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Title: A battery/ultracapacitor hybrid energy storage system for implementing the power management of virtual synchronous generators
Authors: Fang, Jingyang
Tang, Yi
Li, Hongchang
Li, Xiaoqiang
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Energy Storage System (ESS)
Issue Date: 2017
Source: Fang, J., Tang, Y., Li, H., & Li, X. (2018). A battery/ultracapacitor hybrid energy storage system for implementing the power management of virtual synchronous generators. IEEE Transactions on Power Electronics, 33(4), 2820-2824. doi:10.1109/TPEL.2017.2759256
Series/Report no.: IEEE Transactions on Power Electronics
Abstract: Renewable energy sources (RESs) have been extensively integrated into modern power systems to meet the increasing worldwide energy demand as well as reduce greenhouse gas emission. As a result, the task of frequency regulation previously provided by synchronous generators is gradually taken over by power converters, which serve as the interface between the power grid and RESs. By regulating power converters as virtual synchronous generators (VSGs), they can exhibit similar frequency dynamic response. However, unlike synchronous generators, power converters are incapable of absorbing/delivering any kinetic energy, which necessitates extra energy storage systems (ESSs). Nonetheless, the implementation and coordination control of ESSs in VSGs have not been investigated by previous research. To fill this research gap, this letter proposes a hybrid ESS (HESS) consisting of a battery and an ultracapacitor to achieve the power management of VSGs. Through proper control, the ultracapacitor automatically tackles the fast-varying power introduced by inertia emulation while the battery implements the remaining parts of a VSG and only compensates for relatively long-term power fluctuations with slow dynamics. In this way, the proposed HESS allows reduction of the battery power fluctuations along with its changing rate. Finally, experimental results are presented to validate the proposed concept.
ISSN: 0885-8993
DOI: 10.1109/TPEL.2017.2759256
Schools: School of Electrical and Electronic Engineering 
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at:
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
ERI@N Journal Articles

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