of complicated field wiring and more required cables.
2. The traditional three-phase inverter in the system does not support the complementary input of commercial power (or a diesel and gasoline generator), when the photovoltaic in the system does not have power generation energy and the battery does not have power, the whole system is shut down, the load cannot be used, and the intellectualization cannot be realized.
Therefore, it is necessary to solve the above problems by a reverse control integrated three-phase inverter.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a three-phase inverter based on it is integrative to contrary accuse to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a three-phase inverter based on it is integrative to reverse accuse, includes photovoltaic board, battery, three-phase commercial power and three kinds of mode, still includes:
the photovoltaic controller module is used for controlling the input of photovoltaic energy of the photovoltaic panel;
the DC/AC converter is used for converting the direct current processed by the photovoltaic controller module and the direct current of the storage battery into alternating current required by a load;
the commercial power bypass module is used for switching commercial power to supply power to a load or charge a storage battery;
the DSP digital processor module is used for overall control of the working states of the photovoltaic controller module, the DC/AC converter and the commercial power bypass module;
the three working modes are set to be a battery priority mode, a commercial power priority mode and an energy-saving mode.
Preferably, the connecting end of the DSP digital processor module is provided with a display/external communication module for display and communication.
Preferably, the utility power bypass module is set as a relay or an SCR thyristor and related control circuit.
Preferably, the DC/AC converter comprises a power converter and a transformer;
the power converter comprises an A-phase power module, a B-phase power module and a C-phase power module;
the transformer comprises an A-phase transformer, a B-phase transformer and a C-phase transformer.
Preferably, the power converter is an IGBT module or a field effect transistor MOSFET.
Preferably, the power converter and the transformer are provided in three.
Preferably, the DC/AC converter is configured as a bidirectional converter.
Preferably, the photovoltaic controller module is a photovoltaic MPPT controller or a photovoltaic PWM controller.
The utility model discloses a technological effect and advantage:
1. the utility model combines the three-phase inverter and the photovoltaic controller together, supports the complementary input of commercial power, supports the unbalanced three-phase load, and has three freely switchable working modes of commercial power priority mode, battery priority mode and energy-saving mode simultaneously, so as to achieve the intellectualization of the photovoltaic off-grid three-phase power generation system, greatly provide the compatibility of the system, satisfy the power consumption requirements of different users, and reduce the system cost;
2. the utility model discloses a DSP digital processor module overall control is handled for its output phase difference 120 realizes the output of three-phase electricity, and owing to be three independent power converter and transformer, consequently, this system supports 100% unbalanced three-phase area and carries, independent power return circuit, makes the system compatibility wider, and the area carries the ability stronger, and stability is better.
Drawings
FIG. 1 is a system framework diagram of the present invention.
Fig. 2 is a schematic diagram of the electrical circuit of the present invention.
Fig. 3 is a working flow chart of the invention when the photovoltaic energy is sufficient.
Fig. 4 is a working flow chart of the photovoltaic energy shortage of the invention.
Fig. 5 is a flow chart of the operation of the photovoltaic power generation system of the invention when the photovoltaic power generation system does not generate power and the storage battery is not powered.
Fig. 6 is a flow chart of the operation of the invention when the photovoltaic capacity is sufficient and the storage battery is dead.
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.
The utility model provides a three-phase inverter based on it is integrative to contrary accuse as shown in fig. 1-6, including photovoltaic board, battery, three-phase commercial power and three kinds of mode, still include:
the photovoltaic controller module is used for controlling the input of photovoltaic energy of the photovoltaic panel;
the DC/AC converter is used for converting the direct current processed by the photovoltaic controller module and the direct current of the storage battery into alternating current required by a load;
the commercial power bypass module is used for switching commercial power to supply power to a load or charge a storage battery;
the DSP digital processor module is used for overall control of the working states of the photovoltaic controller module, the DC/AC converter and the commercial power bypass module;
the three working modes are set to be a battery priority mode, a commercial power priority mode and an energy-saving mode.
And a display/external communication module for display and communication is arranged at the connecting end of the DSP module.
The utility power bypass module is set to be a relay or SCR silicon controlled rectifier and related control circuit, and when the relay or the SCR silicon controlled rectifier are closed, the system is powered by the three-phase utility power bypass.
The DC/AC converter comprises a power converter and a transformer; the power converter comprises an A-phase power module, a B-phase power module and a C-phase power module; the transformer comprises an A-phase transformer, a B-phase transformer and a C-phase transformer.
The power converter is an IGBT module or a field effect transistor MOSFET.
The power converter and the transformer are all provided with three. Control through DSP digital processor module overall planning is handled for its output phase difference 120 realizes the output of three-phase electricity, and owing to be three independent power converter and transformer, consequently, this system supports 100% unbalanced three-phase area and carries, independent power return circuit, makes the system compatibility wider, and the area carries the ability stronger, and stability is better.
The DC/AC converter is set as a bidirectional converter, and in the commercial power working state, the DSP digital processor module controls the pulse drive DC/AC converter to rectify and convert into direct current to charge the battery.
The photovoltaic controller module is a photovoltaic MPPT controller or a photovoltaic PWM controller.
Through foretell setting, combine three-phase inverter and photovoltaic controller together, and support the complementary input of commercial power, still support unbalanced three-phase area and carry, have commercial power priority mode, battery priority mode and energy-conserving mode three kinds of working modes that can freely switch simultaneously to reach photovoltaic off-grid three-phase power generation system's intellectuality, provide the compatibility of system greatly, satisfy different users' power consumption demand, reduce system cost.
