A photovoltaic power plant output control system, method and servo system

Abstract

The application is suitable for the photovoltaic power generation technical field, and provides a photovoltaic device output control system, method and servo system, the system comprises: a voltage fluctuation monitoring unit, a photovoltaic output adjusting unit and a photovoltaic component unit. The voltage fluctuation monitoring unit is used for determining a photovoltaic device output range based on a fluctuation voltage value allowed by a power grid and characteristics of the photovoltaic device; the photovoltaic output adjusting unit is used for adjusting the output of the photovoltaic component unit to be consistent with the photovoltaic device output range; and the photovoltaic component unit delivers electric energy to the power grid based on the adjustment of the photovoltaic output adjusting unit. The application adjusts the output of the photovoltaic device, suppresses the fluctuation influence of the access of the photovoltaic device on the power grid system, and simultaneously replaces lithium batteries with a hydraulic system of a photovoltaic adjusting unit as an energy storage unit, so that the existing price of the photovoltaic device can be greatly reduced.

Description

Technical Field

[0001] This application belongs to the field of photovoltaic power generation technology, and in particular relates to a photovoltaic equipment output control system, method and servo system. Background Technology

[0002] Existing distributed photovoltaic (PV) panels and PV energy equipment all face the problem of being "dependent on weather conditions," meaning their output when connected to the grid is often uncontrollable. To maintain the stability of the grid system, current technologies mostly employ methods such as adding energy storage batteries to PV equipment or directly curtailing solar power.

[0003] However, with the continuous rise in lithium ore prices, the price of energy storage batteries has also increased, affecting the pricing of photovoltaic equipment.

[0004] Therefore, how to adjust photovoltaic output in a low-cost and effective manner to ensure the stable operation of the power grid system has become an urgent problem to be solved. Summary of the Invention

[0005] To overcome the problems existing in related technologies, this application provides a photovoltaic equipment output control system, method and servo system. By adjusting the output of the photovoltaic equipment, the fluctuation impact of the photovoltaic equipment connection on the power grid system is suppressed. At the same time, by using the hydraulic system of the photovoltaic adjustment unit to replace the lithium battery as the energy storage unit, the existing price of photovoltaic equipment can be greatly reduced.

[0006] This application is achieved through the following technical solution:

[0007] In a first aspect, embodiments of this application provide a photovoltaic (PV) equipment output control system, comprising: a voltage fluctuation monitoring unit, a PV output adjustment unit, and a PV module unit. The voltage fluctuation monitoring unit is used to determine the output range of the PV equipment based on the allowable voltage fluctuation value of the power grid and the characteristics of the PV equipment; the PV output adjustment unit is used to adjust the output of the PV module unit to conform to the output range of the PV equipment; and the PV module unit transmits electrical energy to the power grid based on the adjustment result of the PV output adjustment unit.

[0008] In one possible implementation of the first aspect, the photovoltaic output adjustment unit includes a hydraulic system and a servo system. The servo system receives the output range of the photovoltaic equipment, determines the light-receiving area of ​​the photovoltaic panels in the photovoltaic module unit based on the output range, and controls the hydraulic system to perform a preset operation based on the light-receiving area, so that the output of the photovoltaic module unit conforms to the output range of the photovoltaic equipment.

[0009] In one possible implementation of the first aspect, the hydraulic system includes a cold water storage tank, a hot water storage tank, an inlet pipe, an outlet pipe, and multiple transparent water tanks. The cold water storage tank is connected to the inlet pipe, the hot water storage tank is connected to the outlet pipe, and the inlet and outlet pipes are connected through the transparent water tanks. The cold water storage tank stores cold water from the water supply system, the hot water storage tank stores hot water heated by sunlight, and the transparent water tanks receive cold water from the cold water storage tank through the inlet pipe and transport the heated hot water to the hot water storage tank through the outlet pipe. The transparent water tanks are located above the photovoltaic panels in the photovoltaic module unit, wherein the length of the transparent water tank is the same as the length of the photovoltaic panel in the photovoltaic module unit, and the transparent water tanks adopt a layered partition design.

