TY - GEN
T1 - A Novel Double-Line-Frequency Ripple Suppression Method for Single Phase DC-AC Converter Based on Three-Level Topology
AU - Huang, Yanfei
AU - Zhang, Yan
AU - Li, Xinying
AU - Fang, Peng
AU - Liu, Jinjun
PY - 2018/8/27
Y1 - 2018/8/27
N2 - For single-phase DC-AC power conversion, power decoupling is always required due to the existence of double-line-frequency ripple caused by the instantaneous unbalanced power between AC and DC side. The typical power decoupling method utilizes a large electrolytic capacitor and consequently increases the passive components requirement. The active power decoupling scheme introduces an additional low power converter to compensate the ripple, which inevitably increases the system cost and control complexity. To overcome these drawbacks, this paper proposes a novel suppression method based on three-level topology. By optimizing the capacitance design and improved control algorithm, the instantaneous unbalanced power is dynamically redistributed between two series connected intermediate capacitors in order to make the capacitor voltage ripple complementary to each other. Thus the de-link voltage ripple can be reduced to a large extent. Simulation verifies the correctness and effectiveness of the new suppression method.
AB - For single-phase DC-AC power conversion, power decoupling is always required due to the existence of double-line-frequency ripple caused by the instantaneous unbalanced power between AC and DC side. The typical power decoupling method utilizes a large electrolytic capacitor and consequently increases the passive components requirement. The active power decoupling scheme introduces an additional low power converter to compensate the ripple, which inevitably increases the system cost and control complexity. To overcome these drawbacks, this paper proposes a novel suppression method based on three-level topology. By optimizing the capacitance design and improved control algorithm, the instantaneous unbalanced power is dynamically redistributed between two series connected intermediate capacitors in order to make the capacitor voltage ripple complementary to each other. Thus the de-link voltage ripple can be reduced to a large extent. Simulation verifies the correctness and effectiveness of the new suppression method.
KW - DC-AC Converter
KW - Double-line-frequency Ripple Suppression
KW - Power Decoupling Method
UR - http://www.scopus.com/inward/record.url?scp=85053841951&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85053841951&partnerID=8YFLogxK
U2 - 10.1109/PEDG.2018.8447872
DO - 10.1109/PEDG.2018.8447872
M3 - Conference contribution
AN - SCOPUS:85053841951
SN - 9781538667057
T3 - 2018 9th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2018
BT - 2018 9th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 9th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2018
Y2 - 25 June 2018 through 28 June 2018
ER -