Energy harvesting unit, power generation system and scheduling method thereof

Abstract

An energy collection unit, a power generation system and a scheduling method thereof, the energy collection unit comprising: a support, the support comprising a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft being fixed at a preset angle; the energy collecting structure comprises a photovoltaic panel and a heliostat, and the photovoltaic panel and the heliostat are located on the two sides of the first rotating shaft in the direction perpendicular to the axial direction of the first rotating shaft. The energy collection structure comprises a photovoltaic panel and a heliostat, and the energy collection unit can enter a photovoltaic mode or a photo-thermal mode according to needs so as to improve the utilization effect of a power generation system on solar energy.

Description

Technical Field

[0001] The present invention relates to the field of solar power generation, and in particular to an energy collection unit and a power generation system and a scheduling method thereof. Background Art

[0002] Solar power generation can include photovoltaic power generation and solar thermal power generation. Photovoltaic power generation refers to a power generation method that uses the photovoltaic effect of photovoltaic panels to directly convert the energy of sunlight into electrical energy; solar thermal power generation uses heliostats to reflect sunlight to heat molten salt to store thermal energy, and then uses the stored thermal energy to generate electricity.

[0003] Photovoltaic power generation directly converts the energy of sunlight and has the advantage of high energy conversion rate, but it also has the problem that the luminous power is greatly affected by light changes and the luminous power stability is poor. In comparison, solar thermal power generation can realize thermal energy storage, and the power generation is not limited by light. It is a green power generation technology with broad prospects.

[0004] However, the existing new energy power generation system only has an energy collection unit with a single power generation method, which makes it difficult to achieve the best solar energy utilization effect. Summary of the invention

[0005] The problem solved by the present invention is how to further improve the solar energy utilization effect of the new energy power generation system.

[0006] In order to solve the above problems, the present invention provides an energy collection unit, comprising:

[0007] A bracket, the bracket comprising a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft are fixed at a preset angle; an energy collection structure, the energy collection structure comprising: a photovoltaic panel and a heliostat, along the axial direction perpendicular to the first rotating shaft, the photovoltaic panel and the heliostat are located on both sides of the first rotating shaft.

[0008] Optionally, the first rotating axis and the second rotating axis are perpendicular to each other.

[0009] Optionally, the collection surface of the photovoltaic panel and the reflection surface of the heliostat are arranged opposite to each other.

[0010] Optionally, the first rotating shaft has a first fixed surface and a second fixed surface that are parallel to each other; the photovoltaic panel is fixed to the first fixed surface; and the heliostat is fixed to the second fixed surface.

[0011] Optionally, the collection surface of the photovoltaic panel and the reflection surface of the heliostat are parallel to each other.

[0012] Optionally, it also includes: a connecting member, which is mounted on the periphery of the first rotating shaft and is fixedly connected to the second rotating shaft; along the axial direction of the first rotating shaft, the portion of the first rotating shaft located on one side of the connecting member is the first fixed portion of the first rotating shaft, and the portion of the first rotating shaft located on the other side of the connecting member is the second fixed portion of the first rotating shaft; the energy collection unit has two energy collection structures, and the two energy collection structures are respectively connected to the first fixed portion and the second fixed portion of the first rotating shaft.

[0013] Optionally, it also includes: a first motor, which is suitable for driving the energy collection structure to move around the first rotation axis; and a second motor, which is suitable for driving the first rotation axis to move around the second rotation axis.

[0014] Optionally, it also includes: a controller, the controller is connected to both the first motor and the second motor, and a photovoltaic algorithm and a photothermal algorithm are set in the controller.

[0015] Correspondingly, the present invention further provides a power generation system, comprising: a heat collection tower; a plurality of energy collection units, wherein the plurality of energy collection units are distributed around the heat collection tower, and the energy collection units are the energy collection units of the present invention.

[0016] Optionally, it also includes: a control module, which is configured to control the energy collection unit to enter a photovoltaic mode, wherein, when entering the photovoltaic mode, the photovoltaic panel of the energy collection unit is at a photovoltaic angle to the sun to obtain maximum photovoltaic efficiency; the control module is also configured to control the energy collection unit to enter a photothermal mode, wherein, when entering the photothermal mode, the heliostat of the energy collection unit is at a photothermal angle to the sun to reflect sunlight to a thermal collection tower.

[0017] Optionally, the control module includes: a screening unit, the screening unit is configured to determine the energy collection unit entering the photovoltaic mode; a scheduling unit, the scheduling unit is configured to generate a scheduling signal; the control module controls the energy collection unit to enter the photovoltaic mode according to the scheduling signal.

[0018] Optionally, the screening unit includes: a sequencer, which is configured to determine the photothermal mode sequence of each energy collection unit based on the photothermal efficiency of each energy collection unit; a photovoltaic determiner, which is configured to determine the energy collection unit entering the photovoltaic mode based on a preset value of photovoltaic power generation and according to the photothermal mode sequence; a photothermal determiner, which is configured to determine the energy collection unit entering the photothermal mode based on the energy collection unit determined to enter the photovoltaic mode; and the scheduling unit generates the scheduling signal based on the energy collection unit entering the photothermal mode and the energy collection unit entering the photothermal mode.

[0019] Optionally, the control module further includes: a photovoltaic power unit, wherein the photovoltaic power unit is configured to determine a photovoltaic power generation preset value based on at least one of a predicted power generation average value, a historical power generation average value and a grid demand value.

[0020] Optionally, the control module further includes: a monitoring unit configured to monitor the photovoltaic power generation power of the system; and the screening unit is configured to determine the energy collection unit to enter the photovoltaic mode based on the result of the monitoring unit monitoring the photovoltaic power generation power of the system.

[0021] Optionally, when the monitoring unit determines that the photovoltaic power generation power of the system is greater than the photovoltaic power generation preset value, the screening unit determines that a part of the energy collection units entering the photovoltaic mode are switched to the photothermal mode; when the monitoring unit determines that the photovoltaic power generation power of the system is less than the photovoltaic power generation preset value, the screening unit determines that a part of the energy collection units entering the photothermal mode are switched to the photovoltaic mode.

[0022] In addition, the present invention also provides a scheduling method for a power generation system, the power generation system comprising: a heat collection tower; a plurality of energy collection units, the plurality of energy collection units being distributed around the heat collection tower, the energy collection units being the energy collection units of the present invention; the scheduling method comprising: controlling the energy collection unit to enter a photovoltaic mode, wherein, when entering the photovoltaic mode, the photovoltaic panel of the energy collection unit is at a photovoltaic angle to the sun to obtain maximum photovoltaic efficiency; controlling the energy collection unit to enter a photothermal mode, wherein, when entering the photothermal mode, the heliostat of the energy collection unit is at a photothermal angle to the sun to reflect sunlight to the heat collection tower.

[0023] Optionally, it also includes: determining an energy collection unit to enter a photovoltaic mode; generating a scheduling signal; in the step of controlling the energy collection unit to enter the photovoltaic mode, according to the scheduling signal, controlling the energy collection unit to enter the photovoltaic mode; controlling the energy collection unit to enter a solar thermal mode, according to the scheduling signal, controlling the energy collection unit to enter the solar thermal mode.

