Adjusting system, adjusting method, computer equipment, storage medium and product

Abstract

The invention is suitable for the technical field of data processing, and provides an adjusting system, an adjusting method, computer equipment, a storage medium and a product, the adjusting system is used for adjusting the output power of a photovoltaic cell system, and the photovoltaic cell system comprises a plurality of groups of photovoltaic cell pack strings connected in parallel; the adjusting system comprises a control unit and a plurality of first voltage converters, each first voltage converter is used for being connected with a photovoltaic battery pack string in series, and the first voltage converter has a first state in bypass relative to the photovoltaic battery pack string and a second state in communication with the photovoltaic battery pack string; the control unit is connected with each first voltage converter; and the control unit is used for controlling the first voltage converter to be in a first state or a second state and controlling the first voltage converter to output compensation voltage to the photovoltaic battery pack strings, so that the output power of each photovoltaic battery pack string is corresponding target power.

Description

Technical Field

[0001] The present application belongs to the field of data processing technology, and in particular relates to an adjustment system, an adjustment method, a computer device, a storage medium and a product. Background Art

[0002] The output characteristics of photovoltaic cells have a nonlinear relationship with light intensity and temperature. In practical applications, due to changes in lighting conditions, the photovoltaic cell operates at different output voltages and output currents, and the energy conversion efficiency of the photovoltaic cell will change accordingly.

[0003] To achieve maximum power output from a photovoltaic array, the maximum power point (MPP) of the photovoltaic cells must be calculated by measuring the voltage and current of the photovoltaic array. This dynamic adjustment of the operating point maximizes the energy efficiency of the photovoltaic system, addresses power losses caused by varying illumination conditions and nonlinear cell characteristics, and achieves efficient energy conversion in the photovoltaic system.

[0004] Therefore, it is necessary to propose a control system and control method with high efficiency and low energy consumption to adjust the output power of photovoltaic cells to ensure that the photovoltaic cells operate at the maximum power point as much as possible. Summary of the Invention

[0005] The embodiments of the present application provide a regulation system, regulation method, computer equipment, storage medium and product, which can efficiently and energy-savingly regulate the output power of photovoltaic cells to ensure that the photovoltaic cells operate at the maximum power point as much as possible.

[0006] A first aspect of an embodiment of the present application provides a regulation system for regulating output power of a photovoltaic battery system, wherein the photovoltaic battery system includes a plurality of photovoltaic battery strings connected in parallel;

[0007] The regulation system includes a control unit and a plurality of first voltage converters, each of the first voltage converters is connected in series with a photovoltaic cell string, and the first voltage converter includes a first state of being in bypass relative to the photovoltaic cell string and a second state of being in communication with the photovoltaic cell string;

[0008] The control unit is connected to each of the first voltage converters;

[0009] The control unit is used to control the first voltage converter to be in the first state or the second state, and to control the first voltage converter to output a compensation voltage to the photovoltaic cell strings so that the output power of each photovoltaic cell string is the corresponding target power.

[0010] The regulation system in the embodiment of the present application can, with the help of the different states of the first voltage converter, on the basis of the determined output power corresponding to the entire photovoltaic cell system, use the first voltage converter in series with the photovoltaic cell string to apply a compensation voltage to a single photovoltaic cell string, thereby achieving local power adjustment of the single photovoltaic cell string, ensuring that different photovoltaic cell strings can each operate at or near their own maximum power point, and thus achieving the photovoltaic cell system as a whole at or near the maximum power point, effectively improving the power adjustment efficiency and maintaining low power adjustment energy consumption.

[0011] Optionally, the photovoltaic cell system further includes a power transmission branch;

[0012] The power transmission branch includes a second voltage converter connected in series and parallel with a plurality of photovoltaic cell groups through a busbar;

[0013] The control unit is used to control the second voltage converter to adjust the bus voltage on the bus so that the output power of the photovoltaic battery system is the target power.

[0014] This regulation system can first adjust the photovoltaic battery system as a whole to be at or near the maximum power point before performing individual power regulation on each photovoltaic battery string in the photovoltaic battery system, and then perform individual power regulation on each photovoltaic battery string on this basis, providing a hierarchical power adjustment function, improving the effectiveness and meticulousness of the power adjustment of the photovoltaic battery system, and improving the ultimate output power of the photovoltaic battery system.

[0015] Optionally, the second voltage converter is connected to a power grid, and the power grid is connected to each of the first voltage converters as a power source.

[0016] In this process, the power grid is directly used as the power source of each first voltage converter, eliminating the need for additional power source settings, reducing the introduction of unnecessary components, and saving energy consumption.

[0017] Optionally, the first voltage converters are connected to the same power source, or the first voltage converters are connected to different power sources respectively.

[0018] In this way, a variety of connection configuration relationships are provided, which is flexible and provides diverse application options.

[0019] Optionally, each of the first voltage converters is connected to a third voltage converter, and connected to the same power source through the third voltage converter.

[0020] The introduction of the third voltage converter can perform pre-uniform voltage conversion processing for each first voltage converter, thereby improving modulation processing efficiency and saving power consumption.

[0021] A second aspect of an embodiment of the present application provides an energy storage system, comprising a photovoltaic battery system and a regulation system as described above, wherein the photovoltaic battery system comprises a plurality of parallel photovoltaic battery strings; each photovoltaic battery string is connected in series with a first voltage converter.

[0022] In this energy storage system, the output power of the photovoltaic battery system is regulated by the aforementioned regulation system, and a compensation voltage is applied to a single photovoltaic battery string by using a first voltage converter connected in series with the photovoltaic battery string, thereby ensuring that different photovoltaic battery strings can each operate at or near their own maximum power point, thereby achieving the maximum possible operation of the photovoltaic battery system as a whole at or near the maximum power point, effectively improving the power regulation efficiency and maintaining low power regulation energy consumption.

[0023] A third aspect of the embodiments of the present application provides a regulation method, which is applied to a control unit in the regulation system as described in any of the preceding items. The regulation method includes:

[0024] Controlling the first voltage converter to be in an initial state to output the same initial voltage to the photovoltaic cell string; the initial state is the first state or the second state;

[0025] If it is determined that the output power of the photovoltaic battery system in the initial state reaches the target power, controlling the first voltage converter to be in a target state, the target state being the second state;

[0026] In the second state, the first voltage converter is controlled to output a compensation voltage to the photovoltaic cell strings based on the initial voltage, so that the output power of each photovoltaic cell string is a corresponding target power.

