A photovoltaic energy storage scheduling method based on mixed integer nonlinear programming

Abstract

In the method, modeling is realized according to relations between photovoltaic power generation output power, time values, illumination intensity and temperature values, and predicted photovoltaic generation output power and load consumption power are obtained according to the relation between consumption power and time; by means of taking a present battery residual capacity into consideration, a charge and discharge decision sequence and an operation switching decision sequence during the occurrence of an optimal electricity-taking power from a power supply grid are obtained; and according to a calculating result, photovoltaic energy storage scheduling is carried out. According to the invention, the photovoltaic energy storage scheduling method is obtained through calculating of data; according to predicted specific parameters, charge and discharge and system switching controlling are carried out; avoidance of over-charge and over-discharge states of a charging battery module is avoided; the usage lift of the battery is prolonged; cases that photovoltaic power generation exceeds load electricity consumption and thus causing waste of photovoltaic power generation when the battery is fully charged are avoided so as to realize optimal energy utilization. Simultaneously, the safety of the system is raised. As a photovoltaic energy storage scheduling method based on the mixed integer non-linear programming, the invention can be widely applied to the field of photovoltaic power generating and energy storage.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation and energy storage, in particular to a photovoltaic energy storage scheduling method based on mixed integer nonlinear programming. Background technique [0002] The problem of energy shortage is a very important problem in the 21st century, and one of the best ways to solve this problem is to use solar power to generate electricity. Solar energy is widely distributed and nearly endless, but one problem with photovoltaic power generation systems using solar power is that photovoltaic resources are also intermittent and uncertain, making it difficult to provide a continuous and stable power supply for loads. [0003] At present, the commonly used method is to use energy storage systems to store or release electric energy, thereby reducing the impact of weather on photovoltaic power generation systems, stabilizing power supply for users, and ensuring the reliability and quality of power s...

AI Technical Summary

Problems solved by technology

In order to further improve the energy management efficiency of the photovoltaic power generation system, a battery management system is generally set up to manage it, but this method simply controls the charging and discharging of the battery module. With the increase of photovoltaic power generation system components and the expansion of functions, This control method is increasingly showing defects such as low efficiency, slow response, and poor control accuracy, and it cannot perform charge and discharge control according to the load situation and the parameters of the battery module, and the energy utilization efficiency is low.

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