TY - JOUR
T1 - Controllers for eliminating the ac components in the circulating current of modular multilevel converters
AU - Darus, R.
AU - Pou, Josep
AU - Konstantinou, G.
AU - Ceballos, Salvador
AU - Agelidis, V.G.
N1 - Publisher Copyright:
© The Institution of Engineering and Technology 2016.
PY - 2016/1/20
Y1 - 2016/1/20
N2 - Control of the circulating currents in a modular multilevel converter (MMC) is an integral part of its
operation as the circulating currents have a significant impact on the rating of the power devices, losses and also capacitor voltage ripples. This study proposes two methods to control the circulating currents in the phase-legs of the MMC to their minimum dc value through elimination of the low-order harmonic components in the circulating current. The first method acts directly on the ac harmonics of the circulating current allowing the dc component to establish naturally, whereas the second one directlym controls the current to its dc reference. Simulations and experimental results from a laboratory prototype demonstrate the operating principles of the two methods and validate their performance.
AB - Control of the circulating currents in a modular multilevel converter (MMC) is an integral part of its
operation as the circulating currents have a significant impact on the rating of the power devices, losses and also capacitor voltage ripples. This study proposes two methods to control the circulating currents in the phase-legs of the MMC to their minimum dc value through elimination of the low-order harmonic components in the circulating current. The first method acts directly on the ac harmonics of the circulating current allowing the dc component to establish naturally, whereas the second one directlym controls the current to its dc reference. Simulations and experimental results from a laboratory prototype demonstrate the operating principles of the two methods and validate their performance.
KW - power convertors;
KW - electric current control
KW - modular multilevel converters
KW - MMC
KW - ac harmonics
KW - capacitor voltage ripples
KW - circulating current control
KW - dc component
KW - laboratory prototype
KW - low-order harmonic components
KW - operating principles
KW - phase-legs
KW - power convertors;
KW - electric current control
KW - modular multilevel converters
KW - MMC
KW - ac harmonics
KW - capacitor voltage ripples
KW - circulating current control
KW - dc component
KW - laboratory prototype
KW - low-order harmonic components
KW - operating principles
KW - phase-legs
UR - http://www.scopus.com/inward/record.url?scp=84957884797&partnerID=8YFLogxK
U2 - 10.1049/iet-pel.2014.0930
DO - 10.1049/iet-pel.2014.0930
M3 - Article
VL - unknown
SP - 1
EP - 8
JO - unknown
JF - unknown
IS - 1
ER -