CN212850413U - Device for adjusting minimum power output of photovoltaic module - Google Patents
Device for adjusting minimum power output of photovoltaic module Download PDFInfo
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- CN212850413U CN212850413U CN202021656358.7U CN202021656358U CN212850413U CN 212850413 U CN212850413 U CN 212850413U CN 202021656358 U CN202021656358 U CN 202021656358U CN 212850413 U CN212850413 U CN 212850413U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses an adjust photovoltaic module minimum power output's device belongs to photovoltaic power generation's technical field, and the device includes: the photovoltaic module comprises a main controller and component output adjusting modules, wherein the number of the component output adjusting modules is equal to that of the photovoltaic modules, each component output adjusting module is connected to two ends of each photovoltaic module in parallel, and each component output adjusting module is connected with the main controller in a wireless communication mode; the main controller is connected between the photovoltaic module and the inverter. The main controller comprises a power supply driving unit, a main control unit, a wireless transceiving unit A, MOS, a transistor Q1, a MOS transistor Q2 and a direct current relay K1. The utility model discloses utilize the dynamic load device to connect in parallel with photovoltaic module, reach the purpose that changes subassembly output through changing the dynamic load state, realize output's regulation fast, and realize the power output minimizing, ensure the reliability of system.
Description
Technical Field
The utility model relates to an adjust photovoltaic module minimum power output's device belongs to photovoltaic power generation's technical field.
Background
The photovoltaic power generation system consists of a direct current power generation array and an alternating current grid connection part, wherein the direct current power generation array is formed by combining photovoltaic solar panels in a series-parallel connection mode. For a photovoltaic system direct current power generation array, two potential safety hazards of direct current high voltage risk and rescue risk exist. In a traditional series system, the voltage of the whole series of components can be accumulated to reach a high voltage of 600V-1500V. The direct current arc discharge phenomenon is easily caused due to the loosening of the joint of the photovoltaic module, poor contact, moisture of the electric wire, insulation breakage and the like, so that a fire disaster is caused. In addition, when a fire accident occurs due to arc discharge or an external cause, a high voltage is always present for the direct current side as long as the lighting assembly generates electricity. The fire fighting work is very dangerous, the fire fighters cannot rescue the scene in time, and the fire behavior can be controlled from a distance.
In this regard, the U.S. national electrical code requires that all building photovoltaic systems be equipped with fast turn-off switchgear. In NEC 690.12 version 2017, a strict requirement is made for fast turn-off again: within 30S after the quick turn-off device is started, the voltage outside the limit range is reduced to be below 30V, and the voltage within the limit range is reduced to be below 80V, namely the requirement of realizing 'component-level turn-off' is met by taking the distance to 305mm of the photovoltaic matrix as a limit.
At present, the main ways for realizing the fast shutdown at the component level include a micro inverter, a shutdown device (RSD), an optimizer and the like, but all have the disadvantages of high cost, complex circuit and structure and the like.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art not enough, provide a device of adjusting photovoltaic module minimum power output, adopt lower cost to realize the regulation to photovoltaic module output power voltage.
The utility model discloses specifically adopt following technical scheme to solve above-mentioned technical problem:
an apparatus for regulating a minimum power output of a photovoltaic module, comprising: the photovoltaic module comprises a main controller and component output adjusting modules, wherein the number of the component output adjusting modules is equal to that of the photovoltaic modules, each component output adjusting module is connected to two ends of each photovoltaic module in parallel, and each component output adjusting module is connected with the main controller in a wireless communication mode; the main controller is connected between the photovoltaic module and the inverter.
Further, as a preferred technical solution of the present invention: the master controller comprises a power supply driving unit, a master control unit, a wireless transceiving unit A, MOS tube Q1, an MOS tube Q2 and a direct current relay K1, wherein the positive electrode of the photovoltaic module is connected with the drain electrode of the MOS tube Q1, the source electrode of the MOS tube Q1 is connected to one end of a normally closed contact A of the direct current relay K1, and the other end of the normally closed contact A of the direct current relay K1 is connected to the inverter; the negative electrode of the photovoltaic module is connected with the drain electrode of an MOS tube Q2, the source electrode of the MOS tube Q2 is connected with one end of a normally closed contact B of a direct current relay K1, and the other end of the normally closed contact B of the direct current relay K1 is connected with the inverter; the grid electrode of the MOS transistor Q1, the grid electrode of the MOS transistor Q2 and the direct current relay K1 are connected to the main control unit; the main control unit is respectively connected with the power supply driving unit and the wireless transceiving unit A.
