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.read more
Citations
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Journal ArticleDOI
Analysis of Three-Phase Inverter Parallel Operation with Network-Based Control Having Strong Robustness and Wide Time-Scale Compatibility in Droop-Controlled AC Microgrid
TL;DR: The comprehensive analysis of network-based control strategy with strong robustness and wide time-scale compatibility is investigated in islanded mode of an AC microgrid with paralleled inverters and it is verified that its good power-sharing can be obtained under unsatisfactory communication conditions.
Journal ArticleDOI
Droop-based active voltage regulation control and robust stability analysis for VSCs in the large-scale RES-integrated power system
TL;DR: In this paper, a droop-based active voltage control strategy for VSCs in large-scale RES-integrated power systems is proposed to make VSC operators continue to operate and regulate the voltage at the point of common coupling (PCC) during a fault without causing overcurrent.
Journal ArticleDOI
Optimal Frequency Control for Inverter-Based Micro-Grids Using Distributed Finite-Time Consensus Algorithms
Qian Cao,Weicheng Xie +1 more
TL;DR: It is proved that the equilibrium point of the closed-loop system is the unique optimal solution to the associated economic dispatch problem and the optimal frequency control problem by establishing an equivalent nonlinear second-order dynamic model.
Journal ArticleDOI
Identification of gain and phase margins based robust stability regions for atime-delayed micro-grid system including fractional-order controller in presenceof renewable power generation
TL;DR: In this paper , the robust stability regions containing a set of robust FOPI controller gains for all possible transfer functions of the MG system by a simple graphical method working in controller parameter space is exhaustively examined by the graphical method.
Book ChapterDOI
Consensus Algorithm Based Distributed Coordinated Control for ESSs Integrated Off-grid PV Station
TL;DR: A distributed coordinated control strategy based on consensus algorithm is proposed for off-grid PV station considering the operation characteristics of PV and ESSs and the feasibility and effectiveness of the proposed control method is validated by the simulation results.
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
Ali Bidram,Ali Davoudi +1 more
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.