Irrigation system based on solar power supply

Abstract

The invention relates to an irrigation system based on solar power supply, and relates to the technical field of irrigation systems. The reservoir is used for storing irrigation water; a photovoltaic system; the photovoltaic system comprises a photovoltaic panel, an inverter, a storage battery and an energy management device; a water collecting tank; the water collecting tank is connected with a water lifting device; the water lifting device is used for lifting water from the underground water well; a salt water desalination device; the salt water desalting device is used for desalting water in the water collecting tank and conveying the desalted water to the water storage tank; a drip irrigation system; the drip irrigation system obtains desalted water from the reservoir for drip irrigation; wherein the water lifting device, the salt water desalting device and the drip irrigation system are powered by an inverter.

Description

Technical Field

[0001] The present application relates to the technical field of irrigation systems, and in particular to an irrigation system based on solar energy power supply. Background Art

[0002] In modern agricultural production, irrigation is a key link to ensure the growth of crops and increase yields. Traditional irrigation methods mainly rely on mains power supply or fuel-powered equipment to drive water lifting, water delivery and irrigation operations. However, this faces many problems. On the one hand, the mains-powered irrigation system requires the construction of a complete power grid line to cover the farmland area. For some remote areas, the cost of laying the power grid is high and the subsequent maintenance is difficult; on the other hand, the use of fuel-powered equipment will not only consume a large amount of non-renewable energy, but also bring about environmental pollution and other problems, which does not meet the requirements of sustainable development.

[0003] How to solve this technical problem is a technical difficulty that technicians in this field need to overcome. Summary of the invention

[0004] In order to at least partially solve the above technical problems, the present application provides an irrigation system based on solar power supply.

[0005] The present application provides an irrigation system based on solar power supply, which adopts the following technical solution.

[0006] An irrigation system based on solar power supply, characterized by comprising:

[0007] A water reservoir; the water reservoir is used to store irrigation water;

[0008] Photovoltaic system; the photovoltaic system includes photovoltaic panels, inverters, batteries and energy management devices;

[0009] A water collection tank; the water collection tank is connected to a water extraction device; the water extraction device is used to extract water from a groundwater well;

[0010] A salt water desalination device; the salt water desalination device is used to desalinate the water in the water collection tank and transport the desalinated water to the water storage tank;

[0011] Drip irrigation system; the drip irrigation system obtains desalinated water from the water reservoir for drip irrigation;

[0012] Wherein, the water extraction device, the salt water desalination device and the drip irrigation system are powered by the inverter;

[0013] The energy management device receives soil moisture information collected by the soil moisture sensor and receives meteorological data from the meteorological station; determines the water requirement of the crop in the current time period according to the crop type and growth stage; calculates the required irrigation amount and formulates an irrigation plan based on the soil moisture, meteorological data and crop water requirement; and adjusts the power distribution of the photovoltaic system according to the irrigation plan.

[0014] By adopting the above technical solution, the energy management device determines the crop water requirement based on the soil moisture information collected by the soil moisture sensor and the meteorological data of the meteorological station, combined with the crop type and growth stage, to formulate an irrigation plan and adjust the power distribution of the photovoltaic system according to the plan, ensuring that the entire irrigation system can efficiently irrigate crops under different environmental conditions, thereby ensuring the implementation of the irrigation plan.

[0015] Optionally, adjust the power distribution of the PV system according to the irrigation plan, including:

[0016] Based on the irrigation plan, the power and duration required for the drip irrigation system, the water lifting device, and the salt water desalination device to operate during the irrigation operation are obtained, and the total power demand during the execution of the irrigation plan is obtained;

[0017] Evaluate the power generation capacity of the photovoltaic system based on the current light intensity and the power generation efficiency of the photovoltaic panels, and determine the total amount of power that can be provided and the power distribution based on the battery storage reserve;

[0018] When the total amount of electricity that the photovoltaic system can provide cannot meet the total amount of electricity demand, the energy management device monitors the operation status and power consumption of each device in real time, and adjusts the power distribution ratio of each device in real time.

