TY - JOUR
T1 - Cascaded Voltage Control for Electric Springs with DC-Link Film Capacitors
AU - Wang, Ming Hao
AU - He, Yufei
AU - Yang, Tianbo
AU - Jia, Youwei
AU - Xu, Zhao
N1 - Funding Information:
Manuscript received May 28, 2019; revised August 28, 2019 and October 31, 2019; accepted December 7, 2019. Date of publication December 25, 2019; date of current version November 5, 2020. This work was supported in part by the National Natural Science Foundation of China (NSFC) under Grant 71971183 and Grant 71931003 and in part by the Hong Kong Research Grant Council under the Theme-based Project T23-701/14-N. Recommended for publication by Associate Editor Sanjib K. Panda. (Corresponding author: Yufei He.) Ming-Hao Wang and Yufei He are with the Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong (e-mail: [email protected]; [email protected]).
Publisher Copyright:
© 2013 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/12
Y1 - 2020/12
N2 - For the conventional configuration of the single-phase electric springs, the electrolytic capacitor (E-cap) is required for buffering the double-line-frequency dc-link power. This demands large capacitance and constant average dc-link voltage for achieving sufficiently low-voltage ripples of the E-cap, which renders low efficiency and poor reliability of the ES. To address these issues, a cascaded voltage control scheme is proposed in this article. The proposed control scheme enables large fluctuations of the dc-link voltage so that the film capacitor (F-cap), which is of smaller capacitance and higher reliability, can be applied. In addition, the proposed control scheme can adaptively adjust the average dc-link voltage for achieving the minimum power loss of the ES. The quasi-steady-state and steady-state models of the electric-spring-based smart load are developed. The optimum average dc-link voltage for achieving the minimum power loss is analytically derived. The functionality and loss reduction capability of the proposed controller are verified through hardware experiments and simulations.
AB - For the conventional configuration of the single-phase electric springs, the electrolytic capacitor (E-cap) is required for buffering the double-line-frequency dc-link power. This demands large capacitance and constant average dc-link voltage for achieving sufficiently low-voltage ripples of the E-cap, which renders low efficiency and poor reliability of the ES. To address these issues, a cascaded voltage control scheme is proposed in this article. The proposed control scheme enables large fluctuations of the dc-link voltage so that the film capacitor (F-cap), which is of smaller capacitance and higher reliability, can be applied. In addition, the proposed control scheme can adaptively adjust the average dc-link voltage for achieving the minimum power loss of the ES. The quasi-steady-state and steady-state models of the electric-spring-based smart load are developed. The optimum average dc-link voltage for achieving the minimum power loss is analytically derived. The functionality and loss reduction capability of the proposed controller are verified through hardware experiments and simulations.
KW - AC microgrid
KW - electric springs (ESs)
KW - reactive power control
KW - voltage control
UR - http://www.scopus.com/inward/record.url?scp=85077269323&partnerID=8YFLogxK
U2 - 10.1109/JESTPE.2019.2962238
DO - 10.1109/JESTPE.2019.2962238
M3 - Journal article
AN - SCOPUS:85077269323
SN - 2168-6777
VL - 8
SP - 3982
EP - 3994
JO - IEEE Journal of Emerging and Selected Topics in Power Electronics
JF - IEEE Journal of Emerging and Selected Topics in Power Electronics
IS - 4
M1 - 8943323
ER -