Photovoltaic water pump restarting method, system, device and equipment

Abstract

The invention discloses a photovoltaic water pump restarting method, system, device and equipment, and relates to the technical field of frequency converter control. Based on the current output frequency corresponding to the maximum power value of the water pump in the working mode, it is determined that the water pump enters the sleep mode, the sleep mode is determined more accurately, and dynamic changes can be rapidly responded to keep the optimal working state. The dormancy time interval corresponding to the current dormancy times is determined according to the current output frequency and the preset performance parameters, compared with an unchanged fixed time interval, the restarting times are reduced, then the loss of the pump body is reduced, and the service life is prolonged. And under the conditions that the sleep time interval and the current sleep times meet the preset conditions and the sleep mode maintains the sleep time interval, the water pump is restarted, and continuity and automation of sleep restarting are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of frequency converter control, and particularly to a photovoltaic water pump restart method, system, device and equipment. Background Art

[0002] Conventional photovoltaic water pumps will enter the sleep state when detecting that the light radiation intensity is in the weak light state. Thus, a fixed time interval is set for restart after sleep. After restart, it starts to run and continues to check the light radiation intensity. If the radiation intensity is still in the weak light state, it will continue to restart after sleep according to the fixed time interval, and so on until the radiation intensity after restart is not in the weak light state and normal work is carried out. Such repeated restart trial and error lead to an increase in the loss of the pump body, and thus shorten the service life of the pump body.

[0003] Therefore, how to reduce the number of restart trial and error, thereby reducing the loss of the pump body and extending the service life of the pump body is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of the present invention is to provide a photovoltaic water pump restart method, system, device and equipment to solve the technical problems of increased pump body loss and shortened pump body life caused by a large number of restart trial and error.

[0005] To solve the above technical problems, the present invention provides a photovoltaic water pump restart method, including:

[0006] After the water pump is started, obtain the current output frequency of the water pump; wherein, the current output frequency is the output frequency corresponding to the maximum power value in the working mode of the water pump;

[0007] When controlling the water pump to enter the sleep mode based on the current output frequency, obtain the current sleep count and preset performance parameters;

[0008] Determine the sleep time interval corresponding to the current sleep count according to the current output frequency and the preset performance parameters;

[0009] When the sleep time interval, the current sleep count meet the preset conditions, and the sleep mode has maintained the sleep time interval, restart the water pump.

[0010] On the one hand, controlling the water pump to enter the sleep mode based on the current output frequency includes:

[0011] Obtain a preset sleep frequency and a preset sleep detection time;

[0012] When the current output frequency is less than the preset sleep frequency, record the maintenance time of the current output frequency maintaining in a state less than the preset sleep frequency;

[0013] When the maintenance time reaches the preset sleep detection time, control the water pump to enter the sleep mode.

[0014] On the other hand, the preset performance parameters include the rated frequency of the water pump and the wake-up coefficient. Determining the sleep time interval corresponding to the current sleep count according to the current output frequency and the preset performance parameters includes:

[0015] Determine a first ratio according to the ratio between the rated frequency of the water pump and the current output frequency;

[0016] Determine the sleep time interval corresponding to the current sleep count according to the first ratio and the wake-up coefficient.

[0017] On the other hand, the wake-up coefficients corresponding to different sleep counts are different;

[0018] When the sleep time interval corresponding to the (N - 1)th sleep count of the water pump is less than the sleep time interval corresponding to the Nth sleep count, the wake-up coefficients of the (N + 1)th sleep count are both less than the wake-up coefficients corresponding to the Nth sleep count and the (N - 1)th sleep count respectively;

[0019] When the sleep time interval corresponding to the (N - 1)th sleep count of the water pump is greater than the sleep time interval corresponding to the Nth sleep count, the wake-up coefficients of the (N + 1)th sleep count are both greater than the wake-up coefficients corresponding to the Nth sleep count and the (N - 1)th sleep count respectively.

[0020] On the other hand, the preset performance parameters include a sleep limit time and a preset sleep count; the process of determining whether the sleep time interval and the current sleep count meet the preset conditions includes:

[0021] Taking the current sleep count as a reference, obtain the sleep time intervals corresponding to each sleep count;

[0022] Determine the total sleep time interval according to each sleep time interval;

[0023] If the total sleep time interval is less than the sleep limit time and the current sleep count is less than the preset sleep count, then determine that the sleep time interval and the current sleep count meet the preset conditions.

[0024] On the other hand, the preset performance parameters further include a critical sleep time interval, and the method further includes:

[0025] When the sleep time interval of the current sleep count is greater than or equal to the critical sleep time interval, the total sleep time interval is less than the sleep limit time, and the current sleep count is less than the preset sleep count, it is determined that the sleep time interval and the current sleep count meet the preset conditions.

[0026] On the other hand, the method further includes:

[0027] When the sleep time interval and the current sleep count do not meet the preset conditions, if the sleep time interval of the current sleep count is less than the critical sleep time interval, it is determined whether the current sleep count is the first sleep count; if it is not the first sleep count, the start time of the frequency converter is determined;

[0028] When the start time is less than or equal to the first preset start time, the critical sleep time interval is used as the sleep time interval of the current sleep count and subsequent sleep counts, or the sleep time interval of the first sleep count is used as the sleep time interval of the current sleep count;

[0029] When the start time is greater than the first preset start time and less than the second preset start time, the critical sleep time interval is used as the sleep time interval of the current sleep count;

[0030] When in the sleep mode to maintain the sleep time interval, restart the water pump.

[0031] To solve the above technical problems, the present invention also provides a photovoltaic water pump system, which includes a photovoltaic array, a frequency converter and a water pump;

[0032] The photovoltaic array is connected to the frequency converter, and the frequency converter is connected to the water pump;

[0033] The frequency converter is used to execute the steps of the above-mentioned photovoltaic water pump restart method.

