CN116909173A

CN116909173A - Control method, device, equipment and storage medium of photovoltaic tracking bracket system

Info

Publication number: CN116909173A
Application number: CN202310851060.3A
Authority: CN
Inventors: 项云飞; 刘凤忠; 王俊; 夏登福; 蔡赫; 解小勇
Original assignee: Three Gorges Intelligent Engineering Co ltd; Renzhuo Intelligent Technology Co ltd
Current assignee: Three Gorges Intelligent Engineering Co ltd; Renzhuo Intelligent Technology Co ltd
Priority date: 2023-07-11
Filing date: 2023-07-11
Publication date: 2023-10-20

Abstract

The invention discloses a control method, a device, equipment and a computer readable storage medium of a photovoltaic tracking bracket system, wherein the method comprises the following steps: collecting output power data of a photovoltaic power supply assembly; comparing the output power data with historical output power data of the photovoltaic power supply assembly at the same time of the historical day to obtain a first judging result; analyzing the change rate of the output power data acquired in the last period of time along with the change of the output power data to obtain a second judging result; determining a third judgment result according to the first judgment result and the second judgment result which are dynamically obtained; and when the third judgment result obtained dynamically is that the power saving mode is judged to be started, controlling the photovoltaic tracking bracket system to enter the power saving mode. The invention provides a solution for accurately judging the time of the power saving mode of operation, thereby being beneficial to saving the power consumption of the photovoltaic tracking bracket system and prolonging the continuous working time of the photovoltaic tracking bracket system under the condition of guaranteeing the normal power generation capacity as much as possible.

Description

Control method, device, equipment and storage medium of photovoltaic tracking bracket system

Technical Field

The present invention relates to the field of photovoltaic technologies, and in particular, to a control method, apparatus, device, and computer readable storage medium for a photovoltaic tracking bracket system.

Background

The angle of a tracking bracket in the photovoltaic tracking bracket system can be adjusted through motor driving, so that a photovoltaic panel arranged on the tracking bracket can track the direction of sunlight, and solar energy is fully utilized to generate electricity. In the photovoltaic tracking bracket system, each tracking controller TCU (Tracker Controller Unit) is self-powered by a photovoltaic string in the photovoltaic system. The photovoltaic string of panels both provides energy input to the inverter and also powers the TCU, which in stand operation requires a relatively large current to be drawn from the string of photovoltaic panels, potentially affecting mppt tracking of the inverter, so the need for a small self-powered TCU separate from the string power supply arises. The self-power of the small assembly is that a small photovoltaic plate is added to independently supply power to the TCU, and the small photovoltaic plate is separated from the power generation of the inverter, namely the small assembly.

Because the generated energy of the photovoltaic module is lower in overcast and rainy weather, the electric quantity input to the configured standby battery is less, and the photovoltaic tracking bracket system stops running under the condition that the standby battery is not powered. Especially in the case of small component power supply, this situation is more likely to occur. The power consumption of the photovoltaic tracking bracket system can be saved by the power saving mode, but how to accurately determine the time of running the power saving mode is a problem to be solved at present.

Disclosure of Invention

The invention mainly aims to provide a control method, a control device, control equipment and a computer readable storage medium of a photovoltaic tracking bracket system, and aims to provide a solution for accurately judging the time of a power saving mode of operation, so that the power consumption of the photovoltaic tracking bracket system is saved under the condition of guaranteeing normal power generation as much as possible, and the continuous working time of the photovoltaic tracking bracket system is prolonged.

In order to achieve the above object, the present invention provides a control method of a photovoltaic tracking bracket system, which presets a photovoltaic power supply module for supplying power to the photovoltaic tracking bracket system, the control method of the photovoltaic tracking bracket system comprising the steps of:

dynamically acquiring output power data of the photovoltaic power supply assembly according to a preset acquisition frequency in a first preset detection period of the current day;

comparing the dynamically acquired output power data with historical output power data of the photovoltaic power supply assembly at the same time of a historical day according to a preset comparison frequency, and obtaining a first judgment result according to a comparison result;

analyzing the change rate of the output power data acquired in the last period of time along with the change of the output power data according to a preset analysis frequency, and obtaining a second judgment result according to an analysis result;

Determining a third judging result according to the first judging result and the second judging result which are dynamically obtained, wherein the first judging result, the second judging result and the third judging result are all results representing whether a power saving mode is started or not;

and when the third judgment result obtained dynamically is that the power saving mode is judged to be started, controlling the photovoltaic tracking bracket system to enter the power saving mode.

Optionally, the output power data acquired in the acquisition period corresponding to the preset acquisition frequency is a maximum output power value of the photovoltaic power supply assembly in the acquisition period, and the preset comparison frequency is the same as the preset acquisition frequency.

Optionally, the step of comparing the dynamically collected output power data with historical output power data of the photovoltaic power supply assembly at the same time of the historical day according to a preset comparison frequency, and obtaining a first determination result according to the comparison result includes:

comparing the maximum output power value acquired in the current acquisition period with a target value according to the preset comparison frequency, wherein the target value is obtained by multiplying a target average power value by a preset proportionality coefficient, the target average power value is an average value of target output power values of at least one historical day before the current day recorded in advance, and the target output power value of the historical day is an output power value recorded in a simultaneous period corresponding to the current acquisition period by the historical day;

If the maximum output power value acquired in the current acquisition period is smaller than the target value, increasing the duration corresponding to the current acquisition period on the basis of the first accumulated duration recorded currently so as to update the first accumulated duration;

and if the updated first accumulation time is longer than a first preset time, obtaining a first judging result for judging to start the power saving mode.

Optionally, the output power data collected in the collection period corresponding to the preset collection frequency is a maximum output power value of the photovoltaic power supply assembly in the collection period, the step of analyzing the change rate of the output power data collected in the last period of time along with time according to the preset analysis frequency and obtaining a second determination result according to the analysis result includes:

averaging the maximum output power values acquired in a plurality of acquisition periods in the current analysis period according to the preset analysis frequency to obtain an average power value corresponding to the current analysis period;

performing linear regression analysis on a target data set to obtain the change rate of each average power value along with the change of time, wherein the target data set comprises the average power value corresponding to the analysis period and the average power values corresponding to a plurality of adjacent analysis periods before the current analysis period;

If the change rate is smaller than a preset change threshold, increasing the duration corresponding to the current analysis period on the basis of the second accumulated duration recorded currently so as to update the second accumulated duration;

and if the updated second accumulation time is longer than a second preset time, obtaining a second judging result for judging to start the power saving mode.

Optionally, the step of determining a third decision result according to the first decision result and the second decision result obtained dynamically includes:

acquiring the first judging result and the second judging result in the current judging period according to a preset judging frequency;

and if the first judging result and the second judging result in the current judging period are both judging to start the power saving mode, obtaining a third judging result judging to start the power saving mode.

