Robust Power Transfer Control of a Vehicle-to-Grid Charging Station Using Backstepping and Double Integral Sliding Mode Control

Engineering notes

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Chinese explanation / 中文解读

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Original abstract

Abstract The growing integration of vehicle-to-grid (V2G) technology has made bidirectional charging stations an important requirement for modern electric vehicle infrastructure. These stations make it possible for electric vehicles (EV) to supply energy back to the grid whenever ancillary services are needed. To regulate, this bidirectional exchange of energy, a robust control strategy is essential. Despite this need, the research conducted in this field is scarce. In this regard, this paper addresses the control aspects of a V2G-CS by investigating the backstepping and double integral sliding mode schemes to control its bidirectional power converters. The performances of the control schemes were tested under realistic scenarios, including two charging profiles, a multi-level discharging power profile, and a scenario where five EVs interact with the grid and each other. Furthermore, the disturbance-rejection capability as well as robustness against parameter variation were also investigated. The achieved results emphasized the tracking effectiveness of the controllers under the discharging and charging modes and highlighted the ability of the V2G-CS to satisfy the grid power requirement. The DISMC demonstrated a response time of 0.5ms with an average current error of 0.7A. The backstepping yielded a response time of 30ms, an average DC-bus voltage error of 1V, and a THD value of 0.83%.

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