Abstract
This paper suggested a single-phase cross-connected half-bridges multilevel inverter (cchb-mli) topology for static synchronous compensator (statcom) applications. The proposed mli structure consists of cross-connected multilevel cells connected in series with a more optimized number of devices to synthesize a higher number of voltage steps. Each cell in the structure consists of a set of switches and a dc-capacitor. Typically, when several dc-capacitors are used in an inverter, the dc voltages fluctuation occurs due to tolerance between passive element and asymmetric switch losses. A dual-loop control technique has been proposed with level-shifted pulse width modulation pwm to overcome these issues. The proposed methodology balances the dc-voltages using a proportional-integral controller by adjusting the switch duty cycle. The control method helps offset the issue of aggravated fluctuation while preserving the delivered reactive power distributed equally among the dc-capacitors at the same time. A thorough comparison is made between the proposed inverter concerning the number of components and efficiency to demonstrate the effectiveness of previous topologies. Moreover, a simulation model built in simulink and experimental results take from laboratory prototype to confirm the effectiveness of proposed structure and its control technique.
Highlights
Multilevel inverters (MLIs) technology has become an important developing field in power electronics and has become a preferred choice for a several medium and high-power applications [1]
The proposed approach has been applied to five-level cross-connected half-bridges inverter, it can be extended to any number of voltage steps of CCHB - MLI with relative ease
That four switches in the proposed topology operate with high switching frequency ( f HIGH ) and it switched at VDC voltage, while two power switches are controlled by low frequency ( f LOW ) and switched at 2VDC voltage
Summary
Multilevel inverters (MLIs) technology has become an important developing field in power electronics and has become a preferred choice for a several medium and high-power applications [1]. Introduced a cross-connected half-bridge structure in [19] This results in the mitigation of individual switch stress, ease of DC voltage balancing control, and intrinsic DC fault tolerance capacity relative to certain other topologies. This topology’s main benefits are that it is more practical due to its simple structure, high reliability, modularity, and efficient to any number of voltage levels. The proposed approach has been applied to five-level cross-connected half-bridges inverter, it can be extended to any number of voltage steps of CCHB - MLI with relative ease.
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