Optionally, the first preset detection period is a period from a sunrise time of the current day to a first target time after the sunrise time, and a third preset time is spaced between the first target time and the sunrise time, and the control method of the photovoltaic tracking bracket system further includes:

dynamically acquiring the maximum output power value of the photovoltaic power supply assembly in an acquisition period according to the preset acquisition frequency in a second preset detection period, wherein the second preset detection period is from the first target time to a second target time, and the second target time is when the photovoltaic assembly in the photovoltaic system rotates to a maximum inclination angle facing the sunset direction when the photovoltaic system operates in a normal mode;

And if the maximum output power values acquired in a plurality of continuous acquisition periods in the second preset detection period are smaller than a preset threshold value, controlling the photovoltaic tracking bracket system to enter a power saving mode.

under the condition that the duration of the target state is detected to not reach the fourth preset duration, a third judging result for judging the current mode is obtained, wherein one of the first judging result and the second judging result is used for judging the current mode, and the other is used for judging the state of starting the power saving mode;

and after the duration of the target state is detected to reach the fourth preset duration, a third judging result for judging the power saving mode is obtained.

Optionally, the step of controlling the photovoltaic tracking rack system to enter a power saving mode includes:

and adjusting the maximum inclination angle of the photovoltaic module in the photovoltaic system, which is inclined towards the sunrise direction, and the maximum inclination angle of the photovoltaic module in the sunset direction so as to control the photovoltaic tracking bracket system to enter a power saving mode, wherein at least one of the adjusted maximum inclination angle, which is inclined towards the sunrise direction, and the adjusted maximum inclination angle, which is inclined towards the sunset direction, is smaller than the maximum inclination angle in the normal mode.

Optionally, after the step of controlling the photovoltaic tracking bracket system to enter a power saving mode, the method further includes:

if an instruction for entering a normal mode from a power saving mode is detected, restoring the maximum inclination angle of the photovoltaic module, which is inclined in the sunrise direction, and the maximum inclination angle of the photovoltaic module, which is inclined in the sunset direction, to the maximum inclination angle in the normal mode;

acquiring a normal inclination angle of the photovoltaic module when the photovoltaic module operates according to the normal mode at the current moment;

and controlling the photovoltaic module to rotate to the normal inclination angle.

Optionally, the step of adjusting the maximum inclination angle of the photovoltaic module in the photovoltaic system to incline in the sunrise direction and the maximum inclination angle of the photovoltaic module to incline in the sunset direction to control the photovoltaic tracking bracket system to enter the power saving mode includes:

if the photovoltaic module is inclined towards the sunrise direction currently, detecting whether the current inclination angle of the photovoltaic module is larger than a preset power-saving maximum inclination angle, wherein the preset power-saving maximum inclination angle is smaller than a maximum inclination angle in a normal mode;

if the current inclination angle is larger than the preset power-saving maximum inclination angle, setting the current inclination angle as the maximum inclination angle of the photovoltaic module inclining towards the sunrise direction, and setting the preset power-saving maximum inclination angle as the maximum inclination angle of the photovoltaic module inclining towards the sunset direction;

If the current inclination angle is smaller than or equal to the preset power saving maximum inclination angle, setting the preset power saving maximum inclination angle as a maximum inclination angle of the photovoltaic module inclining towards the sunrise direction and a maximum inclination angle of the photovoltaic module inclining towards the sunset direction.

if the photovoltaic module is inclined towards the sunset direction, detecting whether the current inclination angle of the photovoltaic module is larger than a preset power-saving maximum inclination angle, wherein the preset power-saving maximum inclination angle is smaller than a maximum inclination angle in a normal mode;

if the current inclination angle is larger than the preset power-saving maximum inclination angle, setting the current inclination angle as the maximum inclination angle of the photovoltaic module inclined towards the sunset direction;

if the current inclination angle is smaller than or equal to the preset power saving maximum inclination angle, setting the preset power saving maximum inclination angle as the maximum inclination angle of the photovoltaic module in the sunset direction.

In order to achieve the above object, the present invention further provides a control device for a photovoltaic tracking bracket system, which presets a photovoltaic power supply module for supplying power to the photovoltaic tracking bracket system, the control device for the photovoltaic tracking bracket system includes:

The acquisition module is used for dynamically acquiring output power data of the photovoltaic power supply assembly according to a preset acquisition frequency in a first preset detection period of the current day;

the comparison module is used for comparing the dynamically acquired output power data with the historical output power data of the photovoltaic power supply assembly at the same time of the historical day according to a preset comparison frequency, and obtaining a first judgment result according to a comparison result;

the analysis module is used for analyzing the change rate of the output power data acquired in the last period of time along with the change of the time according to a preset analysis frequency and obtaining a second judgment result according to an analysis result;

the judging module is used for determining a third judging result according to the first judging result and the second judging result which are dynamically obtained, wherein the first judging result, the second judging result and the third judging result are all results representing whether a power saving mode is started or not;

and the control module is used for controlling the photovoltaic tracking bracket system to enter the power saving mode when the third judgment result obtained dynamically is that the power saving mode is judged to be started.

To achieve the above object, the present invention also provides a control apparatus of a photovoltaic tracking stand system, the control apparatus of the photovoltaic tracking stand system comprising: the system comprises a memory, a processor and a control program of the photovoltaic tracking bracket system, wherein the control program of the photovoltaic tracking bracket system is stored in the memory and can run on the processor, and the control program of the photovoltaic tracking bracket system realizes the steps of the control method of the photovoltaic tracking bracket system when being executed by the processor.

In addition, in order to achieve the above object, the present invention also proposes a computer-readable storage medium having stored thereon a control program of a photovoltaic tracking bracket system, which when executed by a processor, implements the steps of the control method of a photovoltaic tracking bracket system as described above.

In an embodiment of the invention, a control method, a device, equipment and a computer readable storage medium of a photovoltaic tracking bracket system are provided. The method comprises the following steps: dynamically acquiring output power data of the photovoltaic power supply assembly according to a preset acquisition frequency in a first preset detection period of the current day; comparing the dynamically acquired output power data with historical output power data of the photovoltaic power supply assembly at the same time of a historical day according to a preset comparison frequency, and obtaining a first judgment result according to the comparison result; analyzing the change rate of the output power data acquired in the last period of time along with the change of the time according to a preset analysis frequency, and obtaining a second judgment result according to an analysis result; determining a third judging result according to the first judging result and the second judging result which are dynamically obtained, wherein the first judging result, the second judging result and the third judging result are all results representing whether a power saving mode is started or not; and when the third judgment result obtained dynamically is that the power saving mode is judged to be started, controlling the photovoltaic tracking bracket system to enter the power saving mode.

In the embodiment of the invention, whether the power saving mode is started is judged by comparing the output power data of the current day with the output power data of the historical day at the same time, so that the characteristic that the output power data can express weather conditions is utilized, the weather conditions of the current day are measured by taking the output power data of the historical day as a reference, and further a first judging result of whether the power saving mode is started on the current day is obtained. By analyzing the change rate of the output power data in the current day for a period of time along with the change of time, a second judging result is obtained according to the analysis result, the characteristic that the output power of the photovoltaic power supply assembly has different change trends under the condition of good weather conditions and under the condition of bad weather conditions is utilized, the weather conditions on the current day are measured by utilizing the value of the change rate, and then the second judging result of whether the power saving mode is started on the current day is obtained. And determining a final third judging result by combining the first judging result and the second judging result, and controlling the photovoltaic tracking bracket system to enter the power saving mode when the third judging result is the judging start power saving mode, so that the condition of misjudgment caused by adopting a single judging method is avoided, and the judging result is more reliable and more accurate. Therefore, the embodiment of the invention realizes a solution capable of accurately judging the time of the power saving mode of operation, thereby being beneficial to saving the power consumption of the photovoltaic tracking bracket system and prolonging the continuous working time of the photovoltaic tracking bracket system under the condition of guaranteeing the normal power generation amount as much as possible.

