I. Introduction
As awareness about environmental pollution due to fossil fuels rises, the adoption of eco-friendly vehicles such as electric vehicles (EV) and hydrogen vehicles (HV) is being encouraged in many countries [1]. The electrification of the transportation system by using EVs and HVs can effectively reduce fossil fuel use. Many concerns associated with EVs and HVs have been overcome by the development of batteries and fast charging technology for EVs and stability technology for HVs. In particular, a fast-charging station can improve the satisfaction of EV drivers by substantially reducing charging time. However, fast charging for EVs and HVs results in heavy charging demands, which can cause stability issues (e.g., voltage drops) in the distribution system.