CN219659666U - Photovoltaic power station voltage control system - Google Patents
Photovoltaic power station voltage control system Download PDFInfo
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- CN219659666U CN219659666U CN202320423285.4U CN202320423285U CN219659666U CN 219659666 U CN219659666 U CN 219659666U CN 202320423285 U CN202320423285 U CN 202320423285U CN 219659666 U CN219659666 U CN 219659666U
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- 238000010248 power generation Methods 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 230000001276 controlling effect Effects 0.000 claims abstract description 17
- 230000001105 regulatory effect Effects 0.000 claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 24
- 230000033228 biological regulation Effects 0.000 claims description 21
- 239000003381 stabilizer Substances 0.000 claims description 10
- 230000006641 stabilisation Effects 0.000 claims description 9
- 238000011105 stabilization Methods 0.000 claims description 9
- 239000000178 monomer Substances 0.000 claims description 8
- 230000011664 signaling Effects 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
Abstract
The utility model discloses a photovoltaic power station voltage control system, which relates to the technical field of voltage control and comprises a photovoltaic power generation module, a voltage control module and a voltage control module, wherein the photovoltaic power generation module is used for generating power through a photovoltaic panel single circuit; the switch control module is used for transmitting electric energy; the intelligent control module is used for signal receiving and module control; the voltage regulating module is used for boosting and stabilizing voltage and reducing and stabilizing voltage and is used for shunting through the shunting circuit; the output module is used for receiving and transmitting electric energy; the temperature detection module is used for detecting temperature, judging over-temperature and controlling the module to work; and the delay control module is used for delaying the disconnection of the electric energy. According to the photovoltaic power station voltage control system, the intelligent control module controls the voltage regulating module to regulate the voltage of the photovoltaic power generation module, the temperature detecting module detects the temperature and controls the shunt circuit to shunt when the temperature exceeds the preset temperature, the working temperature is reduced, and when the temperature exceeds the preset time, the time delay control module cuts off the power supply of the photovoltaic power generation module.
Description
Technical Field
The utility model relates to the technical field of voltage control, in particular to a voltage control system of a photovoltaic power station.
Background
The utility model provides a photovoltaic power plant, refer to a power generation system that utilizes solar energy, adopt special material such as electronic component constitution such as crystalline silicon board, dc-to-ac converter, link to each other with the electric wire netting and carry the photovoltaic power generation system of electric power to the electric wire netting, by more photovoltaic board monomer composition, the photovoltaic board monomer in the current photovoltaic power plant is mostly through single chip microcomputer control, so that realize the steady output of electric energy, then make the electric energy transmission of every photovoltaic board monomer output give the direct current busbar, make the control of photovoltaic board monomer all be limited to the control of single chip microcomputer, and in the in-process of photovoltaic electric energy transmission, the condition that the overheat appears in photovoltaic power generation is easy because factors such as the material of photovoltaic cable or photovoltaic board quality, the single chip microcomputer direct control photovoltaic board monomer stops the power supply, reduce power supply efficiency, therefore need to improve.
Disclosure of Invention
The embodiment of the utility model provides a photovoltaic power station voltage control system for solving the problems in the background technology.
According to an embodiment of the present utility model, there is provided a photovoltaic power station voltage control system including: the device comprises a photovoltaic power generation module, a switch control module, an intelligent control module, a voltage regulation module, an output module, a temperature detection module and a delay control module;
the photovoltaic power generation module is used for providing direct-current electric energy through a photovoltaic panel single circuit in the photovoltaic power station;
the switch control module is connected with the photovoltaic power generation module and is used for transmitting direct current energy output by the photovoltaic power generation module to the voltage regulation module through the relay circuit;
the intelligent control module is connected with the temperature detection module and used for outputting pulse signals and controlling the operation of the voltage regulation module and receiving signals output by the temperature detection module;
the voltage regulating module is connected with the switch control module and the intelligent control module, and is used for controlling the booster circuit to perform DC-DC voltage stabilization regulation through the pulse signal, performing voltage reduction and voltage stabilization treatment on the electric energy output by the booster circuit, and performing shunt treatment on the electric energy output by the booster circuit through the shunt circuit;
the output module is connected with the voltage regulating module and is used for receiving the electric energy output by the voltage regulating module and transmitting the electric energy to the direct current bus;
the temperature detection module is connected with the delay control module and the voltage regulation module, and is used for receiving the electric energy subjected to the voltage reduction and stabilization treatment of the voltage regulation module, detecting the temperature condition of the photovoltaic power generation module through the temperature detection circuit, judging whether the detected temperature signal exceeds a temperature threshold value and outputting a control signal, and controlling the operation of the shunt circuit through the control signal;
the delay control module is connected with the temperature detection module and the switch control module and is used for receiving the control signal and controlling the delay control circuit to enter delay control work and outputting a level signal through the delay control circuit and controlling the relay circuit to work.
