CN111293972A

CN111293972A - Photovoltaic system

Info

Publication number: CN111293972A
Application number: CN201811485640.0A
Authority: CN
Inventors: 游佩珊; 黄昭仁
Original assignee: Industrial Technology Research Institute ITRI
Current assignee: Industrial Technology Research Institute ITRI
Priority date: 2018-12-06
Filing date: 2018-12-06
Publication date: 2020-06-16

Abstract

A photovoltaic system includes a solar photovoltaic module and a control device. The control device has a first positive terminal and a first negative terminal, and includes a diode, a switch, and a controller. The diode has an anode end and a cathode end, wherein the anode end is electrically connected to the first negative end and the cathode end is electrically connected to the first positive end. The switch is provided with a control end, and the switch and the solar photovoltaic module are connected in series between the first positive end and the first negative end. The controller is electrically connected with the control end of the switch and is used for turning off the switch so as to enable current to pass through a bypass current path comprising the diode.

Description

Photovoltaic system

Technical Field

The invention relates to a photovoltaic system.

Background

Generally, a solar power plant is provided with a plurality of solar photovoltaic modules connected in series, and the overall series voltage is about 300-600 volts. The tandem solar photovoltaic modules of some specific solar power plants can provide tandem voltages of up to 800 volts. Therefore, when a solar power plant is in fire, electric shock may be caused if water is sprinkled. In this case, it is only possible to wait passively for the solar photovoltaic module to burn out.

The conventional countermeasure is to provide a manual controller or to turn off the current path of the photovoltaic module by power line transmission. However, in the former countermeasure, it takes much time to find the abnormality of the fire, to manually activate the shutdown control, and to wait until the voltage drops to the allowable range. In the latter countermeasure, the power line is connected to the entire tandem photovoltaic module, and it is not possible to confirm that the connection between the modules is broken, and it is difficult to ensure that the residual voltage in the photovoltaic module is reduced to the allowable range. Moreover, when the physical control circuit is damaged due to high-temperature combustion, the power supply cannot be controlled to be turned off, so how to immediately disconnect the current path of the solar power-off module to ensure that the voltage of the solar power system is reduced to an allowable range, thereby facilitating subsequent disaster relief.

Disclosure of Invention

The invention provides a photovoltaic system, which mainly applies the configuration of a diode, can switch a switch element according to a control signal to guide current into a bypass current path, and further immediately stops a solar photovoltaic module to reduce the whole voltage.

According to an embodiment of the present invention, a photovoltaic system includes a photovoltaic module and a control device. The control device has a first positive terminal and a first negative terminal, and includes a diode, a switch, and a controller. The diode has an anode end and a cathode end, wherein the anode end is electrically connected to the first negative end and the cathode end is electrically connected to the first positive end. The switch is provided with a control end, and the switch and the solar photovoltaic module are connected in series between the first positive end and the first negative end. The controller is electrically connected with the control end of the switch and is used for turning off the switch so as to enable current to pass through a bypass current path comprising the diode.

In summary, in the photovoltaic system provided by the present invention, the anode terminal and the cathode terminal of the diode are respectively connected to the positive terminal and the negative terminal of the control device, and by using the circuit architecture, when the control signal is sent to turn off the switch, the current of the system can be guided from the original current path to another current path, so that the current path of the photovoltaic module can be immediately disconnected under a specific condition (for example, abnormal photovoltaic module or environmental abnormality), so as to ensure that the voltage of the photovoltaic system is reduced to an allowable range, thereby facilitating the repair or disaster relief of subsequent devices. On the other hand, the circuit framework can be used for deactivating a specific solar photovoltaic module to carry out online replacement or maintenance.

The foregoing description of the disclosure and the following detailed description are presented to illustrate and explain the principles and spirit of the invention and to provide further explanation of the invention as claimed.

Drawings

Fig. 1 is a circuit architecture diagram of an optoelectronic system according to an embodiment of the present invention.

Fig. 2 and fig. 3 are detailed circuit architecture diagrams of the optoelectronic system in different states according to an embodiment of the present invention.

Fig. 4 is a detailed circuit architecture diagram of an optoelectronic system according to another embodiment of the present invention.