Drawings

FIG. 1 is a schematic diagram of a hardware operating environment according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of a first embodiment of a control method of the photovoltaic tracking rack system of the present invention;

fig. 3 is a schematic functional block diagram of a control device of the photovoltaic tracking stand system according to a preferred embodiment of the present invention.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1, fig. 1 is a schematic device structure of a hardware running environment according to an embodiment of the present invention.

It should be noted that, in the control device of the photovoltaic tracking bracket system according to the embodiment of the present invention, the control device of the photovoltaic tracking bracket system may be a device such as a smart phone, a personal computer, a server, and the like, which is not particularly limited herein.

As shown in fig. 1, the control device of the photovoltaic tracking stand system may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.

It will be appreciated by those skilled in the art that the device structure shown in fig. 1 does not constitute a limitation of the control device of the photovoltaic tracking bracket system, and may include more or fewer components than shown, or may combine certain components, or may have a different arrangement of components.

As shown in fig. 1, an operating system, a network communication module, a user interface module, and a control program of the photovoltaic tracking stand system may be included in a memory 1005 as one type of computer storage medium. The operating system is a program that manages and controls the hardware and software resources of the device, supporting the control programs of the photovoltaic tracking rack system, as well as the execution of other software or programs. In the device shown in fig. 1, the user interface 1003 is mainly used for data communication with the client; the network interface 1004 is mainly used for establishing communication connection with a server; and the processor 1001 may be used to call a control program of the photovoltaic tracking stent system stored in the memory 1005 and execute a control method of the photovoltaic tracking stent system in the following embodiments.

Based on the above structure, various embodiments of a control method of a photovoltaic tracking stand system are presented.

Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of a control method of the photovoltaic tracking stand system of the present invention.

Embodiments of the present invention provide embodiments of a control method for a photovoltaic tracking rack system, it being noted that although a logic sequence is shown in the flow chart, in some cases the steps shown or described may be performed in a different order than that shown or described herein. In this embodiment, the execution body of the control method of the photovoltaic tracking bracket system may be a controller in the photovoltaic tracking bracket system, or may also be other devices, which is not limited in this embodiment, and for convenience of description, the execution body is omitted from description of each embodiment. In this embodiment, the control method of the photovoltaic tracking stand system includes:

step S10, dynamically acquiring output power data of the photovoltaic power supply assembly according to a preset acquisition frequency in a first preset detection period of the current day.

A photovoltaic module for supplying power to the photovoltaic tracking bracket system (hereinafter referred to as a photovoltaic power supply module, as a photovoltaic module distinguished from the photovoltaic system) may be provided in advance. The photovoltaic power supply component can be a photovoltaic component in a photovoltaic system, can also be a photovoltaic component which is independent of a photovoltaic array of the photovoltaic system and is specially used for supplying power to the photovoltaic tracking support system, and the independently arranged photovoltaic component which is specially used for supplying power to the photovoltaic tracking support system has smaller output power compared with the photovoltaic component in the photovoltaic system, so the photovoltaic power supply component can also be called as a small component for showing distinction, namely the small component can be arranged for supplying power to the photovoltaic support system.

A detection period indicating from which time to which time of day a detection of whether to turn on the power saving mode is performed may be set in advance, hereinafter referred to as a first preset detection period to show distinction.

The preset acquisition frequency may be preset as needed, and is not limited in this embodiment, and is set to be acquired every 1 second, for example.

The output power data may be data related to output power, such as a maximum output power value or an average output power value, of the photovoltaic power supply assembly in an acquisition period corresponding to the preset acquisition frequency, which is not limited in this embodiment.

And step S20, comparing the dynamically acquired output power data with the historical output power data of the photovoltaic power supply assembly at the same time of the historical day according to a preset comparison frequency, and obtaining a first judgment result according to a comparison result.

The preset comparison frequency may be preset as needed, and is not limited in this embodiment, and may be set to compare every 1 second, for example.

The historical day refers to a day before the current day, in a possible implementation, the historical day may be selected to be the same as or similar to the sunrise time of the current day and have a good weather state, and may be selected to be a plurality of historical days. Output power data of the photovoltaic power module at various time points or various time periods of the history day (hereinafter referred to as history output power data to show distinction because of history) may be collected in advance, and the history output power data may be data related to output power, such as a maximum output power value or an average output power value during a time period, etc., and is not limited in this embodiment.

In a possible implementation manner, when the sun rises to the time of rising for T hours, every T minutes, the average value of the obtained maximum input power is recorded into the internal storage, 60T/T data is stored every day, the data is stored for N days at maximum, then the data is circularly stored, the data is always stored for the last N days, and the data is used as historical reference data to provide a reference for judging the daily power saving mode. T, t and N may be preset as needed, and are not limited herein.

When the data comparison is performed according to the preset comparison frequency, the output power data collected in the current comparison period corresponding to the preset comparison frequency may be compared with the historical output power data of the same time as the historical day, or the output power data collected in the current comparison period corresponding to the preset comparison frequency and a period of time before the current comparison period may be compared with the historical output power data of the same time as the historical day, that is, in this embodiment, the data in how long the data is compared is, which is not limited, and may be set according to the needs.

It should be noted that, since the output power data of the historical day can represent whether the weather condition of the historical day is good or bad, the output power data of the current day and the output power data of the historical day are compared, so that the weather condition of the current day can be obtained, and further, a determination result of whether to start the power saving mode can be given according to the weather condition of the current day.

In a specific embodiment, the comparison rule may be preset, and the determination rule for obtaining the first determination result according to the comparison result may be preset, which is not limited in this embodiment.

And step S30, analyzing the change rate of the output power data acquired in the last period of time along with the change of the output power data according to a preset analysis frequency, and obtaining a second judgment result according to an analysis result.

In this embodiment, in addition to determining whether to turn on the power saving mode according to the comparison result of the output power data of the current day and the historical day, it is also determined whether to turn on the power saving mode according to the change rate of the output power data of the current day.

The preset analysis frequency may be set as needed in advance, and is not limited in this embodiment, and is set to be sequentially every 1 minute, for example.

When the rate of change analysis is performed according to the preset analysis frequency, the rate of change analysis may be performed on the output power data collected in the current analysis period corresponding to the preset analysis frequency, or the rate of change analysis may be performed on the output power data collected in the current analysis period corresponding to the preset comparison frequency and a period of time before the current analysis period, that is, in this embodiment, how long the data is analyzed is the data, which is not limited specifically, may be set according to the needs.

It should be noted that, since the output power of the photovoltaic power supply assembly has different variation trends under the condition of good weather conditions and under the condition of bad weather conditions, for example, the output power of the photovoltaic power supply assembly has an obvious trend of increasing under the condition of good weather conditions after sunrise and has no obvious variation under the condition of bad weather conditions, the variation rate of the output power data of the photovoltaic power supply assembly is analyzed, so that the weather conditions on the current day can be obtained, and then the judgment result of whether to start the power saving mode can be given according to the weather conditions on the current day.

Since the trend of the output power of the weather condition is obviously different between good and bad conditions in a period after sunrise, the output power of the photovoltaic power module will tend to be stable after a period after sunrise, and the trend of the output power of the weather condition is not significantly different between good and bad conditions, in a feasible embodiment, the first preset detection period may be set to be a first preset period between the sunrise time of the current day and a first target time after the sunrise time, and the first target time and the sunrise time are separated by a third preset period. The third preset duration may be set as required, and is not limited herein, and may be set, for example, to a time when the output power of the photovoltaic power supply module starts to be stable when the first target time is good in weather conditions.