[0027] In this process, based on determining the target output power corresponding to the entire photovoltaic battery system, the power of individual photovoltaic battery strings is further adjusted to enable the individual photovoltaic battery strings to reach their respective maximum output power or close to the maximum output power, thereby promoting further optimization and adjustment of the overall output power of the photovoltaic battery system, improving the working efficiency of each photovoltaic string, improving the system efficiency of the entire photovoltaic battery system, and reducing power consumption.

[0028] Optionally, controlling the first voltage converter to be in an initial state to output the same initial voltage to the photovoltaic cell strings includes:

[0029] controlling the first voltage converter to be in the first state, wherein in the first state, the initial voltage output by the first voltage converter to the photovoltaic cell string is 0;

[0030] The first voltage converter is controlled to be in the second state, and in the second state, the first voltage converter outputs initial voltages of the same value and greater than 0 to the photovoltaic cell strings.

[0031] By controlling the first voltage converter, whether in the first state or the second state, to output the same initial voltage to the photovoltaic cell strings, unnecessary voltage deviation interference caused by the first voltage converter to each photovoltaic cell string is reduced. While meeting application requirements in different situations, it is ensured that reasonable numerical detection and effective judgment can be made on the overall output power of the photovoltaic cell system in subsequent steps.

[0032] Optionally, if the photovoltaic battery system further includes a power transmission branch, and the power transmission branch includes a second voltage converter connected in parallel with the plurality of photovoltaic battery strings via a bus, then after controlling the first voltage converter to be in an initial state and outputting the same initial voltage to the photovoltaic battery strings, the method further includes:

[0033] The second voltage converter is controlled to adjust the bus voltage on the bus so that the output power of the photovoltaic battery system in the initial state reaches the target power.

[0034] In this case, when the first voltage converter is in the initial state, the output power of the photovoltaic battery system is regulated by actively regulating the bus voltage. The output power of the photovoltaic battery system as a whole is regulated in advance, so that the photovoltaic battery system as a whole reaches an ideal output power without intervention from the regulation system.

[0035] Optionally, controlling the second voltage converter to adjust the bus voltage on the bus so that the output power of the photovoltaic battery system in the initial state reaches a target power includes:

[0036] Outputting a control signal to the second voltage converter to adjust the bus voltage on the bus and obtain the output power of the photovoltaic battery system under different bus voltages;

[0037] When a first output power reaches a target power in the output power, the second voltage converter is controlled according to a target control signal corresponding to the first output power, so that the output power of the photovoltaic battery system in the initial state maintains the target power.

[0038] This process uses real-time modulation of the bus voltage and real-time collection of the corresponding output power to effectively determine whether the output power of the entire photovoltaic battery system has reached the target power, and then uses a control signal corresponding to the target power to control the operation of the second voltage converter, so that the bus voltage is maintained at the output voltage corresponding to the target power, and the output power of the photovoltaic battery system is maintained at the target power, so that the entire photovoltaic battery system reaches an ideal output power without intervention from the regulation system, thereby improving power control efficiency and control effectiveness.

[0039] Optionally, outputting a control signal to the second voltage converter to adjust the bus voltage on the bus and obtaining the output power of the photovoltaic battery system under different bus voltages includes:

[0040] outputting control signals to the second voltage converter in sequence to gradually adjust the bus voltage on the bus;

[0041] If the output power of the photovoltaic battery system at the adjusted bus voltage remains unchanged or decreases, determining that the output power of the photovoltaic battery system at the bus voltage before adjustment is the first output power that reaches the target power;

[0042] If the output power of the photovoltaic battery system increases under the adjusted bus voltage, the step of sequentially outputting control signals to the second voltage converter to gradually adjust the bus voltage on the bus is returned to, until the output power of the photovoltaic battery system remains unchanged or decreases under the adjusted bus voltage.

[0043] In an embodiment of the present application, the output control signal adjusts the bus voltage on the bus in a progressive manner, and obtains the corresponding output power during the continuous voltage progressive adjustment process. Based on the changing trend of the output power during the voltage progressive adjustment process, the first output power of the photovoltaic cell system to reach the target power in the first state is found, thereby improving the power adjustment efficiency and accuracy.

[0044] Optionally, in the second state, controlling the first voltage converter to output a compensation voltage to the photovoltaic cell strings based on the initial voltage so that the output power of each photovoltaic cell string reaches a corresponding target power includes:

[0045] In the second state, controlling the first voltage converter to sequentially output the gradually adjusted compensation voltage to the corresponding photovoltaic cell string based on the initial voltage;

[0046] If the output power of the photovoltaic cell string remains unchanged or decreases under the adjusted compensation voltage, controlling the first voltage converter to keep outputting the compensation voltage before adjustment to the corresponding photovoltaic cell string;

[0047] If the output power of the photovoltaic cell string increases under the adjusted compensation voltage, the step of controlling the first voltage converter to output the gradually adjusted compensation voltage to the corresponding photovoltaic cell string based on the initial voltage is returned to execution until the output power of the photovoltaic cell string remains unchanged or decreases under the adjusted compensation voltage.

[0048] In this process, when the first voltage converter is in the second state, the first voltage converter outputs a compensation voltage in a progressive manner to adjust the local power of a single photovoltaic cell string, and obtains the output power corresponding to the single photovoltaic cell string during the continuous voltage progressive adjustment process. Based on the changing trend of the output power during the voltage progressive adjustment process, the compensation voltage for the photovoltaic cell string to reach the target power in the second state is found, and the photovoltaic cell string is continuously adjusted with the compensation voltage to improve the power adjustment efficiency and accuracy.

[0049] The fourth aspect of an embodiment of the present application provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method described in the third aspect when executing the computer program.

[0050] A fifth aspect of an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the steps of the method described in the third aspect.

[0051] The sixth aspect of the present application provides a computer program product, including a computer-readable code, or a non-volatile computer-readable storage medium carrying the computer-readable code. When the computer-readable code is run in an electronic device, the processor in the electronic device executes the steps in the method described in the third aspect above.

[0052] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0054] Figure 1It is a connection structure between the regulating system and the photovoltaic cell system in some embodiments of the present application;

[0055] Figure 2 This is another connection structure between the regulating system and the photovoltaic cell system in some embodiments of the present application;

[0056] Figure 3 It is another connection structure between the regulating system and the photovoltaic cell system in some embodiments of the present application;

[0057] Figure 4 This is another connection structure between the regulating system and the photovoltaic cell system in some embodiments of the present application;

[0058] Figure 5 is a flow chart of the adjustment method of some embodiments of the present application;

[0059] Figure 6 is a flow chart of the adjustment method of some embodiments of the present application;

[0060] Figure 7 The IV curves of photovoltaic panel power generation corresponding to different light conditions are shown in the figure;

[0061] Figure 8 is a flow chart of the adjustment method of some embodiments of the present application;

[0062] Figure 9 It is a structural diagram of the computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0063] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0065] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0066] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0067] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0068] Photovoltaic cells in photovoltaic power generation systems generate electricity based on conditions such as light intensity and temperature. The output characteristics of photovoltaic cells have a nonlinear relationship with light intensity and temperature, and the output voltage and current of photovoltaic cells can vary significantly under different lighting conditions.

