Flying capacitor multicell converter based dynamic voltage restorer

Arash Khoshkbar Sadigh, Seyed Hossein Hosseini, S. Masoud Barakati, Gevorg Gharehpetian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

28 Scopus citations


One of the major power quality problems in distribution systems are voltage sags. This paper deals with a dynamic voltage restorer (DVR) as one of the different solutions to compensate these sags and protect sensitive loads. However, the quality of DVR output voltage itself, such as THD, is important. So, in this paper a configuration of DVR based on flying capacitor multicell (FCM) converter is proposed. The main properties of FCM converter, which causes increase in the number of output voltage levels, are transformer-less operation and natural self-balancing of flying capacitors voltages. The proposed DVR consists of a set of series converter and shunt rectifier connected back-toback. To guarantee the proper operation of shunt rectifier and maintaining the dc link voltage at the desired value, which results in suitable performance of DVR, the DVR is characterized by installing the series converter on the sourceside and the shunt rectifier on the load-side. Also, the pre-sag compensation strategy and the proposed voltage sag detection and DVR reference voltages determination methods based on synchronous reference frame (SRF) are adopted as the control system. The proposed DVR is simulated using PSCAD/EMTDC software and simulation results are presented to validate its effectiveness.

Original languageEnglish (US)
Title of host publication41st North American Power Symposium, NAPS 2009
StatePublished - 2009
Event41st North American Power Symposium, NAPS 2009 - Starkville, MS, United States
Duration: Oct 4 2009Oct 6 2009

Publication series

Name41st North American Power Symposium, NAPS 2009


Other41st North American Power Symposium, NAPS 2009
Country/TerritoryUnited States
CityStarkville, MS

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology


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