WO2021142906A1 - Photovoltaic module turn-off apparatus - Google Patents
Photovoltaic module turn-off apparatus Download PDFInfo
- Publication number
- WO2021142906A1 WO2021142906A1 PCT/CN2020/078740 CN2020078740W WO2021142906A1 WO 2021142906 A1 WO2021142906 A1 WO 2021142906A1 CN 2020078740 W CN2020078740 W CN 2020078740W WO 2021142906 A1 WO2021142906 A1 WO 2021142906A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- photovoltaic module
- switch
- terminal
- photovoltaic
- auxiliary power
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
-
- 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
Definitions
- This application relates to the technical field of photovoltaic grid-connected power generation, and in particular to a photovoltaic module shut-off device.
- Fig. 1 is a schematic diagram of the connection of a photovoltaic module switch in the prior art.
- the output end of the photovoltaic module shut-off device is connected to the inverter in series, and the photovoltaic module shut-off device usually has two The switch, set up the switch controller to control the internal switch of the switch to be disconnected, so that the voltage on the DC cable is very low.
- the purpose of this application is to provide a photovoltaic module shutdown device, which is used to save the number of photovoltaic module shutdown devices in a photovoltaic system, thereby saving corresponding devices and reducing costs.
- the present application provides a photovoltaic module shutdown device, including an auxiliary power source, a control module, a switching device, and a series path for connecting a first photovoltaic module and a second photovoltaic module in series;
- the input terminal of the auxiliary power source is connected to the output terminal of the first photovoltaic device or the input terminal of the auxiliary power source is connected to the output terminal of the second photovoltaic module, and the auxiliary power source is connected to the switching device In series;
- the switching device is provided in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module switch or between the second photovoltaic module and the negative output terminal of the photovoltaic module switch At least one of the output path of the first photovoltaic module and the series path between the second photovoltaic module;
- the control module is connected to the control terminal of the switching device, and is used to control the switching of the switching device Off.
- the switching device specifically includes a first switch, a second switch and a third switch
- the first switch is provided in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module switch; the second switch is provided in the first photovoltaic module and the first photovoltaic module. A series path between the two photovoltaic components; the third switch is arranged in the output path between the second photovoltaic component and the negative output terminal of the photovoltaic component switch.
- the positive terminal of the auxiliary power source is connected to the positive terminal of the first photovoltaic module, and the negative terminal of the auxiliary power source is connected to the negative terminal of the first photovoltaic module;
- the terminal is connected to the positive terminal of the auxiliary power supply, the second terminal of the first switch is connected to the positive output terminal of the photovoltaic module switch; the first terminal of the second switch is connected to the negative terminal of the auxiliary power supply ,
- the second terminal of the second switch is connected to the positive terminal of the second photovoltaic module;
- the first terminal of the third switch is connected to the negative terminal of the second photovoltaic module, and the first terminal of the third switch is connected to the negative terminal of the second photovoltaic module.
- the two ends are connected with the negative output end of the photovoltaic module switch.
- the switching device further includes a fourth switch provided between the second terminal of the second switch and the positive terminal of the second photovoltaic component.
- the positive terminal of the auxiliary power source is connected to the positive terminal of the first photovoltaic module, and the negative terminal of the auxiliary power source is connected to the negative terminal of the first photovoltaic module;
- the terminal is connected to the positive terminal of the auxiliary power supply, the second terminal of the first switch is connected to the positive output terminal of the photovoltaic module switch; the first terminal of the second switch is connected to the negative terminal of the auxiliary power supply ,
- the second terminal of the second switch is connected to the positive terminal of the second photovoltaic module;
- the first terminal of the third switch is connected to the positive terminal of the second photovoltaic module, and the third switch is connected to the positive terminal of the second photovoltaic module.
- the negative terminal of the second photovoltaic module is connected.
- the switching device further includes a fifth switch connected in parallel with the third switch.
- the series path for connecting the first photovoltaic module and the second photovoltaic module in series includes the series connection between the first photovoltaic module and one of the second photovoltaic modules A series connection between a passage and each of the second photovoltaic modules;
- one of said series path is provided with one said second switch.
- it also includes a diode
- the anode terminal of the diode is connected with the negative output terminal of the photovoltaic module switch, and the cathode terminal of the diode is connected with the positive output terminal of the photovoltaic module switch.
- the switching device is specifically a MOS tube or an IGBT or a thyristor or a triode or a relay.
- the photovoltaic module shutdown device includes an auxiliary power supply, a control module, a switching device, and a series path for connecting a first photovoltaic module and a second photovoltaic module in series; wherein, the input end of the auxiliary power supply is connected to the first photovoltaic device The output terminal is connected or the input terminal of the auxiliary power supply is connected with the output terminal of the second photovoltaic module, and the auxiliary power supply is connected in series with the switching device; the switching device is located in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module switcher Or at least one of the output path between the second photovoltaic component and the negative output terminal of the photovoltaic component switcher or the series path between the first photovoltaic component and the second photovoltaic component; the control module is connected to the control terminal of the switching device, Used to control the on and off of switching devices.
- the photovoltaic module switch-off provided in this application, it is realized that the first photovoltaic module, the second photovoltaic module and the inverter are disconnected inside the photovoltaic module switch-off device, so that one photovoltaic module switch-off device can control two
- the connection between the photovoltaic module and the inverter compared with the photovoltaic module switch for a single photovoltaic module, greatly reduces the number of electronic devices, reduces the mechanical parts, reduces the product cost, and reduces the power consumption.
- Figure 1 is a schematic diagram of the connection of a photovoltaic module switch in the prior art
- FIG. 2 is a schematic diagram of the connection of a photovoltaic module shutdown device provided by an embodiment of the application;
- FIG. 3 is a circuit diagram of the first photovoltaic module shutdown device provided by an embodiment of the application.
- FIG. 4 is a circuit diagram of a second type of photovoltaic module shutdown device provided by an embodiment of the application.
- FIG. 5 is a schematic diagram of the working state of the photovoltaic module switcher shown in FIG. 4;
- FIG. 6 is a circuit diagram of a third type of photovoltaic module shutdown device provided by an embodiment of the application.
- FIG. 7 is a circuit diagram of a fourth type of photovoltaic module shutdown device provided by an embodiment of the application.
- Fig. 8 is a schematic diagram of the working state of the photovoltaic module switcher shown in Fig. 7;
- FIG. 9 is a schematic diagram of the shutdown state of the photovoltaic module shutdown device shown in FIG. 7;
- FIG. 10 is a schematic diagram of the connection of another photovoltaic module shut-off device provided by an embodiment of the application.
- the core of this application is to provide a photovoltaic module shut-off device, which is used to save the number of photovoltaic module shut-off devices in a photovoltaic system, thereby saving corresponding devices and reducing costs.
- Fig. 2 is a schematic diagram of the connection of a photovoltaic module shut-off device provided by an embodiment of the application.
- the embodiment of the present application provides a photovoltaic module shutdown device that can be connected to multiple photovoltaic modules.
- the photovoltaic module shutdown device As shown in FIG. 2, taking a photovoltaic module shutdown device connected to two photovoltaic modules as an example, the photovoltaic module shutdown device provided by the embodiment of the application is The breaker is connected to the output terminals of the two photovoltaic modules, which can control whether the two photovoltaic modules are connected to the inverter. The output terminals of each photovoltaic module switch-off device are connected in series, and finally connected to the inverter.
- the photovoltaic module switch provided by the embodiment of the present application may include an auxiliary power source, a control module, a switching device, and a series path for connecting the first photovoltaic module and the second photovoltaic module in series;
- the input end of the auxiliary power supply is connected with the output end of the first photovoltaic device or the input end of the auxiliary power supply is connected with the output end of the second photovoltaic module, and the auxiliary power supply is connected in series with the switching device; the switching device is set in the first photovoltaic module and the photovoltaic module.
- the output path between the positive output terminal of the module switch or the output path between the second photovoltaic module and the negative output terminal of the photovoltaic module switch or the series path between the first photovoltaic module and the second photovoltaic module At least one; the control module is connected to the control end of the switching device, and is used to control the on and off of the switching device.
