TY - GEN
T1 - A new topology and control strategy for centralized ride-through capability of wind farm
AU - Hong, Lucheng
AU - Jiang, Qirong
AU - Wang, Liang
AU - Du, Wei
PY - 2012
Y1 - 2012
N2 - As the penetration of large-scale grid-connected wind farms increasing year by year, low voltage ride-through (LVRT) capability has been an extremely important criterion for grid-connected wind farms required by many countries to improve power quality at grid fault. A new dynamic voltage restorer (DVR) topology based on modular multilevel converters (MMC) is proposed in this paper to improve LVRT capability of wind farms. Related control strategies and pulse width modulation (PWM) method are also proposed, to keep wind farm terminal voltage normal and voltages of MMC fly-capacitors in balance during voltage sag period; a special energy sharing topology is applied on DC sides of the device, three phase DC bus voltages can kept in balance through the given control strategy. PSCAD/EMTDC simulations are carried out to prove the effectiveness of the proposed technique and some related conclusions and comments are summarized.
AB - As the penetration of large-scale grid-connected wind farms increasing year by year, low voltage ride-through (LVRT) capability has been an extremely important criterion for grid-connected wind farms required by many countries to improve power quality at grid fault. A new dynamic voltage restorer (DVR) topology based on modular multilevel converters (MMC) is proposed in this paper to improve LVRT capability of wind farms. Related control strategies and pulse width modulation (PWM) method are also proposed, to keep wind farm terminal voltage normal and voltages of MMC fly-capacitors in balance during voltage sag period; a special energy sharing topology is applied on DC sides of the device, three phase DC bus voltages can kept in balance through the given control strategy. PSCAD/EMTDC simulations are carried out to prove the effectiveness of the proposed technique and some related conclusions and comments are summarized.
KW - dynamic voltage restorer
KW - modular multilevel converter
KW - voltage sag
KW - wind power
UR - http://www.scopus.com/inward/record.url?scp=84872982150&partnerID=8YFLogxK
U2 - 10.1109/IECON.2012.6389334
DO - 10.1109/IECON.2012.6389334
M3 - Conference contribution
AN - SCOPUS:84872982150
SN - 9781467324212
T3 - IECON Proceedings (Industrial Electronics Conference)
SP - 3516
EP - 3520
BT - Proceedings, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society
T2 - 38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012
Y2 - 25 October 2012 through 28 October 2012
ER -