[0069] In practical applications, photovoltaic cells operate at different voltage and current points due to varying lighting conditions. MPPT (Maximum Power Point Tracking) technology measures the voltage and current of a photovoltaic array and uses a maximum power point tracking algorithm to calculate the maximum power point of the photovoltaic cells. It then drives the photovoltaic inverter to maintain operation at this power point.

[0070] The maximum power point (MPP) of a photovoltaic cell refers to the voltage and current combination that produces the maximum power under given lighting conditions. Under various lighting conditions, a maximum power point exists between the output power of a photovoltaic cell and its voltage and current. At this point, the photovoltaic cell achieves its highest energy conversion efficiency. The MPP is typically located at the peak of the IV curve (current-voltage characteristic curve).

[0071] By dynamically adjusting the working point, the energy utilization efficiency of the photovoltaic system can be maximized, the power loss problem caused by changes in lighting conditions and nonlinear battery characteristics in the photovoltaic system can be solved, and efficient energy conversion of the photovoltaic system can be achieved.

[0072] To ensure that photovoltaic cells operate at their maximum power point as much as possible, in some implementations, photovoltaic cells are organized into battery strings and parallel connections, and a corresponding DCDC converter is set in the power transmission branch of the photovoltaic string. The DCDC converter is used to implement a multi-channel MPPT function for the parallel battery strings.

[0073] However, since the DCDC converter is set on the power transmission branch of each photovoltaic string, the power passing through the DCDC converter is relatively large. It is necessary to use the DCDC converter to uniformly convert and transmit the power of all photovoltaic strings, which will result in an additional level of power transmission loss and low efficiency. This not only leads to serious efficiency loss, but also relatively high heat dissipation costs and high energy consumption. In addition, the power capacity and output voltage design range of the DCDC converter used in this way are relatively high, and the cost is also high.

[0074] Therefore, the present application proposes a regulation system and a regulation method, which can regulate the output power of photovoltaic cells in a highly efficient and low-energy manner, ensuring that the photovoltaic cells operate at the maximum power point as much as possible.

[0075] In order to illustrate the technical solution described in this application, specific embodiments are provided below.

[0076] Combine Figure 1 As shown, in some embodiments, a regulation system is provided, which is used to regulate the output power of a photovoltaic battery system, where the photovoltaic battery system includes multiple groups of photovoltaic battery strings connected in parallel.

[0077] The regulation system includes a control unit and a plurality of first voltage converters, each of which is used to be connected in series with a photovoltaic cell string. The first voltage converter includes a first state in which it is bypassed relative to the photovoltaic cell string and a second state in which it is connected to the photovoltaic cell string.

[0078] Among them, the control unit is connected to each first voltage converter; the control unit is used to control the first voltage converter to be in the first state or the second state, and control the first voltage converter to output a compensation voltage to the photovoltaic cell string so that the output power of each photovoltaic cell string is the corresponding target power.

[0079] Specifically, the target power is the maximum output power of the photovoltaic cell string or the output power whose deviation from the maximum output power is within a set range.

[0080] Optionally, the photovoltaic cell string specifically includes a plurality of photovoltaic cells connected in series. The number of the first voltage converters specifically matches the number of the photovoltaic cell strings or is greater than the number of the photovoltaic cell strings.

[0081] The first voltage converter is, for example, a DCDC converter, an ACDC converter, etc. Figure 1 The DC-DC converter is shown in Figure 1, which can achieve voltage conversion and modulation. Each voltage converter is connected to a power source to output a compensation voltage to the photovoltaic cell string. The first voltage converter has one end connected in series with the photovoltaic cell string and one end connected to the power source.

[0082] Optionally, the first voltage converters are connected to different power sources, such as Figure 1 Alternatively, combine Figure 2 As shown, the first voltage converter ( Figure 2 The DCDC (shown in Figure 2) is connected to the same power source, enabling power source sharing. This provides multiple connection configurations, providing flexibility and diverse application options.

[0083] Optionally, combined Figure 3 As shown, each first voltage converter is connected to a third voltage converter ( Figure 3 The first and second voltage converters (shown as a DC-DC converter connected to a power source) are connected to the same power source via a third voltage converter. The third voltage converter can be a DC-DC converter, an AC-AC converter, or an A-DC converter. The introduction of the third voltage converter allows for pre-conversion of the voltages of the first voltage converters, improving modulation efficiency and saving power.

[0084] The first voltage converter can be controlled by its own internal circuit to be in a conductive state in a series circuit with the photovoltaic cell string or in a bypass state relative to the photovoltaic cell string. Alternatively, the first voltage converter can be controlled by a switch on an external circuit to be in a conductive state in a series circuit with the photovoltaic cell string or in a bypass state relative to the photovoltaic cell string.

[0085] When the first voltage converter is in a bypass state relative to the photovoltaic cell string, the current photovoltaic cell string is normally connected in parallel with other photovoltaic cell strings, and the current bypasses the first voltage converter. The first voltage converter does not cause operational interference to the photovoltaic cell string.

[0086] The control unit may be, for example, an MPPT controller, or other circuit or control device having corresponding control functions. The control unit and the first voltage converter may be connected by communication or by circuit connection. This may be configured according to the specific form of the control unit and actual configuration requirements.

[0087] In the above regulation system, when the first voltage converter is in the first state, the first voltage converter connected to each photovoltaic cell string is in bypass relative to the photovoltaic cell string.

[0088] When the first voltage converter is in the bypass state, its output voltage is zero. In this case, the first voltage converter does not apply voltage interference to a single photovoltaic cell string. Multiple photovoltaic cell strings connected in parallel have output voltages and output currents. This output voltage is the bus voltage, and the output power of the photovoltaic cell system can be determined based on the bus voltage and output current.

[0089] When the first voltage converter is in the second state, the first voltage converter connected to each photovoltaic cell string is connected in series with the photovoltaic cell string. In this case, the first voltage converter connected to each photovoltaic cell string can output a non-zero initial voltage, such as 5V, to the photovoltaic cell string. Each first voltage converter can be controlled to output the same initial voltage value to the corresponding photovoltaic cell string. In this case, the output power of the photovoltaic cell system can be determined based on the bus voltage and output current.

