The objective of this paper is to present novel control strategies for MicroGrid operation, especially in islanded mode. The control strategies involve mainly the coordination of secondary load-frequency control by a MicroGrid Central Controller that heads a hierarchical control system able to assure stable and secure operation when the islanding of the MicroGrid occurs and in load-following si...

In this paper, a grid connected microgrid with multiple inverter-based distributed generators (DGs) is considered. DG in FFC mode regulates the microgrid as a controllable load from the utility point of view as long as its output is within the capacity limit. The transition mode causes a change in frequency of microgrid due to the loss of power transferred between main grid and microgrid. Frequ...

We propose a neural Lyapunov approach to assessing transient stability in power electronic-interfaced microgrid interconnections. The problem of assessment is cast as one learning network-structured function the state space. Based on learned, security region estimated for monitoring interconnected microgrids real-time operation. efficacy tested and validated grid-connected three-microgrid inter...

An extreme flexibility of a microgrid operation requires general, integrated and hierarchical proper management and control systems. A wide variety of communication technologies from communication medias, communication protocols to sensors and algorithms are available for microgrid applications. The requirements of communication capabilities differ with the varying microgrid architectures, phys...

This paper presents a grid-tied microgrid testbed for development and verification of automated energy storage management systems. Different assets in the microgrid including renewable generation, programmable load and a battery unit are introduced. Structure of the communication network to monitor and control the assets is also described in details. Based on the microgrid configuration, a cent...

When faults occur in the microgrids, high frequency transients will be superimposed on system currents and voltages. The magnitude of those attenuate as it encounters discontinuity points network such busbars, or any other impedance points. This phenomenon can also quantified by wavelet energy, which provides a useful tool to detect locate faulted feeder microgrid. In this paper, novel protecti...

Recent research has demonstrated the vulnerabilities of cyber physical microgrid to different rates of denial-of-service (DoS) attacks, which send internal requests to degrade the victim’s performance. However, the interaction between the attacks and the security of microgrid remains largely unknown. In this paper, we address two fundamental questions: (1) What is the impact of intermittent DoS...

This paper presents a model for calculating the optimal size of an energy storage system (ESS) in a microgrid considering reliability criterion. A larger ESS requires higher investment costs while reduces the microgrid operating cost. The optimal ESS sizing problem is proposed which minimizes the investment cost of the ESS, as well as expected microgrid operating cost. Utilizing the ESS, genera...

An optimal scheduling model for a microgrid participating in the electricity distribution market in interaction with a Distribution Market Operator (DMO) is proposed in this paper. The DMO administers the established electricity market in the distribution level, sets electricity prices, determines the amount of the power exchange among market participants, and interacts with the Independent Sys...