Photovoltaic water pumping system

Abstract

The invention provides a photovoltaic water pumping system. The system comprises a photovoltaic array composed of a solar cell panel, and a sun tracking system connected with the photovoltaic array, wherein the sun tracking system controls the orientation of the photovoltaic array aligning to the sun all the time; the photovoltaic array is connected with a motor through a power regulating circuit; the power regulating circuit is used for regulating the output of the photovoltaic array composed of the solar cell panel by changing the load impedance; when the sun strength is reduced, the power regulating circuit converts excessive voltage provided by the photovoltaic array into current; a control system is respectively electrically connected with the power regulating circuit and the motor and used for sending a control signal to the power regulating circuit and controlling the starting, closing and rotating speed of the motor; the motor is connected with a water pump; the water pump supplies water to a water storing system; the water storing system is connected with a water supply system through a water supplying pipeline. According to the system, a centrifugal pump or a volumetric pump can be adopted; the working current and voltage of the solar cell panel can run at the maximum power point.

Description

technical field [0001] The invention relates to a photovoltaic water lifting system and belongs to the field of solar photovoltaic utilization. Background technique [0002] The photovoltaic water pumping system is a device that converts the sun's radiation energy into electrical energy, and then the electric energy drives the water pump to achieve the purpose of water pumping. Photovoltaic water pumping system is light and convenient, flexible in maneuvering, wide in scope of application, and good in economy. It is not only an important means of water supply in remote areas without electricity, but also an ideal water supply method in other areas and fields. It can be used for people and animals in villages, pastures, and families. Water supply can also be combined with water-saving irrigation to irrigate farmland and artificial grassland. [0003] The structure of the traditional photovoltaic water lifting system belongs to the prior art. For example, a photovoltaic power...

AI Technical Summary

Problems solved by technology

For positive displacement pumps, there are usually completely different torque-speed characteristics, which are difficult to directly match with solar panels

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