[0034] To solve the above technical problems, the present invention also provides a photovoltaic water pump restart device, including:

[0035] An acquisition module, configured to acquire the current output frequency of the water pump after the water pump starts; wherein, the current output frequency is the output frequency corresponding to the maximum power value of the water pump in the working mode;

[0036] A control module, configured to acquire the current sleep count and preset performance parameters when controlling the water pump to enter the sleep mode based on the current output frequency;

[0037] A determination module, configured to determine the sleep time interval corresponding to the current sleep count according to the current output frequency and the preset performance parameters;

[0038] A restart module, configured to restart the water pump when the sleep time interval, the current sleep count meet a preset condition, and the sleep mode has maintained the sleep time interval.

[0039] To solve the above technical problems, the present invention further provides an electronic device, including:

[0040] A memory, configured to store a computer program;

[0041] A processor, configured to implement the steps of the photovoltaic water pump restart method as described above when executing the computer program.

[0042] The beneficial effects of the present invention are as follows. First, after the water pump is started, based on the current output frequency corresponding to the maximum power value in the working mode of the water pump, it is determined that the water pump enters the sleep mode. By determining the sleep mode through the current output frequency of the maximum power value, the determination of the sleep mode is more accurate, and it can quickly respond to dynamic changes and maintain the best working state. Second, based on the current output frequency, the water pump is controlled to enter the sleep mode, and the current sleep count and preset performance parameters are obtained, so as to determine the sleep time interval corresponding to the current sleep count according to the current output frequency and the preset performance parameters. Considering that the current output frequency will gradually increase during the process of the sun rising and other light radiation intensities gradually increase, and the time span of the corresponding sleep time interval will also gradually increase. Compared with a fixed time interval, the restart times are significantly reduced. When the light radiation intensity gradually decreases during the process of the sun setting and other situations, the current output frequency will gradually decrease, and the time span of the corresponding sleep time interval will gradually decrease from a larger value. Compared with a fixed and unchanging time interval, while improving flexibility, the restart times are reduced, thereby reducing the loss of the pump body, extending the service life, and ensuring the operating state of the water pump. Third, when the sleep time interval, the current sleep count meet the preset conditions, and the sleep mode has maintained the sleep time interval, the water pump is restarted to realize the continuity and automation of sleep restart.

[0043] In addition, the present invention further provides a photovoltaic water pump system, a photovoltaic water pump restart device, and an electronic device, which have the same beneficial effects as the above photovoltaic water pump restart method. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] To more clearly illustrate the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0045] Figure 1 It is a flowchart of a photovoltaic water pump restart method provided by an embodiment of the present invention;

[0046] Figure 2 A schematic diagram for characterizing a preset sleep frequency and a preset sleep time provided by an embodiment of the present invention;

[0047] Figure 3 A flowchart of another method for restarting a photovoltaic water pump provided by an embodiment of the present invention;

[0048] Figure 4 A structural diagram of a photovoltaic water pump system provided by an embodiment of the present invention;

[0049] Figure 5 A structural diagram of a device for restarting a photovoltaic water pump provided by an embodiment of the present invention;

[0050] Figure 6 A structural diagram of an electronic device provided by an embodiment of the present invention. Detailed implementation manners

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] The core of the present invention is to provide a method, a system, a device and an equipment for restarting a photovoltaic water pump, so as to solve the technical problems of increased pump body loss and shortened pump body life caused by a large number of restart trial - and - error times.

[0053] In order to enable those skilled in the art to better understand the solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0054] When the sun just rises between 8:00 and 9:00 in the morning, the photovoltaic water pump is powered on, but the driving force is not enough to pump water. The photovoltaic water pump machine will go into sleep mode and restart after a fixed interval, which is currently defaulted to 5 minutes. If it still cannot pump water after restarting again, it will go into sleep mode again, resulting in repeated restarting of the water pump and increasing the loss of the pump body.

[0055] When the sun just rises between 4:00 and 5:00 in the afternoon, the photovoltaic water pump is powered on, but the driving force is not enough to pump water. The photovoltaic water pump machine will go into sleep mode and restart after a fixed interval, which is currently defaulted to 5 minutes. If it still cannot pump water after restarting again, it will go into sleep mode again, resulting in repeated restarting of the water pump and increasing the loss of the pump body.

[0056] Sometimes it is cloudy all day. The photovoltaic water pump has power, but the energy is not enough to pump water. The photovoltaic water pump machine will go into sleep mode and restart after a fixed time interval, which is currently defaulted to 5 minutes. If it still cannot pump water after restarting again, it will go into sleep mode again, resulting in the water pump restarting repeatedly and increasing the loss of the pump body.

[0057] During the day, occasionally a large cloud drifts over. The photovoltaic water pump has power, but the energy is not enough to pump water. The photovoltaic water pump machine will go into sleep mode and restart after a fixed time interval, which is currently defaulted to 5 minutes. If it still cannot pump water after restarting again, it will go into sleep mode again, resulting in the water pump restarting repeatedly and increasing the loss of the pump body. Therefore, whether the above light radiation intensity gradually increases or decreases, the same fixed time interval is used for restarting, resulting in an increase in the number of restarts, thereby increasing the loss of the pump body and reducing its lifespan. The photovoltaic water pump restart method provided by the present invention can solve the above technical problems.

[0058] Figure 1 It is a flowchart of a photovoltaic water pump restart method provided by an embodiment of the present invention, as Figure 1 shown. The method includes:

[0059] S11: After the water pump starts, obtain the current output frequency of the water pump; wherein, the current output frequency is the output frequency corresponding to the maximum power value of the water pump in the working mode;

[0060] S12: When controlling the water pump to enter the sleep mode based on the current output frequency, obtain the current sleep count and the preset performance parameters;

[0061] S13: Determine the sleep time interval corresponding to the current sleep count according to the current output frequency and the preset performance parameters;

[0062] S14: Restart the water pump when the sleep time interval, the current sleep count meet the preset conditions, and the sleep mode has maintained the sleep time interval.

[0063] Specifically, after the water pump starts, it is in the normal working mode. Only in this mode can the output frequency of the water pump be obtained. Therefore, after the water pump starts, the current output frequency is obtained during this startup. Here, in the working mode, the maximum power point tracking (MPPT) algorithm can be considered to track the maximum power point of the solar panel, and the water pump is driven to pump water by photovoltaic energy. After the water pump in the photovoltaic water pump system runs, it is in the MPPT working mode, and the output frequency corresponding to the maximum power of the photovoltaic panel array is adjusted. Judging based on the output frequency at the maximum power point in the MPPT working mode can more accurately determine the sleep mode, quickly respond to dynamic changes, and maintain the best working state. At the same time, it can output stably and improve the running stability.