[0024] Optionally, the step of determining the energy collection unit entering the photovoltaic mode includes: determining the photothermal mode sequence of each energy collection unit based on the photothermal efficiency of each energy collection unit; determining the energy collection unit entering the photovoltaic mode according to the photothermal mode sequence based on the preset value of photovoltaic power generation; determining the energy collection unit entering the photothermal mode based on the energy collection unit determined to enter the photovoltaic mode; in the step of generating a scheduling signal, generating the scheduling signal according to the energy collection unit entering the photothermal mode and the energy collection unit entering the photothermal mode.

[0025] Optionally, it also includes: determining a photovoltaic power generation preset value based on at least one of a predicted power generation average value, a historical power generation average value and a grid demand value.

[0026] Optionally, the method further includes: monitoring the photovoltaic power generation of the system; and determining the energy collection unit to enter the photovoltaic mode, based on the result of monitoring the photovoltaic power generation of the system, determining the energy collection unit to enter the photovoltaic mode.

[0027] Optionally, when the photovoltaic power generation power of the system is greater than the photovoltaic power generation preset value, in the step of determining the energy collection units that enter the photovoltaic mode, a part of the energy collection units that enter the photovoltaic mode are switched to the solar thermal mode; when the photovoltaic power generation power of the system is less than the photovoltaic power generation preset value, in the step of determining the energy collection units that enter the photovoltaic mode, a part of the energy collection units that enter the solar thermal mode are switched to the photovoltaic mode.

[0028] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0029] In the technical solution of the present invention, the energy collection structure includes: a photovoltaic panel and a heliostat, and the photovoltaic panel and the heliostat are located on both sides of the first rotating shaft in the axial direction perpendicular to the first rotating shaft. The energy collection structure includes a photovoltaic panel and a heliostat, and the energy collection unit can enter a photovoltaic mode or a photothermal mode as needed to improve the utilization effect of solar energy by the power generation system.

[0030] In an optional solution of the present invention, the control module of the power generation system can determine the energy collection unit that enters the photovoltaic mode according to a preset photovoltaic power generation preset value, which can effectively ensure the stability of the system's photovoltaic power generation power, so that the system's photovoltaic power generation power matches the grid demand, so as to further improve the power generation system's utilization of solar energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the structure of an energy collection unit in some embodiments of the present invention;

[0032] Figure 2 is a schematic diagram of the structure of a bracket in some embodiments of the present invention;

[0033] Figure 3 is a schematic diagram of the structure of the energy collection unit entering the photothermal mode in some embodiments of the present invention;

[0034] Figure 4 is a schematic diagram of the structure of a power generation system in some embodiments of the present invention;

[0035] Figure 5 is a flow chart of a scheduling method for a power generation system in some embodiments of the present invention;

[0036] Figure 6is a flow chart of the step of determining an energy collection unit entering a photovoltaic mode in a scheduling method for a power generation system in some embodiments of the present invention;

[0037] Figure 7 is a functional block diagram of a control module in a power generation system in some embodiments of the present invention. DETAILED DESCRIPTION

[0038] As can be seen from the background art, the existing new energy power generation system only has an energy collection unit with a single power generation method, which makes it difficult to achieve the best solar energy utilization effect.

[0039] In order to solve the technical problem, the present invention provides an energy collection unit, comprising:

[0040] A bracket, the bracket comprising a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft are fixed at a preset angle; an energy collection structure, the energy collection structure comprising: a photovoltaic panel and a heliostat, along the axial direction perpendicular to the first rotating shaft, the photovoltaic panel and the heliostat are located on both sides of the first rotating shaft.

[0041] In the technical solution of the present invention, the energy collection structure includes a photovoltaic panel and a heliostat, and the energy collection unit can enter a photovoltaic mode or a photothermal mode as needed to improve the utilization effect of solar energy by the power generation system.

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0043] refer to Figure 1 , which shows a schematic diagram of the structure of the energy collection unit in some embodiments of the present invention. Figure 2 , showing a schematic structural diagram of a bracket in some embodiments of the present invention.

[0044] The energy collection unit comprises:

[0045] A bracket 110, wherein the bracket 110 includes a first rotating shaft 111 and a second rotating shaft 112, wherein the first rotating shaft 111 and the second rotating shaft 112 are fixed at a preset angle; an energy collection structure 120, wherein the energy collection structure 120 includes: a photovoltaic panel 121 and a heliostat 122, wherein the photovoltaic panel 121 and the heliostat 122 are located on both sides of the first rotating shaft 111 in a direction perpendicular to the axial direction of the first rotating shaft 111.

[0046] The technical solution of the energy collection unit is described in detail below with reference to the accompanying drawings.

[0047] The bracket 110 is used to provide mechanical support.

[0048] The first rotating shaft 111 and the second rotating shaft 112 fixed at a preset angle are used to enable the energy collection structure 120 to rotate in two dimensions in different directions, thereby achieving full-angle coverage of the energy collection structure 120 in terms of angles.

[0049] In some embodiments of the present invention, the first rotating shaft 111 has a first fixing surface 111c and a second fixing surface (not shown) parallel to each other. The first fixing surface 111c and the second fixing surface are both planes, and are used to fix the photovoltaic panel 121 and the heliostat 122 in the energy collection structure 120, respectively.

[0050] The first fixing surface 111c and the second fixing surface are parallel to each other and are arranged opposite to each other. Specifically, the first rotating shaft 111 is a prism, such as a quadrangular prism, a pentagonal prism, a hexagonal prism, an octagonal prism, etc., that is, in a plane perpendicular to the axial direction of the first rotating shaft 111, the cross-section of the first rotating shaft 111 is a polygon. The two surfaces of the prism are the first fixing surface 111c and the second fixing surface respectively.

[0051] In some embodiments of the present invention, the second rotating shaft 112 is a circular shaft, that is, the cross-section of the second rotating shaft 112 is circular or elliptical in a plane perpendicular to the axial direction of the second rotating shaft 112. In other embodiments of the present invention, the second rotating shaft may also be a prismatic shaft, that is, the cross-section of the second rotating shaft may also be polygonal in a plane perpendicular to the axial direction of the second rotating shaft.

[0052] In some embodiments of the present invention, the first rotating shaft 111 and the second rotating shaft 112 are perpendicular to each other. Specifically, the first rotating shaft 111 is parallel to the horizontal plane; the second rotating shaft 112 is perpendicular to the horizontal plane. The first rotating shaft 111 can realize the rotation of the energy collection structure 120 in a plane perpendicular to the horizontal plane; the second rotating shaft 112 can realize the rotation of the energy collection structure 120 in a plane parallel to the horizontal plane.

[0053] In some embodiments of the present invention, the energy collection unit further includes: a connecting member 130, the connecting member 130 is sleeved on the periphery of the first rotating shaft 111, and the connecting member 130 is fixedly connected to the second rotating shaft 112. The connecting member 130 is used to realize the fixed connection between the first rotating shaft 111 and the second rotating shaft 112.

