CN220122866U - Reverse active power eliminating device of film assembly photovoltaic power station - Google Patents
Reverse active power eliminating device of film assembly photovoltaic power station Download PDFInfo
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- CN220122866U CN220122866U CN202320964559.0U CN202320964559U CN220122866U CN 220122866 U CN220122866 U CN 220122866U CN 202320964559 U CN202320964559 U CN 202320964559U CN 220122866 U CN220122866 U CN 220122866U
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- photovoltaic
- photovoltaic power
- power generation
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- 238000010248 power generation Methods 0.000 claims abstract description 64
- 238000002955 isolation Methods 0.000 claims abstract description 37
- 230000008030 elimination Effects 0.000 claims abstract description 6
- 238000003379 elimination reaction Methods 0.000 claims abstract description 6
- 238000005286 illumination Methods 0.000 claims description 15
- 239000010408 film Substances 0.000 claims description 13
- 239000010409 thin film Substances 0.000 claims description 10
- 238000009434 installation Methods 0.000 abstract description 4
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a reverse active power elimination device of a film assembly photovoltaic power station, which comprises photovoltaic power generation equipment, a photovoltaic meter connected between a power grid and the photovoltaic power generation equipment and an isolation transformer positioned between the photovoltaic meter and the photovoltaic power generation equipment, wherein the photovoltaic meter is connected with the isolation transformer through a contactor, the contactor is controlled to be opened and closed by a light-operated switch, the light-operated switch is adjacently arranged in an outdoor space where the photovoltaic power generation equipment is positioned, and a light-sensitive regulator and an anti-misoperation delay circuit are arranged on the light-operated switch. The reverse active power elimination device of the film assembly photovoltaic power station can avoid the power loss generated by the isolation transformer when the photovoltaic power generation equipment is in a non-power generation state, and has the advantages of simple structure and convenient installation and connection.
Description
Technical Field
The present utility model relates to a photovoltaic power station, and more particularly, to a photovoltaic power station employing a thin film assembly.
Background
The photovoltaic power station is a power generation system for directly converting solar radiation energy into electric energy by utilizing the photovoltaic effect of a photovoltaic cell assembly, and the commonly used photovoltaic cell assembly comprises a crystalline silicon cell assembly and an amorphous silicon film cell assembly, and the film cell assembly has better weak photovoltaic power generation performance, so that the photovoltaic power station is also applied to a plurality of photovoltaic power stations. In general, the amorphous silicon thin film module requires the negative electrode to be grounded (the negative electrode is grounded to prevent polarization and corrosion), and in the inverter of the photovoltaic power station, the power switching tube is conducted randomly, if no electrical isolation is performed, a certain short circuit occurs between the power grid and the ground, so in the photovoltaic power station adopting the amorphous silicon thin film module, an isolation transformer is required between the ac side and the power grid for safety performance.
Because the isolation transformer is arranged between the alternating current side of the photovoltaic power generation equipment and the power grid, when the photovoltaic power generation equipment is in a non-power generation state, one side winding of the isolation transformer connected with the power grid is still connected with the power grid voltage, the isolation transformer is in a dry running state, reverse active power of the photovoltaic meter is caused, corresponding power loss is caused, and the isolation transformer is damaged for a long time.
The time control device is adopted in the early stage and the contactor is added, the contactor is controlled to be closed and opened through the set time, so that the isolation transformer is disconnected from the power grid in the period that the photovoltaic power generation equipment does not generate electricity, but the time control cannot ensure that the on-off time controlled by the isolation transformer is consistent with the power generation period of the photovoltaic power generation equipment, and the use effect is not ideal. The Chinese patent No. CN201820979033.9 provides a solution scheme of 'a device for controlling the on-off of an isolation transformer matched with a photovoltaic power generation system and the photovoltaic power generation system', wherein a voltage comparison circuit is adopted to control the on-off of a switching device according to the voltage generated by a component in the photovoltaic power generation equipment so as to control the on-off of the isolation transformer and a power grid.
Disclosure of Invention
Aiming at the defects existing in the prior art, the technical problem to be solved by the utility model is to provide the reverse active power elimination device of the film assembly photovoltaic power station, which can avoid the power loss generated by the isolation transformer when the photovoltaic power generation equipment is in a non-power generation state, and has the advantages of simple structure and convenient installation and connection.
In order to solve the technical problems, the reverse active power elimination device of the film assembly photovoltaic power station comprises photovoltaic power generation equipment, a photovoltaic meter connected between a power grid and the photovoltaic power generation equipment and an isolation transformer positioned between the photovoltaic meter and the photovoltaic power generation equipment, wherein the photovoltaic meter is connected with the isolation transformer through a contactor, the contactor is controlled to make and break by a light-operated switch, and the light-operated switch is adjacently arranged in an outdoor space where the photovoltaic power generation equipment is located.