In a specific embodiment, the analysis method and the determination rule for obtaining the second determination result according to the analysis result may be preset, which is not limited in this embodiment.

Step S40, determining a third decision result according to the first decision result and the second decision result that are dynamically obtained, where the first decision result, the second decision result and the third decision result are all results that characterize whether to turn on a power saving mode.

Since the data comparison is performed according to the preset comparison frequency, the first determination result is updated according to the preset comparison frequency, and similarly, the second determination result is updated according to the preset analysis result. In this embodiment, the current latest first determination result and the latest second determination result may be dynamically acquired, and the final determination result, that is, the third determination result, is determined by combining the two determination results. In a possible embodiment, a determination frequency (hereinafter referred to as a preset determination frequency) may be preset as needed, and a third determination result is obtained according to the first determination result and the second determination result according to the preset determination frequency, for example, the determination is performed every 1 second.

It can be appreciated that the first determination result, the second determination result, and the third determination result are all results that characterize whether the power saving mode is turned on.

In the present embodiment, the determination rule for determining the third determination result from the first determination result and the second determination result is not limited, and may be set in advance as needed. For example, when it is desired to save power as much as possible in a specific application scenario, it may be set such that when one of the first determination result and the second determination result is the determination to turn on the power saving mode, the determination result to determine to turn on the power saving mode is obtained.

In a possible embodiment, the step S40 includes:

step S401, acquiring the first determination result and the second determination result in the current determination period according to a preset determination frequency.

In step S402, if the first determination result and the second determination result in the current determination period are both determined to be in the power saving mode, a third determination result is obtained.

When it is desired to maintain normal power generation as much as possible in a specific application scenario, it may be set that when the latest first determination result and the latest second determination result in the current determination period obtained according to the preset determination frequency are both determination of the power saving mode to be turned on, a third determination result for determining that the power saving mode is turned on is obtained, so as to avoid the influence on the power generation caused by false triggering of entering the power saving mode when the determination is in a wrong manner.

In a possible embodiment, the step S40 includes:

step S403, when it is detected that the duration of the target state does not reach the fourth preset duration, obtaining a third determination result for determining to keep the current mode, where one of the target state is a state for determining to keep the current mode and the other is a state for determining to turn on the power saving mode;

step S404, after detecting that the duration of the target state reaches the fourth preset duration, obtaining a third determination result for determining to start the power saving mode.

The possible cases of the first, second, and third determination results may further include maintaining the current mode, that is, the possible cases of the first, second, and third determination results may each include: a decision to turn on the power saving mode, a decision to turn on the normal mode, and a decision to keep the current mode. Accordingly, the decision rule may be set to: when one of the first judging result and the second judging result is judged to be in the power saving mode and the other is judged to be in the normal mode, a third judging result for judging to keep the current mode can be obtained; when the first judging result and the second judging result are both judging to start the power saving mode, a third judging result for judging to start the power saving mode is obtained, and when the first judging result and the second judging result are both judging to start the normal mode, a third judging result for judging to start the normal mode is obtained; when one of the first judging result and the second judging result is judging to keep the current mode and the other is judging to start the normal mode, after detecting that the duration of the condition reaches a certain duration, obtaining a third judging result of judging to start the normal mode, and when the duration of the condition does not reach the duration, obtaining a third judging result of judging to keep the current mode; when one of the first judging result and the second judging result is judging to keep the current mode and the other is judging to start the power saving mode, after detecting that the duration of the condition reaches the fourth preset duration, obtaining a third judging result of judging to start the power saving mode, and when the duration of the condition does not reach the fourth preset duration, obtaining a third judging result of judging to keep the current mode. The fourth preset time period may be set as needed, and is not limited in this embodiment.

And step S50, when the third judgment result obtained dynamically is that the power saving mode is judged to be started, controlling the photovoltaic tracking bracket system to enter the power saving mode.

Because the first determination result and the second determination result are updated according to a certain frequency, the third determination result is updated according to a certain frequency, that is, the third determination result is dynamically changed, and when the third determination result is the determination of starting the power saving mode, the photovoltaic tracking bracket system can be controlled to enter the power saving mode.

In a possible implementation manner, when the third determination result is that the normal mode is determined to be started, the photovoltaic tracking bracket system can be controlled to enter the normal mode; when the third determination result is that it is determined that the current mode is maintained, the mode switching may not be performed.

In a specific embodiment, the mode operated at the end of the current day may be continued for the next day, for example, the current day is the power saving mode, and the power saving mode is operated for the next day, or the current day may be operated by default according to the normal mode, specifically, which rule may be selected according to needs, which is not limited in this embodiment.

In a possible embodiment, the control method of the photovoltaic tracking stand system further includes:

Step S60, dynamically collecting the maximum output power value of the photovoltaic power supply assembly in the collection period according to the preset collection frequency in a second preset detection period, wherein the second preset detection period is when the first target time starts to a second target time, and the second target time is when the photovoltaic assembly in the photovoltaic system rotates to the maximum inclination angle facing the sunset direction when the photovoltaic system operates in a normal mode.

And step S70, if the maximum output power values acquired in a plurality of continuous acquisition periods in the second preset detection period are smaller than a preset threshold value, controlling the photovoltaic tracking bracket system to enter a power saving mode.

Because the output power of the photovoltaic power supply assembly will tend to be stable after a period of time after sunrise, in this embodiment, a second preset detection period is set, and in the second preset detection period, whether to start the power saving mode is determined by directly adopting a threshold comparison mode, which is simple and effective.

The second preset detection period is set to be the time when the first target time is reached to the second target time, and the second target time is set to be the time when the photovoltaic module in the photovoltaic system rotates to the maximum inclination angle facing the sunset direction when the photovoltaic module in the photovoltaic system operates in the normal mode, so that when the photovoltaic module in the photovoltaic system has rotated to the maximum inclination angle facing the sunset direction, judgment of whether to start the power saving mode is not needed, and waste of equipment computing resources is avoided.

In this embodiment, whether to start the power saving mode is determined by comparing output power data of the current day with output power data of the historical day at the same time, so that the characteristic that the output power data can represent weather conditions is utilized, the weather conditions of the current day are measured by taking the output power data of the historical day as a reference, and a first determination result of whether to start the power saving mode on the current day is obtained. By analyzing the change rate of the output power data in the current day for a period of time along with the change of time, a second judging result is obtained according to the analysis result, the characteristic that the output power of the photovoltaic power supply assembly has different change trends under the condition of good weather conditions and under the condition of bad weather conditions is utilized, the weather conditions on the current day are measured by utilizing the value of the change rate, and then the second judging result of whether the power saving mode is started on the current day is obtained. And determining a final third judging result by combining the first judging result and the second judging result, and controlling the photovoltaic tracking bracket system to enter the power saving mode when the third judging result is the judging start power saving mode, so that the condition of misjudgment caused by adopting a single judging method is avoided, and the judging result is more reliable and more accurate. Therefore, the embodiment of the invention realizes a solution capable of accurately judging the time of the power saving mode of operation, thereby being beneficial to saving the power consumption of the photovoltaic tracking bracket system and prolonging the continuous working time of the photovoltaic tracking bracket system under the condition of guaranteeing the normal power generation amount as much as possible.

