Photovoltaic power generation system capable of adjusting power

Abstract

The utility model discloses a photovoltaic power generation system capable of adjusting power, the power generation system comprises a photovoltaic power generation panel and a grid-connected energy storage box, the photovoltaic power generation panel is fixed on a pedestal through a support, the pedestal is also provided with a slide rail and a shielding part, the shielding part is in a U shape with a downward opening, and the grid-connected energy storage box is fixed on the slide rail. The two ends of an opening of the [-shaped shielding part are in sliding connection with the sliding rails, the opening of the [-shaped shielding part and the base form a shielding space, the grid-connected energy storage box is arranged in the shielding space, and the output end of the photovoltaic power generation panel is electrically connected with an electric input interface of the grid-connected energy storage box.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation, in particular to a photovoltaic power generation system capable of power regulation. Background Art

[0002] Photovoltaic is short for solar photovoltaic power generation system, which is a new type of power generation system that uses the photovoltaic effect of solar cell semiconductor materials to directly convert solar radiation energy into electrical energy. It has two operation modes: independent operation and grid-connected operation. At the same time, the solar photovoltaic power generation system can be classified into two types: one is centralized, such as large-scale northwest ground photovoltaic power generation systems, and the other is distributed (with >6MW as the boundary). In current distributed photovoltaic power generation systems, a storage battery is usually connected to supply supplementary power to the load, and this connection method often makes it difficult to accurately regulate the output power of the photovoltaic panel. Content of the Utility Model

[0003] In view of the above-mentioned prior art, the utility model aims to provide a photovoltaic power generation system capable of power regulation, mainly solving the technical problems existing in the above background art.

[0004] To achieve the above object, the technical solution of the embodiment of the utility model is realized as follows: A photovoltaic power generation system capable of power regulation, the power generation system includes a photovoltaic panel and a grid-connected energy storage box. The photovoltaic panel is fixed on a base through a bracket. A slide rail and a shielding part are also provided on the base. The shielding part is in a "C" shape with an opening downward. The two ends of the opening of the "C" - shaped shielding part are slidably connected to the slide rail, and together with the base, the opening forms a shielding space. The grid-connected energy storage box is arranged in the shielding space, and the output end of the photovoltaic panel is electrically connected to the electrical input interface of the grid-connected energy storage box.

[0005] Optionally, the shielding part is arranged below the photovoltaic panel.

[0006] Optionally, the heights of the two brackets at the front end of the base are less than the heights of the two brackets at the rear end.

[0007] Optionally, chutes are provided at both ends of the opening of the "C" - shaped shielding part, and the slide rail is embedded in the chutes and is slidably connected to the chutes.

[0008] Optionally, the grid-connected energy storage box includes a box body, a maximum power point tracking device and a storage battery arranged inside the box body. The box body is placed in the shielding space. An electrical input interface is provided on the side wall of the box body, and the electrical input interface is electrically connected to the maximum power point tracking device, and the maximum power point tracking device is electrically connected to the storage battery.

[0009] Optionally, the power point tracking device includes a boost circuit, a PWM generator, and an MPPT controller. The electrical input interface is electrically connected to the boost circuit. The output end of the boost circuit is electrically connected to the storage battery. The boost circuit is signal-connected to the PWM generator, and the PWM generator is signal-connected to the MPPT controller.

[0010] Optionally, a voltage acquisition circuit and a current acquisition circuit are further connected to the output end of the photovoltaic panel. The voltage acquisition circuit and the current acquisition circuit are connected to the MPPT controller.

[0011] The beneficial effects of the present utility model are as follows: By setting up the grid-connected energy storage box and applying the MPPT technology to intelligently adjust the output power of the photovoltaic panel, not only can energy be saved, but also the energy utilization rate can be improved, and the service life of the equipment can be extended. The "匸"-shaped shielding part and the base together construct a shielding space, and the grid-connected energy storage box is placed through the shielding space to protect the grid-connected energy storage box. When maintenance is required, the shielding part can be slid along the slide rail, so that the grid-connected energy storage box is exposed for convenient maintenance. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the photovoltaic power generation system in the embodiment of the present application;

[0013] Figure 2 is a schematic structural diagram of the power point tracking device in the embodiment of the present application.