Compared with the prior art, the utility model has the beneficial effects that: according to the photovoltaic power station voltage control system, the intelligent control module controls the voltage regulating module to regulate the voltage of electric energy output by the photovoltaic power generation module, the photovoltaic power generation module is powered on to the output module, meanwhile, the temperature detecting module judges the temperature condition of the photovoltaic power generation module, the shunt circuit in the voltage regulating module is controlled to conduct shunt work when the temperature exceeds the temperature, the influence of supply current on the photovoltaic power generation module is reduced, the working temperature is further reduced, and when the temperature exceeds the set delay time, the delay control module controls the switch control module to disconnect the power supply of the photovoltaic power generation module, protection control of the photovoltaic power generation module is achieved, the protection control can work automatically without the control of the intelligent control module, and the working efficiency of the photovoltaic power generation module is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments of the present utility model will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of a photovoltaic power station voltage control system according to an embodiment of the present utility model.
Fig. 2 is a circuit diagram of a photovoltaic power station voltage control system provided by the embodiment of the utility model.
Fig. 3 is a circuit diagram of connection between a delay control module and a switch control module according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In one embodiment, referring to fig. 1, a photovoltaic power plant voltage control system includes: the photovoltaic power generation system comprises a photovoltaic power generation module 1, a switch control module 2, an intelligent control module 3, a voltage regulation module 4, an output module 5, a temperature detection module 6 and a delay control module 7;
specifically, the photovoltaic power generation module 1 is used for providing direct current electric energy through a photovoltaic panel single circuit in a photovoltaic power station;
the switch control module 2 is connected with the photovoltaic power generation module 1 and is used for transmitting direct current energy output by the photovoltaic power generation module 1 to the voltage regulation module 4 through a relay circuit;
the intelligent control module 3 is connected with the temperature detection module 6 and is used for outputting pulse signals and controlling the operation of the voltage regulation module 4 and receiving signals output by the temperature detection module 6;
the voltage regulating module 4 is connected with the switch control module 2 and the intelligent control module 3, and is used for controlling the booster circuit to perform DC-DC voltage stabilization regulation through the pulse signal, performing voltage reduction and voltage stabilization treatment on the electric energy output by the booster circuit, and performing shunt treatment on the electric energy output by the booster circuit through the shunt circuit;
the output module 5 is connected with the voltage regulating module 4 and is used for receiving the electric energy output by the voltage regulating module 4 and transmitting the electric energy to the direct current bus;
the temperature detection module 6 is connected with the delay control module 7 and the voltage regulation module 4, and is used for receiving the electric energy subjected to the voltage reduction and stabilization treatment by the voltage regulation module 4, detecting the temperature condition of the photovoltaic power generation module 1 through the temperature detection circuit, judging whether the detected temperature signal exceeds a temperature threshold value and outputting a control signal, and controlling the operation of the shunt circuit through the control signal;
and the delay control module 7 is connected with the temperature detection module 6 and the switch control module 2 and is used for receiving the control signal and controlling the delay control circuit to enter delay control work and outputting a level signal through the delay control circuit and controlling the relay circuit to work.
In a specific embodiment, the photovoltaic power generation module 1 may use a photovoltaic panel monomer in a photovoltaic power station to perform voltage regulation control to control a protection object, and provide required dc power for a subsequent module, which is not described herein in detail; the switch control module 2 can adopt a relay circuit, and the delay control module 7 controls and controls the transmission of the electric energy of the photovoltaic power generation module 1; the intelligent control module 3 may be, but is not limited to, a single-chip microcomputer, a DSP, and other microcontrollers integrated with a plurality of components such as an arithmetic unit, a controller, a memory, an input/output unit, etc., and implementing functions such as signal processing, data storage, module control, timing control, etc., where voltage regulation control of the photovoltaic power generation module 1 is completed; the voltage regulating module 4 can adopt a voltage boosting circuit, a voltage reducing circuit and a shunt circuit, wherein the voltage boosting circuit is controlled by the intelligent control module 3 to realize voltage boosting control of electric energy output by the photovoltaic power generation module 1, the voltage reducing circuit carries out voltage reducing and stabilizing control on the boosted electric energy, and the shunt circuit carries out shunt voltage reducing treatment on the boosted electric energy; the output module 5 may adopt a dc bus, and is configured to receive the electrical energy output by each photovoltaic panel unit, and interconnect with a power grid, which is not described herein; the temperature detection module 6 can adopt a temperature detection circuit and a temperature judgment circuit, the temperature detection circuit detects the temperature conditions of the photovoltaic power generation module 1 and the power transmission, and the temperature judgment module carries out over-temperature judgment so as to control the operation of the shunt circuit and the delay control module 7; the delay control module 7 can adopt a delay control circuit formed by 555 integrated circuits, and the temperature detection module 6 controls and delays the operation of the switch control circuit.
