Abstract
A novel delay-adaptive control strategy is proposed to enhance the smart grid resilience and transient stability which combines the traditional governor-based control with the distributed energy storage system (DESS) control. In this paper, the communication delay is fully considered in the development of the controller, where the distributed control mode would convert to the decentralized control mode automatically in the case of large communication delay. Meanwhile, the effect from input delay of the DESS-based control is solved by Artstein transformation, which is firstly used in the transient stability control of the time delayed power system to reduce the time delayed state equation of power system into the delay-free state equation of power system. The stability of power system under the proposed control scheme is ensured based on the reduced power system model to improve the input delay characteristics of power system. The delay-adaptive governor-based control also accommodates to the case of a generator bus without any associated DESS. Meanwhile, the designed objectives also address some practical challenges, including limited DESS capacity and sample noise.
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