[0090] When the first voltage converter is in the second state, the first voltage converter connected to each photovoltaic cell string can also output the required compensation voltage to the photovoltaic cell string to further adjust the output power of the determined photovoltaic cell system.

[0091] Correspondingly, in an optional specific control logic, the control unit can specifically control the first voltage converter switched from the first state to the second state to output a compensation voltage to the photovoltaic cell string based on the output power of the photovoltaic cell system when the first voltage converter is in the first state, or the first voltage converter in the second state to output the same initial voltage to the photovoltaic cell string, and based on the output power of the photovoltaic cell system in this case, control the first voltage converter to output a compensation voltage to the photovoltaic cell string, so that each photovoltaic cell string operates at a target power point, that is, the output power of each photovoltaic cell string is the corresponding target power.

[0092] During application, since each photovoltaic cell string is connected in series with a first voltage converter, when controlling the first voltage converter to output a compensation voltage to the photovoltaic cell string, some of the first voltage converters can be controlled to output a compensation voltage to the corresponding photovoltaic cell string, and different first voltage converters can be controlled to output different compensation voltages to the corresponding photovoltaic cell strings. For photovoltaic cell strings with voltage deviations, the corresponding first voltage converter is controlled to apply a compensation voltage to the series end with the photovoltaic cell string, thereby disturbing the output power of the photovoltaic cell string, thereby realizing separate voltage compensation for a single photovoltaic cell string in the photovoltaic cell system, so that on the basis of determining the output power corresponding to the entire photovoltaic cell system, the power of the single photovoltaic cell string is further adjusted so that the single photovoltaic cell string reaches the maximum output power or is close to the maximum output power, thereby promoting the optimization adjustment of the output power of the entire photovoltaic cell system.

[0093] The power capacity and output voltage design range of these first voltage converters can meet the voltage deviation adjustment requirements of the photovoltaic cell strings, reducing system costs. In addition, the power passing through each first voltage converter is relatively small, and there is no need to convert and adjust the output power of all photovoltaic cell strings, thereby greatly improving efficiency.

[0094] Therefore, the regulation system in the embodiment of the present application can, with the help of the different states of the first voltage converter, on the basis of the determined output power corresponding to the entire photovoltaic cell system, use the first voltage converter connected in series with the photovoltaic cell string to apply a compensation voltage to a single photovoltaic cell string, thereby achieving local power adjustment of the single photovoltaic cell string, ensuring that different photovoltaic cell strings can each operate at or near their own maximum power point, and thereby achieving the photovoltaic cell system as a whole at or near the maximum power point, effectively improving the power adjustment efficiency and maintaining low power adjustment energy consumption.

[0095] In some optional embodiments, the overall output power of the photovoltaic battery system can be directly detected. On this basis, when the first voltage converter is in the second state, the local power adjustment of a single photovoltaic battery string is achieved through the compensation voltage of the first voltage converter.

[0096] Alternatively, in some optional embodiments, the control unit can intervene to initially regulate the output power of the photovoltaic battery system as a whole, to a target power level. This target power level can be the maximum output power of the photovoltaic battery system as a whole, or near the maximum output power level. Based on this target power level, when the first voltage converter is in the second state, the compensation voltage of the first voltage converter is used to adjust the local power of a single photovoltaic cell string, thereby achieving secondary regulation of the photovoltaic battery system's output power.

[0097] Correspondingly, in some optional specific control logics, the control unit is configured to control the photovoltaic battery system to operate at a first target power point, i.e., control the output power of the photovoltaic battery system to be the first target power. Thereafter, based on the first target power, while controlling the first voltage converter to be in a second state, the control unit controls the first voltage converter to output a compensation voltage to the photovoltaic battery strings, such that each photovoltaic battery string operates at a corresponding second target power point, i.e., the output power of each photovoltaic battery string is its corresponding target power.

[0098] Correspondingly, after the output power of each photovoltaic cell string is adjusted to its corresponding target power, the output power of the photovoltaic cell system changes from the first target power to the second target power, wherein the second target power is greater than or equal to the first target power.

[0099] The above processing method takes into account that the control unit's adjustment of the output power of the photovoltaic battery system is a compromise balance adjustment of the overall working state formed by all photovoltaic battery strings. There may be a situation where some or all photovoltaic battery strings are not working at or near their respective maximum power points. In this case, the photovoltaic battery system as a whole is first adjusted to be at or near the maximum power point, and then on this basis, the power of each individual photovoltaic battery string is individually regulated, so that each photovoltaic battery string that is not working at or near its own maximum power point is regulated to work at or near its own maximum power point, and the overall output power of the photovoltaic battery system is further adjusted to a larger output power, thereby improving the effectiveness and refinement of the power adjustment.

[0100] In a specific implementation process, the control unit controls the output power of the photovoltaic battery system to be the first target power, which can be achieved by adjusting the bus voltage.

[0101] In an alternative embodiment, in combination Figure 4 As shown, the photovoltaic battery system also includes a power transmission branch; the power transmission branch includes a second voltage converter ( Figure 4 shown as DCAC).

[0102] The control unit is used to control the second voltage converter to adjust the bus voltage on the bus so that the output power of the photovoltaic battery system is the target power.

[0103] That is, the bus voltage can be regulated by means of a second voltage converter on the power transmission branch of the photovoltaic cell system.

[0104] The power transmission branch is specifically a line that outputs the power generated by each photovoltaic cell string in the photovoltaic cell system to the load or the grid. The second voltage converter can be a DCAC converter with an integrated high-low conversion function for the DC voltage or a direct DCDC converter.

[0105] Optionally, combined Figure 4 As shown, the second voltage converter is connected to the grid, which is connected to each first voltage converter as a power source. Directly using the grid as the power source for each first voltage converter eliminates the need for additional power sources, reduces the introduction of unnecessary components, and saves energy.

[0106] In this case, the control unit can first control the second voltage converter to adjust the bus voltage on the bus, and change the output power of the photovoltaic battery system by modulating the output voltage of the photovoltaic battery system, so that the output power of the photovoltaic battery system is the target power (i.e., the first target power mentioned above).

[0107] More specifically, in order to make the output power of the photovoltaic battery system reach the target power, the control unit can calculate the output power of the photovoltaic battery system under different bus voltages, and control the second voltage converter according to the control signal when the output power reaches the target power, so that the output power of the photovoltaic battery system maintains the target power.

