Photovoltaic water pump control method and device

Abstract

The present invention relates to the water pump driving control technology field, and discloses a photovoltaic pump control method and device. The photovoltaic pump control method and device are applied to a photovoltaic pump system. The photovoltaic pump system comprises: a photovoltaic array configured to provide photovoltaic power; a boosted circuit directly connected with the photovoltaic array and configured to boost the bus voltage; and an inversion circuit configured to convert the bus voltage to the alternating current voltage to drive a water pump motor. The photovoltaic pump control method comprises: detecting the output power and the output voltage of the photovoltaic array in real time and the work parameters of the water pump motor, wherein the work parameters comprise the water pump rotation speed; controlling the multiple of the bus voltage outputted by the boosted circuit and the output voltage to be maintained in a preset range according to the detected output power and the output voltage of the photovoltaic array and the work parameters of the water pump motor.

Description

technical field [0001] The invention relates to the technical field of water pump drive control, in particular to a photovoltaic water pump control method and device. Background technique [0002] In some remote areas of my country, the lack of surface water and the lack of traditional mains power grids have led to difficulties in irrigation and civil pumping. However, these remote areas are rich in solar energy resources and rich in groundwater resources, which provide favorable conditions for the implementation of photovoltaic submersible pump irrigation. Photovoltaic submersible pump system can utilize durable and green energy from solar energy. It is an irrigation system that is very suitable for independent water pumping in remote areas, deserts and other areas. In terms of domestic water, photovoltaic submersible pumps can also be used for civilian use in areas without grids pumping. [0003] The photovoltaic submersible pump system uses solar energy as the energy in...

AI Technical Summary

Problems solved by technology

When a capacitor with a small capacitance value is used, because the DC voltage stabilization and filtering functions of the capacitor are weak, the battery voltage fluctuates greatly, which makes the current of the water pump motor in the subsequent stage easily fluctuate greatly, which in turn causes the motor to malfunction. work; when a capacitor with a large capacitance value is used, although it can play a good role in stabilizing the voltage, it makes the volume of the capacitor too large, which is not conducive to the structural layout of the inverter

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