Based on the above-mentioned first embodiment, a second embodiment of the control method of the photovoltaic tracking bracket system of the present invention is proposed, in which the preset comparison frequency and the preset collection frequency may be set to be the same, for example, each time of 1 second. When the output power data is collected according to the preset collection frequency, the collected output power data can be the maximum output power value of the photovoltaic power supply assembly in a collection period, for example, in 1 second.

In a possible embodiment, the step S20 includes:

step S201, comparing the maximum output power value acquired in the current acquisition period with a target value according to the preset comparison frequency, where the target value is obtained by multiplying a target average power value by a preset scaling factor, the target average power value is an average value of target output power values of at least one historical day before the current day recorded in advance, and the target output power value of the historical day is an output power value recorded in a simultaneous period corresponding to the current acquisition period by the historical day.

The output power value recorded by the history day in the same period corresponding to the current acquisition period may be the maximum output power value or the average output power value in the period.

The preset scaling factor may be set as required, and is greater than 0 and less than 1, and in this embodiment, the preset scaling factor is not limited, and may be set to 0.5, for example.

Since the preset comparison frequency and the preset acquisition frequency are set to be the same, the current acquisition period is the current comparison period. For example, the maximum output power value acquired for the current 1 second (assuming that the 1 st second from 10 th point 10 on the current day) may be compared with a target value, which is obtained by multiplying a target average power value, which is an average value of target output power values of at least one history day recorded in advance, by a preset scaling factor, and the target output power value of the history day, which is an output power value recorded for the 1 st second from 10 th point 10 on the history day, may be the maximum output power value of the 1 st second from 10 th point 10 on the history day, or the average output power value within 11 th minute of 10 th point, once every second comparison.

Step S202, if the maximum output power value acquired in the current acquisition period is smaller than the target value, increasing the duration corresponding to the current acquisition period based on the first accumulation duration recorded currently, so as to update the first accumulation duration.

An accumulation period (hereinafter referred to as a first accumulation period) may be set in advance, initialized to 0, and updated according to the result of data comparison at each acquisition period.

If the maximum output power value acquired in the current acquisition period is smaller than the target value, it is indicated that the weather condition of the current day is not good according to the maximum output power value in the current acquisition period, and at this time, the duration corresponding to the current acquisition period can be increased on the basis of the first accumulation duration recorded currently, for example, 1 second is increased, so as to obtain the updated first accumulation duration.

In one possible implementation, if the maximum output power value acquired in the current acquisition period is greater than or equal to the target value, the first accumulated duration may be cleared.

In step S203, if the updated first accumulation period is longer than a first preset period, a first determination result for determining to start the power saving mode is obtained.

The first preset duration may be preset as needed, which is not limited herein. If the updated first accumulation time is longer than the first preset time, the state that the weather condition of the current day is poor is indicated to last for a period of time according to the power comparison, and at this time, a first judging result for judging that the power saving mode is started can be obtained.

In a possible implementation manner, if the updated first accumulated duration is less than or equal to the first preset duration, a first determination result for determining to keep the current mode may be obtained.

In a possible implementation manner, the target value is referred to as a first target value, the preset scaling factor is referred to as a first preset scaling factor, a second preset scaling factor is preset, the second preset scaling factor is smaller than 1 and larger than the first preset scaling factor, the result of multiplying the target average power value by the second preset scaling factor is referred to as a second target value, and a third accumulation duration may be set and initialized to 0. If the maximum output power value acquired in the current acquisition period is greater than the second target value, it is indicated that the weather condition of the current day is better according to the maximum output power value in the current acquisition period, and at this time, the duration corresponding to the current acquisition period can be increased on the basis of the third accumulation duration recorded currently, for example, by 1 second, so as to obtain the updated third accumulation duration. If the maximum output power value acquired in the current acquisition period is smaller than or equal to the second target value, the third accumulated duration can be cleared. If the updated third cumulative time length is greater than or equal to the first preset time length, the state that the weather condition of the current day is good is indicated to last for a period of time according to the power comparison, and at this time, a first judging result for judging that the normal mode is started can be obtained. If the updated third accumulated time length is smaller than or equal to the first preset time length, a first judging result for judging that the current mode is kept can be obtained.

In this embodiment, a feasible comparison rule is provided and a determination rule for obtaining a first determination result according to a comparison result is preset, so that an accurate determination result can be obtained according to a power comparison result of a current day and a historical day, thereby being beneficial to timely controlling the photovoltaic tracking bracket system to enter a power saving mode under the condition of bad weather conditions, saving power consumption and prolonging the continuous working time of the photovoltaic tracking bracket system under the condition of bad weather conditions.

Based on the first and/or second embodiments, a third embodiment of the control method of the photovoltaic tracking bracket system of the present invention is provided, in this embodiment, the step S30 includes:

step S301, averaging the maximum output power values acquired in the plurality of acquisition periods in the current analysis period according to the preset analysis frequency, to obtain an average power value corresponding to the current analysis period.

The output power data collected in the collection period corresponding to the preset collection frequency can be the maximum output power value of the photovoltaic power supply assembly in the collection period.

The preset acquisition frequency may be set faster than the preset analysis frequency, for example, the preset acquisition frequency may be set to 1 second once and the preset analysis frequency may be set to 1 minute once. Since the preset acquisition frequency is faster than the preset analysis frequency, one analysis period includes a plurality of acquisition periods. When analysis is performed according to a preset analysis frequency, the maximum output power values acquired in a plurality of acquisition periods in the current analysis period can be averaged to obtain an average power value corresponding to the current analysis period.

It will be appreciated that after a number of analysis cycles are performed at a predetermined analysis frequency, each analysis cycle will result in a corresponding average power value.

Step S302, performing linear regression analysis on a target data set to obtain the change rate of each average power value along with time change, wherein the target data set comprises the average power value corresponding to the analysis period and the average power values corresponding to a plurality of adjacent analysis periods before the analysis period.

The analysis of the change rate may be performed at the current analysis period and the average power values corresponding to a plurality of adjacent analysis periods before the current analysis period, for example, the average power values corresponding to 10 analysis periods including the current analysis period may be set as one target data group. And carrying out linear regression analysis on each average power value in the target data set to obtain the change rate of each average power value along with time change. In the present embodiment, the specific manner of linear regression analysis is not limited. For example, the slope s of the linear regression equation, that is, the rate of change of each average power value with time may be calculated with the average power value as the ordinate and the square of the sunrise time minutes as the abscissa.

Step S303, if the change rate is smaller than the preset change threshold, increasing the duration corresponding to the current analysis period based on the second currently recorded accumulated duration, so as to update the second accumulated duration.

An accumulation period (hereinafter referred to as a second accumulation period) may be set in advance, initialized to 0, and updated according to the result of data analysis performed in each analysis period.

The preset change threshold may be set empirically in advance, and is not limited in this embodiment. If the change rate is smaller than the preset change threshold, it is indicated that the weather condition of the current day is not good according to the change rate calculated in the current analysis period, and at this time, the duration corresponding to the current analysis period can be increased based on the second accumulation duration recorded currently, for example, by 1 minute, so as to obtain the updated second accumulation duration.

In a possible implementation manner, if the change rate is greater than or equal to the preset change threshold, the second accumulated duration of the current record may be cleared.