Fig. 5 and fig. 6 are detailed circuit architecture diagrams of the optoelectronic system in different states according to another embodiment of the present invention.

Fig. 7 is a detailed circuit architecture diagram of an optoelectronic system according to another embodiment of the present invention.

Fig. 8 is a detailed circuit architecture diagram of an optoelectronic system according to another embodiment of the present invention.

Fig. 9 is a detailed circuit architecture diagram of an optoelectronic system according to another embodiment of the present invention.

Fig. 10 is a circuit architecture diagram of an optoelectronic system according to another embodiment of the present invention.

Fig. 11A to 11F are schematic diagrams of a solar photovoltaic module according to various embodiments of the invention.

Description of the symbols

100. 300, 400, 600, 700, 800, 900 optoelectronic system

110. 310, 410, 610, 710, 810, 910 solar photovoltaic module

120. 320, 420, 620, 720, 820, 920 control device

121. 321, 421, 621, 721, 821, 921, 111 a-111 c, 911 a-911 c diodes

122. 322, 422, 622, 722, 822, 922 switch

123. 323, 423, 623, 723, 823, 923 controller

124. 324, 424, 624, 724, 824, 924 signal transmitter

200. 500 base station

201. 501 gateway

911 terminal box

110 a-110 c, 110a _ 1-110 c _1, 910 a-910 c solar cells

1241. 3241, 4241, 6241, 7241, 8241 wireless module

202. 502, 1242, 3242, 4242, 6242, 7242, 8242 antenna

425. 625, 725, 825' current sensor

P, T1, T3, T5 positive terminal

N, T2, T4, and T6 minus terminal

C1-C3 single solar cell unit

Detailed Description

The detailed features and advantages of the present invention are described in detail in the following embodiments, which are sufficient for any person skilled in the art to understand the technical contents of the present invention and to implement the same, and the objects and advantages related to the present invention can be easily understood by any person skilled in the art according to the disclosure of the present specification, the claims and the accompanying drawings. The following examples further illustrate aspects of the present invention in detail, but are not intended to limit the scope of the invention in any way.

Referring to fig. 1, fig. 1 is a circuit architecture diagram of an optoelectronic system according to an embodiment of the present invention. As shown in fig. 1, the photovoltaic system 100 includes a solar photovoltaic module 110 and a control device 120. The photovoltaic system 100 has a positive terminal P and a negative terminal N, which can be connected in series with two other photovoltaic systems (not shown), or connected to an electricity storage device, an electric power network or an electric power demand device. The photovoltaic module 110 includes one or more solar cells connected in series, parallel, or series-parallel to provide voltage, the control device 120 has a first positive terminal T1 and a first negative terminal T2, and the control device 120 includes a diode 121, a switch 122, and a controller 123. The diode 121 has an anode terminal and a cathode terminal, wherein the anode terminal is electrically connected to the first negative terminal T2, and the cathode terminal is electrically connected to the first positive terminal T1.

More specifically, the cathode terminal of the diode 121 is electrically connected to the positive terminal P of the optoelectronic system 100, and the anode terminal of the diode 121 is electrically connected to the negative terminal N of the optoelectronic system 100. The switch 122 is connected in series with the solar photovoltaic module 110. In detail, in the embodiment shown in fig. 1, the solar photovoltaic module 110 has a second positive terminal T3 and a second negative terminal T4 electrically connected to the third positive terminal T5 and the third negative terminal T6 of the control device 120, respectively, a first terminal of the switch 122 is electrically connected to the third negative terminal T6 of the solar photovoltaic module 120, and a second terminal of the switch 122 is electrically connected to the first negative terminal T2 of the control device 120. The controller 123 is electrically connected to the control terminal of the switch 122, and the controller 123 is configured to turn off the switch 122, so that the current passes through a bypass current path P1 including a diode 121, which is shown in fig. 3 and will be described in detail later.

