Mountain photovoltaic power generation irrigation and precise spraying cleaning operation and maintenance system and method

Abstract

The invention discloses a mountain photovoltaic power generation irrigation and precise spraying cleaning operation and maintenance system and method, and belongs to the technical field of photovoltaic irrigation. S1, related information data is acquired based on a data acquisition system; s2, a plant growth water demand model is constructed through the related information data, and then the irrigation water amount is calculated; s3, constructing a photovoltaic degradation model, and determining power deviation; s4, based on the dust thickness and the power deviation of the photovoltaic panel, the cleaning strength and the cleaning water amount are determined; s5, formulating an irrigation cleaning strategy by considering future precipitation, irrigation water, cleaning water, dust thickness and power deviation; by comparing the difference between the actual photovoltaic power generation efficiency and the theoretical photovoltaic power generation efficiency in the environment, the cleaning model is divided into three stages, impurities on a photovoltaic panel can be effectively cleaned, the output demand of an irrigation system is determined by judging the water demand of irrigating crops and the cleaning water spraying amount, and the cleaning efficiency is improved. Therefore, the irrigation system can accurately clean the photovoltaic power generation system and irrigate surrounding crops at the same time.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic irrigation, and specifically relates to a mountain photovoltaic power generation irrigation and precise spraying, cleaning, operation and maintenance system and method. Background Art

[0002] Mountain photovoltaic power generation systems are green energy projects that directly convert solar energy into electrical energy using the photovoltaic effect. With the transformation of the global energy structure and the increasing severity of climate change issues, photovoltaic power generation, as a clean and renewable energy form, is gradually becoming an important way to replace traditional fossil fuels. By building photovoltaic power generation systems, sustainable energy support can be provided for regional economic development, while environmental pressure can be alleviated and green development can be promoted. With the acceleration of the industrialization process and population growth, energy demand is constantly increasing, and the development and utilization of traditional fossil fuels have brought serious environmental problems such as air pollution and greenhouse gas emissions. As a clean energy source, the development and utilization of photovoltaic power generation are of great significance for alleviating energy shortages and environmental pressure. In addition, photovoltaic power generation also has characteristics such as distribution and high storage flexibility, and can effectively supplement the power grid. In recent years, significant progress has been made in photovoltaic technology, with continuously increasing photoelectric conversion efficiency and gradually decreasing manufacturing costs. At the same time, with the rapid development of fields such as smart grids and energy storage technologies, remarkable progress has also been made in aspects such as grid connection and operation management of photovoltaic power generation systems. These technological achievements provide strong support for the implementation of photovoltaic power generation projects, making them more feasible and economically beneficial.

[0003] As a general rotating machinery, pump irrigation systems have been widely used in various industries. However, the establishment of mountain photovoltaic power generation systems has also brought great challenges. The mountainous terrain is rough and uneven, and it is time-consuming and laborious to clean the photovoltaic panels in mountain photovoltaic power generation systems. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a mountain photovoltaic power generation irrigation and precise spraying, cleaning, operation and maintenance method, including:

[0005] S1. Obtain relevant information data based on a data acquisition system;

[0006] S2. Construct a plant water demand model based on the relevant information data, and then calculate the irrigation water volume;

[0007] S3. Construct a photovoltaic degradation model to determine the power deviation;

[0008] S4. Determine the cleaning intensity and cleaning water volume based on the dust thickness and power deviation of the photovoltaic panel;

[0009] S5. Develop an irrigation and cleaning strategy considering future precipitation, irrigation water volume, cleaning water volume, dust thickness and power deviation.

[0010] Preferably, the relevant information data includes the water volume required at the initial stage of plant growth, soil layer loss, environmental evaporation water volume, precipitation, photovoltaic panel dust thickness, rated photovoltaic power generation, actual photovoltaic power generation, future precipitation intensity, and future precipitation volume.

[0011] Preferably, the water demand model for plant growth is specifically shown as the following formula:

[0012] Q crop = Q0·ψ(t);

[0013] Wherein, Q0 is the water volume required at the initial stage of plant growth, and ψ(t) is the water demand coefficient of the plant at different stages compared to the initial stage during the growth process with respect to time t.

[0014] Preferably, the irrigation water volume is specifically shown as the following formula:

[0015] Q irr = Q crop + Q s - Q p ;

[0016] Wherein, Q p is the precipitation, and Q s is the water volume of soil layer loss and environmental evaporation.

