Balcony photovoltaic system and communication system applied to balcony photovoltaic system

Abstract

The utility model provides a balcony photovoltaic system and a communication system applied to the same, and relates to the field of photovoltaic technology, the communication system comprises a signal modulation module and a signal demodulation module; the input end of the signal modulation module is connected with the communication end of an inverter in a balcony photovoltaic system and receives system data of the inverter. The output end of the signal modulation module is coupled to the alternating-current side output end of the inverter and outputs a modulation signal of system data to an electric power circuit of which the alternating-current side output end is connected with the household power distribution system; the input end of the signal demodulation module is connected with a household power distribution system and receives a modulation signal; the output end of the signal demodulation module is connected with a preset device and outputs a demodulation signal of the modulation signal to the preset device. According to the utility model, the stability of communication connection between the inverter and the preset equipment can be improved, and the wiring workload is considered.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and more specifically, to a balcony photovoltaic system and a communication system applied to the balcony photovoltaic system. Background Art

[0002] In recent years, with the continuous development of new energy technologies, balcony photovoltaic systems have entered more and more households. In the balcony photovoltaic system, the output end of the photovoltaic module is connected to the DC side of the inverter, and the AC side output end of the inverter is used to connect to the corresponding household power distribution system. The balcony photovoltaic system can convert solar energy into electrical energy and supply power to the household power distribution system.

[0003] In order to meet the needs of users to view the operating data of the balcony photovoltaic system, a Wi-Fi (Wireless Fidelity) module is added to the inverter. After collecting the operating data of the balcony photovoltaic system, the inverter sends the operating data to the preset device in the room through its Wi-Fi module, so that the user can directly or indirectly obtain the operating data through the preset device.

[0004] However, since the Wi-Fi module of the inverter is often far away from the preset device and there are obstacles such as walls, the stability of the communication connection between the two is poor. In order to improve the stability of the communication connection, one solution is to connect one end of a communication extension line of suitable length to the Wi-Fi module of the inverter and place the other end closer to the preset device. However, this solution has the problem of large wiring workload. Therefore, how to improve the stability of the communication connection between the inverter and the preset device while taking into account the wiring workload has become a technical problem that needs to be solved urgently. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a balcony photovoltaic system and a communication system applied to the balcony photovoltaic system, which has the advantages of being able to improve the stability of the communication connection between the inverter and the preset equipment, while taking into account the wiring workload.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides a communication system applied to a balcony photovoltaic system, comprising: a signal modulation module and a signal demodulation module;

[0008] The input end of the signal modulation module is connected to the communication end of the inverter in the balcony photovoltaic system to receive the system data of the inverter;

[0009] The output end of the signal modulation module is coupled to the AC side output end of the inverter, and outputs the modulation signal of the system data to the power line of the AC side output end connected to the household power distribution system;

[0010] The input end of the signal demodulation module is connected to the household power distribution system to receive the modulated signal;

[0011] The output end of the signal demodulation module is connected to a preset device and outputs a demodulated signal of the modulated signal to the preset device.

[0012] Optionally, a first power line carrier communication PLC unit is provided in the signal modulation module;

[0013] The signal demodulation module is provided with a second PLC unit.

[0014] Optionally, the signal demodulation module is integrated into the preset device.

[0015] Optionally, the signal demodulation module is integrated in other household devices except the preset device, and a communication unit is also provided in the signal demodulation module;

[0016] The signal demodulation module is communicatively connected with the preset device through the communication unit.

[0017] Optionally, the other household appliances are: sockets or switch panels.

[0018] Optionally, the communication unit is: a Wi-Fi unit or a wired communication unit.

[0019] Optionally, the system data includes: a subcarrier signal corresponding to a digital quantity, and a subcarrier signal corresponding to an analog quantity.

[0020] Optionally, the preset device is a router;

[0021] The preset device is independent of the communication system; or, the preset device belongs to the communication system, and the preset device further outputs the demodulated signal to a preset server.

[0022] The utility model also provides a balcony photovoltaic system, comprising: at least one photovoltaic component, an inverter and the communication system applied to the balcony photovoltaic system as described above;

[0023] The output end of the photovoltaic module is connected to the DC side of the inverter;

[0024] The AC side output end of the inverter is connected to the household power distribution system corresponding to the balcony photovoltaic system.

