Study On Optimizing Of Allocation For Lateral Move Sprinkling Machine With The Photovoltaic Driving Forces

The translating sprinkler unit has the advantages of low investment,high efficiency and flexibility,which can meet the needs of rural development in China.Therefore,it is welcomed by farmers.However,the electric translation sprinkler is unable to meet the irrigation demand of remote power shortage because of its characteristics of electric driving.The solar translating sprinkler unit is in line with the development trend of low-pressure sprinkler irrigation,green clean energy-driven and precision automatic irrigation,which is driven by low-pressure sprinkler and supplied by solar power.There is the effect of both energy-saving emission reduction and water-saving irrigation in agricultural irrigation equipment area.It has a huge application prospects in China’s western region where sunlight is adequate.The performance of solar translating sprinkler is influenced by meteorological factors.Meteorological conditions not only affect the water consumption of crops,but also affect the power generation capacity of solar sprinklers.While,the number of solar power generation directly affects the irrigation operation capacity of the irrigation machine.Therefore,it is necessary to study solar sprinkler PV driving power optimization configuration based on crop irrigation system and the economic cost of solar irrigation sprinkler.In this paper,the optimization of PV driving power optimization is carried out.Based on the lowest cost of the whole life cycle of the unit,the load loss rate and energy spill ratio are set as the constraint indexes,and the PV driving energy optimization and power supply performance are analyzed around the seasonal load of the unit and research.The main contents of this paper include the following parts:(1)Photovoltaic cell output characteristics and simulation test.The PV module is modeled by Matlab / Simulink,and the output characteristics of PV modules under different solar radiation intensity and ambient temperature are obtained.Further,the total power generation capacity of PV modules and the simulation results are obtained.The results are within 6% of the allowable accuracy.(2)Optimization of PV driving energy configuration.This paper presents a method of PV configuration for solar translating sprinkler,which aims at the minimum life cycle cost of the system.Taking the load loss rate and energy spill ratio as the constraint,the optimal layout of the PV array with seasonal load is obtained.Also optimal allocation of system battery and photovoltaic cell capacity is achieved.The solar sprinkler is mainly used for spring-summer irrigation.When optimizing the inclination of the plant,the maximum solar irradiance of the PV array in the month of crop irrigation should be made.Solar water sprinkler rainy weather waiting for the operation or less operations,according to the crop irrigation water plan,to meet the peak water demand during crop irrigation conditions,may consider appropriate to improve the load loss rate to meet the unit economy and practicality Claim.(3)A method of evaluating the power supply performance of solar sprinkler based on PVSYST is proposed.Based on the typical historical weather data,the inclination of the PV array is optimized by taking into account the electricity requirement of the potato irrigation period and the peak water consumption period.The power supply guarantee rate is 78.9%,and the load loss rate is 20.9% and the power shortage time is 1830 h.The guarantee rate of the potato irrigation period is 96%,and the water supply guarantee rate from June to July is 98.1%,power shortage time is of about 41 h.Therefore,solar translating irrigation machine has met the potatoes throughout the growth period of irrigation requirements.(4)Study of unit power supply performance analysis and operating state test.By using the cumulative operating time as the power supply capacity of the unit,the load loss rate and the energy overflow ratio are used as the power supply reliability index.The experimental results show that the unit can work continuously for 6 to 15 hours,which basically meets the irrigation requirement of the crop.The energy consumption of the PV energy during the whole growth period is 43.5%.The energy utilization rate of the potato peak is the largest and the energy spill ratio 0.4%.Therefore,solar power generation capacity can meet the needs of the unit irrigation and electricity.Battery charge status remained at 38% or more in the 8 consecutive days of the test.Solar irrigation machine guarantees power supply rate of 100% and solar energy overflow ratio of 17.8%.Thus,the independent photovoltaic power generation system engineering range of 5% to 30% requirements is meted.