[0108] This regulation system can first adjust the photovoltaic battery system as a whole to be at or near the maximum power point before performing individual power regulation on each photovoltaic battery string in the photovoltaic battery system, and then perform individual power regulation on each photovoltaic battery string on this basis, providing a hierarchical power adjustment function, improving the effectiveness and meticulousness of the power adjustment of the photovoltaic battery system, and improving the ultimate output power of the photovoltaic battery system.

[0109] In some optional embodiments, the embodiment of the present application provides an energy storage system, including a photovoltaic cell system and a regulation system as described in any of the preceding items, the photovoltaic cell system including multiple groups of parallel photovoltaic cell strings; each photovoltaic cell string is connected in series with a first voltage converter.

[0110] In this energy storage system, the output power of the photovoltaic battery system is regulated by the aforementioned regulation system, and a compensation voltage is applied to a single photovoltaic battery string by using a first voltage converter connected in series with the photovoltaic battery string, thereby ensuring that different photovoltaic battery strings can each operate at or near their own maximum power point, thereby achieving the maximum possible operation of the photovoltaic battery system as a whole at or near the maximum power point, effectively improving the power regulation efficiency and maintaining low power regulation energy consumption.

[0111] The energy storage system provided in the embodiments of the present application can implement the various processes of the embodiments of the above-mentioned regulation system and can achieve the same technical effects. Therefore, the specific limitations in one or more energy storage system embodiments provided below can refer to the limitations on the data updating method above. To avoid repetition, they will not be repeated here.

[0112] The output power of a single photovoltaic cell string, or the output power of the entire photovoltaic cell system, can be obtained by measuring their corresponding output voltage and output current to calculate the output power. The maximum power point of each photovoltaic cell string or photovoltaic cell system can be calculated based on the maximum power point tracking algorithm, and the voltage converter can be driven to maintain operation at this power point. The method of dynamically adjusting the operating point can maximize the energy utilization efficiency of the photovoltaic cell system, solve the power loss problem caused by changes in lighting conditions and nonlinear battery characteristics in the photovoltaic system, and achieve efficient energy conversion in the photovoltaic system.

[0113] In some optional implementations, the present application also provides a method for adjusting the control unit in the adjustment system as described in any of the above items, in combination with Figure 5 As shown, the adjustment method includes:

[0114] Step 101: Control the first voltage converter to be in an initial state to output the same initial voltage to the photovoltaic cell string.

[0115] The initial state is the first state or the second state.

[0116] When the first voltage converter is in the first state, the first voltage converter is in a bypass state relative to the photovoltaic cell string, and does not cause any operational interference to the photovoltaic cell string.

[0117] When the first voltage converter is in the second state, the first voltage converter can output voltage to the photovoltaic cell string, generating power disturbance to the photovoltaic cell string.

[0118] In order to better implement the regulation of the output power of the photovoltaic battery system, it is necessary to first control the first voltage converter in the initial state to output the same initial voltage to the photovoltaic battery strings.

[0119] In an optional embodiment, the first voltage converter is controlled to be in a first state, in which the initial voltage output by the first voltage converter to the photovoltaic cell string is 0. Alternatively, the first voltage converter is controlled to be in a second state, in which the first voltage converter outputs the same initial voltage greater than 0 to the photovoltaic cell string.

[0120] That is, the initial voltage is, for example, 0, or another set voltage value. When the initial voltage is 0, the first voltage converter is in a first state and does not interfere with the photovoltaic cell string. When the initial voltage is not 0, the first voltage converter is in a second state and applies appropriate and uniform voltage modulation to the photovoltaic cell string.

[0121] By controlling the first voltage converter to output the same initial voltage to the photovoltaic cell strings, regardless of whether it is in the first or second state, the first voltage converter can reduce unnecessary voltage deviation interference on each photovoltaic cell string. While meeting the application requirements of different situations, it ensures that the overall output power of the photovoltaic cell system can be reasonably detected and effectively judged in subsequent steps.

[0122] Step 102 : If it is determined that the output power of the photovoltaic battery system in the initial state reaches the target power, the first voltage converter is controlled to be in the target state.

[0123] The target state is the second state.

[0124] Among them, the output power of the photovoltaic battery system in the initial state reaches the target power, which specifically means that the output power of the photovoltaic battery system in the initial state reaches the maximum power value in this state or reaches a deviation from the maximum power value in this state within a set range, or reaches other optional target power values.

[0125] The output power of the photovoltaic battery system in the initial state specifically depends on the output current and output voltage of the photovoltaic battery system in this state.

[0126] By changing the output voltage of the photovoltaic battery system, the output power of the photovoltaic battery system in the initial state can be adjusted to reach the target power. Alternatively, by changing the output current of the photovoltaic battery system, the output power of the photovoltaic battery system in the initial state can be adjusted to reach the target power.

[0127] The busbars of each parallel-connected photovoltaic cell string in the photovoltaic cell system reach a corresponding busbar voltage in association with the output power of the photovoltaic cell system. When the output power of the photovoltaic cell system in its initial state reaches the target power, the busbars of each parallel-connected photovoltaic cell string in the photovoltaic cell system reach a target voltage corresponding to the target power.

[0128] In this step, it is first necessary to determine whether the output power of the photovoltaic battery system in the initial state reaches the target power, and on this basis, control the first voltage converter to be continuously in the second state.

[0129] In the second state, the first voltage converter is connected to the series circuit of the photovoltaic cell string, and the first voltage converter is controlled to perform voltage modulation on the photovoltaic cell string.

[0130] Step 103 : in the second state, controlling the first voltage converter to output a compensation voltage to the photovoltaic cell strings based on the initial voltage, so that the output power of each photovoltaic cell string is the corresponding target power.

[0131] The target power of each photovoltaic cell string may specifically refer to the maximum power value of the photovoltaic cell string itself or a deviation from the maximum power value within a set range, or other optional target power values.

[0132] Correspondingly, after the output power of each photovoltaic cell string is adjusted to its corresponding target power, the output power of the photovoltaic cell system as a whole changes from the already achieved target power (first target power) to the target power achieved after adjustment (second target power). The second target power is greater than or equal to the first target power.

[0133] When controlling the first voltage converter to output the compensation voltage to the photovoltaic cell string, some of the first voltage converters can be controlled to output the compensation voltage to the corresponding photovoltaic cell string, and different first voltage converters can be controlled to output different compensation voltages (the compensation voltage can be negative) to the corresponding photovoltaic cell strings. The compensation voltage is specifically determined by increasing or decreasing the voltage value on the basis of the initial voltage, thereby realizing targeted voltage modulation processing of a single photovoltaic cell string in the photovoltaic cell system, so that on the basis of determining the target output power corresponding to the photovoltaic cell system as a whole, the power of the single photovoltaic cell string is further adjusted so that the single photovoltaic cell string reaches its corresponding maximum output power or is close to the maximum output power, thereby promoting further optimization and adjustment of the output power of the photovoltaic cell system as a whole, improving the working efficiency of each photovoltaic string, improving the system efficiency of the entire photovoltaic cell system, and reducing power consumption.

