CN216530580U - Control circuit of grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system - Google Patents
Control circuit of grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system Download PDFInfo
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- CN216530580U CN216530580U CN202122990672.XU CN202122990672U CN216530580U CN 216530580 U CN216530580 U CN 216530580U CN 202122990672 U CN202122990672 U CN 202122990672U CN 216530580 U CN216530580 U CN 216530580U
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- mcu
- control circuit
- optical coupler
- power supply
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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 control circuit of a grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system, which comprises an MCU (microprogrammed control unit), an MCU power supply circuit, an optocoupler drive circuit and a relay control circuit, wherein the MCU power supply circuit is used for supplying power to the MCU; the optical coupler driving circuit comprises two-way driving optical coupler chips, wherein the input end of one driving optical coupler chip is connected with a PWM signal end, and the output ends of the two-way driving optical coupler chips are connected with diodes; the relay control circuit comprises two photoelectric couplers connected in parallel, the signal input ends of the two photoelectric couplers are connected with control signals, and the signal output end of the two photoelectric couplers is connected with the relay. The utility model adopts MCU of DSP chip to carry out control integration, and utilizes the design of optical coupling isolation scheme, thus realizing that one control signal can simultaneously control the on-off of two relays, improving the control efficiency and realizing the fast switching of grid connection and off-grid.
Description
Technical Field
The utility model relates to the technical field of photovoltaic energy storage systems, in particular to a control circuit of a grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system.
Background
Grid-connected solar photovoltaic power generation refers to a mode that solar photovoltaic power generation is connected to a national power grid to generate power, and the grid-connected solar photovoltaic power generation is supplemented by the power grid and is characterized in that a storage battery is not needed. However, because the existing new energy power generation systems such as photovoltaic and wind power generation systems are low in reliability and smart power grids are not established, in order to ensure that the power generated by the photovoltaic power generation systems is directly supplied to local loads without being fed to the power grids, a grid-connected and off-grid type photovoltaic energy storage inversion control system needs to be added into the new energy power generation systems, and grid-connected and off-grid operation and grid-connected and off-grid switching are realized at the same time. In order to achieve efficient control of grid-connected and off-grid switching, a control system with good signal transmission performance is required.
Disclosure of Invention
The utility model aims to provide a control circuit of a grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system, so as to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme:
a control circuit of a grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system comprises an MCU (microprogrammed control unit), an MCU power supply circuit, an optocoupler driving circuit and a relay control circuit, wherein the MCU power supply circuit is used for supplying power to the MCU, the MCU power supply circuit, the optocoupler driving circuit and the relay control circuit are all connected with pins of the MCU, the MCU power supply circuit comprises a DC/DC chip AP1510S, and the input end of the MCU power supply circuit is connected with a photovoltaic power supply system;
the optical coupler driving circuit comprises two-way driving optical coupler chips, wherein the input end of one driving optical coupler chip is connected with a PWM signal end, and the output ends of the two-way driving optical coupler chips are connected with diodes; the relay control circuit comprises two photoelectric couplers connected in parallel, the photoelectric couplers are connected with +5V input voltage, the signal input ends of the two photoelectric couplers are connected with control signals, and the signal output end is connected with a relay.
As a further scheme of the utility model: the MCU adopts a DSP chip TMS320F 28069.
As a further scheme of the utility model: the driving optical coupler chip is FOD8342 in model number.
As a further scheme of the utility model: the photocoupler is TLP 127.
Compared with the prior art, the utility model has the beneficial effects that: the utility model adopts MCU of DSP chip to carry out control integration, and utilizes the design of optical coupling isolation scheme, thus realizing that one control signal can simultaneously control the on-off of two relays, improving the control efficiency and realizing the fast switching of grid connection and off-grid.
Drawings
FIG. 1 is a schematic diagram of an MCU power supply circuit of the present invention.
Fig. 2 is a schematic diagram of an optocoupler drive circuit according to the present invention.
Fig. 3 is a schematic diagram of a relay control circuit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, in the embodiment of the utility model, a control circuit of a grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system comprises an MCU, an MCU power supply circuit, an optocoupler drive circuit and a relay control circuit, wherein the MCU power supply circuit is used for supplying power to the MCU, the MCU adopts a DSP chip TMS320F28069, the MCU power supply circuit, the optocoupler drive circuit and the relay control circuit are all connected with pins of the MCU, the MCU power supply circuit is built based on a DC/DC chip AP1510S, and converts +12V provided in a photovoltaic power supply system into +5V and +3.3V, wherein +5V is used for supplying power to a current hall sensor and a reference voltage circuit, +3.3V/DGND is used for supplying power to the DSP chip, and +3.3V/AGND is used for supplying reference voltage to a DSP sampling circuit;
the optical coupling driving circuit comprises a double-path driving optical coupling chip FOD8342, wherein the input end of one driving optical coupling chip is connected with a PWM signal end, and the output end of the double-path driving optical coupling chip is connected with a diode. Meanwhile, the power tube which is switched on and off is driven by a PWM signal, and the driving optocouplers are connected in series, so that the driving consistency is ensured. The output driving signal is clamped by using a diode, so that the power tube is prevented from being damaged by gate-level overvoltage.
The relay control circuit comprises two photoelectric couplers connected in parallel, the model is TLP127, the photoelectric couplers are connected with +5V input voltage, the signal input ends of the two photoelectric couplers are connected with control signals, and the signal output end of the two photoelectric couplers are connected with a relay, so that one control signal can simultaneously control the on-off of the two relays, and the fast switching of grid connection and grid disconnection is realized.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. The utility model provides a control circuit of single-phase photovoltaic energy storage system of grid-connected bimodulus, includes MCU, MCU power supply circuit, opto-coupler drive circuit and relay control circuit, its characterized in that: the MCU power supply circuit is used for supplying power to the MCU, the MCU power supply circuit, the optocoupler driving circuit and the relay control circuit are all connected with the MCU pin, the MCU power supply circuit comprises a DC/DC chip AP1510S, and the input end of the MCU power supply circuit is connected with the photovoltaic power supply system;
the optical coupler driving circuit comprises two-way driving optical coupler chips, wherein the input end of one driving optical coupler chip is connected with a PWM signal end, and the output ends of the two-way driving optical coupler chips are connected with diodes; the relay control circuit comprises two photoelectric couplers connected in parallel, the photoelectric couplers are connected with +5V input voltage, the signal input ends of the two photoelectric couplers are connected with control signals, and the signal output end is connected with a relay.
2. The control circuit of the grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system according to claim 1, wherein: the MCU adopts a DSP chip TMS320F 28069.
3. The control circuit of the grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system according to claim 1, wherein: the driving optical coupler chip is FOD8342 in model number.
4. The control circuit of the grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system according to claim 1, wherein: the photocoupler is TLP 127.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122990672.XU CN216530580U (en) | 2021-12-01 | 2021-12-01 | Control circuit of grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122990672.XU CN216530580U (en) | 2021-12-01 | 2021-12-01 | Control circuit of grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216530580U true CN216530580U (en) | 2022-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122990672.XU Active CN216530580U (en) | 2021-12-01 | 2021-12-01 | Control circuit of grid-connected and off-grid dual-mode single-phase photovoltaic energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216530580U (en) |
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2021
- 2021-12-01 CN CN202122990672.XU patent/CN216530580U/en active Active
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