[0017] Preferably, the photovoltaic degradation model is specifically shown as the following formula:

[0018] P pv0 (t) = h(t)·P pvn ;

[0019] Wherein, P pvn is the rated photovoltaic power generation, and h(t) is the degradation factor varying with time.

[0020] Preferably, the power deviation is specifically shown as the following formula:

[0021]

[0022] Wherein, P pv is the current photovoltaic power generation.

[0023] Preferably, the cleaning intensity is specifically expressed as:

[0024]

[0025] Wherein, γ1 is the first threshold set for the photovoltaic panel dust thickness, γ2 is the second threshold set for the photovoltaic panel dust thickness, γ is the photovoltaic panel dust thickness, and f is the function relationship between the photovoltaic panel dust thickness and the cleaning intensity.

[0026] Preferably, the cleaning water volume is specifically expressed as:

[0027]

[0028] wherein, δ1 is the first threshold value set for power deviation, δ2 is the second threshold value set for power deviation, and g is the functional relationship between the photovoltaic power deviation and the cleaning water volume.

[0029] Preferably, the irrigation and cleaning strategy includes: judging whether it is necessary to clean the photovoltaic panels according to the future precipitation, irrigation water volume, cleaning water volume, dust thickness and power deviation;

[0030] Sa. Considering the cleaning task based on the dust thickness and power deviation, and only when both the dust thickness and power deviation are greater than or equal to the set threshold values, the cleaning task is considered;

[0031] Sb. Based on the above Sa, if there is precipitation within the set future time period, judge whether both the future precipitation intensity and future precipitation volume are greater than or equal to the current required cleaning intensity and cleaning water volume. Only when both the future precipitation intensity and future precipitation volume are greater than or equal to the current required cleaning intensity and cleaning water volume, the cleaning task is not considered;

[0032] Sc. Based on the above Sb, judge the relationship between the irrigation water volume and the cleaning water volume, determine the irrigation water volume and irrigation duration according to the water demand for crop growth. If the cleaning water volume is greater than the irrigation water volume, control the pump speed, valves and nozzles according to the cleaning intensity and cleaning water volume required for cleaning to perform the cleaning operation;

[0033] Sd. If the irrigation water volume is greater than or equal to the cleaning water volume, first perform the cleaning operation according to the cleaning task. After the cleaning operation is completed, mainly perform the irrigation operation, and re-adjust the pump speed, valves and nozzles to perform the irrigation;

[0034] If the irrigation water volume is less than the cleaning water volume, perform the cleaning operation according to the cleaning task;

[0035] Se. Monitor and control the system in real time with the set time period as the unit cycle to complete the irrigation and cleaning operation and maintenance work.

[0036] On the other hand, a mountain photovoltaic power generation irrigation and precise spraying cleaning operation and maintenance system, applicable to the above-mentioned mountain photovoltaic power generation irrigation and precise spraying cleaning operation and maintenance method, includes a photovoltaic power generation system, an irrigation system, a data acquisition system and a data analysis system;

[0037] The photovoltaic power generation system includes a power generation system composed of physical power generation structures;

[0038] The irrigation system includes a water supply system composed of a water pump, pipelines and nozzles;

[0039] The data acquisition system is used to collect sensor signals in the photovoltaic power generation system and the irrigation system;

[0040] The data analysis system is used to process the sensor signals collected by the data acquisition system.

[0041] Advantages of the present invention:

[0042] 1. By comparing the difference between the actual photovoltaic power generation efficiency and the theoretical photovoltaic power generation efficiency in this environment, the cleaning model is divided into three stages, which can effectively clean the impurities on the photovoltaic panel. By judging the water demand of irrigated crops and the cleaning water spray volume, the output demand of the irrigation system is determined, so as to realize the precise cleaning of the photovoltaic power generation system by the irrigation system and irrigate the surrounding crops at the same time. Description of the drawings

[0043] Figure 1 is the overall block diagram of the present invention;

[0044] Figure 2 is the schematic diagram of the method flow of the present invention. Detailed implementation manners

[0045] Example 1: As Figure 1 shown, a method for photovoltaic power generation irrigation and precise spraying cleaning and operation and maintenance on mountains includes:

[0046] S1. Obtain relevant information data based on the data acquisition system;

[0047] S2. Construct a water demand model for plant growth through the relevant information data, and then calculate the irrigation water volume;

[0048] S3. Construct a photovoltaic degradation model to determine the power deviation;

[0049] S4. Determine the cleaning intensity and cleaning water volume based on the dust thickness of the photovoltaic panel and the power deviation;

[0050] S5. Consider the future precipitation, irrigation water volume, cleaning water volume, dust thickness and power deviation, and formulate an irrigation and cleaning strategy.

