Photovoltaic system

Abstract

The utility model discloses a photovoltaic system which comprises a roof photovoltaic module and an auxiliary photovoltaic module, the roof photovoltaic module comprises a plurality of photovoltaic tiles, the photovoltaic tiles are wavy, and the auxiliary photovoltaic module comprises at least one of a shed photovoltaic module, a balcony photovoltaic module, a sunshade photovoltaic module and a fence photovoltaic module. And the auxiliary photovoltaic module is connected in parallel with the roof photovoltaic module. According to the photovoltaic system provided by the embodiment of the invention, the roof photovoltaic module and the auxiliary photovoltaic module are arranged at the same time, so that the photovoltaic system can be arranged in multiple scenes at the same time, the space utilization rate is improved, the multiple scenes generate power at the same time, the generated power of the photovoltaic system is improved, and the photovoltaic system can meet larger power utilization requirements; and the reliability of the photovoltaic system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic power generation, and more specifically, to a photovoltaic system. Background Art

[0002] In the related art, household photovoltaic systems are usually installed on the roof. Limited by the area of ​​the roof, the power generation of household photovoltaic power generation and energy storage systems is usually low and cannot meet the larger power demand. Utility Model Content

[0003] An embodiment of the present application provides a photovoltaic system.

[0004] A photovoltaic system according to an embodiment of the present application includes:

[0005] A rooftop photovoltaic assembly, wherein the rooftop photovoltaic assembly comprises a plurality of photovoltaic tiles, and the photovoltaic tiles are wavy;

[0006] Auxiliary photovoltaic components, the auxiliary photovoltaic components include at least one of carport photovoltaic components, balcony photovoltaic components, awning photovoltaic components and fence photovoltaic components, and the auxiliary photovoltaic components are connected in parallel with the roof photovoltaic components.

[0007] The photovoltaic system proposed in the embodiment of the present application, by simultaneously setting up rooftop photovoltaic components and auxiliary photovoltaic components, allows the photovoltaic system to be set up in multiple scenes at the same time, thereby improving space utilization, and multiple scenes generate electricity at the same time, which increases the power generation capacity of the photovoltaic system, allowing the photovoltaic system to meet greater electricity demands, which is beneficial to improving the reliability of the photovoltaic system.

[0008] In some embodiments, the photovoltaic system further includes a photovoltaic DC combiner box, and the roof photovoltaic assembly and the auxiliary photovoltaic assembly are respectively connected to the photovoltaic DC combiner box.

[0009] In this way, the PV DC combiner box can aggregate the wiring and reduce the number of subsequent wiring connections. Only one wire from the PV DC combiner box needs to be connected to the subsequent circuit to achieve the connection.

[0010] In some embodiments, the rooftop photovoltaic assembly further includes a plurality of first power optimizers, each of the first power optimizers is connected in series with a corresponding photovoltaic tile, and the plurality of first power optimizers are connected in series.

[0011] In this way, the first power optimizer solves the problem of PV tile voltage mismatch, which helps to ensure the maximum output power of the rooftop PV modules.

[0012] In some embodiments, the input voltage of the first power optimizer is 4-7V.

[0013] In this way, the first power optimizer can adapt to the voltage requirements of the photovoltaic tiles, which is conducive to finding the maximum power point more efficiently.

[0014] In some embodiments, the auxiliary photovoltaic assembly includes the carport photovoltaic assembly, the balcony photovoltaic assembly, the awning photovoltaic assembly, and the fence photovoltaic assembly.

[0015] In this way, setting up a variety of auxiliary photovoltaic components at the same time can enable the photovoltaic system to be deployed in more scenarios and improve power generation efficiency.

[0016] In some embodiments, the carport photovoltaic assembly includes a plurality of photovoltaic panels and a plurality of second power optimizers, each of the second power optimizers is connected in series with the corresponding photovoltaic panel, and the plurality of second power optimizers are connected in series.

[0017] In this way, the power optimizer solves the voltage mismatch problem of the photovoltaic panels, which helps to ensure the maximum output power of the carport photovoltaic components.

