Implementation of distributed power balancing strategy with a layer of supervision in a low-voltage DC microgrid

Low-voltage DC microgrids are gaining popularity due to the higher efficiency, reliability, lower costs and better compatibility with DC loads compared to their AC counterparts. One of the challenges associated with employing DC microgrids is to design and implement a reliable control algorithm that...

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Bibliographic Details
Main Authors: Mobarrez, Maziar, Bhattacharya, Subhashish, Fregosi, Daniel
Format: Conference Proceeding
Language:English
Subjects:
AC/DC Converter
Batteries
DC/DC converter
Distributed
hierarchical control
Inverters
Microgrid
Microgrids
Power Balancing
Reliability
Voltage control
Voltage Droop Control
Wind energy
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Summary:Low-voltage DC microgrids are gaining popularity due to the higher efficiency, reliability, lower costs and better compatibility with DC loads compared to their AC counterparts. One of the challenges associated with employing DC microgrids is to design and implement a reliable control algorithm that ensures all the power converters maintain the power balance in normal operating condition as well as emergency condition. In this paper, a novel power balancing strategy is proposed to harvest maximum power from the solar and minimize the effect of solar output variations on the AC power grid. Moreover, a layer of communication is proposed that can be added to the control algorithm to optimize the usage of battery energy storage systems (BESS) and compensate for voltage drop/rise due to the implementation of linear droop. The feasibility and effectiveness of the proposed power balancing strategy is verified by a lab-scale DC microgrid test bed.
ISSN:2470-6647
DOI:10.1109/APEC.2017.7930855