CN214205453U - Grid-connected solar photovoltaic power generation equipment - Google Patents
Grid-connected solar photovoltaic power generation equipment Download PDFInfo
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- CN214205453U CN214205453U CN202120208845.5U CN202120208845U CN214205453U CN 214205453 U CN214205453 U CN 214205453U CN 202120208845 U CN202120208845 U CN 202120208845U CN 214205453 U CN214205453 U CN 214205453U
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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 grid-connected solar photovoltaic power generation device, which comprises a solar photovoltaic panel and a singlechip, wherein the solar photovoltaic panel supplies power to the outside through a power generation main control circuit, the power generation main control circuit comprises a triode VT1, and an emitting electrode of the triode is connected with a power supply output end through a voltage stabilizing unit; the voltage stabilizing unit plays a stabilizing role in the power supply output voltage of the solar photovoltaic panel, the three-terminal voltage stabilizer D1 serves as a core element of the voltage stabilizing unit, and the matched resistance-capacitance element plays a good stabilizing role in the output voltage of the triode VT1, so that the power supply output quality is ensured. The solar photovoltaic grid-connected power supply system further comprises a power supply monitoring unit, the power supply monitoring unit monitors the quality of the output current of the solar photovoltaic panel in real time, and when the power supply current is defective, the single chip microcomputer immediately outputs a low-level signal at the power supply control end of the single chip microcomputer, so that the base electrode of the triode VT1 is cut off when power is lost, the power supply output end is closed, grid-connected output is achieved, and the grid-connected power quality is well guaranteed.
Description
Technical Field
The utility model relates to a photovoltaic power generation technical field especially relates to grid-connected type solar photovoltaic power generation equipment.
Background
In an independent photovoltaic power generation system, the core component of the system is a power supply controller which controls the charging of a power grid or other energy storage equipment and the output of electric energy to a load, and has important significance on the working condition of the whole photovoltaic system. The existing grid-connected solar photovoltaic power generation equipment is influenced by working environment, so that the output of photovoltaic power generation is unstable, the supply current of the grid-connected solar photovoltaic power generation equipment fluctuates greatly, and the grid-connected electric energy quality is poor.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, the present invention is directed to a grid-connected solar photovoltaic power generation apparatus.
The technical scheme for solving the problem is as follows: the grid-connected solar photovoltaic power generation equipment comprises a solar photovoltaic panel and a single chip microcomputer, wherein the solar photovoltaic panel supplies power outwards through a power generation main control circuit, the power generation main control circuit comprises a triode VT1, a collector of a triode VT1 is connected with the output end of the solar photovoltaic panel, a base of a triode VT1 is connected with a power supply control end of the single chip microcomputer and is grounded through a capacitor C1, and an emitter of the triode is connected with a power supply output end through a voltage stabilizing unit; the solar photovoltaic panel power supply monitoring system is characterized by further comprising a power supply monitoring unit, wherein the power supply monitoring unit is used for monitoring the power supply current of the solar photovoltaic panel and feeding a monitoring result back to the single chip microcomputer.
Further, the power supply monitoring unit comprises a current sensor for detecting the output current of the solar photovoltaic panel, a pin 1 of the current sensor is connected with an inverting input end of an operational amplifier AR1 and one end of a resistor R6 through a resistor R4, a pin 2 of the current sensor is connected with an inverting input end of the operational amplifier AR1 and one end of a resistor R7 through a resistor R5, the other end of the resistor R7 is grounded, an output end of the operational amplifier AR1 is connected with the other end of a resistor R7, one end of a resistor R8 and a collector of a triode VT2, a base of the triode VT2 is connected with the other end of the resistor R8, one end of a capacitor C4 and a cathode of a zener diode DZ1, an emitter of the triode VT2 is connected with one end of a resistor R9 and the inverting input end of the operational amplifier AR2, the other ends of the capacitor C4 and the resistor R9 are connected with an anode of the zener diode DZ1 in parallel to be grounded, an inverting input end of the operational amplifier 2 is connected with the resistor R10, One end of the R11 and the capacitor C5, the other end of the resistor R10 and the other end of the capacitor C5 are grounded, the other end of the resistor R11 is connected with a +5V power supply, and the output end of the operational amplifier AR2 is connected with the current detection end of the single chip microcomputer.