[0025] Optionally, the signal modulation module in the communication system is integrated in the inverter.

[0026] It can be seen from the above technical solutions that the communication system applied to the balcony photovoltaic system provided by the utility model, the signal modulation module uses the existing power line as the carrier of signal transmission to realize data transmission with the signal demodulation module, so that the utility model does not need to lay additional communication lines between the signal modulation module and the signal demodulation module, thereby enabling the utility model to reduce the wiring workload; and, because the carrier of signal transmission (i.e., the power line) is stable, the utility model can improve the stability of the communication connection between the signal modulation module and the signal demodulation module, thereby enabling the utility model to improve the stability of the communication connection between the inverter and the preset device. It can be seen that the utility model has the advantages of being able to improve the stability of the communication connection between the inverter and the preset device, while taking into account the wiring workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 It is a wiring diagram of a balcony photovoltaic system;

[0029] Figure 2 is corresponding to Figure 1 The communication diagram of the balcony photovoltaic system;

[0030] Figure 3 The utility model provides a structural schematic diagram of a communication system applied to a balcony photovoltaic system. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In recent years, with the continuous development of new energy technologies, balcony photovoltaic systems have entered more and more households. Figure 1 This is a wiring diagram of a balcony photovoltaic system. Figure 1As shown, the balcony photovoltaic system includes a photovoltaic module 11 and an inverter 12. The output end of the photovoltaic module 11 is connected to the DC side of the inverter 12, and the AC side output end of the inverter 12 is plugged into the socket of the household power distribution system 13 nearby using a dedicated AC plug to achieve connection to the household power distribution system 13. As a "micro plug-in photovoltaic power generation system", the balcony photovoltaic system can convert solar energy into electrical energy and supply power to the household power distribution system 13. In actual applications, the balcony photovoltaic power station is a micro power generation system, and the micro inverters are all installed outdoors. In order not to affect the beauty of the home, it is more recommended to install them on the back bracket of the module.

[0033] The inverter can collect the operating data of the balcony photovoltaic system. In order to meet the needs of users to view the operating data of the balcony photovoltaic system, a Wi-Fi module is added to the inverter. The inverter sends the operating data to the preset device indoors through its Wi-Fi module, so that users can directly or indirectly obtain the operating data through the preset device. Specifically, Figure 2 is corresponding to Figure 1 The communication diagram of the balcony photovoltaic system. Figure 2 As shown, after the inverter 12 collects the operating data of the balcony photovoltaic system, it sends the operating data to the indoor preset device 21 through its Wi-Fi module 121. The operating data includes the switching state of the inverter, the communication connection state between the inverter and the preset device, and the current, voltage, real-time power, real-time power generation, total power generation and AC frequency of the balcony photovoltaic system.

[0034] However, the inverter 12 is installed outdoors, and the preset device is set indoors, so that the Wi-Fi module 121 of the inverter 12 is often far away from the preset device 21, and there are obstacles such as walls, which makes the stability of the communication connection between the two poor, and the communication connection is prone to interruption. This will cause the user to be unable to obtain operating data through the preset device 21, resulting in a poor user experience.

[0035] It should be emphasized that balcony photovoltaic systems are usually installed on outdoor balconies or balcony guardrails. In particular, one of the differences between balconies in the United States and Europe and Chinese balconies is that domestic balconies usually use larger door openings to connect to the living room, while balconies in the United States and Europe mostly have smaller door openings to connect to the interior. In other words, the wall area on the balcony accounts for a larger proportion, so the attenuation of the signal transmitted by the inverter Wi-Fi module is greater, which leads to problems such as unstable signals and interruptions. This results in users being unable to monitor the power station data normally through the APP, and poor user experience, among other drawbacks.

[0036] In order to improve the stability of the communication connection between the inverter 12 and the preset device 21, one solution is: connect one end of a communication extension line of suitable length to the communication port of the inverter 12, and place the other end at a position close to the preset device 21, such as a door or window (this is still outdoors, such as a door opening on a balcony), and then transmit a Wi-Fi signal here to reduce obstacles that the signal passes through during transmission and shorten the wireless communication distance between the inverter 12 and the preset device 21. However, this solution has the problem of large wiring workload.