Referring to fig. 2 and fig. 3, detailed circuit architecture diagrams of the optoelectronic system in different states according to the embodiment of fig. 1 are respectively shown, wherein the signal transmitter 124 is selected to be a wireless signal transmitter. The configuration shown in fig. 2 is an operation configuration of the optoelectronic system 100 in a normal environment or a normal operation state of the photovoltaic module 110, and the configuration shown in fig. 3 is an operation configuration of the optoelectronic system 100 in an abnormal environment or the photovoltaic module 110. As shown in the embodiment of fig. 2 or fig. 3, the control device 120 may further include a signal transmitter 124, and the signal transmitter 124 is electrically connected to the controller 123 and configured to receive a control signal, so that the controller 123 may turn off the switch 122 according to the control signal. In practice, the signal transmitter 124 can be a wired or wireless signal transmitter, and the user can send a control signal to the signal transmitter 124 to drive the controller 123 to turn off the switch 122 according to the actual situation.

In the normal environment or normal operation of the optoelectronic system 100, as shown in fig. 2, the switch 122 is in the on state. In detail, the controller 123 may turn off the switch 122 through the control terminal of the switch 122 to switch the current path through which the current passes, i.e., the current is changed from the main current path P2 shown in fig. 2 to the bypass current path P1 shown in fig. 3. The bypass current path P1 includes a diode 121, and the main current path P2 includes a switch 122 and the photovoltaic module 110.

As a practical example, in a normal environment, the switch 122 is in a resident conducting state, and when a fire occurs in a factory where the optoelectronic system 100 is located or the photovoltaic module 110 is abnormally operated, an administrator of the external base station may send a shutdown control signal to the signal transmitter 124, and then the signal transmitter 124 further transmits the shutdown control signal to the controller 123, so that the controller 123 turns off the switch 122 according to the shutdown control signal, thereby enabling the current to pass through the bypass current path P1 having the diode 121. In other words, the solar photovoltaic module 110 is substantially deactivated, and the voltage provided by a system having a plurality of solar photovoltaic modules connected in series or in parallel in the entire field is reduced due to the deactivation of the solar photovoltaic module 110. When an abnormal condition occurs, the voltage of the entire photovoltaic system can be instantly reduced to an allowable range, which is helpful for disaster relief or equipment repair. In detail, in the normal environment or normal operation state of the photovoltaic system 100, as shown in fig. 2, current flows from the negative terminal N of the photovoltaic system 100, passes through the main current path P2, and flows from the positive terminal P of the photovoltaic system 100. Conversely, when the environment or the photovoltaic module is abnormal, as shown in fig. 3, the controller 123 turns off the switch 122 according to an external control signal, and the current flows from the negative terminal N of the photovoltaic system 100, passes through the bypass current path P1, and flows from the positive terminal P of the photovoltaic system 100.

More specifically, the wireless signal transmitter 124 shown in fig. 2 and 3 includes a wireless module 1241 and an antenna 1242. The wireless module 1241 is electrically connected to the controller 123 and receives a control signal through the antenna 1242. Specifically, the wireless signal transmitter 124 can be wirelessly connected with an external base station 200, and the base station 200 has a gateway 201 and an antenna 202. The base station 200 can transmit a control signal to the wireless transmitter 124 through the antenna 202, and the wireless module 1241 in the wireless transmitter 124 can receive the control signal through the antenna 1242 and further demodulate the control signal into a baseband signal to the controller 123 for turning off the switch 122. In another embodiment, the controller 123 may also turn on the switch 122 according to another control signal. For example, when an abnormal condition of the factory building (e.g. fire) or an abnormal condition of the photovoltaic module is eliminated, the external base station 200 may send another control signal to the photovoltaic system 100, so that the controller 123 turns on the switch 122 again to allow the current to flow back to the main current path P2.

In the embodiment of fig. 2 and 3, the switch 122 has a first end electrically connected to the second negative terminal T4, and the switch 122 has a second end electrically connected to the first negative terminal T2. However, the present invention is not limited to this embodiment.

