CN220210389U - Inverter, combiner box and photovoltaic system - Google Patents
Inverter, combiner box and photovoltaic system Download PDFInfo
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- CN220210389U CN220210389U CN202321459061.5U CN202321459061U CN220210389U CN 220210389 U CN220210389 U CN 220210389U CN 202321459061 U CN202321459061 U CN 202321459061U CN 220210389 U CN220210389 U CN 220210389U
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- 238000004891 communication Methods 0.000 claims abstract description 45
- 238000002955 isolation Methods 0.000 claims abstract description 24
- 238000004804 winding Methods 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 12
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 6
- 230000008054 signal transmission Effects 0.000 abstract description 6
- 230000003993 interaction Effects 0.000 description 17
- 230000005540 biological transmission Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 13
- 239000003990 capacitor Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
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Abstract
The application discloses dc-to-ac converter, collection flow box and photovoltaic system, the dc-to-ac converter includes: the magnetic device, the isolation device and the power carrier communication PLC signal processing circuit; the magnetic device and the direct current cable are mutually coupled with each other, and the first end and the second end of the direct current cable are respectively used for connecting the output end of the combiner box and the input end of the inverter; the magnetic device is connected with the first side of the isolation device; the second side of the isolation device is connected with the PLC signal processing circuit. Therefore, the PLC signals are transmitted between the combiner box and the inverter through the direct-current cable, 485 communication lines do not need to be specially arranged, construction cost is reduced, the PLC signals are transmitted through the direct-current cable, and compared with a wireless communication mode, signal transmission is more stable.
Description
Technical Field
The application relates to the technical field of photovoltaic power generation, in particular to an inverter, a combiner box and a photovoltaic system.
Background
In the photovoltaic system, the photovoltaic array is connected with the inverter through the junction box. The junction box needs to transmit the collected information such as voltage, current and the like to the inverter.
At present, mainly adopt wired 485 communication and wireless communication mode between dc-to-ac converter and the collection flow box, data transmission is more stable when adopting 485 communication, but needs the wiring alone, and is not only with high costs, and the construction is loaded down with trivial details. And if a wireless communication mode is adopted between the inverter and the combiner box, the data transmission is easy to be shielded by a field photovoltaic panel, so that signals are unstable.
Disclosure of Invention
In view of this, the present application provides an inverter, a combiner box, and a photovoltaic system, which can ensure stability of data transmission without separate wiring.
The application provides an inverter, comprising: the magnetic device, the isolation device and the power carrier communication PLC signal processing circuit;
the magnetic device and the direct current cable are mutually coupled with each other, and the first end and the second end of the direct current cable are respectively used for connecting the output end of the combiner box and the input end of the inverter;
the magnetic device is connected with the first side of the isolation device;
the second side of the isolation device is connected with the PLC signal processing circuit.
Preferably, the isolation device is a high-frequency transformer, the magnetic device is connected with a primary winding of the high-frequency transformer, and a secondary winding of the high-frequency transformer is connected with the PLC signal processing circuit.
Preferably, the PLC signal processing circuit includes: a signal amplifying circuit and a host processor;
the host processor is connected with the signal amplifying circuit; the signal amplifying circuit is connected with the high-frequency transformer.
Preferably, the host processor is configured to send a second PLC signal to the signal amplifying circuit;
and the signal amplifying circuit is used for amplifying the power of the second PLC signal and then transmitting the second PLC signal to the high-frequency transformer.
Preferably, the PLC signal processing circuit includes: a signal filtering circuit and a host processor; the two ends of the signal filter circuit are respectively connected with the host processor and the high-frequency transformer.
Preferably, the signal filtering circuit is configured to filter the first PLC signal sent by the high frequency transformer and send the filtered first PLC signal to the host processor.
Preferably, the PLC signal processing circuit further includes: a gating circuit;
the inverter comprises at least two of the following magnetic devices: a first magnetic device and a second magnetic device; the inverter comprises at least two high frequency transformers: a first high frequency transformer and a second high frequency transformer; the first magnetic device is connected with the primary winding of the first high-frequency transformer, and the second magnetic device is connected with the primary winding of the second high-frequency transformer;
the first magnetic device corresponds to the direct current cable connected with the first combiner box, and the second magnetic device corresponds to the direct current cable connected with the second combiner box;
the first end of the gating circuit is connected with the first high-frequency transformer, the second end of the gating circuit is connected with the second high-frequency transformer, and the third end of the gating circuit is connected with the PLC signal processing circuit.