[0051] Specifically, the relevant information data includes the water volume required at the initial stage of plant growth, soil layer loss and environmental evaporation water volume, precipitation, dust thickness of the photovoltaic panel, rated photovoltaic power generation power, actual photovoltaic power generation power, future precipitation intensity and future precipitation volume.

[0052] Specifically, the water demand model for plant growth is specifically shown as the following formula:

[0053] Q crop = Q0·ψ(t);

[0054] Among them, Q0 is the water volume required at the initial stage of plant growth, and ψ(t) is the water demand coefficient of the plant at different stages compared with the initial stage during the growth process over time t.

[0055] Specifically, the irrigation water volume is shown as follows:

[0056] Q irr =Q crop +Q s -Q p ;

[0057] Among them, Q p is the precipitation, and Q s is the water volume lost in the soil layer and evaporated by the environment.

[0058] Specifically, the photovoltaic degradation model is shown as follows:

[0059] P pv0 (t)=h(t)·P pvn ;

[0060] Among them, P pvn is the rated photovoltaic power generation power, and h(t) is the degradation factor varying with time.

[0061] Specifically, the power deviation is shown as follows:

[0062]

[0063] Among them, P pv is the current photovoltaic power generation power.

[0064] Specifically, the cleaning intensity is specifically expressed as:

[0065]

[0066] Among them, γ1 is the first threshold set for the dust thickness of the photovoltaic panel, γ2 is the second threshold set for the dust thickness of the photovoltaic panel, γ is the dust thickness of the photovoltaic panel, and f is the functional relationship between the dust thickness of the photovoltaic panel and the cleaning intensity.

[0067] Specifically, the cleaning water volume is specifically expressed as:

[0068]

[0069] Among them, δ1 is the first threshold set for the power deviation, δ2 is the second threshold set for the power deviation, and g is the functional relationship between the photovoltaic power deviation and the cleaning water volume.

[0070] Specifically, the irrigation and cleaning strategy includes: judging whether it is necessary to clean the photovoltaic panel according to the future precipitation, irrigation water volume, cleaning water volume, dust thickness, and power deviation;

[0071] Sa. Consider the cleaning task based on the dust thickness and power deviation. Only when both the dust thickness and power deviation are greater than or equal to the set thresholds, consider the cleaning task;

[0072] Sb. Based on Sa above, if there is precipitation within the set future time period, determine whether both the future precipitation intensity and future precipitation amount are greater than or equal to the current required cleaning intensity and cleaning water volume. Only when both the future precipitation intensity and future precipitation amount are greater than or equal to the current required cleaning intensity and cleaning water volume, do not consider the cleaning task;

[0073] Sc. Based on Sb above, judge the relationship between the irrigation water volume and the cleaning water volume, determine the irrigation water volume and irrigation duration according to the water demand of crop growth. If the cleaning water volume is greater than the irrigation water volume, control the pump speed, valves, and nozzles according to the cleaning intensity and cleaning water volume required for cleaning to perform the cleaning operation;

[0074] Sd. If the irrigation water volume is greater than or equal to the cleaning water volume, first perform the cleaning operation according to the cleaning task. Then, after completing the cleaning operation, mainly focus on the irrigation operation and readjust the pump speed, valves, and nozzles to perform irrigation;

[0075] If the irrigation water volume is less than the cleaning water volume, perform the cleaning operation according to the cleaning task;

[0076] Se. Real-time monitor and control the system in units of set time periods to complete the irrigation and cleaning operation and maintenance work.

[0077] The logic inside is to first judge whether to clean. If not, perform the irrigation task. If cleaning is required, first judge the meteorological factors. If the meteorological factors meet the cleaning requirements, do not consider the cleaning task. If the meteorological data does not meet the cleaning task, consider the spraying cleaning task. At this time, overall plan the irrigation task. If the cleaning task meets the irrigation task, perform the operation according to the cleaning requirements. If not, first perform the cleaning task and then consider the irrigation task.

[0078] Specifically, if both the dust thickness and power deviation are less than the set thresholds, or the dust thickness is less than the set threshold and the power deviation is greater than the set threshold, or the dust thickness is greater than the set threshold and the power deviation is less than the set threshold, none of the above three situations will perform the cleaning task. Only when both the dust thickness and power deviation are greater than or equal to the set thresholds, consider cleaning.

