In this paper, a broad overview of the current research trends in power-electronic innovations in cyberphysical systems (CPSs) is presented. The recent advances in semiconductor device technologies, control architectures, and communication methodologies have enabled researchers to develop integrated smart CPSs that can cater to the emerging requirements of smart grids, renewable energy, electric vehicles, trains, ships, internet of things (IoTs), etc. The topics presented in this paper include novel power-distribution architectures, protection techniques considering large renewable integration in smart grids, wireless charging in electric vehicles, simultaneous power and information transmission, multi-hop network-based coordination, power technologies for renewable energy and smart transformer, CPS reliability, transactive smart railway grid, and real-time simulation of shipboard power systems. It is anticipated that the research trends presented in this paper will provide a timely and useful overview to the power-electronics researchers with broad applications in CPSs.

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Transient stability analysis (TSA) of power system is gaining significant importance given the dwindling gap of power generation and demand as well as increasing penetration of intermittent renewable energy sources. Traditional approach to TSA has been primarily based on time-domain analysis or energy-function-based approach or based on common-Lyapunov function-based approach. In this paper, exploration of a polynomial-Lyapunov-function based approach is outlined. It promises to overcome the key weaknesses of the traditional approaches with regard to eliminating the need for extensive time-domain simulation or determining specific energy-function or common-Lyapunov forms which is highly intuitive and in several cases are non-existing or do not conform to the definition of Lyapunov's stability.Index Terms-Transient stability analysis, polynomial Lyapunov function, power system, optimization I.