Preferably, the inverter further includes: a controller; the PLC signal processing circuit further includes: 485 communication module;
the host processor is connected with the first end of the 485 communication module, and the second end of the 485 communication module is connected with the controller.
The application also provides a collection flow box, include: the device comprises a magnetic device, an isolation device and a PLC signal processing circuit;
the magnetic device and the direct current cable are mutually coupled with each other, and the first end and the second end of the direct current cable are respectively used for connecting the output end of the combiner box and the input end of the inverter;
the magnetic device is connected with the first side of the isolation device;
the second side of the isolation device is connected with the PLC signal processing circuit.
Preferably, the isolation device is a high-frequency transformer, the magnetic device is connected with a primary winding of the high-frequency transformer, and a secondary winding of the high-frequency transformer is connected with the PLC signal processing circuit. Preferably, the PLC signal processing circuit includes: an amplifier and a slave processor;
and two ends of the amplifier are respectively connected with a secondary winding of the high-frequency transformer and the PLC signal processing circuit.
Preferably, the signal processing circuit includes: a signal filtering circuit and a slave processor;
and two ends of the signal filter circuit are respectively connected with a secondary winding of the high-frequency transformer and the PLC signal processing circuit.
The application also provides a photovoltaic system comprising the inverter and the combiner box.
From this, this application has following beneficial effect:
the inverter provided by the embodiment of the application comprises a magnetic device, an isolation device and a PLC signal processing circuit, wherein the magnetic device can carry out PLC signal interaction with a direct-current cable, the magnetic device can carry out PLC signal interaction with the isolation device, the isolation device can carry out PLC signal interaction with the PLC signal processing circuit, thereby realizing that a busbar box and the inverter are in communication with each other through the direct-current cable, a 485 communication line does not need to be specially arranged, the construction cost is reduced, the direct-current cable is utilized to transmit the PLC signal, and the signal transmission is more stable relative to a wireless communication mode.
Drawings
FIG. 1 is a schematic diagram of a photovoltaic system;
fig. 2 is a schematic diagram of a photovoltaic system according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of an inverter according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of another inverter according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of yet another inverter provided in an embodiment of the present application;
fig. 6 is a schematic diagram of a combiner box according to an embodiment of the present disclosure;
fig. 7 is a schematic view of yet another junction box according to an embodiment of the present disclosure.
Detailed Description
First, the working principle of the system provided by the embodiment of the present application will be described. For ease of understanding, a photovoltaic system is described as an example, it being understood that the photovoltaic system may include a battery, an energy storage converter, etc., in addition to the photovoltaic array, the combiner box, and the inverter, to form a photovoltaic system.
Referring to fig. 1, a schematic diagram of a photovoltaic system is shown.
The inverter is simply referred to as an inverter in this embodiment.
The input terminal of the general inverter 100 is connected to at least one junction box, and since the power of one junction box is limited, the input terminal of the general inverter 100 is connected to a plurality of junction boxes, for example, a first junction box 10 and a second junction box 20 will be described below as an example of at least two junction boxes.
The input end of the first combiner box 10 is connected with the first photovoltaic array PV1, and the input end of the second combiner box 20 is connected with the second photovoltaic array PV2.
In order to avoid patent layout 485 communication line between collection flow box and the dc-to-ac converter, the dc-to-ac converter that this application embodiment provided has included power line carrier communication (PLC, power line communication) host computer, and collection flow box includes the PLC slave unit, makes can realize power line carrier communication between dc-to-ac converter and the collection flow box, directly uses direct current cable to carry out the transmission of PLC signal promptly, need not to lay special 485 communication line, reduces construction cost, and communication signal is stable moreover.
At present, the power carrier communication is widely used in the alternating current side of the string type inverter, and the existing power cable is used as a carrier to communicate, but the power carrier signal is seriously attenuated due to the large capacitance value of the capacitor at the alternating current side of the inverter, so that the PLC communication mode can not be used at the alternating current side like the string type inverter. Considering that the capacitance value of the capacitor of the inverter at the alternating current side is larger, larger attenuation can be caused on the power carrier signal, and the junction box connected with the inverter has no alternating current cable and only has direct current cable, therefore, the technical scheme provided by the embodiment of the application can realize power carrier communication at the direct current side of the inverter, and the direct current cable between the inverter and the junction box is used as a carrier for carrier communication.