After the technical scheme is adopted, the photovoltaic power generation equipment starts to work to enter a power generation state after solar illumination reaches a certain degree every day, at the moment, the solar illumination simultaneously acts on the illumination induction part of the light-operated switch which is adjacently arranged in an outdoor space where the photovoltaic power generation equipment is located, the light-operated switch is triggered to act, the contactor is controlled to act after the light-operated switch acts to enable the photovoltaic meter and the isolation transformer to be communicated, the photovoltaic power generation equipment is connected with a power grid through the isolation transformer and the photovoltaic meter to transmit power, in the evening, the solar illumination is reduced, the photovoltaic power generation equipment can not receive enough solar irradiation energy to stop power generation, the illumination induction part of the light-operated switch is triggered to act due to the reduction of illumination intensity, so that the contactor is controlled to disconnect the photovoltaic meter from the isolation transformer, coil windings on two sides of the isolation transformer are not subjected to voltage input, corresponding power loss can not be caused, the photovoltaic meter is not metered to reverse active power again, and in the same way, when the photovoltaic power generation equipment cannot generate power due to insufficient intensity, the fact that the photovoltaic power is insufficient in the cloudy weather, the photovoltaic power generation equipment is connected with the isolation transformer, the photovoltaic meter is controlled to be disconnected from the light-operated, and the power generation equipment is not in the power generation state. In addition, the light-operated switch acts through the illumination of the external space where the induction photovoltaic power generation equipment is located, so that the device for controlling the on-off of the isolation transformer matched with the photovoltaic power generation system and the photovoltaic power generation system are not required to collect the voltage of components in the photovoltaic power generation equipment, and the installation operation such as the connection wire related to the photovoltaic power generation equipment is not required naturally, and the light-operated switch has a simple structure and is convenient to install and connect.
In a preferred embodiment of the utility model, the photovoltaic meter is connected with the isolation transformer through a main contact of a contactor, and the main contact of the contactor is a normally closed contact. By adopting the embodiment, when the main contact of the contactor is in a connection state between the photovoltaic meter and the isolation transformer, the coil of the contactor does not need to be electrified, so that the electric quantity of the photovoltaic power generation equipment is not influenced by the contactor and the light-operated switch even in a fault state.
In another preferred embodiment of the present utility model, the light-operated switch is a switch for turning on or off the output according to the sensed illumination intensity. By adopting the embodiment, the photoresistor in the light-operated switch is subjected to bright light irradiation resistance value in daytime to be reduced, so that a relay coil in the light-operated switch is electrified, a normally-closed contact of the relay is disconnected, a contactor is powered off, the normally-closed contact of the contactor is attracted, the photovoltaic power generation equipment is ensured to be in a power transmission state to a power grid, otherwise, the relay coil in the light-operated switch is powered off, the normally-closed contact of the relay is closed, the contactor is electrified, the normally-closed contact of the contactor is opened, and a main contact of the contactor is in a disconnection state between a photovoltaic meter and an isolation transformer, so that the power loss of the isolation transformer is avoided.
In a further preferred embodiment of the utility model, the photoswitch is provided with a light-sensitive regulator. By adopting the embodiment, the light-operated switch can adjust the illumination intensity when the switch acts through the light-sensitive adjuster to correspond to the illumination intensity when the photovoltaic power generation equipment reaches the power generation state, so that the connection and disconnection between the photovoltaic meter and the isolation transformer are ensured to correspond to the power generation state of the photovoltaic power generation equipment.
In a further preferred embodiment of the present utility model, the photoswitch is provided with an anti-malfunction delay circuit. By adopting the embodiment, accidental lightning or accidental light of a flashlight, an automobile lamp and other light rays can be prevented from irradiating the photosensitive part of the photoswitch or short-time shading of fallen leaves, paper sheets and the like to cause the false switching on and off of the photoswitch, and the photoswitch has strong anti-interference performance.
In another further preferred embodiment of the present utility model, the photovoltaic power generation apparatus is a power generation apparatus employing a thin film module. With the adoption of the embodiment, the reverse active electric quantity of the photovoltaic meter, which is caused by the installation of the isolation transformer, of the photovoltaic power generation equipment adopting the film component can be eliminated.
Drawings
The reverse active power eliminating device of the film assembly photovoltaic power station of the present utility model is further described in detail below with reference to the accompanying drawings and specific examples.
FIG. 1 is a schematic circuit diagram of an embodiment of a thin film module photovoltaic power plant reverse active cancellation device of the present utility model.
In the figure: 1-photovoltaic power generation equipment, a 2-isolation transformer, a 3-contactor, a 31-main contact, a 4-light control switch and a 5-photovoltaic meter.