[0010] In one possible implementation of the first aspect, the servo system controls the hydraulic system to perform preset operations based on the light-receiving area, including: obtaining the area of ​​the photovoltaic panel shaded by the transparent water tank based on the light-receiving area; transporting water from the cold water storage tank to the transparent water tank via an inlet pipe, or transporting water from the transparent water tank to the cold water storage tank via an inlet pipe, and changing the amount of solar radiation absorbed by the photovoltaic module unit by adjusting the area of ​​water in the transparent water tank, so that the output of the photovoltaic module unit conforms to the output range of the photovoltaic equipment.

[0011] In one possible implementation of the first aspect, the hydraulic system also includes a temperature control switch. The temperature control switch senses the temperature of the hot water in the transparent water tank. When the temperature of the hot water in the transparent water tank reaches a preset temperature threshold of the temperature control switch, the valve of the temperature control switch opens, and the hot water flows into the hot water storage tank through the outlet pipe.

[0012] Secondly, embodiments of this application provide a photovoltaic equipment output control method employing the photovoltaic equipment output control system as provided in the first aspect, applied to a servo system of a photovoltaic output adjustment unit. The photovoltaic equipment output control method includes: receiving the output range of the photovoltaic equipment; determining the light-receiving area of ​​the photovoltaic panel in the photovoltaic module unit based on the output range of the photovoltaic equipment; and controlling the hydraulic system to perform a preset operation based on the light-receiving area, so that the output of the photovoltaic module unit conforms to the output range of the photovoltaic equipment.

[0013] In one possible implementation of the second aspect, the output of the photovoltaic module unit conforms to the output range of the photovoltaic equipment, including:

[0014] The output range of the photovoltaic equipment is determined based on the voltage fluctuations allowed by the power grid and the characteristics of the photovoltaic equipment.

[0015] The output of a photovoltaic (PV) module unit is determined by the amount of solar radiation and the light-receiving area of ​​the PV panels within the unit. The expression for the output of a PV module unit is:

[0016]

[0017] In the formula, This indicates the amount of solar radiation. This indicates the actual light-receiving area of ​​the photovoltaic panel. This indicates the efficiency of a photovoltaic module in converting solar radiation. This indicates the efficiency with which photovoltaic modules convert solar radiation into electrical energy.

[0018] In one possible implementation of the second aspect, the light-receiving area of ​​the photovoltaic panel in the photovoltaic module unit is determined based on the output range of the photovoltaic equipment, including:

[0019] Based on the expression that the output of a photovoltaic module unit conforms to the output range of a photovoltaic device, the light-receiving area of ​​the photovoltaic panel in the photovoltaic module unit is determined. The expression for the maximum light-receiving area of ​​the photovoltaic panel is:

[0020]

[0021] In one possible implementation of the second aspect, based on the light-receiving area, the servo system is controlled to cause the hydraulic system to perform a preset operation, including:

[0022] Based on the light-receiving area, the area of ​​the photovoltaic panel not obstructed by the transparent water tank is obtained. The expression for the area of ​​the photovoltaic panel not obstructed by the transparent water tank is:

[0023]

[0024] In the formula, This indicates the area of ​​the photovoltaic panels that are not obscured by the transparent water tank. This indicates the light-receiving area of ​​the photovoltaic panel that is blocked by the transparent water tank. This indicates the width of the photovoltaic panel obscured by the transparent water tank.

[0025] Based on the area of ​​the photovoltaic panels obscured by the transparent water tank, the servo system delivers water from the cold water storage tank to the transparent water tank via an inlet pipe, or delivers water from the transparent water tank to the cold water storage tank via an inlet pipe. By adjusting the area of ​​the water in the transparent water tank, the amount of solar radiation absorbed by the photovoltaic module unit is changed, so that the output of the photovoltaic module unit matches the output range of the photovoltaic equipment. The expression for the output of the photovoltaic module unit after the photovoltaic panel area is obscured by the transparent water tank is:

[0026]

[0027] In the formula, This represents the attenuation coefficient of solar radiation after passing through a unit area of ​​water. It is the height of the water level in the transparent water tank.

[0028] Thirdly, embodiments of this application provide a servo system, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor executes the computer program, it implements the photovoltaic equipment output control method as described in any of the second aspects.

[0029] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the photovoltaic equipment output control method as described in any of the second aspects.

[0030] Fifthly, embodiments of this application provide a computer program product that, when running on a servo system, causes the servo system to execute the photovoltaic equipment output control method described in any one of the second aspects above.

