Record Details

Distributed Control to Ensure Proportional Load Sharing and Improve Voltage Regulation in Low-Voltage DC Microgrids

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Title Distributed Control to Ensure Proportional Load Sharing and Improve Voltage Regulation in Low-Voltage DC Microgrids
 
Creator ANAND, S
FERNANDES, BG
GUERRERO, JM
 
Subject DC microgrid
droop controller
load sharing
stability analysis
NO CONTROL INTERCONNECTIONS
PARALLEL INVERTERS
ENERGY MANAGEMENT
CONTROL STRATEGY
DROOP CONTROL
CONVERTERS
SYSTEMS
OPERATION
AC
GENERATION
 
Description DC microgrids are gaining popularity due to high efficiency, high reliability, and easy interconnection of renewable sources as compared to the ac system. Control objectives of dc microgrid are: 1) to ensure equal load sharing (in per unit) among sources; and 2) to maintain low-voltage regulation of the system. Conventional droop controllers are not effective in achieving both the aforementioned objectives simultaneously. Reasons for this are identified to be the error in nominal voltages and load distribution. Though centralized controller achieves these objectives, it requires high-speed communication and offers less reliability due to single point of failure. To address these limitations, this paper proposes a new decentralized controller for dc microgrid. Key advantages are high reliability, low-voltage regulation, and equal load sharing, utilizing low-bandwidth communication. To evaluate the dynamic performance, mathematical model of the scheme is derived. Stability of the system is evaluated by eigenvalue analysis. The effectiveness of the scheme is verified through a detailed simulation study. To confirm the viability of the scheme, experimental studies are carried out on a laboratory prototype developed for this purpose. Controller area network protocol is utilized to achieve communication between the sources.
 
Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
 
Date 2014-10-17T05:40:58Z
2014-10-17T05:40:58Z
2013
 
Type Article
 
Identifier IEEE TRANSACTIONS ON POWER ELECTRONICS, 28(4)1900-1913
http://dx.doi.org/10.1109/TPEL.2012.2215055
http://dspace.library.iitb.ac.in/jspui/handle/100/16092
 
Language en