- an output path between the first photovoltaic module and the positive output terminal of the photovoltaic module shutdown device, and the second photovoltaic module and the negative output terminal of the photovoltaic module shutdown device are provided.
- the first photovoltaic module and the second photovoltaic module are connected in series in the photovoltaic module switch-off provided in the embodiment of this application, and the photovoltaic module switch-off provided in the embodiment of this application is further connected in series with other photovoltaic modules, Finally, it is connected to the inverter.
- the switching device can be arranged in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module shut-off device, or it may be arranged in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module shut-off device.
- the output path between the second photovoltaic module and the negative output terminal of the photovoltaic module switch can also be provided in the series path between the first photovoltaic module and the second photovoltaic module.
- the switching device can be a MOS tube, or other devices that can achieve the same function, such as an IGBT, a thyristor, a triode, or a relay.
- the power source of the auxiliary power source comes from the first photovoltaic component or the second photovoltaic component, and is used to supply power to the circuit of the entire photovoltaic component breaker.
- the photovoltaic module shutdown device provided by the embodiment of the present application further includes a diode
- the anode terminal of the diode is connected with the negative output terminal of the photovoltaic module switch, and the cathode terminal of the diode is connected with the positive output terminal of the photovoltaic module switch.
- the photovoltaic module shutdown device includes an auxiliary power supply, a control module, a switching device, and a series path for connecting a first photovoltaic module and a second photovoltaic module in series; wherein, the input terminal of the auxiliary power supply is connected to the first photovoltaic device The output terminal of the auxiliary power supply is connected or the input terminal of the auxiliary power supply is connected with the output terminal of the second photovoltaic module, and the auxiliary power supply is connected in series with the switching device; the switching device is set between the first photovoltaic module and the output terminal of the positive output terminal of the photovoltaic module switch At least one of the output path or the output path between the second photovoltaic module and the negative output terminal of the photovoltaic module switch or the series path between the first photovoltaic module and the second photovoltaic module; the control module is connected to the control terminal of the switching device , Used to control the on-off of switching devices.
- the photovoltaic module switch-off provided in this application, it is realized that the first photovoltaic module, the second photovoltaic module and the inverter are disconnected inside the photovoltaic module switch-off device, so that one photovoltaic module switch-off device can control two
- the connection between the photovoltaic module and the inverter compared with the photovoltaic module switch for a single photovoltaic module, greatly reduces the number of electronic devices, reduces the mechanical parts, reduces the product cost, and reduces the power consumption.
- the switching device specifically includes a first switch, a second switch, and a third switch;
- the first switch is provided in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module switch; the second switch is provided in the series path between the first photovoltaic module and the second photovoltaic module; the third switch The output path is provided between the second photovoltaic module and the negative output terminal of the photovoltaic module switch.
- FIG. 3 is a circuit diagram of the first type of photovoltaic module shut-off device provided by an embodiment of the application
- FIG. 4 is a circuit diagram of a second type of photovoltaic module shut-off device provided by an embodiment of the application
- FIG. 5 is the photovoltaic module shown in FIG. 4 Schematic diagram of the working state of the switch.
- the circuit of a photovoltaic module switch-off provided by the embodiment of the present application is shown in FIG. 3.
- the positive terminal of the auxiliary power source is connected to the positive terminal PV1+ of the first photovoltaic module, and the negative terminal of the auxiliary power source is connected to the first photovoltaic module.
- the negative terminal PV1- of the photovoltaic module is connected; the first terminal of the first switch S1 is connected to the positive terminal of the auxiliary power source, and the second terminal of the first switch S1 is connected to the positive output terminal of the volt module switch; The first terminal is connected to the negative terminal of the auxiliary power supply, the second terminal of the second switch S2 is connected to the positive terminal PV2+ of the second photovoltaic module; the first terminal of the third switch S3 is connected to the negative terminal PV2- of the second photovoltaic module, The second terminal of the third switch S3 is connected to the negative output terminal OUT- of the photovoltaic module switch.
- FIG. 3 is a schematic diagram of the shutdown state of the first photovoltaic module shutdown device provided by the embodiment of the present application.
- the control module controls the first switch S1, the second switch S2, and the third switch S3 to be turned on.
- the control module controls the first switch S1, the second switch S2, and the third switch S3 to turn off, so that the first photovoltaic module and the second photovoltaic module fall off the series path of the entire photovoltaic module, and the first The photovoltaic module is no longer connected to the second photovoltaic module. Even if one of the first switch S1, the second switch S2, and the third switch S3 is faulty, the above-mentioned switching off of the first photovoltaic module and the second photovoltaic module can be realized by disconnecting the other switches.
- the auxiliary power source can be connected to the output end of the first photovoltaic component, or can be connected to the output end of the second photovoltaic component.
- the switching device further includes a fourth switch S4 arranged between the second terminal of the second switch S2 and the positive terminal PV2+ of the second photovoltaic component.
- FIG. 4 is a schematic diagram of the shutdown state of the second photovoltaic module shutdown device provided by an embodiment of the application.
- the working state of the second photovoltaic module shut-off device provided by the embodiment of the present application is shown in FIG. 5.
- FIG. 6 is a circuit diagram of a third type of photovoltaic module shutdown device provided by an embodiment of this application
- FIG. 7 is a circuit diagram of a fourth type of photovoltaic module shutdown device provided by an embodiment of this application
- FIG. 8 is the photovoltaic module shown in FIG. 7 A schematic diagram of the working state of the shutdown device
- FIG. 9 is a schematic diagram of the shutdown state of the photovoltaic module shutdown device shown in FIG. 7.
- the circuit of a photovoltaic module switcher provided by the embodiment of the present application is shown in FIG. 6.
- the positive terminal of the auxiliary power source is connected to the positive terminal PV1+ of the first photovoltaic module, and the negative terminal of the auxiliary power source is connected to the first photovoltaic module.
- the negative terminal PV1- of the photovoltaic module is connected; the first terminal of the first switch S1 is connected to the positive terminal of the auxiliary power source, and the second terminal of the first switch S1 is connected to the positive output terminal OUT+ of the photovoltaic module switch; the second switch S2 The first terminal of the second switch S2 is connected to the negative terminal of the auxiliary power supply, the second terminal of the second switch S2 is connected to the positive terminal PV2+ of the second photovoltaic module; the first terminal of the third switch S3 is connected to the positive terminal PV2+ of the second photovoltaic module, The third switch S3 is connected to the negative terminal PV2- of the second photovoltaic component.
- the control module controls the first switch S1 and the second switch S2 to turn on, and controls the third switch S3 to turn off.
- the control module controls the first switch S1 and the second switch S2 to be turned off to disconnect the connection between the first switch S1 and the positive output terminal OUT+ of the photovoltaic module switch and the first switch S1 and the second switch S1.
- the series connection between the switches S2 controls the third switch S3 to be turned on to short-circuit the second photovoltaic component, so as to turn off the second photovoltaic component.
- the switching device further includes a fifth switch S5 connected in parallel with the third switch S3.
- the fifth switch S5 and the third switch S3 form redundancy, and the control method is the same as that of the third switch S3.
- FIG. 8 The working state of the fourth photovoltaic module shut-off device provided by the embodiment of the present application is shown in FIG. 8, and the shut-off state of the fourth photovoltaic module shutoff device provided in the embodiment of the present application is shown in FIG. 9.
- FIG. 10 is a schematic diagram of the connection of another photovoltaic module shut-off device provided by an embodiment of the application.
- the series path used to connect the first photovoltaic module and the second photovoltaic module in series includes the series path between the first photovoltaic module and one second photovoltaic module and Series paths between the second photovoltaic modules;
- a series path is provided with a second switch S2.
- a second switch may be provided for each serial path S2, it is also possible to provide only one second switch S2 in one series path.
- Fig. 10 taking the number of second photovoltaic modules as two, that is, one photovoltaic module cut-off device is connected to three photovoltaic modules as an example, the photovoltaic module cut-off device provided in the embodiment of the present application and the output of the three photovoltaic modules
- the three photovoltaic modules are connected in series in the photovoltaic module switch, and then the output terminals of each photovoltaic module switch are connected in series, and finally connected to the inverter.
