超级电容器在微型电网中的应用

总发电容量小于总负荷需求的微型电网（微网），因外部故障而进入孤岛运行时，为了保护重要负荷必须切除次要负荷。如果外部故障为瞬时性故障，则在短时间内微网又会因瞬时故障消失而重合到主网并重启次要负荷，从供电稳定性和经济性的角度来看对次要负荷不利。因此，提出在外部故障后，用超级电容器向孤岛运行的微网提供短时功率缺额，维持所有负荷并等待重合于主网。文中用理论和仿真证明了此方法的合理性。

Application of the Super-capacitor in a MicroGrid

The minor load has to be cut off in an isolated MicroGrid which cannot supply all loads when the MicroGrid comes into the island operation mode.As MicroGrid will be re-connected to the main grid and the minor load will be restarted after the disappearance of the transient fault,cutting off the minor load is unsuitable.So the super-capacitor is proposed to compensate for the shortage of power in the MicroGrid that is interrupted by the transient fault and maintain all the loads until re-connection to the main grid.This method is proved rational by theory and simulation.