[0018] In some embodiments, the photovoltaic system also includes a grid-connected inverter module, which includes a connected DC / DC circuit and a grid-connected inverter circuit, the DC / DC circuit is electrically connected to the rooftop photovoltaic component and the auxiliary photovoltaic component, and the grid-connected inverter circuit is connected to the power grid.

[0019] In this way, the direct current generated by the rooftop photovoltaic components and the auxiliary photovoltaic components can be converted into alternating current and finally output to the power grid, thereby generating some income for the user.

[0020] In some embodiments, the photovoltaic system also includes an intelligent control module and an energy storage module, the intelligent control module includes a control unit and an energy storage charging unit, the control unit is respectively connected to the DC / DC circuit, the energy storage charging unit is connected to the control unit, and the energy storage charging unit is connected to the energy storage module, and the control unit is configured as follows: when the energy storage module is fully charged or reaches a predetermined threshold, the grid-connected inverter circuit is connected to the grid; when the grid is powered off, the grid-connected inverter circuit is disconnected from the grid.

[0021] In this way, the photovoltaic system can better adapt to the electricity demand in different situations.

[0022] In some embodiments, the intelligent control module further includes a communication module, the communication module is electrically connected to the control unit, and the communication module is used to transmit the parameters of the photovoltaic system to a remote terminal.

[0023] In this way, data collection and monitoring of the photovoltaic system can be achieved.

[0024] In some embodiments, the photovoltaic system further includes a load, the load is connected to the control unit, and the control unit is configured such that when the light intensity is less than a preset value, the control unit is connected to the power grid so that the power grid can supply power to the load.

[0025] In this way, when the weather is bad, it is possible to connect to the grid to avoid being unable to guarantee electricity demand.

[0026] In some embodiments, the photovoltaic system also includes a buck-boost circuit module, which includes a DC / DC buck circuit, a DC / AC boost circuit and an LC filter, the DC / DC buck circuit and the DC / AC boost circuit are respectively connected to the intelligent control module, the load includes a DC load and an AC load, the DC / DC buck circuit is connected to the DC load, and the DC / AC boost circuit is connected to the AC load through the LC filter.

[0027] In this way, the photovoltaic system can have a wider variety of loads to meet different electricity demands.

[0028] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 is a schematic structural diagram of a photovoltaic system according to an embodiment of the present application;

[0031] Figure 2 is a framework diagram of a rooftop photovoltaic assembly of a photovoltaic system according to an embodiment of the present application;

[0032] Figure 3 It is a framework diagram of a carport photovoltaic assembly of a photovoltaic system according to an embodiment of the present application;

[0033] Figure 4 It is a framework diagram of a photovoltaic system according to an embodiment of the present application.

[0034] Description of main component symbols: photovoltaic system 100, roof photovoltaic module 10, photovoltaic tile 11, first power optimizer 12, auxiliary photovoltaic module 20, carport photovoltaic module 21, photovoltaic panel 211, second power optimizer 212, balcony photovoltaic module 22, awning photovoltaic module 23, fence photovoltaic module 24, grid-connected inverter module 30, DC / DC circuit 31, grid-connected inverter circuit 32, intelligent control module 40, control unit 41, energy storage charging unit 42, communication module 43, energy storage module 50, load 60, DC load 61, AC load 62, power grid 70, buck-boost circuit module 80, DC / DC buck circuit 81, DC / AC boost circuit 82, LC filter 83, photovoltaic DC combiner box 90. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. In the description of the present invention, it is necessary to understand that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] The disclosure herein provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described herein. Of course, they are merely examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art may appreciate the application of other processes and / or the use of other materials.

[0039] With the advent of the intelligent and information age, the demand for electricity has greatly increased. In order to alleviate the pressure of environmental pollution and energy consumption, the world is looking for green power generation methods and placing high hopes on photovoltaic power generation. With the support of policies and the advantages of photovoltaic energy storage in reducing power generation costs, household photovoltaic power generation and energy storage systems are gradually entering thousands of households.

[0040] In the related art, household photovoltaic systems are usually installed on the roof. Limited by the area of ​​the roof, the power generation of household photovoltaic power generation and energy storage systems is usually low and cannot meet the larger power demand.