Further, as a preferred technical solution of the present invention: the main controller further comprises a manual control switch, and the manual control switch is connected with the main control unit.
Further, as a preferred technical solution of the present invention: the module output adjusting module comprises a power supply module, an MOS transistor Q3, a controllable silicon Q4, a resistor R1, an adjusting control unit and a wireless transceiving unit B, wherein the anode and the cathode of the controllable silicon Q4 are connected in parallel to the two ends of the anode and the cathode of the photovoltaic module, and the control end of the controllable silicon Q4 is connected to the source electrode of the MOS transistor Q3; the drain electrode of the MOS tube Q3 is connected with the power supply module, and the grid electrode of the MOS tube Q3 is connected with the adjusting control unit; the resistor R1 is connected between the control end of the thyristor Q4 and the cathode; the adjusting control unit is respectively connected with the power supply module and the wireless transceiving unit B.
The utility model adopts the above technical scheme, can produce following technological effect:
the utility model discloses an adjust photovoltaic module minimum power output's device is an output adjusting module of every subassembly configuration in the photovoltaic module array. The module does not work at ordinary times, the power output of the assembly is not influenced, and the main controller can send an instruction to control the module to start to reduce the output power of the photovoltaic assembly corresponding to the module to be less than 20W and the voltage to be less than 2V under the condition of requirement, so that the voltage of the string is reduced to be less than 80V. After receiving the instruction of the main controller, the module can transmit the instruction to other modules besides the execution instruction, and can also receive the instruction transmitted by other modules, so as to ensure that all the modules in the array receive the instruction of the main controller to the maximum extent. The main controller is arranged between the string and the inverter and plays a role in preventing reverse flow so as to protect the components, the inverter and other equipment besides the control module.
Therefore, the utility model discloses utilize dynamic load device and photovoltaic module parallelly connected, reach the purpose that changes subassembly output through changing the dynamic load state, can realize output's regulation fast, and realize the power output minimizing. The system transmits instructions among all units in a wireless communication mode, and the whole system can be controlled by a remote controller or remote data communication, so that the reliability of the system is ensured.
Drawings
Fig. 1 is the overall architecture diagram of the device for adjusting the minimum power output of the photovoltaic module according to the present invention.
Fig. 2 is a schematic structural diagram of the central controller of the present invention.
Fig. 3 is a schematic structural diagram of the middle module output adjusting module of the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the utility model discloses an adjust photovoltaic module minimum power output's device, the device mainly includes: the photovoltaic module comprises a main controller and component output adjusting modules, wherein the number of the component output adjusting modules is equal to that of the photovoltaic modules, each component output adjusting module is connected to two ends of each photovoltaic module in parallel, and each component output adjusting module is connected with the main controller in a wireless communication mode; the main controller is connected between the photovoltaic module and the inverter, and the main controller can be only used as a control module without being connected into a loop of the string and the inverter.
The utility model discloses well main control unit establishes between photovoltaic module and inverter, through the power supply of AC electric network, a regulation module is exported to the control command and control assembly for accept, its structure is shown in FIG. 2, mainly include power drive unit, the main control unit, wireless transceiver unit A, MOS pipe Q1, MOS pipe Q2, direct current relay K1, wherein the drain electrode of MOS pipe Q1 is connected to photovoltaic module's positive pole, MOS pipe Q1's source electrode is connected on one end of direct current relay K1's normally closed contact A, direct current relay K1's normally closed contact A's the other end is connected to the inverter; the negative electrode of the photovoltaic module is connected with the drain electrode of an MOS tube Q2, the source electrode of the MOS tube Q2 is connected with one end of a normally closed contact B of a direct current relay K1, and the other end of the normally closed contact B of the direct current relay K1 is connected with the inverter; the grid electrode of the MOS transistor Q1, the grid electrode of the MOS transistor Q2 and the direct current relay K1 are connected to the main control unit; the main control unit is respectively connected with the power supply driving unit and the wireless transceiving unit A. The main controller further comprises a manual control switch, and the manual control switch is connected with the main control unit.
