A photovoltaic generation system with standby power

Aiming at the defects of two kinds of current main operation modes in photovoltaic power generation system, a power supply system with backup power and a control method based on feedback tracking of local load power supply system are put forward. The control method can achieve a smooth transition between grid-connected mode and islanding mode. The power supply system with backup power can be operated in grid-connected mode and islanding mode and transition period. The simulation waveforms given in the paper and experimental results are consistent with the theoretical analysis, which proves that adoptive control measure is correct.