[0041] See also Figure 1 A photovoltaic system 100 according to an embodiment of the present application includes a roof photovoltaic component 10 and an auxiliary photovoltaic component 20. The roof photovoltaic component 10 includes a plurality of photovoltaic tiles 11, and the photovoltaic tiles 11 are wavy. The auxiliary photovoltaic component 20 includes at least one of a carport photovoltaic component 21, a balcony photovoltaic component 22, an awning photovoltaic component 23 and a fence photovoltaic component 24. The auxiliary photovoltaic component 20 is connected in parallel with the roof photovoltaic component 10.

[0042] The photovoltaic system 100 proposed in the embodiment of the present application, by simultaneously setting up a rooftop photovoltaic component 10 and an auxiliary photovoltaic component 20, allows the photovoltaic system 100 to be set up in multiple scenes at the same time, thereby improving space utilization, and multiple scenes generate electricity at the same time, thereby improving the power generation capacity of the photovoltaic system 100, so that the photovoltaic system 100 can meet a greater electricity demand, which is beneficial to improving the reliability of the photovoltaic system 100.

[0043] Specifically, the photovoltaic system 100 of the present application is a household photovoltaic system 100. In an embodiment of the present application, the roof photovoltaic component 10 is set on the roof, the carport photovoltaic component 21 is set on the top of the carport, the balcony photovoltaic component 22 is set on the balcony railing, the awning photovoltaic component 23 is set on the top of the awning, and the fence photovoltaic component 24 is set on the fence.

[0044] Photovoltaic tiles 11, also known as solar tiles, are a new type of roofing material that combines architecture with new energy technologies. Photovoltaic tiles 11 use the principle of photovoltaic power generation to directly convert light energy into electrical energy through the photovoltaic effect of the semiconductor interface.

[0045] Specifically, when light shines on a solar cell and is absorbed in the interface layer, photons with sufficient energy can excite electrons from covalent bonds in P-type silicon and N-type silicon, generating electron-hole pairs. These electrons and holes are separated from each other by the electric field of the space charge before they recombine, forming an electric current.

[0046] The photovoltaic tile 11 is mainly made of crystalline silicon or amorphous silicon material, and the photovoltaic tile 11 made of amorphous silicon material is more beautiful in visual effect. It embeds the photovoltaic module into the supporting structure, so that the solar panel and the building material are integrated, and can be directly applied to the roof.

[0047] The photovoltaic tile 11 is a wavy curved structure, and the concave parts of the curved surface can allow rainwater to flow away quickly. Arranging multiple photovoltaic tiles 11 is conducive to improving power generation efficiency and enhancing energy stability.

[0048] In some embodiments, the photovoltaic system 100 further includes a photovoltaic DC combiner box 90 , and the roof photovoltaic assembly 10 and the auxiliary photovoltaic assembly 20 are respectively connected to the photovoltaic DC combiner box 90 .

[0049] In this way, the photovoltaic DC combiner box 90 can aggregate the wiring and reduce the number of subsequent wirings. Only one wire from the photovoltaic DC combiner box 90 needs to be connected to the subsequent circuit to achieve the connection.

[0050] Specifically, the rooftop photovoltaic components 10 and the auxiliary photovoltaic components 20 are connected in parallel to the photovoltaic DC junction box 90. In order to improve the reliability and practicality of the system, a photovoltaic-specific DC lightning protection module, DC fuses and circuit breakers are configured in the photovoltaic DC junction box 90. A monitoring function module can also be installed to facilitate users to grasp the working conditions of the photovoltaic components in a timely and accurate manner, thereby ensuring that the solar photovoltaic power generation system can achieve maximum effectiveness.

[0051] See also Figure 2 In some embodiments, the rooftop photovoltaic assembly 10 further includes a plurality of first power optimizers 12, each first power optimizer 12 is connected in series with a corresponding photovoltaic tile 11, and a plurality of first power optimizers 12 are connected in series.

[0052] In this way, the first power optimizer 12 solves the voltage mismatch problem of the photovoltaic tiles 11 , which is beneficial to ensuring the maximum output power of the rooftop photovoltaic components 10 .

