Abstract
This paper proposes a novel topology, named the switched-capacitor-inductor active-switched boost inverter (SCL-ASBI), based on a switched boost inverter (SBI). The proposed SCL-ASBI allows a high voltage gain with fewer components used in the impedance network. It can be extended to an n-cell by adding one inductor, one diode, and two capacitors for further improving the boost capability. A comparative analysis between the proposed SCL-ASBI topology and four different topologies based on the SBI is presented. The closed-loop output voltage control scheme of the SCL-ASBI is suggested to linearly control the ac output voltage in a wide range. The extended-boost SCL-ASBI (EB/SCL-ASBI) topology, implemented by adding one cell to the SCL-ASBI, is introduced to achieve a higher voltage gain. Both the simulation studies and the experimental results obtained from a prototype built in the laboratory are carried out to verify the theoretical analysis and performance of the proposed topologies.
Highlights
The quasi-Z-source inverter is an attractive choice in renewable energy generation applications due to its boost capability in a single power conversion stage and the continuous dc input current [1]
The capacitor-assisted switched capacitor extended boost ZSI (CSC-EB-ZSI) proposed in [28] is implemented by adding one switch and one diode to the capacitor-assisted extended boost quasi-Z-source inverter (qZSI) (CEB-qZSI) [9] to increase the voltage conversion ratio. Another possible solution to further increase the voltage gain is to apply the multicell scheme, which can be implemented by connecting n number of cells in a cascade, to the topologies based on the active switched boost inverters such as: the active-switched-capacitor/switched-inductor qZSI (ASC/SL qZSI) [29], continuous input current qZSI (CC-qZSI) [30], and active-switched-capacitor qZSI (ASC-qZSI) [31]
COMPARATIVE ANALYSIS WITH THE SAME TYPE OF TOPOLOGIES The comparative analysis is performed in terms of the number of components, boost factor, voltage and current stresses of the proposed SCL-ASBI topology with the four other switched boost inverter (SBI)-based topologies such as the Switched-ZSI [23], cASLBqZSI [26], EB/ASN-qZSI [27], and CSC-EB-ZSI [28]
Summary
The quasi-Z-source inverter (qZSI) is an attractive choice in renewable energy generation applications due to its boost capability in a single power conversion stage and the continuous dc input current [1]. To achieve higher voltage gain, several topologies have been implemented by inserting additional inductors, capacitors, and diodes into the impedance network based on the (quasi-) Z-source inverter, as introduced in [7]–[14]. The capacitor-assisted switched capacitor extended boost ZSI (CSC-EB-ZSI) proposed in [28] is implemented by adding one switch and one diode to the capacitor-assisted extended boost qZSI (CEB-qZSI) [9] to increase the voltage conversion ratio Another possible solution to further increase the voltage gain is to apply the multicell scheme, which can be implemented by connecting n number of cells in a cascade, to the topologies based on the active switched boost inverters such as: the active-switched-capacitor/switched-inductor qZSI (ASC/SL qZSI) [29], continuous input current qZSI (CC-qZSI) [30], and active-switched-capacitor qZSI (ASC-qZSI) [31].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