[0054] In some embodiments, the connecting member 130 is sleeved on the middle position of the first rotating shaft 111 ; the first rotating shaft 111 passes through the connecting member 130 , and two ends of the first rotating shaft 111 along the axial direction extend from two sides of the connecting member 130 respectively.

[0055] like Figure 2As shown, along the axial direction of the first rotating shaft 111, the portion of the first rotating shaft 111 located on one side of the connecting member 130 is the first fixing portion 111a of the first rotating shaft 111, and the portion of the first rotating shaft 111 located on the other side of the connecting member 130 is the second fixing portion 111b of the first rotating shaft 111.

[0056] For example, the connecting member 130 is sleeved on the middle position of the first rotating shaft 111 along the axial direction, and the size of the first fixing portion 111a along the axial direction is equal to the size of the second fixing portion 111b along the axial direction.

[0057] It should be noted that if Figure 1 and Figure 2 In some embodiments shown, the bracket further includes: a base 140, and the base 140 is fixedly connected to the second rotating shaft 112. Specifically, the base 140 and the connecting member 130 are respectively fixed to two ends of the second rotating shaft 112 along the axial direction thereof.

[0058] Continue to refer Figure 1 The energy collection unit further includes an energy collection structure 120, and the energy collection structure 120 is used to collect solar energy to generate electricity.

[0059] The energy collection structure 120 includes a photovoltaic panel 121 and a heliostat 122 . The photovoltaic panel 121 and the heliostat 122 are located on both sides of the first rotating shaft 111 in a direction perpendicular to the axial direction of the first rotating shaft 111 .

[0060] The photovoltaic panel 121 receives photons based on the photoelectric effect and performs photoelectric conversion on the received photons to generate electrons to generate electrical energy. The heliostat 122 reflects light to the heat collecting tower in a preset direction to heat the molten salt on the top of the heat collecting tower, thereby converting light energy into thermal energy of the molten salt for storage, and then generating electricity.

[0061] In some embodiments of the present invention, the photovoltaic panel 121 and the heliostat 122 are arranged in parallel; the first rotating shaft 111 is located between the photovoltaic panel 121 and the heliostat 122 to fix the photovoltaic panel 121 and the heliostat 122 .

[0062] In some embodiments of the present invention, the collection surface of the photovoltaic panel 121 and the reflection surface of the heliostat 122 are arranged opposite to each other. The photovoltaic panel 121 has a collection surface, and the photovoltaic panel 121 receives the light incident on the collection surface; the heliostat 122 has a reflection surface, and the reflection surface of the heliostat 122 reflects the light to the heat collection tower.

[0063] In some embodiments of the present invention, the photovoltaic panel 121 is fixed to the first fixed surface of the first rotating shaft 111; the heliostat 122 is fixed to the second fixed surface of the first rotating shaft 111. As the first rotating shaft 111 rotates, the photovoltaic panel 121 and the heliostat 122 can both face the sun, so that the energy collection unit enters a photovoltaic mode or a photothermal mode.

[0064] It should be noted that when entering the photovoltaic mode, the photovoltaic panel of the energy collection unit is at a photovoltaic angle to the sun to obtain maximum photovoltaic efficiency; when entering the photothermal mode, the heliostat of the energy collection unit is at a photothermal angle to the sun to reflect sunlight to the collector tower.

[0065] In some embodiments of the present invention, the first rotating shaft 111 has a first fixing portion 111a and a second fixing portion 111b; the energy collection unit has two energy collection structures 120, and the two energy collection structures 120 are respectively connected to the first fixing portion 111a and the second fixing portion 111b of the first rotating shaft 111.

[0066] Specific as Figure 1 As shown, the two energy collection structures 120 are respectively located on both sides of the second rotating shaft 112 , and are respectively fixedly connected to the two fixing portions (the first fixing portion 111 a and the second fixing portion 111 b ) of the first rotating shaft 111 .

[0067] In some embodiments of the present invention, the energy collection unit also includes: a first motor (not shown in the figure), which is suitable for controlling the axial movement of the energy collection structure 120 around the first rotating axis 111; a second motor (not shown in the figure), which is suitable for controlling the axial movement of the energy collection structure 120 around the second rotating axis 112.

[0068] The first motor causes the first rotating shaft 111 to move axially around its axis, thereby causing the energy collection structure 120 fixedly connected to the first rotating shaft 111 to move axially around the first rotating shaft 111; the second motor causes the second rotating shaft 112 to move axially around its axis, thereby causing the first rotating shaft 111 to move axially around the second rotating shaft 112, thereby realizing the axial movement of the energy collection structure 120 around the second rotating shaft 112.

[0069] In some embodiments of the present invention, the energy collection unit further includes: a controller (not shown in the figure), the controller is connected to both the first motor and the second motor, and a photovoltaic algorithm and a photothermal algorithm are set in the controller.

[0070] like Figure 1As shown, when the energy collection unit enters the photovoltaic mode, the controller calls the photovoltaic algorithm to make the collection surface of the photovoltaic panel 121 face upward, so that the photovoltaic panel 121 is at a photovoltaic angle with the sun to obtain the maximum photovoltaic efficiency; Figure 3 As shown, when the energy collection unit enters the photothermal mode, the controller calls the photothermal algorithm to make the reflective surface of the heliostat 122 face upward, so that the reflective surface of the heliostat 122 forms a photothermal angle with the sun to reflect sunlight to the thermal tower.

[0071] The photovoltaic angle is the angle between the photovoltaic panel 121 and the sun when the maximum photovoltaic efficiency (ie, photovoltaic power generation efficiency) is obtained; the photovoltaic algorithm in the controller determines the photovoltaic angle according to the relative position between the energy collection unit and the sun.

[0072] In some embodiments, the photovoltaic algorithm in the controller includes: determining the position of the sun based on the date and time according to the astronomical calendar; determining the relative position between the sun and the energy collection unit based on the position of the energy collection unit and the position of the sun, and then determining the photovoltaic angle; the controller drives the first motor and the second motor based on the photovoltaic angle determined by the photovoltaic algorithm so that the photovoltaic panel is at the photovoltaic angle with the sun to obtain maximum photovoltaic efficiency.

[0073] It should be noted that when the solar altitude angle is small, the sunlight is incident in a direction with a large inclination, and the energy collection unit may be blocked by the surrounding energy collection units, thereby affecting its photovoltaic efficiency; in some embodiments, the photovoltaic algorithm in the controller can also determine the photovoltaic angle when the solar altitude angle is small, based on the relative position between the energy collection unit and the sun, combined with the relative position between different energy collection units, so as to minimize the obstruction between the photovoltaic panels and obtain the maximum photovoltaic efficiency.