Connect through MOS pipe Q1, Q2 and direct current relay K1 between photovoltaic module and the inverter, the utility model discloses well MOS pipe Q1, Q2 also can adopt the IGBT pipe. When the output power of the component needs to be adjusted, a command is given to the main controller through a manual control switch or a wireless communication party such as a remote controller, a mobile phone, a remote control platform and the like. After receiving the instruction, the main controller firstly sends a control signal to turn off the MOS transistors Q1 and Q2, and then turns off the direct current relay K1 after delaying for a period of time, so that the normally closed contact A and the normally closed contact B of the direct current relay K1 are disconnected, and the connection between the photovoltaic module and the inverter is cut off; and then the main control unit sends instructions to all the component output adjusting modules in a group sending mode through the wireless transceiving unit A. The MOS transistors Q1 and Q2 are turned off firstly, and then the direct current relay K1 is turned off, so that the relay is prevented from being turned off when direct current exists, arc discharge occurs, and the photovoltaic module is also prevented from being connected with the inverter.
The utility model discloses well subassembly output regulation module mainly used adjusts photovoltaic module's output voltage, and its structure is shown in fig. 3, mainly includes power module, MOS pipe Q3, silicon controlled rectifier Q4, resistance R1, regulation control unit, wireless transceiver unit B, and wherein the positive negative pole of silicon controlled rectifier Q4 connects in parallel at photovoltaic module's positive negative pole both ends, can control silicon Q4's positive pole and connect photovoltaic module anodal PV +, the negative pole of silicon controlled rectifier Q4 connects photovoltaic module negative pole PV-; the control end G of the controllable silicon Q4 is connected to the source electrode of the MOS tube Q3; the drain electrode of the MOS transistor Q3 is connected with the output end V1 of the power supply module, and the grid electrode of the MOS transistor Q3 is connected with the output end V2 of the regulation control unit; the resistor R1 is connected between the control end G of the thyristor Q4 and the cathode; the adjusting control unit is respectively connected with the power supply module and the wireless transceiving unit B.
The power supply module is used for respectively supplying power to the whole module and driving the controllable silicon Q4 after converting the output voltage of the photovoltaic module; the regulation control unit controls the controllable silicon Q4 through the MOS pipe Q3, and simultaneously receives and forwards the instruction sent by the main controller through the wireless transceiving unit B. Under normal conditions, the MOS transistor Q3 is cut off, the control end G of the controllable silicon Q4 is pulled to a low potential by the resistor R1, and at the moment, the controllable silicon Q4 is not conducted, so that the output of the photovoltaic module is not influenced. When the module output adjusting module receives the instruction, the output end V2 of the adjusting control unit outputs a trigger signal to make the MOS transistor Q3 conduct, the voltage output by the output end V1 of the power supply module is added to the control end G of the thyristor Q4 through the MOS transistor Q3, a positive trigger voltage is formed at the control end G of the thyristor Q4, and the thyristor Q4 conducts. After the thyristor Q4 is switched on, the voltage of the photovoltaic module is reduced to be lower than 2V, the current on the thyristor Q4 is the short-circuit current of the photovoltaic module, the current is far greater than the maintaining current of the thyristor Q4 under the condition of illumination, and the thyristor Q4 can be kept in a switched-on state all the time, so that the output voltage of the photovoltaic module is maintained to be lower than 2V until the illumination disappears. After the illumination disappears, the photovoltaic module does not generate power any more, at the moment, the anode power supply of the controlled silicon Q4 is cut off, the voltage at the two ends of the controlled silicon Q4 automatically restores the turn-off state when the voltage is zero, and the output of the photovoltaic module can restore to normal.