Referring to fig. 4, fig. 4 is a detailed circuit architecture diagram of an optoelectronic system according to another embodiment of the present invention. In the embodiment of fig. 4, the photovoltaic system 300 includes a solar photovoltaic module 310 and a control device 320. The control device 320 includes a diode 321, a switch 322, a controller 323, and a signal transmitter 324. The signal transmitter 324 may have a wireless module 3241 and an antenna 3242. The optoelectronic assembly 300 of fig. 4 has substantially the same connection of components as the optoelectronic assembly 100 of fig. 2 and 3, but the difference is the position of the switch. More specifically, a first end of the switch 322 of the photovoltaic system 300 of fig. 4 is electrically connected to the first positive terminal T1 of the control device 320, and a second end of the switch 322 is electrically connected to the second positive terminal T3 of the photovoltaic module 310.

In one example, as shown in fig. 1, the controller 123 is electrically connected to the second positive terminal T3 of the solar photovoltaic module 110 for detecting a voltage value of the solar photovoltaic module 110. More specifically, the controller 123 may be connected to the second positive terminal T3 of the photovoltaic module 110 through an additional circuit, and is configured with a ground line of the controller 123 itself, so as to directly measure and obtain the voltage value of the photovoltaic module 110. In practice, the controller 123 may transmit the electrical signal related to the voltage value to the external base station in the form of a wireless signal through the signal transmitter 124 shown in fig. 2 for data processing at the back end. For example, the controller 123 may transmit the electrical signal in a form of a wireless signal through the signal transmitter 124 (e.g., having a wireless module and an antenna) to the gateway 201 of the base station 200 shown in fig. 2 and 3 for back-end data processing. The electrical signal may be in analog or digital form. The same configuration can also be applied to the embodiment of fig. 4, as shown in fig. 4, the controller 323 can be electrically connected to the second positive terminal T3 of the solar photovoltaic module 310 through an additional circuit for detecting the voltage value of the solar photovoltaic module 310.

Referring to fig. 5 and fig. 6 together, fig. 5 and fig. 6 are detailed circuit architecture diagrams of the optoelectronic system in different states according to another embodiment of the present invention. In the embodiment shown in fig. 5 and 6, the photovoltaic system 400 includes a solar photovoltaic module 410 and a control device 420. The control device 420 includes a diode 421, a switch 422, a controller 423, and a signal transmitter 424. The transmitter 424 has a wireless module 4241 and an antenna 4242, and can be wirelessly connected with the base station 500 having the gateway 501 and the antenna 502. The optoelectronic assembly 300 of fig. 5 and 6 is substantially the same as the optoelectronic assembly 100 of fig. 2 and 3, except that the control device 420 further comprises a current sensor 425 connected in series with the switch 422 and electrically connected to the controller 423. The architecture shown in fig. 5 is an operation architecture of the optoelectronic system 400 in a normal environment state, and the architecture shown in fig. 6 is an operation architecture of the optoelectronic system 400 in an abnormal environment or an abnormal solar photovoltaic module. In the normal environment or normal operation of the photovoltaic module, the switch 422 is in a conducting state, and current flows from the negative terminal N of the photovoltaic system 400, passes through the main current path P2, and flows from the positive terminal P of the photovoltaic system 400. The main current path P2 includes a switch 422, a photovoltaic module 410, and a current sensor 425.

In a normal state, as shown in fig. 5, the current sensor 425 may sense a current value that the current passing through the main current path P2 has, and provide an electric signal regarding the current value to the controller 423. The electrical signals described herein may be in digital or analog form. On the contrary, in an abnormal state (e.g. abnormal solar photovoltaic module), as shown in fig. 6, the controller 123 turns off the switch 122 according to the control signal from the base station 500, and the current passes through the bypass current path P1 including the diode 421. In other words, in an abnormal state, current does not pass through the current sensor 425. In the embodiments of fig. 5 and 6, the current sensor 425 is connected in series between the first positive terminal T1 and the second positive terminal T3, but the invention is not limited thereto. In practice, the controller 423 may wirelessly transmit an electrical signal in digital or analog form related to the sensed current value to the external antenna 502 of the base station 500 through the wireless module 4241 and the antenna 4242, so that the gateway 501 of the base station 500 receives the electrical signal for back-end data processing. In the embodiment shown in fig. 5, the controller 423 may be further electrically connected to the second positive terminal T3 of the solar photovoltaic module 410 through an additional circuit for detecting the voltage of the solar photovoltaic module 410.