[0074] In some embodiments, the photovoltaic algorithm includes an inverse tracking algorithm and a tracking algorithm; the photovoltaic algorithm in the controller also includes: judging whether to use a tracking algorithm or an inverse tracking algorithm according to the date and time; judging whether to use a tracking algorithm when the time is within a preset tracking time period; and judging whether to use a reverse tracking algorithm when the time is within a preset non-tracking time period. Among them, the preset tracking time period can be a time period with a larger solar altitude angle in a day, for example, between 10 am and 3 pm; the preset non-tracking time period can be a time period with a smaller solar altitude angle in a day, that is, the morning and evening time periods in a day, for example, between sunrise and 10 am, and from 3 pm to sunset. It should be noted that in some embodiments, in the step of judging whether to use a tracking algorithm or an inverse tracking algorithm, the judgment is made based on the date and time based on the astronomical calendar. In other embodiments, the controller can also directly judge whether to use a tracking algorithm or an inverse tracking algorithm based on the solar altitude angle. Specifically, when the solar altitude angle is greater than or equal to the preset tracking threshold, it is judged to use a tracking algorithm; when the solar altitude angle is less than the tracking threshold, it is judged to use an inverse tracking algorithm.

[0075] The photothermal angle is the angle between the reflective surface of the heliostat 122 and the sun when the sunlight is reflected from the reflective surface of the heliostat 122 to the heat collecting tower; the photothermal algorithm in the controller determines the photothermal angle according to the relative position between the energy collection unit and the sun.

[0076] In some embodiments, the photothermal algorithm in the controller includes: determining the position of the sun based on the date and time according to the astronomical calendar; determining the relative position between the sun and the energy collection unit based on the position of the energy collection unit and the position of the sun, and then determining the photothermal angle; based on the photothermal angle determined by the photothermal algorithm, the controller drives the first motor and the second motor so that the reflecting surface of the heliostat 122 is at the photothermal angle with the sun to reflect sunlight to the thermal collection tower.

[0077] Correspondingly, the present invention also provides a scheduling method for a power generation system.

[0078] refer to Figure 4 , showing a schematic structural diagram of a power generation system in some embodiments of the present invention.

[0079] The power generation system comprises: a heat collection tower 202; and a plurality of energy collection units 201, wherein the plurality of energy collection units 201 are distributed around the heat collection tower 202, and the energy collection units 201 are energy collection units of the present invention.

[0080] The heat collecting tower 202 may also be referred to as a molten salt tower. The top 203 of the heat collecting tower 202 is provided with molten salt for heating and storing thermal energy. The plurality of energy collection units 201 are distributed on the ground around the heat collecting tower 202 in a preset arrangement.

[0081] Specifically, Figure 4 As shown, the plurality of energy collection units 201 are distributed in concentric circles with the heat collection tower 202 as the center. In other embodiments of the present invention, the plurality of energy collection units may also be distributed in concentric directions with the heat collection tower as the geometric center.

[0082] Combined with reference Figure 5 , showing a flow chart of a scheduling method for a power generation system in some embodiments of the present invention.

[0083] The scheduling method includes: step S510, controlling the energy collection unit to enter a photovoltaic mode, wherein, when entering the photovoltaic mode, the photovoltaic panel of the energy collection unit is at a photovoltaic angle with the sun to obtain maximum photovoltaic efficiency; step S520, controlling the energy collection unit to enter a photothermal mode, wherein, when entering the photothermal mode, the heliostat 122 of the energy collection unit is at a photothermal angle with the sun to reflect sunlight to a thermal collection tower.

[0084] The photovoltaic panel of the energy harvesting unit in photovoltaic mode is facing upwards (such as Figure 1 As shown, the photovoltaic panel receives sunlight for photovoltaic power generation; the heliostat of the energy collection unit entering the photothermal mode faces upward (as shown Figure 3 As shown), the heliostats reflect light to the collector tower.

[0085] The scheduling method uniformly allocates the power generation system so that an appropriate number of energy collection units enter the photovoltaic mode, thereby making the system photovoltaic power generation power of the power generation system appropriate and compatible with the power grid; it can also make an appropriate number of energy collection units enter the photothermal mode, which can overcome the adverse effects of high temperature on the heating efficiency of photovoltaic panels, realize the storage of solar energy, and improve the utilization efficiency of solar energy by the power generation system.

[0086] In some embodiments of the present invention, Figure 5 As shown, the scheduling method also includes: step S530, determining the energy collection unit to enter the photovoltaic mode; step S540, generating a scheduling signal; step S510, in the step of controlling the energy collection unit to enter the photovoltaic mode, controlling the energy collection unit to enter the photovoltaic mode according to the scheduling signal.

[0087] The photovoltaic mode and the solar thermal mode of the same energy collection unit are mutually exclusive, that is, the same energy collection unit can only enter one of the photovoltaic mode and the solar thermal mode at the same time; and the more energy collection units that enter the photovoltaic mode, the higher the power generation power of the power generation system will be, but the storage rate of solar energy will be lower, and the power generation power of the power generation system will be lower after the sun sets; the more energy collection units that enter the solar thermal mode, the lower the power generation power of the power generation system will be, but the storage rate of solar energy will be higher, and the power generation power of the power generation system will be higher after the sun sets.

[0088] It should be noted that even if the energy collection unit enters the photothermal mode, the photovoltaic panel of the energy collection unit still receives light to generate photovoltaic efficiency. It is just that when the energy collection unit enters the photothermal mode, the heliostat of the energy collection unit is at a photothermal angle to the sun, and the angle between the photovoltaic panel of the energy collection unit and the sun is not a photovoltaic angle, so the photovoltaic efficiency generated by the photovoltaic panel is not the greatest. In other words, when the energy collection unit enters the photothermal mode, the power generation system can not only have a higher solar energy storage rate, but also generate a certain system photovoltaic power generation power.

[0089] Step S530, the step of determining the energy collection units entering the photovoltaic mode, is used to determine an appropriate number of energy collection units entering the photovoltaic mode and an appropriate number of energy collection units entering the solar thermal mode, so that the power generation power of the power generation system is appropriate while storing as much solar energy as possible to obtain a higher solar energy utilization efficiency.

[0090] In some embodiments, such as Figure 6 As shown, step S530, the step of determining the energy collection unit entering the photovoltaic mode includes: step S531, determining the photothermal mode sequence of each energy collection unit based on the photothermal efficiency of each energy collection unit; step S532, based on the photovoltaic power generation preset value, determining the energy collection unit entering the photovoltaic mode according to the photothermal mode sequence; step S534, determining the energy collection unit entering the photothermal mode based on the energy collection unit determined to enter the photovoltaic mode; step S540, in the step of generating a scheduling signal, generating the scheduling signal according to the energy collection unit entering the photothermal mode and the energy collection unit entering the photothermal mode.

[0091] Different energy collection units are located in different positions, have different relative positions to the thermal collector tower, and have different angles to the sun. Different energy collection units have different efficiencies in reflecting light to the thermal collector tower to heat the molten salt, and have different solar energy storage rates. At the same time, the photovoltaic power generation preset values ​​of different energy collection units are not much different. Therefore, in the step of determining the energy collection unit that enters the photovoltaic mode, the energy collection unit that enters the photovoltaic mode is determined based on the photothermal efficiency of different energy collection units, which can achieve maximum storage of solar energy while obtaining appropriate system photovoltaic power generation power.