[0019] Optionally, the energy management device monitors the operation status and power consumption of each device in real time, and adjusts the power distribution ratio of each device in real time, including:

[0020] Determine the importance of each device in the power distribution adjustment process based on the current mutual influence relationship between the devices and the irrigation task;

[0021] According to the order of importance, the water lifting device, the salt water desalination device and the drip irrigation system are respectively assigned corresponding priority weight coefficients;

[0022] Analyze the gap ratio between actual power generation and current total power demand;

[0023] Calculating the initial power distribution ratio of the water extraction device, the salt water desalination device and the drip irrigation system based on the priority weight coefficient;

[0024] The energy management device obtains the actual power generation of the photovoltaic system, the remaining power of the battery, and the latest real-time operation status and power consumption data of each device in real time;

[0025] Calculate the new recommended power distribution ratio for each device in real time based on the updated data;

[0026] The energy management device generates corresponding power distribution control instructions to the inverter according to the new power distribution ratio recommended value of each device.

[0027] Optionally, the water collection tank is provided with a water level monitoring device, and the water level monitoring device monitors the water level change of the water collection tank in real time; when the water level is lower than a preset value, the energy management device controls the water lifting device to start.

[0028] Optionally, the water lifting device is provided with a water flow monitoring and control unit, and the water flow monitoring and control unit includes a flow sensor and a flow rate sensor, the flow sensor is used to monitor the flow value of water lifting in real time, and the flow rate sensor is used to monitor the flow rate value of water lifting in real time, so as to obtain real-time water flow parameters in the water lifting process; the energy management device compares and analyzes the acquired real-time flow rate and flow rate data based on the expected values ​​of the flow rate and flow rate of water lifting in the corresponding period in the irrigation plan, calculates the difference between the real-time data and the expected value and the deviation ratio, and determines whether a deviation occurs; when it is determined that the real-time flow rate and flow rate data deviate from the expected value in the irrigation plan, a control instruction for controlling the operating power parameters of the water lifting device is generated based on the current degree of deviation; a power regulation actuator is provided inside the water lifting device, and the power regulation actuator adjusts the motor speed and valve opening of the water lifting device accordingly after receiving the control instruction.

[0029] Optionally, a self-cleaning device is provided on the surface of the photovoltaic panel, and the self-cleaning device includes an electric brush and a water spray nozzle. The electric brush periodically cleans the surface of the photovoltaic panel, and the water spray nozzle sprays water onto the surface of the photovoltaic panel to assist in cleaning.

[0030] Optionally, the photovoltaic panels are arranged above the reservoir to reduce the area of ​​the water surface exposed to direct sunlight.

[0031] Optionally, a water quality detection device is connected between the salt water desalination device and the water reservoir, and the water quality detection device detects water quality indicators of the desalinated water in real time; the water quality indicators include conductivity and pH. When the water quality indicators do not meet the irrigation standards, an alarm is issued in time and water supply to the water reservoir is stopped.

[0032] Optionally, a valve controller is installed in each irrigation area of ​​the drip irrigation system; the valve controller communicates with the energy management device; the energy management device calculates the irrigation water volume and irrigation time required for each irrigation area based on the crop water demand forecast, soil moisture monitoring results and irrigation plan, and sends irrigation instructions to the corresponding valve controller; after receiving the instructions, the valve controller controls the opening and closing time of the valve; the valve controller is electrically connected to a soil moisture sensor, which is used to monitor the moisture data of the soil in the corresponding area; the energy management device receives and analyzes the soil moisture data from each valve controller and combines it with meteorological data and crop growth stage to evaluate the current irrigation effect and adjust the irrigation plan.