The utility model discloses a theory of operation:
one) when the operation mode is set to the battery priority mode, the operation mode at this time is as follows:
A. when the photovoltaic energy is sufficient, the photovoltaic energy in the photovoltaic panel is controlled by the photovoltaic controller module, then a part of energy is converted by the DC/AC converter and then supplies power to the load, and the redundant energy is used for charging the storage battery (see fig. 3);
B. when the photovoltaic energy is insufficient, the photovoltaic energy and the energy of the storage battery are converted together through a DC/AC converter to supply power to a load (see figure 4);
C. when the photovoltaic power generation energy is not available and the storage battery is not available, the commercial power bypass module is put into operation, and three-phase commercial power supplies power to the load through the commercial power bypass module (see fig. 5);
D. when the photovoltaic has power generation energy but the storage battery is insufficient in electric quantity, the commercial power bypass module is put into operation, three-phase commercial power supplies power to the load through the commercial power bypass module, and the photovoltaic energy charges the battery (see fig. 6);
E. when the photovoltaic energy is full of the storage battery, the system is automatically switched back to the storage battery inversion mode from the mains supply bypass power supply mode, in the working mode, the photovoltaic energy is preferentially used, when the photovoltaic energy and the storage battery are insufficient, the three-phase mains supply is automatically switched to work, the load is continuously supplied with power, and the intellectualization of the solar photovoltaic off-grid three-phase power generation system is realized;
second) when the working mode is set to be the mains supply priority mode, the working mode at this time is as follows:
F. the three-phase mains supply supplies power to the load through the mains supply bypass module, and the photovoltaic energy is controlled by the photovoltaic controller module and then is fully charged to the storage battery (see fig. 6);
G. when the three-phase commercial power is abnormal, after the photovoltaic energy is controlled by the photovoltaic controller module, part of the energy is converted by the DC/AC converter and then supplies power to the load, and the redundant energy charges the storage battery (see fig. 3);
H. when the photovoltaic energy is insufficient, the photovoltaic energy and the energy of the storage battery are converted together through a DC/AC converter to supply power to a load (see figure 4);
I. when the mains supply is recovered to be normal, the system is automatically switched to a mains supply bypass to supply power to the load, in the working mode, the load of the technical scheme preferentially uses the mains supply energy, and when the three-phase mains supply is powered off, the storage battery is used as the final supplementary power supply, the method can be suitable for places with frequent power failure, the system is used as a backup power supply, the charging times of the storage battery are greatly reduced, and the service life of the storage battery is prolonged to the maximum extent;
and thirdly) when the working mode is set to be the energy-saving mode, when the inverter works in the inversion state, the DSP module can collect the current condition of the output load, and if the inverter does not receive the load, the inverter can be in the standby state, so that the energy waste of the photovoltaic and the storage battery is avoided (because the inverter has empty load loss during no-load operation), and when the load is detected, the inverter is automatically turned on again to realize the energy-saving effect.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (8)
1. The utility model provides a three-phase inverter based on it is integrative to reverse accuse, includes photovoltaic board, battery, three-phase commercial power and three kinds of mode, its characterized in that still includes:
the photovoltaic controller module is used for controlling the input of photovoltaic energy of the photovoltaic panel;
the DC/AC converter is used for converting the direct current processed by the photovoltaic controller module and the direct current of the storage battery into alternating current required by a load;
the commercial power bypass module is used for switching commercial power to supply power to a load or charge a storage battery;
the DSP digital processor module is used for overall control of the working states of the photovoltaic controller module, the DC/AC converter and the commercial power bypass module;
the three working modes are set to be a battery priority mode, a commercial power priority mode and an energy-saving mode.
2. The inverter of claim 1, wherein the inverter comprises: and a display/external communication module for display and communication is arranged at the connecting end of the DSP module.
3. The inverter of claim 1, wherein the inverter comprises: the commercial power bypass module is set to be a relay or SCR silicon controlled rectifier and related control circuit.
4. The inverter of claim 1, wherein the inverter comprises: the DC/AC converter comprises a power converter and a transformer;
the power converter comprises an A-phase power module, a B-phase power module and a C-phase power module;
the transformer comprises an A-phase transformer, a B-phase transformer and a C-phase transformer.
5. The inverter of claim 4, wherein the inverter comprises: the power converter is an IGBT module or a field effect transistor MOSFET.
6. The inverter of claim 4, wherein the inverter comprises: the power converter and the transformer are all provided with three.
7. The inverter of claim 1, wherein the inverter comprises: the DC/AC converter is configured as a bidirectional converter.
8. The inverter of claim 1, wherein the inverter comprises: the photovoltaic controller module is a photovoltaic MPPT controller or a photovoltaic PWM controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922263312.2U CN211209310U (en) | 2019-12-16 | 2019-12-16 | Three-phase inverter based on inverse control integration |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922263312.2U CN211209310U (en) | 2019-12-16 | 2019-12-16 | Three-phase inverter based on inverse control integration |
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| CN211209310U true CN211209310U (en) | 2020-08-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994679A (en) * | 2019-12-16 | 2020-04-10 | 广东欣顿电源科技有限公司 | Three-phase inverter based on inverse control integration and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994679A (en) * | 2019-12-16 | 2020-04-10 | 广东欣顿电源科技有限公司 | Three-phase inverter based on inverse control integration and control method thereof |
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