[0064] The operating modes of the water pump of the present invention are sleep mode, working mode, and shutdown mode. When the light radiation intensity is less than a certain value, it will enter the sleep mode. Regarding when this embodiment will enter the sleep mode, the power of the photovoltaic panel array is adjusted to the maximum value, and it is compared with the preset power value in the sleep mode, or the output frequency of the water pump is measured based on the maximum power value, and it is compared with the preset sleep frequency in the sleep mode, etc. This is not limited herein.

[0065] In step S12, the situation where the water pump enters the sleep mode is determined based on the current output frequency. Here, it can only be determined whether the mode of the water pump corresponds to the sleep mode or the working mode according to the current output frequency, or on the basis of the current output frequency, combined with other parameters to jointly determine the mode of the water pump. This is not limited herein, as long as the operating mode of the water pump can be judged. In order to accurately measure the operating mode, a record of the preset sleep time will be added based on the comparison to ensure that it truly enters the sleep mode, rather than entering the sleep mode by misoperation or false touch.

[0066] As long as it is determined that the operating mode of the water pump is the sleep mode, immediately control the water pump to enter the sleep mode to obtain the current sleep count and the preset performance parameters.

[0067] When the operating mode of the water pump is the sleep mode, the current output frequency corresponding to the first sleep count is the output frequency when the water pump enters the sleep mode from the working mode. For the current sleep count, as long as it enters the sleep mode, it is counted as 1 sleep count. During the restart process, if the determined operating mode of the water pump during restart is the sleep mode, it will be +1 on the original sleep count to record the sleep count in real time. If the determined operating mode during restart is the working mode, the corresponding sleep count will be cleared so that when entering the sleep mode from the working mode later, the sleep count can be recorded again.

[0068] The preset performance parameters in the sleep mode are the preset parameters corresponding to the water pump when determining the sleep mode in the sleep mode. For example, the rated frequency Fbase of the water pump, the wake-up coefficient K, the preset sleep frequency Fwake, the preset sleep detection time Twake, the sleep limit time A, the preset sleep times B, etc. Among them, the preset sleep frequency Fwake is the critical value frequency corresponding to the boundary between the water pump not discharging water and discharging water, and the rated frequency Fbase of the water pump is the rated frequency of the motor.

[0069] In step S13, the sleep time interval corresponding to the current sleep times is determined according to the current output frequency and the preset performance parameters. It should be noted here that the sleep time interval in this embodiment is not a fixed value nor a fixed value determined manually according to experience values, but is calculated based on the current output frequency, that is, the output frequency corresponding to the water pump working mode when the water pump is restarted recently. Some of the parameters in the preset performance parameters combined with the examples in the above embodiments are used to determine the sleep time interval corresponding to the current sleep times. The calculation of the sleep time interval can be automatic calculation or manual calculation. No matter which calculation method is adopted, it corresponds to the calculation result of this calculation method.

[0070] In step S14, when the sleep time interval and the current sleep times meet the preset conditions, the subsequent restart process is carried out. It is considered that the current restart cannot be restarted without limit, and there will be restrictions on the total time interval of the sleep time interval and the sleep times, that is, the sleep limit time A and the preset sleep times B. As long as it does not exceed, the subsequent restart process can be carried out. Regarding the determination of the sleep limit time A and the preset sleep times B, it can be set according to experience values or calculated by certain specific algorithms. It is not set here and can be set according to the actual situation.

[0071] In addition, it can also be considered that the sleep time interval cannot be increased or decreased without limit. Especially when the sleep time interval gradually decreases, it will lead to a situation where the interval is smaller than the fixed time interval of the conventional technical solution. In this way, the number of trial-and-error times for restarting the water pump will increase compared with the conventional technical solution. Therefore, a critical sleep time interval is set and added to the preset conditions to prevent the sleep time intervals of each sleep times in this embodiment from being less than the critical sleep time interval, thereby reducing the number of restart trial-and-error times. When the light gradually increases, since the photovoltaic water pump operates in the MPPT mode and outputs at the maximum power, its power also gradually increases. There is basically a linear relationship between light and power. However, the power and frequency have a cubic linear relationship. Generally speaking, they are positively correlated and have the same growth trend.

[0072] When the sleep mode has been maintained until the sleep time interval under the condition of meeting the preset conditions, the water pump is restarted to obtain the next output frequency of the water pump, and the process returns to step S11 until the operating mode is the working mode. When it is determined to be the working mode, normal operation can be directly carried out.

[0073] It should be noted that the execution entity in the present invention is on the dedicated frequency converter of the photovoltaic water pump system. The currently obtained output frequency, the next output frequency, etc. are directly collected based on the output on the frequency converter, without the need to use an additional sensor for detecting the light radiation intensity. Although this sensor can accurately judge the light radiation intensity and the number of times is controllable, it will increase the hardware cost. The timing record of the sleep time interval and the counting record of the sleep times in the embodiments of the present invention do not require additional timer timing control, real-time clock (RTC) control on the keyboard to start and stop timing, human machine interface (HMI) control to start and stop the photovoltaic water pump timing, or Internet of Things (IOT) module control to start and stop timing, which will increase the hardware cost to a certain extent and even cannot solve the scenario where sunlight is blocked (it is cloudy all day or a cloud drifts by). The timing record of the sleep time interval and the counting record of the sleep times in the embodiments of the present invention adopt the counting and timing function on the frequency converter, saving hardware cost.

[0074] Compared with the additional detection sensor used for detecting the solar light radiation intensity in the conventional method and the additional timer used for timing the sleep time interval, the present invention does not require the setting of a detection sensor and is directly determined by the currently collected output frequency of the frequency converter. Nor does it require the setting of an additional timer and is directly timed by the counter in the frequency converter, saving hardware cost.