[0033] Optionally, the energy management device receives and analyzes soil moisture data from each valve controller and combines it with meteorological data and crop growth stage to evaluate the current irrigation effect and adjust the irrigation plan, including:

[0034] The energy management device receives soil moisture data from each valve controller in real time, and simultaneously obtains real-time meteorological data and crop growth stage information provided by the weather station;

[0035] The energy management device evaluates the current irrigation effect based on data analysis algorithms and soil moisture data, real-time meteorological data, and crop growth stage information; the current irrigation effect includes analyzing the trend of soil moisture changes and the degree of deviation from the irrigation target;

[0036] Based on the result of the irrigation effect evaluation, the energy management device formulates an adjustment strategy for the irrigation plan; the adjustment strategy includes adjusting the irrigation water volume, irrigation time, irrigation frequency or the priority of the irrigation area;

[0037] Based on the adjustment strategy of the irrigation plan, the energy management device sends the adjustment instructions to the corresponding valve controller; the valve controller adjusts the opening and closing time of the valve according to the received adjustment instructions. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a system block diagram of an irrigation system based on solar power supply according to an embodiment of the present application;

[0039] In the figure, 101 is a reservoir; 102 is a photovoltaic system; 103 is a water collection tank; 104 is a desalination device; 105 is a drip irrigation system. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1 The present application is further described with specific embodiments:

[0041] First of all, it should be noted that in the description of this application, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and other directional words appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of this application; in addition, if the terms "first", "second", "third" and other numerical quantifiers appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", and "connected" appear, they should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, a limited connection such as an interference fit, a transition fit, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium; therefore, for ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0042] The present application embodiment discloses an irrigation system based on solar power supply, comprising:

[0043] Reservoir 101: The reservoir is used to store irrigation water. Specifically, the reservoir is used to store irrigation water. It can collect and store a certain amount of water so as to provide a stable water source for the drip irrigation system when irrigation is needed, thus playing the role of water reserve.

[0044] Photovoltaic system 102; the photovoltaic system includes photovoltaic panels, inverters, batteries and energy management devices. Specifically, the photovoltaic system consists of photovoltaic panels, inverters, batteries and energy management devices. Among them, photovoltaic panels are components that convert solar energy into direct current; the function of the inverter is to convert the direct current generated by the photovoltaic panels into alternating current for use by other electrical equipment; the battery is used to store electrical energy to ensure continuous power supply even in conditions such as insufficient light; the energy management device is responsible for managing and regulating the power distribution of the entire system.

[0045] The water collection tank 103 is connected to a water extraction device, which is used to extract water from a groundwater well. Specifically, the water collection tank is a tank mainly used to collect water from a groundwater well, and collects water extracted from a groundwater well by the water extraction device.

[0046] The salt water desalination device 104 is used to desalinate the water in the water collection tank and transport the desalinated water to the water storage tank. Specifically, the salt water desalination device is used to treat water with high salt content, remove salt and other impurities therein, and turn it into fresh water that can be used for irrigation.

[0047] Drip irrigation system 105; the drip irrigation system obtains desalinated water from the water reservoir for drip irrigation;

[0048] Wherein, the water extraction device, the salt water desalination device and the drip irrigation system are powered by the inverter;

[0049] The energy management device receives soil moisture information collected by the soil moisture sensor and receives meteorological data from the meteorological station; determines the water requirement of the crop in the current time period according to the crop type and growth stage; calculates the required irrigation amount and formulates an irrigation plan based on the soil moisture, meteorological data and crop water requirement; and adjusts the power distribution of the photovoltaic system according to the irrigation plan.

[0050] Specifically, the photovoltaic system converts solar energy into electrical energy, which solves the power supply problem of the irrigation system and reduces dependence on traditional energy sources. The energy management device determines the water requirement of crops based on the soil moisture information collected by the soil moisture sensor and the meteorological data of the meteorological station, combined with the crop type and growth stage, to formulate an irrigation plan and adjust the power distribution of the photovoltaic system according to the plan, ensuring that the entire irrigation system can efficiently irrigate crops under different environmental conditions and guaranteeing the implementation of the irrigation plan.