[0037] Based on this, in order to improve the stability of the communication connection between the inverter and the preset device and take into account the wiring workload, the utility model provides a balcony photovoltaic system and a communication system applied to the balcony photovoltaic system. The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings.

[0038] Figure 3 This is a schematic diagram of the structure of a communication system applied to a balcony photovoltaic system provided by the utility model. Figure 3 As shown, the communication system applied to the balcony photovoltaic system includes: a signal modulation module 31 and a signal demodulation module 32.

[0039] The input end of the signal modulation module 31 is connected to the communication end of the inverter 12 in the balcony photovoltaic system to receive the system data of the inverter 12 (ie the aforementioned operation data).

[0040] The output end of the signal modulation module 31 is coupled to the AC side output end of the inverter 12, and outputs the modulation signal of the system data to the AC side output end connected to the power line of the household power distribution system.

[0041] The input end of the signal demodulation module 32 is connected to the household power distribution system to receive the modulated signal.

[0042] An output end of the signal demodulation module 32 is connected to the preset device 21 , and outputs a demodulated signal of the modulated signal to the preset device 21 .

[0043] Specifically, the AC side output end of the inverter 12 can be inserted into the balcony socket through a corresponding plug to achieve connection with the household power distribution system. The signal modulation module 31 can be integrated in the inverter 12, or it can be independent of the inverter 12. When the signal modulation module 31 is independent of the inverter 12, the signal modulation module 31 and the inverter 12 are both set in the first preset area of ​​the balcony. In this way, by shortening the setting position distance between the signal modulation module 31 and the inverter 12, the communication distance between the two is shortened. Furthermore, when a communication line is used for communication connection between the two, the wiring workload can be reduced, and when the two are wirelessly connected, the stability of the wireless communication connection between the two can be improved.

[0044] The signal demodulation module 32 is arranged indoors, and its input end is inserted into the indoor socket through a corresponding plug to achieve connection with the household power distribution system. The signal demodulation module 32 can be integrated into the preset device 21, or it can be independent of the preset device 21. Based on the same principle as above, when the signal demodulation module 32 is independent of the preset device 21, the signal demodulation module 32 and the preset device 21 are both arranged in the second preset area indoors.

[0045] In the actual working process, the inverter 12 sends the system data of the balcony photovoltaic system it collects to the signal modulation module 31, and the signal modulation module 31 modulates the system data to obtain the modulation signal of the system data, and sends the modulation signal to the power line connected to the household power distribution system at the output end of the AC side. The modulation signal is transmitted to the signal demodulation module 32 along with the current on the power line, and the signal demodulation module 32 separates the modulation signal from the current, and performs signal demodulation on it to obtain the demodulation signal of the modulation signal, and sends the demodulation signal to the preset device 21.

[0046] The embodiment of the utility model adopts the above technical solution, and the signal modulation module uses the existing power line as the carrier of signal transmission to realize data transmission with the signal demodulation module, so that the utility model does not need to lay additional communication lines between the signal modulation module and the signal demodulation module, thereby enabling the utility model to reduce the wiring workload; and, because the carrier of signal transmission (i.e., the power line) is stable, the utility model can improve the stability of the communication connection between the signal modulation module and the signal demodulation module, thereby enabling the utility model to improve the stability of the communication connection between the inverter and the preset device. It can be seen that the utility model has the advantages of being able to improve the stability of the communication connection between the inverter and the preset device, while taking into account the wiring workload.

[0047] In addition, there is also a wired method in the prior art to improve the stability of the communication connection: a hole is opened on the wall of the balcony facing the interior for the communication cable to pass through, and then the communication cable is used to connect the router and the inverter on the balcony in a wired manner.

[0048] The plug-and-play method used in this solution is based on the existing household power lines for carrier communication, so there is no need to make additional holes in the balcony wall facing the interior. Especially when the inverter is integrated with a signal modulation module, it is only necessary to plug the inverter's AC output cable into the balcony socket and set the demodulation and wireless transmission modules at the socket near the router. Even if the inverter does not integrate a signal modulation module, users can easily install the signal modulation module by plugging in connectors. In general, the construction difficulty is greatly reduced, and users can install it independently without professionals or qualifications, ultimately reducing the difficulty of promoting balcony photovoltaic products.

