A configuration of storage system for DC microgrids
File(s)
Accepted version
Author(s)
Wang, MH
Tan, SC
Lee, CK
Hui, SYR
Type
Journal Article
Abstract
IEEE Battery energy storage systems (BESS) are often adopted to buffer the difference between the intermittent solar power and load demand in power grids. The costs of such systems increase as the required energy storage increases. In this paper, a new configuration comprising the photovoltaic (PV) panel, a series DC electric spring (series ES) and non-critical load is proposed to reduce the battery storage capacity in DC microgrids that have substantial PV installations. This arrangement forms a PV-embedded series DC electric spring (PVES). An optimization method considering the minimization of electricity bills of the DC microgrids is included to size the storage capacity and to determine the rating of the PV connected to the series ES. Both experiments on a 48 V isolated DC grid and simulations on a 400 kVA grid-connected DC microgrid have been conducted to verify the storage reduction feature of the PVES. Both sets of results show that the PVES can tackle the intermittency of the solar power with a smaller storage capacity than that typically required in DC grids with PV installations.
Date Issued
2017-07-07
Date Acceptance
2017-07-01
Citation
IEEE Transactions on Power Electronics, 2017, 33 (5), pp.3722-3733
ISSN
0885-8993
Publisher
Institute of Electrical and Electronics Engineers
Start Page
3722
End Page
3733
Journal / Book Title
IEEE Transactions on Power Electronics
Volume
33
Issue
5
Copyright Statement
© 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.
Subjects
0906 Electrical And Electronic Engineering
Electrical & Electronic Engineering
Publication Status
Published