Step S304, if the updated second accumulation period is longer than a second preset period, obtaining a second determination result for determining to start the power saving mode.

The second preset duration may be preset as needed, which is not limited herein. If the updated second accumulation time period is longer than the second preset time period, the state that the weather condition of the current day is poor is indicated to last for a period of time according to the change rate, and at this time, a second judging result for judging that the power saving mode is started can be obtained.

In a possible implementation manner, if the updated second accumulated duration is less than or equal to the second preset duration, a second determination result for determining to keep the current mode may be obtained.

In a possible implementation manner, the preset change threshold is referred to as a first preset change threshold, and a second preset change threshold is preset, where the second preset change threshold is greater than the first preset change threshold, and a fourth cumulative duration may be set, and initialized to 0. If the calculated change rate of the current analysis period is greater than the second preset change threshold, it is indicated that the weather condition of the current day is better according to the calculated change rate of the current analysis period, and at this time, the duration corresponding to the current analysis period can be increased on the basis of the third accumulation duration recorded currently, for example, by 1 minute, so as to obtain the updated fourth accumulation duration. If the calculated change rate in the current analysis period is smaller than or equal to the second preset change threshold value, the fourth accumulated duration can be cleared. If the updated fourth cumulative time length is greater than or equal to the second preset time length, the state that the weather condition is good at the current day is shown to last for a period of time according to the change rate analysis, and at this time, a second judging result for judging that the normal mode is started can be obtained. If the updated fourth accumulated time length is smaller than or equal to the second preset time length, a second judging result for judging that the current mode is kept can be obtained.

In this embodiment, a feasible analysis method and a determination rule for obtaining a second determination result according to an analysis result are provided, and an accurate determination result can be obtained according to a change rate of output power, so that the photovoltaic tracking bracket system is controlled to enter a power saving mode in time under a condition of bad weather conditions, power consumption is saved, and a continuous working time of the photovoltaic tracking bracket system under the condition of bad weather conditions is prolonged.

Based on the first, second and/or third embodiments, a fourth embodiment of a control method of a photovoltaic tracking bracket system of the present invention is provided, where the step S50 includes:

step S501, adjusting a maximum inclination angle of the photovoltaic module in the photovoltaic system to incline in the sunrise direction and a maximum inclination angle of the photovoltaic module to incline in the sunset direction to control the photovoltaic tracking bracket system to enter a power saving mode, wherein at least one of the adjusted maximum inclination angle to incline in the sunrise direction and the adjusted maximum inclination angle to incline in the sunset direction is smaller than the maximum inclination angle in the normal mode.

In this embodiment, a feasible implementation of a power saving mode is provided, so as to reduce power consumption of the photovoltaic tracking bracket system in periods of lack of solar illumination in rainy days and the like, thereby increasing continuous working time of the photovoltaic tracking bracket system and avoiding probability of "lying down" of the photovoltaic tracking bracket system due to complete power failure of the battery.

It should be noted that, the scene effect of the power supply of the small component is better outstanding in this embodiment, because when the small component is powered, in overcast and rainy weather, the condition that the battery is dead easily appears, so the power saving requirement is more urgent, and the power saving mode of rejecting in this embodiment scheme can be better to the condition that the battery is dead easily when the overcast and rainy weather small component is powered, thereby increasing the continuous working time of the photovoltaic tracking bracket system.

In one day, by controlling the photovoltaic module to tilt toward the sunrise direction or the sunset direction to track the sun direction, in the normal mode, the angles of the photovoltaic module tilting toward the sunrise direction and the sunset direction have a maximum value, that is, a maximum inclination angle, and in general, the maximum inclination angles (values, without directions) of both sides are the same, for example, 45 degrees. The maximum inclination angles of the two sides may be different in a special case, and the power saving mode of the present embodiment is also applicable to this case, but the following description will take the case that the maximum inclination angles of the two sides are the same as an example.

In this embodiment, the specific adjustment procedure of the inclination angle of the photovoltaic module is not limited. For example, in one possible embodiment, the following adjustment procedure may be followed: the photovoltaic module is in a lying state before sunrise (namely after sunset of the previous day), the inclination angle at the moment is 0, the photovoltaic module is controlled to increase the inclination angle towards the sunrise direction according to a certain speed from the sunrise moment, the maximum inclination angle is reached after a period of time after sunrise, then the photovoltaic module is controlled to rotate backwards, in the process, the most suitable inclination angle of the photovoltaic module is calculated in real time according to the solar altitude, the calculated inclination angle is adjusted in real time, after the lying state is reached, the photovoltaic module is controlled to rotate towards the sunset direction according to the inclination angle calculated in real time until the maximum inclination angle is reached, and the photovoltaic module is controlled to rotate backwards according to a certain speed until the lying state is reached at the sunset moment. In other embodiments, the inclination angle of the photovoltaic module may also be adjusted according to other adjustment procedures.

The power saving effect can be achieved if at least one of the maximum inclination angle of the adjusted inclination in the sunrise direction and the maximum inclination angle of the adjusted inclination in the sunset direction is smaller than the maximum inclination angle in the normal mode.

For example, when the above-mentioned backward adjustment flow is adopted, it is assumed that the maximum inclination angle in the normal mode is 45 degrees, and the maximum inclination angle inclined toward the sunset direction is adjusted to be 5 degrees, then according to the power saving mode, 100 degrees will be operated in one day, 180 degrees will be operated in the normal mode, and assuming that the device for driving the photovoltaic module to rotate needs to consume 70% of power, the controller needs to consume 30% of power, then the power ratio in the power saving mode is 30% + (100/180) ×70% =68.9%, and the power saving ratio reaches 31.1%.

The maximum inclination angle of the adjusted inclination in the sunrise direction and the maximum inclination angle of the adjusted inclination in the sunset direction are smaller than those in the normal mode, so that power consumption can be saved to a greater extent. For example, when the above-mentioned backward adjustment flow is adopted, assuming that the maximum inclination angle in the normal mode is 45 degrees, the maximum inclination angle inclined toward the sunrise direction and the maximum inclination angle inclined toward the sunset direction are both 5 degrees after adjustment, then according to the power saving mode, 20 degrees will be operated in one day, and 180 degrees will be operated in the normal mode, and assuming that the device for driving the photovoltaic module to rotate needs to consume 70% of power, the controller needs to consume 30% of power, then the power ratio in the power saving mode is 30++ (20/180) ×70% =37.7%, and the power saving ratio reaches 62.3%.

It should be noted that, in overcast and rainy weather, the influence of the power saving mode on the generated energy is limited, because the lying state and the tracking generated power are not greatly different in overcast and rainy weather, the power saving mode provided in the embodiment can reduce the operation power consumption in overcast and rainy weather, and can realize the work in longer continuous overcast and rainy weather. In addition, since the power generation amount is not necessarily 0 in overcast and rainy weather, that is, the actual power generation amount is 0 or more, the actual node ratio is equal to or more than the calculated theoretical node ratio.

In a possible embodiment, after the step S50, the method further includes:

and step A10, if a command for entering a normal mode from a power saving mode is detected, restoring the maximum inclination angle of the photovoltaic module, which is inclined in the sunrise direction, and the maximum inclination angle of the photovoltaic module, which is inclined in the sunset direction, to the maximum inclination angle in the normal mode.