[0134] In an optional implementation process, when adjusting the output power of the photovoltaic battery system to reach the target power by changing the output voltage of the photovoltaic battery system, this can be achieved with the help of a power transmission branch in the photovoltaic battery system, which includes a second voltage converter connected in series and parallel with multiple groups of photovoltaic batteries through a bus.

[0135] Correspondingly, after step 101 controls the first voltage converter to be in an initial state to output the same initial voltage to the photovoltaic cell string, the method further includes:

[0136] The second voltage converter is controlled to adjust the bus voltage on the bus so that the output power of the photovoltaic battery system in the initial state reaches the target power.

[0137] In this case, when the first voltage converter is in the initial state, the output power of the photovoltaic battery system is regulated by actively regulating the bus voltage. The output power of the photovoltaic battery system as a whole is regulated in advance, so that the photovoltaic battery system as a whole reaches an ideal output power without intervention from the regulation system.

[0138] Controlling the second voltage converter to adjust the bus voltage may be changing the bus voltage with a random value or changing the bus voltage in a voltage value gradient manner.

[0139] Specifically, in an optional embodiment, when the first voltage converter is in the first state, controlling the second voltage converter to adjust the bus voltage on the bus so that the output power of the photovoltaic battery system in the initial state reaches the target power includes:

[0140] Output a control signal to the second voltage converter to adjust the bus voltage on the bus and obtain the output power of the photovoltaic battery system under different bus voltages; when a first output power reaches the target power in the output power, control the second voltage converter according to the target control signal corresponding to the first output power, so that the output power of the photovoltaic battery system in the initial state maintains the target power.

[0141] This process uses real-time modulation of the bus voltage and real-time collection of the corresponding output power to effectively determine whether the output power of the entire photovoltaic battery system has reached the target power, and then uses a control signal corresponding to the target power to control the operation of the second voltage converter, so that the bus voltage is maintained at the output voltage corresponding to the target power, and the output power of the photovoltaic battery system is maintained at the target power, so that the entire photovoltaic battery system reaches an ideal output power without intervention from the regulation system, thereby improving power control efficiency and control effectiveness.

[0142] In the process of changing the bus voltage in a voltage value progressive manner, as an optional implementation method, combined with Figure 6 As shown, in the aforementioned steps, outputting a control signal to the second voltage converter to adjust the bus voltage on the bus and obtaining the output power of the photovoltaic battery system under different bus voltages includes:

[0143] In step 201 , control signals are sequentially output to the second voltage converter to gradually adjust the bus voltage on the bus.

[0144] Step 202 : If the output power of the photovoltaic battery system at the adjusted bus voltage remains unchanged or decreases, then the output power of the photovoltaic battery system at the bus voltage before adjustment is determined to be the first output power that reaches the target power.

[0145] Step 203 : If the output power of the photovoltaic battery system increases under the adjusted bus voltage, the process returns to step 201 .

[0146] If it can be determined that the output power of the photovoltaic battery system remains unchanged or decreases under the adjusted bus voltage, step 202 is executed accordingly. If, after returning to step 201, it is determined that the output power of the photovoltaic battery system increases under the adjusted bus voltage, step 203 is executed accordingly, until it is determined that the output power of the photovoltaic battery system remains unchanged or decreases under the adjusted bus voltage, and the output power of the photovoltaic battery system under the bus voltage before adjustment is determined to be the first output power to achieve the target power.

[0147] In this process, different bus voltages on the bus are adjusted to increase or decrease.

[0148] In some cases, the output power of the photovoltaic battery system at a first bus voltage is obtained, and the output power at a subsequent bus voltage is sequentially obtained. When the output power of the photovoltaic battery system shows an upward trend, if the output power of the subsequent bus voltage is less than or equal to the output power of the first bus voltage, the output power of the first bus voltage is determined to be the first output power to achieve the target power.

[0149] When the output power of the photovoltaic battery system shows an upward trend, if the output power of the subsequent bus voltage is greater than the output power of the first bus voltage, the subsequent bus voltage is determined as the first bus voltage, and the steps of sequentially obtaining the output power under the subsequent bus voltage are returned to execute until the output power of the subsequent bus voltage is less than or equal to the output power of the first bus voltage, and the output power of the first bus voltage is determined to be the first output power to achieve the target power.

[0150] Combine Figure 7 As shown, Figure 7 The IV curves of photovoltaic panels under different light conditions are shown in the figure. From top to bottom, they are the light intensity of 1000w / m 2 , 800w / m 2 、600w / m 2 400w / m 2 , 200w / m 2 The corresponding IV curve. To ensure peak power generation for the photovoltaic panel, an appropriate voltage must be applied. The IV curve in the figure reaches its apex when the voltage is at an intermediate value (specifically, around 35V), and the power reaches its maximum at this apex. Before this apex, an increase in voltage causes an increase in power; after this apex, an increase in voltage causes a decrease in power. Based on the IV curve's trend and pattern, the bus voltage is varied in a stepwise manner, and the power at the inflection point is found to be the maximum power of the photovoltaic cell system.

[0151] In an embodiment of the present application, the output control signal adjusts the bus voltage on the bus in a progressive manner, and obtains the corresponding output power during the continuous voltage progressive adjustment process. Based on the changing trend of the output power during the voltage progressive adjustment process, the first output power of the photovoltaic cell system to reach the target power in the first state is found, thereby improving the power adjustment efficiency and accuracy.

[0152] As an optional implementation, combined with Figure 8 As shown, in the second state, step 103 controls the first voltage converter to output a compensation voltage to the photovoltaic cell string based on the initial voltage so that the output power of each photovoltaic cell string is the corresponding target power, including:

[0153] Step 301 : in a second state, controlling the first voltage converter to sequentially output the gradually adjusted compensation voltage to the corresponding photovoltaic cell string based on the initial voltage.

[0154] Step 302 : If the output power of the photovoltaic cell string remains unchanged or decreases under the adjusted compensation voltage, control the first voltage converter to keep outputting the pre-adjustment compensation voltage to the corresponding photovoltaic cell string.

[0155] Step 303 : If the output power of the photovoltaic cell string increases under the adjusted compensation voltage, the process returns to step 301 .