Referring to fig. 7, fig. 7 is a detailed circuit architecture diagram of an optoelectronic system according to another embodiment of the present invention. In the embodiment of fig. 7, the photovoltaic system 600 includes a solar photovoltaic module 610 and a control device 620. The control device 620 includes a diode 621, a switch 622, a controller 623, a signal transmitter 624, and a current sensor 625. The signal transmitter 624 has a wireless module 6241 and an antenna 6242. The optoelectronic system 600 of fig. 7 is substantially the same as the optoelectronic system 400 of fig. 5 and 6 in terms of the connection of the components, but the difference lies in the installation position of the current sensor 625 in the control device 620. In the embodiment of fig. 7, the current sensor 625 is connected in series between the second negative terminal T4 of the solar photovoltaic module 610 and the switch 622.

Referring to fig. 8, fig. 8 is a detailed circuit architecture diagram of an optoelectronic system according to another embodiment of the present invention. Similarly, in the embodiment of fig. 8, the photovoltaic system 700 includes a solar photovoltaic module 710 and a control device 720. The control device 720 includes a diode 721, a switch 722, a controller 723, a signal transmitter 724, and a current sensor 725. The signal transmitter 724 has a wireless module 7241 and an antenna 7242. The optoelectronic assembly 700 of fig. 8 is connected to the optoelectronic assembly 400 of fig. 5 and 6 in substantially the same manner, but the difference is the location of the current sensor 725 in the control device 720. In the embodiment of fig. 8, the current sensor 725 is connected in series between the first negative terminal T2 of the control device 720 and the switch 722.

The photovoltaic system of the present invention may further be configured with a temperature sensor (not shown) for sensing the temperature of the photovoltaic module. When the sensed temperature exceeds a preset value, the controller can turn off the switch to achieve safety protection. In addition, in addition to the application of the photovoltaic system in an abnormal situation (e.g. fire), in another application example, the controller of the photovoltaic system may detect the electrical signal related to the voltage value and/or the current value and/or the temperature value of the photovoltaic module by using the above-mentioned method (e.g. external connection line and/or external connection current/temperature sensor), and transmit the electrical signal related to the voltage value, the current value or the temperature value back to the gateway of the base station in the form of a wireless signal through the signal transmitter. When the administrator of the base station analyzes the returned analog or digital signal to determine that the voltage value and/or the current value is abnormal (for example, the value is too low), a control signal can be sent to the photovoltaic system, so that the controller turns off the switch according to the control signal to temporarily stop the solar photovoltaic module in the photovoltaic system. Therefore, maintenance personnel can conveniently overhaul the abnormal solar photoelectric module. The foregoing embodiments are exemplified by the signal transmitter being a wireless signal transmitter. In another embodiment, the signal transmitter may be a physical line transmitter, and the controller may control the physical line transmitter to receive the control signal through one or more physical transmission lines. In practice, the signal control of the controller can be achieved by setting buttons, operating switches, and Power Lines (PLC).

Referring to fig. 9, fig. 9 is a detailed circuit architecture diagram of an optoelectronic system according to another embodiment of the present invention. As shown in fig. 9, the photovoltaic system 800 includes a solar photovoltaic module 810 and a control device 820. The control device 820 includes a diode 821, a switch 822, a controller 823, and a signal transmitter 824. The signal transmitter 824 has a wireless module 8241 and an antenna 8242. The photovoltaic system 800 shown in fig. 9 is similar to the photovoltaic system 300 shown in fig. 4, except that the photovoltaic system 800 shown in fig. 9 further includes a current sensor 825, wherein the current sensor 825 is connected in series between the first positive terminal T1 of the control device 820 and the switch 822. However, the present invention is not limited to the above-described embodiments. Specifically, in one embodiment, a current sensor (e.g., current sensor 825 ') may be used instead of the current sensor 825, and the current sensor 825' is configured to be connected in series between the second positive terminal T3 of the solar photovoltaic module 810 and the switch 822. In another embodiment, a current sensor (e.g., current sensor 825 ") may be used instead of the current sensor 825 or the current sensor 825', the current sensor 825" is configured to be connected in series between the second negative terminal T4 of the solar photovoltaic module 810 and the first negative terminal T2 of the control device 820.

