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
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Proceedings ArticleDOI
A Virtual Inertia Control Strategy of Interlinking Converters in Islanded Hybrid AC/DC Microgrid
TL;DR: A virtual inertia control strategy of interlinking converters (ILCs) in an islanded hybrid microgrid is proposed in this paper, which restrains the DC bus voltage fluctuation and enhances the inertia of the hybrid micro grid.
Journal ArticleDOI
Coordinated power control without AC voltage sensing and active power filtering using interlinking converter with reduced interlinking power flow in a droop controlled islanded hybrid AC‐DC microgrid
Distributed Optimal Power Sharing Strategy in an Islanded Hybrid AC/DC Microgrid to Improve Efficiency
TL;DR: In this article , the authors proposed a distributed power sharing strategy to achieve cost-minimized DGPS and efficiency-maximized IPS simultaneously, without any communication lines for DGs.
Proceedings ArticleDOI
Adaptive Droop Control of AC/DC Hybrid Micro-grid Interlinking Converter
Can Wang,Can Deng,Juerui Cao +2 more
TL;DR: An adaptive droop control strategy for AC/DC hybrid micro-grid interlinking interface is proposed that can not only reduce unnecessary power exchange while ensuring the bidirectional flow of power between AC and DC sub-grids, but also improve power transmission accuracy to realize a better compensation of the voltage deviation.
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.