[0053] Specifically, the power optimizer is an electric device mainly used in the photovoltaic system 100 to improve the efficiency of electric energy use and the performance of photovoltaic modules. It has a maximum power point tracking (MPPT) function, which can track the maximum power point of a single photovoltaic module in real time to ensure that the module is always in the optimal working state. It can solve the problem of reduced power generation of the photovoltaic system 100 caused by shadow shading, differences in module orientation or inconsistent module attenuation, and improve system efficiency.

[0054] In the embodiment of the present application, since the photovoltaic tile 11 is a curved structure, there are light-receiving surfaces and non-light-receiving surfaces, and the output currents of the light-receiving surfaces and the non-light-receiving surfaces are inconsistent, the power generation of the photovoltaic tile 11 is unstable. Due to the inconsistency of the output currents of the light-receiving surface and the non-light-receiving surface, unbalanced currents and voltages may be generated between multiple photovoltaic tiles 11, which will affect the efficiency and reliability of the entire photovoltaic system 100. The first power optimizer 12 can dynamically adjust according to factors such as light intensity, temperature, and shadow to ensure that each photovoltaic tile 11 generates stable current and voltage, thereby improving the efficiency and reliability of the photovoltaic system 100. At the same time, the first power optimizer 12 can track the maximum power point in real time under different lighting conditions by using the maximum power point tracking (MPPT) technology, thereby improving the power generation efficiency of the photovoltaic system 100. The MPPT controller is the core part of the second power optimizer 212. It uses the "scanning method" technology to continuously adjust the voltage and current in the circuit to find the best matching combination point to achieve maximum power generation.

[0055] Further, in the embodiment of the present application, the input and output of a single photovoltaic tile 11 are directly connected to the adjacent first power optimizer 12, and the output of a single first power optimizer 12 is connected to the input of the next single first power optimizer 12, and the connections are made in sequence, so that the photovoltaic tile 11 is connected in series with the first power optimizer 12, and multiple second power optimizers 212 are connected in series. The head and tail connection lines of multiple first power optimizers 12 connected in series are the total output and total input of the roof photovoltaic assembly 10.

[0056] In some embodiments, the input voltage of the first power optimizer 12 is 4V to 7V.

[0057] In this way, the first power optimizer 12 can adapt to the voltage requirement of the photovoltaic tile 11, which is conducive to finding the maximum power point more efficiently.

[0058] Specifically, the input voltage of a common power optimizer may vary according to the specific equipment model and specifications, but the minimum value of the input voltage of the power optimizer is usually 8 to 12V. Since the voltage of a single photovoltaic tile 11 is relatively low, only 4 to 7V, in order to adapt to the voltage requirements of the photovoltaic tile 11, in the embodiment of the present application, the input voltage of the first power optimizer 12 is 4 to 7V, which is lower than the voltage range of conventional optimizers on the market. Furthermore, the first power optimizer 12 in the embodiment of the present application belongs to the low-voltage gear and does not need to be adjusted in the high-voltage gear, and can more efficiently find the maximum power point.

[0059] See also Figure 1 In some embodiments, the auxiliary photovoltaic assembly 20 includes a carport photovoltaic assembly 21 , a balcony photovoltaic assembly 22 , an awning photovoltaic assembly 23 and a fence photovoltaic assembly 24 .

[0060] In this way, by simultaneously providing a variety of auxiliary photovoltaic components 20 , the photovoltaic system 100 can be deployed in more scenarios, thereby improving power generation efficiency.

[0061] Specifically, the auxiliary photovoltaic components 20 simultaneously set up the carport photovoltaic components 21, the balcony photovoltaic components 22, the awning photovoltaic components 23 and the fence photovoltaic components 24 to cover almost all outdoor locations where photovoltaic power generation equipment can be set up, which is conducive to maximizing the power generation efficiency, so that the photovoltaic system 100 can meet greater electricity needs.

[0062] In the embodiment of the present application, the balcony photovoltaic assembly 22, the awning photovoltaic assembly 23 and the fence photovoltaic assembly 24 all include multiple solar panels. Furthermore, each solar panel can be connected to a corresponding power optimizer, which can dynamically adjust according to factors such as light intensity, temperature, and shadow to ensure that each solar panel generates stable current and voltage.