Further, the voltage stabilizing unit comprises a three-terminal voltage regulator D1, wherein a pin 1 of the three-terminal voltage regulator D1 is connected with one end of a resistor R2, one end of a capacitor C2 and one end of a capacitor C3 and the power supply output end, and is connected with a collector of a triode VT1 through a resistor R1, a pin 3 of the three-terminal voltage regulator D1 is connected with the other end of the resistor R2 and the other end of the capacitor C2 and one end of the resistor R3, and a pin 2 of the three-terminal voltage regulator D1 is connected with the other end of the resistor R2 and the other end of the capacitor C3.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the voltage stabilizing unit plays a stabilizing role in the power supply output voltage of the solar photovoltaic panel, the three-terminal voltage stabilizer D1 serves as a core element of the voltage stabilizing unit, and the matched resistance-capacitance element plays a good stabilizing role in the output voltage of the triode VT1, so that the power supply output quality is ensured.
2. The power supply monitoring unit monitors the output current quality of the solar photovoltaic panel in real time, and when the power supply current is defective, the single chip microcomputer immediately outputs a low level signal at the power supply control end of the single chip microcomputer, so that the base electrode of the triode VT1 is powered off, the power supply output end is closed, grid-connected output is achieved, and the grid-connected power quality is well guaranteed.
Drawings
Fig. 1 is a schematic diagram of the power generation main control circuit of the present invention.
Fig. 2 is a schematic circuit diagram of the power supply monitoring unit of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The grid-connected solar photovoltaic power generation equipment comprises a solar photovoltaic panel and a single chip microcomputer, wherein the solar photovoltaic panel supplies power outwards through a power generation main control circuit, as shown in fig. 1, the power generation main control circuit comprises a triode VT1, a collector of a triode VT1 is connected with an output end of the solar photovoltaic panel, a base of a triode VT1 is connected with a power supply control end of the single chip microcomputer and is grounded through a capacitor C1, and an emitter of the triode is connected with a power supply output end through a voltage stabilizing unit; the solar photovoltaic panel power supply monitoring system is characterized by further comprising a power supply monitoring unit, wherein the power supply monitoring unit is used for monitoring the power supply current of the solar photovoltaic panel and feeding a monitoring result back to the single chip microcomputer.
As shown in fig. 2, the power supply monitoring unit includes a current sensor for detecting the output current of the solar photovoltaic panel, a pin 1 of the current sensor is connected with an inverting input terminal of an operational amplifier AR1 and one end of a resistor R6 through a resistor R4, a pin 2 of the current sensor is connected with an non-inverting input terminal of the operational amplifier AR1 and one end of a resistor R7 through a resistor R5, the other end of the resistor R7 is grounded, an output terminal of the operational amplifier AR1 is connected with the other end of the resistor R7, one end of the resistor R8 and a collector of a transistor VT2, a base of the transistor VT2 is connected with the other end of the resistor R8, one end of a capacitor C4 and a cathode of a zener diode DZ1, an emitter of the transistor VT2 is connected with one end of a resistor R9 and a non-inverting input terminal of the operational amplifier AR2, the other ends of the capacitor C4 and a resistor R9 are connected with an anode of the zener diode DZ1 in parallel to ground, an inverting input terminal of the operational amplifier 2 is connected with the resistor R10, One end of the R11 and the capacitor C5, the other end of the resistor R10 and the other end of the capacitor C5 are grounded, the other end of the resistor R11 is connected with a +5V power supply, and the output end of the operational amplifier AR2 is connected with the current detection end of the single chip microcomputer.
The voltage stabilizing unit comprises a three-terminal voltage stabilizer D1, wherein a pin 1 of the three-terminal voltage stabilizer D1 is connected with one end of a resistor R2, one end of a capacitor C2 and one end of a capacitor C3 and the power supply output end, and is connected with a collector of a triode VT1 through a resistor R1, a pin 3 of the three-terminal voltage stabilizer D1 is connected with the other end of the resistor R2 and the other end of the capacitor C2 and one end of the resistor R3, and a pin 2 of the three-terminal voltage stabilizer D1 is connected with the other end of the resistor R2 and the other end of the capacitor C3.
The utility model discloses a concrete theory of operation does: the power generation master control circuit is used for controlling power supply output of the solar photovoltaic panel, wherein the triode VT1 serves as a control element, a control electrode base of the triode VT1 is connected with the single chip microcomputer, when the output current of the solar photovoltaic panel is normal, a power supply control end P1 of the single chip microcomputer outputs a high level signal, the triode VT1 is conducted, the system continuously supplies power and outputs, and the capacitor C1 plays a stabilizing role in controlling signals of the single chip microcomputer.
The voltage stabilizing unit plays a stabilizing role in the power supply output voltage of the solar photovoltaic panel, wherein the three-terminal voltage stabilizer D1 serves as a core element of the voltage stabilizing unit, and the matched resistance-capacitance element plays a good stabilizing role in the output voltage of the triode VT1, so that the power supply output quality is ensured.