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures and detailed description are described in further detail below.
Referring to fig. 2, a schematic diagram of a photovoltaic system according to an embodiment of the present application is shown.
In this embodiment, two junction boxes are described as an example, and it should be understood that the photovoltaic system may also include only one junction box. Each combiner box comprises a PLC slave, i.e. the first combiner box 10 comprises a first PLC slave a, the second combiner box B comprises a second PLC slave B, the inverter 100 comprises a PLC host C, and the PLC host C can perform PLC signal interaction with the first PLC slave a and also perform PLC signal interaction with the second PLC slave B.
Fig. 2 is merely illustrative, and the photovoltaic system may also include a greater number of junction boxes.
In order for those skilled in the art to better understand and practice the inverter provided in the embodiments of the present application, the implementation of the inverter is described in detail below with reference to the accompanying drawings.
Referring to fig. 3, a schematic diagram of an inverter according to an embodiment of the present application is shown.
The inverter provided by the embodiment of the application comprises: a magnetic device M, a high-frequency transformer T and a power carrier communication PLC signal processing circuit 101;
the magnetic device M and the direct current cable are mutually coupled with each other, and the first end and the second end of the direct current cable are respectively used for connecting the output end of the combiner box and the input end of the inverter;
the connection mode of the magnetic device M and the dc cable is not particularly limited in the embodiment of the present application, and may be, for example, contact connection or non-contact connection. For example, one implementation form of the magnetic device M is a magnetic ring, and the magnetic ring is sleeved outside the direct current cable, and performs magnetic field interaction with the direct current cable, so that PLC signals can be interacted. The power signal transmitted by the dc cable is a dc signal, and the PLC signal is a high-frequency ac signal, so that the PLC signal can be transmitted to the PLC signal processing circuit 101 through the high-frequency transformer T, and besides the transformation function, the high-frequency transformer T can also realize signal isolation. The high-frequency transformer T can meet the requirements of safety regulations, reduce the coupling energy of PLC signals, ensure the transmission distance and realize long-distance transmission.
The magnetic device M may be sleeved outside the positive cable pv+ of the dc cable, or may be sleeved outside the negative cable PV-of the dc cable, which is not specifically limited in this application, and in this embodiment, the magnetic device M is sleeved outside the pv+.
The magnetic device M is connected to the primary winding of the high frequency transformer T.
The secondary winding of the high-frequency transformer T is connected with a PLC signal processing circuit 101.
The embodiment of the application does not specifically limit the transmission mode of the PLC signal, that is, the PLC signal processing circuit can send the PLC signal to the magnetic device M, and also can receive the PLC signal from the magnetic device M, that is, the inverter can send the PLC signal to the combiner box, and the combiner box can also send the PLC signal to the inverter. The general combiner box can receive the command sent by the inverter, and feed back data to the inverter according to the command.
The magnetic device M is also used for transmitting the first PLC signal coupled from the direct current cable to the high-frequency transformer T or receiving the second PLC signal transmitted by the high-frequency transformer T and coupling the second PLC signal to the direct current cable;
the PLC signal processing circuit 101 is configured to receive the first PLC signal transmitted from the high frequency transformer T, or to transmit the second PLC signal to the high frequency transformer T.
An implementation of one inverter corresponding to a plurality of junction boxes is described below with reference to the accompanying drawings.
Referring to fig. 4, a schematic diagram of another inverter according to an embodiment of the present application is shown.
The inverter provided by the embodiment of the application comprises at least two magnetic devices: a first magnetic device M1 and a second magnetic device M2; the inverter comprises at least two high frequency transformers: a first high-frequency transformer T1 and a second high-frequency transformer T2; the first magnetic device M1 is connected with the primary winding of the first high-frequency transformer T1, and the second magnetic device M2 is connected with the primary winding of the second high-frequency transformer;
the first magnetic device M1 corresponds to a positive cable PV < 1+ > of a direct current cable connected with the first combiner box, and the second magnetic device M2 corresponds to a positive cable PV < 2+ > of a direct current cable connected with the second combiner box; it should be understood that the first magnetic device M1 corresponds to the negative cable PV 1-of the direct current cable to which the first combiner box is connected and the second magnetic device M2 corresponds to the negative cable PV 2-of the direct current cable to which the second combiner box is connected.