- There are two series paths between the three photovoltaic modules which can correspond to two second switches S2, or only one second switch S2 can be provided on one of the series paths.
Landscapes
- Photovoltaic Devices (AREA)
- Inverter Devices (AREA)
Abstract
A photovoltaic module turn-off apparatus, comprising an auxiliary power supply, a control module, a switching device, and a series path for connecting a first photovoltaic module and a second photovoltaic module in series. The input end of the auxiliary power supply is connected to the output end of the first photovoltaic module or the input end of the auxiliary power supply is connected to the output end of the second photovoltaic module, and the auxiliary power supply is connected in series to the switching device; the switching device is arranged on an output path between the first photovoltaic module and the positive output end of the photovoltaic module turn-off apparatus or on an output path between the second photovoltaic module and the negative output end of the photovoltaic module turn-off apparatus or on the series path between the first photovoltaic module and the second photovoltaic module; the control module is connected to the control end of the switching device and configured to control on/off of the switching device. According to the photovoltaic module turn-off apparatus provided in the present application, connection between two photovoltaic modules and an inverter is controlled by one photovoltaic module turn-off apparatus, and compared with a photovoltaic module turn-off apparatus for a single photovoltaic module, the number of electronic devices is greatly reduced.
Description
本申请要求于2020年1月14日提交中国专利局、申请号为202010036752.9、发明名称为“一种光伏组件关断器”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on January 14, 2020, the application number is 202010036752.9, and the invention title is "a photovoltaic module shut-off device", the entire content of which is incorporated into this application by reference .
本申请涉及光伏并网发电技术领域,特别是涉及一种光伏组件关断器。This application relates to the technical field of photovoltaic grid-connected power generation, and in particular to a photovoltaic module shut-off device.
由于太阳能的可再生性及清洁性,光伏并网发电技术得以迅猛发展。通常的光伏***是多个光伏组件串联形成组串,然后接入逆变器实现直流转换为交流而并网。串联的光伏组件形成直流高压,这种高压会导致人身危险和火灾事故。现场光伏***要求逆变器有防电弧保护,也就是在检测到电弧的时候要马上关断逆变器的运行。但是,即使逆变器停止运行了,光伏组件串起来以后的直流电缆还是会输出高压电,有安全风险。所以最安全的做法是有个控制功能把每个光伏组件的输出电压关断,这样就应该完全消除直流高压。Due to the renewable and clean nature of solar energy, photovoltaic grid-connected power generation technology has developed rapidly. In the usual photovoltaic system, multiple photovoltaic modules are connected in series to form a string, and then connected to an inverter to convert DC to AC and connect to the grid. PV modules connected in series form DC high voltage, which can cause personal hazards and fire accidents. The on-site photovoltaic system requires the inverter to have arc protection, that is, the inverter must be shut down immediately when an arc is detected. However, even if the inverter stops running, the DC cables after the PV modules are connected in series will still output high voltage, which is a safety risk. So the safest way is to have a control function to turn off the output voltage of each photovoltaic module, so that the DC high voltage should be completely eliminated.
图1为现有技术中的光伏组件关断器的连接示意图。Fig. 1 is a schematic diagram of the connection of a photovoltaic module switch in the prior art.
如图1所示,现有技术中通过在每个光伏组件后面加入光伏组件关断器,光伏组件关断器的输出端再串联连接逆变器,光伏组件关断器内部通常设有两个开关,设有关断控制器可以控制关断器内部的开关断开,使直流电缆上电压很低。As shown in Figure 1, in the prior art, by adding a photovoltaic module shut-off device behind each photovoltaic module, the output end of the photovoltaic module shut-off device is connected to the inverter in series, and the photovoltaic module shut-off device usually has two The switch, set up the switch controller to control the internal switch of the switch to be disconnected, so that the voltage on the DC cable is very low.
然而,随着串联的光伏组件的数量的增加,光伏组件关断器的数量随之增加,其中涉及到的电子器件、芯片、线缆等器件更是成倍增长。However, with the increase in the number of photovoltaic modules connected in series, the number of photovoltaic module shutoffs has also increased, and the electronic devices, chips, cables and other devices involved have increased exponentially.
发明内容Summary of the invention
本申请的目的是提供一种光伏组件关断器,用于节省光伏***中光伏组件关断器的数量,进而节省相应的器件,降低成本。The purpose of this application is to provide a photovoltaic module shutdown device, which is used to save the number of photovoltaic module shutdown devices in a photovoltaic system, thereby saving corresponding devices and reducing costs.
为解决上述技术问题,本申请提供一种光伏组件关断器,包括辅助电 源,控制模块,开关器件以及用于串联第一光伏组件和第二光伏组件的串联通路;In order to solve the above technical problems, the present application provides a photovoltaic module shutdown device, including an auxiliary power source, a control module, a switching device, and a series path for connecting a first photovoltaic module and a second photovoltaic module in series;
其中,所述辅助电源的输入端与所述第一光伏器件的输出端连接或所述辅助电源的输入端与所述第二光伏组件的输出端连接,且所述辅助电源与所述开关器件串联;所述开关器件设于所述第一光伏组件与光伏组件关断器的正极输出端之间的输出通路或所述第二光伏组件与所述光伏组件关断器的负极输出端之间的输出通路或所述第一光伏组件和所述第二光伏组件之间的串联通路中的至少一个;所述控制模块与所述开关器件的控制端连接,用于控制所述开关器件的通断。Wherein, the input terminal of the auxiliary power source is connected to the output terminal of the first photovoltaic device or the input terminal of the auxiliary power source is connected to the output terminal of the second photovoltaic module, and the auxiliary power source is connected to the switching device In series; the switching device is provided in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module switch or between the second photovoltaic module and the negative output terminal of the photovoltaic module switch At least one of the output path of the first photovoltaic module and the series path between the second photovoltaic module; the control module is connected to the control terminal of the switching device, and is used to control the switching of the switching device Off.
可选的,所述开关器件具体包括第一开关,第二开关和第三开关;Optionally, the switching device specifically includes a first switch, a second switch and a third switch;
其中,所述第一开关设于所述第一光伏组件与所述光伏组件关断器的正极输出端之间的输出通路;所述第二开关设于所述第一光伏组件和所述第二光伏组件之间的串联通路;所述第三开关设于所述第二光伏组件与所述光伏组件关断器的负极输出端之间的输出通路。Wherein, the first switch is provided in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module switch; the second switch is provided in the first photovoltaic module and the first photovoltaic module. A series path between the two photovoltaic components; the third switch is arranged in the output path between the second photovoltaic component and the negative output terminal of the photovoltaic component switch.
可选的,所述辅助电源的正极端与所述第一光伏组件的正极端连接,所述辅助电源的负极端与所述第一光伏组件的负极端连接;所述第一开关的第一端与所述辅助电源的正极端连接,所述第一开关的第二端与光伏组件关断器的正极输出端连接;所述第二开关的第一端与所述辅助电源的负极端连接,所述第二开关的第二端与所述第二光伏组件的正极端连接;所述第三开关的第一端与所述第二光伏组件的负极端连接,所述第三开关的第二端与所述光伏组件关断器的负极输出端连接。Optionally, the positive terminal of the auxiliary power source is connected to the positive terminal of the first photovoltaic module, and the negative terminal of the auxiliary power source is connected to the negative terminal of the first photovoltaic module; The terminal is connected to the positive terminal of the auxiliary power supply, the second terminal of the first switch is connected to the positive output terminal of the photovoltaic module switch; the first terminal of the second switch is connected to the negative terminal of the auxiliary power supply , The second terminal of the second switch is connected to the positive terminal of the second photovoltaic module; the first terminal of the third switch is connected to the negative terminal of the second photovoltaic module, and the first terminal of the third switch is connected to the negative terminal of the second photovoltaic module. The two ends are connected with the negative output end of the photovoltaic module switch.
可选的,所述开关器件还包括设于所述第二开关的第二端与所述第二光伏组件的正极端之间的第四开关。Optionally, the switching device further includes a fourth switch provided between the second terminal of the second switch and the positive terminal of the second photovoltaic component.
