Journal ArticleDOI
Autonomous operation of hybrid microgrid with AC and DC sub-grids
Poh Chiang Loh,Ding Li,Yi Kang Chai,Frede Blaabjerg +3 more
- Vol. 28, Iss: 5, pp 2214-2223
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TLDR
In this article, the authors investigated on the active and reactive power sharing of an autonomous hybrid microgrid, which comprises dc and ac sub-grids, interconnected by power electronic interfaces.Abstract:
This paper investigates on the active and reactive power sharing of an autonomous hybrid microgrid. Unlike existing microgrids which are purely ac, the hybrid microgrid studied here comprises dc and ac sub-grids, interconnected by power electronic interfaces. The main challenge here is to manage the power flow among all the sources distributed throughout the two types of sub-grids, which certainly is tougher than previous efforts developed for only either ac or dc microgrid. This wider scope of control has not yet been investigated, and would certainly rely on the coordinated operation of dc sources, ac sources and interlinking converters. Suitable control and normalization schemes are therefore developed for controlling them with results presented for showing the overall performance of the hybrid microgrid.read more
Citations
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Journal ArticleDOI
AC-microgrids versus DC-microgrids with distributed energy resources: A review
TL;DR: In this article, the authors present a comprehensive literature review of AC and DC microgrid (MG) systems in connection with distributed generation (DG) units using renewable energy sources (RESs), energy storage systems (ESS) and loads.
Journal ArticleDOI
DC Microgrids—Part II: A Review of Power Architectures, Applications, and Standardization Issues
TL;DR: In this article, an overview of the state of the art in dc microgrid protection and grounding is provided, which discusses both design of practical protective devices and their integration into overall protection systems.
Journal ArticleDOI
Distributed Cooperative Control of DC Microgrids
TL;DR: In this paper, a cooperative control paradigm is used to establish a distributed secondary/primary control framework for dc microgrids, where the conventional secondary control, that adjusts the voltage set point for the local droop mechanism, is replaced by a voltage regulator and a current regulator.
Journal ArticleDOI
Overview of Power Management Strategies of Hybrid AC/DC Microgrid
Farzam Nejabatkhah,Yun Wei Li +1 more
TL;DR: This paper presents an overview of power management strategies for a hybrid ac/dc microgrid system, which includes different system structures, different operation modes, a thorough study of various power management and control schemes in both steady state and transient conditions, and examples of powermanagement and control strategies.
Journal ArticleDOI
Power Control and Management in a Hybrid AC/DC Microgrid
N. Eghtedarpour,Ebrahim Farjah +1 more
TL;DR: A decentralized power sharing method is proposed in order to eliminate the need for any communication between DGs or microgrids and the performance of the proposed power control strategy is validated for different operating conditions, using simulation studies in the PSCAD/EMTDC software environment.
References
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Design, analysis, and real-time testing of a controller for multibus microgrid system
TL;DR: In this paper, the design and analysis of a unified controller for multibus microgrid system is presented, which includes inner voltage and current loops for regulating the three-phase grid-interfacing inverter, and external power control loops for controlling real and reactive power flow and for facilitating power sharing between the paralleled DG systems.
Journal ArticleDOI
Control of Distributed Uninterruptible Power Supply Systems
TL;DR: The most important control schemes for the parallel operation of UPS systems, including active load-sharing techniques and droop control approaches, are depicted.
Journal ArticleDOI
Improvement of Stability and Load Sharing in an Autonomous Microgrid Using Supplementary Droop Control Loop
TL;DR: In this article, a supplementary loop is proposed around a conventional droop control of each DG converter to stabilize the system while using high angle droop gains, which is formulated as a parameter optimization problem and solved using an evolutionary technique.
Journal ArticleDOI
Low-Voltage DC Distribution System for Commercial Power Systems With Sensitive Electronic Loads
D. Salomonsson,A. Sannino +1 more
TL;DR: In this article, the use of DC power system to supply sensitive electronic loads is treated, and general design issues regarding DC power systems are discussed, and then the measurement results from a scaled laboratory setup are presented.
Journal ArticleDOI
DC distribution for industrial systems: opportunities and challenges
Mesut Baran,N.R. Mahajan +1 more
TL;DR: In this paper, the authors investigated the opportunities and challenges associated with adopting a DC distribution scheme for industrial power systems and proposed a grounding scheme and showed that this scheme provides an effective solution by keeping the neutral voltages low under normal conditions and by limiting the fault currents during fault conditions.