[0092] Specifically, step S530, the step of determining the energy collection unit entering the photovoltaic mode also includes: step S533, obtaining the photothermal efficiency of each energy collection unit. Specifically, the step of obtaining the photothermal efficiency of each energy collection unit includes: based on the relative position between an energy collection unit and the sun, obtaining the photothermal efficiency of the energy collection unit.

[0093] The photothermal efficiency of an energy collection unit refers to the efficiency of the energy collection unit in reflecting light to the heat collection tower to store solar energy. The photothermal efficiency of an energy collection unit may vary depending on the relative position between the energy collection unit and the sun.

[0094] Specifically, in some embodiments, the step of obtaining the photothermal efficiency of an energy collection unit based on the relative position between the energy collection unit and the sun includes: based on the position of the energy collection unit and the position of the sun, obtaining the relative position between the energy collection unit and the sun, and then obtaining the photothermal efficiency of the energy collection unit.

[0095] For example, based on the relative position between an energy collection unit and the sun, the step of obtaining the light-heat efficiency of the energy collection unit further includes: obtaining the position of an energy collection unit and the position of the sun. Specifically, in the step of obtaining the position of an energy collection unit and the position of the sun, the position can be obtained through a global positioning system (e.g., Global Positioning System, GPS); the position of the sun can be obtained based on an astronomical calendar and time and date.

[0096] It should be noted that in other embodiments of the present invention, in the step of obtaining the photothermal efficiency of an energy collection unit based on the relative position between the energy collection unit and the sun, the relative position between the energy collection unit and the sun can also be directly obtained by a detector to obtain the photothermal efficiency of the energy collection unit.

[0097] After determining the photothermal efficiency of each energy collection unit, step S531 is executed to determine the photothermal mode sequence of each energy collection unit based on the photothermal efficiency of each energy collection unit. The photothermal mode sequence is a ranking of different energy collection units based on the photothermal efficiency.

[0098] Specifically, in the step of determining the photothermal mode sequence of each energy collection unit, based on the photothermal efficiency of each energy collection unit, each energy collection unit is sorted from low to high to obtain the photothermal mode sequence: in the photothermal mode sequence, the energy collection unit with a higher ranking has a lower photothermal efficiency, and the energy collection unit with a lower ranking has a higher photothermal efficiency.

[0099] The photovoltaic power generation preset value is the most suitable photovoltaic power generation preset value for the preset power generation system. The photovoltaic power generation preset value can be a preset predicted value or a historical value, or can be set according to the grid demand. In some embodiments, the scheduling method further includes: determining the photovoltaic power generation preset value based on at least one of the predicted power generation average value, the historical power generation average value and the grid demand value. The predicted power generation average value can be determined by a simulation method; the historical power generation average value can be determined based on historical data; and the grid demand value can be determined based on the design of the grid.

[0100] Specifically, in the step of determining the energy collection unit entering the photovoltaic mode, each energy collection unit enters the photovoltaic mode in turn according to the photothermal mode sequence, and an energy collection unit with an earlier ranking in the photothermal mode sequence and a lower photothermal efficiency is given priority to enter the photovoltaic mode; as the number of energy collection units entering the photovoltaic mode increases, the photovoltaic power generation preset value of the power generation system increases cumulatively until the photovoltaic power generation preset value of the power generation system reaches the photovoltaic power generation preset value.

[0101] When it is determined that the energy collection unit enters the photovoltaic mode and the photovoltaic power generation preset value of the power generation system reaches the photovoltaic power generation preset value, step S534 is executed to determine the energy collection unit entering the photothermal mode based on the energy collection unit determined to enter the photovoltaic mode.

[0102] Specifically, in the step of determining the energy collection units that enter the photothermal mode, the energy collection units that enter the photovoltaic mode are determined, and when the photovoltaic power generation preset value of the power generation system reaches the photovoltaic power generation preset value, the remaining number of energy collection units are determined to enter the photothermal mode.

[0103] Continue to refer Figure 5 and Figure 6After determining the energy collection units that enter the photovoltaic mode and the photothermal mode respectively, step S540 is executed to generate a scheduling signal. Specifically, the scheduling signal is suitable for driving some energy collection units to enter the photovoltaic mode; the scheduling signal is suitable for driving some energy collection units to enter the photothermal mode.

[0104] like Figure 5 As shown, in step S510, in the step of controlling the energy collection unit to enter the photovoltaic mode, based on the scheduling signal, the corresponding energy collection unit is controlled to enter the photovoltaic mode; in step S520, in the step of controlling the energy collection unit to enter the solar thermal mode, based on the scheduling signal, the corresponding energy collection unit is controlled to enter the solar thermal mode.

[0105] When the solar altitude angle is small, sunlight is incident in a direction with a large inclination, and the energy collection unit may be blocked by surrounding energy collection units, thereby affecting its photovoltaic efficiency. In some embodiments of the present invention, the energy collection unit entering the photovoltaic mode determines the photovoltaic angle based on the photovoltaic algorithm to obtain the maximum photovoltaic efficiency; the energy collection unit entering the photothermal mode determines the photothermal angle based on the photothermal algorithm to reflect sunlight to the collector tower.

[0106] It should be noted that, in some other embodiments of the present invention, the scheduling method can also enable all energy collection units to enter the photothermal mode when the solar altitude angle is small, so as to improve the impact of shading of different energy collection units on photovoltaic efficiency.

[0107] In some other embodiments of the present invention, the scheduling method includes: judging whether the lighting conditions are suitable for photovoltaic power generation based on the solar altitude angle; when it is judged that the lighting conditions are not suitable for photovoltaic power generation, in the step of controlling the energy collection unit to enter the photothermal mode, all the energy collection units are controlled to enter the photothermal mode; in the step of controlling the energy collection unit to enter the photovoltaic mode, no energy collection unit is controlled to enter the photovoltaic mode.

[0108] Specifically, the scheduling method includes: before determining the energy collection unit to enter the photovoltaic mode, judging whether the lighting conditions are suitable for photovoltaic power generation based on the solar altitude angle; when it is judged that the lighting conditions are not suitable for photovoltaic power generation, determining the energy collection unit that has not entered the photovoltaic mode, and then generating a corresponding scheduling signal; when it is judged that the lighting conditions are suitable for photovoltaic power generation, determining the energy collection unit that has entered the photovoltaic mode to generate a corresponding scheduling signal.

[0109] In some embodiments, the step of determining whether the lighting conditions are suitable for photovoltaic power generation includes: determining the position of the sun based on the time and date according to the astronomical calendar; and determining the solar altitude angle based on the position of the sun to determine whether the lighting conditions are suitable for photovoltaic power generation.

[0110] In other embodiments of the present invention, the step of determining whether the lighting conditions are suitable for photovoltaic power generation may also include: obtaining the solar altitude angle, that is, directly obtaining the solar altitude angle through a detection device, thereby determining the solar altitude angle to determine whether the lighting conditions are suitable for photovoltaic power generation.