In another embodiment, referring to fig. 2 and 3, the photovoltaic power generation module 1 includes a photovoltaic panel unit; the switch control module 2 comprises a first relay switch K1-1; the voltage regulating module 4 comprises a first inductor L1, a first power tube Q1, a first diode D1 and a second capacitor C2; the intelligent control module 3 comprises a first controller U1;
specifically, the first end of the photovoltaic panel unit is connected with one end of a first inductor L1 through a first relay switch K1-1, the other end of the first inductor L1 is connected with the drain electrode of a first power tube Q1 and the anode of a first diode D1, the cathode of the first diode D1 is connected with the ground end through a second capacitor C2, the source electrode of the first power tube Q1 and the second end of the photovoltaic panel unit are grounded, and the grid electrode of the first power tube Q1 is connected with the first IO end of a first controller U1.
In a specific embodiment, the first relay switch K1-1 can be a normally closed switch; the first inductor L1, the first power tube Q1, the first diode D1 and the second capacitor C2 form a Boost circuit, the Boost circuit is controlled by the first controller U1, and the first power tube Q1 can be an N-channel enhanced MOS tube; the first controller U1 is optional, but not limited to an ST89C52 single-chip microcomputer and an STM32 single-chip microcomputer.
Further, the voltage regulating module 4 further includes a second power tube Q2, a first resistor R1, a first voltage regulator U2, and a third capacitor C3; the output module 5 comprises a direct current bus;
specifically, the drain electrode of the second power tube Q2 is connected to the anode of the first diode D1, the source electrode of the second power tube Q2 is grounded through a first resistor R1, the gate electrode of the second power tube Q2 is connected to the temperature detection module 6, the dc bus and the input end of the first voltage regulator U2 are both connected to the cathode of the first diode D1, the ground of the first voltage regulator U2 is grounded, the output end of the first voltage regulator U2 is connected to the first end of the third capacitor C3 and the temperature detection module 6, and the second end of the third capacitor C3 is grounded.
In a specific embodiment, the second power tube Q2 may be an N-channel enhancement type MOS tube, and is matched with the first resistor R1 to form a shunt circuit, so as to perform a shunt voltage reduction process on the input electric energy; the first voltage stabilizer U2 may be a 78XX series voltage stabilizer, and the specific model is not limited.
Further, the temperature detection module 6 includes a second resistor R2, a first thermistor RT1, a fourth resistor R4, a third resistor R3, a first comparator A1, a fifth resistor R5, a first switching tube VT1, a sixth resistor R6, a seventh resistor R7, and a first capacitor C1;
specifically, one end of the second resistor R2, one end of the fourth resistor R4 and the collector of the first switching tube VT1 are all connected to the first end of the third capacitor C3, the other end of the second resistor R2 is connected to the in-phase end of the first comparator A1 and one end of the first thermistor RT1, the other end of the fourth resistor R4 is connected to the inverting end of the first comparator A1 and one end of the third resistor R3, the other end of the first thermistor RT1 and the other end of the third resistor R3 are all grounded, the output end of the first comparator A1 is connected to the base of the first switching tube VT1 through the fifth resistor R5, the emitter of the first switching tube VT1 is connected to one end of the seventh resistor R7 and grounded through the sixth resistor R6, and the other end of the seventh resistor R7 is connected to the second IO end of the first controller U1 and grounded through the first capacitor C1.
In a specific embodiment, the first comparator A1 is optional, but is not limited to the LM393 comparator; the fourth resistor R4 and the third resistor R3 form an over-temperature threshold, and are used for comparing with the second resistor R2 and the first thermistor RT 1; the first switch VT1 may be an NPN transistor, which is controlled by the first comparator A1, so as to control the operation of the shunt circuit and the delay control module 7.
