[0038] The present invention will be described in detail below with reference to the specific embodiments shown in the drawings, but these embodiments are not limited to the structures, methods, or functional transformations made by those skilled in the art in accordance with these embodiments. All are included in the scope of the invention.
[0039]When a component is referred to as "connected" or "bind to" another component, the component can be directly connected to or directly coupled to the other component directly, or can present intermediate components. . However, when the components are referred to as "directly connected to" or "directly bind to" another component, there is no intermediate member. To this end, the term "connection" can refer to physical connection, electrical connection, or the like, and has or does not have intermediate components.
[0040] figure 2 A schematic circuit configuration diagram of a multi-input shuttle according to a first embodiment of the present invention, which includes:
[0041] The first input 21 is configured to couple the first photovoltaic unit 200, and the first photovoltaic unit 200 includes at least one battery substring and a continuation of the diode with the battery substring;
[0042] At least one second input terminal 22 is configured to couple the second photovoltaic unit 300, and the second photovoltaic unit 300 includes at least one battery substring and a continuation of the diode parallel to the battery substru.
[0043] The first shutdown module 23 is coupled to the first input terminal 21, and the first shut-off module 23 includes at least the first switching tube S1 and the first bypass tube D4, and the first switching tube S1 is used to control the first photovoltaic unit 200. And between the power bus, the first bypass tube D4 is used to provide a continuation channel for the power bus current when the first photovoltaic unit 200 is abnormal;
[0044] At least one second shutdown module 24 is coupled to the second input terminal 22, and the second shutdown module 24 includes at least a second switching tube S2;
[0045] The control module 25 is taken from the first input terminal 21 to control the conductive and shutdown of the first switching tube S1 and the second switching tube S2 according to the monitoring signal and the communication signal;
[0046] The output terminal 26 is used to couple the power bus, the output of the first shutdown module 23 and the second shutdown module 24 is connected to the output 26;
[0047] When the second input terminal 22 is abnormally coupled, the control module 25 controls the second switching tube S2, and the second switching tube S2 and the second photovoltaic unit 300 are paralleled with the battery. The continuation of the diode provides a continuation channel for the power bus current.
[0048] As an implementation of the present invention, the first photovoltaic unit 200 includes at least one photovoltaic assembly, and each photovoltaic assembly includes at least one battery substring and a septic diode with a battery sub-string, and the second photovoltaic unit 300 includes at least one photovoltaic. Components, each photovoltaic module includes at least one battery substring and a sectic diode with a string of the battery.
[0049] Hereinafter, a multi-input shuttle device 100 includes a first input terminal 21, a second input terminal 22, a first shutdown module 23, a second shutdown module 24, and an output terminal 26, first shutdown The module 23 includes a first switching tube S1 and a first bypass tube D4, and the second shutdown module 24 includes a second switching tube S2, and the first photovoltaic unit 200 includes a photovoltaic assembly, each photovoltaic module includes three battery substrings and Continued diode with the battery skewers, the second photovoltaic unit 300 includes a photovoltaic assembly, each photovoltaic module comprising three battery substrings and a continuous diode of the battery sub-string, which will be described as an example, but not This is limited.
[0050] Specifically, the first shutoff module 23 includes a first switching tube S1 and a first bypass tube D4, the type of the first bypass tube D4 is a diode. The first switching tube S1 is connected between the positive end of the first input 21 and the positive end of the output terminal 26, the positive end of the source and the output terminal 26, the drain, and the positive end of the first input terminal 21, The first switching tube S1 controls the opening of the first photovoltaic unit 200 and the power bus coupled to the first input terminal 21. The first bypass tube D4 is connected in parallel on the output of the first shutoff module 23, the positive end of the cathode and the output terminal 26, the anode, and the negative end of the first input terminal 21 are connected. When the first photovoltaic unit 200 is abnormal, the first bypass tube D4 is used to provide a continuation channel to the power bus current. The second shutoff module 24 includes a second switching tube S2, and the second switching tube S2 is connected between the negative end of the first input terminal 21 and the positive terminal of the second input terminal 22, the source and the first input terminal 21. The negative end connection, the drain, and the second input terminal 22 are connected to control the connection between the second photovoltaic unit 300 and the power bus coupled to the second input terminal 22. When the second photovoltaic unit 300 is abnormal, the second switching tube S2 and the second photovoltaic unit 300 are supplied with the power bus current together with the battery substring.