[0014] Description of the Reference Numerals in the Drawings:

[0015] 1. Photovoltaic panel; 2. Grid-connected energy storage box; 3. Bracket; 4. Base; 5. Slide rail; 6. Shielding part; 7. Shielding space; 8. Boost circuit; 9. PWM generator; 10. MPPT controller; 11. Storage battery; 12. Voltage acquisition circuit; 13. Current acquisition circuit; 14. Electrical input interface. Detailed Embodiments

[0016] The technical solution of the present utility model will be further described in detail below with reference to the drawings in the specification and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model. In the following description, the expression "some embodiments" is used, which describes a subset of all possible embodiments. However, it should be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

[0017] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0018] It should be understood that the utility model can be implemented in different forms and should not be interpreted as being limited to the embodiments presented here. On the contrary, providing these embodiments will make the disclosure thorough and complete, and the scope of the utility model will be fully conveyed to those skilled in the art. And the purpose of the terms used herein is only to describe specific embodiments and is not intended to be a limitation of the utility model. When used here, the singular forms of "one", "one" and "said / the" are also intended to include plural forms, unless the context clearly indicates another way. It should also be understood that the terms "compose" and / or "include" when used in this specification determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used here, the term "and / or" includes any and all combinations of the relevant listed items.

[0019] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0020] In order to thoroughly understand the present invention, a detailed structure will be presented in the following description to illustrate the technical solution proposed by the present invention. The optional embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0021] Please refer to the attached Figure 1 to Figure 2, this application provides a photovoltaic power generation system capable of power regulation. The power generation system includes a photovoltaic panel 1 and a grid-connected energy storage box 2. The photovoltaic panel 1 is fixed on a base 4 through a bracket 3. A slide rail 5 and a shielding part 6 are also provided on the base 4. The shielding part 6 is in an inverted "C" shape with an opening downward. The two ends of the opening of the inverted "C" shaped shielding part 6 are slidably connected to the slide rail 5, and its opening together with the base 4 forms a shielding space 7. The grid-connected energy storage box 2 is provided in the shielding space 7. The output end of the photovoltaic panel 1 is electrically connected to the electrical input interface 14 of the grid-connected energy storage box 2.

[0022] A photovoltaic power generation system capable of power regulation disclosed in this application constructs a shielding space 7 through the inverted "C" shaped shielding part 6 and the base 4, and places the grid-connected energy storage box 2 through the shielding space 7 to achieve the protection of the grid-connected energy storage box 2. When maintenance is required, the shielding part 6 can be slid along the slide rail 5, so that the grid-connected energy storage box 2 is exposed for convenient maintenance. By setting the grid-connected energy storage box 2 and using the MPPT technology to realize the intelligent regulation of the output power of the photovoltaic panel 1, it can not only save energy, but also improve the energy utilization rate and extend the service life of the equipment.

[0023] Specifically, the shielding part 6 is arranged below the photovoltaic panel 1.

[0024] Specifically, the heights of the two brackets 3 at the front end of the base 4 are less than the heights of the two brackets 3 at the rear end, so that the photovoltaic panel 1 can be placed obliquely on the brackets 3.

[0025] Specifically, chutes are provided at both ends of the opening of the inverted "C" shaped shielding part 6, and the slide rail 5 is embedded in the chutes and slidably connected to the chutes. Through the mutual cooperation of the chutes and the slide rail 5, the shielding part 6 can move along the slide rail 5.

[0026] Specifically, the grid-connected energy storage box 2 includes a box body, a power point tracking device and a storage battery 11 arranged inside the box body. The box body is placed in the shielding space 7. An electrical input interface 14 is provided on the side wall of the box body. The electrical input interface 14 is electrically connected to the power point tracking device, and the power point tracking device is electrically connected to the storage battery 11. The electric energy output by the photovoltaic panel 1 is connected to the power point tracking device through the electrical input interface 14. The power point tracking device realizes the intelligent output regulation of the power and finally outputs it to the storage battery 11 for storage. Its power point tracking device uses the MPPT technology to realize the intelligent regulation of the output power of the photovoltaic panel 1, which can not only save energy, but also avoid the problem that the storage battery 11 cannot be charged after over-discharging, improve the energy utilization rate and extend the service life of the equipment.

[0027] Specifically, the power point tracking device includes a boost circuit 8, a PWM generator 9, and an MPPT controller 10. The electrical input interface 14 is electrically connected to the boost circuit 8, the output end of the boost circuit 8 is electrically connected to the battery 11, the boost circuit 8 is signal-connected to the PWM generator 9, and the PWM generator 9 is signal-connected to the MPPT controller 10.

