TY - GEN
T1 - Submodule power losses balancing algorithms for the modular multilevel converter
AU - Picas, R.
AU - Pou, J.
AU - Zaragoza, J.
AU - Watson, A.
AU - Konstantinou, G.
AU - Ceballos, S.
AU - Clare, J.
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/12/21
Y1 - 2016/12/21
N2 - Tolerance and component aging can cause significant differences in the capacitance values of the submodules (SMs) in a modular multilevel converter (MMC). Depending on the modulation technique, capacitance mismatches may produce uneven switching transitions of the SMs, hence imbalances in the power losses that can lead to reliability problems. In this paper, a new algorithm that helps to achieve evenly distributed switching and conduction losses within the converter SMs is presented. The proposed algorithm is based on a modification of the common voltage balancing algorithms, balancing a weighted function of voltage and losses. Even distribution of power losses is achieved at the cost of slightly increasing the capacitor voltage ripples. The effectiveness of the strategy has been demonstrated by simulation results of a high-power grid-connected MMC.
AB - Tolerance and component aging can cause significant differences in the capacitance values of the submodules (SMs) in a modular multilevel converter (MMC). Depending on the modulation technique, capacitance mismatches may produce uneven switching transitions of the SMs, hence imbalances in the power losses that can lead to reliability problems. In this paper, a new algorithm that helps to achieve evenly distributed switching and conduction losses within the converter SMs is presented. The proposed algorithm is based on a modification of the common voltage balancing algorithms, balancing a weighted function of voltage and losses. Even distribution of power losses is achieved at the cost of slightly increasing the capacitor voltage ripples. The effectiveness of the strategy has been demonstrated by simulation results of a high-power grid-connected MMC.
KW - Capacitor voltage ripples
KW - Modular multilevel converter
KW - Power losses
KW - Reliability improvement
UR - http://www.scopus.com/inward/record.url?scp=85010046820&partnerID=8YFLogxK
U2 - 10.1109/IECON.2016.7793381
DO - 10.1109/IECON.2016.7793381
M3 - Conference contribution
AN - SCOPUS:85010046820
T3 - IECON Proceedings (Industrial Electronics Conference)
SP - 5064
EP - 5069
BT - Proceedings of the IECON 2016 - 42nd Annual Conference of the Industrial Electronics Society
PB - IEEE Computer Society
T2 - 42nd Conference of the Industrial Electronics Society, IECON 2016
Y2 - 24 October 2016 through 27 October 2016
ER -