[0031] It is understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here.

[0032] The beneficial effects of the embodiments in this application compared with the prior art are:

[0033] In this embodiment, the output range of the photovoltaic (PV) equipment is first determined by a voltage fluctuation monitoring unit. Then, a PV output adjustment unit adjusts the output of the PV module unit based on this range, ensuring that the output of the PV module unit matches the output range of the PV equipment. Finally, the PV module unit transmits electrical energy to the grid according to the adjusted output. By adjusting the output of the PV equipment, this application not only suppresses the impact of PV equipment connection on grid system fluctuations but also significantly reduces the manufacturing cost of the PV equipment by replacing lithium batteries with a hydraulic system of the PV adjustment unit as the energy storage unit.

[0034] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of a photovoltaic equipment output control system provided in an embodiment of this application;

[0037] Figure 2This is a schematic block diagram illustrating the functions of a servo system provided in one embodiment of this application;

[0038] Figure 3 This is a schematic flowchart of a photovoltaic equipment output control method provided in an embodiment of this application;

[0039] Figure 4 This is a schematic diagram of the servo system provided in the embodiments of this application.

[0040] In the diagram: 1 Voltage fluctuation monitoring unit; 3 Photovoltaic module unit; 21 Servo system; 221 Cold water storage tank; 222 Inlet water pipe; 223 Transparent water tank; 224 Outlet water pipe; 225 Temperature control switch; 226 Hot water storage tank. Detailed Implementation

[0041] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0042] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0043] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0044] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0045] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0047] Compared to traditional long-distance power transmission, distributed photovoltaic (PV) power can absorb solar energy locally, reducing the load on the power grid to some extent. However, with the grid connection of a large number of distributed PV systems, the distribution system has become a multi-energy system, causing changes in power flow and grid distribution. Furthermore, there is a mismatch between residential electricity load patterns and PV power generation during peak hours, resulting in voltage exceeding the upper limit, increasing line losses, and affecting the normal operation of the power grid.

[0048] Therefore, to ensure the stability of the power grid system, existing technologies often employ the addition of energy storage batteries to distributed photovoltaic systems to regulate the output of photovoltaic equipment connected to the grid. However, with the continuous rise in lithium ore prices, the price of energy storage batteries has also increased, significantly impacting the cost of photovoltaic equipment.

[0049] To address the aforementioned problems, this application provides a photovoltaic equipment output control system, method, and servo system. To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described below are merely illustrative and not intended to limit the scope of this application.

[0050] This embodiment provides a photovoltaic equipment output control system, including a voltage fluctuation monitoring unit, a photovoltaic output adjustment unit, and a photovoltaic module unit. Figure 1 A schematic diagram of a photovoltaic output control system according to an embodiment of this application is shown. For ease of explanation, only the parts relevant to the embodiment of this application are shown; the following refers to... Figure 1 The output control system of photovoltaic equipment is explained.

[0051] In some embodiments, the voltage fluctuation monitoring unit 1 is used to determine the output range of the photovoltaic equipment. The output range of the photovoltaic equipment is determined by the allowable voltage fluctuations of the power grid and the characteristics of the photovoltaic equipment. The photovoltaic module unit 3 stores electrical energy in the grid after adjustment by the photovoltaic output adjustment unit. The photovoltaic output adjustment unit is used to adjust the output of the photovoltaic module unit to conform to the output range of the photovoltaic equipment determined by the voltage fluctuation monitoring unit 1.

[0052] In some embodiments, the photovoltaic output regulating unit may include a hydraulic system.

[0053] For example, the hydraulic system may include a cold water storage tank 221, multiple transparent water tanks 223, and a hot water storage tank 226. The cold water storage tank 221 is used to store cold water from the water supply system, the hot water storage tank 226 is used to store hot water that has been heated by sunlight, and the transparent water tanks 223 are used to receive cold water from the cold water storage tank and to deliver the hot water heated by sunlight to the hot water storage tank.

[0054] Furthermore, the transparent water tank 223 is located above the photovoltaic panel in the photovoltaic module unit 3 to block the solar radiation received by the photovoltaic panel.

[0055] Furthermore, such as Figure 1 As shown, the length of the transparent water tank 223 can be the same as the length of the photovoltaic panel.

