抄録
In this paper, a novel H-bridge multi-cell inverter system for energy storage will be proposed. A large capacity 100MW SMES system and a smaller 10MW system which is the experimental model of the 100MW system have been designed and evaluated. These systems handle active power and also reactive power. During the simulation study of these systems, presence of unstable phenomena of the d. c. voltage of the cells have emerged. In this paper, the contents of the trial design, the causes and characteristics of the unstable phenomena and solutions will be presented.