[0051] As a specific implementation of a solar-powered irrigation system, adjusting the power distribution of a photovoltaic system according to an irrigation plan includes:

[0052] Based on the irrigation plan, the power and duration required for the drip irrigation system, the water lifting device, and the salt water desalination device to operate during the irrigation operation are obtained, and the total power demand during the execution of the irrigation plan is obtained;

[0053] Evaluate the power generation capacity of the photovoltaic system based on the current light intensity and the power generation efficiency of the photovoltaic panels, and determine the total amount of power that can be provided and the power distribution based on the battery storage reserve;

[0054] When the total amount of electricity that the photovoltaic system can provide cannot meet the total amount of electricity demand, the energy management device monitors the operation status and power consumption of each device in real time, and adjusts the power distribution ratio of each device in real time.

[0055] Specifically, based on the irrigation plan, the power and duration required for the drip irrigation system, water lifting device, and desalination device to operate during irrigation operations are accurately calculated, and the total power demand during the execution of the entire irrigation plan is obtained. The power generation capacity of the photovoltaic system is evaluated based on the current light intensity and the power generation efficiency of the photovoltaic panels, and the total power that can be provided and the power distribution are obtained in combination with the storage power reserve of the battery. When the total power that the photovoltaic system can provide is difficult to meet the total power demand, the energy management device can monitor the operation and power consumption of each device in real time, and dynamically adjust the power distribution ratio of each device to avoid problems such as the inability of irrigation equipment to operate normally due to insufficient power or excessive energy consumption of some equipment, and ensure that under different lighting conditions and equipment operating conditions, each irrigation-related equipment can obtain power as much as possible on demand to ensure the continuity and stability of irrigation work.

[0056] As a specific implementation of a solar-powered irrigation system, the energy management device monitors the operation status and power consumption of each device in real time and adjusts the power distribution ratio of each device in real time, including:

[0057] Determine the importance of each device in the power distribution adjustment process based on the current mutual influence relationship between the devices and the irrigation task;

[0058] According to the order of importance, the water lifting device, the salt water desalination device and the drip irrigation system are respectively assigned corresponding priority weight coefficients;

[0059] Analyze the gap ratio between actual power generation and current total power demand;

[0060] Calculating the initial power distribution ratio of the water extraction device, the salt water desalination device and the drip irrigation system based on the priority weight coefficient;

[0061] The energy management device obtains the actual power generation of the photovoltaic system, the remaining power of the battery, and the latest real-time operation status and power consumption data of each device in real time;

[0062] Calculate the new recommended power distribution ratio for each device in real time based on the updated data;

[0063] The energy management device generates corresponding power distribution control instructions to the inverter according to the new power distribution ratio recommended value of each device.

[0064] Specifically, the energy management device determines the order of importance of each device in the power distribution adjustment process in combination with the current mutual influence relationship between each device and the irrigation task; based on the order of importance, the water lifting device, the salt water desalination device and the drip irrigation system are assigned corresponding priority weight coefficients. After obtaining the difference ratio between the actual power generation and the current total power demand, the initial power distribution ratio is calculated based on the priority weight coefficient. The energy management device obtains the actual power generation of the photovoltaic system, the remaining power of the battery, and the latest real-time operation and power consumption data of each device in real time, and calculates the new power distribution ratio recommended value of each device again based on the real-time updated data. The entire power distribution can be flexibly adjusted with the dynamic changes of the actual operation of the system. The energy management device generates the corresponding power distribution control command to the inverter according to the new power distribution ratio recommended value, ensures the orderly operation of each irrigation equipment, avoids the problem of some equipment failing to operate normally due to unreasonable power distribution, and affects the irrigation task, and makes the best use of limited power resources to maintain the stable operation of the entire irrigation system.

[0065] As a specific implementation of an irrigation system based on solar power supply, the water collection tank is provided with a water level monitoring device, and the water level monitoring device monitors the water level changes in the water collection tank in real time; when the water level is lower than a preset value, the energy management device controls the water lifting device to start.