Further, the delay control module 7 includes a fourth capacitor C4, an eighth resistor R8, a ninth resistor R9, a second diode D2, a second switching tube VT2, and a first timer U3;
specifically, one end of the fourth capacitor C4, the eighth end of the first timer U3, and the collector of the second switching tube VT2 are all connected to the output end of the first voltage stabilizer U2, the other end of the fourth capacitor C4 is connected to the cathode of the second diode D2, one end of the eighth resistor R8, the sixth end and the second end of the first timer U3, the first end of the first timer U3 is grounded, the anode of the second diode D2 and the other end of the eighth resistor R8 are both grounded, the fourth end of the first timer U3 is connected to the emitter of the second switching tube VT2, the base of the second switching tube VT2 is connected to the emitter of the first switching tube VT1 through the ninth resistor R9, and the third end of the first timer U3 is connected to the switching control module 2.
In a specific embodiment, the first timer U3 may be an NE555 timer, and cooperates with a fourth capacitor C4, an eighth resistor R8 and a second diode D2 to form a delay control circuit, so as to delay and continuously output a high-level signal; the second switching transistor VT2 may be an NPN transistor, which is configured to control the operation of the first timer U3.
Further, the switch control module 2 further comprises a tenth resistor R10, a third switch tube VT3 and a first relay K1;
specifically, the base of the third switching tube VT3 is connected to the third end of the first timer U3 through a tenth resistor R10, the emitter of the third switching tube VT3 is grounded, the collector of the third switching tube VT3 is connected to one end of the first relay K1, and the other end of the first relay K1 is connected to the output end of the first voltage stabilizer U2.
In a specific embodiment, the third switching tube VT3 may be an NPN transistor, configured to control the operation of the first relay K1; the first relay K1 is used for controlling the closing and opening of the first relay switch K1-1.
According to the photovoltaic power station voltage control system, electric energy is output by a photovoltaic panel unit and is transmitted by a first relay switch K1-1, a first controller U1 outputs a pulse signal through a first IO end to control the conduction state of a first power tube Q1, boosting and adjusting processing is achieved, the electric energy is transmitted to a direct-current bus for summarizing, meanwhile, the processed electric energy is subjected to voltage reduction processing through a first voltage stabilizer U2 so as to provide electric energy for a temperature detection module 6, the first comparator A1 conducts over-temperature judgment on the electric potentials output by a second resistor R2, a first thermistor RT1, a fourth resistor R4 and a third resistor R3, when the electric energy is over-temperature, the first comparator A1 controls the first switch tube VT1 to conduct, a second IO end of the first controller U1 receives the over-temperature signal, the conduction of the second power tube Q2 is controlled, the electric energy output by the photovoltaic panel unit is subjected to shunt voltage reduction through the first resistor R1, the temperature reduction is achieved, meanwhile, the first switch tube VT1 controls the second switch tube 2 to conduct, the first resistor R2 and the first resistor R3 is enabled to conduct when the first relay switch U3 enters a certain voltage level, and the first relay switch U3 is still enabled to conduct when the first relay switch U1 is in a certain state, and the first relay switch U3 is enabled to be disconnected, and the first relay switch 1 is enabled to conduct when the electric energy is in a certain state.
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 utility model may be embodied in other specific forms without departing from the spirit or essential characteristics 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 disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. A photovoltaic power station voltage control system is characterized in that,
the photovoltaic power station voltage control system comprises: the device comprises a photovoltaic power generation module, a switch control module, an intelligent control module, a voltage regulation module, an output module, a temperature detection module and a delay control module;
the photovoltaic power generation module is used for providing direct-current electric energy through a photovoltaic panel single circuit in the photovoltaic power station;
the switch control module is connected with the photovoltaic power generation module and is used for transmitting direct current energy output by the photovoltaic power generation module to the voltage regulation module through the relay circuit;
the intelligent control module is connected with the temperature detection module and used for outputting pulse signals and controlling the operation of the voltage regulation module and receiving signals output by the temperature detection module;
the voltage regulating module is connected with the switch control module and the intelligent control module, and is used for controlling the booster circuit to perform DC-DC voltage stabilization regulation through the pulse signal, performing voltage reduction and voltage stabilization treatment on the electric energy output by the booster circuit, and performing shunt treatment on the electric energy output by the booster circuit through the shunt circuit;
the output module is connected with the voltage regulating module and is used for receiving the electric energy output by the voltage regulating module and transmitting the electric energy to the direct current bus;
the temperature detection module is connected with the delay control module and the voltage regulation module, and is used for receiving the electric energy subjected to the voltage reduction and stabilization treatment of the voltage regulation module, detecting the temperature condition of the photovoltaic power generation module through the temperature detection circuit, judging whether the detected temperature signal exceeds a temperature threshold value and outputting a control signal, and controlling the operation of the shunt circuit through the control signal;
the delay control module is connected with the temperature detection module and the switch control module and is used for receiving the control signal and controlling the delay control circuit to enter delay control work and outputting a level signal through the delay control circuit and controlling the relay circuit to work.
