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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Proceedings ArticleDOI
A decentralized adaptive droop based power management scheme in autonomous DC microgrid
TL;DR: In this paper, a decentralized priority based adaptive droop control strategy is proposed to charge/discharge the batteries proportionately to achieve energy equivalence in an autonomous DC microgrid, which takes care of changing demand subject to the intermittent behaviour of solar PV array, slow dynamics of solid oxide fuel cell (SOFC) and battery longevity constraints.
Journal ArticleDOI
Distributed coordination control of hybrid energy resources for power sharing in coupled hybrid DC/AC microgrid using paralleled IFCs/ILCs
Alok Agrawal,Rajesh Gupta +1 more
TL;DR: Flexible controllers for the interlinking converter (ILC) and interfacing converters (IFCs) used in coupled hybrid AC/DC microgrids (HMGs) minimise the need for the controller parameter tuning as opposed to the conventional controllers used in zonal HMG systems.
Journal ArticleDOI
Power management and control coordination strategy for autonomous hybrid microgrids
TL;DR: An improved power management and control coordination strategy for autonomous hybrid microgrids that avoids the significant power loss on the ILCs that adversely affects the operational feasibility of the hybrid MGs.
Journal ArticleDOI
An efficient SoC-balancing based power management strategy for interconnected subgrids of DC microgrid
TL;DR: In this paper , a coordinated power management strategy is proposed for voltage restoration, SoC balancing, and distributed power sharing among the interconnected subgrids of a dc microgrid (DC-MG).
Proceedings ArticleDOI
Bottom-up and recursive interconnection for multi-layer DC microgrids
TL;DR: In this paper, a non-droop based procedure to exchange power from one subsystem to another in order to balance demand/generation fluctuations within the community without requiring any central monitoring or control is proposed.
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.
Proceedings ArticleDOI
Microgrid: a conceptual solution
Robert H. Lasseter,P. Paigi +1 more
TL;DR: In this article, the authors propose a system approach which views generation and associated loads as a subsystem or a "microgrid". During disturbances, the generation and corresponding loads can separate from the distribution system to isolate the microgrid's load from the disturbance (providing UPS services) without harming the transmission grid's integrity.
Journal ArticleDOI
Control of parallel connected inverters in stand-alone AC supply systems
TL;DR: In this article, a control scheme for parallel-connected inverters in a standalone AC supply system is presented, which uses feedback of only those variables that can be measured locally at the inverter and does not need communication of control signals between the inverters.
Journal ArticleDOI
A Voltage and Frequency Droop Control Method for Parallel Inverters
TL;DR: In this paper, a new control method for the parallel operation of inverters operating in an island grid or connected to an infinite bus is described, where each inverter supplies a current that is the result of the voltage difference between a reference ac voltage source and the grid voltage across a virtual complex impedance.
Journal ArticleDOI
Adaptive Decentralized Droop Controller to Preserve Power Sharing Stability of Paralleled Inverters in Distributed Generation Microgrids
TL;DR: In this paper, an adaptive decentralized droop controller of paralleled inverter-based distributed generation (DG) units is presented to preserve the power sharing stability, which is based on the static droop characteristics combined with an adaptive transient droop function.