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In this article, a novel adaptive distributed secondary voltage controller for islanded microgrids (MGs) is proposed. Uncertainties/disturbances are essential factors that can influence the stability of an MG. Unlike previous methods, uncertainties are implicitly embedded by the Lue'r type system in the MG model. The proposed controller is based on a novel consensus protocol and a new control law that has a higher convergence rate than the traditional consensus protocol and its performance is quite satisfactory under large uncertainties. Different simulations are performed in MATLAB/SimPower Toolbox on a typical six-distributed generator MG and under various disturbances. The simulation results show the effectiveness of the proposed controller. Generally speaking, the proposed controller increases the resiliency of MGs. [ABSTRACT FROM AUTHOR]

Extreme weather events such as earthquake and hurricane have disastrous consequences on power systems. Due to the inherent nature of these events, as high-impact low-probability (HILP) events, selection of an appropriate method that can provide the effects of weather conditions on the power system behavior still remains a significant challenge. Resilience is a new concept that focuses on mitigating the destructive effects of such disastrous events on power systems. This article provides a fundamental framework for quantifying and modeling of power systems resilience, with focus on high wind incidence. The algorithm composes of four steps. In the first step, the prerequisites of the analysis are described. Disaster modeling is carried out in step second and the transmission line status and system topology obtaining are outlined in the third step. In the last step, based on optimal power flow tracing, a novel resilience index is introduced based on axiomatic design concepts. The core of the main algorithm involves a novel matrix-based approach to count automatically all possible routes from generators to loads, considering load importance, before and after a disruption. The effectiveness of the proposed approach is illustrated by the IEEE 14-bus system. The proposed methodology is original and a comprehensive approach. [ABSTRACT FROM AUTHOR]