[0079] When performing the cleaning task, determine whether it rains or not. If there is precipitation within the set future time period, then determine whether both the future precipitation intensity and the future precipitation amount are greater than or equal to the current required cleaning intensity and cleaning water volume. When the future precipitation intensity is greater than the cleaning intensity and cleaning water volume, and the future precipitation amount is less than the current required cleaning intensity and cleaning water volume, or when the future precipitation intensity is less than the cleaning intensity and cleaning water volume, and the future precipitation amount is greater than the current required cleaning intensity and cleaning water volume, or when the future precipitation intensity is less than the cleaning intensity and cleaning water volume, and the future precipitation amount is less than the current required cleaning intensity and cleaning water volume, the cleaning task is considered. Only when both the future precipitation intensity and the future precipitation amount are greater than the current required cleaning intensity and cleaning water volume, the cleaning task is not considered.

[0080] Finally, consider the irrigation task. Determine the irrigation water volume and irrigation duration according to the water demand of crop growth. If the cleaning water volume is greater than the irrigation water volume, then control the pump speed, valves, and nozzles according to the cleaning intensity and cleaning water volume required for cleaning to perform the cleaning operation;

[0081] If the irrigation water volume is greater than or equal to the cleaning water volume, then first perform the cleaning operation according to the cleaning task. After completing the cleaning operation, mainly perform the irrigation operation, and re-adjust the pump speed, valves, and nozzles to perform irrigation; if the irrigation water volume is less than the cleaning water volume, then perform the cleaning operation according to the cleaning task.

[0082] On the other hand, a mountain photovoltaic power generation irrigation and precise spraying cleaning operation and maintenance system is applicable to the above-mentioned mountain photovoltaic power generation irrigation and precise spraying cleaning operation and maintenance method, and includes a photovoltaic power generation system, an irrigation system, a data acquisition system, and a data analysis system;

[0083] The photovoltaic power generation system includes a power generation system composed of a physical power generation structure, a power generation system composed of solar panels, a solar controller, an inverter, a support structure, etc.; Solar panels: perform energy conversion in the system; Solar controller: perform power regulation and maximum power point tracking in the photovoltaic power generation system; Inverter: convert the direct current generated in the solar panels into alternating current; Support structure: used to fix and install the solar panels to ensure that they receive sunlight to the greatest extent.

[0084] The irrigation system includes a water supply system composed of a water pump, a pipeline, and a nozzle; Water pump: pump the liquid from a place with a lower terrain to a higher place in the mountain for water supply; Pipeline system: used to configure and connect various components; Nozzle: adjust the size of the water flow and the spraying direction.

[0085] The data acquisition system is responsible for collecting the signals collected by various sensors in the photovoltaic power generation system and the irrigation system; the illuminance sensor: used to collect the light intensity in the photovoltaic power generation system; the thermistor sensor: used to collect the temperature of the photovoltaic panel; the pressure sensor: used to collect the inlet and outlet pressures of each pump in the irrigation system; the flow sensor: used to collect the flow rate in the irrigation system; the humidity sensor: used to collect the soil humidity of the crops; the electric valve: used to collect the signal of the opening degree of each valve; the frequency converter: used to collect the frequency signal in the system.

[0086] The data analysis system is used to process the sensor signals collected by the data acquisition system.

[0087] The present invention collects the electric energy signal in the photovoltaic power generation system, transmits it into the data acquisition system and the data analysis system through the sensor, compares the actual photovoltaic power generation efficiency and the theoretical photovoltaic power generation efficiency, divides the cleaning process into a three-stage model, precisely cleans the photovoltaic power generation system through the irrigation system, and at the same time irrigates the surrounding crops, effectively solving the problems of difficult cleaning and high cost of mountain photovoltaic systems.

Claims

1. A method for mountain photovoltaic power generation irrigation, precise spraying cleaning, operation and maintenance, characterized in that, It includes the following steps: S1. Obtain relevant information data based on the data acquisition system; S2. Construct a water requirement model for plant growth through the relevant information data, and then calculate the irrigation water volume; S3. Construct a photovoltaic degradation model and determine the power deviation; S4. Determine the cleaning intensity and cleaning water volume based on the dust thickness of the photovoltaic panel and the power deviation; S5. Consider the future precipitation, irrigation water volume, cleaning water volume, dust thickness and power deviation, and formulate an irrigation and cleaning strategy.

2. The mountain photovoltaic power generation irrigation and precise spraying cleaning operation and maintenance system and method according to claim 1, characterized in that The relevant information data includes the water volume required at the initial stage of plant growth, soil layer loss and environmental evaporation water volume, precipitation, dust thickness of the photovoltaic panel, rated photovoltaic power generation power, actual photovoltaic power generation power, future precipitation intensity and future precipitation volume.