[0066] As one of the implementation methods of an irrigation system based on solar power supply, a water flow monitoring and control unit is provided in the water lifting device, and the water flow monitoring and control unit includes a flow sensor and a flow rate sensor, the flow sensor is used to monitor the flow value of water lifting in real time, and the flow rate sensor is used to monitor the flow rate value of water lifting in real time, so as to obtain real-time water flow parameters in the water lifting process; the energy management device compares and analyzes the acquired real-time flow rate and flow rate data based on the expected values ​​of the flow rate and flow rate of water lifting in the corresponding period in the irrigation plan, calculates the difference between the real-time data and the expected value and the deviation ratio, and determines whether a deviation occurs; when it is determined that the real-time flow rate and flow rate data deviate from the expected value in the irrigation plan, a control instruction for controlling the operating power parameters of the water lifting device is generated based on the current degree of deviation; a power adjustment actuator is provided inside the water lifting device, and the power adjustment actuator adjusts the motor speed and valve opening of the water lifting device accordingly after receiving the control instruction.

[0067] As one embodiment of an irrigation system based on solar power supply, a self-cleaning device is arranged on the surface of the photovoltaic panel, and the self-cleaning device includes an electric brush and a water spray nozzle. The electric brush regularly cleans the surface of the photovoltaic panel, and the water spray nozzle sprays water onto the surface of the photovoltaic panel to assist in cleaning.

[0068] As one implementation of a solar-powered irrigation system, the photovoltaic panel is arranged above a reservoir to reduce the area of ​​the water surface exposed to direct sunlight.

[0069] As one of the implementation methods of the solar-powered irrigation system, a water quality detection device is connected between the salt water desalination device and the water reservoir, and the water quality detection device detects the water quality indicators of the desalinated water in real time; the water quality indicators include conductivity and pH. When the water quality indicators do not meet the irrigation standards, an alarm is issued in time and water supply to the water reservoir is stopped.

[0070] As one of the implementation methods of an irrigation system powered by solar energy, a valve controller is installed in each irrigation area of ​​the drip irrigation system; the valve controller communicates with the energy management device; the energy management device calculates the irrigation water volume and irrigation time required for each irrigation area based on the crop water demand forecast, soil moisture monitoring results and irrigation plan, and sends irrigation instructions to the corresponding valve controller; after receiving the instructions, the valve controller controls the opening and closing time of the valve; the valve controller is electrically connected to a soil moisture sensor, which is used to monitor the moisture data of the soil in the corresponding area; the energy management device receives and analyzes the soil moisture data from each valve controller and combines it with meteorological data and crop growth stage to evaluate the current irrigation effect and adjust the irrigation plan.

[0071] Specifically, a valve controller is installed in each irrigation area of ​​the drip irrigation system, and the valve controller communicates with the energy management device. The energy management device can calculate the irrigation water volume and irrigation time required for each irrigation area based on the crop water demand forecast, soil moisture monitoring results and irrigation plan, and send irrigation instructions to the corresponding valve controller, thereby avoiding waste of water resources; the soil moisture sensor connected to the valve controller monitors the soil moisture data of the corresponding area in real time, and the energy management device receives and analyzes this data, combines meteorological data and crop growth stage to evaluate the current irrigation effect, and then adjusts the irrigation plan to ensure that crops can obtain appropriate moisture at different growth stages, which is beneficial to crop growth and improves crop yield and quality.

[0072] As one implementation of a solar-powered irrigation system, the energy management device receives and analyzes soil moisture data from each valve controller and combines it with meteorological data and crop growth stage to evaluate the current irrigation effect and adjust the irrigation plan, including:

[0073] The energy management device receives soil moisture data from each valve controller in real time, and simultaneously obtains real-time meteorological data and crop growth stage information provided by the weather station;

[0074] The energy management device evaluates the current irrigation effect based on data analysis algorithms and soil moisture data, real-time meteorological data, and crop growth stage information; the current irrigation effect includes analyzing the trend of soil moisture changes and the degree of deviation from the irrigation target;

[0075] Based on the result of the irrigation effect evaluation, the energy management device formulates an adjustment strategy for the irrigation plan; the adjustment strategy includes adjusting the irrigation water volume, irrigation time, irrigation frequency or the priority of the irrigation area;

[0076] Based on the adjustment strategy of the irrigation plan, the energy management device sends the adjustment instructions to the corresponding valve controller; the valve controller adjusts the opening and closing time of the valve according to the received adjustment instructions.

