Electric Vehicle Charging Load Model Based on Diffusion Theory

Purpose: discuss actual application value of the diffusion theory in massive electric vehicle charging load. Method: introduce single vehicle charging process, extend it to charging process of two and multiple electric vehicles, abstract physical process of parallel charging of electric vehicles, introduce energy block concept and diffusion theory, and establish diffusion charging model of electric vehicles based on them. Results: computing results of the charging load of multiple electric vehicles indicates that the computing results of the diffusion load model of electric vehicles feature better continuity and lower load compared to the computing results of the Monte Carlo load model. The charging load curve of private vehicles shows double peaks on the business days. The charging load of vehicles reduces at the weekend and shows single-peak curve. Conclusion: the computing results validate effectivity of the diffusion theory in charging model of multiple electric vehicles, which is worthy of further research in industrialization process.