The power supply monitoring unit monitors the quality of the output current of the solar photovoltaic panel in real time, wherein the current sensor J1 samples the working current of the solar photovoltaic panel, and the sampling signal is sent to the operational amplifier AR1 in a differential mode to be amplified, so that common-mode interference is eliminated. The output signal of the operational amplifier AR1 is sent to the triode VT2 for processing, the capacitor C4 and the voltage stabilizing diode DZ1 play a reference stabilizing role for the base voltage of the triode VT2, and the stability of the sampling current output by the triode VT2 is ensured. The processed sampling current is sent to an operational amplifier AR2 for comparison, wherein, a resistor R10 and a resistor R11 form a threshold voltage at the inverting input end of the operational amplifier AR2 by using a resistor voltage division principle, and when the value of the sampling signal is larger than the threshold voltage, namely, the supply current has a defect, the operational amplifier AR2 inverts to output a high level signal. When the current detection end of the single chip receives the high level signal, a low level signal is immediately output at the power supply control end P1 of the single chip, so that the base electrode of the triode VT1 is cut off after losing power, the power supply output end is closed, grid-connected output is realized, and the grid-connected power quality is well ensured.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (3)
1. Grid-connected solar photovoltaic power generation equipment, including solar photovoltaic board and singlechip, its characterized in that: the solar photovoltaic panel supplies power to the outside through a power generation main control circuit, the power generation main control circuit comprises a triode VT1, the collector of a triode VT1 is connected with the output end of the solar photovoltaic panel, the base of the triode VT1 is connected with the power supply control end of the single chip microcomputer and is grounded through a capacitor C1, and the emitter of the triode is connected with the power supply output end through a voltage stabilizing unit; the solar photovoltaic panel power supply monitoring system is characterized by further comprising a power supply monitoring unit, wherein the power supply monitoring unit is used for monitoring the power supply current of the solar photovoltaic panel and feeding a monitoring result back to the single chip microcomputer.
2. The grid-connected solar photovoltaic power plant according to claim 1, characterized in that: the power supply monitoring unit comprises a current sensor for detecting the output current of the solar photovoltaic panel, a pin 1 of the current sensor is connected with an inverting input end of an operational amplifier AR1 and one end of a resistor R6 through a resistor R4, a pin 2 of the current sensor is connected with an non-inverting input end of an operational amplifier AR1 and one end of a resistor R7 through a resistor R5, the other end of the resistor R7 is grounded, an output end of the operational amplifier AR1 is connected with the other end of a resistor R6, one end of a resistor R8 and a collector of a triode VT2, a base of a triode VT2 is connected with the other end of a resistor R8, one end of a capacitor C4 and a cathode of a zener diode DZ1, an emitter of the triode VT2 is connected with one end of a resistor R9 and the non-inverting input end of the operational amplifier AR2, the other ends of the capacitor C4 and a resistor R9 are connected with an anode of the zener diode DZ1 in parallel to be grounded, the inverting input end of the operational amplifier AR2 is connected with a resistor R10 and an end of a capacitor C11, the other ends of the resistor R10 and the capacitor C5 are grounded, the other end of the resistor R11 is connected with a +5V power supply, and the output end of the operational amplifier AR2 is connected with the current detection end of the single chip microcomputer.
3. The grid-connected solar photovoltaic power plant according to claim 2, characterized in that: the voltage stabilizing unit comprises a three-terminal voltage stabilizer D1, a pin 1 of a three-terminal voltage stabilizer D1 is connected with one end of a resistor R2, one end of a capacitor C2 and one end of a capacitor C3 and the power supply output end, and is connected with a collector of a triode VT1 through a resistor R1, a pin 3 of the three-terminal voltage stabilizer D1 is connected with the other end of the resistor R2 and the other end of the capacitor C2 and one end of the resistor R3, and a pin 2 of the three-terminal voltage stabilizer D1 is connected with the other end of the resistor R2 and the other end of the capacitor C3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120208845.5U CN214205453U (en) | 2021-01-26 | 2021-01-26 | Grid-connected solar photovoltaic power generation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120208845.5U CN214205453U (en) | 2021-01-26 | 2021-01-26 | Grid-connected solar photovoltaic power generation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214205453U true CN214205453U (en) | 2021-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120208845.5U Active CN214205453U (en) | 2021-01-26 | 2021-01-26 | Grid-connected solar photovoltaic power generation equipment |
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|---|---|
| CN (1) | CN214205453U (en) |
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2021
- 2021-01-26 CN CN202120208845.5U patent/CN214205453U/en active Active
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