Hunan Electric Power ›› 2025, Vol. 45 ›› Issue (6): 19-25.doi: 10.3969/j.issn.1008-0198.2025.06.003

• Expert Column:Research on Modeling and Optimization of Largescale New Power System Planning Considering Complex Security Boundaries • Previous Articles     Next Articles

Stochastic Simulation of Electric Vehicle Charging Be‍havior and Charging-Simultaneity-Factor Calculation Method Based on Gaussian Mixture Model

SUN Chongbo1, YUAN Kai1, SONG Yi1, GAO Zhi1, DING Yudi1, DU Mengke2   

  1. 1. State Grid Economic and Technological Research Institute Co., Ltd., Beijing 102209, China;
    2. State Grid Beijing Chaoyang Power Supply Company, Beijing 100031, China
  • Received:2025-08-19 Revised:2025-10-10 Online:2025-12-25 Published:2026-01-13

Abstract: To address the expansion planning of electric vehicle(EV) charging stations and improve the utilization of charging piles, a method for calculating the simultaneity factor is proposed. A Gaussian mixture model(GMM) and a Monte Carlo algorithm-based queuing model is used to simulate user charging behavior, thereby calculating the optimal vehicle-to-pile ratio and simultaneity factor. The influence of multi-scenario factors on the simultaneity factor is investigated, and a charging facility design framework for different scenarios in residential and commercial areas is established. By analyzing charging power characteristic curves of private vehicles, the charging simultaneity factor for diverse scenarios is measured. Case study results demonstrate the effectiveness and feasibility of the proposed method, providing valuable insights for the planning and construction of EV charging stations.

Key words: electric vehicle(EV), charging infrastructure, Gaussian mixture model(GMM), Monte Carlo, charging simultaneity factor

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