[0056] Furthermore, to prevent the water in the transparent water tank 223 from forming water mist due to heating, which would affect the light transmittance of the transparent water tank, the transparent water tank 223 can be designed with layered partitions. It should be noted that the transparent water tank 223 can be divided into sections according to the accuracy requirements of the photovoltaic panel output adjustment. If the output adjustment accuracy requirement is high, it can be further subdivided; if the output adjustment accuracy requirement is not high, larger sections can be used.

[0057] Optionally, the hydraulic system may also include an inlet pipe 222 and an outlet pipe 224. The inlet pipe 222 connects the cold water storage tank 221 and the transparent water tank 223, and the outlet pipe 224 connects the transparent water tank 223 and the hot water storage tank 226.

[0058] Optionally, the height at which the inlet pipe 222 connects to the transparent water tank 223 is higher than the height at which the outlet pipe 224 connects to the transparent water tank 223, so that hot water can flow out from the outlet pipe 224.

[0059] Optionally, the hydraulic system may also include a temperature control switch 225. The temperature control switch 225 can sense the temperature of the hot water in the transparent water tank 223. When the temperature of the hot water reaches the preset temperature threshold of the temperature control switch 225, the valve of the temperature control switch 225 opens, and the hot water flows into the hot water storage tank 226 through the outlet pipe 224.

[0060] In some embodiments, the photovoltaic output regulation unit may further include a servo system 21. Figure 2 This is a schematic block diagram illustrating the functions of a servo system provided in one embodiment of this application. It should be noted that the servo system 21, as an important component of the photovoltaic output regulation unit, has multiple functions, including receiving information from the voltage fluctuation monitoring unit, collecting temperature control switch data, calculating the light-collecting area of ​​the photovoltaic module unit, and controlling the hydraulic system. For ease of explanation, Figure 2 Only some of the functions relevant to the embodiments of this application are shown.

[0061] Reference Figure 2 The servo system 21 is used to receive the output range of the photovoltaic equipment, determine the light-collecting area of ​​the photovoltaic module unit, and control the hydraulic system to perform preset operations based on the light-collecting area, so that the output of the photovoltaic module unit conforms to the output range of the photovoltaic equipment.

[0062] In some embodiments, the servo system controlling the hydraulic system to perform preset operations may include: obtaining the area of ​​the photovoltaic panel blocked by the transparent water tank 223 based on the light-receiving area; transporting water from the cold water storage tank 221 to the transparent water tank 223 through the water inlet pipe 222 based on the area of ​​the photovoltaic panel blocked by the transparent water tank 223; and changing the amount of solar radiation absorbed by the photovoltaic module unit 3 so that the output of the photovoltaic module unit 3 conforms to the output range of the photovoltaic equipment.

[0063] In some embodiments, the servo system controlling the hydraulic system to perform preset operations may further include: obtaining the area of ​​the photovoltaic panel blocked by the transparent water tank 223 based on the light-receiving area; based on the area of ​​the blocked photovoltaic panel, transporting the water in the transparent water tank 223 to the cold water storage tank 221 through the water inlet pipe 222; and changing the amount of solar radiation absorbed by the photovoltaic module unit 3 so that the output of the photovoltaic module unit 3 conforms to the output range of the photovoltaic equipment.

[0064] This application also provides a photovoltaic equipment output control method, which is applied to the servo system of the photovoltaic output adjustment unit in the above-mentioned control system. Figure 3 A schematic flowchart of a photovoltaic equipment output control method according to an embodiment of this application is shown. (Refer to...) Figure 3 The photovoltaic equipment output control method may include steps 101 to 103, as detailed below:

[0065] In step 101, the output range of the photovoltaic equipment is received.

[0066] In some embodiments, the output range of the photovoltaic (PV) equipment is received. The output range of the PV equipment is determined based on the grid-allowed voltage fluctuations and the characteristics of the PV equipment.

[0067] In step 102, the light-receiving area of ​​the photovoltaic panel in the photovoltaic module unit is determined based on the output range of the photovoltaic equipment.

[0068] In some embodiments, the output of a photovoltaic module unit is directly affected by the light-receiving area of ​​the photovoltaic panel. Generally, the light-receiving area is directly proportional to the output of the photovoltaic module; that is, the larger the light-receiving area, the greater the output of the photovoltaic module unit.