可选的,所述辅助电源的正极端与所述第一光伏组件的正极端连接,所述辅助电源的负极端与所述第一光伏组件的负极端连接;所述第一开关的第一端与所述辅助电源的正极端连接,所述第一开关的第二端与光伏组件关断器的正极输出端连接;所述第二开关的第一端与所述辅助电源的负极端连接,所述第二开关的第二端与所述第二光伏组件的正极端连接;所述第三开关的第一端与所述第二光伏组件的正极端连接,所述第三开关与 所述第二光伏组件的负极端连接。Optionally, the positive terminal of the auxiliary power source is connected to the positive terminal of the first photovoltaic module, and the negative terminal of the auxiliary power source is connected to the negative terminal of the first photovoltaic module; The terminal is connected to the positive terminal of the auxiliary power supply, the second terminal of the first switch is connected to the positive output terminal of the photovoltaic module switch; the first terminal of the second switch is connected to the negative terminal of the auxiliary power supply , The second terminal of the second switch is connected to the positive terminal of the second photovoltaic module; the first terminal of the third switch is connected to the positive terminal of the second photovoltaic module, and the third switch is connected to the positive terminal of the second photovoltaic module. The negative terminal of the second photovoltaic module is connected.
可选的,所述开关器件还包括与所述第三开关并联的第五开关。Optionally, the switching device further includes a fifth switch connected in parallel with the third switch.
当所述第二光伏组件的数量为多个时,所述用于串联第一光伏组件和第二光伏组件的串联通路包括所述第一光伏组件与一个所述第二光伏组件之间的串联通路和各所述第二光伏组件之间的串联通路;When the number of the second photovoltaic module is multiple, the series path for connecting the first photovoltaic module and the second photovoltaic module in series includes the series connection between the first photovoltaic module and one of the second photovoltaic modules A series connection between a passage and each of the second photovoltaic modules;
其中,一个所述串联通路设有一个所述第二开关。Wherein, one of said series path is provided with one said second switch.
可选的,还包括二极管;Optionally, it also includes a diode;
所述二极管的阳极端与光伏组件关断器的负极输出端连接,所述二极管的阴极端与所述光伏组件关断器的正极输出端连接。The anode terminal of the diode is connected with the negative output terminal of the photovoltaic module switch, and the cathode terminal of the diode is connected with the positive output terminal of the photovoltaic module switch.
可选的,所述开关器件具体为MOS管或IGBT或晶闸管或三极管或继电器。Optionally, the switching device is specifically a MOS tube or an IGBT or a thyristor or a triode or a relay.
本申请所提供的光伏组件关断器,包括辅助电源,控制模块,开关器件以及用于串联第一光伏组件和第二光伏组件的串联通路;其中,辅助电源的输入端与第一光伏器件的输出端连接或辅助电源的输入端与第二光伏组件的输出端连接,且辅助电源与开关器件串联;开关器件设于第一光伏组件与光伏组件关断器的正极输出端之间的输出通路或第二光伏组件与光伏组件关断器的负极输出端之间的输出通路或第一光伏组件和第二光伏组件之间的串联通路中的至少一个;控制模块与开关器件的控制端连接,用于控制开关器件的通断。通过本申请提供的光伏组件关断器,实现了在光伏组件关断器的内部断开第一光伏组件、第二光伏组件与逆变器的连接,从而一个光伏组件关断器可以控制两个光伏组件与逆变器的连接,相较于针对单个光伏组件的光伏组件关断器,大幅减少了电子器件数目,减少了机构件,降低了产品成本,降低了功耗。The photovoltaic module shutdown device provided by this application includes an auxiliary power supply, a control module, a switching device, and a series path for connecting a first photovoltaic module and a second photovoltaic module in series; wherein, the input end of the auxiliary power supply is connected to the first photovoltaic device The output terminal is connected or the input terminal of the auxiliary power supply is connected with the output terminal of the second photovoltaic module, and the auxiliary power supply is connected in series with the switching device; the switching device is located in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module switcher Or at least one of the output path between the second photovoltaic component and the negative output terminal of the photovoltaic component switcher or the series path between the first photovoltaic component and the second photovoltaic component; the control module is connected to the control terminal of the switching device, Used to control the on and off of switching devices. Through the photovoltaic module switch-off provided in this application, it is realized that the first photovoltaic module, the second photovoltaic module and the inverter are disconnected inside the photovoltaic module switch-off device, so that one photovoltaic module switch-off device can control two The connection between the photovoltaic module and the inverter, compared with the photovoltaic module switch for a single photovoltaic module, greatly reduces the number of electronic devices, reduces the mechanical parts, reduces the product cost, and reduces the power consumption.
为了更清楚的说明本申请实施例或现有技术的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单的介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are merely For some of the embodiments of the present application, for those of ordinary skill in the art, other drawings may be obtained based on these drawings without creative work.
图1为现有技术中的光伏组件关断器的连接示意图;Figure 1 is a schematic diagram of the connection of a photovoltaic module switch in the prior art;
图2为本申请实施例提供的一种光伏组件关断器的连接示意图;FIG. 2 is a schematic diagram of the connection of a photovoltaic module shutdown device provided by an embodiment of the application;
图3为本申请实施例提供的第一种光伏组件关断器的电路图;FIG. 3 is a circuit diagram of the first photovoltaic module shutdown device provided by an embodiment of the application;
图4为本申请实施例提供的第二种光伏组件关断器的电路图;FIG. 4 is a circuit diagram of a second type of photovoltaic module shutdown device provided by an embodiment of the application;
图5为图4所示的光伏组件关断器的工作状态示意图;FIG. 5 is a schematic diagram of the working state of the photovoltaic module switcher shown in FIG. 4;
图6为本申请实施例提供的第三种光伏组件关断器的电路图;FIG. 6 is a circuit diagram of a third type of photovoltaic module shutdown device provided by an embodiment of the application;
图7为本申请实施例提供的第四种光伏组件关断器的电路图;FIG. 7 is a circuit diagram of a fourth type of photovoltaic module shutdown device provided by an embodiment of the application;
图8为图7所示的光伏组件关断器的工作状态示意图;Fig. 8 is a schematic diagram of the working state of the photovoltaic module switcher shown in Fig. 7;
图9为图7所示的光伏组件关断器的关断状态示意图;FIG. 9 is a schematic diagram of the shutdown state of the photovoltaic module shutdown device shown in FIG. 7;
图10为本申请实施例提供的另一种光伏组件关断器的连接示意图。FIG. 10 is a schematic diagram of the connection of another photovoltaic module shut-off device provided by an embodiment of the application.
本申请的核心是提供一种光伏组件关断器,用于节省光伏***中光伏组件关断器的数量,进而节省相应的器件,降低成本。The core of this application is to provide a photovoltaic module shut-off device, which is used to save the number of photovoltaic module shut-off devices in a photovoltaic system, thereby saving corresponding devices and reducing costs.
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.
实施例一Example one
图2为本申请实施例提供的一种光伏组件关断器的连接示意图。Fig. 2 is a schematic diagram of the connection of a photovoltaic module shut-off device provided by an embodiment of the application.
本申请实施例提供一种可以连接多个光伏组件的光伏组件关断器,如图2所示,以一个光伏组件关断器连接两个光伏组件为例,本申请实施例提供的光伏组件关断器与两个光伏组件的输出端连接,可以控制两个光伏组件与逆变器的连接与否。各光伏组件关断器的输出端串联,最后连接至逆变器。The embodiment of the present application provides a photovoltaic module shutdown device that can be connected to multiple photovoltaic modules. As shown in FIG. 2, taking a photovoltaic module shutdown device connected to two photovoltaic modules as an example, the photovoltaic module shutdown device provided by the embodiment of the application is The breaker is connected to the output terminals of the two photovoltaic modules, which can control whether the two photovoltaic modules are connected to the inverter. The output terminals of each photovoltaic module switch-off device are connected in series, and finally connected to the inverter.