The PLC signal processing circuit needs to perform PLC signal interaction with M1 and M2, respectively, and a specific implementation manner is described below with reference to the accompanying drawings.
Referring to fig. 5, a schematic diagram of yet another inverter according to an embodiment of the present application is provided.
In this application embodiment also provides a PLC host of an inverter, the PLC signal processing circuit includes: a signal amplification circuit 1011 and a host processor 1013;
the host processor 1013 is connected with the signal amplifying circuit; the signal amplification circuit 1011 is connected to a high-frequency transformer. The host processor 1013 is the core of the PLC host, and is responsible for debugging and demodulation of PLC signals, channel selection of a gating circuit, 485 communication with a controller, and the like.
A host processor 1013 for transmitting the second PLC signal to the signal amplifying circuit 1011;
the signal amplifying circuit 1011 is configured to power-amplify the second PLC signal and send the amplified signal to the high-frequency transformer, i.e., to either T1 or T2, depending on the selected path of the gating circuit 1014. The signal amplification circuit 1011 ensures that the amplitude of the PLC signal still satisfies the demodulation condition when the PLC signal reaches the PLC slave in the combiner box.
The PLC signal processing circuit further includes: a gating circuit 1014;
a first end of the gating circuit 1014 is connected to the first high-frequency transformer T1, a second end of the gating circuit 1014 is connected to the second high-frequency transformer T2, a third end of the gating circuit 1014 is connected to the PLC signal processing circuit, and specifically, a third end of the gating circuit 1014 is connected to the signal amplifying circuit 1011 and the signal filtering circuit 1012 in the PLC signal processing circuit. It should be appreciated that the third terminal of the gating circuit 1014 may include multiple ports and that the signal amplification circuit 1011 and the signal filtering circuit 1012 may be connected to different ports of the gating circuit 1014.
The gating circuit 1014 is used for switching corresponding channels according to the information of the PLC slave in the bus box with the specific number to be obtained by the host processor, so that a signal transmission channel between the PLC host and the PLC slave is opened for PLC signal transmission. The gating circuit 1014 facilitates expanding the communication channel without requiring multiple carrier chips to participate in the operation, thereby reducing hardware costs.
In addition, the PLC signal processing circuit includes: a signal filtering circuit 1012 and a host processor 1013; both ends of the signal filter circuit 1012 are connected to the host processor 1013 and the high frequency transformer, respectively. Specifically, the signal filter circuit 1012 is connected to a high-frequency transformer through the gate circuit 1014.
The signal filter circuit 1012 is configured to filter the first PLC signal sent from the high frequency transformer and send the filtered first PLC signal to the host processor 1013.
The signal filtering circuit 1012 is used to filter out noise so that the host processor can demodulate the PLC signal.
The PLC host of the inverter provided in the embodiment of the present application may further perform signal interaction with a controller of the inverter, for example, the inverter further includes: a controller (not shown in the figure); the PLC signal processing circuit further includes: 485 communication module 1015;
the host processor 1013 is connected to a first end of the 485 communication module 1015, and a second end of the 485 communication module 1015 is connected to the controller.
485 communication module is used for carrying out data interaction with the controller, accomplishes the transmission of each collection flow box collection data.
The power module 1016 is configured to provide a stable power source for the PLC host to function properly.
The implementation manner of the gating circuit 1014 is not particularly limited in the embodiments of the present application, and may be, for example, a built integrated circuit or a special processing circuit.
The inverter provided by the embodiment of the application comprises a magnetic device, a high-frequency transformer and a PLC signal processing circuit, wherein the magnetic device can carry out PLC signal interaction with a direct-current cable, the magnetic device can carry out PLC signal interaction with the high-frequency transformer, the high-frequency transformer can carry out PLC signal interaction with the PLC signal processing circuit, thereby realizing that a busbar box and the inverter are in communication with each other through the direct-current cable, a 485 communication line is not required to be specially arranged, the construction cost is reduced, the direct-current cable is utilized to transmit the PLC signal, and the signal transmission is more stable relative to a wireless communication mode.
Based on the inverter provided in the above embodiments, the embodiments of the present application further provide a combiner box, which is described in detail below with reference to the accompanying drawings.
Referring to fig. 6, a schematic diagram of a combiner box according to an embodiment of the present application is shown.
