TITLE

Dynamic voltage restorer based on multilevel inverter with adjustable dc-link voltage

AUTHOR(S)
Babaei, Ebrahim; Kangarlu, Mohammad Farhadi; Sabahi, Mehran
PUB. DATE
March 2014
SOURCE
IET Power Electronics;Mar2014, Vol. 7 Issue 3, p576
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Dynamic voltage restorer (DVR) is a power electronic converter-based custom power device used to compensate for voltage variations. The inverter used in the DVR structure can have different topologies. Multilevel inverters are a good candidate to be used in the DVR structure especially in higher voltage level. This study proposes a new scheme for DVR based on a multilevel inverter. In the proposed DVR, a dc-dc converter is attached to the multilevel inverter. The dc-link voltage is regulated by the dc-dc converter considering the voltage sag magnitude. In this way, the output voltage of the multilevel inverter has always its maximum possible number of levels. This results in better quality of output voltage in both deep and shallow voltage sags. It is important to emphasise that the existing inverter-based DVR topologies do not have this capability. Also, in the proposed DVR, there is no need for an output filter. Moreover, the fundamental frequency control method for the multilevel inverter can be used instead of pulse width modulation-based methods. This can result in lower switching losses and lower switching stresses. The mathematical analysis of the operation range of the proposed DVR is given in detail. The simulation results using Power System Computer Aided Design/Electromagnetic Transient including DC (PSCAD/EMTDC) as well as the experimental results from a laboratory prototype verify the proposed DVR scheme.
ACCESSION #
101626232

 

Related Articles

  • Vector-optimised harmonic elimination for single-phase pulse-width modulation inverters/converters. Hadji, S.; Touhami, O.; Goodman, C.J. // IET Electric Power Applications;May2007, Vol. 1 Issue 3, p423 

    A new approach for calculating single-phase inverters/converters-optimised pulse-width modulation (PWM) switching angles for harmonic and voltage control is proposed. This approach takes into account the DC-link voltage ripple, due to the finite DC-link capacitance, in the optimised...

  • Solution trajectories for selective harmonic elimination pulse-width modulation for seven-level waveforms: analysis and implementation. Konstantinou, G.S.; Dahidah, M.S.A.; Agelidis, V.G. // IET Power Electronics;Jan2012, Vol. 5 Issue 1, p22 

    A detailed analysis of a seven-level selective harmonic elimination pulse-width modulation method suitable for multilevel DC-AC converters is presented in this study. Solution trajectories that cover the normal range of modulation indices typical for the operation of multilevel inverters are...

  • Single-phase multilevel inverter based on switched-capacitor structure. Bac-Bien Ngo; Minh-Khai Nguyen; Jae-Hong Kim; Firuz Zare // IET Power Electronics;2018, Vol. 11 Issue 11, p1 

    This study proposes a new topology for multilevel inverters based on switched-capacitor structure. The proposed topology uses capacitor charged/discharged characteristic to boost the output voltage without employing magnetic elements. The proposed circuit configuration has fewer components,...

  • Theoretical harmonic analysis of cascaded H-bridge inverter under hybrid pulse width multilevel modulation. Jiaomin Liu; Yuwei Sun; Yonggang Li; Chao Fu // IET Power Electronics;2016, Vol. 9 Issue 14, p2714 

    This study investigates the analytical approach for determining the spectral components of a hybrid pulse width modulation (HPWM) strategy for cascaded H-bridge (CHB) multilevel inverters. By decomposing the HPWM voltage into a staircase waveform and a non-sinusoidal pulse width modulation...

  • Space vector pulse-width modulation scheme for multilevel voltage inverters with duty cycle calculation based on relative vector distances. Ovalle, Andres; Ramos, Gustavo // IET Power Electronics;Apr2014, Vol. 7 Issue 4, p829 

    In this study, a control scheme for multilevel inverters is formulated employing space vector pulse-width modulation. The notable formulation bases the duty cycle calculation on relative distances among constructive vectors provided by the lineneutral voltage levels of the converter topology....

  • Selective harmonic mitigation-pulse-width modulation technique with variable DC-link voltages in single and three-phase cascaded H-bridge inverters. Moeini, Amirhossein; Iman-Eini, Hossein; Bakhshizadeh, Mohamadkazem // IET Power Electronics;Apr2014, Vol. 7 Issue 4, p924 

    There are different modulation techniques that can be used in medium-voltage and high-power electronic converters, but a few of them provide high efficiency and satisfy power quality requirements. This study presents a modified selective harmonic mitigation pulse-width modulation (SHM-PWM)...

  • Coordinated Control of Dual PWM Converter for Elevator Drives. Han Shuang; Zheng Jiong; Luo Zhiqun; Wan Jianru // Elevator World;Jul2012, Vol. 60 Issue 7, p50 

    The article focuses on the coordinated control of dual pulse-width modulation (PWM) converters integrating elevator drives with energy feedback. It states that the energy difference between the rectifier and inverter per unit time can decrease if the power flow of the rectifier equals the...

  • Analysis and Implementation of a Dual ZVS Flyback Converter. Bor-Ren Lin; Ming-Hung Yu // International Review of Electrical Engineering;May/Jun2010 Part A, Vol. 5 Issue 3, p812 

    This paper presents a zero voltage switching (ZVS) converter for requiring low output current ripple. The proposed converter includes two active-clamp flyback converters to have well regulated and smooth dc output without the need the output filter inductor. Two interleaved parts use the primary...

  • Capacitor static voltage balance based on auxiliary-power supply pulse width control for MMC. Longfei Luo; Yanbin Zhang; Lixin Jia; Ningning Yang; Lixia Yang; Huihui Zhang // IET Power Electronics;2018, Vol. 11 Issue 11, p1 

    As one of the most potential converter topologies, modular multilevel converter (MMC) is widely used in high-voltage direct current (HVDC) transmission systems. The capacitor static voltage imbalance during HVDC system start-up stage has become a key issue. This study presents a new capacitor...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics