Fig. 14

Transition between islanded and grid-connected modes. The switching between slanded and grid-connected modes is occurred at time 2.5 sec. The microsource dynamic responses including dc voltage tracking, frequency synchronization, the power sharing as well as ac voltage tracking (amplitudes at output terminals). The lines correspond to the microsources at: bus 3, ’–’, bus 6, ’- -’, bus 7, ’..’, bus 10, ’-.’. Moreover, the lines correspond to other microsources at: bus 4, ’ >-’, bus 5, ’+-’, bus 8, ’x-’, bus 9, ’o-’, bus 11,’*-’