@Article{cmes.2019.07793,
AUTHOR = {D. Vijeswaran, V. Manikandan},
TITLE = {Stability Analysis of Cyber-Physical Micro Grid Load Frequency Control System with Time-Varying Delay and Non-Linear Load Perturbations},
JOURNAL = {Computer Modeling in Engineering \& Sciences},
VOLUME = {121},
YEAR = {2019},
NUMBER = {3},
PAGES = {801--813},
URL = {http://www.techscience.com/CMES/v121n3/38070},
ISSN = {1526-1506},
ABSTRACT = {In a cyber-physical micro-grid system, wherein the control functions are
executed through open communication channel, stability is an important issue owing to
the factors related to the time-delay encountered in the data transfer. Transfer of feedback
variable as discrete data packets in communication network invariably introduces
inevitable time-delays in closed loop control systems. This delay, depending upon the
network traffic condition, inherits a time-varying characteristic; nevertheless, it adversely
impacts the system performance and stability. The load perturbations in a micro-grid
system are considerably influenced by the presence of fluctuating power generators like
wind and solar power. Since these non-conventional energy sources are integrated into
the power grid through power electronic interface circuits that usually works at high
switching frequency, noise signals are introduced into the micro-grid system and these
signals gets super-imposed to the load variations. Based on this back ground, in this paper,
the delay-dependent stability issue of networked micro-grid system combined with timevarying
feedback loop delay and uncertain load perturbations is investigated, and a
deeper insight has been presented to infer the impact of time-delay on the variations in
the system frequency. The classical Lyapunov-Krasovskii method is employed to address
the problem, and using a standard benchmark micro-grid system, and the proposed
stability criterion is validated.},
DOI = {10.32604/cmes.2019.07793}
}