[0075] The beneficial effects of the embodiments of the present invention are as follows. First, after the water pump is started, based on the current output frequency corresponding to the maximum power value in the working mode of the water pump, it is determined that the water pump enters the sleep mode. By determining the sleep mode through the current output frequency of the maximum power value, the determination of the sleep mode is more accurate, and it can quickly respond to dynamic changes and maintain the best working state. Second, based on the current output frequency, the water pump is controlled to enter the sleep mode, and the current sleep count and preset performance parameters are obtained to determine the sleep time interval corresponding to the current sleep count according to the current output frequency and the preset performance parameters. Considering that when the light radiation intensity gradually increases during the rising process of the sun, its current output frequency will gradually increase, and the time span of the corresponding sleep time interval will also gradually increase. Compared with a fixed time interval, the restart times are significantly reduced. When the light radiation intensity gradually decreases during the setting process of the sun, its current output frequency will gradually decrease, and the time span of the corresponding sleep time interval gradually decreases from a larger value. Compared with a fixed and unchanging time interval, while improving flexibility, the restart times are reduced, thereby reducing the loss of the pump body, extending the service life, and ensuring the operating state of the water pump. Third, when the sleep time interval, the current sleep count meet the preset conditions, and the sleep mode has maintained the sleep time interval, the water pump is restarted to achieve the continuity and automation of sleep restart.

[0076] In some embodiments, controlling the water pump to enter the sleep mode based on the current output frequency includes:

[0077] Obtaining a preset sleep frequency and a preset sleep detection time;

[0078] When the current output frequency is less than the preset sleep frequency, recording the maintenance time when the current output frequency maintains a state less than the preset sleep frequency;

[0079] When the maintenance time reaches the preset sleep detection time, controlling the water pump to enter the sleep mode.

[0080] Specifically, obtain a preset sleep frequency Fwake and a preset sleep detection time Twake. After the water pump of the photovoltaic water pump system runs, it is in the MPPT working mode. Determine whether the current output frequency is less than the preset sleep frequency. If it is less, it may enter the sleep mode currently. At this time, it is necessary to record the maintenance time when the current output frequency maintains a state less than the preset sleep frequency, and further determine whether the maintenance time reaches the preset sleep detection time Twake. If it reaches, it is determined as the sleep mode, and the water pump is controlled to enter the sleep mode. In any of the above situations, if the current output frequency is greater than or equal to the preset sleep frequency, or the maintenance time does not reach the preset sleep detection time, it is the working mode.

[0081] Figure 2It is a schematic diagram showing a preset sleep frequency and a preset sleep time provided by an embodiment of the present invention. As Figure 2 shown, the relationship between its output frequency and the preset sleep frequency is as follows. For example, at time t1, the output frequency Fout is less than the preset sleep frequency at this time, and the maintenance time is recorded. Among them, if the maintenance time reaches the preset sleep time Twake, that is, from time t1 to time t2, it means entering the sleep mode.

[0082] This embodiment provides a method for making a judgment based on the current output frequency. At the same time, based on the determination of the current output frequency, the maintenance time is recorded to ensure that when the maintenance time reaches the preset sleep detection time, the sleep mode can be more accurately determined, and it can quickly respond to dynamic changes and maintain the best working state. It can output stably and improve the operation stability.

[0083] In some embodiments, the preset performance parameters include the rated frequency of the water pump and the wake-up coefficient. Determining the sleep time interval corresponding to the current sleep times according to the current output frequency and the preset performance parameters includes: determining a first ratio according to the ratio between the rated frequency of the water pump and the current output frequency;

[0084] Determining the sleep time interval corresponding to the current sleep times according to the first ratio and the wake-up coefficient.

[0085] Specifically, obtain the rated frequency Fbase of the water pump and the wake-up coefficient K. According to the rated frequency of the water pump and the current output frequency, the two parameters can be divided. It can be the rated frequency of the water pump divided by the current output frequency, or the current output frequency divided by the rated frequency of the water pump. It is not limited here. If the first ratio obtained by dividing the rated frequency of the water pump by the current output frequency is used to judge whether it is within the normal working range and whether it is operating at the best efficiency point.

[0086] Multiplying the first ratio and the wake-up coefficient to obtain the sleep time interval corresponding to the current sleep times.

[0087] The formula is as follows:

[0088] T = (Fbase / Fout) × K;

[0089] Wherein, Fbase is the rated frequency of the water pump, Fout is the current output frequency, Fbase / Fout is the first ratio, and K is the wake-up coefficient.

[0090] The calculation process of the sleep time interval corresponding to the current sleep times provided by this embodiment determines the sleep time interval corresponding to the current sleep times through the current output frequency, the rated frequency of the water pump, and the wake-up coefficient that change in real time, so as to improve the prediction accuracy of the sleep time interval and avoid the increase in the number of restart times when a fixed time interval is reached.

[0091] In some embodiments, the wake-up coefficients corresponding to different dormancy times are different;

[0092] When the dormancy time interval corresponding to the (N - 1)th dormancy time of the water pump is less than the dormancy time interval corresponding to the Nth dormancy time, the wake-up coefficients of the (N + 1)th dormancy time are all less than the wake-up coefficients corresponding to the Nth dormancy time and the (N - 1)th dormancy time respectively;

[0093] When the dormancy time interval corresponding to the (N - 1)th dormancy time of the water pump is greater than the dormancy time interval corresponding to the Nth dormancy time, the wake-up coefficients of the (N + 1)th dormancy time are all greater than the wake-up coefficients corresponding to the Nth dormancy time and the (N - 1)th dormancy time respectively.

[0094] Specifically, considering that the time span corresponding to the dormancy time interval gradually decreases or gradually reduces when the light radiation intensity gradually increases or gradually decreases. At the same time, the wake-up coefficient also changes with the light radiation intensity, which will also affect the accuracy of the dormancy time interval.

[0095] When the dormancy time interval corresponding to the (N - 1)th dormancy time of the water pump is less than the dormancy time interval corresponding to the Nth dormancy time, it corresponds to a gradually increasing light radiation intensity, and the wake-up coefficient corresponding to each dormancy time gradually decreases, that is, the wake-up coefficients of the (N + 1)th dormancy time are all less than the wake-up coefficients corresponding to the Nth dormancy time and the (N - 1)th dormancy time respectively. Similarly, when the dormancy time interval corresponding to the (N - 1)th dormancy time of the water pump is greater than the dormancy time interval corresponding to the Nth dormancy time, it corresponds to a gradually decreasing light radiation intensity, and the wake-up times corresponding to each dormancy time gradually increase, that is, the wake-up coefficients of the (N + 1)th dormancy time are all greater than the wake-up coefficients corresponding to the Nth dormancy time and the (N - 1)th dormancy time respectively.