为实现图2所示的效果,本申请实施例提供的光伏组件关断器可以包 括辅助电源,控制模块,开关器件以及用于串联第一光伏组件和第二光伏组件的串联通路;In order to achieve the effect shown in Figure 2, the photovoltaic module switch provided by the embodiment of the present application may include an auxiliary power source, a control module, a switching device, and a series path for connecting the first photovoltaic module and the second photovoltaic module in series;
其中,辅助电源的输入端与第一光伏器件的输出端连接或辅助电源的输入端与第二光伏组件的输出端连接,且辅助电源与开关器件串联;开关器件设于第一光伏组件与光伏组件关断器的正极输出端之间的输出通路或第二光伏组件与光伏组件关断器的负极输出端之间的输出通路或第一光伏组件和第二光伏组件之间的串联通路中的至少一个;控制模块与开关器件的控制端连接,用于控制开关器件的通断。Wherein, the input end of the auxiliary power supply is connected with the output end of the first photovoltaic device or the input end of the auxiliary power supply is connected with the output end of the second photovoltaic module, and the auxiliary power supply is connected in series with the switching device; the switching device is set in the first photovoltaic module and the photovoltaic module. The output path between the positive output terminal of the module switch or the output path between the second photovoltaic module and the negative output terminal of the photovoltaic module switch or the series path between the first photovoltaic module and the second photovoltaic module At least one; the control module is connected to the control end of the switching device, and is used to control the on and off of the switching device.
在本申请实施例提供的光伏组件关断器中,设有第一光伏组件与光伏组件关断器的正极输出端之间的输出通路、第二光伏组件与光伏组件关断器的负极输出端之间的输出通路以及第一光伏组件和第二光伏组件之间的串联通路。通过串联通路,第一光伏组件和第二光伏组件在本申请实施例提供的光伏组件关断器中实现了串联,并通过本申请实施例提供的光伏组件关断器进一步与其他光伏组件串联,最终接入逆变器。In the photovoltaic module shutdown device provided by the embodiment of the present application, there are provided an output path between the first photovoltaic module and the positive output terminal of the photovoltaic module shutdown device, and the second photovoltaic module and the negative output terminal of the photovoltaic module shutdown device are provided. The output path between and the series path between the first photovoltaic module and the second photovoltaic module. Through the series path, the first photovoltaic module and the second photovoltaic module are connected in series in the photovoltaic module switch-off provided in the embodiment of this application, and the photovoltaic module switch-off provided in the embodiment of this application is further connected in series with other photovoltaic modules, Finally, it is connected to the inverter.
由于本申请实施例提供的光伏组件关断器中的各通路均为串联关系,因此开关器件可以设于第一光伏组件与光伏组件关断器的正极输出端之间的输出通路,也可以设于第二光伏组件与光伏组件关断器的负极输出端之间的输出通路,也可以设于第一光伏组件和第二光伏组件之间的串联通路。开关器件可以采用MOS管,也可以采用能实现相同功能的其他器件,如IGBT、晶闸管、三极管或继电器。Since the paths in the photovoltaic module shut-off device provided by the embodiments of the present application are in a series relationship, the switching device can be arranged in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module shut-off device, or it may be arranged in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module shut-off device. The output path between the second photovoltaic module and the negative output terminal of the photovoltaic module switch can also be provided in the series path between the first photovoltaic module and the second photovoltaic module. The switching device can be a MOS tube, or other devices that can achieve the same function, such as an IGBT, a thyristor, a triode, or a relay.
辅助电源的电源来源于第一光伏组件或第二光伏组件,用于给整个光伏组件关断器的电路供电。The power source of the auxiliary power source comes from the first photovoltaic component or the second photovoltaic component, and is used to supply power to the circuit of the entire photovoltaic component breaker.
进一步的,本申请实施例提供的光伏组件关断器还包括二极管;Further, the photovoltaic module shutdown device provided by the embodiment of the present application further includes a diode;
二极管的阳极端与光伏组件关断器的负极输出端连接,二极管的阴极端与光伏组件关断器的正极输出端连接。The anode terminal of the diode is connected with the negative output terminal of the photovoltaic module switch, and the cathode terminal of the diode is connected with the positive output terminal of the photovoltaic module switch.
本申请实施例提供的光伏组件关断器,包括辅助电源,控制模块,开关器件以及用于串联第一光伏组件和第二光伏组件的串联通路;其中,辅助电源的输入端与第一光伏器件的输出端连接或辅助电源的输入端与第二光伏组件的输出端连接,且辅助电源与开关器件串联;开关器件设于第一 光伏组件与光伏组件关断器的正极输出端之间的输出通路或第二光伏组件与光伏组件关断器的负极输出端之间的输出通路或第一光伏组件和第二光伏组件之间的串联通路中的至少一个;控制模块与开关器件的控制端连接,用于控制开关器件的通断。通过本申请提供的光伏组件关断器,实现了在光伏组件关断器的内部断开第一光伏组件、第二光伏组件与逆变器的连接,从而一个光伏组件关断器可以控制两个光伏组件与逆变器的连接,相较于针对单个光伏组件的光伏组件关断器,大幅减少了电子器件数目,减少了机构件,降低了产品成本,降低了功耗。The photovoltaic module shutdown device provided by the embodiment of the present application includes an auxiliary power supply, a control module, a switching device, and a series path for connecting a first photovoltaic module and a second photovoltaic module in series; wherein, the input terminal of the auxiliary power supply is connected to the first photovoltaic device The output terminal of the auxiliary power supply is connected or the input terminal of the auxiliary power supply is connected with the output terminal of the second photovoltaic module, and the auxiliary power supply is connected in series with the switching device; the switching device is set between the first photovoltaic module and the output terminal of the positive output terminal of the photovoltaic module switch At least one of the output path or the output path between the second photovoltaic module and the negative output terminal of the photovoltaic module switch or the series path between the first photovoltaic module and the second photovoltaic module; the control module is connected to the control terminal of the switching device , Used to control the on-off of switching devices. Through the photovoltaic module switch-off provided in this application, it is realized that the first photovoltaic module, the second photovoltaic module and the inverter are disconnected inside the photovoltaic module switch-off device, so that one photovoltaic module switch-off device can control two The connection between the photovoltaic module and the inverter, compared with the photovoltaic module switch for a single photovoltaic module, greatly reduces the number of electronic devices, reduces the mechanical parts, reduces the product cost, and reduces the power consumption.
实施例二Example two
在实施例一的基础上,为实现单点故障冗余,提高关断可靠性,开关器件具体包括第一开关,第二开关和第三开关;On the basis of the first embodiment, in order to achieve single-point failure redundancy and improve shutdown reliability, the switching device specifically includes a first switch, a second switch, and a third switch;
其中,第一开关设于第一光伏组件与光伏组件关断器的正极输出端之间的输出通路;第二开关设于第一光伏组件和第二光伏组件之间的串联通路;第三开关设于第二光伏组件与光伏组件关断器的负极输出端之间的输出通路。Wherein, the first switch is provided in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module switch; the second switch is provided in the series path between the first photovoltaic module and the second photovoltaic module; the third switch The output path is provided between the second photovoltaic module and the negative output terminal of the photovoltaic module switch.
实施例三Example three
图3为本申请实施例提供的第一种光伏组件关断器的电路图;图4为本申请实施例提供的第二种光伏组件关断器的电路图;图5为图4所示的光伏组件关断器的工作状态示意图。FIG. 3 is a circuit diagram of the first type of photovoltaic module shut-off device provided by an embodiment of the application; FIG. 4 is a circuit diagram of a second type of photovoltaic module shut-off device provided by an embodiment of the application; FIG. 5 is the photovoltaic module shown in FIG. 4 Schematic diagram of the working state of the switch.