[0063] See also Figure 3In some embodiments, the carport photovoltaic assembly 21 includes a plurality of photovoltaic panels 211 and a plurality of second power optimizers 212, each second power optimizer 212 is connected in series with a corresponding photovoltaic panel 211, and a plurality of second power optimizers 212 are connected in series.

[0064] In this way, the power optimizer solves the voltage mismatch problem of the photovoltaic panel 211 , which is beneficial to ensure the maximum output power of the carport photovoltaic assembly 21 .

[0065] Specifically, a photovoltaic panel 211 (Photovoltaic Panel), also known as a solar panel, is a device that directly converts light energy into electrical energy through the photoelectric effect or photochemical effect. It is usually composed of a number of solar cells connected in series and in parallel, and encapsulated in glass, plastic or other transparent materials, forming a structure similar to a rigid board.

[0066] The main materials of the photovoltaic panel 211 are monocrystalline silicon, polycrystalline silicon, amorphous silicon and thin film batteries, etc. When these materials are irradiated by sunlight, they absorb light energy and convert it into electrical energy.

[0067] In the embodiment of the present application, due to the influence of factors such as shadows, dust, and temperature, unbalanced currents and voltages may be generated between multiple photovoltaic panels 211, which will affect the efficiency and reliability of the entire photovoltaic system 100. The second power optimizer 212 can be dynamically adjusted according to factors such as light intensity, temperature, and shadows to ensure that each photovoltaic panel 211 generates stable current and voltage, thereby improving the efficiency and reliability of the photovoltaic system 100. At the same time, the second power optimizer 212 can track the maximum power point in real time under different lighting conditions by using the maximum power point tracking (MPPT) technology, thereby improving the power generation efficiency of the photovoltaic system 100. The MPPT controller is the core part of the second power optimizer 212. It uses the "scanning method" technology to continuously adjust the voltage and current in the circuit to find the best matching combination point to achieve maximum power generation.

[0068] Further, in the embodiment of the present application, the input and output of a single photovoltaic panel 211 are directly connected to the adjacent second power optimizer 212, and the output of a single second power optimizer 212 is connected to the input of the next second power optimizer 212, and the connections are made in sequence, thereby realizing the series connection of the photovoltaic panel 211 and the second power optimizer 212, and the series connection of multiple second power optimizers 212. The head and tail connection lines of the multiple second power optimizers 212 connected in series are the total output and total input of the carport photovoltaic assembly 21.

[0069] See also Figure 4In some embodiments, the photovoltaic system 100 also includes a grid-connected inverter module 30, which includes a connected DC / DC circuit 31 and a grid-connected inverter circuit 32, the DC / DC circuit 31 is electrically connected to the roof photovoltaic component 10 and the auxiliary photovoltaic component 20, and the grid-connected inverter circuit 32 is connected to the power grid 70.

[0070] In this way, the direct current generated by the rooftop photovoltaic assembly 10 and the auxiliary photovoltaic assembly 20 can be converted into alternating current and finally output to the power grid 70, thereby generating some income for the user.

[0071] Specifically, the DC / DC circuit 31, also known as a DC-DC power supply circuit or a DC-DC converter, is a power electronic circuit whose main function is to convert DC power from one voltage level to another voltage level. The DC / DC circuit 31 generally uses a pulse width modulation (PWM) method to achieve a DC voltage boost, buck, and polarity conversion output.

[0072] The grid-connected inverter circuit 32 is a special inverter circuit that can convert the direct current generated by a direct current power source (such as a solar photovoltaic panel 211, a battery, etc.) into an alternating current with the same frequency and phase as the voltage of the power grid 70, and connect it to the power grid 70 to realize the function of transmitting electric energy to the power grid 70. The working principle of the grid-connected inverter circuit 32 is as follows: First, the DC-AC converter converts the input direct current into high-frequency alternating current. Then, the filter filters the high-frequency alternating current to obtain smooth alternating current. Then, the transformer matches the filtered alternating current with the power grid 70 to realize voltage conversion and isolation. Finally, the grid-connected controller monitors the voltage, frequency and other parameters of the power grid 70, and adjusts the output of the inverter according to these parameters to ensure that the alternating current output by the inverter runs synchronously with the power grid 70.

