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Journal ArticleDOI

Distributed Robust Finite-Time Secondary Voltage and Frequency Control of Islanded Microgrids

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TLDR
In this article, a distributed cooperative secondary control for both voltage and frequency restoration of an islanded microgrid with droop-controlled inverter-based distributed generators (DGs) is presented.
Abstract
This paper presents a distributed, robust, finite-time secondary control for both voltage and frequency restoration of an islanded microgrid with droop-controlled inverter-based distributed generators (DGs). The distributed cooperative secondary control is fully distributed (i.e., uses only the information of neighboring DGs that can communicate with one another through a sparse communication network). In contrast to existing distributed methods that require a detailed model of the system (such as line impedances, loads, other DG units parameters, and even the microgrid configuration, which are practically unknown), the proposed protocols are synthesized by considering the unmodeled dynamics, unknown disturbances, and uncertainties in their models. The other novel idea in this paper is that the consensus-based distributed controllers restore the islanded microgrid's voltage magnitudes and frequency to their reference values for all DGs within finite time, irrespective of parametric uncertainties, unmodeled dynamics, and disturbances, while providing accurate real-power sharing. Moreover, the proposed method considers the coupling between the frequency and voltage of the islanded microgrid. Unlike conventional distributed controllers, the proposed approach quickly reaches consensus and exhibits a more accurate robust performance. Finally, we verify the proposed control strategy's performance using the MATLAB/SimPowerSystems toolbox.

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Journal ArticleDOI

Observer-based distributed control and synchronization analysis of inverter-based nonlinear power systems

TL;DR: A novel observer-based secondary voltage and frequency restoration control scheme is proposed that can integrate the advantages of centralized and decentralized control systems and implement in a fully distributed way such that the power systems can realize the plug-and-play function.
Journal ArticleDOI

A Nonlinear, Bounded and Lipchitz Continuous Distributed Active Power Sharing Control Method for Islanded AC Microgrids

TL;DR: A nonlinear, bounded, distributed secondary control (DSC) method is proposed to coordinate all the distributed generators (DGs) in islanded AC microgrids (MGs) to realize an accurate active power sharing control.
Journal ArticleDOI

A Cascaded Distributed Control Framework in DC Microgrids

TL;DR: A cascaded control framework is proposed to achieve the voltage regulation and power sharing, in which only the power state variable is exchanged without the voltage observer.
Journal ArticleDOI

Auxiliary signal-assisted droop-based secondary frequency control of inverter-based PV microgrids for improvement in power sharing and system stability

TL;DR: This study proposes a modified decentralised droop controller for inverter-based autonomous photovoltaics (PV) microgrids to address the problem of instability and slower power sharing between PV inverters.
References
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Journal ArticleDOI

Hierarchical control of droop-controlled DC and AC microgrids — a general approach towards standardization

TL;DR: The hierarchical control derived from ISA-95 and electrical dispatching standards to endow smartness and flexibility to MGs is presented and results are provided to show the feasibility of the proposed approach.
Journal ArticleDOI

Modeling, Analysis and Testing of Autonomous Operation of an Inverter-Based Microgrid

TL;DR: In this paper, the authors developed a model for autonomous operation of inverter-based micro-grids, where each sub-module is modeled in state-space form and all are combined together on a common reference frame.
Journal ArticleDOI

Advanced Control Architectures for Intelligent Microgrids—Part I: Decentralized and Hierarchical Control

TL;DR: Decentralized, distributed, and hierarchical control of grid-connected and islanded microgrids that mimic the behavior of the mains grid is reviewed.
Journal ArticleDOI

Hierarchical Structure of Microgrids Control System

TL;DR: This paper reviews the status of hierarchical control strategies applied to microgrids and discusses the future trends.
Book

Cooperative Control of Dynamical Systems: Applications to Autonomous Vehicles

TL;DR: In this paper, a new framework based on matrix theory is proposed to analyze and design cooperative controls for a group of individual dynamical systems whose outputs are sensed by or communicated to others in an intermittent, dynamically changing, and local manner.
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