[0051] As an implementation of the present invention, the first switching tube S1 can be connected between the negative end of the first input 21 and the positive end of the second input terminal 22, the source and the negative end of the first input terminal 21 are connected. The positive end of the drain and the second input 22 are connected. The second switching tube S2 is coupled between the negative end of the second input terminal 22 and the negative end of the output terminal 26, the negative end of the source and the second input terminal 22, the negative end of the drain, and the output terminal 26.
[0052] As an implementation of the present invention, the control module 25 determines the state of the first photovoltaic unit 200 and the second photovoltaic unit 300 in accordance with the monitoring signal, and the monitoring signal includes an input and output electrical parameters of the shuttle device 100, and the input and output electrical parameters include shutdown. The output voltage of the photovoltaic unit is coupled to each input of the device 100, that is, the first input terminal 21 of the shuttle 100 and the input voltage of the second input terminal 22. When the input voltage or the input voltage of the first input terminal 21 of the shutter 100 is less than a voltage threshold, it is determined that the photovoltaic unit coupled to the input is abnormal, otherwise it is normal. The case of abnormal photovoltaic cells is, for example, blocking, failure, and the like.
[0053] As an implementation of the present invention, the communication signal includes a control command of the shuttle device 100, and the control module 25 adjusts the operating mode of the shuttle device 100, and the operating mode of the shuttle device 100 includes a safe disconnect mode and normal. Operation mode.
[0054] When the shuttle device 100 is in a safe disconnection mode, the control module 25 controls the first switching tube S1 and the second switching tube S2, and the first photovoltaic unit 200 and the second photovoltaic unit 300 are disconnected from the power bus, and The output voltage and power of the crater 100 are in a safe controlled state.
[0055] When the shuttle device 100 is in a normal operating mode, and when the first photovoltaic unit 200 and the second photovoltaic unit 300 are normal, the control module 25 controls the first switching tube S1 to control the second switching tube S2 to conduct or in The high frequency switch state, the first bypass tube D4 reverse cutoff, the first photovoltaic unit 200, the first photovoltaic unit 200 and the second input terminal 22 are connected to the power bus, and turn off The output power of the device 100 is equal to the sum of the output power of the first photovoltaic unit 200 and the second photovoltaic unit 300. When the first photovoltaic unit 200 is abnormal, in order to prevent the control module 25 from power down, the control module 25 controls the first switching tube S1 to open, the first photovoltaic unit 200 and the power bus are disconnected, and the first bypass tube D4 is turned on. The power bus current flows from the first bypass tube D4. When the second photovoltaic unit 300 is abnormal, the control module 25 controls the second switching tube S2 to turn on or in a high frequency switch state, the power bus current from the second photovoltaic unit 300 and the battery sub-string parallel continuous diode and the second switch The tube S2 flows through the second photovoltaic unit 300, and the second switching tube S2 provides a continuation channel for the power bus current. When the second switching tube S2 is in a high frequency switch state, the output capacitance of the second shutdown module 24 is short-lived in the instant, the output capacitance of the second shutdown module 24 is short-lived.
[0056] As an implementation of the present invention, the shuttle device 100 further includes a communication module 27 for demodulation and resolving the communication signal to obtain a control command with an external communication to obtain a communication signal. The communication module 27 is, for example, a power line carrier communication module or a wireless communication module, the type of the communication signal is a power line carrier communication signal or a wireless communication signal. The control module 25 switches the operating mode of the shuttle device 100 in accordance with the control command of the shuttle. In the present embodiment, the form of the communication signal is the power line carrier communication signal.
[0057] As an implementation of the invention, the communication module 27 and the control module 25 can be integrated.
[0058] As an implementation of the present invention, the first shutdown module 23 further includes a first input capacitor CIN1 coupled to the first input terminal 21 and a first output capacitor coup coupled to the positive end of the output terminal 26, first The input capacitor CIN1 is used to stabilize the input voltage of the first input terminal 21 of the shuttle device 100, and the first output capacitor Cout1 is used to stabilize the output voltage of the shuttle device 100. The second shutdown module 24 also includes a second input capacitor CIN2 coupled to the second input terminal 22 and a second output capacitor Cout2 coupled to the negative end of the output terminal 26, and the second input capacitor CIN2 is used to stabilize the shuttle. 100 of the second input voltage of the second input 22, the second output capacitor Cout2 is used to stabilize the output voltage of the shuttle device 100, and the first output capacitor Cout1 and the second output capacitor Cout2 are connected in series to the output 26.
