Flexible charging method and system considering travel demand of electric vehicle user

Abstract

The invention relates to a flexible charging method and system considering travel demands of an electric vehicle user, which can perform linear processing on a charging and discharging model of an electric vehicle and realize flexible regulation and control on charging and discharging power and time periods of the electric vehicle. Through a chance constraint planning method, the state of charge when the electric vehicle leaves reaches the SOC expected by a user, and the voltage range of a power grid is set as soft constraint, so that the soft constraint meets a certain confidence level, and the flexibility of charging and discharging behaviors of the electric vehicle is utilized to cope with the random fluctuation of renewable energy output. And under the condition of ensuring the travel demand of the electric vehicle user, the optimization of the target function is realized. According to the method, the uncertainty caused by renewable energy sources with output as random variables can be processed, the on-site consumption of the renewable energy sources is promoted, and meanwhile, the burden caused by concentrated charging of a large number of electric vehicles to a power grid is reduced.

Description

technical field [0001] The invention relates to the technical fields of new energy and electric vehicles, in particular to a flexible charging method and system that consider travel needs of electric vehicle users. Background technique [0002] With the consumption of fossil energy and the deterioration of the environment, countries around the world are paying more and more attention to the concept of energy conservation and environmental protection. After years of exploration, the development of renewable energy and electric vehicles (Electric Vehicle, EV) has become one of the effective ways for human beings to solve energy and environmental problems. [0003] Among the renewable energy sources, solar energy has great development value due to its cleanness, environmental protection and wide coverage, and has become a relatively mature renewable energy power generation technology. Although the penetration rate of photovoltaic power generation is increasing year by year, th...

AI Technical Summary

Problems solved by technology

However, the charging time of EVs is random and aggregated. Large-scale access to EVs within the same time period will further increase the peak-to-valley difference in grid load, thereby increasing the burden on the grid and operating costs, and adversely affecting the grid.

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