Referring to fig. 10, fig. 10 is a circuit architecture diagram of an optoelectronic system according to another embodiment of the present invention. The photovoltaic system 900 includes a solar photovoltaic module 910 and a control device 920. The control device 920 includes a diode 921, a switch 922, a controller 923, and a signal transmitter 924. The photovoltaic system 900 further includes a junction box 911, and the junction box 911 includes a plurality of diodes 911 a-911 c, each of which is connected in parallel to a corresponding one of the plurality of solar cells 910 a-910 c in the photovoltaic module. The provision of the junction box 911 may be used to ensure that the entire system will still function properly when any one of the solar cells fails.

Specifically, the solar cells 910a to 910c of the photovoltaic module are connected in parallel to the diodes 911a to 911c, respectively, and if the solar cell 910c fails, the current can pass through the diode 911c and avoid the failed solar cell 910c, so that the current loop of the entire system is kept open. In practice, the optoelectronic system provided by the present invention can be configured with the junction box and the current sensor, and can be further configured with the circuit for detecting voltage. The invention is not limited to the arrangement of the components of the single embodiment described above. However, in other embodiments, the junction box 911 may be integrated into the solar photovoltaic module 910 according to requirements, that is, the solar photovoltaic module 910 may have both a solar cell and a junction box.

Referring to fig. 11A to 11F, fig. 11A to 11F are schematic diagrams of a solar photovoltaic module according to various embodiments of the present invention. In the following embodiments, only the solar photovoltaic module is shown, and other elements in the photovoltaic system and the connection relationship thereof can refer to the foregoing fig. 1 to 9, and are not described again, and the structures shown in fig. 11A to 11F can be applied to the solar photovoltaic module in all embodiments of the present invention according to actual requirements. In the embodiment of fig. 11A, the photovoltaic module 110 has a single solar cell 110a, and in the embodiment of fig. 11B, the photovoltaic module 110 is formed by connecting a plurality of solar cells 110 a-110 c in series. The number of solar cells shown herein is for illustration only and the present invention is not limited to this number.

In other embodiments, the solar photovoltaic module 110 may include a junction box in addition to the solar cell. The embodiment of fig. 11C differs from the embodiment of fig. 10 in that the solar cell and the junction box are integrated into a solar photovoltaic module. As shown in the embodiment of fig. 11C, the solar photovoltaic module 110 may include a plurality of solar cells 110 a-110C and a junction box 111. The junction box 111 includes a plurality of diodes 111 a-111 c, and each diode is connected in parallel to a corresponding solar cell, for example, the diode 111a is connected in parallel to the solar cell 110a, the diode 111b is connected in parallel to the solar cell 110b, and the diode 111c is connected in parallel to the solar cell 110 c.

In other embodiments, the solar cell of the photovoltaic module 110 is composed of a plurality of single solar cells. For example, as shown in fig. 11D, the solar cell 110a _1 included in the solar photovoltaic module 110 is a solar cell group, and is composed of a plurality of single solar cells C1. That is, the solar cell 110a _1 may include a plurality of unit solar cell units C1. As shown in fig. 11E, the solar photovoltaic module 110 includes solar cells 110a _1 to 110C _1, wherein each of the solar cells 110a _1 to 110C _1 is a solar cell group, which is composed of a plurality of single solar cells C2. As shown in fig. 11F, the solar photovoltaic module 110 may include a plurality of solar cells 110a _1 to 110C _1 composed of a plurality of single solar cells C3 and a junction box 111. The diodes 111a to 111c in the junction box 111 are respectively connected in parallel to the corresponding solar cells, for example, the diode 111a is connected in parallel to the solar cell 110a _1, the diode 111b is connected in parallel to the solar cell 110b _1, and the diode 111c is connected in parallel to the solar cell 110c _ 1.

