Photovoltaic water pump system and water output optimization method

Abstract

The invention relates to a photovoltaic water pump system and a water pump switching method. The photovoltaic water pump system comprises a photovoltaic component, a water pump module, a power output module, a control module, a water pump switching module and a power output module, wherein the photovoltaic component is used for generating electricity; the water pump module comprises a plurality of water pumps which are correspondingly matched with different sunlight intensity regions, and the water pumps are together connected with a water discharging pipeline; the power output module is connected with the photovoltaic component and the water pump module and is used for receiving and outputting electric volume transmitted by the photovoltaic component to the water pump module; the control module is used for acquiring the corresponding sunlight intensity region according to the flow data of the water discharging pipeline and the output power data of the power output module, generating a control signal according to the acquired sunlight intensity region and transmitting the control signal to the water pump switching module; and the water pump switching module is connected between the water pump module and the power output module and is used for switching the corresponding water pump in the water pump module and connecting the corresponding water pump with the power output module according to the received control signal. The photovoltaic water pump system provided by the invention can improve the utilization efficiency of sunlight energy and increase the water yield of the photovoltaic water pump system.

Description

technical field [0001] The invention relates to the field of photovoltaic applications, in particular to a photovoltaic water pump system and a water output optimization method. Background technique [0002] The popularization and application of photovoltaic water pump system has solved the problems of irrigation, livestock and residents' drinking water in deserts, islands, remote mountainous areas and other areas without electricity, and is of great significance to improving the ecological environment. [0003] A conventional photovoltaic water pump system includes photovoltaic modules and a single water pump. The water pump corresponds to a specific "head-flow" curve. The head refers to the height at which the pump can pump water, and the flow refers to the volume of water delivered by the pump per unit time. In fine weather, the variation curve of sunlight intensity is close to a sinusoidal curve. When the sunlight intensity is lower than a certain threshold, the output p...

AI Technical Summary

Problems solved by technology

In fine weather, the variation curve of the sunlight intensity is close to a sinusoidal curve. When the sunlight intensity is lower than a certain threshold, the output power of the photovoltaic module will be less than the power required by the water pump to reach the lift, and the water pump will not be able to discharge water at this time.

It is obviously unable to meet the application occasions with large water consumption and continuous water supply

If it is cloudy and weak sunshine weather, the entire photovoltaic water pump system will produce little or no water, which reduces the utilization efficiency of sunlight energy

[0004] Usually, it can be considered to install a battery in the photovoltaic water pump system to supply power for the water pump, but the installation of the battery will increase the cost, and increase the cost of maintenance and replacement in the later period. Therefore, the current photovoltaic water pump system is rarely used

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