For islanded microgrids, droop-based control concepts have been developed both in single and three-phase variants. The three-phase controllers often assume a balanced network; hence, unbalance sharing and/or mitigation remains a challenging issue. Therefore, in this paper, unbalance is considered in a three-phase islanded microgrid in which the distributed generation (DG) units are operated by ...

The modular multilevel photovoltaic (PV) converter can achieve independent power control and help to increase the efficiency of system. However, output among PV modules is unbalanced, which will result in loss system if not properly controlled. This paper first introduces a scheme adjust distribution dc grid, ac grid modules, presents mathematical bases unbalanced strategy. voltage ripple MMC s...

This paper proposes a competent and effective scheme to enhance the ride-through capability of DFIGbased wind turbines under unbalanced voltage dip conditions. The proposed method is realized through joint use of the rotor-side converter control and a three-phase stator damping resistor (SDR) placed in series with the stator windings. By means of an asymmetrical SDR idea, during the unbalanced ...

Recently, since single phase loads and dispersed generators become widespread, unbalanced voltage in distribution line become an important problem for voltage management. One of them is that the control of a conventional voltage regulation device become difficult because of the difference of the magnitude of the line voltages, the other one is increase of 3rd harmonic voltages. The authors prop...