[0111] Continue to refer Figure 5 In some embodiments of the present invention, the scheduling method further includes: step S550, monitoring the photovoltaic power generation of the system; step S530, determining the energy collection unit entering the photovoltaic mode, based on the result of monitoring the photovoltaic power generation of the system, determining the energy collection unit entering the photovoltaic mode.

[0112] Photovoltaic power generation has the characteristics of high efficiency and poor power generation stability. Step S550, the step of monitoring the photovoltaic power generation power of the system, is used to obtain the photovoltaic power generation preset value of the power generation system in real time, and adjust the power generation mode of each energy collection unit accordingly, so as to improve the stability of the photovoltaic power generation preset value while achieving the highest possible utilization rate of solar energy.

[0113] In some embodiments, when the photovoltaic power generation power of the system is greater than the photovoltaic power generation preset value, in the step of determining the energy collection units entering the photovoltaic mode, a part of the energy collection units entering the photovoltaic mode are switched to the photothermal mode; when the photovoltaic power generation power of the system is less than the photovoltaic power generation preset value, in the step of determining the energy collection units entering the photovoltaic mode, a part of the energy collection units entering the photothermal mode are switched to the photovoltaic mode.

[0114] In the process of monitoring the photovoltaic power generation power of the system, when it is found that the photovoltaic power generation power of the system is higher than the preset photovoltaic power generation preset value, the energy collection unit in the photovoltaic mode is converted to the photothermal mode to reduce the photovoltaic power generation power of the system, so that more solar energy can be stored to obtain a higher solar energy utilization rate; when it is found that the photovoltaic power generation power of the system is lower than the preset photovoltaic power generation preset value, the energy collection unit in the photothermal mode is converted to the photovoltaic mode to increase the photovoltaic power generation power of the system, thereby ensuring the stability of the photovoltaic power generation power of the system.

[0115] It should be noted that, in some embodiments, when the photovoltaic power generation power of the system is equal to the photovoltaic power generation preset value, in the step of determining the energy collection unit entering the photovoltaic mode, the energy collection unit entering the photovoltaic mode is maintained unchanged.

[0116] Correspondingly, the present invention also provides a power generation system.

[0117] like Figure 4As shown, the power generation system includes: a heat collection tower 202; and a plurality of energy collection units 201, wherein the plurality of energy collection units 201 are distributed around the heat collection tower 202, and the energy collection units 201 are the energy collection units of the present invention.

[0118] The heat collecting tower 202 may also be referred to as a molten salt tower. The top 203 of the heat collecting tower 202 is provided with molten salt for heating and storing thermal energy. The plurality of energy collection units 201 are distributed on the ground around the heat collecting tower 202 in a preset arrangement.

[0119] Specifically, Figure 4 As shown, the plurality of energy collection units 201 are distributed in concentric circles with the heat collection tower 202 as the center. In other embodiments of the present invention, the plurality of energy collection units may also be distributed in concentric directions with the heat collection tower as the geometric center.

[0120] Combined with reference Figure 6 The power generation system further includes: a control module 300, wherein the control module 300 is configured to control the energy collection unit 201 to enter a photovoltaic mode, wherein when entering the photovoltaic mode, the photovoltaic panel of the energy collection unit 201 faces the sun; the control module 300 is also configured to control the energy collection unit 201 to enter a photothermal mode, wherein when entering the photothermal mode, the heliostat of the energy collection unit 201 reflects sunlight to a thermal collection tower.

[0121] It should be noted that, in some embodiments of the present invention, the control module 300 schedules the multiple energy collection units 201 through the scheduling method of the power generation system of the present invention. The specific technical solution of the control module 300 can refer to the above-mentioned embodiment of the scheduling method.

[0122] The photovoltaic panel of the energy harvesting unit in photovoltaic mode is facing the sun (such as Figure 1 As shown, the photovoltaic panel receives sunlight for photovoltaic power generation; the heliostat of the energy collection unit entering the photothermal mode faces the sun (as shown Figure 3 As shown), the heliostats reflect light to the collector tower.

[0123] The control module 300 can control the appropriate energy collection unit 201 to enter the photovoltaic mode or the solar thermal mode based on the specific situation, and can make the number of energy collection units 201 entering the photovoltaic mode appropriate to obtain the appropriate system electric power and improve the stability of the power generation efficiency of the power generation system; it can also make the energy collection unit with too high temperature enter the solar thermal mode to store energy, thereby improving the utilization rate of solar energy while avoiding the decrease in power generation efficiency of the photovoltaic panel caused by high temperature.

[0124] In some embodiments of the present invention, Figure 6As shown, the control module 300 includes: a screening unit 310, the screening unit 310 is configured to determine the energy collection unit entering the photovoltaic mode; a scheduling unit 320, the scheduling unit 320 is configured to generate a scheduling signal; the control module 300 controls the energy collection unit to enter the photovoltaic mode according to the scheduling signal.

[0125] The photovoltaic mode and the solar thermal mode of the same energy collection unit are mutually exclusive, that is, the same energy collection unit can only enter one of the photovoltaic mode and the solar thermal mode at the same time; and the more energy collection units that enter the photovoltaic mode, the higher the power generation power of the power generation system will be, but the storage rate of solar energy will be lower, and the power generation power of the power generation system will be lower after the sun sets; the more energy collection units that enter the solar thermal mode, the lower the power generation power of the power generation system will be, but the storage rate of solar energy will be higher, and the power generation power of the power generation system will be higher after the sun sets.

[0126] The screening unit 310 is used to determine an appropriate number of energy collection units to enter the photovoltaic mode and an appropriate number of energy collection units to enter the photothermal mode, so that the power generation power of the power generation system is appropriate while storing as much solar energy as possible to obtain higher solar energy utilization efficiency.

[0127] In some embodiments, such as Figure 7 As shown, the screening unit 310 includes: a sequencer 311, the sequencer 311 is configured to determine the photothermal mode sequence of each energy collection unit based on the photothermal efficiency of each energy collection unit; a photovoltaic determiner 312, the photovoltaic determiner 312 is configured to determine the energy collection unit entering the photovoltaic mode according to the photothermal mode sequence based on a preset value of photovoltaic power generation; a photothermal determiner 313, the photothermal determiner 313 is configured to determine the energy collection unit entering the photothermal mode based on the energy collection unit determined to enter the photovoltaic mode; the scheduling unit 320 generates the scheduling signal according to the energy collection unit entering the photothermal mode and the energy collection unit entering the photothermal mode.

[0128] Different energy collection units are located in different positions, have different relative positions to the thermal collector tower, and have different angles to the sun. Different energy collection units have different efficiencies in reflecting light to the thermal collector tower to heat the molten salt, and have different solar energy storage rates. At the same time, the photovoltaic power generation preset values ​​of different energy collection units are not much different. Therefore, the screening unit 310 determines the energy collection unit that enters the photovoltaic mode based on the photothermal efficiency of different energy collection units, and can achieve maximum storage of solar energy while obtaining appropriate system photovoltaic power generation power.

[0129] Specifically, the sequencer 311 is further configured to obtain the photothermal efficiency of each energy collection unit. Specifically, the sequencer 311 is configured to obtain the photothermal efficiency of an energy collection unit based on the relative position between an energy collection unit and the sun.