[0073] In the embodiment of the present application, the total output end and the total input end of the rooftop photovoltaic assembly 10 are connected to the DC / DC circuit 31 of the grid-connected inverter module 30, which is used to convert the input DC power to match the input end of the subsequent grid-connected inverter circuit 32. The DC power after DC conversion is sent to the grid-connected inverter circuit 32 to be inverted into AC power, and the inverted AC power is directly connected to the power grid 70.

[0074] Similarly, the total output end and the total input end of the carport photovoltaic assembly 21 are connected to the DC / DC circuit 31 of the grid-connected inverter module 30, which is used to convert the input DC power to match the input end of the subsequent grid-connected inverter circuit 32. The DC power after DC conversion is sent to the grid-connected inverter circuit 32 to be inverted into AC power, and the inverted AC power is directly connected to the power grid 70.

[0075] In some embodiments, the photovoltaic system 100 also includes an intelligent control module 40 and an energy storage module 50. The intelligent control module 40 includes a control unit 41 and an energy storage charging unit 42. The control unit 41 is respectively connected to the DC / DC circuit 31, and the energy storage charging unit 42 is connected to the control unit 41. The energy storage charging unit 42 is connected to the energy storage module 50. The control unit 41 is configured as follows: when the energy storage module 50 is fully charged or reaches a predetermined threshold, the grid-connected inverter circuit 32 is connected to the power grid 70; when the power grid 70 is powered off, the grid-connected inverter circuit 32 is disconnected from the power grid 70.

[0076] In this way, the photovoltaic system 100 can better adapt to the electricity demand in different situations.

[0077] Specifically, the control unit 41 is a core component of the photovoltaic system 100. The control unit 41 generally includes high-performance computing devices such as microprocessors and digital signal processors, as well as corresponding control algorithms and logic circuits. These devices and algorithms work together to achieve functions such as real-time monitoring, power regulation, communication management, and safety protection of the photovoltaic power station. The control unit 41 uses high-performance computing devices and advanced control algorithms to enable the control unit 41 to achieve intelligent management of the photovoltaic power station and improve the operating efficiency and safety of the photovoltaic power station.

[0078] The energy storage charging unit 42 is a unit integrating the functions of charging, energy storage, and discharging. It uses the charging controller to charge and discharge the energy storage module 50 with the electric energy generated by the roof photovoltaic assembly 10 and the auxiliary photovoltaic assembly 20, and realizes the conversion and output of electric energy through the inverter. The energy storage charging unit 42 plays an important role in the photovoltaic system 100. It can improve the self-sufficiency and stability of the photovoltaic system 100 and reduce the dependence on traditional energy.

[0079] In the embodiment of the present application, the control unit 41 can intelligently switch between the off-grid transmission mode and the grid-connected transmission mode. When it is detected that the energy storage module 50 is fully charged or charged to a predetermined threshold, it intelligently switches to the grid-connected transmission mode and transmits excess electric energy to the grid 70; when it is detected that the grid 70 is powered off, the connection end of the grid 70 is in a fault state, and forced power supply may cause damage to the inverter of the grid-connected inverter circuit 32. The control unit 41 will activate the island protection mechanism and intelligently switch the photovoltaic system 100 to the off-grid transmission mode, and output the maximum output power of the DC / DC circuit 31 to the energy storage module 50 through the energy storage charging unit 42.

[0080] In some embodiments, the intelligent control module 40 further includes a communication module 43 , which is electrically connected to the control unit 41 , and is used to transmit parameters of the photovoltaic system 100 to a remote terminal.

[0081] In this way, data collection and monitoring of the photovoltaic system 100 can be achieved.

[0082] Specifically, the communication module 43 is a module specifically used for information transmission between various parts of the photovoltaic system 100. It can connect various components in the photovoltaic system 100 to form a complete communication network to ensure information exchange within the system and between the system and external monitoring and management systems.

[0083] In the embodiment of the present application, the communication module 43 can collect and monitor data. The real-time voltage, current, power and DC power of each photovoltaic tile 11 connected to the first power optimizer 12 or the photovoltaic panel 211 connected to the second power optimizer 212 are transmitted to the communication unit via the control unit 41, and the communication unit can transmit to the remote terminal via WIFI and 4G / 5G signals. In addition, mobile phones and other smart devices can directly control the switching of the power supply mode of the entire home energy storage system through the communication module 43.

