Abstract
The translational sprinkler irrigation machine is widely used because of its high degree of automation, less manual investment, and convenient movement. However, when using the sprinkler irrigation machine, the power supply is difficult to be guaranteed in some remote power shortage areas. Solar energy has become one of the best choices for the power source of sprinkler irrigation machines. An important issue is the optimal sizing of the stand-alone photovoltaic system for a solar-powered translational sprinkler irrigation machine. This work conducts the optimal sizing of the stand-alone photovoltaic system for a solar-powered translational sprinkler irrigation machine considering the loss of power supply probability. Firstly, the self-developed translational sprinkler irrigation machine is introduced. The load power, which includes the driving power of the translational sprinkler irrigation machine, water intake pressure driving power, and the loss power of the controller and sensors, is considered in the calculation process. Subsequently, the photovoltaic generator model and the battery storage model are established. Then, the stand-alone photovoltaic system is optimized considering the loss of power supply probability (LPSP) and the life cycle cost (LCC). After the solar irradiance and ambient temperature of a typical sunny day in the test area are given, the optimal combination of the PV module and battery is obtained. The optimal sizing result is verified using the PV power, state of charge (SOC), and load power. The presented optimal sizing method is also compared with an existing method. Besides, the operation test of the sprinkler irrigation machine is also carried out to verify the optimal sizing result. The optimal sizing result is proved to be effective and applicable.
Highlights
Academic Editor: Licheng Wang e translational sprinkler irrigation machine is widely used because of its high degree of automation, less manual investment, and convenient movement
An important issue is the optimal sizing of the stand-alone photovoltaic system for a solar-powered translational sprinkler irrigation machine. is work conducts the optimal sizing of the stand-alone photovoltaic system for a solar-powered translational sprinkler irrigation machine considering the loss of power supply probability
The photovoltaic generator model and the battery storage model are established. en, the stand-alone photovoltaic system is optimized considering the loss of power supply probability (LPSP) and the life cycle cost (LCC)
Summary
E self-developed translational sprinkler irrigation machine comprises the solar photovoltaic power supply, mechanical structure, and control system parts. The self-developed sprinkler irrigation machine mainly includes the solar photovoltaic module, battery, main water pipe, water pump, steering motor, high-clearance chassis, control cabinet, walking motor reducer, nozzle, and so on. E theoretical charging capacity of the battery within time t and t + Δt is expressed as follows: ΔEstore Ppv(t) −. E theoretical discharging capacity of the battery within time t and t + Δt is expressed as follows: ΔEstore. When SOC(t + Δt) < SOCmin, the actual discharge capacity of the battery during time t and t + Δt can be expressed as follows: ΔEdischarge NbErate SOC(t) − SOCmin. When SOC(t + Δt) > SOCmax, the actual charge capacity of the battery during time t and t + Δt can be expressed as follows: ΔEcharge NbErate SOCmax − SOC(t). It is assumed that the battery is full charged. at is, the initial value of SOC is chosen as 100%
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