基于实施例二,本申请实施例提供的一种光伏组件关断器的电路如图3所示,辅助电源的正极端与第一光伏组件的正极端PV1+连接,辅助电源的负极端与第一光伏组件的负极端PV1-连接;第一开关S1的第一端与辅助电源的正极端连接,第一开关S1的第二端与伏组件关断器的正极输出端连接;第二开关S2的第一端与辅助电源的负极端连接,第二开关S2的第二端与第二光伏组件的正极端PV2+连接;第三开关S3的第一端与第二光伏组件的负极端PV2-连接,第三开关S3的第二端与光伏组件关断器的负极输出端OUT-连接。Based on the second embodiment, the circuit of a photovoltaic module switch-off provided by the embodiment of the present application is shown in FIG. 3. The positive terminal of the auxiliary power source is connected to the positive terminal PV1+ of the first photovoltaic module, and the negative terminal of the auxiliary power source is connected to the first photovoltaic module. The negative terminal PV1- of the photovoltaic module is connected; the first terminal of the first switch S1 is connected to the positive terminal of the auxiliary power source, and the second terminal of the first switch S1 is connected to the positive output terminal of the volt module switch; The first terminal is connected to the negative terminal of the auxiliary power supply, the second terminal of the second switch S2 is connected to the positive terminal PV2+ of the second photovoltaic module; the first terminal of the third switch S3 is connected to the negative terminal PV2- of the second photovoltaic module, The second terminal of the third switch S3 is connected to the negative output terminal OUT- of the photovoltaic module switch.
在实际应用中,图3即为本申请实施例提供的第一种光伏组件关断器的关断状态示意图。在工作状态时,控制模块控制第一开关S1、第二开关S2和第三开关S3均导通。在关断状态下,通过控制模块控制第一开关S1、第二开关S2和第三开关S3断开,使第一光伏组件和第二光伏组件从全体光伏组件的串联通路上脱落,且第一光伏组件与第二光伏组件之间不再连接。即使第一开关S1、第二开关S2和第三开关S3中有一个故障,也可以通过其他开关的断开实现上述对第一光伏组件与第二光伏组件的关断。In practical applications, FIG. 3 is a schematic diagram of the shutdown state of the first photovoltaic module shutdown device provided by the embodiment of the present application. In the working state, the control module controls the first switch S1, the second switch S2, and the third switch S3 to be turned on. In the off state, the control module controls the first switch S1, the second switch S2, and the third switch S3 to turn off, so that the first photovoltaic module and the second photovoltaic module fall off the series path of the entire photovoltaic module, and the first The photovoltaic module is no longer connected to the second photovoltaic module. Even if one of the first switch S1, the second switch S2, and the third switch S3 is faulty, the above-mentioned switching off of the first photovoltaic module and the second photovoltaic module can be realized by disconnecting the other switches.
辅助电源可以与第一光伏组件的输出端连接,也可以与第二光伏组件的输出端连接。The auxiliary power source can be connected to the output end of the first photovoltaic component, or can be connected to the output end of the second photovoltaic component.
为进一步提高关断可靠性,如图4所示,开关器件还包括设于第二开关S2的第二端与第二光伏组件的正极端PV2+之间的第四开关S4。In order to further improve the turn-off reliability, as shown in FIG. 4, the switching device further includes a fourth switch S4 arranged between the second terminal of the second switch S2 and the positive terminal PV2+ of the second photovoltaic component.
在实际应用中,第四开关S4与第二开关S2形成冗余,控制方法与第二开关S2一致。图4即为本申请实施例提供的第二种光伏组件关断器的关断状态示意图。本申请实施例提供的第二种光伏组件关断器的工作状态如图5所示。In practical applications, the fourth switch S4 and the second switch S2 form redundancy, and the control method is the same as that of the second switch S2. FIG. 4 is a schematic diagram of the shutdown state of the second photovoltaic module shutdown device provided by an embodiment of the application. The working state of the second photovoltaic module shut-off device provided by the embodiment of the present application is shown in FIG. 5.
实施例四Example four
图6为本申请实施例提供的第三种光伏组件关断器的电路图;图7为本申请实施例提供的第四种光伏组件关断器的电路图;图8为图7所示的光伏组件关断器的工作状态示意图;图9为图7所示的光伏组件关断器的关断状态示意图。6 is a circuit diagram of a third type of photovoltaic module shutdown device provided by an embodiment of this application; FIG. 7 is a circuit diagram of a fourth type of photovoltaic module shutdown device provided by an embodiment of this application; FIG. 8 is the photovoltaic module shown in FIG. 7 A schematic diagram of the working state of the shutdown device; FIG. 9 is a schematic diagram of the shutdown state of the photovoltaic module shutdown device shown in FIG. 7.
基于实施例二,本申请实施例提供的一种光伏组件关断器的电路如图6所示,辅助电源的正极端与第一光伏组件的正极端PV1+连接,辅助电源的负极端与第一光伏组件的负极端PV1-连接;第一开关S1的第一端与辅助电源的正极端连接,第一开关S1的第二端与光伏组件关断器的正极输出端OUT+连接;第二开关S2的第一端与辅助电源的负极端连接,第二开关S2的第二端与第二光伏组件的正极端PV2+连接;第三开关S3的第一端与第二光伏组件的正极端PV2+连接,第三开关S3与第二光伏组件的负极端PV2-连接。Based on the second embodiment, the circuit of a photovoltaic module switcher provided by the embodiment of the present application is shown in FIG. 6. The positive terminal of the auxiliary power source is connected to the positive terminal PV1+ of the first photovoltaic module, and the negative terminal of the auxiliary power source is connected to the first photovoltaic module. The negative terminal PV1- of the photovoltaic module is connected; the first terminal of the first switch S1 is connected to the positive terminal of the auxiliary power source, and the second terminal of the first switch S1 is connected to the positive output terminal OUT+ of the photovoltaic module switch; the second switch S2 The first terminal of the second switch S2 is connected to the negative terminal of the auxiliary power supply, the second terminal of the second switch S2 is connected to the positive terminal PV2+ of the second photovoltaic module; the first terminal of the third switch S3 is connected to the positive terminal PV2+ of the second photovoltaic module, The third switch S3 is connected to the negative terminal PV2- of the second photovoltaic component.
在实际应用中,在工作状态时,控制模块控制第一开关S1和第二开关S2导通,控制第三开关S3关断。在关断状态时,控制模块控制第一开关S1和第二开关S2关断以断开第一开关S1与光伏组件关断器的正极输出端OUT+之间的连接以及第一开关S1与第二开关S2之间的串联连接,控制第三开关S3导通以短路第二光伏组件,实现对第二光伏组件的关断。In practical applications, in the working state, the control module controls the first switch S1 and the second switch S2 to turn on, and controls the third switch S3 to turn off. In the off state, the control module controls the first switch S1 and the second switch S2 to be turned off to disconnect the connection between the first switch S1 and the positive output terminal OUT+ of the photovoltaic module switch and the first switch S1 and the second switch S1. The series connection between the switches S2 controls the third switch S3 to be turned on to short-circuit the second photovoltaic component, so as to turn off the second photovoltaic component.
为进一步提高关断可靠性,如图7所示,开关器件还包括与第三开关S3并联的第五开关S5。在实际应用中,第五开关S5与第三开关S3形成冗余,控制方法与第三开关S3一致。本申请实施例提供的第四种光伏组件关断器的工作状态如图8所示,本申请实施例提供的第四种光伏组件关断器的关断状态如图9所示。In order to further improve the turn-off reliability, as shown in FIG. 7, the switching device further includes a fifth switch S5 connected in parallel with the third switch S3. In practical applications, the fifth switch S5 and the third switch S3 form redundancy, and the control method is the same as that of the third switch S3. The working state of the fourth photovoltaic module shut-off device provided by the embodiment of the present application is shown in FIG. 8, and the shut-off state of the fourth photovoltaic module shutoff device provided in the embodiment of the present application is shown in FIG. 9.
实施例五Example five
图10为本申请实施例提供的另一种光伏组件关断器的连接示意图。FIG. 10 is a schematic diagram of the connection of another photovoltaic module shut-off device provided by an embodiment of the application.
基于上述实施例,当第二光伏组件的数量为多个时,则用于串联第一光伏组件和第二光伏组件的串联通路包括第一光伏组件与一个第二光伏组件之间的串联通路和各第二光伏组件之间的串联通路;Based on the above embodiment, when the number of second photovoltaic modules is multiple, the series path used to connect the first photovoltaic module and the second photovoltaic module in series includes the series path between the first photovoltaic module and one second photovoltaic module and Series paths between the second photovoltaic modules;
其中,一个串联通路设有一个第二开关S2。Among them, a series path is provided with a second switch S2.