[0049] In the embodiment of the utility model, the signal modulation module 31 is provided with a first PLC (Power Line Communication) unit.

[0050] The signal demodulation module 32 is provided with a second PLC unit.

[0051] Specifically, after receiving the system data sent by the inverter 12, the first PLC unit is used to perform signal modulation on the system data to obtain a modulation signal of the system data, and send the modulation signal to the power line of the household power distribution system connected to the AC side output terminal.

[0052] The second PLC unit is used to separate the modulation signal from the current, and perform signal demodulation on it to obtain a demodulated signal of the modulation signal, and send the demodulated signal to the preset device 21.

[0053] In an embodiment of the utility model, the signal demodulation module 32 can be integrated in the preset device 21, that is, in the preset device 21, the signal demodulation module 32 is already connected to the communication end of the preset device 21, which makes it unnecessary to set up additional equipment for realizing the communication connection between the signal demodulation module 32 and the preset device 21, for example, there is no need to set up an additional communication line between the signal demodulation module 32 and the preset device 21, and there is no need to set up an additional wireless module for realizing the communication connection between the signal demodulation module 32 and the preset device 21.

[0054] In the embodiment of the utility model, the signal demodulation module 32 can also be integrated into other household devices except the preset device 21, and a communication unit is also provided in the signal demodulation module 32.

[0055] The signal demodulation module is communicatively connected with the preset device through the communication unit.

[0056] Specifically, the preset device 21 may be a device that the user already has at home. In some cases, it is not convenient to integrate the signal demodulation module 32 into the preset device 21. For example, the preset device 21 does not support the installation of the signal demodulation module 32, or the process of installing the signal demodulation module 32 in the preset device 21 is relatively complicated and labor-intensive. Therefore, in order to facilitate the installation of the signal demodulation module 32, the signal demodulation module 32 can also be integrated into other household devices other than the preset device 21. For example, the signal demodulation module 32 can also be integrated into a socket or a switch panel, which is more concise in the room compared to a separately set PLC module. At the same time, in order to achieve communication connection between the signal demodulation module 32 and the preset device 21, a communication unit needs to be set in the signal demodulation module 32.

[0057] Furthermore, since the signal demodulation module 32 can be inserted into any socket in the room through its plug, it has high flexibility, so that the utility model can set the signal demodulation module 32 and the preset device 21 in the second preset area in the room in the application scenarios of various setting positions of the preset device 21.

[0058] In the embodiment of the utility model, the communication unit may be: a Wi-Fi unit or a wired communication unit.

[0059] In the embodiment of the utility model, the system data includes: a subcarrier signal corresponding to a digital quantity, and a subcarrier signal corresponding to an analog quantity.

[0060] Specifically, the switching state of the inverter in the system data, and the communication connection state between the inverter and the preset device are digital quantities, and other data (such as the current, voltage, real-time power, real-time power generation, total power generation and AC frequency of the balcony photovoltaic system) are analog quantities. The utility model transmits digital data and analog data with two different subcarrier signals respectively, so that the utility model can reduce the queuing phenomenon during data transmission, thereby enabling the utility model to improve data transmission efficiency.

[0061] In the embodiment of the present invention, the preset device 21 may be a router.

[0062] The preset device 21 is independent of the communication system; or, the preset device 21 belongs to the communication system, and the preset device 21 also outputs a demodulated signal to a preset server.

[0063] Specifically, the preset server may be a cloud server, such as Figure 3 As shown, the preset device 21 is a router, which sends the demodulated signal to the cloud server after receiving the demodulated signal (and the demodulated system data). When the user needs to view the system data of the balcony photovoltaic system, he can use the user terminal to log in to the preset application, and send a system data query instruction to the cloud server through the preset application. After receiving the system data query instruction, the cloud server returns the system data to the user terminal, and the user obtains the system data through the display content of the user terminal. Among them, the user terminal can be an electronic device such as a mobile phone or a computer.

[0064] In addition, the preset device 21 may also be a computer or other electronic device in the prior art that can enable the user to obtain system data.

[0065] Based on a general inventive concept, the utility model also provides a balcony photovoltaic system, comprising: at least one photovoltaic component, an inverter and the communication system applied to the balcony photovoltaic system as described above.