[0028] During operation, the electric energy output by the photovoltaic panel 1 is connected to the boost circuit 8 through the electrical input interface 14. The MPPT controller 10 calculates the conductance increment and instantaneous conductance of the photovoltaic panel 1, and compares the conductance increment and the instantaneous conductance to determine whether the maximum power point of the photovoltaic panel 1 changes. When the conductance increment is equal to the negative value of the instantaneous conductance, the photovoltaic panel 1 works at the maximum power point. When the sum of the conductance increment and the instantaneous conductance is greater than zero or less than zero, the photovoltaic panel 1 needs to be adjusted to track the maximum power point. During adjustment, the MPPT controller 10 generates an adjustment signal according to the deviation, and transmits the adjustment signal to the PWM generator 9. The PWM generator 9 generates a pulse drive signal to drive the boost circuit 8, change the working voltage of the photovoltaic panel 1, eliminate the deviation, and keep the photovoltaic panel 1 near the maximum power point or change according to a predetermined rule, so as to achieve the effect of maximum power point tracking.

[0029] In one embodiment, the output end of the photovoltaic power generation panel 1 is also connected to a voltage collection circuit 12 and a current collection circuit 13, and the voltage collection circuit 12 and the current collection circuit 13 are connected to the MPPT controller 10. The output current and the output voltage of the photovoltaic power generation panel 1 are collected through the voltage collection circuit 12 and the current collection circuit 13, and the output current and the output voltage are sent to the MPPT controller 10. The MPPT controller 10 calculates the conductance increment and the instantaneous conductance of the photovoltaic power generation panel 1 according to the output current and the output voltage.

[0030] It should be noted that the MPPT controller 10 calculates the conductance increment and instantaneous conductance of the photovoltaic panel 1 according to the output current and the output voltage, which is an inherent function of the electronic component. The specific principle is common knowledge to those skilled in the art and will not be elaborated in detail in this embodiment.

[0031] It should be noted that the MPPT controller 10, voltage acquisition circuit 12, current acquisition circuit 13, PWM generator 9, boost circuit 8 and other components used in this application are all existing electronic components in the field. Those skilled in the art can understand the circuit structure of electronic components such as the MPPT controller 10, voltage acquisition circuit 12, current acquisition circuit 13, PWM generator 9, boost circuit 8 and the circuit connection structure between each other based on the existing public technical knowledge and technical information. The embodiments of this application will not be further elaborated on this, and those skilled in the art can freely choose the corresponding model according to their needs. This embodiment is not specifically limited here.

[0032] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. The protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A photovoltaic power generation system capable of power regulation, characterized in that: The power generation system includes a photovoltaic panel and a grid-connected energy storage box. The photovoltaic panel is fixed on a base through a bracket. The base is also provided with a slide rail and a shielding part. The shielding part is in an inverted "C" shape with an opening facing downwards. The two ends of the opening of the inverted "C" - shaped shielding part are slidably connected to the slide rail, and together with the base, an shielding space is formed at its opening. The grid-connected energy storage box is arranged in the shielding space. The output end of the photovoltaic panel is electrically connected to the electrical input interface of the grid-connected energy storage box.

2. A photovoltaic power generation system capable of power regulation according to claim 1, characterized in that: The shielding part is arranged below the photovoltaic panel.

3. A photovoltaic power generation system capable of power regulation according to claim 1, characterized in that: The heights of the two brackets at the front end of the base are less than the heights of the two brackets at the rear end.

4. A photovoltaic power generation system capable of power regulation according to claim 1, characterized in that: Chute grooves are provided at both ends of the opening of the inverted "C" - shaped shielding part, and the slide rail is embedded in the chute grooves and is slidably connected to the chute grooves.

5. A photovoltaic power generation system capable of power regulation according to claim 1, characterized in that: The grid-connected energy storage box includes a box body, a power point tracking device and a storage battery arranged inside the box body. The box body is placed in the shielding space. An electrical input interface is provided on the side wall of the box body. The electrical input interface is electrically connected to the power point tracking device, and the power point tracking device is electrically connected to the storage battery.

6. A photovoltaic power generation system capable of power regulation according to claim 5, characterized in that: The power point tracking device includes a boost boost circuit, a PWM generator and an MPPT controller. The electrical input interface is electrically connected to the boost boost circuit. The output end of the boost boost circuit is electrically connected to the storage battery. The boost boost circuit is signal - connected to the PWM generator, and the PWM generator is signal - connected to the MPPT controller.

7. A photovoltaic power generation system capable of power regulation according to claim 6, characterized in that: The output end of the photovoltaic panel is also connected with a voltage acquisition circuit and a current acquisition circuit. The voltage acquisition circuit and the current acquisition circuit are connected to the MPPT controller.

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