Fuzzy control based intelligent photovoltaic power generation type lifting irrigation system and control method thereof

Abstract

The invention discloses a fuzzy control based intelligent photovoltaic power generation type lifting irrigation system and a control method thereof. The system comprises a photovoltaic panel, a waterstorage device and a controller. Electromagnetic valves are arranged at two ends of the water storage device, and the controller is connected to the photovoltaic panel and the electromagnetic valves and collects electric energy from the photovoltaic panel. The controller selects power derivation and power-voltage slope as input to establish a fuzzy rule library on the basis of the power derivationand power-voltage slope, maximum-power tracking of the photovoltaic panel is realized, and electric energy of the photovoltaic panel is stored and supplied to the controller. The controller judges whether irrigation is needed or not according to field humidity and controls corresponding electromagnetic valves to open when irrigation is needed, and then the water storage device is used for irrigation. By means of photovoltaic power generation, the problem of irrigation in regions without power grids is solved. By arrangement of a high-level water tank, an irrigation range is expanded by high potential energy of the water tank, and using a motor for irrigation is avoided.

Description

Technical field [0001] The invention relates to the technical field of intelligent control, in particular to an intelligent photovoltaic power generation water-lifting irrigation device based on fuzzy control and a control method thereof. Background technique [0002] In my country’s remote areas and mountainous and hilly areas, because urban power grids cannot be covered, farmland cannot be irrigated, crops can only rely on natural rainfall, and yields are very low. In these areas, there are abundant photovoltaic resources, and off-grid photovoltaic power generation can be used to solve the irrigation problem of local residents. It can greatly promote the increase of crop yields. [0003] In the existing photovoltaic power generation for water extraction and irrigation, there are mainly the following two problems: [0004] 1. The current maximum power tracking control of photovoltaic power generation mainly consists of fixed step search and variable step search. For example, the ...

AI Technical Summary

Problems solved by technology

but no specific control strategy

Moreover, there is a big problem in the prior art that the threshold value of the water outlet solenoid valve is fixed, it is opened when it is greater than the threshold value, and is closed when it is less than the threshold value.

And within a certain period of time, the data fed back by the humidity sensor is likely to fluctuate above and below the threshold

This causes frequent opening of the solenoid valve, which greatly reduces the life of the solenoid valve.

[0007] To sum up, in the existing technology, there is still no effective solution to the technical problem of how to use photovoltaic power generation to realize intelligent irrigation in remote areas

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