[0096] This embodiment considers the parameter of the wake-up coefficient in the setting of the dormancy time interval corresponding to each dormancy time. Therefore, when determining the magnitude relationship of the wake-up coefficients corresponding to the dormancy time interval for each dormancy time, it provides the accuracy of determining the dormancy time interval.

[0097] In some embodiments, the preset performance parameters include a dormancy limit time and a preset number of dormancy times; the process of determining whether the dormancy time interval and the current number of dormancy times meet the preset conditions includes:

[0098] Taking the current number of dormancy times as a reference, obtaining the dormancy time intervals corresponding to each number of dormancy times;

[0099] Determining the total dormancy time interval according to each dormancy time interval;

[0100] When the total sleep time interval is less than the sleep limit time and the current sleep count is less than the preset sleep count, it is determined that the sleep time interval and the current sleep count meet the preset conditions.

[0101] Specifically, the preset conditions are set based on the limitations of the total sleep time interval and the sleep count. Taking the current sleep count as a reference, the sleep time intervals for each sleep count are obtained and summed up to get the total sleep time interval. It is judged whether the total sleep time interval exceeds the sleep limit time. If so, it means that the sleep mode has not entered the working mode and the corresponding sleep time is relatively long at this time, and the restart trial and error may take a long time. Therefore, to cut losses in time, as long as the sleep limit time is exceeded, it means that the preset conditions are not met, and the restart will not continue according to the sleep time interval of the current sleep count, and the sleep fault state will be directly entered. When the total sleep time interval is less than the sleep limit time, it is continued to judge whether the current sleep count is less than the preset sleep count. If so, it means that the two parameters (sleep time interval, current sleep count) meet the preset conditions. If the current sleep count is greater than or equal to the preset sleep count, it means that the current sleep count has exceeded the preset sleep count, and the count of the sleep count represents the number of restart trial and errors. Therefore, the preset conditions are not met.

[0102] In the case where the above preset conditions are not met, a fault alarm is directly issued and it is not automatically started, that is, the shutdown mode is entered. After the shutdown in this embodiment, it is not automatically restarted and cannot be automatically reset. It needs to be manually reset or powered off and restarted. Compared with the conventional technical solution, after reporting a sleep fault, it will be automatically reset after a period of time. In the present invention, it needs to be manually cleared of the fault before it can return to normal.

[0103] The preset conditions provided in this embodiment are set based on the sleep time interval and the current sleep count respectively to set corresponding sub-preset conditions, so as to avoid unrestricted restart trial and error and reduce the number of restart trial and errors.

[0104] In some other embodiments, the preset performance parameter further includes a critical sleep time interval, and the method further includes:

[0105] When the sleep time interval of the current sleep count is greater than or equal to the critical sleep time interval, the total sleep time interval is less than the sleep limit time, and the current sleep count is less than the preset sleep count, it is determined that the sleep time interval and the current sleep count meet the preset conditions.

[0106] Based on the settings of the preset conditions in the above embodiments, which are set based on the sleep time interval and the current sleep count respectively to set corresponding sub-preset conditions, in this embodiment, a critical sleep time interval is added. Here, it is mainly set for the sleep time interval corresponding to each sleep count. The fixed time interval set conventionally is a specific value set according to empirical values. In the present invention, considering the improvement of reducing the restart trial-and-error count, if the sleep time interval of the current sleep count is less than the critical sleep time interval, and during the process of gradually increasing the light radiation intensity, the sleep time intervals of subsequent sleep counts gradually decrease, then the corresponding restart trial-and-error count will increase compared to the restart trial-and-error count in the conventional technical solution with a fixed time interval. Therefore, to prevent such a technical solution from decreasing without limit, in this embodiment, a comparison between the sleep time interval of the current sleep count and the critical sleep time interval is added. When the sleep time interval of the current sleep count is greater than or equal to the critical sleep time interval, and the total sleep time interval is less than the sleep limit time, and the current sleep count is less than the preset sleep count, it is determined that the preset conditions are met. If any other situation occurs in the comparison of the above parameters, it is determined that the preset conditions are not met.

[0107] The setting of the preset conditions provided in this embodiment is based on the sleep time interval of each sleep count, the total sleep time interval, and the current sleep count respectively to set corresponding sub-preset conditions, preventing the sleep time interval from decreasing without limit, so as to avoid unlimited restart trial-and-error and reduce the restart trial-and-error count.

[0108] In some embodiments, considering that as long as the preset conditions are not met, the shutdown mode is directly entered. At the same time, considering that only when the sleep time interval of the current sleep count is less than the critical sleep time interval, and the other parameter comparison processes meet the corresponding sub-preset conditions, in this case, it further includes:

[0109] When the sleep time interval and the current sleep count do not meet the preset conditions, if the sleep time interval of the current sleep count is less than the critical sleep time interval, determine whether the current sleep count is the first sleep count; if it is not the first sleep count, determine the start-up time of the frequency converter;

[0110] When the start-up time is less than or equal to the first preset start-up time, take the critical sleep time interval as the sleep time interval of the current sleep count and subsequent sleep counts, or take the sleep time interval of the first sleep count as the sleep time interval of the current sleep count;

[0111] When the start-up time is greater than the first preset start-up time and less than the second preset start-up time, take the critical sleep time interval as the sleep time interval of the current sleep count;

[0112] Restart the water pump in the sleep mode to maintain the sleep time interval.

[0113] When the sleep time interval and the current sleep count do not meet the preset conditions, if the sleep time interval of the current sleep count is less than the critical sleep time interval, determine whether the current sleep count is the first sleep count; if it is the first sleep count, then use the critical sleep time interval as the sleep time interval of the current sleep count.

[0114] If it is not the first sleep count, then determine the start time of the frequency converter.