在具体实施中,当一个第一光伏组件与多个第二光伏组件连接时,第一光伏组件与第二光伏组件之间的串联通路有多个,可以每个串联通路均设置一个第二开关S2,也可以仅在一个串联通路设置一个第二开关S2。In specific implementation, when a first photovoltaic module is connected to multiple second photovoltaic modules, there are multiple serial paths between the first photovoltaic module and the second photovoltaic module, and a second switch may be provided for each serial path S2, it is also possible to provide only one second switch S2 in one series path.
如图10所示,以第二光伏组件的数量为两个,即一个光伏组件关断器连接三个光伏组件为例,本申请实施例提供的光伏组件关断器与三个光伏组件的输出端连接,三个光伏组件在光伏组件关断器内串联,而后各光伏组件关断器的输出端串联,最后连接至逆变器。三个光伏组件之间有两个串联通路,可以对应两个第二开关S2,也可以仅在其中一个串联通路上设置一个第二开关S2。As shown in Fig. 10, taking the number of second photovoltaic modules as two, that is, one photovoltaic module cut-off device is connected to three photovoltaic modules as an example, the photovoltaic module cut-off device provided in the embodiment of the present application and the output of the three photovoltaic modules The three photovoltaic modules are connected in series in the photovoltaic module switch, and then the output terminals of each photovoltaic module switch are connected in series, and finally connected to the inverter. There are two series paths between the three photovoltaic modules, which can correspond to two second switches S2, or only one second switch S2 can be provided on one of the series paths.
当第二光伏组件的数量为多个时,各开关器件的具体安装位置和对应的控制方案以及冗余设置方案可以参考上述实施例,在此不再赘述。When the number of second photovoltaic modules is multiple, the specific installation position of each switching device and the corresponding control scheme and redundant arrangement scheme can refer to the above-mentioned embodiment, which will not be repeated here.
以上对本申请所提供的一种光伏组件关断器进行了详细介绍。说明书中各个实施例采用递进的方式描述,每个实施例重点说明的都是与其他实施例的不同之处,各个实施例之间相同相似部分互相参见即可。应当指出,对于本技术领域的普通技术人员来说,在不脱离本申请原理的前提下,还可以对本申请进行若干改进和修饰,这些改进和修饰也落入本申请权利要求的保护范围内。A detailed description of the photovoltaic module shutdown device provided by the present application has been given above. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of this application, several improvements and modifications can be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.
还需要说明的是,在本说明书中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities or operations. There is any such actual relationship or sequence between operations. Moreover, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes those that are not explicitly listed Other elements of, or also include elements inherent to this process, method, article or equipment. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other same elements in the process, method, article, or equipment that includes the element.
Claims (9)
- 一种光伏组件关断器,其特征在于,包括辅助电源,控制模块,开关器件以及用于串联第一光伏组件和第二光伏组件的串联通路;A photovoltaic module switch, which is characterized by comprising an auxiliary power supply, a control module, a switching device, and a series path for connecting a first photovoltaic module and a second photovoltaic module in series;其中,所述辅助电源的输入端与所述第一光伏器件的输出端连接或所述辅助电源的输入端与所述第二光伏组件的输出端连接,且所述辅助电源与所述开关器件串联;所述开关器件设于所述第一光伏组件与光伏组件关断器的正极输出端之间的输出通路或所述第二光伏组件与所述光伏组件关断器的负极输出端之间的输出通路或所述第一光伏组件和所述第二光伏组件之间的串联通路中的至少一个;所述控制模块与所述开关器件的控制端连接,用于控制所述开关器件的通断。Wherein, the input terminal of the auxiliary power source is connected to the output terminal of the first photovoltaic device or the input terminal of the auxiliary power source is connected to the output terminal of the second photovoltaic module, and the auxiliary power source is connected to the switching device In series; the switching device is provided in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module switch or between the second photovoltaic module and the negative output terminal of the photovoltaic module switch At least one of the output path of the first photovoltaic module and the series path between the second photovoltaic module; the control module is connected to the control terminal of the switching device, and is used to control the switching of the switching device Off.
- 根据权利要求1所述的光伏组件关断器,其特征在于,所述开关器件具体包括第一开关,第二开关和第三开关;The photovoltaic module shutdown device according to claim 1, wherein the switching device specifically comprises a first switch, a second switch and a third switch;其中,所述第一开关设于所述第一光伏组件与所述光伏组件关断器的正极输出端之间的输出通路;所述第二开关设于所述第一光伏组件和所述第二光伏组件之间的串联通路;所述第三开关设于所述第二光伏组件与所述光伏组件关断器的负极输出端之间的输出通路。Wherein, the first switch is provided in the output path between the first photovoltaic module and the positive output terminal of the photovoltaic module switch; the second switch is provided in the first photovoltaic module and the first photovoltaic module. A series path between the two photovoltaic components; the third switch is arranged in the output path between the second photovoltaic component and the negative output terminal of the photovoltaic component switch.
- 根据权利要求2所述的光伏组件关断器,其特征在于,所述辅助电源的正极端与所述第一光伏组件的正极端连接,所述辅助电源的负极端与所述第一光伏组件的负极端连接;所述第一开关的第一端与所述辅助电源的正极端连接,所述第一开关的第二端与光伏组件关断器的正极输出端连接;所述第二开关的第一端与所述辅助电源的负极端连接,所述第二开关的第二端与所述第二光伏组件的正极端连接;所述第三开关的第一端与所述第二光伏组件的负极端连接,所述第三开关的第二端与所述光伏组件关断器的负极输出端连接。The photovoltaic module shutdown device according to claim 2, wherein the positive terminal of the auxiliary power source is connected to the positive terminal of the first photovoltaic module, and the negative terminal of the auxiliary power source is connected to the first photovoltaic module. The negative terminal of the first switch is connected; the first terminal of the first switch is connected to the positive terminal of the auxiliary power source, and the second terminal of the first switch is connected to the positive output terminal of the photovoltaic module switch; the second switch The first terminal of the third switch is connected to the negative terminal of the auxiliary power source, the second terminal of the second switch is connected to the positive terminal of the second photovoltaic module; the first terminal of the third switch is connected to the second photovoltaic module The negative terminal of the component is connected, and the second terminal of the third switch is connected to the negative output terminal of the photovoltaic module switch.
- 根据权利要求3所述的光伏组件关断器,其特征在于,所述开关器件还包括设于所述第二开关的第二端与所述第二光伏组件的正极端之间的第四开关。The photovoltaic module shutdown device according to claim 3, wherein the switching device further comprises a fourth switch provided between the second terminal of the second switch and the positive terminal of the second photovoltaic module .
- 根据权利要求2所述的光伏组件关断器,其特征在于,所述辅助电源的正极端与所述第一光伏组件的正极端连接,所述辅助电源的负极端与 所述第一光伏组件的负极端连接;所述第一开关的第一端与所述辅助电源的正极端连接,所述第一开关的第二端与光伏组件关断器的正极输出端连接;所述第二开关的第一端与所述辅助电源的负极端连接,所述第二开关的第二端与所述第二光伏组件的正极端连接;所述第三开关的第一端与所述第二光伏组件的正极端连接,所述第三开关与所述第二光伏组件的负极端连接。The photovoltaic module shutdown device according to claim 2, wherein the positive terminal of the auxiliary power source is connected to the positive terminal of the first photovoltaic module, and the negative terminal of the auxiliary power source is connected to the first photovoltaic module. The negative terminal of the first switch is connected; the first terminal of the first switch is connected to the positive terminal of the auxiliary power source, and the second terminal of the first switch is connected to the positive output terminal of the photovoltaic module switch; the second switch The first terminal of the third switch is connected to the negative terminal of the auxiliary power source, the second terminal of the second switch is connected to the positive terminal of the second photovoltaic module; the first terminal of the third switch is connected to the second photovoltaic module The positive terminal of the component is connected, and the third switch is connected to the negative terminal of the second photovoltaic component.
