Off-grid photovoltaic system load management method and system

Abstract

The invention discloses an off-grid photovoltaic system load management method and system. The off-grid photovoltaic system load management method includes the steps: obtaining the daily generating capacity of a solar photovoltaic cell in the past N days, and the solar radiation intensity proportion ratio of the past N days and the future N days; determining the daily generating capacity of the solar photovoltaic cell in the future N days according to the generating capacity in the past N days and the solar radiation intensity proportion ratio of the past N days and the future N days; acquiring the weight of the daily generating capacity of the future N days; determining the total generating capacity of the future N days according to the daily generating capacity of the solar photovoltaiccell in the future N days and the corresponding daily generating capacity in the future N days; acquiring the remaining power of a storage battery; determining the predicted power supply according tothe total generating capacity and the remaining power; acquiring the average power consumption of loads with different priorities within N days; and accessing the loads with different priorities according to the predicted power supply and the average power consumption. The off-grid photovoltaic system load management method and system can solve the problem of insufficient power supply due to insufficient photovoltaic power generation and insufficient energy storage, for the user.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation, in particular to a load management method and system for an off-grid photovoltaic system. Background technique [0002] Off-grid photovoltaic systems can solve the problem of power supply in remote mountainous areas and areas without grids, and are widely used. The energy balance of the photovoltaic off-grid system needs to be stabilized by charging and discharging the battery. The battery is used as a load when the power provided by the photovoltaic array is higher than the load needs, and the battery is charged by the photovoltaic array at this time; when the power provided by the photovoltaic array is not enough to supply the load, the battery is used as a power supply to discharge power to the load to achieve Energy balance of photovoltaic off-grid systems. At present, the photovoltaic off-grid system does not consider the weather conditions and load management issues. For examp...

AI Technical Summary

Problems solved by technology

At present, the photovoltaic off-grid system does not consider the weather conditions and load management issues. For example, the rainy weather in the south lasted for half a month, and the solar photovoltaic array generated insufficient power. Therefore, in order to ensure the reliability of electricity consumption during this period, the load must be reasonably adjusted. manage

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