Abstract
Reliability of the grid feeding or stand-alone inverter system is a concern. Apart from the power electronic switching devices, DC link capacitors have an impact on reliability of the whole system. Two different PWM switching schemes are analysed for a 3-level DC-DC converter connected to a single phase NPC inverter. To reduce the current stress on DC link capacitors, it is suggested to use inverter Output Coordinated PWM (OCP) for DC-DC converter. Analytical study and simulation is carried out to derive the current stress on DC link capacitors. It is shown that the capacitor I2R loss is reduced to half in the proposed scheme, which improves the capacitor operational life time. With the reduction in current stress, the required number of parallel DC link capacitors can be reduced. The study and conclusion drawn can be extended to other half-bridge type single phase inverter topologies.
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.