[0059] image 3 A schematic circuit configuration diagram of a multi-input shuttle device 100 for a second embodiment of the present invention, figure 2 In the first embodiment shown, the multi-input shuttle 100 in the present embodiment further includes a second bypass tube D5 parallel to the output terminal 26, and when the control module 25 fails, the second bypass tube D5 is The power bus current provides a continuation channel. When the first photovoltaic unit 200 and the second photovoltaic unit 300 are abnormal, the continuation channel through the second bypass tube D5 is added based on the continuation channel of the first embodiment.
[0060] Specifically, the type of the second sidewalk tube D5 is a diode. When the control module 25 fails, the first switching pipe S1 and the second switching tube S2 are broken, the first bypass tube D4 is turned off, passed by the second bypass The tube D5 provides a continuation channel for the power bus current. When the first photovoltaic unit 200 and the second photovoltaic unit 300 are abnormal, the control module 25 controls the first switching tube S1 to open, the second switching tube S2 is turned on, and the second bypass tube D5 provides a first bar for the power bus current. The continuation channel, the second photovoltaic unit 300 is subjected to the diode of the battery sub-string, and the second switching tube S2 and the first bypass tube D4 provide a second period of time flow for the power bus current.
[0061] As an implementation of the present invention, when the first photovoltaic unit 200 and the second photovoltaic unit 300 are abnormal, the control module 25 controls the first switching tube S1 and the second switching tube S2 to break, the first bypass tube D4 As of the cutoff, the second bypass tube D5 provides a continuation channel for the power bus current.
[0062] The second embodiment is not described in the other of the other of the first embodiment. Adding a bypass tube than the first embodiment, the bypass path is provided in the control module, and the application range is wider. At the same time, when the photovoltaic unit in each input of the shuttle is abnormal, a new side is provided. Road path.
[0063] Figure 4 It is a schematic circuit configuration diagram of a multi-input shuttle device 100 according to a third embodiment of the present invention, and image 3 The first bypass tube D4 type in the first shutdown module 23 shown in the first side of the present embodiment is the third switching tube S3, which is used to reduce the first photovoltaic unit 200 abnormal power bus electrical flow. At the time of conduction loss, the working principle is the second embodiment, and will not be described again.
[0064] Figure 5 A schematic circuit configuration diagram of a multi-input shuttle device 100 of the fourth embodiment of the present invention, image 3The second embodiment shown in the present embodiment further includes a second shutdown module 28 connected to the output terminal 26 in series with the first shutdown module 23 and the second shutdown module 24, The second shutdown module 28 and the second shutdown module 24 are the same, and details are not described herein again. The working principle is not described in the second embodiment. The present embodiment is only three input ports as an example, but it is not limited, may be four, five or other inputs.
[0065] As an implementation of the present invention, the present invention provides a control method of multi-input shutter 100, which is used in a multi-input shutdown having the first input terminal 21 and at least one second input terminal 22, The first input terminal 21 is coupled to the first photovoltaic unit 200, and the second input terminal 22 is coupled to the second photovoltaic unit 300, and the first photovoltaic unit 200 includes at least one battery substring and a continuation of the diode with the battery sub-string, second The photovoltaic unit 300 includes at least one battery substring and a seventh-flowing diode with a string of the battery, which includes:
[0066] Control the conduction and shutdown of the first switching tube S1 and the second switching tube S2 in the multi-input shuttle device 100 according to the monitoring signal and the communication signal;
[0067] When the second photovoltaic unit 200 is abnormal, the second switching tube S2 is controlled, and the second switching tube S2 and the second photovoltaic unit 200 are connected to the battery sub-string to provide a continuation channel for the power bus current.
[0068] According to the monitoring signal, the state of the first photovoltaic unit 200 and the second photovoltaic unit 300 include the input and output electrical parameters of the shuttle device 100, and the input and output electrical parameters comprise the input end of the shutter 100 coupled to the photovoltaic unit. The output voltage, that is, the input voltage of the inputs of the shuttle unit 100, when the input voltage of the input voltage of the shutter 100 is less than a voltage threshold, it is determined that the input terminal is unusually coupled, otherwise it is normal. The case of abnormal photovoltaic cells is, for example, blocking, failure, and the like.
