期刊
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
卷 10, 期 1, 页码 837-845出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JESTPE.2021.3095125
关键词
Topology; Switches; Inverters; Inductors; Capacitors; Leakage currents; Boosting; Boost inverter; leakage current; multilevel inverter; self-voltage balancing; switched capacitor (SC)
资金
- Renewable Energy Laboratory, Prince Sultan University, Riyadh, Saudi Arabia [PSU/SR-2021-001]
This article presents a new topology for solar photovoltaic inverters that integrates a boost converter, reducing component count and providing soft charging. By combining inductors and capacitors, a higher gain is achieved.
In solar photovoltaic (PV) inverters, a separate boost converter is often used to boost the input voltage, increasing the number of components, cost and weight of the systems, and losses. To address this issue, a new common ground-type (CGT) transformer-less five-level (5L) switched-capacitor (SC) inverter topology with integrated boost converter is presented in this article. The proposed topology is capable of soft charging the floating SC and has reduced component count. The careful amalgamation of the inductor-based boosting and SC-based boosting results in a higher gain. Unlike the existing CGT 5L inverters, the proposed topology provides a charging state for the SC in every switching cycle for 5L operation. The benefits of the proposed topology are highlighted and compared with the other recent SC inverter topologies. The detailed operation of the proposed topology is supported with necessary mathematical analysis. The simulation and experimental results are presented to validate the feasibility of the proposed topology.
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