[0130] The photothermal efficiency of an energy collection unit refers to the efficiency of the energy collection unit in reflecting light to the heat collection tower to store solar energy. The photothermal efficiency of an energy collection unit may vary depending on the relative position between the energy collection unit and the sun.

[0131] Specifically, in some embodiments, the sequencer 311 obtains the relative position between an energy collection unit and the sun based on the position of the energy collection unit and the position of the sun, and further obtains the photothermal efficiency of the energy collection unit.

[0132] For example, the sequencer 311 is further configured to obtain the position of an energy collection unit and the position of the sun. Specifically, the sequencer 311 can obtain the position of the energy collection unit through a global positioning system (e.g., Global Positioning System, GPS) provided on the energy collection unit; the sequencer 311 stores an astronomical calendar and a timer, and the sequencer 311 can obtain the position of the sun based on the astronomical calendar and the time and date.

[0133] It should be noted that, in other embodiments of the present invention, the sequencer 311 can also directly obtain the relative position between the energy collection unit and the sun through a detector arranged on the energy collection unit to obtain the photothermal efficiency of the energy collection unit.

[0134] After determining the photothermal efficiency of each energy collection unit, the sequencer 311 determines the photothermal mode sequence of each energy collection unit based on the photothermal efficiency of each energy collection unit. The photothermal mode sequence is the order of different energy collection units based on the photothermal efficiency.

[0135] Specifically, the sequencer 311 sorts the energy collection units from low to high based on the photothermal efficiency of each energy collection unit to obtain the photothermal mode sequence: in the photothermal mode sequence, the energy collection units ranked higher have lower photothermal efficiency, and the energy collection units ranked lower have higher photothermal efficiency.

[0136] The photovoltaic power generation preset value is the photovoltaic power generation preset value that is most suitable for the preset power generation system. The photovoltaic power generation preset value can be a preset predicted value or a historical value, or it can be set according to the power grid demand. Figure 7As shown, in some embodiments, the control module 300 further includes: a photovoltaic power unit 330, and the photovoltaic power unit 330 is configured to determine a photovoltaic power generation preset value based on at least one of a predicted power generation average value, a historical power generation average value, and a power grid demand value. The predicted power generation average value can be determined by a simulation method; the historical power generation average value can be determined based on historical data; and the power grid demand value can be determined based on the design of the power grid.

[0137] Specifically, the photovoltaic determiner 312 enables each energy collection unit to enter the photovoltaic mode in sequence according to the photothermal mode sequence, and the energy collection unit with a higher ranking and lower photothermal efficiency in the photothermal mode sequence has higher priority in entering the photovoltaic mode; as the number of energy collection units entering the photovoltaic mode increases, the photovoltaic power generation preset value of the power generation system increases cumulatively until the photovoltaic power generation preset value of the power generation system reaches the photovoltaic power generation preset value.

[0138] When the energy collection unit entering the photovoltaic mode is determined and the photovoltaic power generation preset value of the power generation system reaches the photovoltaic power generation preset value, the photothermal determiner 313 determines the energy collection unit entering the photothermal mode based on the energy collection unit determined to enter the photovoltaic mode.

[0139] Specifically, when the energy collection units entering the photovoltaic mode are determined and the photovoltaic power generation preset value of the power generation system reaches the photovoltaic power generation preset value, the photothermal determiner 313 determines that the remaining number of energy collection units enter the photothermal mode.

[0140] After the screening unit 310 determines the energy collection units that enter the photovoltaic mode and the photothermal mode, the scheduling unit 320 generates a scheduling signal based on the energy collection units that enter the photovoltaic mode and the energy collection units that enter the photothermal mode. Specifically, the scheduling signal is suitable for driving some energy collection units to enter the photovoltaic mode; the scheduling signal is suitable for driving some energy collection units to enter the photothermal mode.

[0141] Continue to refer Figure 7 In some embodiments, the control module 300 further includes: a monitoring unit 340, wherein the monitoring unit 340 is configured to monitor the photovoltaic power generation power of the system; and the screening unit 310 is configured to determine the energy collection unit that enters the photovoltaic mode based on the result of the monitoring unit 340 monitoring the photovoltaic power generation power of the system.

[0142] Photovoltaic power generation has the characteristics of high efficiency and poor power generation stability. The monitoring unit 340 is used to obtain the photovoltaic power generation preset value of the power generation system in real time, and adjust the power generation mode of each energy collection unit accordingly, so as to improve the stability of the photovoltaic power generation preset value while achieving the highest possible utilization rate of solar energy.

[0143] In some exemplary embodiments, when the monitoring unit 340 determines that the photovoltaic power generation power of the system is greater than the photovoltaic power generation preset value, the screening unit 310 determines that a part of the energy collection units entering the photovoltaic mode are switched to the solar thermal mode; when the monitoring unit 340 determines that the photovoltaic power generation power of the system is less than the photovoltaic power generation preset value, the screening unit 310 determines that a part of the energy collection units entering the solar thermal mode are switched to the photovoltaic mode.

[0144] In the process of the monitoring unit 340 real-time monitoring the system photovoltaic power generation power of the power generation system, when the system photovoltaic power generation power is higher than the preset photovoltaic power generation preset value, the screening unit 310 changes the energy collection unit in the photovoltaic mode to the photothermal mode to reduce the system photovoltaic power generation power, so that more solar energy can be stored to obtain a higher solar energy utilization rate; when the system photovoltaic power generation power is lower than the preset photovoltaic power generation preset value, the screening unit 310 changes the energy collection unit in the photothermal mode to the photovoltaic mode to increase the system photovoltaic power generation power, thereby ensuring the stability of the system photovoltaic power generation power.

[0145] It should be noted that, in some embodiments, when the photovoltaic power generation power of the system is equal to the photovoltaic power generation preset value, the screening unit 310 maintains the energy collection unit in the photovoltaic mode unchanged.

[0146] In summary, the energy collection structure includes: a photovoltaic panel and a heliostat, and along the axial direction perpendicular to the first rotating shaft, the photovoltaic panel and the heliostat are located on both sides of the first rotating shaft. The energy collection structure includes a photovoltaic panel and a heliostat, and the energy collection unit can enter a photovoltaic mode or a photothermal mode as needed to improve the utilization effect of solar energy by the power generation system.

[0147] Moreover, the control module of the power generation system can determine the energy collection unit that enters the photovoltaic mode according to the preset photovoltaic power generation preset value, which can effectively ensure the stability of the system's photovoltaic power generation power, so that the system's photovoltaic power generation power matches the grid demand, so as to further improve the power generation system's utilization of solar energy.

[0148] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. An energy collection unit, characterized in that: include: A bracket, the bracket comprising a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft are fixed at a preset angle; An energy collection structure, the energy collection structure comprising: a photovoltaic panel and a heliostat, wherein the photovoltaic panel and the heliostat are located on both sides of the first rotating shaft in an axial direction perpendicular to the first rotating shaft.