On the basis of the power saving mode for realizing power saving by limiting the maximum inclination angle, in the present embodiment, an embodiment of recovering from the power saving mode to the normal mode is further provided, so that the power generation amount of the photovoltaic module can be ensured when the recovery to the normal mode is required due to the change of sunny days and rainy days or other reasons.

The trigger condition of the instruction to enter the normal mode in the power saving mode is not limited in the present embodiment. For example, when the third determination result obtained dynamically is that the normal mode is determined to be turned on in the case of the power saving mode, an instruction to enter the normal mode from the power saving mode may be triggered.

In the power saving mode, at least one of the maximum inclination angle of the photovoltaic module inclining in the sunrise direction and the maximum inclination angle of the photovoltaic module inclining in the sunset direction is smaller than the maximum inclination angle in the normal mode, so in the embodiment, when the photovoltaic module is restored to the normal mode, the maximum inclination angle of the photovoltaic module inclining in the sunrise direction and the maximum inclination angle of the photovoltaic module inclining in the sunset direction are restored to the maximum inclination angle in the normal mode, and the photovoltaic module can track the sun normally.

And step A20, obtaining a normal inclination angle of the photovoltaic module when the photovoltaic module operates according to the normal mode at the current moment.

And step A30, controlling the photovoltaic module to rotate to the normal inclination angle.

Because the maximum inclination angle of the photovoltaic module is limited in the power saving mode, the inclination angle of the photovoltaic module may not conform to the most suitable inclination angle calculated according to the solar altitude angle in the normal mode. For example, when the photovoltaic module is limited by the maximum inclination angle in the power saving mode and is inclined by 5 degrees in the sunrise direction at the current moment, and when the photovoltaic module needs to be restored to the normal mode, according to the solar altitude at the current moment, the most suitable inclination angle at the current moment is calculated to be 30 degrees in the sunrise direction, the photovoltaic module is controlled to rotate by 25 degrees in the sunrise direction so as to reach the 30-degree position, and then the photovoltaic module is adjusted according to the inclination angle adjustment flow in the normal mode.

In a possible implementation manner, the step S501 includes:

step S5011, if the photovoltaic module is inclined towards the sunrise direction, detecting whether the current inclination angle of the photovoltaic module is larger than a preset power saving maximum inclination angle, wherein the preset power saving maximum inclination angle is smaller than a maximum inclination angle in a normal mode.

The preset power saving maximum inclination angle is a maximum inclination angle expected to be set in a preset power saving mode and is smaller than a maximum inclination angle in a normal mode. The photovoltaic module being inclined in the sunrise direction means that the photovoltaic module is inclined in the sunrise direction by an angle greater than 0, and this may be a process in which the photovoltaic module is rotated from a lying state to the sunrise direction, or a process in which the photovoltaic module is rotated from a maximum inclination angle position inclined in the sunrise direction to the lying state.

And step S5012, if the current inclination angle is larger than the preset power saving maximum inclination angle, setting the current inclination angle as the maximum inclination angle of the photovoltaic module inclining towards the sunrise direction, and setting the preset power saving maximum inclination angle as the maximum inclination angle of the photovoltaic module inclining towards the sunset direction.

If the current inclination angle of the photovoltaic module is larger than the preset power saving maximum inclination angle, the fact that the photovoltaic module is operated to exceed the expected maximum inclination angle in the power saving mode is indicated, and under the condition, the photovoltaic module can not rotate continuously in the sunrise direction any more, and the current inclination angle is used as the maximum inclination angle of the photovoltaic module which is inclined in the sunrise direction. And the stage of rotating to incline toward the sunset direction is not yet reached at present, the preset power saving maximum inclination angle can be set as the maximum inclination angle of the photovoltaic module inclining toward the sunset direction.

For example, when the above-described backward adjustment flow is adopted, assuming that the maximum inclination angle in the normal mode is 45 degrees, the preset power saving maximum inclination angle is 5 degrees, and when it is necessary to switch from the normal mode to the power saving mode, the photovoltaic module is inclined toward the sunrise direction, and the angle is 30 degrees, then 30 degrees may be set as the maximum inclination angle inclined toward the sunrise direction, and 5 degrees may be set as the maximum inclination angle inclined toward the sunset direction. Then, according to the power saving mode, 70 degrees will be operated in one day, 180 degrees will be operated in the normal mode, and assuming that the device driving the photovoltaic module to rotate needs to consume 70% of power and the controller needs to consume 30% of power, the power ratio in the power saving mode is 30++ (70/180) ×70+=57.2% and the power saving ratio reaches 42.8%.

Under the condition that the current inclination angle exceeds the expected maximum inclination angle in the power saving mode, the current inclination angle is taken as the maximum inclination angle, so that the situation that the inclination angle of the photovoltaic module is repeatedly and greatly adjusted in a scene with uncertain weather is avoided.

Step S5013, if the current inclination angle is less than or equal to the preset power saving maximum inclination angle, setting the preset power saving maximum inclination angle as a maximum inclination angle of the photovoltaic module inclining in the sunrise direction and a maximum inclination angle of the photovoltaic module inclining in the sunset direction.

If the current inclination angle of the photovoltaic module is smaller than or equal to the preset power saving maximum inclination angle, the photovoltaic module is not operated to exceed the expected maximum inclination angle in the power saving mode, and the preset power saving maximum inclination angle can be used as the maximum inclination angle of the photovoltaic module in the sun-out direction and the maximum inclination angle of the photovoltaic module in the sun-falling direction.

For example, when the above-described backward adjustment flow is adopted, assuming that the maximum inclination angle in the normal mode is 45 degrees, the preset power saving maximum inclination angle is 5 degrees, and when it is necessary to switch from the normal mode to the power saving mode, the photovoltaic module is inclined to the sunrise direction, and the angle is 5 degrees, then the 5 degrees may be set to the maximum inclination angle inclined to the sunrise direction and the maximum inclination angle inclined to the sunset direction. Then, according to the power saving mode, the device will run for 20 degrees in one day, the normal mode will run for 180 degrees, assuming that the device driving the photovoltaic module to rotate needs to consume 70% of power and the controller needs to consume 30% of power, the power ratio in the power saving mode is 30++ (20/180) ×70+=37.7% and the power saving ratio reaches 62.3%.

In a possible implementation manner, the step S501 includes:

and step S5014, if the photovoltaic module is inclined towards the sunset direction currently, detecting whether the current inclination angle of the photovoltaic module is larger than a preset power-saving maximum inclination angle, wherein the preset power-saving maximum inclination angle is smaller than the maximum inclination angle in the normal mode.

The photovoltaic module being inclined in the sunset direction means that the photovoltaic module is inclined in the sunset direction by an angle greater than 0, and this may be a process in which the photovoltaic module is rotated in the sunset direction from a lying state, or a process in which the photovoltaic module is rotated in the lying state from a maximum inclination angle position inclined in the sunset direction.

And step S5015, if the current inclination angle is larger than the preset power saving maximum inclination angle, setting the current inclination angle as the maximum inclination angle of the photovoltaic module in the sunset direction.

If the current inclination angle of the photovoltaic module is larger than the preset power saving maximum inclination angle, the fact that the photovoltaic module is operated to exceed the expected maximum inclination angle in the power saving mode is indicated, and under the condition, the photovoltaic module can not rotate continuously in the sunset direction any more, and the current inclination angle is used as the maximum inclination angle of the photovoltaic module which is inclined in the sunset direction. And the stage of rotating to incline towards the sunrise direction is completed at present, so that the inclination angle towards the sunrise direction does not need to be set.