[0084] See also Figure 4 In some embodiments, the photovoltaic system 100 also includes a load 60, which is connected to the control unit 41. The control unit 41 is configured as follows: when the light intensity is less than a preset value, the control unit 41 is connected to the power grid 70 so that the power grid 70 can supply power to the load 60.

[0085] In this way, when the weather is bad, the grid 70 can be connected to avoid the inability to guarantee electricity demand.

[0086] Specifically, the load 60 of the photovoltaic system 100 refers to a device or system that obtains electrical energy from the photovoltaic system 100 for use. During the power generation process of the photovoltaic system 100, light energy is converted into electrical energy by the roof photovoltaic components 10 and the auxiliary photovoltaic components 20, and the electrical energy is converted into AC or DC, and then used by the appropriate load 60. The load 60 can be any device or system that requires electrical energy, and they play the role of consuming electrical energy in the photovoltaic system 100.

[0087] In the embodiment of the present application, since the photovoltaic system 100 is a household photovoltaic system 100, the load 60 includes but is not limited to household appliances, such as televisions, refrigerators, washing machines, air conditioners, lighting systems, etc. These devices directly obtain electrical energy from the photovoltaic system 100 or the energy storage module 50 connected thereto.

[0088] When there is continuous rainy weather and the power generation of the rooftop photovoltaic components 10 and the auxiliary photovoltaic components 20 of the photovoltaic system 100 is insufficient to meet the power demand of all loads 60, the control unit 41 can be intelligently or manually controlled to directly transmit power from the grid 70 to the energy storage module 50 or the load 60.

[0089] In some embodiments, the photovoltaic system 100 also includes a buck-boost circuit module 80, which includes a DC / DC buck circuit 81, a DC / AC boost circuit 82 and an LC filter 83. The DC / DC buck circuit 81 and the DC / AC boost circuit 82 are respectively connected to the intelligent control module 40, and the load 60 includes a DC load 61 and an AC load 62. The DC / DC buck circuit 81 is connected to the DC load 61, and the DC / AC boost circuit 82 is connected to the AC load 62 through the LC filter 83.

[0090] In this way, the photovoltaic system 100 can have more types of loads 60 to meet different power demands.

[0091] Specifically, the DC / DC buck circuit 81 is an electronic circuit for converting a direct current (DC) voltage level to another lower direct current voltage level. The DC / DC buck circuit 81 mainly uses inductor and capacitor components to achieve the conversion of input voltage to output voltage through the switch control of the switch tube. The on and off time of the switch tube (such as MOSFET) is precisely controlled to adjust the output voltage. When the switch tube is turned on, the inductor stores energy; when the switch tube is turned off, the inductor releases the stored energy to maintain the stability of the output voltage.

[0092] The DC / AC boost circuit 82, also known as an inverter circuit or an inverter, is an electronic circuit whose main function is to convert a direct current (DC) power supply into an alternating current (AC) power supply and, in some cases, simultaneously increase the voltage. The working principle of the DC / AC boost circuit 82 is based on the fast on-off control of semiconductor switching devices (such as MOSFET, IGBT, etc.). These switching devices are switched on and off at a specific frequency (usually between tens of kHz and hundreds of kHz), thereby generating a high-frequency AC voltage at the output end. This high-frequency AC voltage is then smoothed into an AC voltage close to a sine wave through a filter circuit (such as an inductor, a capacitor, etc.).

[0093] LC filter 83, also known as inductor-capacitor filter, is an electronic filter composed of inductor (L) and capacitor (C) components. This filter is widely used in circuit design, mainly used to filter out unwanted frequency components and only allow signals within a specific frequency range to pass. The working principle of LC filter 83 is based on the impedance characteristics of inductor and capacitor to alternating current, that is, the impedance of inductor to low-frequency signals is small and the impedance to high-frequency signals is large, while the capacitor is just the opposite.

