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Frequency regulation of electric power systems efficiency depends on response time and on power reserves for frequency regulation. As integration of non-dispatchable renewable generation in the power system results with increased need for power reserves from fast responding power units, the idea of using aggregated DC microgrids in frequency regulation is presented. Model proposed in this work is...
This paper presents a model of multiple DC microgrids with battery energy storage systems and demand response capability, taking part in primary frequency regulation of electrical power system. Although DC microgrids can contribute to stability and efficiency of frequency regulation, these complex systems may cause serious stability issues due to the imperfect communication. This work presents possible...
In this paper we propose a new decentralized control strategy applied to a DC Microgrid in order to manage the power delivery of storage devices into a common DC-link, avoiding high-bandwidth communication (HBC) between the storage devices (SD) and alternative sources. Batteries and Ultracapacitors (UC) are used as SD and the common DC-link is fed by alternative sources such as photovoltaic panels,...
This paper proposes a novel multi-terminal grid interface for the decentralized and integrated, unit-level protection of meshed direct current microgrids. In contrast to conventionally used external, non-unit protection or intelligent electronic devices, the integration of the proposed multi-terminal grid interface converts a meshed network into a peer-to-peer structure that offers additional degrees...
In a DC microgrid, several paralleled conversion systems are installed in distributed substations for transferring power from external grid to a DC microgrid. Droop control is used for the distributed load sharing among all the DC/DC converters. Considering the typical efficiency feature of power electronic converters, optimization method can be implemented in tertiary level for improving the overall...
This paper proposes a new algorithm for power flow analysis in droop controlled DC microgrids. By considering the droop control in the power flow analysis for the DC microgrid, when compared with traditional methods, more accurate analysis results can be obtained. The algorithm verification is carried out by comparing the calculation results with detailed time domain simulation results. With the droop...
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