Step S5016, if the current inclination angle is less than or equal to the preset power saving maximum inclination angle, setting the preset power saving maximum inclination angle as the maximum inclination angle of the photovoltaic module in the sunset direction.

If the current inclination angle of the photovoltaic module is smaller than or equal to the preset power saving maximum inclination angle, the fact that the photovoltaic module does not operate to exceed the expected maximum inclination angle in the power saving mode at this time is indicated, and in this case, the preset power saving maximum inclination angle can be used as the maximum inclination angle of the photovoltaic module to incline towards the sunset direction.

In a possible implementation manner, under the condition that the mode of continuing the previous day on the next day is set, if the current day is the power saving mode, the power saving mode is continuously operated on the next day, no matter how much the maximum inclination angle in the current day power saving mode is set, the maximum inclination angle of the photovoltaic module inclining towards the sunrise direction and the maximum inclination angle of the photovoltaic module inclining towards the sunset direction in the power saving mode are set as preset power saving maximum inclination angles at the beginning of the next day, so that the power consumption can be saved to the greatest extent at the beginning of the next day, and the continuous working time of the photovoltaic tracking bracket in bad weather condition is further prolonged; and when the normal mode is restored and then the power saving mode is entered again in the operation process in the next day, setting the maximum inclination angle according to the inclination angle when the power saving mode is entered.

In addition, an embodiment of the present invention further provides a control device of a photovoltaic tracking bracket system, referring to fig. 3, where the control device of the photovoltaic tracking bracket system includes:

the acquisition module 10 is used for dynamically acquiring output power data of the photovoltaic power supply assembly according to a preset acquisition frequency in a first preset detection period of the current day;

the comparison module 20 is configured to compare the dynamically collected output power data with historical output power data of the photovoltaic power supply module at a same time of a historical day according to a preset comparison frequency, and obtain a first determination result according to a comparison result;

the analysis module 30 is configured to analyze a change rate of the output power data acquired in a last period of time according to a preset analysis frequency, and obtain a second determination result according to an analysis result;

a determining module 40, configured to determine a third determination result according to the first determination result and the second determination result that are dynamically obtained, where the first determination result, the second determination result, and the third determination result are all results that characterize whether to turn on a power saving mode;

and the control module 50 is configured to control the photovoltaic tracking bracket system to enter a power saving mode when the third dynamically obtained determination result is that the power saving mode is determined to be turned on.

In a possible implementation manner, the output power data acquired in the acquisition period corresponding to the preset acquisition frequency is a maximum output power value of the photovoltaic power supply assembly in the acquisition period, and the preset comparison frequency is the same as the preset acquisition frequency.

In a possible embodiment, the comparing module 20 is further configured to:

In a possible implementation manner, the output power data collected in the collection period corresponding to the preset collection frequency is a maximum output power value of the photovoltaic power supply module in the collection period, and the analysis module 30 is further configured to:

In a possible implementation manner, the judging module 40 is further configured to:

In a possible implementation manner, the first preset detection period is from the sunrise time of the current day to a first target time after the sunrise time, and a third preset duration is between the first target time and the sunrise time, and the collecting module 10 is further configured to:

the control module 50 is further configured to: and if the maximum output power values acquired in a plurality of continuous acquisition periods in the second preset detection period are smaller than a preset threshold value, controlling the photovoltaic tracking bracket system to enter a power saving mode.

In a possible implementation, the determining module 40 is further configured to:

In a possible embodiment, the control module 50 is further configured to:

The expansion content of the specific implementation mode of the control device of the photovoltaic tracking bracket system is basically the same as that of each embodiment of the control method of the photovoltaic tracking bracket system, and is not repeated here.

In addition, the embodiment of the invention also provides a computer readable storage medium, wherein the storage medium is stored with a control program of the photovoltaic tracking bracket system, and the control program of the photovoltaic tracking bracket system realizes the steps of a control method of the photovoltaic tracking bracket system when being executed by a processor.

Embodiments of the control device and the computer readable storage medium of the photovoltaic tracking bracket system of the present invention may refer to embodiments of the control method of the photovoltaic tracking bracket system of the present invention, and will not be described herein.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. The control method of the photovoltaic tracking bracket system is characterized by presetting a photovoltaic power supply assembly for supplying power to the photovoltaic tracking bracket system, and comprises the following steps of:

2. The control method of a photovoltaic tracking bracket system according to claim 1, wherein the output power data acquired in the acquisition period corresponding to the preset acquisition frequency is a maximum output power value of the photovoltaic power supply module in the acquisition period, and the preset comparison frequency is the same as the preset acquisition frequency.

3. The method for controlling a photovoltaic tracking rack system according to claim 2, wherein the step of comparing the dynamically collected output power data with historical output power data of the photovoltaic power module at a same time of a historical day according to a preset comparison frequency, and obtaining a first determination result according to the comparison result comprises:

4. The method for controlling a photovoltaic tracking rack system according to claim 2, wherein the step of analyzing a change rate of the output power data acquired in a last period of time with time according to a preset analysis frequency, and obtaining a second determination result according to the analysis result comprises:

5. The method of controlling a photovoltaic tracking stent system according to claim 1, wherein the step of determining a third determination result from the first determination result and the second determination result obtained dynamically comprises:

6. The control method of a photovoltaic tracking rack system according to claim 1, wherein the first preset detection period is a first target time after a sunrise time of the current day, the first target time being a third preset time period from the sunrise time, the control method of a photovoltaic tracking rack system further comprising:

7. The control method of a photovoltaic tracking rack system according to any one of claims 1 to 6, wherein the step of determining a third determination result from the first determination result and the second determination result obtained dynamically includes:

8. The method of controlling a photovoltaic tracking rack system according to any one of claims 1 to 6, wherein the step of controlling the photovoltaic tracking rack system to enter a power saving mode comprises:

9. The method of claim 8, wherein after the step of controlling the photovoltaic tracking rack system to enter a power saving mode, further comprising:

10. The method for controlling a photovoltaic tracking rack system according to claim 8, wherein the step of adjusting the maximum inclination angle of the photovoltaic module in the photovoltaic system to incline in the sunrise direction and the maximum inclination angle of the photovoltaic module to incline in the sunset direction to control the photovoltaic tracking rack system to enter the power saving mode comprises:

11. The method for controlling a photovoltaic tracking rack system according to claim 8, wherein the step of adjusting the maximum inclination angle of the photovoltaic module in the photovoltaic system to incline in the sunrise direction and the maximum inclination angle of the photovoltaic module to incline in the sunset direction to control the photovoltaic tracking rack system to enter the power saving mode comprises:

12. A control device of a photovoltaic tracking bracket system, characterized in that a photovoltaic power supply module for supplying power to the photovoltaic tracking bracket system is preset, the control device of the photovoltaic tracking bracket system comprises:

13. A control device for a photovoltaic tracking rack system, the control device comprising: memory, a processor and a control program of a photovoltaic tracking stent system stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the control method of a photovoltaic tracking stent system according to any one of claims 1 to 11.

14. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a control program of a photovoltaic tracking rack system, which when executed by a processor, implements the steps of the control method of a photovoltaic tracking rack system according to any one of claims 1 to 11.