2. The photovoltaic power plant voltage control system of claim 1, wherein the photovoltaic power generation module comprises a photovoltaic panel cell; the switch control module comprises a first relay switch; the voltage regulating module comprises a first inductor, a first power tube, a first diode and a second capacitor; the intelligent control module comprises a first controller;
the first end of the photovoltaic panel monomer is connected with one end of a first inductor through a first relay switch, the other end of the first inductor is connected with the drain electrode of a first power tube and the anode of a first diode, the cathode of the first diode is connected with the ground end through a second capacitor, the source electrode of the first power tube and the second end of the photovoltaic panel monomer are grounded, and the grid electrode of the first power tube is connected with the first IO end of a first controller.
3. The photovoltaic power plant voltage control system of claim 2, wherein the voltage regulation module further comprises a second power tube, a first resistor, a first voltage regulator, and a third capacitor; the output module comprises a direct current bus;
the drain electrode of the second power tube is connected with the anode of the first diode, the source electrode of the second power tube is grounded through a first resistor, the grid electrode of the second power tube is connected with the temperature detection module, the direct current bus and the input end of the first voltage stabilizer are both connected with the cathode of the first diode, the grounding end of the first voltage stabilizer is grounded, the output end of the first voltage stabilizer is connected with the first end of the third capacitor and the temperature detection module, and the second end of the third capacitor is grounded.
4. A photovoltaic plant voltage control system according to claim 3, wherein the temperature detection module comprises a second resistor, a first thermistor, a fourth resistor, a third resistor, a first comparator, a fifth resistor, a first switching tube, a sixth resistor, a seventh resistor, and a first capacitor;
one end of the second resistor, one end of the fourth resistor and a collector electrode of the first switching tube are all connected with the first end of the third capacitor, the other end of the second resistor is connected with the same-phase end of the first comparator and one end of the first thermistor, the other end of the fourth resistor is connected with the opposite-phase end of the first comparator and one end of the third resistor, the other end of the first thermistor and the other end of the third resistor are both grounded, the output end of the first comparator is connected with a base electrode of the first switching tube through the fifth resistor, an emitter electrode of the first switching tube is connected with one end of the seventh resistor and grounded through the sixth resistor, and the other end of the seventh resistor is connected with the second IO end of the first controller and grounded through the first capacitor.
5. The photovoltaic power plant voltage control system of claim 4, wherein the delay control module comprises a fourth capacitor, an eighth resistor, a ninth resistor, a second diode, a second switching tube, and a first timer;
one end of the fourth capacitor, the eighth end of the first timer and the collector electrode of the second switching tube are all connected with the output end of the first voltage stabilizer, the other end of the fourth capacitor is connected with the cathode of the second diode, one end of the eighth resistor, the sixth end and the second end of the first timer, the first end of the first timer is grounded, the anode of the second diode and the other end of the eighth resistor are both grounded, the fourth end of the first timer is connected with the emitter electrode of the second switching tube, the base electrode of the second switching tube is connected with the emitter electrode of the first switching tube through the ninth resistor, and the third end of the first timer is connected with the switch control module.
6. The photovoltaic power plant voltage control system of claim 5, wherein the switch control module further comprises a tenth resistor, a third switching tube, and a first relay;
the base of the third switching tube is connected with the third end of the first timer through a tenth resistor, the emitter of the third switching tube is grounded, the collector of the third switching tube is connected with one end of the first relay, and the other end of the first relay is connected with the output end of the first voltage stabilizer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320423285.4U CN219659666U (en) | 2023-03-08 | 2023-03-08 | Photovoltaic power station voltage control system |
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| CN202320423285.4U CN219659666U (en) | 2023-03-08 | 2023-03-08 | Photovoltaic power station voltage control system |
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| CN219659666U true CN219659666U (en) | 2023-09-08 |
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