The utility model discloses an output adjusting module is configured for every subassembly in the photovoltaic module array. The module does not work at ordinary times, the power output of the assembly is not influenced, and the main controller can send an instruction to control the module to start to reduce the output power of the photovoltaic assembly corresponding to the module to be lower than 20W and the voltage to be lower than 2V under the condition of requirement, so that the voltage of the photovoltaic assembly string is reduced to be lower than 80V. The module output adjusting module can transmit instructions to other modules besides executing the instructions after receiving the instructions of the main controller, and can also receive the instructions transmitted by other modules, so that all the modules in the array can be ensured to receive the instructions of the main controller to the maximum extent. The main controller is arranged between the photovoltaic module and the inverter and plays a role in preventing reverse flow so as to protect the module, the inverter and other equipment besides the control module. The whole system can be controlled by a remote controller or by remote data communication.
Therefore, the utility model discloses can utilize dynamic load device and photovoltaic module parallelly connected, reach the purpose that changes subassembly output through changing the dynamic load state, adopt silicon controlled switch as the dynamic load device, can realize output's regulation fast, and realize the power output minimizing, ensure the reliability of system.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (4)
1. An apparatus for regulating a minimum power output of a photovoltaic module, comprising: the photovoltaic module comprises a main controller and component output adjusting modules, wherein the number of the component output adjusting modules is equal to that of the photovoltaic modules, each component output adjusting module is connected to two ends of each photovoltaic module in parallel, and each component output adjusting module is connected with the main controller in a wireless communication mode; the main controller is connected between the photovoltaic module and the inverter.
2. The apparatus for regulating the minimum power output of a photovoltaic module of claim 1, wherein: the master controller comprises a power supply driving unit, a master control unit, a wireless transceiving unit A, MOS tube Q1, an MOS tube Q2 and a direct current relay K1, wherein the positive electrode of the photovoltaic module is connected with the drain electrode of the MOS tube Q1, the source electrode of the MOS tube Q1 is connected to one end of a normally closed contact A of the direct current relay K1, and the other end of the normally closed contact A of the direct current relay K1 is connected to the inverter; the negative electrode of the photovoltaic module is connected with the drain electrode of an MOS tube Q2, the source electrode of the MOS tube Q2 is connected with one end of a normally closed contact B of a direct current relay K1, and the other end of the normally closed contact B of the direct current relay K1 is connected with the inverter; the grid electrode of the MOS transistor Q1, the grid electrode of the MOS transistor Q2 and the direct current relay K1 are connected to the main control unit; the main control unit is respectively connected with the power supply driving unit and the wireless transceiving unit A.
3. The apparatus for regulating the minimum power output of a photovoltaic module of claim 2, wherein: the main controller further comprises a manual control switch, and the manual control switch is connected with the main control unit.
4. The apparatus for regulating the minimum power output of a photovoltaic module of claim 1, wherein: the module output adjusting module comprises a power supply module, an MOS transistor Q3, a controllable silicon Q4, a resistor R1, an adjusting control unit and a wireless transceiving unit B, wherein the anode and the cathode of the controllable silicon Q4 are connected in parallel to the two ends of the anode and the cathode of the photovoltaic module, and the control end of the controllable silicon Q4 is connected to the source electrode of the MOS transistor Q3; the drain electrode of the MOS tube Q3 is connected with the power supply module, and the grid electrode of the MOS tube Q3 is connected with the adjusting control unit; the resistor R1 is connected between the control end of the thyristor Q4 and the cathode; the adjusting control unit is respectively connected with the power supply module and the wireless transceiving unit B.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021656358.7U CN212850413U (en) | 2020-08-11 | 2020-08-11 | Device for adjusting minimum power output of photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021656358.7U CN212850413U (en) | 2020-08-11 | 2020-08-11 | Device for adjusting minimum power output of photovoltaic module |
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| CN212850413U true CN212850413U (en) | 2021-03-30 |
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| CN202021656358.7U Expired - Fee Related CN212850413U (en) | 2020-08-11 | 2020-08-11 | Device for adjusting minimum power output of photovoltaic module |
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Granted publication date: 20210330 Termination date: 20210811 |