[0115] When the start time is less than or equal to the first preset start time, then use the critical sleep time interval as the sleep time interval of the current sleep count and subsequent sleep counts, or use the sleep time interval of the first sleep count as the sleep time interval of the current sleep count.

[0116] When the start time is greater than the first preset start time and less than the second preset start time, use the critical sleep time interval as the sleep time interval of the current sleep count.

[0117] After determining the sleep time interval of the current sleep count and maintaining it until the sleep time interval, restart the water pump.

[0118] Specifically, in this case, it is necessary to determine whether the current sleep count is the first sleep count. If it is the first sleep count, then use the critical sleep time interval as the sleep time interval of the current sleep count to ensure that whether the light radiation intensity gradually increases or decreases, the number of restart trial and error times is reduced. When it is not the first sleep count, it is necessary to check whether it corresponds to the time point of the light radiation intensity, which can be viewed through the start time of the frequency converter. Usually, the start time of the frequency converter will have a fixed time of start and stop, restricting the cumulative power-on time. If the start time at this time is less than or equal to the first preset start time, it means that the running time of the water pump is when the sun gradually rises in the morning, then the subsequent sleep time intervals will gradually decrease. At this time, the critical sleep time interval will be used as the sleep time interval of the current sleep count and subsequent sleep counts, or the sleep time interval of the first sleep count will be used as the sleep time interval of the current sleep count to achieve the situation of reuse or recycling.

[0119] If the start time is greater than the first preset start time and less than the second preset start time, it is determined that the subsequent sleep time intervals will gradually lengthen. However, there will be situations such as the sun gradually setting in the afternoon and the sky changing from cloudy to sunny, resulting in the first sleep time interval being less than the critical sleep time interval and the non-first sleep time interval being greater than or equal to the critical sleep time interval. Therefore, only use the critical sleep time interval as the sleep time interval of the current sleep count.

[0120] After determining the sleep time interval of the current sleep count, the subsequent restart process is carried out.

[0121] Under the premise of not meeting the preset conditions in this embodiment, it is necessary to analyze whether there is a situation where the sleep time interval of the current sleep count is less than the critical sleep time interval. In this case, the subsequent restart of the water pump is continued. That is, considering the current sleep count as the first or non-first sleep count, the critical sleep time interval is corresponding to the sleep time interval of the current sleep count, so as to reduce the reduction of the restart trial-and-error time of the current sleep count and thus the increase of the restart trial-and-error times.

[0122] In some embodiments, when the operating mode of the water pump is the sleep mode, it further includes:

[0123] Obtain the current working duration and the preset working duration corresponding to the frequency converter of the photovoltaic water pump system since it was powered on;

[0124] If the current working duration reaches the preset working duration, then control the operating mode of the water pump to switch from the sleep mode to the stop mode.

[0125] Specifically, considering the situation of the sun setting or cloudy days, there will be a decrease in the light radiation intensity, and the sleep time interval will gradually lengthen. Anyway, while the current is gradually lengthening, the system is also calculating the sleep time interval corresponding to each sleep count, which will increase the computing resources and also increase the restart trial-and-error times to a certain extent. Therefore, this embodiment considers shutting down the operating mode of the water pump in advance and switching it to the stop mode.

[0126] It is necessary to obtain the current working duration and the preset working duration corresponding to the frequency converter since it was powered on. When the current working duration reaches the preset working duration, it means that the current cumulative working time is relatively long. At this time, it also verifies the process of the gradual decrease in the light radiation intensity during the sun setting process. Therefore, the operating mode is switched to the stop mode in advance here, and the sleep restart scheme is ended in advance.

[0127] When the current working duration reaches the preset working duration in this embodiment, it is directly switched to the stop mode, saving computing resources, ending the calculation process of sleep restart in advance, and reducing the restart trial-and-error times.

[0128] Figure 3 It is a flowchart of another photovoltaic water pump restart method provided by an embodiment of the present invention. As Figure 3 shown, the steps are:

[0129] S21: Obtain the preset performance parameters in the sleep mode of the water pump;

[0130] S22: Determine whether to enter the sleep mode when the water pump is in the MPPT working mode. If so, proceed to step S23; if not, proceed to step S27;

[0131] S23: Record the current sleep count and the total sleep time interval;

[0132] S24: Determine whether the total sleep time interval and the current sleep count exceed the sleep limit time and the preset sleep count of the preset performance parameters respectively. If so, proceed to step S25; if not, proceed to step S26;

[0133] S25: Report a sleep fault;

[0134] S26: Continue the sleep mode and restart the water pump when the sleep time interval corresponding to the current sleep count arrives;

[0135] S27: Operate normally and end.

[0136] The present invention is applied to a special frequency converter for photovoltaic water pumps. The solar panel array supplies power to the photovoltaic water pump, and the output end of the photovoltaic water pump is connected to the water pump. The maximum power point of the solar panel is tracked through the MPPT algorithm, and the water pump is driven to pump water by photovoltaic energy. In the above four scenarios, the photovoltaic water pump will perform sleep and restart actions. Taking the actual customer application as an example, for a 4kW, 50Hz asynchronous motor water pump, when the light irradiance is not high, the following processing steps are divided according to the time logic sequence:

[0137] Step (1): Automatically start the water pump.

[0138] The photovoltaic water pump will be set to the automatic operation mode and start automatically once powered on. The rated frequency of the water pump is Fbase, the wake-up coefficient is K, the preset sleep frequency is Fwake, the preset sleep detection time is Twake, the sleep limit time is A, and the preset sleep count is B. After the preset is completed, proceed to step (2).

[0139] Step (2): MPPT working mode, detect the output frequency.

[0140] After the photovoltaic water pump runs, it is in the MPPT working mode, and the power of the photovoltaic panel array is adjusted to the maximum value. At this time, detect the current output frequency Fout1 of the photovoltaic water pump and proceed to step (3).

[0141] Step (3): Sleep judgment.

[0142] When Fout1 < Fwake and it lasts for Twake time, the water pump stops and enters the sleep mode.

[0143] The sleep count Count is automatically incremented by 1, and the sleep timer Cnt starts.

[0144] The number of sleep times Count = 1, record the current output frequency Fout1, and jump to step (4).

