The penetration of distributed generators (DGs)-based power electronic devices leads to low inertia and damping properties the modern grid. As a result, system becomes more susceptible disruption instability, particularly when demand changes during critical loads or needs switch from standalone grid-connected operation mode vice versa. Developing robust controller deal with these transient case...

The present work proposes a state observer with a cascade structure for a class of nonlinear systems in the presence of uncertainties in the state equations and an arbitrarily long delay in the output. The first system in the cascade allows to estimate the delayed state while each of the remaining systems is a predictor. Each predictor estimates the state of the preceding one with a prediction ...