TY - JOUR
T1 - A Modified Switched-Capacitor Based Seventeen-Level Inverter With Reduced Capacitor Charging Spike for RES Applications
AU - Marangalu, Milad Ghavipanjeh
AU - Kurdkandi, Naser Vosoughi
AU - Hosseini, Seyed Hossein
AU - Tarzamni, Hadi
AU - Dahidah, Mohamed
AU - Sarhangzadeh, Mitra
N1 - Publisher Copyright:
Author
PY - 2023/8/7
Y1 - 2023/8/7
N2 - This paper presents a grid-connected system for renewable energy source (RES) applications. The proposed system consists of a modified switched-capacitor (SC) based multilevel inverter and a DC-DC flyback converter. By using the DC-DC flyback converter the voltages of DC-link capacitors are adjusted to the same values. This modified SC-based multilevel inverter has benefits like limited capacitor charging spike, reasonable size, power density, cost per output power, active and reactive power support, adjusted injected current to the grid, and reduced number of input power DC supplies. Two isolated DC sources are generated using a flyback converter to supply the SC-based inverter and increase the number of voltage levels produced at the output. In this topology, one of the most important problems of the switched capacitor, i.e., the occurrence of the inrush currents during charging capacitors, is solved by using a circuit unit that consists of an inductor with a parallel power diode in the capacitive charging current path. To confirm the performance of the presented structure, comprehensive experiments and comparisons are provided. In the experiments, the peak current control (PCC) method is applied to control both the active and reactive power injected into the grid by the modified 17-levels grid-connected inverter.
AB - This paper presents a grid-connected system for renewable energy source (RES) applications. The proposed system consists of a modified switched-capacitor (SC) based multilevel inverter and a DC-DC flyback converter. By using the DC-DC flyback converter the voltages of DC-link capacitors are adjusted to the same values. This modified SC-based multilevel inverter has benefits like limited capacitor charging spike, reasonable size, power density, cost per output power, active and reactive power support, adjusted injected current to the grid, and reduced number of input power DC supplies. Two isolated DC sources are generated using a flyback converter to supply the SC-based inverter and increase the number of voltage levels produced at the output. In this topology, one of the most important problems of the switched capacitor, i.e., the occurrence of the inrush currents during charging capacitors, is solved by using a circuit unit that consists of an inductor with a parallel power diode in the capacitive charging current path. To confirm the performance of the presented structure, comprehensive experiments and comparisons are provided. In the experiments, the peak current control (PCC) method is applied to control both the active and reactive power injected into the grid by the modified 17-levels grid-connected inverter.
KW - Buck converters
KW - Capacitors
KW - Inductors
KW - multilevel inverter
KW - Multilevel inverters
KW - photovoltaic systems
KW - Switched capacitor inverter
KW - Switches
KW - Switching circuits
KW - Topology
UR - http://www.scopus.com/inward/record.url?scp=85167780912&partnerID=8YFLogxK
U2 - 10.1109/OJPEL.2023.3302282
DO - 10.1109/OJPEL.2023.3302282
M3 - Article
AN - SCOPUS:85167780912
SN - 2644-1314
VL - 4
SP - 579
EP - 602
JO - IEEE Open Journal of Power Electronics
JF - IEEE Open Journal of Power Electronics
ER -