[0145] The number of sleep times Count = 2, record the current output frequency Fout2, and jump to step (5).

[0146] The number of sleep times Count ≥ 3, record the current output frequency Fout3, and jump to step (6).

[0147] When Foutn > Fwake, enter the normal working state, clear the number of sleep times Count, and clear the sleep timer Cnt. Then jump to step (8).

[0148] When the sleep timer Cnt ≤ A and the number of sleep times Count ≥ B, the photovoltaic water pump reports a sleep fault and enters step (7). After shutdown, it will not start automatically, and the fault cannot be automatically reset unless the fault is cleared manually.

[0149] Step (4): Calculate T1 and sleep.

[0150] In the shutdown state of the photovoltaic water pump, in the mode of automatically calculating the sleep interval time, according to the formula T1 = (Fbase / Fout1) × K, after the sleep interval time of T1, the photovoltaic water pump wakes up and runs automatically. Then jump to step (2).

[0151] Step (5): Calculate T2 and sleep.

[0152] In the shutdown state of the photovoltaic water pump, in the mode of automatically calculating the sleep interval time, according to the formula T2 = (Fbase / Fout2) × K, after the sleep interval time of T2, the photovoltaic water pump wakes up and runs automatically. Then jump to step (2).

[0153] Step (6): Calculate T3 and sleep.

[0154] In the shutdown state of the photovoltaic water pump, in the mode of automatically calculating the sleep interval time, according to the formula T3 = (Fbase / Fout2) × K, after the sleep interval time of T3, the photovoltaic water pump wakes up and runs automatically. Then jump to step (2).

[0155] Step (7): Fault shutdown.

[0156] In the shutdown state of the photovoltaic water pump, after manually clearing the fault, enter step (2).

[0157] Step (8): Normal operation.

[0158] In the normal operation state of the photovoltaic water pump, enter step (2).

[0159] In the above embodiment, the description is given with three sleep times as an example.

[0160] Furthermore, the present invention also provides a photovoltaic water pump system. Figure 4 FIG. [FIGURE NUMBER] is a structural diagram of a photovoltaic water pump system provided by an embodiment of the present invention. As Figure 4 shown, the photovoltaic water pump system includes a photovoltaic array 1, an inverter 2, and a water pump 3;

[0161] The photovoltaic array 1 is connected to the inverter 2, and the inverter 2 is connected to the water pump 3;

[0162] The inverter 2 is configured to perform the steps of the above-mentioned photovoltaic water pump restart method.

[0163] Specifically, the photovoltaic array is formed by connecting multiple solar cell modules in series and parallel. Its output voltage and current change with the light intensity and temperature, converting solar energy into direct current electrical energy to provide power for the entire system. The output end of the photovoltaic array is connected to the direct current input end of the inverter. The inverter converts the direct current generated by the photovoltaic array into alternating current to drive the operation of the water pump motor. Its direct current input end is connected to the output end of the photovoltaic array, and the alternating current output end is connected to the motor of the water pump. The motor of the water pump is connected to the alternating current output end of the inverter, and its speed is controlled by the inverter to adjust the load size of the system.

[0164] For the introduction of a photovoltaic water pump system provided by the present invention, please refer to the above method embodiments. The present invention will not be elaborated herein, and it has the same beneficial effects as the above photovoltaic water pump restart method.

[0165] The above has described in detail each embodiment corresponding to the photovoltaic water pump restart method. On this basis, the present invention also discloses a water pump restart device for a photovoltaic water pump system corresponding to the above method. Figure 5 FIG. [FIGURE NUMBER] is a structural diagram of a photovoltaic water pump restart device provided by an embodiment of the present invention. As Figure 5 shown, the photovoltaic water pump restart device includes:

[0166] An acquisition module 11, configured to acquire the current output frequency of the water pump after the water pump starts; wherein, the current output frequency is the output frequency corresponding to the maximum power value of the water pump in the working mode;

[0167] A control module 12, configured to acquire the current sleep count and preset performance parameters when controlling the water pump to enter the sleep mode based on the current output frequency;

[0168] A determination module 13, configured to determine the sleep time interval corresponding to the current sleep count according to the current output frequency and the preset performance parameters;

[0169] A restart module 14, configured to restart the water pump when the sleep time interval, the current sleep count meet the preset conditions, and the sleep mode has maintained the sleep time interval. Please note that the [FIGURE NUMBER] placeholders need to be filled with the actual figure numbers in the original text.

[0170] Since the embodiments of the device part correspond to the above embodiments, the embodiments of the device part are described with reference to the embodiments of the above method part and will not be repeated here.

[0171] For the introduction of a photovoltaic water pump restart device provided by the present invention, please refer to the above method embodiments. The present invention will not be repeated here, and it has the same beneficial effects as the above photovoltaic water pump restart method.

[0172] Figure 6 The following is a structural diagram of an electronic device provided by an embodiment of the present invention. As Figure 6 shown, the electronic device includes:

[0173] A memory 21 for storing computer programs;

[0174] A processor 22 for implementing the steps of the photovoltaic water pump restart method when executing the computer program.

[0175] Among them, the processor 22 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 22 may be implemented in at least one hardware form of a digital signal processor (DSP), a field-programmable gate array (FPGA), or a programmable logic array (PLA). The processor 22 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the wake state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 22 may be integrated with a graphics processing unit (GPU), and the GPU is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 22 may further include an artificial intelligence (AI) processor for processing computational operations related to machine learning.

[0176] The memory 21 may include one or more computer-readable storage media, which may be non-transitory. The memory 21 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices and flash storage devices. In this embodiment, the memory 21 is at least used to store the following computer program 211. After being loaded and executed by the processor 22, the computer program can implement the relevant steps of the photovoltaic water pump restart method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 21 may also include an operating system 212 and data 213, etc., and the storage method may be transient storage or permanent storage. Among them, the operating system 212 may include Windows, Unix, Linux, etc. The data 213 may include, but is not limited to, the data involved in the photovoltaic water pump restart method, etc.

[0177] In some embodiments, the electronic device may further include a display screen 23, an input / output interface 24, a communication interface 25, a power supply 26, and a communication bus 27.

