TY - JOUR
T1 - Hybrid Electric Springs for Grid-Tied Power Control and Storage Reduction in AC Microgrids
AU - Wang, Ming Hao
AU - Yang, Tian Bo
AU - Tan, Siew Chong
AU - Hui, S. Y.
N1 - Funding Information:
Manuscript received February 11, 2018; revised April 26, 2018; accepted June 29, 2018. Date of publication July 8, 2018; date of current version February 20, 2019. This work was supported by the Hong Kong Research Grant Council under the Theme-based Project T23-701/14-N. Recommended for publication by Associate Editor Yasser A.-R. I. Mohamed. (Corresponding author: Ming-Hao Wang.) M.-H. Wang, T.-B. Yang, and S.-C. Tan are with the Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong (e-mail:, [email protected]; [email protected]; [email protected]).
Publisher Copyright:
© 1986-2012 IEEE.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/4
Y1 - 2019/4
N2 - The renewable generations (RGs) are conventionally interfaced with the utility grid through battery energy storage systems (BESS). In this cascaded configuration of the grid-connected inverter, battery, and RG, the power of the battery is passively governed by the power difference between the RG and the grid. This compromises the state-of-charge (SoC) control of the battery and increases the storage capacity. To address this issue, a hybrid electric spring (HES), which is integrated with the RG and noncritical load (NCL), is proposed in this paper for the grid-tied power control and reduction of battery storage capacity in ac microgrids. Such an integrated configuration enables a flexible control of the power flow among battery, NCL, and grid. On top of that, the proposed HES can achieve an extended operating region of grid-tied power control compared with the conventional BESS and the existing electric springs. The operating principle, steady-state analysis, and control design of the HES are discussed. The functions of the grid-tied power control and battery SoC control are verified experimentally and through simulations.
AB - The renewable generations (RGs) are conventionally interfaced with the utility grid through battery energy storage systems (BESS). In this cascaded configuration of the grid-connected inverter, battery, and RG, the power of the battery is passively governed by the power difference between the RG and the grid. This compromises the state-of-charge (SoC) control of the battery and increases the storage capacity. To address this issue, a hybrid electric spring (HES), which is integrated with the RG and noncritical load (NCL), is proposed in this paper for the grid-tied power control and reduction of battery storage capacity in ac microgrids. Such an integrated configuration enables a flexible control of the power flow among battery, NCL, and grid. On top of that, the proposed HES can achieve an extended operating region of grid-tied power control compared with the conventional BESS and the existing electric springs. The operating principle, steady-state analysis, and control design of the HES are discussed. The functions of the grid-tied power control and battery SoC control are verified experimentally and through simulations.
KW - Electric spring (ES)
KW - energy storage reduction
KW - power control
KW - renewable energy
KW - smart grid
UR - http://www.scopus.com/inward/record.url?scp=85049677903&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2018.2854569
DO - 10.1109/TPEL.2018.2854569
M3 - Journal article
AN - SCOPUS:85049677903
SN - 0885-8993
VL - 34
SP - 3214
EP - 3225
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 4
M1 - 8408764
ER -