[0069] In some embodiments, the output of a photovoltaic module unit is also directly affected by the amount of solar radiation. Generally, the amount of solar radiation is directly proportional to the output of the photovoltaic module; that is, the greater the amount of solar radiation, the greater the output of the photovoltaic module unit.

[0070] Based on the above description, the output of the photovoltaic module unit can be made to match the output range of the photovoltaic equipment by adjusting the amount of solar radiation received by the photovoltaic panel in the photovoltaic module unit and the light-receiving area of ​​the photovoltaic panel.

[0071] For example, the expression for the output of a photovoltaic module unit can be:

[0072]

[0073] In the formula, This indicates the amount of solar radiation. This indicates the actual light-receiving area of ​​the photovoltaic panel; This indicates the efficiency of a photovoltaic module in converting solar radiation. This indicates the efficiency with which photovoltaic modules convert solar radiation into electrical energy.

[0074] In some embodiments, the output of a photovoltaic module unit can be determined to conform to an expression representing the output range of a photovoltaic device:

[0075]

[0076] Furthermore, the expression for the maximum light-receiving area of ​​a photovoltaic panel is:

[0077]

[0078] In the formula, This refers to the light-receiving area of ​​the photovoltaic panels in a photovoltaic module unit. Indicates the length of the photovoltaic panel; This indicates the width of the photovoltaic panel.

[0079] The photovoltaic panel area of ​​the photovoltaic module unit provided in step 102 is fixed. The output of the photovoltaic module unit can be adjusted by changing the light-receiving area of ​​the shading photovoltaic panel and the amount of solar radiation absorbed by the photovoltaic panel.

[0080] In step 103, the hydraulic system is controlled to perform a preset operation based on the light-receiving area.

[0081] In some embodiments, based on the light-collecting area determined in step 102, the servo system controls the hydraulic system to perform a preset operation so that the output of the photovoltaic module unit conforms to the output range of the photovoltaic equipment.

[0082] For example, the hydraulic system can be controlled to perform the following preset operations:

[0083] Based on the light-receiving area, the area of ​​the photovoltaic panel obscured by the transparent water tank can be obtained. Since the length of the transparent water tank and the length of the photovoltaic panel are the same, the expression for the area of ​​the photovoltaic panel not obscured by the transparent water tank can be:

[0084]

[0085] In the formula, This indicates the area of ​​the photovoltaic panels that are not obscured by the transparent water tank. This indicates the light-receiving area of ​​the photovoltaic panel that is blocked by the transparent water tank. This indicates the width of the photovoltaic panel obscured by the transparent water tank.

[0086] Based on the area of ​​the photovoltaic panel shielded by the transparent water tank, the amount of radiation absorbed by the photovoltaic module unit is changed by adjusting the area of ​​water in the transparent water tank, so that the output of the photovoltaic module unit matches the output range of the photovoltaic equipment.

[0087] Optionally, adjusting the water surface area in the transparent water tank can be achieved by using a servo system to transport water from the cold water storage tank to the transparent water tank through an inlet pipe.

[0088] Optionally, adjusting the water surface area in the transparent water tank can also be achieved by using a servo system to transport the water in the transparent water tank to the cold water storage tank through the water inlet pipe.

[0089] It should be noted that the servo system can change the water surface area in the transparent water tank in various ways, such as by receiving voltage signals to control the servo motor or by receiving current signals to control the servo motor. This application will not make any further limitations.

[0090] In some embodiments, the amount of solar radiation absorbed by the water in the transparent tank is related to the thickness of the water surface and the wavelength of the incident light, as can be seen from the Lambert-Beer law:

[0091]

[0092] In the formula, A represents absorbance. Indicates the intensity of incident light. Indicates the light transmission front. Molar absorptivity indicates the concentration of a substance at a given wavelength of monochromatic light, where 1 mol·L⁻¹ is the molar absorptivity. -1 The absorbance of the solution when the liquid thickness is 1 cm, expressed in L·mol⁻¹.-1 ·cm -1 ; The concentration of a substance is expressed in mol·L⁻¹. -1 , Indicates the thickness of the liquid layer.

