Abstract:

This paper defines and discusses different charging strategies of EVs. The literature covering Plug-in Electric Vehicles (EVs) contains many charging/discharging strategies. However, none of the review papers covers such strategies in a complete fashion where all patterns of EVs charging/discharging are identified. Filling a gap in the literature, the authors clearly and systematically classify such strategies. After providing a clear definition for each strategy, the authors provide a detailed comparison between them by categorizing differences as follows: complexity; economics and power losses on the grid side; ability to provide ancillary services for integrity of the power grid; operation aspects (e.g., charging timing); and detrimental impact on the EV, the power grid, or the environment. Each one of these comparison categories is subdivided into even more detailed aspects. Following a comparison of EV charging and discharging methods, the authors make suggestions as to which strategies are best for which applications. The authors then assign ratings to each technique by combining all aspects of comparison. The review assists authors or aggregators in determining which options are most likely to meet the particular requirements of their systems or test beds. The study's shortcomings are that it does not go into great depth for the sake of convenience, and it is aimed at people who are unfamiliar with various charging strategies.