The collection flow box that this application embodiment provided includes: a magnetic device M, a high-frequency transformer T and a PLC signal processing circuit 11;
the magnetic device M and the direct current cable are mutually coupled with each other, and the first end and the second end of the direct current cable are respectively used for connecting the output end of the combiner box and the input end of the inverter; the magnetic device M converts the voltage signal modulated by the PLC signal processing circuit 11 into a current signal through the magnetic device, and couples the current signal to the dc cable.
The magnetic device M is connected with a primary winding of the high-frequency transformer T;
the connection mode of the magnetic device M and the dc cable is not particularly limited in the embodiment of the present application, and may be, for example, contact connection or non-contact connection. For example, one implementation form of the magnetic device M is a magnetic ring, and the magnetic ring is sleeved outside the direct current cable, and performs magnetic field interaction with the direct current cable, so that PLC signals can be interacted. The electric energy signal transmitted by the direct current cable is a direct current signal, and the PLC signal is a high-frequency alternating current signal, so that the PLC signal can be transmitted to the PLC signal processing circuit 11 through the high-frequency transformer T, and besides the transformation effect, the high-frequency transformer T can realize signal isolation. The high-frequency transformer T can meet the requirements of safety regulations, reduce the coupling energy of PLC signals, ensure the transmission distance and realize long-distance transmission.
The secondary winding of the high-frequency transformer T is connected with a PLC signal processing circuit 11. It should be understood that the PLC signal processing circuit in fig. 6 is not identical to the PLC signal processing circuit in fig. 3, fig. 3 illustrates a PLC master located inside an inverter, and fig. 6 illustrates a PLC slave located inside a combiner box.
The utility model provides a collection flow box, including magnetic device, high frequency transformer and PLC signal processing circuit, magnetic device can carry out PLC signal interaction with the direct current cable, magnetic device can carry out PLC signal interaction between the high frequency transformer, carry out PLC signal interaction between high frequency transformer and the PLC signal processing circuit, thereby realize between collection flow box and the dc-to-ac converter through direct current cable transmission PLC signal, need not to lay 485 communication lines specially, reduce construction cost, utilize direct current cable transmission PLC signal moreover, for wireless communication mode, signal transmission is more stable.
Referring to fig. 7, a schematic diagram of still another header box according to an embodiment of the present application is provided.
The embodiment of the application provides a collection flow box, and signal processing circuit includes: an amplifier 113 and a slave processor 111;
the slave processor 111 is the core of the PLC slave and is responsible for carrier signal debugging and demodulation and interaction of acquisition information with the combiner box control board.
Both ends of the amplifier 113 are respectively connected with the secondary winding of the high-frequency transformer T and the slave processor 111 in the PLC signal processing circuit, and specifically connected with a transmitting pin of the slave processor 111.
The amplifier 113 amplifies the power of the PLC signal modulated by the slave processor 111, so as to ensure that the signal amplitude when the PLC signal reaches the PLC host still satisfies the demodulation condition.
The PLC signal processing circuit comprises: a signal filter circuit 112 and a slave processor 111;
both ends of the signal filter circuit 112 are respectively connected with the secondary winding of the high-frequency transformer T and the slave processor 111 in the PLC signal processing circuit, and are specifically connected with the receiving pin of the slave processor 111.
Based on the inverter and the combiner box provided in the above embodiments, the embodiments of the present application further provide a photovoltaic system, which is described in detail below with reference to the accompanying drawings.
With specific continued reference to fig. 2, the photovoltaic system provided in the embodiments of the present application includes the inverter and the combiner box described in the above embodiments.
The photovoltaic system provided by the embodiment of the application adopts the magnetic device to convert the voltage type carrier signal into the current type carrier signal, and the current type carrier signal is coupled to the direct current cable for transmission, so that the problems that the capacitance value of the direct current side capacitor of the inverter is large, the voltage carrier signal is added to the power line, the signal is absorbed by the capacitor, and the error rate is high are avoided. In addition, the gating circuit is convenient for expanding the communication channel, and a plurality of carrier chips are not required to participate in work; in addition, 485 communication cables are not required to be arranged on site, and the data transmission between the combiner box and the inverter can be completed by using the existing direct current power line; the carrier communication mode also solves the problem that the wireless communication mode signal is easy to be shielded by the photovoltaic panel, so that poor communication is caused.