[0156] If it can be determined that the output power of the photovoltaic cell string remains unchanged or decreases under the adjusted compensation voltage, step 302 is executed accordingly. If, after returning to step 301, it is determined that the output power of the photovoltaic cell string increases under the adjusted compensation voltage, step 303 is executed accordingly. Until it is determined that the output power of the photovoltaic cell string remains unchanged or decreases under the adjusted compensation voltage, the first voltage converter is controlled to keep outputting the compensation voltage before adjustment to the corresponding photovoltaic cell string.

[0157] In this process, the compensation voltages sequentially outputted by the first voltage converter to the corresponding photovoltaic cell strings are controlled to increase or decrease in a stepwise manner.

[0158] In some cases, the output power of different photovoltaic cell strings when the bus voltage is the target voltage is obtained respectively, and the first voltage converter is controlled to output the gradually adjusted compensation voltage to the corresponding photovoltaic cell string in sequence. For each photovoltaic cell string, the output power of the current photovoltaic cell string at different compensation voltages is obtained in sequence. When the output power of the photovoltaic cell string shows an upward trend, if the output power at the first compensation voltage is less than or equal to the output power at the previous compensation voltage, it is determined that the current photovoltaic cell string reaches or is close to the maximum output power at the previous compensation voltage, and the first voltage converter is controlled to keep outputting the previous compensation voltage to the corresponding photovoltaic cell string.

[0159] Correspondingly, when the output power of the photovoltaic battery system shows an upward trend, if the output power at the first compensation voltage is greater than the output power at the previous compensation voltage, the process returns to executing the step of controlling the first voltage converter to sequentially output the gradually adjusted compensation voltage to the corresponding photovoltaic battery string until the output power at a certain compensation voltage is less than or equal to the output power at the previous compensation voltage. It is determined that the current photovoltaic battery string reaches or is close to the maximum output power at the previous compensation voltage, and the first voltage converter is controlled to keep outputting the previous compensation voltage to the corresponding photovoltaic battery string.

[0160] In this process, when the first voltage converter is in the second state, the first voltage converter outputs a compensation voltage in a progressive manner to adjust the local power of a single photovoltaic cell string, and obtains the output power corresponding to the single photovoltaic cell string during the continuous voltage progressive adjustment process. Based on the changing trend of the output power during the voltage progressive adjustment process, the compensation voltage for the photovoltaic cell string to reach the target power in the second state is found, and the photovoltaic cell string is continuously adjusted with the compensation voltage to improve the power adjustment efficiency and accuracy.

[0161] When the photovoltaic cell strings are continuously regulated with the compensation voltage, the output voltages of different photovoltaic cell strings are adjusted by adjusting the voltage of the series terminal of the first voltage converter and the photovoltaic cell strings, so that they operate at or near their respective maximum power points, thereby maximizing the working efficiency of each photovoltaic cell string.

[0162] Below, taking the case where the first voltage converter is a DCDC, the second voltage converter is an inverter, and the control unit is an MPPT controller as an example, the overall processing flow of the regulation system regulating the photovoltaic battery system is exemplified.

[0163] When the regulation system starts, each DCDC connected in series with the PV cell string operates at an initial voltage, which can be 0V or a preset voltage, such as 5V. When each DCDC is in bypass mode relative to the PV cell string, the initial voltage is 0V. When each DCDC is connected to the PV cell string, the initial voltage is not 0V.

[0164] Under this premise, the MPPT controller finds the maximum power point of the photovoltaic battery system and controls the inverter to operate at the maximum power point. Specifically, the specific process of finding the maximum power point of the photovoltaic battery system is as follows:

[0165] When the inverter starts running, it will be in the initial state. At this time, the output voltage and output current of the photovoltaic battery system are the initial values.

[0166] The MPPT controller periodically samples and measures the output voltage and current of the photovoltaic system. This data is used to calculate the current power of the entire photovoltaic system. Based on the collected output voltage and current data of the photovoltaic system, the MPPT controller calculates the power using the formula P = V * I, where P is power, V is voltage, and I is current.

[0167] The MPPT controller then gradually adjusts the inverter's operating point based on the power calculation results, changing the bus voltage to find the maximum power point of the photovoltaic battery system in its current state. Typically, the maximum power point is located at the apex of the photovoltaic cell's IV characteristic curve.

[0168] Specifically, the MPPT controller sends instructions to the inverter to adjust the operating point so that it is as close as possible to the maximum power point of the photovoltaic cell system. The adjustment of the operating point is usually achieved by controlling the operating variables of the inverter, such as voltage or current. After the inverter adjusts the operating point, the MPPT controller updates the sampled data and recalculates the power. The MPPT controller then further adjusts the operating point and iterates continuously until it reaches the maximum power point or near the maximum power point of the photovoltaic cell system. Once the MPPT controller determines the maximum power point, it sends the corresponding control signal to the inverter to maintain the photovoltaic cell system operating near the maximum power point.

[0169] Subsequently, based on the above, when the inverter finds the maximum power point, it gradually controls each DCDC to increase or decrease the voltage (which can be negative), and compares the output power of each photovoltaic cell string after voltage adjustment control with that before control. If it increases, modulation continues; if it decreases, the compensation voltage of the previous state is maintained, so that each photovoltaic cell string operates at the optimal power point.

[0170] In this process, the overall output power of the photovoltaic battery system is first adjusted to reach the target power, and then the power of individual photovoltaic battery strings is further adjusted to enable the individual photovoltaic battery strings to reach their respective maximum output power or close to the maximum output power, thereby promoting further optimization and adjustment of the overall output power of the photovoltaic battery system, improving the working efficiency of each photovoltaic string, improving the system efficiency of the entire photovoltaic battery system, and reducing power consumption.

[0171] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of the steps or stages in other steps.

[0172] In one embodiment, Figure 9 As shown, a computer device is provided. The computer device 9 of this embodiment includes: at least one processor 900 ( Figure 9 Only one is shown), a memory 901 and a computer program 902 stored in the memory 901 and executable on the at least one processor 900, wherein the processor 900 implements the steps of any of the above-mentioned method embodiments when executing the computer program 902.

[0173] The computer device 9 may be a desktop computer, a notebook computer, a palmtop computer or other computing device. The computer device 9 may include, but is not limited to, a processor 900 and a memory 901. Those skilled in the art will understand that Figure 9 This is merely an example of the computer device 9 and does not constitute a limitation on the computer device 9. The computer device 9 may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the computer device may also include input and output devices, network access devices, buses, etc.

[0174] The processor 900 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0175] The memory 901 can be an internal storage unit of the computer device 9, such as a hard disk or memory of the computer device 9. The memory 901 can also be an external storage device of the computer device 9, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. equipped on the computer device 9. Furthermore, the memory 901 can also include both an internal storage unit of the computer device 9 and an external storage device. The memory 901 is used to store the computer program and other programs and data required by the computer device. The memory 901 can also be used to temporarily store data that has been output or is about to be output.