[0094] In the embodiment of the present application, the LC filter 83 is used to filter out high-frequency noise in the AC signal output by the DC / AC boost circuit 82 to meet the power quality requirements of the power grid 70 .

[0095] In the embodiment of the present application, the DC / DC step-down circuit 81 can step down the DC voltage originally used to transmit power to the energy storage module 50 to a DC working voltage suitable for the DC load 61; the DC / AC step-up circuit 82 converts the DC voltage originally used to transmit power to the energy storage module 50 to a 220V AC voltage, and transmits the AC power to the AC load 62 after filtering through the LC filter 83. The load 60 includes a DC load 61 and an AC load 62, wherein the DC load 61 includes a mobile phone, an IPAD, a smart watch, etc., and the AC load 62 includes a tram, an induction cooker, an air conditioner, etc.

[0096] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0097] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, unless otherwise clearly and specifically defined.

[0098] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A photovoltaic system, characterized in that: include: A rooftop photovoltaic assembly, wherein the rooftop photovoltaic assembly comprises a plurality of photovoltaic tiles, and the photovoltaic tiles are wavy; Auxiliary photovoltaic components, the auxiliary photovoltaic components include at least one of carport photovoltaic components, balcony photovoltaic components, awning photovoltaic components and fence photovoltaic components, and the auxiliary photovoltaic components are connected in parallel with the roof photovoltaic components.

2. The photovoltaic system according to claim 1, characterized in that: The photovoltaic system further comprises a photovoltaic DC combiner box, and the roof photovoltaic assembly and the auxiliary photovoltaic assembly are respectively connected to the photovoltaic DC combiner box.

3. The photovoltaic system according to claim 2, characterized in that: The rooftop photovoltaic assembly further includes a plurality of first power optimizers, each of which is connected in series with a corresponding photovoltaic tile, and the plurality of first power optimizers are connected in series.

4. The photovoltaic system according to claim 3, characterized in that: The input voltage of the first power optimizer is 4-7V.

5. The photovoltaic system according to claim 1, characterized in that: The auxiliary photovoltaic components include the carport photovoltaic components, the balcony photovoltaic components, the awning photovoltaic components and the fence photovoltaic components.

6. The photovoltaic system according to claim 5, characterized in that: The carport photovoltaic assembly includes a plurality of photovoltaic panels and a plurality of second power optimizers, each of the second power optimizers is connected in series with the corresponding photovoltaic panel, and the plurality of second power optimizers are connected in series.

7. The photovoltaic system according to claim 1, characterized in that: The photovoltaic system also includes a grid-connected inverter module, which includes a connected DC / DC circuit and a grid-connected inverter circuit. The DC / DC circuit is electrically connected to the roof photovoltaic assembly and the auxiliary photovoltaic assembly, and the grid-connected inverter circuit is connected to the power grid.

8. The photovoltaic system according to claim 7, characterized in that: The photovoltaic system also includes an intelligent control module and an energy storage module. The intelligent control module includes a control unit and an energy storage charging unit. The control unit is respectively connected to the DC / DC circuit, the energy storage charging unit is connected to the control unit, and the energy storage charging unit is connected to the energy storage module. The control unit is configured as follows: when the energy storage module is fully charged or reaches a predetermined threshold, the grid-connected inverter circuit is connected to the grid; when the grid is powered off, the grid-connected inverter circuit is disconnected from the grid.

9. The photovoltaic system according to claim 8, characterized in that: The intelligent control module further comprises a communication module, which is electrically connected to the control unit and is used to transmit the parameters of the photovoltaic system to a remote terminal.

10. The photovoltaic system according to claim 8, characterized in that: The photovoltaic system also includes a load, which is connected to the control unit. The control unit is configured to communicate with the power grid when the light intensity is less than a preset value, so that the power grid can supply power to the load.

11. The photovoltaic system according to claim 10, characterized in that: The photovoltaic system also includes a buck-boost circuit module, which includes a DC / DC buck circuit, a DC / AC boost circuit and an LC filter. The DC / DC buck circuit and the DC / AC boost circuit are respectively connected to the intelligent control module. The load includes a DC load and an AC load. The DC / DC buck circuit is connected to the DC load, and the DC / AC boost circuit is connected to the AC load through the LC filter.

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