A novel strategy to achieve distributed control and redundancy for input-series-output-parallel inverter system

Input-series-output-parallel (ISOP) inverter system is very suitable for high input voltage and high output current power conversion applications. Distributed control and redundancy are badly needed to improve system reliability, which is the crucial point of this topology. This paper firstly proposes a new solution dedicated to distributed configuration and the corresponding control strategy, i.e., the method entitled input voltage sharing combined with the phase synchronization of inductor current to achieve power balance. Then a hot-plugging scheme dedicated to distributed ISOP inverter system is put forward to actualize redundancy. Meanwhile, the timing sequence is introduced. Finally, the prototypes are fabricated in the lab and the experimental results are exploited to verify the effectiveness of the proposed methods.