[0176] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0177] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0178] Those skilled in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel 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.

[0179] In the embodiments provided in this application, it should be understood that the disclosed apparatus / computer equipment and methods can be implemented in other ways. For example, the apparatus / computer equipment embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of the apparatus or unit, which can be electrical, mechanical or other forms.

[0180] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0181] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0182] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor, it can implement the steps of the above-mentioned various method embodiments. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0183] The present application implements all or part of the processes in the above-mentioned embodiment methods, and may also be implemented through a computer program product. When the computer program product runs on a computer device, the computer device can implement the steps in the above-mentioned method embodiments when executing the computer program product.

[0184] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A regulating system, characterized in that: The regulation system is used to regulate the output power of a photovoltaic battery system, wherein the photovoltaic battery system includes a plurality of photovoltaic battery strings connected in parallel; The regulation system includes a control unit and a plurality of first voltage converters, each of the first voltage converters is connected in series with a photovoltaic cell string, and the first voltage converter includes a first state of being in bypass relative to the photovoltaic cell string and a second state of being in communication with the photovoltaic cell string; The control unit is connected to each of the first voltage converters; The control unit is used to control the first voltage converter to be in the first state or the second state, and to control the first voltage converter to output a compensation voltage to the photovoltaic cell strings so that the output power of each photovoltaic cell string is the corresponding target power.

2. The adjustment system according to claim 1, characterized in that The photovoltaic cell system further includes a power transmission branch; The power transmission branch includes a second voltage converter connected in series and parallel with a plurality of photovoltaic cell groups through a busbar; The control unit is used to control the second voltage converter to adjust the bus voltage on the bus so that the output power of the photovoltaic battery system is the target power.

3. The adjustment system according to claim 2, characterized in that The second voltage converter is connected to a power grid, and the power grid is connected to each of the first voltage converters as a power source.

4. The adjustment system according to claim 1 or 2, characterized in that: The first voltage converters are connected to the same power source, or the first voltage converters are connected to different power sources respectively.

5. The regulating system according to claim 1 or 2, characterized in that: Each of the first voltage converters is connected to a third voltage converter, and is connected to the same power source through the third voltage converter.

6. An energy storage system, characterized in that: A photovoltaic cell system and a regulating system according to any one of claims 1 to 5, wherein the photovoltaic cell system comprises a plurality of photovoltaic cell strings connected in parallel; Each of the photovoltaic cell strings is connected in series with a first voltage converter.

7. A method of regulation, characterized in that: A control unit applied to the regulating system according to any one of claims 1 to 5, wherein the regulating method comprises: Controlling the first voltage converter to be in an initial state to output the same initial voltage to the photovoltaic cell string; the initial state is the first state or the second state; If it is determined that the output power of the photovoltaic battery system in the initial state reaches the target power, controlling the first voltage converter to be in a target state, the target state being the second state; In the second state, the first voltage converter is controlled to output a compensation voltage to the photovoltaic cell strings based on the initial voltage, so that the output power of each photovoltaic cell string is a corresponding target power.

8. The adjustment method according to claim 7, characterized in that: The controlling the first voltage converter to be in an initial state to output the same initial voltage to the photovoltaic cell strings includes: controlling the first voltage converter to be in the first state, in which the initial voltage output by the first voltage converter to the photovoltaic cell string is 0; or, The first voltage converter is controlled to be in the second state, and in the second state, the first voltage converter outputs initial voltages of the same value and greater than 0 to the photovoltaic cell strings.

9. The adjustment method according to claim 8, characterized in that: If the photovoltaic battery system further includes a power transmission branch, and the power transmission branch includes a second voltage converter connected in parallel with a plurality of photovoltaic battery strings via a bus, then after controlling the first voltage converter to be in an initial state and outputting the same initial voltage to the photovoltaic battery strings, the method further includes: The second voltage converter is controlled to adjust the bus voltage on the bus so that the output power of the photovoltaic battery system in the initial state reaches the target power.

10. The adjustment method according to claim 9, characterized in that: The controlling the second voltage converter to adjust the bus voltage on the bus so that the output power of the photovoltaic battery system in the initial state reaches the target power includes: Outputting a control signal to the second voltage converter to adjust the bus voltage on the bus and obtain the output power of the photovoltaic battery system under different bus voltages; When a first output power reaches a target power in the output power, the second voltage converter is controlled according to a target control signal corresponding to the first output power, so that the output power of the photovoltaic battery system in the initial state maintains the target power.

11. The adjustment method according to claim 10, characterized in that: The output control signal is sent to the second voltage converter to adjust the bus voltage on the bus and obtain the output power of the photovoltaic battery system under different bus voltages, including: outputting control signals to the second voltage converter in sequence to gradually adjust the bus voltage on the bus; If the output power of the photovoltaic battery system at the adjusted bus voltage remains unchanged or decreases, determining that the output power of the photovoltaic battery system at the bus voltage before adjustment is the first output power that reaches the target power; If the output power of the photovoltaic battery system increases under the adjusted bus voltage, the step of sequentially outputting control signals to the second voltage converter to gradually adjust the bus voltage on the bus is returned to, until the output power of the photovoltaic battery system remains unchanged or decreases under the adjusted bus voltage.

12. The adjustment method according to any one of claims 7 to 11, characterized in that: In the second state, controlling the first voltage converter to output a compensation voltage to the photovoltaic cell strings based on the initial voltage so that the output power of each photovoltaic cell string is a corresponding target power includes: In the second state, controlling the first voltage converter to sequentially output the gradually adjusted compensation voltage to the corresponding photovoltaic cell string based on the initial voltage; If the output power of the photovoltaic cell string remains unchanged or decreases under the adjusted compensation voltage, controlling the first voltage converter to keep outputting the compensation voltage before adjustment to the corresponding photovoltaic cell string; If the output power of the photovoltaic cell string increases under the adjusted compensation voltage, the step of controlling the first voltage converter to output the gradually adjusted compensation voltage to the corresponding photovoltaic cell string based on the initial voltage is returned to execution until the output power of the photovoltaic cell string remains unchanged or decreases under the adjusted compensation voltage.

13. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 7 to 12 are implemented.

14. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 7 to 12 are implemented.

15. A computer program product, characterized in that The invention comprises a computer-readable code, or a non-volatile computer-readable storage medium carrying a computer-readable code, wherein when the computer-readable code is executed in an electronic device, a processor in the electronic device executes the steps of the method according to any one of claims 7 to 12.

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