[0093] Since the wavelength of sunlight is fixed, and the thickness and transmittance of the transparent water tank are also fixed, the amount of solar radiation attenuated per unit area of ​​water is also fixed. Therefore, the expression for the output of the photovoltaic module unit after the area of ​​the photovoltaic panel blocked by the transparent water tank can be:

[0094]

[0095] In the formula, This represents the attenuation coefficient of solar radiation after passing through a unit area of ​​water. It is the height of the water level in the transparent water tank. This indicates the light-receiving area of ​​the photovoltaic panel. This indicates the output power of the photovoltaic module unit that directly receives solar radiation; This indicates the surface area of ​​the water in a transparent water tank. This represents the output of solar radiation received by the photovoltaic module unit after being attenuated by the transparent water tank.

[0096] This application provides a photovoltaic (PV) equipment output control method. Based on the PV equipment output range received from the power grid system, a servo system controls a hydraulic system to execute preset actions, thereby changing the amount of solar radiation absorbed by the PV panels in the PV module unit, so that the output of the PV module unit conforms to the PV equipment output range. This not only suppresses the fluctuation impact of PV equipment connection on the power grid system, but also reduces the manufacturing cost of PV equipment by replacing lithium batteries as energy storage units with the hydraulic system of the PV regulation unit.

[0097] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0098] This application also provides a servo system, see [link to relevant documentation]. Figure 4 The servo system 300 may include at least one processor 310 and a memory 320, wherein the memory 320 stores a computer program 321 that can run on the at least one processor 310, and the processor 310 executes the computer program 321 to implement the steps in any of the above method embodiments, for example... Figure 3 Steps 101 to 103 in the illustrated embodiment.

[0099] For example, computer program 321 may be divided into one or more modules / units, one or more of which are stored in memory 320 and executed by processor 310 to complete this application. The one or more modules / units may be a series of computer program segments capable of performing specific functions, which describe the execution process of the computer program in server system 300.

[0100] Those skilled in the art will understand that Figure 4 This is merely an example of a servo system and does not constitute a limitation on servo systems. It may include more or fewer components than shown, or combine certain components, or different components, such as input / output devices, network access devices, buses, etc.

[0101] The processor 310 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0102] The memory 320 can be an internal storage unit of the servo system or an external storage device, such as a plug-in hard drive, a smart media card (SMC), a secure digital card (SD), or a flash card. The memory 320 is used to store the computer program and other programs and data required by the servo system. The memory 320 can also be used to temporarily store data that has been output or will be output.

[0103] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0104] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps in the various embodiments of the photovoltaic equipment output control method described above.

[0105] This application provides a computer program product that, when run on a servo system, enables the servo system to implement the steps in the various embodiments of the photovoltaic equipment output control method described above.

[0106] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0107] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A photovoltaic plant output control system, characterized by, include: Voltage fluctuation monitoring unit, photovoltaic output regulation unit, and photovoltaic module unit; The voltage fluctuation monitoring unit is used to determine the output range of the photovoltaic equipment based on the allowable voltage fluctuation value of the power grid and the characteristics of the photovoltaic equipment. The photovoltaic output adjustment unit is used to adjust the output of the photovoltaic module unit to conform to the output range of the photovoltaic equipment; The photovoltaic module unit transmits electrical energy to the power grid based on the adjustment result of the photovoltaic output adjustment unit; The photovoltaic output adjustment unit includes a hydraulic system and a servo system; The servo system receives the output range of the photovoltaic equipment, determines the light-collecting area of ​​the photovoltaic panel in the photovoltaic module unit based on the output range of the photovoltaic equipment, and controls the hydraulic system to perform preset operations based on the light-collecting area so that the output of the photovoltaic module unit conforms to the output range of the photovoltaic equipment. The hydraulic system includes a cold water storage tank, a hot water storage tank, an inlet pipe, an outlet pipe, and multiple transparent water tanks; The cold water storage tank is connected to the inlet pipe, the hot water storage tank is connected to the outlet pipe, and the inlet and outlet pipes are connected through a transparent water tank. The cold water storage tank is used to store cold water from the water supply system, and the hot water storage tank is used to store hot water after being exposed to sunlight. The transparent water tank receives cold water from the cold water storage tank through the inlet pipe and delivers the hot water heated by sunlight to the hot water storage tank through the outlet pipe. The transparent water tank is located above the photovoltaic panel in the photovoltaic module unit. The length of the transparent water tank is the same as the length of the photovoltaic panel in the photovoltaic module unit. The transparent water tank adopts a layered partition design. The servo system controls the hydraulic system to perform preset operations based on the light-collecting area, including: Based on the aforementioned light-receiving area, the area of ​​the photovoltaic panel obscured by the transparent water tank is obtained; Based on the area of ​​the photovoltaic panel obscured by the transparent water tank, water from the cold water storage tank is transported to the transparent water tank via an inlet pipe, or water from the transparent water tank is transported to the cold water storage tank via an inlet pipe. By adjusting the area of ​​the water in the transparent water tank, the amount of solar radiation absorbed by the photovoltaic module unit is changed, so that the output of the photovoltaic module unit matches the output range of the photovoltaic equipment.