[0077] Specifically, the energy management device receives soil moisture data from each valve controller in real time, and obtains real-time meteorological data and crop growth stage information provided by the meteorological station at the same time. It conducts a comprehensive analysis of these data based on the data analysis algorithm to evaluate the current irrigation effect, including clarifying the changing trend of soil moisture and the degree of deviation from the irrigation target. Based on the evaluation results, the energy management device formulates an adjustment strategy for the irrigation plan, whether it is adjusting the irrigation water volume to meet the crop's demand for water, or changing the irrigation time and frequency to adapt to different meteorological conditions and crop growth stages, or adjusting the priority of the irrigation area to ensure that limited water resources are given priority to the areas that need it most; the energy management device sends the adjustment instructions to the corresponding valve controller, and the valve controller adjusts the opening and closing time of the valve accordingly; the accuracy of irrigation is improved, the excessive use or uneven distribution of water resources is avoided, water resources are effectively saved, the operating efficiency of the entire irrigation system is improved, and the green energy-saving advantages of solar power supply are fully utilized to achieve sustainable and efficient irrigation.

[0078] It should be noted that the above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although the present application has been described in detail in this specification with reference to the above embodiments, a person of ordinary skill in the art should understand that a person of ordinary skill in the art can still modify or make equivalent substitutions to the present application, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. A solar-powered irrigation system, characterized in that: include: A water reservoir; the water reservoir is used to store irrigation water; Photovoltaic systems; The photovoltaic system includes photovoltaic panels, inverters, batteries and energy management devices; catch basin; The water collection tank is connected to a water extraction device; the water extraction device is used to extract water from a groundwater well; A salt water desalination device; the salt water desalination device is used to desalinate the water in the water collection tank and transport the desalinated water to the water storage tank; Drip irrigation system; the drip irrigation system obtains desalinated water from the water reservoir for drip irrigation; Wherein, the water extraction device, the salt water desalination device and the drip irrigation system are powered by the inverter; The energy management device receives soil moisture information collected by the soil moisture sensor and receives meteorological data from the meteorological station; determines the water requirement of the crop in the current time period according to the crop type and growth stage; calculates the required irrigation amount and formulates an irrigation plan based on the soil moisture, meteorological data and crop water requirement; and adjusts the power distribution of the photovoltaic system according to the irrigation plan.

2. The solar-powered irrigation system according to claim 1, characterized in that: Adjust the power distribution of the photovoltaic system according to the irrigation plan, including: Based on the irrigation plan, the power and duration required for the drip irrigation system, the water lifting device, and the salt water desalination device to operate during the irrigation operation are obtained, and the total power demand during the execution of the irrigation plan is obtained; Evaluate the power generation capacity of the photovoltaic system based on the current light intensity and the power generation efficiency of the photovoltaic panels, and determine the total amount of power that can be provided and the power distribution based on the battery storage reserve; When the total amount of electricity that the photovoltaic system can provide cannot meet the total amount of electricity demand, the energy management device monitors the operation status and power consumption of each device in real time, and adjusts the power distribution ratio of each device in real time.

3. The solar-powered irrigation system according to claim 2, characterized in that: The energy management device monitors the operation status and power consumption of each device in real time, and adjusts the power distribution ratio of each device in real time, including: Determine the importance of each device in the power distribution adjustment process based on the current mutual influence relationship between the devices and the irrigation task; According to the order of importance, the water lifting device, the salt water desalination device and the drip irrigation system are respectively assigned corresponding priority weight coefficients; Analyze the gap ratio between actual power generation and current total power demand; Calculating the initial power distribution ratio of the water extraction device, the salt water desalination device and the drip irrigation system based on the priority weight coefficient; The energy management device obtains the actual power generation of the photovoltaic system, the remaining power of the battery, and the latest real-time operation status and power consumption data of each device in real time; Calculate the new recommended power distribution ratio for each device in real time based on the updated data; The energy management device generates corresponding power distribution control instructions to the inverter according to the new power distribution ratio recommended value of each device.