2. The energy collection unit according to claim 1, characterized in that The first rotating axis and the second rotating axis are perpendicular to each other.

3. The energy collection unit according to claim 1, characterized in that The collection surface of the photovoltaic panel and the reflection surface of the heliostat are arranged opposite to each other.

4. The energy collection unit according to claim 1 or 3, characterized in that: The first rotating shaft has a first fixed surface and a second fixed surface parallel to each other; The photovoltaic panel is fixed to the first fixing surface; The heliostat is fixed to the second fixing surface.

5. The energy collection unit according to claim 3, characterized in that: The collection surface of the photovoltaic panel and the reflection surface of the heliostat are parallel to each other.

6. The energy collection unit according to claim 1, characterized in that: Also includes: A connecting member, the connecting member is sleeved on the periphery of the first rotating shaft, and the connecting member is fixedly connected to the second rotating shaft; Along the axial direction of the first rotating shaft, a portion of the first rotating shaft located on one side of the connecting member is a first fixing portion of the first rotating shaft, and a portion of the first rotating shaft located on the other side of the connecting member is a second fixing portion of the first rotating shaft; The energy collection unit has two energy collection structures, and the two energy collection structures are respectively connected to the first fixing portion and the second fixing portion of the first rotating shaft.

7. The energy collection unit according to claim 1, characterized in that: Also includes: a first motor, the first motor being adapted to drive the energy collection structure to move around the first rotation axis; The second motor is suitable for driving the first rotating shaft to move around the second rotating shaft.

8. The energy collection unit according to claim 7, characterized in that: Also includes: A controller is connected to the first motor and the second motor, and a photovoltaic algorithm and a photothermal algorithm are arranged in the controller.

9. A power generation system, characterized in that: include: Thermal tower; A plurality of energy collection units are distributed around the thermal collection tower, and the energy collection units are as described in any one of claims 1 to 8.

10. The power generation system according to claim 9, characterized in that: Also includes: A control module, wherein the control module is configured to control the energy collection unit to enter a photovoltaic mode, wherein when entering the photovoltaic mode, the photovoltaic panel of the energy collection unit is at a photovoltaic angle with the sun to obtain maximum photovoltaic efficiency; the control module is also configured to control the energy collection unit to enter a photothermal mode, wherein when entering the photothermal mode, the heliostat of the energy collection unit is at a photothermal angle with the sun to reflect sunlight to a thermal collection tower.

11. The power generation system according to claim 10, characterized in that: The control module comprises: a screening unit configured to determine an energy collection unit to enter a photovoltaic mode; a scheduling unit, wherein the scheduling unit is configured to generate a scheduling signal; The control module controls the energy collection unit to enter a photovoltaic mode according to the scheduling signal.

12. The power generation system according to claim 11, characterized in that: The screening unit comprises: a sequencer configured to determine a photothermal mode sequence of each energy harvesting unit based on the photothermal efficiency of each energy harvesting unit; a photovoltaic determiner, the photovoltaic determiner being configured to determine an energy collection unit that enters a photovoltaic mode based on a photovoltaic power generation preset value and according to the photothermal mode sequence; a photothermal determiner configured to determine the energy collection unit entering the photothermal mode based on the energy collection unit determined to enter the photovoltaic mode; The scheduling unit generates the scheduling signal according to the energy collection unit entering the photothermal mode and the energy collection unit entering the photothermal mode.

13. The power generation system according to claim 12, characterized in that: The control module further includes: a photovoltaic power unit, wherein the photovoltaic power unit is configured to determine a photovoltaic power generation preset value based on at least one of a predicted power generation average value, a historical power generation average value, and a grid demand value.

14. The power generation system according to claim 11, characterized in that: The control module further comprises: a monitoring unit, the monitoring unit being configured to monitor the photovoltaic power generation power of the system; The screening unit is configured to determine the energy collection unit to enter the photovoltaic mode based on the result of the monitoring unit monitoring the photovoltaic power generation of the system.

15. The power generation system according to claim 14, characterized in that: When the monitoring unit determines that the photovoltaic power generation power of the system is greater than the photovoltaic power generation preset value, the screening unit determines that a portion of the energy collection units that have entered the photovoltaic mode are switched to the photothermal mode; When the monitoring unit determines that the photovoltaic power generation power of the system is less than the photovoltaic power generation preset value, the screening unit determines that a portion of the energy collection units that have entered the photothermal mode are switched to the photovoltaic mode.

16. A method for dispatching a power generation system, characterized in that: The power generation system comprises: a heat collection tower; a plurality of energy collection units, wherein the plurality of energy collection units are distributed around the heat collection tower, and the energy collection units are as described in any one of claims 1 to 8; The scheduling method comprises: Controlling the energy collection unit to enter a photovoltaic mode, wherein when entering the photovoltaic mode, the photovoltaic panel of the energy collection unit is at a photovoltaic angle with the sun to obtain maximum photovoltaic efficiency; The energy collection unit is controlled to enter a photothermal mode, wherein when entering the photothermal mode, the heliostat of the energy collection unit forms a photothermal angle with the sun to reflect sunlight to a heat collection tower.

17. The scheduling method according to claim 16, characterized in that: Also includes: Determine the energy harvesting unit to enter photovoltaic mode; generating a scheduling signal; In the step of controlling the energy collection unit to enter the photovoltaic mode, the energy collection unit is controlled to enter the photovoltaic mode according to the scheduling signal; The energy collection unit is controlled to enter the photothermal mode. According to the scheduling signal, the energy collection unit is controlled to enter the photothermal mode.

18. The scheduling method according to claim 17, characterized in that: The steps to determine an energy harvesting unit to enter photovoltaic mode include: Determining a photothermal mode sequence of each energy collection unit based on the photothermal efficiency of each energy collection unit; Based on the photovoltaic power generation preset value and according to the photothermal mode sequence, determining an energy collection unit to enter the photovoltaic mode; Based on the determined energy collection unit entering the photovoltaic mode, determining the energy collection unit entering the photothermal mode; In the step of generating a scheduling signal, the scheduling signal is generated according to the energy collection unit entering the photothermal mode and the energy collection unit entering the photothermal mode.

19. The scheduling method according to claim 18, characterized in that: Also includes: A photovoltaic power generation preset value is determined based on at least one of a predicted power generation average value, a historical power generation average value, and a grid demand value.

20. The scheduling method according to claim 17, characterized in that: Also includes: Monitoring system photovoltaic power generation; In the step of determining the energy collection unit to enter the photovoltaic mode, the energy collection unit to enter the photovoltaic mode is determined based on the result of monitoring the photovoltaic power generation of the system.

21. The scheduling method according to claim 20, characterized in that: When the photovoltaic power generation power of the system is greater than the photovoltaic power generation preset value, in the step of determining the energy collection units entering the photovoltaic mode, a portion of the energy collection units entering the photovoltaic mode are switched to the photothermal mode; When the photovoltaic power generation power of the system is less than the photovoltaic power generation preset value, in the step of determining the energy collection units entering the photovoltaic mode, a part of the energy collection units entering the photothermal mode are switched to the photovoltaic mode.

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