%0 Journal Article %A Michael D Sankur %A Roel Dobbe %A Alexandra von Meier %A Daniel Arnold %B IEEE Transactions on Smart Grid %D 2020 %G eng %N 1 %P 884 - 894 %R 10.1109/TSG.2019.2950875 %T Model-Free Optimal Voltage Phasor Regulation in Unbalanced Distribution Systems %V 11 %8 01/2020 %! IEEE Trans. Smart Grid