[0178] Those skilled in the art can understand that Figure 6 the structure shown in

[0179] does not constitute a limitation on the electronic device and may include more or fewer components than those shown in the figure.

[0180] For the introduction of an electronic device provided by the present invention, please refer to the foregoing method embodiments. The present invention will not be elaborated herein again, and it has the same beneficial effects as the above photovoltaic water pump restart method.

[0181] Furthermore, the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by the processor 22, it implements the steps of the photovoltaic water pump restart method as described above.

[0182] It can be understood that if the method in the above embodiments 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 such an understanding, the technical solution of the present invention, in essence, or the part that makes a contribution to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and executes all or part of the steps of the methods of the various embodiments of the present invention. The foregoing storage media include: USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs, etc., which can store program codes.

[0183] For the introduction of a computer-readable storage medium provided by the present invention, please refer to the above method embodiments, which will not be elaborated herein again. It has the same beneficial effects as the above photovoltaic water pump restart method.

[0184] The above has provided a detailed introduction to a photovoltaic water pump restart method, system, device, and equipment provided by the present invention. Each embodiment in the specification is described in a progressive manner. The key point of each embodiment is the difference from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

[0185] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including an..." does not exclude the existence of another identical element in the process, method, article or device including the element.

Claims

1. A method for restarting a photovoltaic water pump, characterized in that, Including: After the water pump is started, obtain the current output frequency of the water pump; wherein, the current output frequency is the output frequency corresponding to the maximum power value of the water pump in the working mode; When controlling the water pump to enter the sleep mode based on the current output frequency, obtain the current sleep count and preset performance parameters; Determine the sleep time interval corresponding to the current sleep count according to the current output frequency and the preset performance parameters; When the sleep time interval, the current sleep count meet the preset conditions, and the sleep mode has maintained the sleep time interval, restart the water pump.

2. The photovoltaic water pump restart method according to claim 1, wherein Controlling the water pump to enter the sleep mode based on the current output frequency includes: Obtain a preset sleep frequency and a preset sleep detection time; When the current output frequency is less than the preset sleep frequency, record the duration when the current output frequency maintains a state less than the preset sleep frequency; When the duration reaches the preset sleep detection time, control the water pump to enter the sleep mode.

3. The photovoltaic water pump restart method according to claim 1, wherein The preset performance parameters include the rated frequency of the water pump and a wake-up coefficient. Determining the sleep time interval corresponding to the current sleep count according to the current output frequency and the preset performance parameters includes: Determine a first ratio according to the ratio between the rated frequency of the water pump and the current output frequency; Determine the sleep time interval corresponding to the current sleep count according to the first ratio and the wake-up coefficient.

4. The photovoltaic water pump restart method according to claim 3, wherein, The wake-up coefficients corresponding to different sleep counts are different; When the sleep time interval corresponding to the (N - 1)-th sleep count of the water pump is less than the sleep time interval corresponding to the N-th sleep count, the wake-up coefficients of the (N + 1)-th sleep count are both less than the wake-up coefficients corresponding to the N-th sleep count and the (N - 1)-th sleep count respectively; When the sleep time interval corresponding to the (N - 1)-th sleep count of the water pump is greater than the sleep time interval corresponding to the N-th sleep count, the wake-up coefficients of the (N + 1)-th sleep count are both greater than the wake-up coefficients corresponding to the N-th sleep count and the (N - 1)-th sleep count respectively.

5. The photovoltaic water pump restart method according to claim 1, wherein The preset performance parameters include a sleep limit time and a preset sleep count; The process of determining whether the sleep time interval and the current sleep count meet the preset conditions includes: Based on the current sleep count, obtain the sleep time intervals corresponding to each sleep count; Determine the total sleep time interval according to each sleep time interval; When the total sleep time interval is less than the sleep limit time and the current sleep count is less than the preset sleep count, it is determined that the sleep time interval and the current sleep count meet the preset conditions.

6. The photovoltaic water pump restart method according to claim 1, wherein, The preset performance parameters further include a critical sleep time interval, and the method further includes: When the sleep time interval of the current sleep count is greater than or equal to the critical sleep time interval, the total sleep time interval is less than the sleep limit time, and the current sleep count is less than the preset sleep count, it is determined that the sleep time interval and the current sleep count meet the preset conditions.

7. The photovoltaic water pump restart method according to claim 6, characterized in that The method further includes: When the sleep time interval and the current sleep count do not meet the preset conditions, if the sleep time interval of the current sleep count is less than the critical sleep time interval, determine whether the current sleep count is the first sleep count; if it is not the first sleep count, determine the startup time of the frequency converter. When the startup time is less than or equal to the first preset startup time, use the critical sleep time interval as the sleep time interval for the current sleep count and subsequent sleep counts, or use the sleep time interval of the first sleep count as the sleep time interval for the current sleep count. When the startup time is greater than the first preset startup time and less than the second preset startup time, use the critical sleep time interval as the sleep time interval for the current sleep count. Restart the water pump when the sleep mode maintains the sleep time interval.

8. A photovoltaic water pump system, characterized in that, The photovoltaic water pump system includes a photovoltaic array, a frequency converter, and a water pump. The photovoltaic array is connected to the frequency converter, and the frequency converter is connected to the water pump. The frequency converter is used to execute the steps of the photovoltaic water pump restart method according to any one of claims 1 to 7 above.

9. A water pump restart device for a photovoltaic water pump system, characterized in that Comprising: An acquisition module, configured to acquire the current output frequency of the water pump after the water pump starts; wherein, the current output frequency is the output frequency corresponding to the maximum power value of the water pump in the working mode. A control module, configured to acquire the current sleep count and preset performance parameters when controlling the water pump to enter the sleep mode based on the current output frequency. A determination module, configured to determine the sleep time interval corresponding to the current sleep count according to the current output frequency and the preset performance parameters. A restart module, configured to restart the water pump when the sleep time interval and the current sleep count meet the preset conditions and the sleep mode has maintained the sleep time interval.

10. An electronic device, characterized in that, Comprising: A memory, configured to store a computer program. A processor, configured to implement the steps of the photovoltaic water pump restart method according to any one of claims 1 to 7 when executing the computer program.

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