Proceedings ArticleDOI
An improved droop control algorithm for load sharing and circulating current control for parallel DC-DC converters in standalone DC microgrid
Sijo Augustine,Mahesh K. Mishra,N. Lakshminarasamma +2 more
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TLDR
In this paper, the relationship between load sharing and circulating current for parallel connected dc-dc converters is discussed and a new figure of merit called Droop Index is introduced, which is a function of normalized current sharing difference and losses in the output side of the converters.Abstract:
This paper discuss the relationship between load sharing and circulating current for parallel connected dc-dc converters. In the proposed algorithm a new figure-of-merit called Droop Index is introduced, which is a function of normalized current sharing difference and losses in the output side of the converters. This algorithm minimizes the circulating current and current sharing difference between the converters based on the virtual resistance, R droop values. This also eliminates the trade-off between current sharing difference and voltage regulation. By calculating negative R droop values, the algorithm gives better performance and low voltage regulation. The detailed analysis and design procedure are explained for two dc-dc boost converters connected in parallel. The effectiveness of proposed method is verified using MATLAB simulation.read more
Citations
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Journal ArticleDOI
A Decentralized Current-Sharing Controller Endows Fast Transient Response to Parallel DC–DC Converters
TL;DR: In this article, a decentralized current-sharing control strategy is proposed to endow fast transient response to paralleled dc-dc converters systems, such as dc microgrids or distributed power systems.
Journal ArticleDOI
Predictive Control for Microgrid Applications: A Review Study
Ariel Villalon,Marco Rivera,Yamisleydi Salgueiro,Javier Munoz,Tomislav Dragicevic,Frede Blaabjerg +5 more
TL;DR: Predictive control appears as a very promising control scheme with several advantages for microgrid applications of different control levels and with adaptations of the models in order to include uncertainties to improve their performance and dynamics response.
Proceedings ArticleDOI
A Nine-Level Inverter for Single Phase PV Applications
TL;DR: A Single Phase Nine Level Inverter (SPNLI) using a coupled inductor has low switch count, fewer capacitors and better reliability, and MAT-LAB SIMULINK based simulation results are presented to validate the proposed topology.
Proceedings ArticleDOI
Control Strategy for a Battery Energy Storage System with Parallel Paths
Xiaoquan Xu,Shaahin Filizadeh +1 more
TL;DR: A new control strategy for assignment of power references to batteries in a parallel-connected energy storage system that allocates power to each battery according to its present states of charge and health and reduces the stress on the aged batteries is proposed.
Proceedings ArticleDOI
Modeling and control of multi-parallel connected inverters in microgrids
Ying Wu,Yanpeng Wu +1 more
TL;DR: In this paper, modeling and control of multi-parallel connected inverters are studied for microgrid and a novel decentralized communication-based droop controller is proposed for each energy source unit to reduce the circulating current and achieve the power sharing accuracy.
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
An Improved Droop Control Method for DC Microgrids Based on Low Bandwidth Communication With DC Bus Voltage Restoration and Enhanced Current Sharing Accuracy
TL;DR: In this article, a lowbandwidth communication (LBC)-based improved droop control method is proposed to improve the performance of the dc microgrid operation, which does not require a centralized secondary controller.
Journal ArticleDOI
Distributed Control to Ensure Proportional Load Sharing and Improve Voltage Regulation in Low-Voltage DC Microgrids
TL;DR: In this paper, a decentralized controller for DC microgrid is proposed to achieve high reliability, low-voltage regulation, and equal load sharing, utilizing low-bandwidth communication.
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Autonomous operation of hybrid microgrid with AC and DC sub-grids
TL;DR: 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.
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Renewable energy today and tomorrow
TL;DR: The technical status, cost, and applications of major renewable energy technologies and implications for increased adoption of renewables will be reviewed.