Asymptotic Stability of Electric-Vehicle-to-Grid System With Actuator Faults

The asymptotic stability of the electric vehicle-to-grid (V2G) system with actuator faults (AFs) is studied in this article. When control signals transmit from controllers to actuators, AFs may affect control laws and destroy the asymptotic stability of the V2G system. Thus, the asymptotic stability of the V2G system with AFs is worked out by the proposed methods in two steps. First, the effects of AFs are analyzed that break or reduce passivity of the V2G system. Second, structure and energy features of the V2G system with AFs are applied to stabilize the system asymptotically. The proposed methods not only avoid applying the observer of traditional fault-tolerant control (FTC) methods to design control laws but also avoid switching from one control law to traditional FTC control law. Finally, the validity and advantages of the proposed methods are shown in examples.