2. The photovoltaic plant output control system of claim 1, wherein The hydraulic system also includes a temperature control switch, which senses the temperature of the hot water in the transparent water tank. When the temperature of the hot water in the transparent water tank reaches the preset temperature threshold of the temperature control switch, the valve of the temperature control switch opens, and the hot water flows into the hot water storage tank through the outlet pipe.

3. A photovoltaic power generation output control method employing the photovoltaic power generation output control system according to claim 1, characterized by, A servo system applied to a photovoltaic power output regulation unit, wherein the photovoltaic equipment output control method includes: The range of power received from photovoltaic equipment; Based on the output range of the photovoltaic equipment, the light-receiving area of ​​the photovoltaic panel in the photovoltaic module unit is determined; Based on the light-collecting area, the hydraulic system is controlled to perform preset operations so that the output of the photovoltaic module unit matches the output range of the photovoltaic equipment. The output of the photovoltaic module unit conforms to the output range of the photovoltaic equipment, including: The output range of the photovoltaic equipment is determined based on the allowable voltage fluctuations of the power grid and the characteristics of the photovoltaic equipment. The output power of the photovoltaic module unit is determined by the amount of solar radiation and the light-receiving area of ​​the photovoltaic panels in the photovoltaic module unit. The expression for the output power of the photovoltaic module unit is as follows: In the formula, This indicates the amount of solar radiation. This indicates the actual light-receiving area of ​​the photovoltaic panel. This indicates the efficiency of a photovoltaic module in converting solar radiation. This indicates the efficiency with which photovoltaic modules convert solar radiation into electrical energy.

4. The photovoltaic equipment output control method as described in claim 3, characterized in that, include: Determining the light-receiving area of ​​the photovoltaic panel in the photovoltaic module unit based on the output range of the photovoltaic equipment includes: Based on the expression that the output of the photovoltaic module unit conforms to the output range of the photovoltaic equipment, the light-receiving area of ​​the photovoltaic panel in the photovoltaic module unit is determined; wherein, the expression for the maximum light-receiving area of ​​the photovoltaic panel is: In the formula, Indicates the length of the photovoltaic panel; This indicates the width of the photovoltaic panel.

5. The photovoltaic equipment output control method as described in claim 4, characterized in that, Based on the light-collecting area, controlling the servo system to cause the hydraulic system to perform preset operations includes: Based on the aforementioned light-receiving area, the area of ​​the photovoltaic panel not obstructed by the transparent water tank is obtained. The expression for the area of ​​the photovoltaic panel not obstructed by the transparent water tank is as follows: In the formula, This indicates the area of ​​the photovoltaic panels that are not obscured by the transparent water tank. This indicates the light-receiving area of ​​the photovoltaic panel that is blocked by the transparent water tank. This indicates the width of the photovoltaic panel obscured by the transparent water tank; Based on the area of ​​the photovoltaic panel obscured by the transparent water tank, the servo system transports water from the cold water storage tank to the transparent water tank via an inlet pipe, or transports water from the transparent water tank to the cold water storage tank via an inlet pipe. By adjusting the area of ​​the water in the transparent water tank, the amount of solar radiation absorbed by the photovoltaic module unit is changed, so that the output of the photovoltaic module unit matches the output range of the photovoltaic equipment. The expression for the output of the photovoltaic module unit after the photovoltaic panel area is obscured by the transparent water tank is: In the formula, This represents the attenuation coefficient of solar radiation after passing through a unit area of ​​water. It is the height of the water level in the transparent water tank.

6. A servo system comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that, When the processor executes the computer program, it implements the photovoltaic equipment output control method as described in any one of claims 3 to 5.

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