- 根据权利要求5所述的光伏组件关断器,其特征在于,所述开关器件还包括与所述第三开关并联的第五开关。The photovoltaic module shutdown device according to claim 5, wherein the switching device further comprises a fifth switch connected in parallel with the third switch.
- 根据权利要求2所述的光伏组件关断器,其特征在于,当所述第二光伏组件的数量为多个时,所述用于串联第一光伏组件和第二光伏组件的串联通路包括所述第一光伏组件与一个所述第二光伏组件之间的串联通路和各所述第二光伏组件之间的串联通路;The photovoltaic module shutdown device according to claim 2, wherein when the number of the second photovoltaic module is multiple, the series path for connecting the first photovoltaic module and the second photovoltaic module in series includes all A series path between the first photovoltaic module and one of the second photovoltaic modules, and a series path between each of the second photovoltaic modules;其中,一个所述串联通路设有一个所述第二开关。Wherein, one of said series path is provided with one said second switch.
- 根据权利要求1所述的光伏组件关断器,其特征在于,还包括二极管;The photovoltaic module shutdown device of claim 1, further comprising a diode;所述二极管的阳极端与光伏组件关断器的负极输出端连接,所述二极管的阴极端与所述光伏组件关断器的正极输出端连接。The anode terminal of the diode is connected with the negative output terminal of the photovoltaic module switch, and the cathode terminal of the diode is connected with the positive output terminal of the photovoltaic module switch.
- 根据权利要求1至8任意一项所述的光伏组件关断器,其特征在于,所述开关器件具体为MOS管或IGBT或晶闸管或三极管或继电器。The photovoltaic module shutdown device according to any one of claims 1 to 8, wherein the switching device is specifically a MOS tube or an IGBT or a thyristor or a triode or a relay.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010036752.9 | 2020-01-14 | ||
CN202010036752.9A CN111224424A (en) | 2020-01-14 | 2020-01-14 | Photovoltaic module shutoff device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021142906A1 true WO2021142906A1 (en) | 2021-07-22 |
Family
ID=70829462
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2020/078740 WO2021142906A1 (en) | 2020-01-14 | 2020-03-11 | Photovoltaic module turn-off apparatus |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN111224424A (en) |
WO (1) | WO2021142906A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113258874B (en) * | 2021-06-16 | 2021-10-29 | 浙江英达威芯电子有限公司 | Shutoff device and photovoltaic system |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105262138A (en) * | 2015-11-26 | 2016-01-20 | 浙江昱能科技有限公司 | Photovoltaic module optimizer |
CN106602504A (en) * | 2017-02-28 | 2017-04-26 | 阳光电源股份有限公司 | Photovoltaic rapid turn-off device and photovoltaic system |
US20170294780A1 (en) * | 2006-12-06 | 2017-10-12 | Solaredge Technologies, Ltd. | System and method for protection during inverter shutdown in distributed power installations |
CN206775459U (en) * | 2017-02-28 | 2017-12-19 | 阳光电源股份有限公司 | The cutoff device and photovoltaic module turning off system of a kind of photovoltaic module |
CN207150526U (en) * | 2017-09-22 | 2018-03-27 | 阿特斯阳光电力集团有限公司 | Multicompartment level Quick shut-off device and photovoltaic system |
CN107947543A (en) * | 2017-12-29 | 2018-04-20 | 苏州阿特斯阳光电力科技有限公司 | Multi input component level Quick shut-off device and its drive circuit and photovoltaic system |
CN207543063U (en) * | 2017-09-22 | 2018-06-26 | 阿特斯阳光电力集团有限公司 | Multicompartment grade Quick shut-off device and photovoltaic system |
CN110417388A (en) * | 2019-08-02 | 2019-11-05 | 海宁昱能电子有限公司 | A kind of photovoltaic module switching off device and photovoltaic power generation safety system |
CN111313825A (en) * | 2020-02-24 | 2020-06-19 | 海宁昱能电子有限公司 | Photovoltaic module shutoff device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009073868A1 (en) * | 2007-12-05 | 2009-06-11 | Solaredge, Ltd. | Safety mechanisms, wake up and shutdown methods in distributed power installations |
-
2020
- 2020-01-14 CN CN202010036752.9A patent/CN111224424A/en active Pending
- 2020-03-11 WO PCT/CN2020/078740 patent/WO2021142906A1/en active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170294780A1 (en) * | 2006-12-06 | 2017-10-12 | Solaredge Technologies, Ltd. | System and method for protection during inverter shutdown in distributed power installations |
CN105262138A (en) * | 2015-11-26 | 2016-01-20 | 浙江昱能科技有限公司 | Photovoltaic module optimizer |
CN106602504A (en) * | 2017-02-28 | 2017-04-26 | 阳光电源股份有限公司 | Photovoltaic rapid turn-off device and photovoltaic system |
CN206775459U (en) * | 2017-02-28 | 2017-12-19 | 阳光电源股份有限公司 | The cutoff device and photovoltaic module turning off system of a kind of photovoltaic module |
CN207150526U (en) * | 2017-09-22 | 2018-03-27 | 阿特斯阳光电力集团有限公司 | Multicompartment level Quick shut-off device and photovoltaic system |
CN207543063U (en) * | 2017-09-22 | 2018-06-26 | 阿特斯阳光电力集团有限公司 | Multicompartment grade Quick shut-off device and photovoltaic system |
CN107947543A (en) * | 2017-12-29 | 2018-04-20 | 苏州阿特斯阳光电力科技有限公司 | Multi input component level Quick shut-off device and its drive circuit and photovoltaic system |
CN110417388A (en) * | 2019-08-02 | 2019-11-05 | 海宁昱能电子有限公司 | A kind of photovoltaic module switching off device and photovoltaic power generation safety system |
CN111313825A (en) * | 2020-02-24 | 2020-06-19 | 海宁昱能电子有限公司 | Photovoltaic module shutoff device |
Also Published As
Publication number | Publication date |
---|---|
CN111224424A (en) | 2020-06-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN106602504B (en) | A kind of photovoltaic Quick shut-off device and photovoltaic system | |
WO2021003790A1 (en) | Module switchoff device and security protection system of photovoltaic power generation system | |
CN109066798B (en) | Shutoff device of photovoltaic module | |
EP3407446A1 (en) | Bridge-type circuit, and direct current breaking device and control method thereof | |
CN106817075B (en) | A kind of photovoltaic junction box and photovoltaic system | |
CN109088431B (en) | Photovoltaic module turn-off equipment and method and photovoltaic system | |
CN111313825A (en) | Photovoltaic module shutoff device | |
CN109474020A (en) | A kind of photovoltaic module intelligence turning off system and its method | |
CN112868153B (en) | Converter, method and system applied to photovoltaic power generation system | |
US20220368126A1 (en) | Photovoltaic power generation system, photovoltaic inverter, and direct current combiner box | |
WO2021142906A1 (en) | Photovoltaic module turn-off apparatus | |
CN103095099B (en) | A kind of load driving circuits | |
CN202906774U (en) | High-power photovoltaic inverter with automatic power-off auxiliary power supply circuit | |
CN104660038A (en) | Intelligent solar photovoltaic module circuit and control/protection method thereof | |
WO2021208141A1 (en) | Power supply system | |
WO2021208142A1 (en) | Power supply system | |
WO2021142905A1 (en) | Photovoltaic inverter | |
WO2024045509A1 (en) | Photovoltaic parallel optimizer | |
CN108767932A (en) | A kind of energy storage serial array and its control method | |
CN114024291A (en) | Multi-control component-level rapid shutoff device | |
CN114301390A (en) | Shutdown circuit for photovoltaic system and control method thereof | |
CN103236693A (en) | Unified electric energy quality controller | |
CN110729751A (en) | Direct current component shutoff device | |
WO2022116389A1 (en) | Photovoltaic module turn-off circuit and photovoltaic device | |
CN218733282U (en) | Photovoltaic power generation system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20913249 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 20913249 Country of ref document: EP Kind code of ref document: A1 |