Detailed Description
In the reverse active power elimination device of the film assembly photovoltaic power station shown in fig. 1, the photovoltaic power generation equipment 1 is solar power generation equipment for generating power by adopting a plurality of photovoltaic assemblies to form an assembly array, the photovoltaic assembly array receives direct current generated by sunlight and is converted into alternating current by an inverter and is conveyed to a power grid through a photovoltaic meter 5, the film assemblies are adopted in the photovoltaic power generation equipment 1, the photovoltaic power generation equipment 1 adopts the film assemblies, the photovoltaic power generation equipment 1 adopting the film assemblies is connected with the power grid through an isolation transformer 2, the isolation transformer 2 is positioned between the photovoltaic meter 5 and the photovoltaic power generation equipment 1, and an isolation switch is arranged between the isolation transformer 2 and the photovoltaic meter 5 so as to facilitate maintenance of the photovoltaic power generation equipment 1. The photovoltaic meter 5 is connected with the isolation transformer 2 through a main contact 31 of the contactor 3, the main contact 31 is preferably a normally closed contact, the contactor 3 is controlled to be opened or closed by a photoswitch 4, the photoswitch 4 is adjacently arranged in an outdoor space where the photovoltaic power generation equipment 1 is positioned, the photoswitch 4 is a switch which can make the output be on or off darkly according to the sensed illumination intensity, a light pipe with a resistance value which changes along with the illumination intensity is usually arranged in the photoswitch 4, and the change of the resistance value of the light pipe enables a relay coil in the photoswitch to be powered on or powered off through a corresponding control circuit, so that the contact of the relay is opened or closed; the light-sensitive regulator is arranged in the light-controlled switch 4, and can regulate the illumination intensity required by the power supply or the power failure of the relay coil in the light-controlled switch 4 to be corresponding to the illumination intensity when the photovoltaic power generation equipment 1 reaches the power generation state; the light-operated switch 4 is also internally provided with an anti-misoperation delay circuit so as to prevent accidental lightning or flashlight, automobile lamp and other light rays from irradiating the photosensitive part of the light-operated switch 4 or short shading caused by fallen leaves, paper sheets and the like from being turned on or off by mistake; the photoswitch 4 is preferably a general product which can be purchased in the market, such as a photoswitch for controlling a street lamp, and is an outdoor waterproof product, and can be a self-made product; the control device composed of the light-operated switch 4 and the contactor 3 is connected with the power supply nearby through the switch.
The foregoing is merely illustrative of some preferred embodiments of the present utility model, but the utility model is not limited thereto and many modifications and variations are possible. Any modifications or variations which are based on the basic principles of the present utility model should be considered as falling within the scope of the present utility model.
Claims (6)
1. The utility model provides a reverse active power elimination device of film package photovoltaic power plant, includes photovoltaic power generation facility (1), connects photovoltaic strapping table (5) between electric wire netting and photovoltaic power generation facility (1) to and be located isolation transformer (2) between photovoltaic strapping table (5) and photovoltaic power generation facility (1), its characterized in that: the photovoltaic meter (5) is connected with the isolation transformer (2) through the contactor (3), the contactor (3) is controlled to be turned on or off by the light-operated switch (4), and the light-operated switch (4) is adjacently arranged in an outdoor space where the photovoltaic power generation equipment (1) is located.
2. The thin film component photovoltaic power plant reverse active power abatement device of claim 1, wherein: the photovoltaic meter (5) is connected with the isolation transformer (2) through a main contact (31) of the contactor (3), and the main contact (31) of the contactor (3) is a normally closed contact.
3. The thin film component photovoltaic power plant reverse active power abatement device of claim 1, wherein: the light-operated switch (4) is a switch which can make the output dark on and bright off according to the sensed illumination intensity.
4. A thin film component photovoltaic power plant reverse active cancellation device according to claim 1 or 3, characterized in that: the light-operated switch (4) is provided with a light-sensitive regulator.
5. A thin film component photovoltaic power plant reverse active cancellation device according to claim 1 or 3, characterized in that: the light-operated switch (4) is provided with an anti-misoperation delay circuit.
6. The thin film component photovoltaic power plant reverse active power abatement device of claim 1, wherein: the photovoltaic power generation device (1) is a power generation device adopting a film assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320964559.0U CN220122866U (en) | 2023-04-25 | 2023-04-25 | Reverse active power eliminating device of film assembly photovoltaic power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320964559.0U CN220122866U (en) | 2023-04-25 | 2023-04-25 | Reverse active power eliminating device of film assembly photovoltaic power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220122866U true CN220122866U (en) | 2023-12-01 |
Family
ID=88915139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320964559.0U Active CN220122866U (en) | 2023-04-25 | 2023-04-25 | Reverse active power eliminating device of film assembly photovoltaic power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220122866U (en) |
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2023
- 2023-04-25 CN CN202320964559.0U patent/CN220122866U/en active Active
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