It should be noted that, in the present description, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different manner from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system or device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (13)
1. An inverter, comprising: the magnetic device, the isolation device and the power carrier communication PLC signal processing circuit;
the magnetic device and the direct current cable are mutually coupled with each other, and the first end and the second end of the direct current cable are respectively used for connecting the output end of the combiner box and the input end of the inverter;
the magnetic device is connected with the first side of the isolation device;
and the second side of the isolation device is connected with the PLC signal processing circuit.
2. The inverter of claim 1, wherein the isolation device is a high frequency transformer, the magnetic device is connected to a primary winding of the high frequency transformer, and a secondary winding of the high frequency transformer is connected to the PLC signal processing circuit.
3. The inverter of claim 2, wherein the PLC signal processing circuit comprises: a signal amplifying circuit and a host processor;
the host processor is connected with the signal amplifying circuit; the signal amplifying circuit is connected with the high-frequency transformer.
4. The inverter of claim 3, wherein the host processor is configured to send a second PLC signal to the signal amplification circuit;
and the signal amplifying circuit is used for amplifying the power of the second PLC signal and then sending the amplified second PLC signal to the high-frequency transformer.
5. The inverter of claim 2, wherein the PLC signal processing circuit comprises: a signal filtering circuit and a host processor; and two ends of the signal filtering circuit are respectively connected with the host processor and the high-frequency transformer.
6. The inverter of claim 5, wherein the signal filtering circuit is configured to filter the first PLC signal sent by the high frequency transformer and send the filtered first PLC signal to the host processor.
7. The inverter according to any one of claims 2 to 6, wherein the PLC signal processing circuit further comprises: a gating circuit;
the inverter comprises at least two of the following magnetic devices: a first magnetic device and a second magnetic device; the inverter comprises at least two high frequency transformers: a first high frequency transformer and a second high frequency transformer; the first magnetic device is connected with the primary winding of the first high-frequency transformer, and the second magnetic device is connected with the primary winding of the second high-frequency transformer;
the first magnetic device corresponds to a direct current cable connected with the first combiner box, and the second magnetic device corresponds to a direct current cable connected with the second combiner box;
the first end of the gating circuit is connected with the first high-frequency transformer, the second end of the gating circuit is connected with the second high-frequency transformer, and the third end of the gating circuit is connected with the PLC signal processing circuit.
8. The inverter of claim 5, further comprising: a controller; the PLC signal processing circuit further comprises: 485 communication module;
the host processor is connected with the first end of the 485 communication module, and the second end of the 485 communication module is connected with the controller.
9. A combiner box, comprising: the device comprises a magnetic device, an isolation device and a PLC signal processing circuit;
the magnetic device and the direct current cable are mutually coupled with each other, and the first end and the second end of the direct current cable are respectively used for connecting the output end of the combiner box and the input end of the inverter;
the magnetic device is connected with the first side of the isolation device;
and the second side of the isolation device is connected with the PLC signal processing circuit.
10. The combiner box according to claim 9, wherein the isolation device is a high frequency transformer, the magnetic device is connected to a primary winding of the high frequency transformer, and a secondary winding of the high frequency transformer is connected to the PLC signal processing circuit.
11. The combiner box of claim 10, wherein the PLC signal processing circuit comprises: an amplifier and a slave processor;
and two ends of the amplifier are respectively connected with the secondary winding of the high-frequency transformer and the PLC signal processing circuit.
12. The combiner box of claim 10, wherein the signal processing circuitry comprises: a signal filtering circuit and a slave processor;
and two ends of the signal filtering circuit are respectively connected with the secondary winding of the high-frequency transformer and the PLC signal processing circuit.
13. A photovoltaic system comprising the inverter of any one of claims 1-8 and the combiner box of any one of claims 9-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321459061.5U CN220210389U (en) | 2023-06-07 | 2023-06-07 | Inverter, combiner box and photovoltaic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321459061.5U CN220210389U (en) | 2023-06-07 | 2023-06-07 | Inverter, combiner box and photovoltaic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220210389U true CN220210389U (en) | 2023-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321459061.5U Active CN220210389U (en) | 2023-06-07 | 2023-06-07 | Inverter, combiner box and photovoltaic system |
Country Status (1)
| Country | Link |
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| CN (1) | CN220210389U (en) |
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2023
- 2023-06-07 CN CN202321459061.5U patent/CN220210389U/en active Active
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