[0069] The communication signal includes a control command of the shuttle device 100, and the operating mode of the shuttle is switched according to the control command. The operating mode of the shuttle device 100 includes a secure disconnect mode and normal operating mode.
[0070] When the shuttle device 100 is in a safe disconnection mode, the first switching tube S1 and the second switching tube S2 are controlled, and the first photovoltaic unit 200 and the second photovoltaic unit 300 are disconnected from the power bus, respectively, the shuttle device 100 The output voltage and power are in a safe controlled state.
[0071] When the shuttle device 100 is in a normal operating mode, when the first photovoltaic unit 200 and the second photovoltaic unit 300 are normal, control the first switching tube S1 is turned on, and the second switching tube S2 is controlled or in a high frequency switch state. The first bypass tube D4 in the shutter 100 reverse, the first photovoltaic unit 200 and the second input terminal 22 are connected in communication with the power bus. The output power of the shutter 100 is equal to the sum of the output power of the first photovoltaic unit 200 and the second photovoltaic unit 300. When the first photovoltaic unit 200 is abnormal, control the first switching tube S1 is disconnected, the first photovoltaic unit 200 and the power bus are disconnected, the first bypass tube D4 is turned on, the power bus current from the first bypass tube D4 stream pass. When the second photovoltaic unit 300 is abnormal, the second switching tube S2 is controlled or in a high frequency switch state, and the power bus current from the second photovoltaic unit 300 is parallel with the battery sub-string and the second switching tube S2 stream. In the case of the continuation flow diode and the second switching tube S2 built into the second photovoltaic unit 300, the power bus current is provided, and when the second switching pipe S2 is in the high frequency switch state, the second switching pipe S2 is disconnected. Instantly, the second output capacitor Cout2 is short-lived.
[0072] Image 6 It is a schematic system block diagram of a photovoltaic power generation system according to an embodiment of the present invention, the system including a plurality of photovoltaic units 60, a plurality of input shutdown, a multi-input shuttle 61, a master 62, and a photovoltaic reverse, as described above, a master 62, and a photovoltaic reverse Volumerator 63, each multi-input shuttle 61 is accessed into a plurality of photovoltaic units 60, and the plurality of multi-input shuttlers 61 are connected in series on a power bus, and the power bus is connected to the DC input port of the photovoltaic inverter 63. The multi-input shuttle includes the first input terminal 21, at least one second input terminal 22, the first shutdown module 23, at least one second shutdown module 24, the control module 25, and the output terminal 26, the first input terminal 21 coupling The first photovoltaic unit 200, the first photovoltaic unit 200 includes at least one battery substring and a sectic diode of the battery sub-string, the second input terminal 22 is coupled to the second photovoltaic unit 300, and the second photovoltaic unit 300 includes at least one. The battery substring and the sectic dixed diode with the battery sub-string, the first shut-off module 23 includes at least the first switching tube S1 and the first bypass tube D4, and the second shutdown module 24 includes at least the second switching tube S2, wherein ,
[0073] The master 62, periodically transmits a communication signal, the communication signal for controlling multiple input shutdown 61,
[0074] Specifically, the communication signal may be a power line carrier communication signal or a wireless communication signal, the power line carrier communication signal coupled to the plurality of input shuttle 61 by a power bus, and the wireless communication signal is coupled to multiple input shutdown by spatial coupling. Merry 61;
[0075] The multi-input shuttle device 61 is configured to control the conductive and shutdown of the first switching tube S1 and the second switching tube S2 according to the monitoring signal and the communication signal, and when the second photovoltaic unit 300 is abnormal, control the second switching tube The S2 is turned on, the second switching tube S2 and the second photovoltaic unit 300 are subjected to a continuous flow channel with the battery sub-string parallel to the power bus current.
[0076] The master 62 can be integrated within the inside of the photovoltaic inverter 63, or can be set independently, but is not limited thereto.
[0077] Although the invention has been disclosed, various embodiments of the present invention have been disclosed, but one of ordinary skill in the art will appreciate that various types Improvement, increase, and replacement are possible.