3. A method for mountain photovoltaic power generation irrigation, precise spraying cleaning, operation and maintenance according to claim 2, characterized in that, The water requirement model for plant growth is specifically shown as the following formula: Q crop = Q0·ψ(t); Among them, Q0 is the water volume required at the initial stage of plant growth, and ψ(t) is the water requirement coefficient of the plant at different stages during the growth process with respect to the initial stage over time t.

4. A method for mountain photovoltaic power generation irrigation, precise spraying cleaning, operation and maintenance according to claim 3, characterized in that, The irrigation water volume is specifically shown as the following formula: Q irr = Q crop + Q s - Q p ; Among them, Q p is the precipitation, and Q s is the amount of water lost from the soil layer and environmental evaporation.

5. A method for mountain photovoltaic power generation irrigation, precise spraying cleaning, operation and maintenance according to claim 1, characterized in that The photovoltaic degradation model is specifically shown as the following formula: P pv0 (t) = h(t)·P pvn ; where P pvn is the rated photovoltaic power generation, and h(t) is the degradation factor varying with time.

6. A method for mountain photovoltaic power generation irrigation, precise spraying cleaning, operation and maintenance according to claim 5, characterized in that, The power deviation is specifically shown as the following formula: Among them, P pv is the current photovoltaic power generation power.

7. A method for mountain photovoltaic power generation irrigation, precise spraying cleaning, operation and maintenance according to claim 1, characterized in that, The cleaning intensity is specifically expressed as: Among them, γ1 is the first threshold set for the dust thickness of the photovoltaic panel, γ2 is the second threshold set for the dust thickness of the photovoltaic panel, γ is the dust thickness of the photovoltaic panel, and f is the function relationship between the dust thickness of the photovoltaic panel and the cleaning intensity.

8. A method for mountain photovoltaic power generation irrigation, precise spraying cleaning, operation and maintenance according to claim 1, characterized in that The cleaning water volume is specifically expressed as: Among them, δ1 is the first threshold set for the power deviation, δ2 is the second threshold set for the power deviation, and g is the function relationship between the photovoltaic power deviation and the cleaning water volume.

9. A method for mountain photovoltaic power generation irrigation, precise spraying cleaning, operation and maintenance according to claim 1, characterized in that, The irrigation and cleaning strategy includes: judging whether it is necessary to clean the photovoltaic panel according to the future precipitation, irrigation water volume, cleaning water volume, dust thickness and power deviation; Sa. Consider the cleaning task based on the dust thickness and power deviation. Only when both the dust thickness and the power deviation are greater than or equal to the set thresholds, consider the cleaning task; Sb. Based on the above Sa, if there is precipitation within the future set time period, judge whether both the future precipitation intensity and the future precipitation volume are greater than or equal to the current required cleaning intensity and cleaning water volume. Only when both the future precipitation intensity and the future precipitation volume are greater than or equal to the current required cleaning intensity and cleaning water volume, do not consider the cleaning task; Sc. Based on the above Sb, judge the relationship between the irrigation water volume and the cleaning water volume, determine the irrigation water volume and irrigation duration according to the water requirement of crop growth. If the cleaning water volume is greater than the irrigation water volume, control the pump speed, valve and nozzle according to the cleaning intensity and cleaning water volume required for cleaning to carry out the cleaning operation; Sd. If the irrigation water volume is greater than or equal to the cleaning water volume, first carry out the cleaning operation according to the cleaning task. After completing the cleaning operation, mainly carry out the irrigation operation, and readjust the pump speed, valve and nozzle to carry out the irrigation; If the irrigation water volume is less than the cleaning water volume, carry out the cleaning operation according to the cleaning task; Se. Real-time monitor and control the system in units of the set time period to complete the irrigation and cleaning operation and maintenance work.

10. A mountain photovoltaic power generation irrigation and precise spraying cleaning operation and maintenance system, applicable to a mountain photovoltaic power generation irrigation and precise spraying cleaning operation and maintenance method as described in any one of claims 1-9, characterized in that: It includes a photovoltaic power generation system, an irrigation system, a data acquisition system and a data analysis system; The photovoltaic power generation system includes a power generation system composed of a physical power generation structure; The irrigation system includes a water supply system composed of a water pump, a pipeline and a nozzle; The data acquisition system is used to collect sensor signals in the photovoltaic power generation system and the irrigation system; The data analysis system is used to process the sensor signals collected by the data acquisition system.

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