[0066] The output end of the PV module is connected to the DC side of the inverter.

[0067] The AC output end of the inverter is connected to the household power distribution system corresponding to the balcony photovoltaic system.

[0068] In the embodiment of the utility model, the signal modulation module in the communication system can be integrated into the inverter or can be independent of the inverter. As can be seen from the foregoing content, when the signal modulation module is independent of the inverter, the signal modulation module and the inverter are both set in the first preset area of ​​the balcony. In this way, by shortening the setting position distance between the signal modulation module and the inverter, the communication distance between the two is shortened. Furthermore, when a communication line is used for communication connection between the two, the wiring workload can be reduced. When the two are wirelessly connected, the stability of the wireless communication connection between the two can be improved.

[0069] In the embodiment of the utility model, the inverter may be a micro inverter, and the inverter may be inserted into a socket on a balcony connected to a household power distribution system through a plug thereof.

[0070] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other. The modules and submodules in the devices and terminals of each embodiment of the utility model can be merged, divided and deleted according to actual needs, and the features recorded in each embodiment can be replaced or combined.

[0071] In the several embodiments provided by the present utility model, it should be understood that the disclosed terminals and devices can be implemented in other ways. For example, the division of modules or submodules is only a logical function division, and there may be other division methods in actual implementation, such as multiple submodules or modules can be combined or integrated into another module, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms.

[0072] The modules or submodules described as separate components may or may not be physically separated, and the components of the modules or submodules may or may not be physical modules or submodules, that is, they may be located in one place, or they may be distributed on multiple network modules or submodules. Some or all of the modules or submodules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0073] In addition, each functional module or sub-module in each embodiment of the present invention may be integrated into one processing module, or each module or sub-module may exist physically separately, or two or more modules or sub-modules may be integrated into one module.

[0074] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the elements.

[0075] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A communication system applied to a balcony photovoltaic system, characterized in that: include: Signal modulation module and signal demodulation module; The input end of the signal modulation module is connected to the communication end of the inverter in the balcony photovoltaic system to receive the system data of the inverter; The output end of the signal modulation module is coupled to the AC side output end of the inverter, and outputs the modulation signal of the system data to the power line of the AC side output end connected to the household power distribution system; The input end of the signal demodulation module is connected to the household power distribution system to receive the modulated signal; The output end of the signal demodulation module is connected to a preset device and outputs a demodulated signal of the modulated signal to the preset device.

2. The communication system applied to the balcony photovoltaic system according to claim 1, characterized in that: The signal modulation module is provided with a first power line carrier communication PLC unit; The signal demodulation module is provided with a second PLC unit.

3. The communication system applied to the balcony photovoltaic system according to claim 2, characterized in that: The signal demodulation module is integrated in the preset device.

4. The communication system applied to the balcony photovoltaic system according to claim 3, characterized in that: The signal demodulation module is integrated in other household devices except the preset device, and a communication unit is also provided in the signal demodulation module; The signal demodulation module is communicatively connected with the preset device through the communication unit.

5. The communication system applied to the balcony photovoltaic system according to claim 4, characterized in that: The other household equipment is: a socket or a switch panel.

6. The communication system applied to the balcony photovoltaic system according to claim 4, characterized in that: The communication unit is: a Wi-Fi unit or a wired communication unit.

7. The communication system applied to a balcony photovoltaic system according to any one of claims 1 to 6, characterized in that: The system data includes: a subcarrier signal corresponding to a digital quantity and a subcarrier signal corresponding to an analog quantity.

8. The communication system applied to a balcony photovoltaic system according to any one of claims 1 to 6, characterized in that: The preset device is a router; The preset device is independent of the communication system; or, the preset device belongs to the communication system, and the preset device further outputs the demodulated signal to a preset server.

9. A balcony photovoltaic system, characterized in that: include: At least one photovoltaic module, an inverter and a communication system for a balcony photovoltaic system as claimed in any one of claims 1 to 8; The output end of the photovoltaic module is connected to the DC side of the inverter; The AC side output end of the inverter is connected to the household power distribution system corresponding to the balcony photovoltaic system.

10. The balcony photovoltaic system according to claim 9, characterized in that: The signal modulation module in the communication system is integrated in the inverter.

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