4. The solar-powered irrigation system according to claim 3, characterized in that: The water collection tank is provided with a water level monitoring device, and the water level monitoring device monitors the water level change of the water collection tank in real time; when the water level is lower than a preset value, the energy management device controls the water lifting device to start.

5. The solar-powered irrigation system according to claim 4, characterized in that: The water pumping device is provided with a water flow monitoring and control unit, which includes a flow sensor and a flow velocity sensor. The flow sensor is used to monitor the flow value of water pumping in real time, and the flow velocity sensor is used to monitor the flow velocity value of water pumping in real time, so as to obtain the real-time water flow parameters in the water pumping process; The energy management device compares and analyzes the acquired real-time flow rate and flow rate data based on the expected values ​​of flow rate and flow rate of water pumping in the corresponding period in the irrigation plan, calculates the difference between the real-time data and the expected value and the deviation ratio, and determines whether a deviation occurs; when it is determined that the real-time flow rate and flow rate data deviate from the expected value in the irrigation plan, a control instruction for adjusting the operating power parameters of the water pumping device is generated based on the current degree of deviation; a power adjustment actuator is arranged inside the water pumping device, and after receiving the control instruction, the power adjustment actuator adjusts the motor speed and valve opening of the water pumping device accordingly.

6. The solar-powered irrigation system according to claim 5, characterized in that: A self-cleaning device is arranged on the surface of the photovoltaic panel, and the self-cleaning device comprises an electric brush and a water spray nozzle. The electric brush regularly cleans the surface of the photovoltaic panel, and the water spray nozzle sprays water on the surface of the photovoltaic panel to assist in cleaning.

7. The solar-powered irrigation system according to claim 6, characterized in that: The photovoltaic panels are arranged above the water reservoir to reduce the area of ​​the water surface directly exposed to sunlight.

8. The solar-powered irrigation system according to claim 7, characterized in that: A water quality detection device is connected between the salt water desalination device and the water reservoir. The water quality detection device detects the water quality indicators of the desalinated water in real time; the water quality indicators include conductivity and pH. When the water quality indicators do not meet the irrigation standards, an alarm is issued in time and water supply to the water reservoir is stopped.

9. The solar-powered irrigation system according to claim 8, characterized in that: A valve controller is installed in each irrigation area of ​​the drip irrigation system; the valve controller communicates with the energy management device; the energy management device calculates the irrigation water volume and irrigation time required for each irrigation area according to the crop water demand forecast, soil moisture monitoring results and irrigation plan, and sends irrigation instructions to the corresponding valve controller; after receiving the instructions, the valve controller controls the opening and closing time of the valve; the valve controller is electrically connected to a soil moisture sensor, which is used to monitor the moisture data of the soil in the corresponding area; the energy management device receives and analyzes the soil moisture data from each valve controller and combines it with meteorological data and crop growth stage to evaluate the current irrigation effect and adjust the irrigation plan.

10. The solar-powered irrigation system according to claim 9, characterized in that: The energy management device receives and analyzes soil moisture data from each valve controller and combines it with meteorological data and crop growth stage to evaluate the current irrigation effect and adjust the irrigation plan, including: The energy management device receives soil moisture data from each valve controller in real time, and simultaneously obtains real-time meteorological data and crop growth stage information provided by the weather station; The energy management device evaluates the current irrigation effect based on data analysis algorithms and soil moisture data, real-time meteorological data, and crop growth stage information; the current irrigation effect includes analyzing the trend of soil moisture changes and the degree of deviation from the irrigation target; Based on the result of the irrigation effect evaluation, the energy management device formulates an adjustment strategy for the irrigation plan; the adjustment strategy includes adjusting the irrigation water volume, irrigation time, irrigation frequency or the priority of the irrigation area; Based on the adjustment strategy of the irrigation plan, the energy management device sends the adjustment instructions to the corresponding valve controller; the valve controller adjusts the opening and closing time of the valve according to the received adjustment instructions.

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