In practice, the number of the single solar cells of each solar cell can be adjusted according to actual requirements, and the invention is not limited to the embodiments shown in fig. 11D, 11E, and 11F. For practical purposes, each of the single solar cells (e.g., C1-C3) may have a voltage of 0.5 v, and 20 to 24 single solar cells are connected in series to form a solar cell group, and the voltage of the solar cell group can reach 10 v to 12 v, so that 3 solar cell groups are connected in series to form a photovoltaic module 110, and the overall voltage of the photovoltaic module 110 can reach about 30 v to 36 v. Generally, a solar cell group can be connected in series with more than 10 to 60 single solar cells, and a solar photovoltaic module can be formed by connecting in series more than 1 to 10 solar cell groups.

In summary, in the photovoltaic system provided by the present invention, the anode terminal and the cathode terminal of the diode are respectively connected to the negative terminal and the positive terminal of the control device, and by using the circuit architecture, when the control signal is sent to turn off the switch, the current of the system can be guided from the original current path to another current path, so that the current path of the photovoltaic module can be immediately disconnected under a specific condition (for example, abnormal photovoltaic module or environmental abnormality), so as to ensure that the voltage of the photovoltaic system is reduced to an allowable range, thereby facilitating subsequent device repair or disaster relief. On the other hand, the circuit framework can be used for deactivating a specific solar photovoltaic module to carry out online replacement or maintenance.

Claims

1. An optoelectronic assembly, comprising:

a solar photoelectric module; and

a control device having a first positive terminal and a first negative terminal, the control device comprising:

a diode having an anode end and a cathode end, wherein the anode end is electrically connected to the first negative end, and the cathode end is electrically connected to the first positive end;

a switch having a control terminal, the switch and the solar photovoltaic module being connected in series between the first positive terminal and the first negative terminal; and

a controller electrically connected to the control terminal of the switch and configured to turn off the switch to pass a current through a bypass current path including the diode.

2. The optoelectronic system of claim 1, wherein the control device further comprises a signal transmitter electrically connected to the controller and configured to receive a control signal, such that the controller turns off the switch according to the control signal.

3. The optoelectronic system of claim 2, wherein the signal transmitter is a wireless transmitter, the wireless transmitter comprising a wireless module and an antenna, the wireless module electrically connected to the controller and receiving the control signal via the antenna.

4. The optoelectronic system of claim 2, wherein the signal transmitter is a physical line transmitter, the controller controlling the physical line transmitter to receive the control signal over one or more physical transmission lines.

5. The optoelectronic system of claim 1, wherein the diode is a first diode, the optoelectronic system further comprising a junction box comprising a plurality of second diodes, each of the plurality of second diodes connected in parallel to a corresponding one of the plurality of solar cells in the solar photovoltaic module.

6. The optoelectronic system of claim 1, wherein the diode is a first diode, the solar photovoltaic module comprises a plurality of solar cells and a junction box comprising a plurality of second diodes, each of the plurality of second diodes being connected in parallel to a corresponding one of the plurality of solar cells.

7. The optoelectronic system of claim 1, wherein the switch further has a first end and a second end, the first end of the switch is electrically connected to a second negative terminal of the solar photovoltaic module, and the second end of the switch is electrically connected to the first negative terminal of the control device.

8. The optoelectronic system of claim 1, wherein the switch further has a first end and a second end, the first end of the switch is electrically connected to the first positive terminal of the control device, and the second end of the switch element is electrically connected to a second positive terminal of the solar photovoltaic module.

9. The optoelectronic system of claim 1, wherein the control device further comprises a current sensor connected in series with the switch and electrically connected to the controller, the current sensor being configured to sense a current value of a current passing through a main current path when the switch is in the on state and provide an electrical signal related to the current value to the controller, wherein the main current path comprises the switch and the current sensor.

10. The optoelectronic system of claim 9, wherein the current sensor is connected in series between the first positive terminal of the control device and a second positive terminal of the solar photovoltaic module.

11. The optoelectronic system of claim 9, wherein the current sensor is connected in series between a second negative terminal of the solar photovoltaic module and the switch.

12. The optoelectronic system of claim 9, wherein the current sensor is connected in series between the first negative terminal of the control device and the switch.

13. The optoelectronic system of claim 1, wherein the controller is electrically connected to a second positive terminal of the solar photovoltaic module to detect a voltage level of the solar photovoltaic module.